GE Aurora H2O Moisture Analyzer User’s Manual
Below you will find brief information for Moisture Analyzer Aurora H2O. The Aurora H2O Moisture Analyzer for Natural Gas measures moisture content in natural gas with high precision and reliability. The Aurora H2O analyzer uses tunable diode laser absorption spectroscopy (TDLAS) to measure moisture in natural gas at the speed of light. The analyzer is suitable for installation in hazardous areas and operates over a wide range of environmental conditions. Aurora’s fast response quickly alerts and documents when moisture concentrations are out of compliance.
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GE
Measurement & Control Solutions
Aurora H
2
O
User’s Manual
Moisture
910-284 Rev. D
October 2011
GE
Measurement & Control Solutions
Aurora H
2
O
Moisture Analyzer for Natural Gas
User’s Manual
910-284 Rev. D
October 2011 www.ge-mcs.com
©2011 General Electric Company. All rights reserved.
Technical content subject to change without notice.
ii
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Preface
Information Paragraphs
• Note paragraphs provide information that provides a deeper understanding of the situation, but is not essential to the proper completion of the instructions.
• Important paragraphs provide information that emphasizes instructions that are essential to proper setup of the equipment. Failure to follow these instructions carefully may cause unreliable performance.
• Caution!
paragraphs provide information that alerts the operator to a hazardous situation that can cause damage to property or equipment.
• Warning!
paragraphs provide information that alerts the operator to a hazardous situation that can cause injury to personnel. Cautionary information is also included, when applicable.
Safety Issues
WARNING! It is the responsibility of the user to make sure all local, county, state and national codes, regulations, rules and laws related to safety and safe operating conditions are met for each installation.
Auxiliary Equipment
Local Safety Standards
The user must make sure that he operates all auxiliary equipment in accordance with local codes, standards, regulations, or laws applicable to safety.
Working Area
WARNING! Auxiliary equipment may have both manual and automatic modes of operation. As equipment can move suddenly and without warning, do not enter the work cell of this equipment during automatic operation, and do not enter the work envelope of this equipment during manual operation. If you do, serious injury can result.
WARNING! Make sure that power to the auxiliary equipment is turned OFF and locked out before you perform maintenance procedures on the equipment.
Qualification of Personnel
Make sure that all personnel have manufacturer-approved training applicable to the auxiliary equipment.
Personal Safety Equipment
Make sure that operators and maintenance personnel have all safety equipment applicable to the auxiliary equipment.
Examples include safety glasses, protective headgear, safety shoes, etc.
Unauthorized Operation
Make sure that unauthorized personnel cannot gain access to the operation of the equipment.
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Preface
Environmental Compliance
Waste Electrical and Electronic Equipment (WEEE) Directive
GE Measurement & Control Solutions is an active participant in Europe’s Waste Electrical and Electronic Equipment
(WEEE) take-back initiative, directive 2002/96/EC.
The equipment that you bought has required the extraction and use of natural resources for its production. It may contain hazardous substances that could impact health and the environment.
In order to avoid the dissemination of those substances in our environment and to diminish the pressure on the natural resources, we encourage you to use the appropriate take-back systems. Those systems will reuse or recycle most of the materials of your end life equipment in a sound way.
The crossed-out wheeled bin symbol invites you to use those systems.
If you need more information on the collection, reuse and recycling systems, please contact your local or regional waste administration.
Visit
http://www.ge-mcs.com/en/about-us/environmental-health-and-safety/1741-weee-req.html for take-back instructions and more information about this initiative.
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Contents
Chapter 1. Features and Capabilities
Aurora H
2
O User’s Manual v
Contents
Chapter 3. Operation and General Programming
vi Aurora H
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O User’s Manual
Contents
Chapter 4. Programming Advanced Features
Aurora H
2
O User’s Manual vii
Contents
Chapter 5. AuroraView Interface Software
Appendix A. MODBUS RTU / RS485 Communications
viii Aurora H
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Chapter 1. Features and Capabilities
Chapter 1. Features and Capabilities
1.1 Overview
GE’s
Aurora H
2
O Moisture Analyzer for Natural Gas makes it possible for natural gas processing and transportation facilities to monitor moisture content in real-time with high precision and reliability.
The
Aurora H
2
O analyzer uses tunable diode laser absorption spectroscopy (TDLAS) to measure moisture in natural gas at the speed of light. The analyzer is suitable for installation in hazardous areas and operates over a wide range of environmental conditions.
Aurora’s fast response quickly alerts and documents when moisture concentrations are out of compliance. Once process upsets are corrected and the gas dries out, the fast response quickly enables natural gas to be cleared for entry into the “energy grid”.
CLASS 1 LASER PRODUCT
WARNING!
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous laser exposure.
1.2 Features
• Optical response: <2 seconds once flow cell is purged.
• No cross sensitivity to glycols or amines.
• Direct readout in lbs/mmscf, mg/m
3
or ppm.
• Reads process pressure dew point (with user programmable constant or live auxiliary input for process pressure).
•
Turnkey sampling system specifically designed natural gas applications ensures measurement integrity.
• Magnetic Stylus enables through-glass programming – hot permit not required to field program.
• Explosionproof/Flameproof design
• 4-20 mA signals and RS-232/485 MODBUS RTU for connection to SCADA or plant monitoring system.
• Supplied with
AuroraView software for remote configuration, data logging and data retrieval capacity.
•
NIST traceable calibration.
• In conformance with IEC 60825-1 Edition 2.0, Safety of Laser Products.
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2
Chapter 1. Features and Capabilities
1.3 Theory of Operation
The GE
Aurora H
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O (Tunable Diode Laser Absorption Spectroscopy) hygrometer for natural gas is a system designed to continuously monitor the moisture content in natural gas. It fundamentally measures the partial pressure of water vapor (water in the gas state), and with the simultaneous measurement of pressure and temperature, provides readings and both analog and digital signal transmission of user-selectable moisture parameters including dew point temperature, volume ratio and absolute humidity (lbs/MMSCF or mg/m
3
) in addition to temperature and pressure.
The
Aurora H
2
O is supplied with an integrated sampling system which includes an optional pipe-mounted liquid separator and pressure reducing valve/regulator, and the following components mounted within a stainless steel enclosure: isolation valve, coalescing filter, coalescer flow control valve, sample cell control valve, second pressure reducing valve/regulator, and flow indicator (rotameter), as well as an optional electrical heater and thermostat.
The fundamental water vapor pressure measurement is based on the Beer-Lambert Law:
A
=
In
I
I o
=
SLN where:
A = Absorbance
I = Light intensity transmitted through a sample gas
I o
= Incident light intensity
S = Absorption coefficient*
L = Absorption path length (a constant)
N = Concentration of the water vapor in the absorption cell
* The absorption coefficient is a constant for a specific gas composition at a given pressure and temperature.
The concentration of the water is directly related to the partial pressure. At certain specific frequencies, light energy will be absorbed by water molecules. As the concentration of water increases, the absorption also increases. The
Aurora H
2
O sweeps the diode laser output across a narrow band in the near infrared spectrum and, by measuring the light intensity with a photo detector, is able to provide a direct indication of the partial pressure of water. The partial pressure, multiplied by 10
6
and divided by the total pressure, yields the volume ratio in ppm v
(parts per million by volume).
The laser diode is housed in a hermetically sealed and dry housing. The light is transmitted through a window made of proprietary transparent material. The light travels through a stainless steel cell and is reflected off a gold-plated mirror and returned to a photo detector, where the light intensity is measured.
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Chapter 1. Features and Capabilities
1.3 Theory of Operation (cont.)
Since only light comes in contact with the sample of natural gas, and all of the wetted materials are made of non-corrosive and inert materials, this technology does not exhibit the drift associated with gas contacting sensor-based hygrometers. The diode laser emits low energy light. Therefore the system will not ignite the gas. The complete system is rated explosion-proof. The
Aurora H
2
O provides very fast response time. Once the absorption cell is purged, the response time is a matter of a few seconds.
The control of the laser, power supply and signal conditioning circuitry are housed in an explosion-proof transmitter enclosure. A backlit, three-parameter, LCD display provides digital indication of user-programmable parameters. The
Aurora H
2
O has three user-programmable (4-20mA) analog outputs and two programmable digital ports that may be configured as either RS-485 or RS-232 with Modbus protocol. The analyzer has an auxiliary analog input (4-20mA) input that is used for connection to an optional process pressure transmitter. Measurement of the process pressure enables the
Aurora H
2
O to display and transmit the process dew point. AuroraView software is provided and enables remote readings, programming data logging and data logging with a personal computer.
The
Aurora H
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O hygrometer is calibrated against an NIST (or other national metrological institute) traceable reference dew/point generator and hygrometer. Each system is supplied with a certificate of calibration with functional test data.
Mirror Gas Inlet
Photodetector
Optical Window
Gas Outlet
Stainless Steel Absorption Cell Tunable Diode Laser
Hermetically Sealed Housing
Figure 1: Laser Absorption Cell, Basic Elements
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Chapter 1. Features and Capabilities
1.4 System Components
Note: Refer to Table 1 on page 6 for part descriptions.
4
Figure 2: Aurora H2O System Assembly with Optional USA/CAN Heater
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O User’s Manual
1.4 System Components (cont.)
Note: Refer to Table 1 on page 6 for part descriptions.
Chapter 1. Features and Capabilities
Figure 3: Aurora H
2
O System Assembly with Optional EU/ATEX Heater
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Chapter 1. Features and Capabilities
1.4 System Components (cont.)
Table 1: Aurora H
2
O System Parts List
No.
Description
1 Conduit I/O
2 Display and Magnetic Stylus Keypad
3 Wiring Terminals
4 Isolation Valve (ball valve)
5 Coalescing Filter
6 Coalescing Filter Drain & Fast Loop Vent
7 Pressure Regulator w/ 0-10 psig outlet pressure gauge
8 Flow Control Needle Valve
No.
Description
9 Process or Purge Gas Selector
10 Purge Gas Inlet Needle Valve
11 Absorption Cell
12 Temperature Sensor
13 Pressure Sensor
14 Rotameter
15 Optional Heater, thermostat, junction box
16 Magnetic Stylus
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Chapter 1. Features and Capabilities
1.4 System Components (cont.)
Note: The filter installed within the Aurora is designed to function as a secondary filter. A primary filter or filter train should be used upstream of the analyzer. Do not sample directly from the process gas to the Aurora without the use of a primary filter and pressure reduction. The pressure inlet to the Aurora sample inlet should not exceed 500 psig.
2.25 (57.1)
2
1.20 - 1.75
(30.48 - 44.45)
3
3.42
(86.8)
1
5.60 (142.2)
4
Overall Length
(See Detail A)
3
4
1
2
Probe/filter/regulator assembly
Pressure Gauge, 0 to 600 psig
2-way ball valve
Tube fitting
3/4" NPTM
NOTES:
1. Sample Process Connection: 3/4" NPTM
2. Sample Outlet Connection: 1/4" Compression Fittings
3. Dimensions are in inches (millimeters).
Probe Length
(See Detail A)
01
02
03
04
05
06
Part
Number
750-633
750-634
750-635
750-633
750-634
750-635
Detail A
Probe
Length
4.00"
7.00"
9.00"
4.00"
7.00"
9.00"
0.92
Figure 4: Sample System (ref. dwg #733-737)
Overall
Length
11.80"
14.80"
16.80"
11.80"
14.80"
16.80"
filter is described in this manual. The insertion filter also is equipped with a pressure regulator which functions to reduce the pressure. If it is not possible to install the insertion filter, consult GE applications engineers for information and a sample conditioning system.
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8
Chapter 1. Features and Capabilities
1.4 System Components (cont.)
THERMOSTAT
BROWN
LINE
NEUTRAL
230 VAC
L1
L2
G
120 VAC
L
N
G
J1
GROUND
ENCLOSURE WALL
(SHOWN FOR REFERENCE)
GEMT JUNCTION BOX
BLUE
GREEN/YELLOW
NOTES:
1. HEATER - USE GE PART NUMBER FROM 227-102 705-1238-01 AND -06.
2. DO NOT "DAISY-CHAIN" HEATER WIRING TO OR FROM AURORA ELECTRONICS
J1
16 AWG BROWN WIRE (2")
STRIP 1/4"
Figure 5: USA/CAN Heater Wiring Diagram
ATEX BARTEC JUNCTION BOX
CUSTOMER GROUND GREEN/YELLOW
CABLE FROM ATEX HEATER
CUSTOMER CABLE
BROWN
LINE 1
CUSTOMER NEUTRAL
BLUE
NEUTRAL
CUSTOMER LINE
NOTE: 705-1238-02 ATEX HEATER.
Figure 6: EU/ATEX Heater Wiring Diagram
RED PLUG
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Chapter 1. Features and Capabilities
1.5 Specifications
Power:
Universal Power Supply: 100-240VAC, 50-60Hz, 10W max. power
Optional Power Supply: 18-32VDC (24VDC), 10W
Optional Enclosure Heater Power: 120VAC, 120W or 230VAC, 75W
Moisture:
Parts per Million by Volume: ±2% of reading in ppmv or 4 ppm v
. Accuracy of other parameters derived from ppm v
Dew/Frost Point: –65.5°C to –2.6°C (–85.9°F to 27.3°F)*
Absolute Humidity: 3.8 to 3803 mg/m
3
(0.24 to 237 lbs/MMSCF)
Process or Equivalent Dew/Frost Point: by calculation with process pressure signal (4-20mA) or constant
*Readings below 0°C (32°F) are in “Frost Point” Temperature, and above 0°C (32°F) are in “Dew Point” Temperature.
Sample Pressure:
Range: 69 to 172 kPa (10 to 25 psia)
Maximum: 1380 kPa (200 psig) Higher pressure available using additional sampling system components.
Process Pressure:
10,342 kPa (1500 psig) maximum. Higher pressure available with application of additional sample system components.
Storage Temperature: –20° to +70°C (–4° to +158°F)
Operating Temperature:
Electronics: –20° to +65°C (–4° to 149°F)
Sample Gas: –20° to +65°C
Optional Heater/Thermostat Setpoint: 25°C (77°F)
Accuracy:
Moisture: ±2% of reading or 4 PPMv
Calibration Certification: NIST Traceable
Response Time:
Optical: <2 seconds once sample cavity is fully purged
Note: Total system response is dependent upon the change in moisture concentration, length of sample tubing, sample system components, flowrate and pressure.
Flow:
Sample Cell Flow Rate: 10 to 60 SLH (0.4 to 2 SCFH); 30 SLH (1 SCFH) nominal
By-pass Flow Rate: 5 to 10X of flowrate through sample cell.
Display: Backlit LCD digital display of up to three process parameters
Analog Outputs: Three 0/4-20mA DC (source), 500 maximum load. User programmable and scalable.
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Chapter 1. Features and Capabilities
1.5 Specifications (cont.)
Analog Input: Loop powered 4-20mA input for remote pressure transmitter. Aurora H
2
O supplied 24 VDC.
Digital Interface: Two programmable digital communications ports;
RS-232 and RS-485 with multidrop capability and assignate address. Modbus RTU protocol.
Software: Displays all key parameters. Provides time-base graphing. Data logging. Ability, export data as ASCII text.
Software has lockout/passcode.
Local User Interface: “Through the glass” magnetic keys. Ability to configure and scale unit in hazardous area without opening the enclosure. Local display/interface has a lockout and pass code.
Ingress Rating: IP-66
Dimensions (overall): 34”H x 18”W x 14”D (87 cm x 46 cm x 36 cm). See drawings.
Weight: approximately 45 kg (100 lbs)
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Electrical Classifications:
For use in the USA and Canada;
Explosion-Proof for Class I, Division 1, Groups C, D; Dust-Ignition Proof for Class II/III, Groups E, F, G;
T6; Tamb = –20° to +65°C; IP66.
ATEX and IECEx: Ex de IIB T6; Tamb = –20° to +65°C. Flameproof with increased safety compartment.
Laser Certification: USA FDA & IEC 60825-1 Edition 2.0, Safety of Laser Products.
European Certification: Complies with EMC Directive 2004/108/EC, Low Voltage Directive 2006/95/EC, and
Pressure Directive 97/23/EC for DN <25.
Sampling System: Integrated sampling system to filter out physical contaminants, remove glycol carry over, control temperature condition, regulate pressure and flow rate. Optional thermostatically controlled heater.
Wetted Components: 316/316L stainless steel for tubing and fittings. Other wetted components such as the optical window and mirror are proprietary materials and are compatible with natural gas and typical contaminants found in natural gas. Other sample system components wetted parts include PTFE, PFA, Inconel, Hastelloy, PVDF, glass, viton.
CLASS 1 LASER PRODUCT
WARNING!
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous laser exposure.
CAUTION!
CLASS 1M INVISIBLE LASER RADIATION WHEN OPEN. DO NOT VIEW DIRECTLY WITH OPTICAL
INSTRUMENTS.
10 Aurora H
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Chapter 2. Installation
Chapter 2. Installation
2.1 Introduction
The
Aurora H
2
O analyzer provides direct indication of moisture concentration in natural gas. Temperature and pressure sensors are used to provide high precision enhancement. It may be installed in a wide variety of environmental conditions, and meets the requirements for operation in hazardous areas.
Be sure that the ambient temperature is at least 10°C higher than the maximum dew/frost point temperature you expect to measure. This will ensure that you will not have liquid condensation in the sample transport line or the
Aurora H
2
O sampling system components. Heat tracing the sample line will aid in elevating the sample temperature above the dew point. An optional heater installed within the enclosure is also available.
2.2 Bill of Materials
The following should have been received with the shipment:
• Aurora H
2
O Unit
• Aurora H
2
O User’s Manual on CD ROM
• AuroraView Software on CD ROM
•
•
• Aurora H
2
O Calibration Data Sheet
Maintenance/Accessories Kit
Optional: Pipeline Insertion Filter/Regulator Assembly
2.3 Unpacking
The
Aurora H
2
O will be shipped in a packing box with a plywood base. The
Aurora H
2
O analyzer will be secured to the plywood base with mounting bolts.
Transport the shipping package with the plywood base down, and according to the warning labels on the exterior packaging. Open the packing box from the top.
Remove the foam packing material. Collect piece parts such as the
AuroraView
CD, the User Manual CD, and other items contained in the shipment.
Remove the mounting studs at the bottom of the enclosure. Using two people, lift the
Aurora H
2
O from the bottom of the enclosure and from top of the enclosure where the analyzer electronics is located. A typical
Aurora H
2
O weighs approximately 100 pounds (45kg). Use a proper lifting technique to avoid injury.
Check all the received pieces and record the model numbers and serial numbers for your records. If anything is missing, contact GE immediately.
Figure 7: Unpacking the Aurora H
2
O
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Chapter 2. Installation
2.4 Choosing A Site for Installation
You should have discussed environmental and installation factors with a GE Sales, Applications or Service Engineer by the time you receive the analyzer.
Before installing the analyzer, read the guidelines below on installation recommendations for consideration:
1. Choose an installation site for the
Aurora H
2
O analyzer as close to the actual sample point (sample take-off point) as possible, to minimize transport time to the analyzer.
2. Avoid unnecessarily long lengths of sample transport tubing to minimize transport time to the analyzer.
3. Avoid dead-legs in the sample transport tubing to minimize the possibility of liquid build-up.
4. Use stainless steel tubing. Avoid using copper tubing, as the water molecule has greater absorption capabilities for copper compared to stainless steel. Avoid rubber tubing at all costs, as water molecules interact with the rubber, and ambient moisture can permeate through the tube wall into the sample gas.
5. Mount the
Aurora H
2
O analyzer at grade, or at a location that is easily accessible for maintenance (on a platform or other structure).
6. Be sure that the ambient temperature is at least 10°C higher than the maximum dew/frost point temperature you expect to measure. This will ensure that you will not have liquid condensation in the sample transport line nor in the
Aurora H
2
O. Heat tracing the sample line will aid in elevating the sample temperature above the dew point. An optional heater installed within the enclosure is also available.
An
Aurora H
2
O system for monitoring moisture off a natural gas pipeline is shown in Figure 8 on page 13.
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2.4 Choosing A Site for Installation (cont.)
Chapter 2. Installation
Figure 8: Aurora H
2
O Analyzer Monitoring Moisture Off a Natural Gas Pipeline
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Chapter 2. Installation
2.5 Low Voltage Directive
To comply with the Low Voltage Directive, you must install a switch or circuit breaker on the input power line. For greatest safety, locate the circuit breaker or power switch near the electronics console.
IMPORTANT: Installation must be done in accordance with the National Electrical Code, the Canadian Electric Code, and/or any other applicable local codes.
2.6 Mounting
Use the four mounting tabs to mount the
Aurora H
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O System Assembly in the desired location (see Figure 31 on page 29).
IMPORTANT: The Aurora H
2
O should only be mounted vertically.
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Chapter 2. Installation
2.7 Optional Insertion Probe/Regulator
2.7.1 Description
For natural gas applications that may have entrained particulate and liquid contaminants (especially TEG carry-over from TEG dryers), GE recommends the use of a Insertion Probe/Regulator to serve as the first part of particulate and condensate filtration where the gas is sampled off the pipe. The device combines the features of a sample tap, a membrane filter and an integral pressure regulator (0-500psig outlet), adjustable at the sample take-off point. The sample tap housing includes a foot-valve so that, once installed, the assembly can be removed from a line under pressure for membrane filter replacement as needed.
Figure 9: Insertion Probe/Regulator
Note: A 29/32” (0.907 inch, 23.1 mm) minimum bore-through clearance is needed on the customer nozzle for insertion of a 3/4” NPT insertion membrane liquid separator/pressure regulator.
2.7.2 Installation
Note that the Optional Insertion Probe/Regulator can be installed only on depressurized lines. There is no hot-tap installation for this device.
This procedure is broken down into two steps:
• Installing the Housing
• Installing the Insertion Probe/Regulator Assembly
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Chapter 2. Installation
2.7.2a Installing the Housing
A picture of the housing is supplied below. The housing is supplied with a Locking Mechanism to ensure that housing can only be removed intentionally.
Slots Vertical
Set Screws
Locking
Mechanism
Horizontal
Set Screw
Horizontal
Set Screw
Foot Valve Locking Mechanism
Figure 10: Installing the Housing and Locking Mechanism
1. Turn the locking mechanism counter-clockwise until it is at its extreme upper position. Apply thread sealant to the threaded area below vertical slots in the threads. Do not allow the thread sealant to invade the slot, as it may interfere with the mechanism.
Thread Sealant
Figure 11: Applying Thread Sealant
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Chapter 2. Installation
2.7.2a Installing the Housing (cont.)
2. Confirm that the pipeline has been depressurized. Insert the housing into the pipeline through a ¾” NPTF thread-o-let (The minimum ID of the thread-o-let is 0.91”).
Housing
¾” NPTF Thread-O-Let
Figure 12: Inserting Housing into Pipeline
3. Using a wrench with wrench flats, turn the housing until it is secure and sealed. This will require between three and five turns. DO NOT OVERTIGHTEN. The housing may be damaged if it is over-tightened, causing the housing to swage.
Wrench
Flats
180° apart
Aurora H
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Figure 13: Tightening the Housing
17
Chapter 2. Installation
2.7.2a Installing the Housing (cont.)
4. Turn the locking mechanism clockwise until it first touches the top of the thread-o-let.
5. Turn the locking mechanism counterclockwise until the Allen screw is aligned with the thread slot. Using a 1/8”
Allen wrench, tighten the Allen screw until its tip is tight against the slot. DO NOT OVERTIGHTEN THE ALLEN
SCREW as this will cause the housing wall to be indented.
Figure 14: Aligning and Tightening the Allen Screw
6. Using a 3/32” Allen wrench, tighten the Allen screws on the locking mechanism's surface until their tips are firmly set into the thread-o-let’s upper surface.
Figure 15: Tightening the Allen Screws
The housing is now installed. The locking mechanism should prevent the housing from becoming unintentionally unscrewed from the thread-o-let. The pipeline my now be pressurized.
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Chapter 2. Installation
2.7.2b Installing the Insertion Membrane Liquid Separator/Pressure Regulator Assembly
1. Confirm that the allen cap screw head’s hex cavity is clean and free from foreign material. Confirm that the allen cap screw that holds the membrane ferrule is torque-wrench tight. The torque value should be 10 inch lbs. If the allen cap screw is only hand-tight, the screw may protrude excessively, which could result in foot valve actuation when the probe is installed into the housing.
Allen Cap Screw
Figure 16: Checking/Tightening the Allen Cap Screw
2. Rotate the pressure adjustment screw on the pressure regulator fully counterclockwise until it rotates freely. Close the isolation ball valve.
Pressure Adjustment Screw
Pressure Gauge
Isolation Ball Valve
Aurora H
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Figure 17: Rotating the Pressure Adjustment Screw
19
Chapter 2. Installation
2.7.2b Installing the Insertion Membrane Liquid Separator/Pressure Regulator Assembly (cont.)
3. Position the membrane end of the probe above the installed housing. Slowly lower the probe into the housing.
Avoid membrane contact with the upper section of the housing. DO NOT APPLY DOWNWARD FORCE. The probe should slide easily into the housing. Lower the probe only enough to thread the insertion nut one complete turn of thread engagement.
Membrane
Housing
First
Vertical
Slot
Membrane
Spring
Guard
Second
Vertical
Slot
Insertion
Nut
Insertion
Washer
Housing
Figure 18: Installing the Probe
4. Thread the insertion nut down by hand, lowering the probe until the insertion washer pins slide to the bottom of the first vertical slot.
Note: The threaded nut on the housing ensures that if all other safety procedures are disregarded, it is mechanically impossible to remove the probe.
Insertion
Nut
Pin
Housing
Insertion
Washer
Figure 19: Threading the Insertion Nut
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Chapter 2. Installation
2.7.2b Installing the Insertion Membrane Liquid Separator/Pressure Regulator Assembly (cont.)
5. Rotate the probe counterclockwise until the pins are to the far right in the horizontal slot. At this point, the probe is sealed against the housing interior wall. The pins will be in the middle of the second vertical slot.
Figure 20: Rotating the Probe
6. Loosen the insertion nut until it is above the top of the second vertical slot. The probe should not rise to the top of the second vertical slot. If the probe rises in the slot, the foot valve o-ring may have been damaged or attacked by the process.
Note: The threaded nut on the housing ensures that if all other safety procedures are disregarded, it is mechanically impossible to remove the probe. Perform the next step regardless of the status of the foot valve o-ring.
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Figure 21: Loosening the Insertion Nut
21
Chapter 2. Installation
2.7.2b Installing the Insertion Membrane Liquid Separator/Pressure Regulator Assembly (cont.)
7. Tighten the insertion nut by hand until it is against the insertion washer again. Using a wrench, tighten the insertion nut against the insertion washer so that the pins are at the bottom the second vertical slot. At this point the foot valve opens and the insertion process is complete.
Figure 22: Tightening the Insertion Nut
22 Aurora H
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Chapter 2. Installation
2.7.3 Setting the Pressure
Note: Perform these steps only after the entire system is plumbed up, including the Aurora H
2
O.
1. Ensure the inlet sample gas isolation valve on the
Aurora H
2
O sample system is closed. Open the isolation ball valve at the Optional Pipeline Insertion Membrane Liquid Separator/Pressure Regulator.
2. Turn the pressure adjustment screw clockwise to increase the pressure. The optional pipeline insertion membrane liquid separator/pressure regulator is the FIRST STAGE pressure reduction of the system when used. Depending upon your source pressure, you should step down the pressure to a value in the range given in the table below.
Source Pressure
750 psig < source < 1500 psig
500 psig < source < 750 psig
< 500 psig
Outlet Pressure Setting
400-500 psig
300 psig
50% of the average source pressure
Pressure
Adjustment
Screw
Lock
Nut
Pressure
Gauge
Figure 23: Turning the Pressure Adjustment Screw
3. Tighten the lock nut down to the top of the pressure regulator to avoid future possible changes in pressure regulator setting, once the pressure is set.
Aurora H
2
O User’s Manual 23
Chapter 2. Installation
2.8 Making Electrical Connections
Refer to Figure 32 on page 30 for wiring connections.
1.
Aurora H
2
O has three ¾” NPT conduit inlet ports for power and I/O. These will normally be shipped plugged from the factory. Follow the applicable wiring code and requirements for wiring the unit.
Figure 24: Conduit Inlet Ports
Note: Use one conduit inlet for power. Use the two other conduit inlets for input/output as needed. All unused conduit inlet ports should be sealed with suitable blanking elements.
2. Use one conduit for inlet power to the
Aurora H
2
O based on your configuration. The Aurora H
2
O comes with a universal power supply, or optionally, as a 24VDC powered unit. Remove the wiring cover to view the wiring terminal block.
24
Figure 25: Wiring Terminal Blocks
Aurora H
2
O User’s Manual
Chapter 2. Installation
2.8 Making Electrical Connections (cont.)
Note: Supply connection wiring shall be rated at least 10°C above the rate maximum service temperature of 85°C, be stripped back 5/16 in. (8 mm) and torqued to a minimum of 4.4 in. lb. (0.5 Nm).
AWG (3.3 - 0.82 mm
2
) power wiring.
Figure 26: Power Terminal Block
4. Use wiring conduit runs, separate from the
Aurora H
2
O main power, for all I/O (Input/Output) leads. Wire up to three 4-20mA outputs to the terminals labeled A, B, and C. The three analog outputs A, B and C (0-20mA or
4-20mA) are internally powered by the
Aurora H
2
O. Use shielded 18-22 AWG (0.82–0.33 mm 2
) twisted pair wire, and ground the shield at one end only. Wire up digital communications to Port 1 and/or Port 2 as labeled.
5. Either digital port may be configured for RS-232 or RS-485. Port 1 is designated as “SCADA.” Port 2 is designated as “SERVICE.”
• For operation on RS-485, 2-wire, half-duplex bus, attach the RS-485(+) to (+), and the RS-485(–) to (–). Make no connection to RTN.
Note: For an RS-485 Multidrop Network, a terminating resistor must be installed across the Aurora H
2
O RS-485 terminals, or an internal terminating resistor can be applied. See below.
When using the
Aurora H
2
O in RS-485 mode, and to prevent signal reflections on the high-speed RS-485 connections, it is recommended that the far end of the RS-485 lines be terminated properly. The termination can be accomplished in one of two ways:
a. Connect 120
¼W leaded resistors across the + and – terminals of ports 1 and 2 (both ports or whichever one will be in use), or
b. Using long-nose pliers, move jumpers J15 and J16 from pins 2 and 3 (default setting from factory) to pins 1 and
recommended that basic ESD precautions such as grounded wrist straps be used for this procedure.
Aurora H
2
O User’s Manual 25
Chapter 2. Installation
2.8 Making Electrical Connections (cont.)
Multi-drop RS-485:
For multiple
Aurora H
2
O units connected in daisy-chain fashion to the RS485 interface, it is important that the farthest unit away from the transmitting device be the only unit incorporating any termination. All other units must have jumpers J15 and J16 in positions 2 & 3 (default setting from the factory). For more details on RS-485 wiring or operation, refer to TIA/EIA-485-A Specification.
1 3
J16
2
1 3
2 J15
Figure 27: RS-485 Mode Termination - Install Jumpers at J15 and J16, Pins 1 and 2
Note: Terminations are NOT required when using ports in RS-232 mode.
• For operation on RS-232, connect RS-232(TXD) to (+), RS-232(RXD) to (–), and RS-232(GND) to RTN.
Figure 28: Input/Output Connections
26 Aurora H
2
O User’s Manual
Chapter 2. Installation
2.8 Making Electrical Connections (cont.)
6. For connection to a PC to interface with AuroraView Software, you may use the supplied 704-688 cable (RS-232 w/ SUB-D-9 connector to tinned leads). Wire the cable as follows:
Color Code
White
Red
Green
Tx
Rx
Ground
Aurora H
2
Terminal
O
+
–
RTN
Note: The default configuration is as shipped:
BAUD Rate 115,200
Parity Even
ID Note 1 for Port 1, 2 for Port 2
7. Use a separate wiring conduit run for any 4-20mA pressure transmitter input. This input is used when a live input pressure reading for the main process pressure is desired, to determine an equivalent dew point by the
Aurora H
2
O analyzer. Wire the 4-20mA pressure transmitter to the Pressure Transmitter terminal block. The
Aurora H
2
O supplies 24VDC for use with a loop-powered, 2-wire pressure transmitter.
Figure 29: Pressure Transmitter Connections
Note: Use of an external pressure transmitter is not covered by the Aurora H
2
O hazardous area certifications. The external pressure transmitter should be suitably rated for the area classification. Its associated wiring should be done in accordance with local codes and regulations, and suitably rated for the area classification.
8. If the
Aurora H
2
O has been supplied with an optional electrical heater, there are two possible configurations:
USA/CAN or EU. Connect the AC power using a separate conduit from the power for the
Aurora H
2
O analyzer.
The heater is equipped with a thermostat preset to 25°C (77°F) nominal. Use 12-18 AWG (3.3 - 0.82 mm
2
) wires.
Aurora H
2
O User’s Manual 27
Chapter 2. Installation
9. Lastly, the
Aurora H
2
O analyzer requires a connection to ground from the electronics explosion-proof/flame-proof enclosure. There are two external ground connections available for the user (on the left and right hand sides of the enclosure). Wire this connection to earth ground, local to the
Aurora H
2
O analyzer installation site.
Figure 30: Earth Ground Connection
28 Aurora H
2
O User’s Manual
33.12
26.16
24.26
Aurora H
2
O User’s Manual
.95
18.31
15.66
10.92
1.622
13.08
.125
9.29 TYP
Chapter 2. Installation
3.18 TYP
10.24
24.91
29
Chapter 2. Installation
GROUND BAR
Aurora H
2
O User’s Manual
SEE NOTE 1
CUSTOMER GROUND
NOTES:
1.
2.
I/O CONNECTIONS AND PRESSURE TRANSMITTER WIRE GAUGE RANGE 12-24 AWG.
AC AND DC CONNECTION WIRE GAUGE RANGE 12-18 AWG.
L1 L2/N G
2
V
[OUTPUT]
A
+ –
4-20mA
B
+ –
C
+ –
RS-485
PORT 1 PORT 2
+ – + –
AC OPTION SHOWN
DC WIRING + –
SEE NOTE 2
I/O CONNECTIONS
SEE NOTE 1
30
Chapter 3. Operation and General Programming
Chapter 3. Operation and General Programming
3.1 Using the Aurora H
2
O
Follow the information in this chapter to operate the
Aurora H
2
O system.
CLASS 1 LASER PRODUCT
WARNING! Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous laser exposure.
3.2 Sample System
See the instructions below and Figure 33 on page 32 to operate the
Aurora H
2
O sample system.
3.2.1 Startup
1. Start with all valves in closed position and the pressure regulator turned fully counter-clockwise.
2. Turn the Sample/Purge 3-way ball valve to point towards the sample needle valve.
3. Sample Inlet gas pressure should be <400 psig (2760 kPa).
4. Confirm that there are no pressure restrictions downstream of the sample outlet flowmeter.
5. Open the inlet isolation ball valve.
6. Crack the bypass valve ¼ turn to establish coalescer bypass flow (fast loop). Establish a flow rate of approximately 10 x the sample flow through the bypass (10 SCFH/5 LPM nominal). The gas from this vent can be piped to a process or flare.
7. Turn the pressure regulator clockwise until the pressure gauge reads approximately 3-5 psig.
8. Open the sample needle valve until the flowmeter reads 30 SLPH (1 SCFH).
3.2.2 Shut Down
1. Close the inlet isolation ball valve.
2. Turn the pressure regulator fully counter-clockwise.
3. Close the sample needle valve.
4. Close the bypass needle valve.
3.2.3 Purge
1. Hook up the purge gas.
2. Regulate the pressure externally to 3-5 psig.
3. Turn the sample/purge 3-way ball valve towards the purge inlet.
4. Crack the purge inlet needle valve to set the to 30 SLPH (1 SCFH).
Aurora H
2
O User’s Manual 31
Chapter 3. Operation and General Programming
3.2 Sample System (cont.)
INLET ISOLATION
BALL VALVE
PRESSURE
REGULATOR
SAMPLE
NEEDLE VALVE
BYPASS
NEEDLE VALVE
SAMPLE/PURGE
3-WAY BALL VALVE
32
Figure 33: Aurora H
2
O Sample System Quick Startup Guide (ref. dwg #902-004)
Aurora H
2
O User’s Manual
Chapter 3. Operation and General Programming
3.3 Keypad Features
Menu Power Indicator
Main Display
Laser Indicator Fault Indicator
Information
Indicator
Keypad Lock
Indicator
Cancel
Enter
Up, Left, Right,
Down Arrows
Figure 34: Aurora H
2
O Keypad
The
Aurora H
2
• Use the
Menu key to open the main menu on the display.
• Use the arrow keys to navigate among menu choices and to increment/decrement numeric entries.
• Use the
• Use the
Enter
key to accept a numeric entry or select a menu option.
Aurora H
2
O User’s Manual 33
Chapter 3. Operation and General Programming
3.3.1 Indicator Lights
If the
Fault Indicator is lit, an instrument fault is detected. A message will be displayed in the Main Display, top/right.
If the
Information Indicator is lit, the instrument is still operating, but a message will appear in the Main Display top/right, with information about the instrument.
The
Keypad Lock Indicator will be lit if either: A) the Keypad Lock-Out Switch, internal to the instrument, has been engaged, or B) the instrument keypad has not been used for a period of several minutes, engaging a software feature to lock-out inadvertent key usage. Type (B) keypad lock-out is overcome by pressing
Cancel, Enter, Cancel in sequence.
If the
Laser Indicator is lit, the laser is powered and operating normally. This indicator will be off if there is a laser-specific fault. This indicator will also be off for a brief period when the instrument is first powered. After initial power-up, this indicator may blink several times as the laser temperature is stabilized. The laser indicator will be lit constantly in normal operation.
The
Power Indicator is normally lit when the instrument is powered.
3.3.2 The Magnetic Stylus
Each of the keys can be selected using a hand-held magnet called a Magnetic Stylus, which is included with the meter.
By touching the clear window at a key location, that key will be selected and will flash a red light to verify the contact.
Figure 35: Magnetic Stylus
3.3.3 The Default Display
Figure 36 shows the default display of the
Aurora H
2
O window.
PPM
v
H
2
O
Primary
Alt 1 Alt 2
Figure 36: Default Display
34 Aurora H
2
O User’s Manual
Chapter 3. Operation and General Programming
3.3.4 Unlocking the Keypad
After power-on, the
Aurora H
2
O keypad is locked as indicated by the symbol , lit up with a red backlight. It is necessary to enter the keypad unlock sequence to make any changes to the
Aurora H
2
O.
Similar to a mobile phone, the
Aurora H
2
O will prompt the operator to unlock if any key is pressed. A passcode is required to use certain factory service features only.
To unlock the keypad, press
3.3.5 Keypad Lock-Out Switch
Keypad
Lock-Out Switch
Keypad Lock Indicator
Figure 37: Keypad Lock-Out Switch Location
Note: If the Keypad Lock-Out Switch is in the “down” position (towards the Aurora H
2 is locked out and the
RED LED on the Keypad Lock Indicator is on all the time.
O sample system), the keypad
WARNING! Do not open or remove the cover with the power on, unless the area is non-hazardous.
Aurora H
2
O User’s Manual 35
Chapter 3. Operation and General Programming
3.3.6 Accessing the Menus
After successfully unlocking the keypad, press the Menu key. The
Aurora H
2
O will display the Main Menu (see
Press
Enter
to select the highlighted item. Many menu items will display another menu. Use the previous menu page. Pressing
Note: Menu items displayed with an ellipsis (shown as a series of three dots after the menu item) will bring up more choices, while those without take immediate action.
Figure 38: Main Menu
3.3.7 Entering Numeric Values
Since the
Aurora H
2
O has no numeric keypad, numeric values are entered using a “combination lock” style of entry:
Use the
left
Use the
up down
arrow keys to increment or decrement the digit.
Note: If incrementing or decrementing a digit would cause the numeric value to exceed its allowable range
(maximum/minimum value), the digit will not change.
Press
Enter
to save the new value and return, or
Figure 39: Numeric Entry
36 Aurora H
2
O User’s Manual
Chapter 3. Operation and General Programming
3.3.8 Starting Up
After proper installation, the
Aurora H
2
O Transmitter can be set up to accommodate the user’s requirements. Typically, the user may need to configure the analog outputs, trim the analog outputs, and program the digital outputs. Refer to the
Menu Map, Figure 73 on page 87, and complete the following steps. Upon startup, the
Aurora H
2
O proceeds through several displays until a screen similar to the following appears:
PPM
v
H
2
O
After startup, the screen will need to be unlocked. To unlock the screen, select
Note: In most instances; use the Enter key to save an entry and/or move ahead to the following screen; use the
Cancel key to reject an entry and/or return to the previous screen.
3.4 Setting Up the Display
When the screen is unlocked, touch the
Menu key and the Main Menu appears with several options. To set up the display, select
Display... and press Enter. The following screen appears:
3.4.1 Selecting Primary Units
To select units for the primary display, select
Primary and press Enter. The following screen appears:
Use the arrow keys to highlight the desired units and press
Enter. The screen returns to the
Display Menu.
Aurora H
2
O User’s Manual 37
Chapter 3. Operation and General Programming
3.4.2 Selecting Alt 1 and Alt 2 Units
To set the units for
Alt 1 and/or Alt 2, use the arrow keys to highlight the one to be set, and press
Enter. The following screen appears:
Use the arrow keys to highlight the desired unit type (
Hygro, Temperature or Pressure) and press
Enter. If Temp is selected, the following screen appears.
t 1 Units: Use the arrow keys to highlight the desired unit and press
Enter. The screen returns to the
Display Menu. Use the same procedure to change other units.
3.4.3 Setting Decimal Places
To set the decimal places for unit values, from the
Display Menu use the arrow keys to highlight
Decimal and press Enter. Then select the type of display and press Enter.
The decimal places setting determines the number of digits displayed for the value to the right of the decimal symbol (“.”), if possible.
Use the arrow keys to change the number of decimal places and press
Enter, or press
Cancel if no changes are necessary. The screen returns to the Display Menu.
3.4.4 Data/Scan
To toggle the display between showing the numeric values (data), and a graphic plot of the 2f waveform (scan), from the
Display Menu use the arrow keys to highlight
Data/Scan and press Enter. A screen similar to the following appears.
Note:The scan can be used for diagnostic purposes when a PC with AuroraView is not readily available.
38 Aurora H
2
O User’s Manual
3.4.5 Adjust
3.4.6 Reverse
Chapter 3. Operation and General Programming
To modify the display contrast and brightness, from the
Display Menu use the arrow keys to highlight
Adjust and press Enter. The following screen appears.
Use the
Up/Down arrow keys to increase/decrease display brightness. Use the
Right/Left arrow keys to increase/decrease display contrast. Press Enter to save the changes, or press
Cancel to return to the previous setup. The screen returns to the
Display Menu.
To reverse the text and background shades, from the
Display Menu use the arrow keys to highlight
Reverse and press Enter. The following screen appears.
Data/Scan
To return to the previous shade setup, select
Reverse and press Enter. The previous screen appears.
Reverse
3.5 Setting Up Outputs
3.5.1 Selecting an Output for Setup
To set up outputs, from the
Main Menu choose Outputs... and press Enter. The following screen appears.
From the
Output Menu choose Select and press Enter. The following screen appears.
Use the arrow keys to select the output (
A, B or C) to be set up, and press Enter.
Aurora H
2
O User’s Manual 39
Chapter 3. Operation and General Programming
3.5.2 Selecting Output Units
From the
Output Menu, select Units and press Enter. Use the arrow keys to select the unit type and press
Enter. A screen similar to the following appears:
Use the arrow keys to select a new unit. Press
Enter to save (or Cancel to keep the previous value), and return to the
Output Menu.
3.5.3 Selecting an Output Type
To change the output type, from the
Output Menu select Type and press Enter. A screen similar to the following appears:
Use the arrow keys to select a new output type. Press
Enter to save (or Cancel to keep the previous value), and return to the
Output Menu.
3.5.4 Changing the Upper Output Span
To adjust the upper output span, from the
Output Menu select Upper and press Enter. A screen similar to the following appears.
Use the left and right arrow keys to select each digit to be changed and the up and down arrow keys to increase or decrease its value. Press
Enter to save (or Cancel to keep the previous value), and return to
Output Menu.
40 Aurora H
2
O User’s Manual
Chapter 3. Operation and General Programming
3.5.5 Changing the Lower Output Span
To adjust the lower output span, from the
Output Menu select Lower and press Enter. A screen similar to the following appears.
Use the left and right arrow keys to select each digit to be changed and the up and down arrow keys to increase or decrease its value. Press
Enter to save (or Cancel to keep the previous value), and return to
Output Menu.
3.5.6 Testing the Output
The
Test Menu causes the Aurora H
2
O to generate a 0- or 4-20mA output at the percent of scale selected. For example, in 4-20 operation, 0% = 4mA, 50% = 12mA, 100% =
20mA. This allows the proper function of recording or SCADA equipment to be verified. In 0-20 operation, 0% = 0mA, 50% = 10mA, 100% = 20mA.
To test system output, from the
Output Menu select Test and press Enter. The Aurora
H
2
O will proceed to check the settings, and a screen similar to this display will appear.
Use the left and right arrow keys to select each digit to be changed, and the up and down arrow keys to increase or decrease its value. Press
Enter to save (or Cancel to keep) the previous value, and return to the
Output Menu.
Check your output wiring. If the reading on your SCADA or DCS is off slightly, then you may use the
Trim feature to trim the output zero or span.
Aurora H
2
O User’s Manual 41
Chapter 3. Operation and General Programming
3.5.7 Trimming the Outputs
The
Trim Menu enables the operator to compensate for differences in measurement of the 0/4-20 mA outputs by connected recorders or SCADA equipment. To trim the output:
Select
Trim from the Output Menu and press Enter. The following screen appears.
To select an output to be trimmed, highlight
Select Trim Output and press Enter. The following screen appears
Use the left and right arrow keys to select an output (
A, B or C) and press Enter. The screen returns to the previous display.
When performing a
Trim operation, the Aurora H
2
O unit requires you to first reset the trim. To reset the trim output, highlight
Reset Trim and press Enter. The following screen appears.
Use the left or right arrow keys to highlight
YES and press Enter. This cancels any previous trim values, and returns the
Aurora H
2
O to its factory adjustment. The display returns to the previous screen with
Trim Zero highlighted.
To trim the zero value, press
Enter. A screen similar to the following appears.
This will cause the
Aurora H
2
O to output 4.000 mA on the output being trimmed. The output value should then be read using the connected recorder, SCADA equipment, or
DVM. Enter the value read from the connected equipment as the
Zero Trim value, as follows:
42 Aurora H
2
O User’s Manual
Chapter 3. Operation and General Programming
3.5.7 Trimming the Outputs (cont.)
Note: Since you cannot trim 0 mA for negative offsets, trim for the lower end of the scale is at the 4 mA output level.
Use the left and right arrow keys to select each digit to be changed, and the up and down arrow keys to increase or decrease its value. Press
Enter to save (or Cancel to keep the previous value).
The
Trim Menu returns with Trim Span highlighted. To change the span value, press
Enter. A screen similar to the following appears.
This will cause the
Aurora H
2
O to output 20.000 mA on the output being trimmed. The output value should then be read using the connected recorder, SCADA equipment, or
DVM. Enter the value read from the connected equipment as the
Span Trim value.
Use the left and right arrow keys to select each digit to be changed, and the up and down arrow keys to increase or decrease its value. Press
Enter to save (or Cancel to keep the previous value).
Trimming is complete. Accuracy can be verified using the
Test Menu, above.
Example:
Trim is reset, then Trim Zero is selected. The SCADA input reports 3.977 mA.
The operator enters “3.977” as the
Zero Trim value.
Trim Span is selected. The SCADA input reports 19.985 mA.
The operator enters “19.985” as the
Span Trim value.
Aurora H
2
O will adjust the output accordingly to true the output as read by the customer recorder, SCADA or DVM.
Using the
Test Menu, the operator verifies that a test value of 0% now reads 4.000 mA at the SCADA equipment, and a test value of 100% now reads 20.000 mA.
3.6 Setting Up Alarms
Note: The Aurora H
2
O is not equipped with alarm relays. The Alarm function is useful only when reading the alarm status via Modbus.
3.6.1 Selecting an Alarm Output
To set up alarm outputs, on the
Main Menu choose Alarm and press Enter. From the
Alarm Menu choose Select and press Enter. A screen similar to the following appears.
Use the arrow keys to select the output (
A, B or C) to be set up and press Enter. The display returns to the
Alarm Menu.
Aurora H
2
O User’s Manual 43
Chapter 3. Operation and General Programming
3.6.2 Selecting Alarm Status
To select the alarm status, from the
Alarm Menu select Status and press Enter. The following screen appears:
Use the arrow keys to select
OFF or ON and press Enter. The display returns to the
Alarm Menu.
3.6.3 Selecting Alarm Units
To select alarm units, from the
Alarm Menu select Units and press Enter. Use the arrow keys to select the unit type and press
Enter.
If
Hygro was selected, this display appears. Use the arrow keys to select a unit. Press
Enter to save (or Cancel to keep the previous value), and return to the Alarm Menu.
If
Temperature was selected, this display appears. Use the arrow keys to select a unit.
Press
Enter to save (or Cancel to keep the previous value), and return to the Alarm
Menu.
If
Pressure was selected, this display appears. Use the arrow keys to select a unit. Press
Enter to save (or Cancel to keep the previous value), and return to the Alarm Menu.
44 Aurora H
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O User’s Manual
Chapter 3. Operation and General Programming
3.6.4 Selecting an Alarm Type
To change the alarm type, from the
Alarm Menu select Type and press Enter. A screen similar to the following appears:
Use the arrow keys to select an alarm type. Press
Enter to save (or Cancel to keep the previous value), and return to the
Alarm Menu.
• SetPoint: Alarm activates when parameter exceeds upper limit, and deactivates when parameter is less than lower limit.
• Inner Band: Alarm activates when parameter is between upper and lower limits.
• Outer Band: Alarm activates when parameter is outside upper and lower limits.
3.6.5 How the Alarm Types Work
Trip
Setpoint Hysteresis
Upper
Lower
Reset
Reset
Trip
Trip
In Band
Reset
Trip
Out Band Reset
Reset
Trip
Figure 40: Example of Alarm Types
Aurora H
2
O User’s Manual 45
Chapter 3. Operation and General Programming
3.6.6 Changing the Upper Alarm Span
To adjust the upper alarm span, from the
Alarm Menu select Upper and press Enter. A screen similar to the following appears.
Use the left and right arrow keys to select each digit to be changed and the up and down arrow keys to increase or decrease its value. Press
Enter to save (or Cancel to keep the previous value), and return to
Output Menu.
3.6.7 Changing the Lower Alarm Span
To adjust the lower alarm span, from the
Alarm Menu select Lower and press Enter. A
Use the left and right arrow keys to select each digit to be changed and the up and down arrow keys to increase or decrease its value. Press
Enter to save (or Cancel to keep the previous value), and return to
Output Menu.
46 Aurora H
2
O User’s Manual
Chapter 4. Programming Advanced Features
Chapter 4. Programming Advanced Features
4.1 Comm Port Settings
To access the communication port settings, from the
Main Menu select Settings.and press
Enter. The following screen appears:
To access the communications port settings, select
Comms... and press Enter. The following screen appears:
4.1.1 Selecting a Comm Port
There are two physical comm ports in the
Aurora H
2
O. Comm Port 1 is aligned to
SCADA in the instrument program and
Comm Port 2 is aligned to SERVICE. This setup enables the user to have
Comm Port 1 set up for the primary digital output (for example,
RS-485 to the customer SCADA system), and
Comm Port 2 to be used for service (for example, to enable a service engineer to interface with the
Aurora H
2
O using an
RS-232 cable connected to a lap top in the field, running
AuroraView software).
To select a communication port, use the arrow keys to highlight
Select and press Enter. The following screen appears.
Select
SCADA or SERVICE and press Enter. The screen returns to the Comm Port Menu.
4.1.2 Setting the Baud Rate
To set the baud rate, from the
Comm Port Menu select Baud Rate and press Enter. The following screen appears.
Use the arrow keys to highlight the desired baud rate and press
Enter. The screen returns to the
Comm Port Menu.
IMPORTANT:If you are using version 1A of the Aurora H2O, do not select 1200 or
2400 baud rate.
Aurora H
2
O User’s Manual 47
Chapter 4. Programming Advanced Features
4.1.3 Setting Parity
To set parity, from the
Comm Port Menu select Parity and press Enter. The following screen appears.
Use the arrow keys to highlight the desired parity and press
Enter. The screen returns to the
Comm Port Menu.
4.1.4 Selecting Protocol
To select protocol, from the
Comm Port Menu select Protocol and press Enter. The following screen appears.
Use the arrow keys to highlight the desired protocol and press
Enter. The screen returns to the
Comm Port Menu.
4.1.5 Setting the Network ID
To set the network ID, from the
Comm Port Menu select Network ID and press Enter.
The following screen appears.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the
Comm Port Menu.
48 Aurora H
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Chapter 4. Programming Advanced Features
4.2 Adjust Offset Values
To adjust offset values, from the
Settings Menu select Adjust... and press Enter. The following screen appears.Z
4.2.1 Adjusting the PPMv Offset
User Adjustments
PPM Level
Filter
Dew Pt Calc
Enh Factor
To adjust the PPMv offset, select
PPM Level and press Enter. The following screen appears.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the
User Adjustments Menu.
4.2.2 Adjusting the Smoothing Filter Offset
User Adjustments
PPM Level
Filter
Dew Pt Calc
Enh Factor
To adjust the smoothing filter offset, from the
User Adjustments Menu select Filter and press
Enter. The following screen appears.
The smoothing filter setting is used to change the system responsiveness. It is a moving average filter to smooth the moisture readings. 1 sample = 1 scan. Generally,
Aurora
H
2
O can perform up to 12 samples per second. The minimum setting is 10 samples. The maximum setting is 200 samples. The default is set at the factory. A typical default value is 40.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the User Adjustments Menu.
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Chapter 4. Programming Advanced Features
4.2.3 Setting the Dew Point Calculation Method
• The dew point is the temperature at which the air is saturated with respect to water vapor over a liquid surface.
• The frost point is the temperature at which the air is saturated with respect to water vapor over an ice surface.
There can be a difference of several degrees C between the dew and frost point.
• When set for
Dew/Frost, the Aurora H
2
O will report the Dew Point if the reading is above freezing, and report the
Frost Point if the reading is below freezing.
• When set for
Dew Point, the Aurora will calculate the Dew Point temperature, even if that temperature is below freezing.
User Adjustments
PPM Level
Filter
Dew Pt Calc
Enh Factor
To set the dew point calculation method, from the
User Adjustments Menu select Dew
Pt Calc and press Enter. The following screen appears.
Use the arrow keys to highlight the desired dew point setting and press
Enter. The screen returns to the
User Adjustments Menu.
• The Dew calculation should be used for compatibility with ASTM-1142/IGT-8. The tables and calculations in those reports require measurements and provide results in dew point, regardless of the actual phase (dew or frost).
• The Dew/Frost calculation should be used for compatibility with ISO-18453:2004, or when using a chilled mirror apparatus as a check standard..
4.2.4 Adjusting the Enh Factor
User Adjustments
PPM Level
Filter
Dew Pt Calc
Enh Factor
The
Enhancement (Enh) Factor is used to adjust the calculated Pressure Dew Point
(Equivalent Dew Point) in nitrogen for the effects of pressure.To select whether an enhancement factor is applied to the dew point calculation, from the
User Adjustments
Menu select Enh Factor and press Enter. The following screen appears.
User Adjustments
Enhancement Factor:
OFF ON
The
Enhancement (Enh) Factor can be turned OFF or ON as required.
Use the left or right arrow key to select your choice and press
Enter. The screen returns to the
User Adjustments Menu.
X = Cancel
Note: The Enhancement Factor does not apply when operating in methane/natural gas, as those calculations are designed to be consistent with the methods described in ASTM D-1142.
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Chapter 4. Programming Advanced Features
4.3 Set Up the Background Gas
4.3.1 Selecting the Type of Gas
Beginning with firmware version
H2O.001.C,.the background gas is selectable from the Settings Menu. For normal operation in natural gas service,
Methane should be selected as the background gas. For verification testing, it may be desirable to use
Nitrogen with a known moisture concentration. In this application, Nitrogen should be selected as the background gas.
The
Aurora H
2
O provides a positive indication if it is operating in Nitrogen mode. An
N 2 indicator will appear in the upper right corner of the LCD, adjacent to the status message.
In normal
Methane operation, only the status message is displayed.
Unless otherwise requested, the
Aurora H
2
O is shipped from the factory configured for
Methane operation.
To change the type of background gas, from the
Settings Menu select Gas and press
Enter. The following screen appears.
From the
Gas Data menu, select Background and press Enter. The following screen appears.
Z Factor
Use the arrow keys to select the desired background gas, and press
Enter. The background gas selection is now complete. Press
Cancel to return to the display page.
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Chapter 4. Programming Advanced Features
4.3.2 Setting the Gas Composition
Note: The Gas Composition option is available only if Methane is selected as the Background Gas.
To set the gas composition, from the
Gas Data Menu select Composition and press
Enter. The following screen appears.
Z Factor
The first choice is
STD, the composition of our standard calibration mixture (90.0%
CH4, 6.0% N2 and 4.0% CO2. To set the standard mixture, select
STD and press Enter.
The screen returns to the previous menu.
The second choice is
CH4, a composition of 100.0% Methane (CH4), for use when using bottled gas for verification. To set the Methane composition, select
CH4 and press
Enter. The screen returns to the previous menu.
Note: A third and/or fourth choice is optional, and will appear only if the customer has requested a custom gas composition.
4.3.3 Setting the Z Factor
The Z factor is a number that accounts for the non-ideal compressibility of natural gas, and is vital for accurate calculation of mass/volume (lbs/MMSCF, mg/m
3
).
To set the Z factor, from the
Gas Data Menu, select Z Factor and press enter. The following screen appears.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the
Settings Menu.
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Chapter 4. Programming Advanced Features
4.3.4 Adjusting the Gas Offset
The input information for gas molecular weight is not currently used for any moisture calculations and is reserved for future use.
• lbs/MMSCF is calculated using IGT Research Bulletin #8 and ASTM D-1142-95
referenced at 60°F, 1 ATM.
• mg/cm
3
is based on ideal gas law derivation referenced at 15°C, 1.01325 kPa.
To adjust the gas molecular weight offset, from the
Settings Menu select Gas and press Enter. From the Gas Data menu select
Mol. Weight and press Enter. The following screen appears.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the
Settings Menu.
4.4 Clock Settings
The clock settings are for informational purposes. They are used to keep track of the test analyzer start time and the laser operational time.
To reset the clock, from the
Settings Menu select Clock and press Enter. The following screen appears.
4.4.1 Resetting the Hour
To reset the hour, from the
Clock Menu select Hour and press Enter. The following screen appears.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the
Clock Menu.
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Chapter 4. Programming Advanced Features
4.4.2 Resetting the Minutes
To reset the minutes, from the
Clock Menu select Minutes and press Enter. The following screen appears.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the
Clock Menu.
4.4.3 Resetting the Month
To reset the month, from the
Clock Menu select Month and press Enter. The following screen appears.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the
Clock Menu.
4.4.4 Resetting the Date
To reset the date, from the
Clock Menu select Date and press Enter. The following screen appears.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the
Clock Menu.
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4.4.5 Resetting the Year
To reset the year, from the
Clock Menu select Year and press Enter. The following screen appears.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the
Clock Menu.
4.5 Pressure Settings
To reset the pressure settings, from the
Settings Menu, select Pressure... and press
Enter. The following screen appears.
4.5.1 Setting the Source
To reset the source, from the
Pressure Menu, select Source and press Enter. The following screen appears.
Use the left and right arrow keys to select the line pressure source. To change the constant, select
Constant. Press Enter. The screen returns to the Pressure Menu.
4.5.2 Changing the Constant
If the pressure source selected is
Constant, to reset its value, select Constant from the
Pressure Menu and press Enter. The following screen appears.
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Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the
Pressure Menu.
Note: Data entry for this setting is only in kPa.
55
Chapter 4. Programming Advanced Features
4.5.3 Editing Pressure Calibration
Pressure input in this section is used only for equivalent dew point calculations.
Equivalent dew point is the dew point of the process gas at the process pressure. Input a
“constant” value if the line pressure is at a normal pressure, or use an external pressure transmitter to input a “live” pressure input into the
Aurora H
2
O analyzer.
To edit the pressure calibration, from the
Line Pressure Source Menu, select Live and press
Enter. The following screen appears.
To edit the
Calibration Data, use the arrow keys to select Cal Data and press Enter. The following screen appears.
To select the
Calibration Point, use the up and down arrow keys to highlight Select Cal
Point and press Enter. The following screen appears.
Use the left and right arrow keys to select
Zero or Span and press Enter. The screen returns to the previous menu.
To edit the
Pressure Value, use the up and down arrow keys to select Edit Pressure
Value and press Enter. The following screen appears.
56
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the previous menu.
To edit the
Input Value, use the up and down arrow keys to select Edit Input Value and press
Enter. The following screen appears.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the previous menu.
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Chapter 4. Programming Advanced Features
4.6 Regional Settings
This section enables the setting of regional information, depending on the location of the
Aurora H
2
O.
To reset the regional settings, from the
Settings Menu, select Locale... and press Enter.
The following screen appears.
Note: Locale settings for your order have been set at the factory and are access code protected. If you determine a need to access
Regional Settings, contact the factory for assistance.
4.6.1 Setting the Country Code
To edit the country code, from the
Regional Settings Menu select Country Code and press
Enter. The following screen appears. A passcode is required to make changes.
Use the left and right arrow keys to select each digit to be changed. Use the up and down arrow keys to change the value. When finished, press
Enter. The screen returns to the
Regional Settings Menu.
• Country Codes = international phone country codes.
• Default = 1 for U.S.
• Option = 81 for Japan is available to conform to METI requirements.
4.6.2 Setting the Decimal Format
The
Decimal Format option determines whether a decimal [.] or a comma [,] is used as the decimal separator. To edit the decimal format, from the
Regional Settings Menu select
Decimal Format and press Enter. The following screen appears.
Use the left and right arrow keys to select a decimal [.] or a comma [,] as the decimal separator and press
Enter. The screen returns to the Display Menu.
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Chapter 4. Programming Advanced Features
4.6.3 Setting the Date Format
To edit the date format, from the
Regional Settings Menu select Date Format and press
Enter. The following screen appears.
Use the left and right arrow keys to select the desired date format and press
Enter. The screen returns to the previous display.
4.6.4 Setting the Unit System
To select the unit system to be used for measurements, select
Unit System and press
Enter. The following screen appears.
Use the left and right arrow keys to select the
Unit System desired [SI = metric (only unit types)
, SI + US = metric + English (unit types such as °F, psig, etc.)] and press
Enter. The screen returns to the Regional Settings Menu.
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4.7 User Calibration
Beginning with software revision
H2O.001.F, the Aurora H
2
O supports a two-point User Calibration for use in methane/natural gas. This is provided so that a field calibration can be easily performed to cause the
Aurora H
2
O measurement to correspond to a calibration gas or other moisture device. The
User Calibration is independent from, and does not affect, the
Factory Calibration. The Aurora H
2
O can be quickly switched between User and Factory calibration at any time.
Before the calibration can be performed, the
Aurora H
2 methane selected as the
Background Gas.
O must be operating correctly in methane or natural gas, with
Choose
Settings... from the Main Menu. A User Cal... selection is now provided.
Note:If the Aurora H
2
O is set for Nitrogen as the background gas, the User Cal selection will be disabled/grayed out.
The
Aurora H
2
O will prompt for the User Passcode [ 2 7 1 9 ]
By default, the
Aurora H
2
O is operating with the Factory calibration, so the User
Calibration Menu is disabled with the exception of the Status selection.
Select
Status, and choose User as the Active Calibration.
The
User Calibration Menu will now be enabled.
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Chapter 4. Programming Advanced Features
4.7 User Calibration (cont.)
The selections on the
User Calibration Menu include these functions:
Item
Zero Gas
Span Gas
Purpose
User specifies the water concentration, in PPMv, of the "Zero", or dry gas.
Read Zero
User specifies the water concentration, in PPMv, of the "Span", or Cal/Wet gas.
The
Aurora H
2
O will read the signal while exposed to the Zero gas.
Read Span
The
Aurora H
2
O will read the signal while exposed to the Span gas, then determine the CH4 Offset
and Scalar calibration values.
CH4 Offset
Permits the user to view/edit the calculated offset term.
CH4 Scalar
Permits the user to view/edit the calculated scalar (gain) term.
First select the
Zero Gas and Span Gas items, to specify the cal gases to be used. The zero gas must be in the range of 0.0 to 50.0 PPMv water. It is recommended that the zero gas be 10.0 PPMv or higher for best results. The Span gas must be in the range of
0.0 to 5000.0 PPMv water. It is recommended that the Span gas be 500.0 PPMv or lower for best performance.
Apply the
Zero gas, and wait for the Aurora H
2
O reading to stabilize.
Note:The user can exit to the display and return to the User Cal Menu without affecting the Calibration procedure.
When the reading is stable, select
Read Zero. The Aurora H
2
O performs multiple measurements for approximately 15 seconds, indicating its progress. When the readings are complete, you will be prompted to apply the span gas, and continue. If there is doubt about the stability of the zero gas, the reading can be repeated at this point.
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Chapter 4. Programming Advanced Features
4.7 User Calibration (cont.)
Apply the Span gas, and wait for the
Aurora H
2
O reading to stabilize.
When the reading is stable, select
Read Span. The Aurora H
2
O uses the current measurement, and immediately calculates the new calibration. If the calculated values are determined to be valid, the
Aurora H
2
O will display
“Calibration OK” and prompt you to Save the results, or Cancel. If the values are not valid, the Aurora will display
“Calibration *FAILED*", and prompt you to continue. On a cal failure or Cancel, no change is made to the User
Calibration values.
The
CH4 Offset and CH4 Scalar items can be used to view or modify the calculated calibration points, if desired.
Note: The default values for the CH4 Offset is 0.0 and the CH4 Scalar is 1.0. These defaults are NOT the same as the
Factory Calibration! Making the User Cal active without performing the actual calibration will adversely affect the accuracy of the
Aurora H
2
O. If there is any doubt about the quality/accuracy of the gases used, the Aurora H
2
O should be returned to the
Factory calibration using the Status item.
4.8 Service Settings
The Service Settings Menu should be used by factory-trained personnel only.
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4.9 Aurora H
2
O Information
To check
Aurora H
2
O information, from the Main Menu select About and press Enter.
The following screen appears.
4.9.1 Checking the ID
To check identification information, select
ID and press Enter. A screen similar to the following appears.
Gas Composition
To return to the
About Menu, press Enter.
4.9.2 Checking the System Status
To view the status of the
Aurora H
2
O system, from the About Menu select System
Status and press Enter. A screen similar to the following appears.
Gas Composition
Uptime: is the elapsed time since the
Aurora H
2
O was powered on or reset.
Started: is the date and time that the
Aurora H
2
O was last powered on/reset.
Start Temp: is the laser housing temperature as measured at the last startup/reset.
Laser Hours: indicates the total lifetime that the laser has been energized.
To return to the
About Menu, press Enter.
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Chapter 4. Programming Advanced Features
4.9.3 Checking the Software
To view the software versions being used, from the
About Menu select Software
Versions and press Enter. A screen similar to the following appears.
Gas Composition
To return to the
About Menu, press Enter.
4.9.4 Checking the Gas Composition
To view the gas content, from the
About Menu select Gas Composition and press
Enter. A screen similar to the following appears.
To return to the
About Menu, press Enter.
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Chapter 4. Programming Advanced Features
4.9.5 Checking the Alternate Gas Composition
The
Aurora H
2
O TDLAS is normally calibrated to a standard gas mixture that is representative of “typical” natural gas.
The primary components and concentrations of this gas mixture are:
Component
Methane (CH4)
Nitrogen (N
2
)
Carbon Dioxide (CO
2
)
Concentration
90.0%
6.0%
4.0%
For special applications, where the composition of the gas to be measured differs significantly from the standard, GE can provide an alternate calibration. If this service has been ordered, the
Aurora H
2
O will be shipped from the factory with both the standard and a custom calibration installed.
The calibration in use can be verified at any time using the
Aurora H
2
O About… menu.
From the
Main Menu, select About and press Enter. The following screen appears.
From the
About Aurora menu, select Gas Composition and press Enter. The following screen appears.
An identifier label for the gas composition will be displayed above the components:
Gas Composition Identifier
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Chapter 4. Programming Advanced Features
4.10Custom Gas Composition
If a custom Gas Composition has been installed, an additional
Composition menu selection will appear in the
Settings/Gas Data menu.
Note: If no alternate composition is available, the menu selection will be disabled and “grayed out”.
Gas Composition Identifier
The new composition can be verified by selecting
About… Gas Composition:
Note: Unless otherwise requested, the Aurora H
2
O is shipped from the factory configured to use the custom gas composition.
4.11 Locking/Unlocking the Display
To lock the
Aurora H
2
O against any future changes, from the Main Menu select Lock and press
Enter. The screen returns to the standard display.
Note: This menu option is the same as exiting the programming menu and waiting for a keypad time-out to lock the keypad.
To unlock the
Aurora H
2
O for changes, press Cancel, Enter, Cancel as instructed in
Unlocking the Keypad on page 35.
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Chapter 5. AuroraView Interface Software
Chapter 5. AuroraView Interface Software
5.1 Capabilities
Your
Aurora H
2
O Analyzer is shipped with a CD which includes a PC-Software Application called AuroraView. With
AuroraView, you can:
•
View
Aurora H
2
O Configuration Items Like Alarms & Outputs.
• DataLog data to a comma delimited .txt file, that can be opened by spreadsheet applications like MicroSoft Excel.
• Plot real-time data for one or more
Aurora H
2
O parameters
• Manipulate plotted data in a variety of ways: color, line type, zoom in/out, etc.
• Trend tabular data in real-time.
• Show Scan Plots of the moisture absorption spectra.
• Copy plots from
AuroraView to other Window applications like Microsoft Powerpoint or Word.
AuroraView does not provide functionality for the following:
• Aurora H
2
O Software Updates.
• Save the
Aurora H
2
O Configuration. The Aurora H
2
O is designed in a robust manner where the meter should recover from fault conditions without the need to upload the configuration of the meter using external software.
5.2 Requirements
AuroraView leverages a National Instruments Run-Time environment. This environment is supported on the following operating systems with the necessary requirement minimum installation requirements:
• 260Mb of available hard disk space
• 64Mb Ram or more
• 300 MHz Pentium CPU
• Windows NT 4.0 SP6 or higher, Windows ME, Windows 2000, Windows XP
• Internet Explorer v5.0 or higher
AuroraView supports the following interfaces:
• RS232
• RS485 Modbus
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Chapter 5. AuroraView Interface Software
5.3 Installing AuroraView
1. Install the Installation CD in your PC.
2. The Installation program should auto-run. If it does not, select
Start Run Browse.
Figure 41: Initial Screen
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Chapter 5. AuroraView Interface Software
5.3 Installing AuroraView (cont.)
3. Browse to the file named “setup.exe” in the root directory. Click
Open and then OK to start the setup file.
Figure 42: AuroraView Installer
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Chapter 5. AuroraView Interface Software
5.3 Installing AuroraView (cont.)
4. Exit all other programs before running the installer.
Figure 43: Installation Recommendation
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Chapter 5. AuroraView Interface Software
5.3 Installing AuroraView (cont.)
5. The next screen provides the opportunity to change installation locations if necessary. When complete, click Next.
Figure 44: Destination Directory
6. The next screen shows the Software License Agreement. Select “I accept the License Agreement” and click Next.
Aurora H
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Figure 45: Software License Agreement
67
Chapter 5. AuroraView Interface Software
5.3 Installing AuroraView (cont.)
7. The next screen gives instructions to initiate the installation. When complete, click
Next. The installation begins.
Figure 46: Starting Installation
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5.3 Installing AuroraView (cont.)
Chapter 5. AuroraView Interface Software
Figure 47: Overall Progress
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Chapter 5. AuroraView Interface Software
5.3 Installing AuroraView (cont.)
8. The following screen appears when the installation is complete.
Figure 48: Installation Complete
70 Aurora H
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5.4 Starting AuroraView
1. From the
Start menu, click Programs AuroraView AuroraView.
Chapter 5. AuroraView Interface Software
Aurora H
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Figure 49: AuroraView in Programs Menu
71
Chapter 5. AuroraView Interface Software
5.4 Starting AuroraView (cont.)
2.
AuroraView will boot up and display a screen similar to Figure 50.
Trend Plots Tab
Command Line
Scan Plots Tab
Trend Tabular Data Tab
Alarms Status
Reading
Interval
Datalog
Interval
Current Readings
Pane
Figure 50: AuroraView Main Screen
72 Aurora H
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5.5 Using the Main Menus
1. Click
Measurements Config
Chapter 5. AuroraView Interface Software
Figure 51: Configuration Measurements
• Unit String: Set this value to the value you want to read, plot or datalog.
• Digits of Precision: Set a numerical value (typically 0, 1, 2). This sets the resolution of the displayed measurement units to the right of the decimal place (i.e. "20.78" would be a setting of 2).
• Read: Check this box if you want to show the value in the current Readings pane.
• Plot: Check this box if you want to show the value in the Trend Plots graph AND the Trend Tabular Data tab.
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Chapter 5. AuroraView Interface Software
5.5 Using the Main Menus (cont.)
Note: The other options under MEASUREMENTS are for individual unit types and perform the same function as checking a box under the CONFIG pop-up window.
Figure 52: Other Measurement Options
2. Click
Alarms Config
This window enables the user to configure the alarm status within the
AuroraView application. This feature allows you to remotely configure
Aurora H
2
O's alarms, which are used only with Modbus RTU digital output. The AuroraView
Alarms are shown below.
Figure 53: Alarms Configuration
74
Set Alarm Trigger drop-down
Toggle Alarms
ON/OFF
Alarm Type:
Set Point,
Out of Band,
In Band
Limits
Figure 54: Other Measurements Options
Alarm “Read”
Indication
(see below)
Datalog
Alarm
Condition
On/Off
Figure 55: Alarm Status Indicators
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5.5 Using the Main Menus (cont.)
3. Click
Outputs Config
Figure 56: Outputs Configuration
Chapter 5. AuroraView Interface Software
Set Output Parameter
Set Output Type
0-20mA or 4-20mA
Figure 57: Other Output Options
Set Zero or Lower Range;
Set Span or Upper Range
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Chapter 5. AuroraView Interface Software
5.5 Using the Main Menus (cont.)
4. Click
Scan
This section will enable you to pick the type of scan you want to see. The default scan is the
SPECTRA scan, which shows the 2f spectral scan. This is the processed signal waveform that the
Aurora H
2
O Analyzer uses to determine the moisture concentration. Viewing this scan may be helpful in certain troubleshooting situations. A typical 2f spectra
which
AuroraView updates the scan plot. To enter a scan interval, click on the Click to Save Scans Periodically button, and the following screen appears. Enter the interval and click on
Continue to save or Cancel to reject the change.
Figure 58: Save Scans Periodically
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5.5 Using the Main Menus (cont.)
Chapter 5. AuroraView Interface Software
Figure 59: Scan Plot Tab
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Chapter 5. AuroraView Interface Software
5.5 Using the Main Menus (cont.)
5. Click
Comms
This window enables you to configure communication options. If you have more than one
Aurora H
2
O on your network, you will have to establish different NETWORK ID's for each analyzer using the main keypad on the
Aurora
H
2
O. For your PC system, you will have to select which comm port to use. This is typically COM1. The default baud rate is 115200 baud.
Figure 60: Configure Communication Options
6. Click
Help
This screen indicates the revision level of
AuroraView.
78
Figure 61: Software Information
Aurora H
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5.6 Datalogging with AuroraView
1. In the main view, click on the button
Click to Datalog.
Chapter 5. AuroraView Interface Software
Figure 62: Dataloging with AuroraView
2.
AuroraView will request a file location. Pick a file location and a file name to save your data log file. All data log files are comma delimited .txt files by default.
3. Once you pick a file location,
AuroraView will write any parameter that has a check box with Datalog checked in the main
Config window at the time interval set in the Datalog Interval box, and the button in the main window will change to
Datalogging…Click to Stop.
4. When you are done datalogging, click the button to stop logging. You may now open your .txt datalog file in any application, such as Microsoft Excel, so that you can analyze that data.
Note: When datalogging multiple parameters at intervals of five seconds or less, it is recommended to use baud rates of 57.6K or 115.2K.
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Chapter 5. AuroraView Interface Software
5.7 Working with Trend Plots, Trend Tabular Data & Scan Plots
1. Trend Plots is a powerful graphing feature in
AuroraView. You can graph many parameters at the same time.
Clear Trend Data Button
Graph Window Width
Graph Tools
Current parameters being trended legend
Secondary Y-axis
Example
Figure 63: Using Trend Plots
Note: If you use the secondary y-axis, you may see “–” tick marks preceding the value. These are tick marks from the graphical applet and not an indication of negative values.
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Chapter 5. AuroraView Interface Software
5.7 Working with Trend Plots, Trend Tabular Data & Scan Plots (cont.)
2. If you right-click on any series of data within the graph, or you click on the current parameter being-trended item in the legend, you will see a variety of options for graphing data. You can change to a variety of common plots and adjust color, line style, and line width. For some data sets with lots of finite points, you may want to click
Anti-Aliased which will smooth the plot line. You can also change bar plots, fill base line, interpolation and point style.
X-Scale adjusts the x-scale. Y-Scale adjusts the y-scale and enables the secondary y-axis.
Figure 64: Options for Graphing Data
3. There is a series of
Graph Tools available at the top left of the trend plot area.
Figure 65: Graph Tools
• Pointer
•
Zoom Tool - gives you six options as shown in Figure 66.
Zoom X-axis
Zoom window
Zoom all
Zoom Y-axis
Zoom in
Zoom out
Figure 66: Zoom Tool
• Hand Tool - Enables you to graph the trend plot area and move it around without rescaling.
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Chapter 5. AuroraView Interface Software
5.7 Working with Trend Plots, Trend Tabular Data & Scan Plots (cont.)
4. Copying and Pasting a Trend Plot can be done from
AuroraView. One way to do this quickly is to simply right click over the data area and choose
Copy. In another application, like Microsoft Word, simply paste.
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Figure 67: Copying a Trend Plot
82
Figure 68: Pasting a Trend Plot
Aurora H
2
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Chapter 5. AuroraView Interface Software
5.7 Working with Trend Plots, Trend Tabular Data & Scan Plots (cont.)
Another option is to right-click and chose the option
Export Simplified Image. When you do this, a variety of image file formats will appear. A good universal option is
Enhanced Metafile. Pasting an enhanced metafile will give you the ability to paste an image with an inverted color scheme as shown in the second example posted into Word (see
Aurora H
2
O User’s Manual
Figure 69: Exporting a Simplified Image
83
Chapter 5. AuroraView Interface Software
5.7 Working with Trend Plots, Trend Tabular Data & Scan Plots (cont.)
Figure 70: Selecting Enhanced Metafile
84
Figure 71: Pasting an Enhanced Metafile
Aurora H
2
O User’s Manual
Chapter 5. AuroraView Interface Software
5.7 Working with Trend Plots, Trend Tabular Data & Scan Plots (cont.)
Working with
column widths to see data more easily with full titles in the header row.
Aurora H
2
O User’s Manual
Figure 72: Trend Data in Tabular Format
85
Chapter 5. AuroraView Interface Software
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86 Aurora H
2
O User’s Manual
Chapter 4. Programming Advanced Features
Main Menu
Primary ppmv mg/m
Alt 1
3
Pw, kPa
Dew Pt °C
Dew Pt °F
Eq DP °C
Eq DP °F
Alt 2
ESC = Cancel
1 decimals
ENT = Save
ESC = Cancel
Sample
Temp °C
Temp °F
Temp K
Dew Pt °C
Dew Pt °F
Note: The selection of "English" or non-metric measurements is dependent on the Regional
Settings from the LOCALE menu. The unit system choices are SI (from the French Le
Systeme International d'Unites), commonly referred to as the "metric" system, or SI+US.
SI
Measurement Units
Hygro Temp
DP °C, Eq. DP °C, mg/m , PPMv, Pw kPa
T °C, DP °C
SI+US
Alt 2
Hygro
ESC = Cancel ppmv mg/m 3
Pw, kPa
Dew Pt °C
Dew Pt °F
Eq DP °C
Eq DP °F
Display
Decimal
Set Decimal for:
Eq. DP °F, Lbs/MMSF
Primary
Temp
Alt 1
T °F, DP °F
Adjust
Press
Line kPa mPa bci kg/cm mmHg
PSIa
PSIg
2
Reverse
Pressure
Bar, kg/cm
All SI units plus:
PSIa, PSIg
Outputs
Select
Select Output:
A
B
C
ESC = Cancel
Units
Select Unit Type:
Type
Hygro
Temp
Press
Select Output Type:
4-20 mA
0-20 mA
Set Output A, B or C:
Upper Span
Lower Zero i.e. 00250.0 PPMv
Set Output A, B or C
Test
Test Value i.e. ±050.00 %
Set Output A, B or C
Trim...
Reset Trim
Trim Zero
Trim Span
Alarm Settings Service
Factory-trained personnel only
Select
Select Output:
A
B
ESC = Cancel
Status
Set Alarm Status
Units
ON
Select Unit Type:
Hygro
Type
C
OFF
Temp
Press
Select Alarm Type:
Setpoint
In Band
Out Band
Enter A, B or C
Upper
Min/Max
Alarm Value
Lower i.e. ± 000.0 Td °C
Comms...
Comm Port:
Select
Select Comm Port
SCADA / Service
Baud Rate
Adjust
Adjust Offset Values: ppm Level
Filter
Smoothing Filter: i.e. 200 Samples
115.2 k
57.6 k
38.4 k
19.2 k
Parity
Protocol
Set
Parity
EVEN
ODD
NONE
Select
Protocol
RS-232
RS-485
Network ID
Set Node ID: i.e. 001
Timing
9600
4800
2400
1200
Select
Mode
Strict
Relaxed
Dew Dew Frost
Gas
Hour
Clock
Set Clock:
Minutes
Month
Date
Year
Set Hour [0-23]:
Set Minutes [0-59]:
Set Month [1-12]:
Set Date:
Set Year:
Set
Molecular
Weight
Background
Select
Background
Gas
Nitrogen
Pressure
Pressure Settings
Source
Select Pressure Source:
Constant
Constant
Live
Enter Line Pressure: i.e. ± 0101.325 kPa
Methane
Cal Data
Edit Pressure Cal:
Composition
Select
Composition
Identifier
STD
Select Cal Point
Select Calibration Point:
Zero
Span
CH4
Z Factor
Edit Pressure Value
Enter Line Pressure: i.e. 0000.0000 kPa
Edit Input Value
Enter Line Signal: i.e. 0001.000 mA
About Lock
Lock Display
About Aurora:
ID
GE Copyright, etc.
Unit SN:
Sensor SN:
System Status
Uptime: i.e. 0 d 00 h
Laser Hours: i.e. 85
BOOT:
PROG:
Standard
Methane
User Calibration
Locale
Status
Factory
User
Passcode Protected
Regional Settings
Date Format
Unit System
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Chapter 4. Programming Advanced Features
88
Chapter 6. Maintenance
Chapter 6. Maintenance
6.1 Spare Parts
Table 2: Aurora H
2
O Spare Parts List
Part No.
Description
704-688-12 RS-232 Cable; SUB-9-F to Tinned Leads; 12 ft.
N/A
Aurora H
2
O Maintenance Kit
Plastic Case with Foam Inserts
421-3230 Magnetic Stylus
240-199 Air Blower
403-161
463-030
240-201
240-200
Lens Tissue Package
Replacement Membrane Filter Elements
Allen Wrench, 5/32”
Allen Wrench, 3/32”
S40046393 Small Screw Driver
403-163 Gloves
Qty.
1
1
1
1
5
1
4
1
1
1
CAUTION! CLASS 1M INVISIBLE LASER RADIATION WHEN OPEN. DO NOT VIEW DIRECTLY WITH
OPTICAL INSTRUMENTS.
WARNING! Use of controls or adjustments or performance of procedures other than those specified herein may result in radiation exposure that is more hazardous than specified.
6.2 Recommended Factory Verification Period
Aurora H
2
O technology is designed for long life without calibration. There are no wetted sensing surfaces, which might degrade over time due to direct sample gas contamination. The optical components are designed to be stable over the span of many years. GE recommends that
Aurora H
2
O analyzers may be returned to the factory for verification on a five (5) year periodic basis. GE will inspect, clean, replace filter elements and calibrate the unit to traceable standards as part of the factory service for
Aurora H
2
O analyzers.
6.3 Cleaning the Mirror
The
Aurora H
2
O analyzer may provide the message Weak Signal Return - Check Mirror on the top line of the display, along with the red light “!” to the left of the main display. If this occurs, the mirror and/or the optical window of the measuring cell may be contaminated due to liquid or particulate coating/deposition.
Note: Reagent grade Acetone (Cas no. 67-64-1) may be needed for the cleaning process. The reagent is not supplied as part of the Aurora maintenance kit. Obtain the reagent from a local chemical supplier.
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2
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Chapter 6. Maintenance
6.3 Cleaning the Mirror (cont.)
If the error condition
Check Mirror is indicated, the first step is to clean the mirror. The process is as follows:
1. Turn the power to the
Aurora H
2
O off.
CAUTION! CLASS 1M INVISIBLE LASER RATIATION WHEN OPEN. DO NOT VIEW DIRECTLY WITH
OPTICAL INSTRUMENTS.
WARNING! Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous laser exposure.
2. Shut down the flow through the measuring cell.
b. Ensure that the sample flow rotatmeter indicates zero flow.
3. Wear a pair of disposable latex gloves.
Note: A 5/32 inch allen wrench is required to accomplish this task.
task. Hold the stainless steel base of the mirror with one hand while removing the last retaining bolts. The mirror is removed straight down. There is one alignment pin which will facilitate proper removal.
Alignment Pin Slot
90
Figure 74: Removing the Aurora H
2
O Mirror
Aurora H
2
O User’s Manual
Chapter 6. Maintenance
6.3 Cleaning the Mirror (cont.)
CAUTION!
Handle the mirror with extreme care. Performance of the analyzer is dependent upon the mirror integrity. Do not touch the mirror surface with any tools, objects or hands/fingers.
Alignment Pin
Mirror
Figure 75: Handling the Mirror Assembly
5. Make a visual inspection of the mirror surface. Record any observation of gross contamination. If the mirror appears to be clean, do not clean it. Instead, reinstall it into the system.
Aurora H
2
O User’s Manual
Figure 76: Examining the Mirror
91
Chapter 6. Maintenance
6.3 Cleaning the Mirror (cont.)
6. If the mirror is contaminated, the first step in cleaning it is to use the air blower to blow away any particulate matter on the mirror surface. Place the mirror assembly on a flat surface and repeatedly puff the air blower to force dry
clean air onto the mirror surface (see Figure 77).
Figure 77: Blowing Air onto the Mirror
7. Using a piece of lens tissue, wet a small area with a very small amount of Analytical Grade Acetone. (Barely wet the lens tissue. Typically, one drop of Acetone will suffice.) Tilt the lens tissue so that the acetone drop is absorbed
by the lens paper along the length of the piece (see Figure 78).
Figure 78: Using Analytical Grade Acetone
92 Aurora H
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Chapter 6. Maintenance
6.3 Cleaning the Mirror (cont.)
8. Place the wet lens tissue on top of the mirror and drag it horizontally across the surface of the mirror (see
Figure 79: Dragging the Wet Lens Tissue Across the Mirror
9. Use the air blower to blow dry air onto the surface of the mirror. Puff repeatedly until the mirror surface appears
Figure 80: Drying the Mirror
10. Repeat steps
7-9 at least three times. Each time, use a new lens tissue.
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2
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Chapter 6. Maintenance
6.3 Cleaning the Mirror (cont.)
11. Visually inspect the mirror. Record any observation of gross contamination.
12. If the mirror does not appear to be clean, contact the factory for further assistance.
13. If the mirror appears to be clean, re-install it onto the measurement cell.
14. As you line up the mirror to the measurement cell, note the “key” for properly connecting the two pieces. The mirror will align in only one position for mounting. Rotate the mirror assembly to line up the alignment pin with
the alignment pin slot (see Figure 81).
Alignment Pin Slot
Figure 81: Reinstalling the Mirror Assembly
15. Reinstall the six retaining bolts.
16. Tighten the six bolts in a star pattern. Hand tighten to achieve integral metal-to-metal contact.
17. Re-establish power to the
Aurora H
2
O analyzer.
18. Re-establish the flow through the sample system.
19. If the
Aurora H
2
O still indicates a Check Mirror, contact the factory for further assistance.
94 Aurora H
2
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Chapter 6. Maintenance
6.4 Replacing the Filter Element
The Aurora uses a membrane filter as the secondary filter. This filter is intended to prevent liquid or particulate contamination from entering the absorption cell.
The Aurora should not be operated without a filter train upstream of the unit.
The membrane filter is equipped with “Flow Block” which shuts off the flow if the filter element is heavily loaded with contamination. A spring loaded check valve closes the outlet flow of the sample if the differential pressure across the filter element exceeds a threshold limit. At any given time the flow through the
Aurora can be checked by observing the rotameter. If the “flow block” feature shuts off the flow, do not increase the pressure. Replace the filter element and clean the filter.
If the flow is being shut off too frequently, additional sample condition schemes, or the combination of the following, will have to be employed.
• Bypass flow - needed to sweep liquids or contamination off the filter. A 10:1 bypass flow rate should be maintained.
• Additional upstream filtration
• Heat – Heat tracing of the sample line and sample system components, sufficiently above both the water and hydrocarbon dew point, will keep the sample in gas phase.
1. Close the inlet isolation ball valve and allow the system to fully depressurize.
2. Turn the filter cap counter-clockwise. You might need to use a channel-lock wrench to assist in loosening the cap.
Aurora H
2
O User’s Manual
Figure 82: Removing the Filter Cap
95
Chapter 6. Maintenance
6.4 Replacing the Filter Element (cont.)
3. Place the filter cap on a horizontal flat surface, filter side up.
4. Carefully remove the large O-ring.
Note: The O-rings are reused. Replacement O-rings are not included in the maintenance kit.
Figure 83: Orient the Filter Cap and Remove the Large O-Ring
5. Remove the white membrane filter element and the membrane backing plate.
96
Figure 84: Remove the White Filter Element and the Backing Plate
Aurora H
2
O User’s Manual
Chapter 6. Maintenance
6.4 Replacing the Filter Element (cont.)
6. Remove the small O-ring.
Figure 85: Remove the Small O-ring
7. Using a tissue, clean the filter components.
Large O-Ring
Membrane Filter
Backing Plate
Small O-Ring
Figure 86: O-Rings, Membrane Filter and Backing Plate Removed
8. Re-assemble the filter. Reinstall the cap hand–tight.
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2
O User’s Manual 97
Chapter 6. Maintenance
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98 Aurora H
2
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Chapter 7. Troubleshooting
Chapter 7. Troubleshooting
7.1 Introduction
The following are possible
Aurora H
2
O analyzer conditions with details on how to deal with them.
7.2 Blank Display
1. Is the green POWER LED lit?
a. Yes - proceed to
2.
b. No - Check wiring and fuse
2. Are the four arrow keys illuminated?
a. Yes - If the keys remain illuminated for more than 12 seconds, the Boot Loader cannot find a valid Instrument
Program to run.
b. No - contact the factory for service.
7.3 Display Dim or Hard to Read
1. Adjust the LCD brightness and contrast using the Display/Adjust menu.
7.4 Status Messages and Indicators
1. The
Aurora H
2
O categorizes status messages as either Faults, Warnings, or Information. Status messages are displayed in the upper right corner of the display. Messages that are longer than the message area continuously scroll from right to left.
2. A fault is a non-recoverable condition that can affect the quality of measurement by the
Aurora H
2
O. Fault messages are accompanied by a slow flashing ( ! ) indicator.
3. A warning is a recoverable condition that can affect the quality of measurement by the
Aurora H
2
O. Warning messages are accompanied by a rapid flashing ( ! ) indicator.
4. Information messages alert the operator to a condition that is abnormal, but does not affect the quality of measurements. Info messages are accompanied by a slow flashing (
i ) indicator.
5.
Aurora H
2
O fault and status messages are prioritized; in case of more than one fault/status condition, the condition with the highest priority will be displayed. When that condition is resolved, the next highest priority condition will display.
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2
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Chapter 7. Troubleshooting
7.4 Status Messages and Indicators (cont.)
Message
Status OK
No CH4 detected
H2O Under Range
Warning - System
Overheating
FAULT: Temperature
FAULT: Sample
Pressure
FAULT: Line
Pressure
Laser Temp
Unstable...
Laser Adjust at
Limits
Laser Reference
Fail
Weak Signal Return
- Check Mirror
FAULT: TEC FAIL
WARNING - Sample
Pressure TOO HIGH
ERROR: TEC Setpoint out of Range
Service Req: ###
Table 3: Status Messages and Indicators
Condition Description
Info Aurora H
2
O is operating normally, no faults or other indications.
Info
Info
Aurora H
2
O is reading moisture, but cannot detect the presence of methane.
The moisture level is below the system detection limits.
Fault
The temperature inside the electronics module exceeds 85°C or the air temperature inside the sample system enclosure exceeds 68°C. The laser is powered off until the electronics module temperature is below
80°C, and the sample system enclosure temperature is below 65°C.
Fault
Fault
The temperature transducer is operating out of limits, is disconnected, or has failed.
The internal (sample) pressure transducer is operating out of limits, is disconnected, or has failed.
Fault
Warning
Warning
Info
Fault
Info
Fault
Fault
Fault
The external (line) pressure transmitter is operating out of limits, is disconnected, or has failed. Occurs if source of the line pressure measurement is set to "Live", and no pressure transmitter is attached.
The temperature of the laser is not stable. This warning occurs briefly at power on, as the
Aurora H
2
O sets the correct operating temperature.
The laser is powered off until the temperature has stabilized.
Aurora H
2
O has reached the limit for adjusting the laser power.
Contact the factory for assistance.
Aurora H
2
O could not detect any signal from the laser. Contact the factory for assistance.
Aurora H
2
O could not detect a signal returned from the sample cell, or the signal is below allowed limits. Check mirror for contamination.
Aurora H
2
O has detected a failure in the laser temperature control.
Contact the factory for assistance.
The pressure in the
Aurora H
2
O sample cell is greater than 212 kPa
(30.75 psia). Verify regulator and flow settings; check for blocked vent line or excessive back pressure.
The
Aurora H
2
O temperature controller is was set beyond its operating limits. Contact the factory for assistance.
Aurora H
2
O has detected a fault condition that has no associated status message. Contact the factory for assistance.
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Chapter 7. Troubleshooting
7.5 No Flow Measurement Indicated on Aurora H
2
O Measurement Cell Outlet
Check to make sure that the outlet of the
Aurora H
2
O is venting to atmospheric pressure. Ensure that the sample system valves are configured correctly and that the
Aurora H
2
O internal pressure regulator is capable of a barely positive pressure setting. Check/Replace the filter element in the coalescer/filter as detailed in Chapter 5, Maintenance.
7.6 Verifying Aurora H
2
O Performance in the Field
There are two methods for verifying the performance of the
Aurora H
2
O in the field. The first method is to use a portable hygrometer such as GE's PM880 portable hygrometer. The second method is to use a moisture generator or gas standard cylinder.
7.6.1 Using A Portable Hygrometer
One quick spot check that can be done, that is relatively easy to do and requires minimal set-up time and no consumables, is to use a second hygrometer. GE recommends using a PM880 Portable Hygrometer for this requirement with a recently calibrated Aluminum Oxide Moisture Probe.
Figure 87: PM880 Portable Hygrometer
The PM880 can be hooked up to the outlet of the
Aurora H
2
O analyzer, using the portable sample system with the aluminum oxide moisture probe, and verify the system. The response time of the portable hygrometer is limited, as the sensor is typically exposed to air during movement to the sample point, so it is recommended to leave the sample gas flowing through the portable sample system on the sample outlet of the
Aurora H
2
O for a period of time until it reaches equilibrium with the moisture concentration of the sample gas. You can use the data-logging capability in the PM880 to determine steady-state conditions. Consult GE if you have application questions regarding this process.
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Chapter 7. Troubleshooting
7.6.2 Using a Moisture Standard
The best moisture standard to use is one generated by a moisture generator as a flowing reference, due to the fact that static moisture standards in cylinders have limited capability and reliability. A moisture generator such as GE's MG101 moisture generator could be used.
Figure 88: MG101 Moisture Generator
However, a moisture generator is typically used only in an indoor location with reasonably good temperature control.
In the field this is not always practical, so a more convenient option would be to use a moisture standard in a cylinder.
Consult with your local specialty gas supplier about standards for moisture. Based on application experience, GE recommends the following guidelines regarding moisture standards in cylinders
• Use passivated, aluminum cylinders only.
• Do not use when pressure falls below 50% of original pressure supplied by the vendor (typically 1500-1800psig).
• Use for moisture values 50–100PPM.
• Moisture standard in a background of nitrogen (N2).
• Mix the moisture standard for 10 minutes prior to use, following the manufacturer's guidelines (rolling typically).
• Use at the nominal temperature at which the cylinder was tested by the manufacturer.
Whether using a moisture generator or a moisture standard cylinder, the source gas can be connected to the
Aurora
H
2
O using the PURGE INLET on the analyzer. Ensure the sample gas pressure is regulated to just barely positive pressure and establish gas flow from the PURGE INLET to the
Aurora H
2
O measurement cell.
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Chapter 7. Troubleshooting
7.7 Background Selection Lockout
To prevent accidental selection or tampering, the Background selection can be disabled using a mechanical switch located behind the
Aurora H
2
O display. Access to the switch requires removal of the cover, and should be performed only in the absence of hazardous conditions.
Note: Unless otherwise requested, the Aurora/H2O is shipped from the factory with the Background Selection
unlocked.
The Lockout switch is positioned to the right of the Laser Indicator (see Figure 89).
When the switch is in the UP position, the Background Selection menu is
unlocked. When the switch is in the DOWN position, the Background Selection menu is
locked.
Background Selection
Lockout Switch
(shown in unlocked position)
Figure 89: Background Selection Lockout Switch Location
Attempting to access the
Background Gas Selection menu with the switch in the Locked Out (down) position will result in the following message displayed:
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2
O User’s Manual 103
Chapter 7. Troubleshooting
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104 Aurora H
2
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Appendix A. MODBUS RTU / RS485 Communications
Appendix A. MODBUS RTU / RS485 Communications
The
Aurora H
2
O supports digital communications using the Modbus/RTU protocol, with 2-wire RS-485 or 3-wire
RS-232C as the physical layer. Data rate can be specified from 1200 to 115200 bits per second (bps), with selectable parity.
Aurora H
2
O has two physically separate communications ports. Both ports can be selected for either RS-232 or
RS-485 operation.
Aurora H
2
O can communicate with both ports simultaneously.
Aurora H
2
O supports the Modbus/RTU protocol as defined in:
MODBUS Application Protocol Specification, V1.1b
&
MODBUS over Serial Line Specification and Implementation Guide V1.02.
These specifications are available from the Modbus Organization at http://modbus-ida.org/
The functions supported by
Aurora H
2
O are:
(0x03) Read Holding Registers
(0x04) Read Input Registers
(0x08) Diagnostics (Serial Line only) - only supports Echo subcommand
(0x10) Write Multiple registers
(0x11) Report Slave ID (Serial Line only)
(0x2B/0x0E) Read Device Identification - only supports Basic Device Identification tags, which are:
• VendorName
• Product code
• Revision number
Aurora H
2
O supports data types of Integer and Double/Float. Integers are always four (4) bytes and should be read with request for two registers (two bytes per each register, two registers total) at the address. Double/Float type will provide eight (8) byte double precision data or four (4) byte single precision data. This depends on how many registers are requested; four registers for double, two registers for single precision reading.
All registers denoted with a bullet (•) in the Read-Only column are read-only registers and should be read with function
“Read Input Registers.” All other registers can be read and written with “Read Holding Registers” or “Write Multiple
Registers.”
Table 4 on page 106 is the Modbus Register Address map supported by
Aurora H
2
O.
Aurora H
2
O User’s Manual 105
Appendix A. MODBUS RTU / RS485 Communications
Table 4: Modbus Register Map
Function Parameter
System
Status 1
Status Register
Status Register,
Latched
Write 0 to clear
Output 1
Trim Sequence Start/Resume Live Output
2
Units
Type
Trim Reading Zero
Trim Reading Span
Upper of Value
Lower of Value
Test
Analog
Output Output 2
Output 3
Trim Sequence Start/Resume Live Output
2
Units
Type
Trim Reading Zero
Trim Reading Span
Upper of Value
Lower of Value
Test
Trim Sequence Start/Resume Live Output 2
Units
Type
Trim Reading Zero
Trim Reading Span
Upper of Value
Lower of Value
Test
All Alarm Status
Alarm
Alarm 1
Status
Switch
Units
Type
Range/State
Upper
Lower
Addr Data Type
0 Integer
Read
Only
•
1000 Integer
2100
Reg. address of Meas.
2110
Integer
Integer
0 = 4-20mA, 1 = 0-20mA 2120
3.0 ~ 5.2
Integer
2140 Double/Float
10.0 ~ 22.2
–10000 ~ 10000
–10000 ~ 10000
2150 Double/Float
2160 Double/Float
2170 Double/Float
% value of output, 0~100 2180 Double/Float
2200
Reg. address of Meas.
2210
Integer
Integer
0 = 4-20mA, 1 = 0-20mA 2220
3.0 ~ 5.2
Integer
2240 Double/Float
10.0 ~ 22.2
–10000 ~ 10000
2250 Double/Float
2260 Double/Float
–10000 ~ 10000 2270 Double/Float
% value of output, 0~100 2280 Double/Float
2300
Reg. address of Meas.
2310
Integer
Integer
0 = 4-20mA, 1 = 0-20mA 2320
3.0 ~ 5.2
Integer
2340 Double/Float
10.0 ~ 22.2
–10000 ~ 10000
–10000 ~ 10000
2350 Double/Float
2360 Double/Float
2370 Double/Float
% value of output, 0~100 2380 Double/Float
0 ~ 7 (Bitfield) 3000 Integer
0 = Not tripped, 1 = Tripped
0 = OFF, 1 = ON
Reg. address of Meas.
3100
3110
3120
3130
Integer
Integer
Integer
Integer
Set Point = 0, In Band = 1,
Out Band = 2
Depends on unit type
Depends on unit type
3140 Double/Float
3150 Double/Float
•
•
106 Aurora H
2
O User’s Manual
Appendix A. MODBUS RTU / RS485 Communications
Function Parameter
Alarm
(cont.)
Settings
Alarm 2
Alarm 3
Adjust
Clock
External
Pressure
Aurora H
2
O
Serial Number
Laser Serial
Number
------
------
Device ID Calibration
Date
Month
Date
Year
System Up Time MSDate
Status
Switch
Units
Type
Upper
Lower
Status
Switch
Units
Type
Table 4: Modbus Register Map
Upper
Lower
PPM Level offset adjust
Moisture reading average filter size
Hour
Minutes
Month
Date
Year
Constant
Pressure Zero Calibration, mA
Pressure Span Calibration, mA
Pressure Zero Calibration, kPa
Pressure Span Calibration, kPa
Pressure Source
Range/State
0 = Not tripped, 1 = Tripped
0 = OFF, 1 = ON
Reg. address of Meas.
Set Point = 0, In Band = 1,
Out Band = 2
Depends on unit type
Depends on unit type
0 = Not tripped, 1 = Tripped
0 = OFF, 1 = ON
Reg. address of Meas.
Addr Data Type
3200
3210
Integer
Integer
3220
3230
Integer
Integer
3240 Double/Float
3250 Double/Float
3300
3310
Integer
Integer
3320
3330
Integer
Integer
Set Point = 0, In Band = 1,
Out Band = 2
Depends on unit type
Depends on unit type
–25.00 ~ +25.00
10 ~ 200 samples
0~23
0~59
1~12
1~28/29/30/31
2000~2099
0 ~ 3500.00 kPa
0~22 mA
0~22 mA
0~3500 kPa
0~3500 kPa
Constant Value = 0,
Live Sensor = 1
3340 Double/Float
3350 Double/Float
5210 Double/Float
5230 Integer
5410
5420
5430
5440
Integer
Integer
Integer
Integer
5450 Integer
5510 Double/Float
5520 Double/Float
5525 Double/Float
5530 Double/Float
5535 Double/Float
5540 Integer
------
------
1~12
Depends on month
2000~2100
Uptime, in days
Read
Only
•
•
8100 8 Character
Bytes
8200 8 Character
Bytes
•
•
8310
8320
Integer
Integer
8330 Integer •
8400 Double/Float •
•
•
Aurora H
2
O User’s Manual 107
Appendix A. MODBUS RTU / RS485 Communications
Table 4: Modbus Register Map
Function Parameter
Measurements
Dew Point
Temp
Dew Point °C
Dew Point °F
Equivalent Dew Point °C
Equivalent Dew Point °F
Sample Temperature °C
Sample Temperature °F kPa
MPa
PSIa
PSIg
External
Pressure kg/cm 2
Bars mmHg kPa
MPa
PSIa
PSIg
Internal
Pressure kg/cm 2
Bars mmHg
H
2
O
Concentration
PPM
Lbs MMSCF mg/sm 3
Vapor Pressure kPa
------
------
------
------
------
------
------
------
------
------
------
------
------
------
------
------
------
------
------
------
------
------
------
------
Range/State Addr Data Type
Read
Only
9110 Double/Float •
9120 Double/Float •
9130 Double/Float •
9140 Double/Float •
9210 Double/Float •
9220 Double/Float •
9510 Double/Float •
9512 Double/Float •
9520 Double/Float •
9530 Double/Float •
9540 Double/Float •
9550 Double/Float •
9560 Double/Float •
9610 Double/Float •
9612 Double/Float •
9620 Double/Float •
9630 Double/Float •
9640 Double/Float •
9650 Double/Float •
9660 Double/Float •
9710 Double/Float •
9720 Double/Float •
9730 Double/Float •
9800 Double/Float •
1
Address 0 is System Status register, and 1000 is latching version of System Status register. That is, both registers will show the error bit if the error is currently present, but only the latching register will show it if the condition is no longer present. Writing 0 to latching register will clear the error code it contains.
2
The
“
Trim Sequence Start/Resume Live Output
”
registers for the three outputs, (address 2100, 2200, 2300) accept certain values through Write Multiple Register to trim the output current:
1. Write 0 to 2x00 to select the normal mA output (proportional to measurement).
2. Write 1 to 2x00 to reset the mA output trim to factory defaults.
3. Write 2 to 2x00 to output the “zero” current (~4.000 mA) and accept a calibration value written to 2x40.
4. Write 3 to 2x00 to output the “span” current (~20.000 mA) and accept a calibration value written to 2x50.
108 Aurora H
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Appendix A. MODBUS RTU / RS485 Communications
Note: Attempting to write to Trim registers 2x40/2x50 without first writing to Trim State register 2x00 will fail with
Modbus exception 4.
At the end of calibration, write 0 to 2x00 to make
Aurora H
2
O exit trim mode.
present; the hexadecimal values represent the bit set for a given condition.
Status
Table 5: System Status Codes
Description
0x00000000 Aurora H
2
O is operating normally, no faults or other indications.
0x00000008 Aurora H
2
O is reading moisture, but cannot detect the presence of methane.
0x00000010 The moisture level is below the system detection limits.
0x00000020 The temperature inside the electronics module exceeds 85°C. The laser is powered off until the temperature drops below 80°C.
0x00000040 The temperature transducer is operating out of limits, is disconnected, or has failed.
0x00000080 The internal (sample) pressure transducer is operating out of limits, is disconnected, or has failed.
0x00000100 The external (line) pressure transmitter is operating out of limits, is disconnected, or has failed. Occurs if source of the line pressure measurement is set to “Live”, and no pressure transmitter is attached.
0x00000200 Power supply under voltage
0x00000400 System ground fault
0x00000800 The temperature of the laser is not stable. This warning occurs briefly at power on, as the
Aurora H
2
O sets the correct operating temperature. The laser is powered off until the temperature has stabilized.
0x00001000 Aurora H
2 assistance.
O has reached the limit for adjusting the signal gain. Contact the factory for
0x00002000 Aurora H
2
O has reached the limit for adjusting the laser power. Contact the factory for assistance.
0x00004000 Aurora H
2
O could not detect any signal from the laser. Contact the factory for assistance.
0x00010000 Aurora H
2
O could not detect a signal returned from the sample cell, or the signal is below allowed limits. Check the mirror for contamination.
0x00020000 Aurora H
2
O has detected a failure in the laser temperature control. Contact the factory for assistance.
0x00040000 The pressure in the Aurora H
2
O sample cell is greater than 212 kPa (30.75 psia). Verify regulator and flow settings; check for blocked vent line or excessive back pressure.
0x00000000 The Aurora H
2
O temperature controller is was set beyond its operating limits. Contact the factory for assistance.
0x1yyyzzzz Extended Error Code
Aurora H
2
O User’s Manual 109
Appendix A. MODBUS RTU / RS485 Communications
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110 Aurora H
2
O User’s Manual
Index
A
AuroraView
Capabilities
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Datalogging with
. . . . . . . . . . . . . . . . . . . . . . . . . 79
Installing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Requirements
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Scan Plots
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Starting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Trend Plots
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Trend Tabular Data
. . . . . . . . . . . . . . . . . . . . . . . 80
Using Main Menus
. . . . . . . . . . . . . . . . . . . . . . . . 73
B
Bill of Materials
. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
C
Clock, Resetting
. . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Comm Port Settings
. . . . . . . . . . . . . . . . . . . . . . . . . 47
Components
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 ,
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
D
Default Display
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Display
Blank
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Dim or Hard to Read
. . . . . . . . . . . . . . . . . . . . . . 99
Locking/Unlocking
. . . . . . . . . . . . . . . . . . . . . . . 62
Setting Up
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Display, Default
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
E
Electrical Connections
. . . . . . . . . . . . . . . . . . . . . . . 24
F
Features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Filter Element, Replacing
. . . . . . . . . . . . . . . . . . . 7 ,
G
Gas Molecular Weight, Adjusting
. . . . . . . . . . . . . . . 51
H
Heater
EU/ATEX
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ,
USA/CAN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 ,
I
Indicator Lights
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Insertion Probe/Regulator
Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Setting the Pressure
. . . . . . . . . . . . . . . . . . . . . . . 23
Installation
Choosing a Site
. . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mounting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Installation, System
. . . . . . . . . . . . . . . . . . . . . . . . . 11
K
Keypad
Features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Lock-Out Switch
. . . . . . . . . . . . . . . . . . . . . . . . . 35
Unlocking
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
L
Lights, Indicator
. . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Low Voltage Directive
. . . . . . . . . . . . . . . . . . . . . . . 14
M
Magnetic Stylus
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Menu Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Menus, Accessing
. . . . . . . . . . . . . . . . . . . . . . . . . . 36
Mirror, Cleaning
. . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Modbus
Register Map
. . . . . . . . . . . . . . . . . . . . . . . . . . . 106
RTU/RS485 Communications
. . . . . . . . . . . . . . . 105
Mounting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 ,
29
N
Numeric Values, Entering
. . . . . . . . . . . . . . . . . . . . 36
O
Offset Values, Adjusting
. . . . . . . . . . . . . . . . . . . . . 49
Operation
Sample System
. . . . . . . . . . . . . . . . . . . . . . . . . . 31
Theory of
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Aurora H
2
O User’s Manual 111
Index
P
Parts
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Parts List
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pressure Settings, Resetting
. . . . . . . . . . . . . . . . . . . 55
Programming
Advanced Features
. . . . . . . . . . . . . . . . . . . . . . . . 47
General
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Menu Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Q
Quick Startup Guide
. . . . . . . . . . . . . . . . . . . . . . . . 32
R
Regional Settings
. . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Replacing the Filter Element
. . . . . . . . . . . . . . . . 7 ,
S
Sample System
Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Quick Startup Guide
. . . . . . . . . . . . . . . . . . . . . . . 32
Settings, Regional
. . . . . . . . . . . . . . . . . . . . . . . . . . 57
Site Location
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Spare Parts
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Starting Up
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Stylus, Magnetic
. . . . . . . . . . . . . . . . . . . . . . . . . . . 34
System
Components
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
T
Troubleshooting
. . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Blank Display
. . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Display Dim or Hard to Read
. . . . . . . . . . . . . . . . 99
No Flow Measurement
. . . . . . . . . . . . . . . . . . . . 101
Status Messages and Indicators
. . . . . . . . . . . . . . . 99
Using a Moisture Standard
. . . . . . . . . . . . . . . . . 102
Using a Portable Hygrometer
. . . . . . . . . . . . . . . 101
Verifying Performance
. . . . . . . . . . . . . . . . . . . . 101
U
Unpacking
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
V
Verification Period
. . . . . . . . . . . . . . . . . . . . . . . . . . 89
W
Wiring
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 ,
30
Wiring Diagram
EU/ATEX Heater
. . . . . . . . . . . . . . . . . . . . . . . . . . 8
USA/CAN Heater
. . . . . . . . . . . . . . . . . . . . . . . . . 8
112 Aurora H
2
O User’s Manual
Warranty
Warranty
Each instrument manufactured by GE Sensing is warranted to be free from defects in material and workmanship.
Liability under this warranty is limited to restoring the instrument to normal operation or replacing the instrument, at the sole discretion of GE Sensing. Fuses and batteries are specifically excluded from any liability. This warranty is effective from the date of delivery to the original purchaser. If GE Sensing determines that the equipment was defective, the warranty period is:
• one year from delivery for electronic or mechanical failures
• one year from delivery for sensor shelf life
If GE Sensing determines that the equipment was damaged by misuse, improper installation, the use of unauthorized replacement parts, or operating conditions outside the guidelines specified by GE Sensing, the repairs are not covered under this warranty.
The warranties set forth herein are exclusive and are in lieu of all other warranties whether statutory, express or implied (including warranties or merchantability and fitness for a particular purpose, and warranties arising from course of dealing or usage or trade).
Return Policy
If a GE Sensing instrument malfunctions within the warranty period, the following procedure must be completed:
1. Notify GE Sensing, giving full details of the problem, and provide the model number and serial number of the instrument. If the nature of the problem indicates the need for factory service, GE Sensing will issue a RETURN
AUTHORIZATION NUMBER (RAN), and shipping instructions for the return of the instrument to a service center will be provided.
2. If GE Sensing instructs you to send your instrument to a service center, it must be shipped prepaid to the authorized repair station indicated in the shipping instructions.
3. Upon receipt, GE Sensing will evaluate the instrument to determine the cause of the malfunction.
Then, one of the following courses of action will then be taken:
• If the damage is covered under the terms of the warranty, the instrument will be repaired at no cost to the owner and returned.
• If GE Sensing determines that the damage is not covered under the terms of the warranty, or if the warranty has expired, an estimate for the cost of the repairs at standard rates will be provided. Upon receipt of the owner’s approval to proceed, the instrument will be repaired and returned.
Aurora H
2
O User’s Manual 113
Warranty
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114 Aurora H
2
O User’s Manual
GE
Sensing
DECLARATION
OF
CONFORMITY
DOC-0007, Rev. A
We, GE Sensing
1100 Technology Park Drive
Billerica, MA 01821
USA declare under our sole responsibility that the
Aurora H
2
O Moisture Analyzer to which this declaration relates, is in conformity with the following standards:
• EN 60079-0: 2006
• EN 60079-1: 2007
• EN 60079-7: 2007
• EN 60529: 1991 +A1: 2000
• II 2 G Ex de IIB T6, T a
= -20°C to +65°C, IP66; FM09ATEX0065X (FM Global, UK)
• EN 61326-1: 2006, Class A, Table 2, Industrial Locations
• EN 61326-2-3: 2006
• EN 61010-1: 2001, Overvoltage Category II, Pollution Degree 2
• IEC 60825-1 following the provisions of the 2004/108/EC EMC, 2006/95/EC Low Voltage and 94/9/EC ATEX Directives.
The unit listed above and any ancillary equipment supplied with it do not bear CE marking for the Pressure
Equipment Directive, as they are supplied in accordance with Article 3, Section 3 (sound engineering practices and codes of good workmanship) of the Pressure Equipment Directive 97/23/EC for DN<25.
Billerica - August 2010
Issued Mr. Gary Kozinski
Certification & Standards, Lead Engineer
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Customer Support Centers
U.S.A.
The Boston Center
1100 Technology Park Drive
Billerica, MA 01821
U.S.A.
Tel: 800 833 9438 (toll-free)
978 437 1000
E-mail: [email protected]
Ireland
Sensing House
Shannon Free Zone East
Shannon, County Clare
Ireland
Tel: +353 (0)61 470291
E-mail: [email protected]
910-284 Rev. D
An ISO 9001:2008 Certified Company www.ge-mcs.com/en/about_us/quality.html
www.ge-mcs.com
©2011 General Electric Company. All rights reserved.
Technical content subject to change without notice.

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Key features
- Optical response: <2 seconds
- No cross sensitivity to glycols or amines
- Direct readout in lbs/mmscf, mg/m3 or ppm
- Reads process pressure dew point
- Turnkey sampling system
- Magnetic Stylus enables through-glass programming – hot permit not required to field program
- Explosionproof/Flameproof design
- 4-20 mA signals and RS-232/485 MODBUS RTU for connection to SCADA or plant monitoring system
- Supplied with AuroraView software for remote configuration, data logging and data retrieval capacity
- NIST traceable calibration