DigiTrace C910 Series Heat Trace Controller

DigiTrace® C910 Series
Heat Trace Controller
Installation, Operation, and Maintenance
Manual
Firmware versions up to V3.2X
Contents
Section 1 Overview ...................................................................... 1
1.1 Introduction .............................................................................................. 1
1.2 Product Overview ...................................................................................... 1
1.2.1 Description .................................................................................... 1
1.2.2 Features ......................................................................................... 1
1.3 Product Specification ................................................................................ 3
Section 2 Installation and Wiring ..................................................... 5
2.1 Introduction .............................................................................................. 5
2.2 Initial Inspection ....................................................................................... 5
2.3 Installation Location .................................................................................. 5
2.4 Mounting Procedures ............................................................................... 5
2.5 Wiring ....................................................................................................... 6
2.5.1 Power Connections ........................................................................ 6
2.5.2 Temperature Sensor and Extension Cables ................................... 6
2.6 Alarm Relay Connections .......................................................................... 7
2.6.1 Communication Signal Connections .............................................. 8
2.7 Initializing the Controller ........................................................................... 9
2.7.1 Initial Cable Test ............................................................................ 9
Section 3 Operator Console .......................................................... 10
3.1 Alphanumeric Display ............................................................................. 10
3.2 Keypad .................................................................................................... 10
3.3 LED Indicators ........................................................................................ 11
Section 4 DigiTrace C910 Operation ................................................ 12
4.1 Operating Modes..................................................................................... 12
4.1.1 Four Modes of Console ................................................................ 12
4.2 Console Mode Menus ............................................................................. 13
4.2.1 Alphanumeric Tag Assignment .................................................... 15
4.2.2 Setting Units ................................................................................ 16
4.2.3 Switch Control Mode ................................................................... 17
4.2.4 Proportional Ambient Sensing Control (PASC) ........................... 18
4.2.5 Control Setpoint ........................................................................... 19
4.2.6 Deadband ..................................................................................... 20
4.2.7 Temperature Sensor Failure Alarm .............................................. 21
4.2.8 Low Temperature Alarm: Enable (Lo TS 1 and Lo TS 2) ............. 22
4.2.9 Low Temperature Alarm: Setting (Lo TS 1 and Lo TS 2)............. 23
4.2.10 High Temperature Alarm: Enable (Hi TS 1 and Hi TS 2) ............ 24
4.2.11 High Temperature Alarm: Setting (Hi TS 1 and Hi TS 2) ........... 25
4.2.12 Low Load Current Alarm: Enable (Lo Load) .............................. 26
4.2.13 Low Load Current Alarm: Setting (Lo Load) .............................. 27
4.2.14 Factory Default Settings (Load Defaults) ................................... 28
4.2.15 Ground-fault Current Alarm level (Hi GF Alarm) ........................ 29
4.2.16 Ground-fault Current Trip Level (Hi GF Trip) ............................. 30
4.2.17 Temperature Sensor Failure Mode............................................. 31
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4.2.18 Temperature sensor Control Mode (TS CLT Mode)................... 32
4.2.19 Firmware Version ....................................................................... 33
4.2.20 Passcode ................................................................................... 34
4.2.21 Alarm Output Normal State........................................................ 35
4.2.22 Communications Setup ............................................................. 36
4.2.23 Auto-Cycle: Enabling.................................................................. 38
4.2.24 Auto-Cycle: Interval ................................................................... 39
4.2.25 Auto-Cycle: Units ....................................................................... 40
4.2.26 Contactor Count ......................................................................... 41
4.2.27 Monitor and Maintenance Menus .............................................. 42
4.2.28 Acknowledging and Resetting Alarms ....................................... 44
Section 5 Troubleshooting............................................................ 46
Appendix A: Proportional Ambient Sensing Control (PASC)..................... 48
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Section 1 Overview
1.1 Introduction
This manual provides information pertaining to the installation, operation, testing and
maintenance of the Tyco Thermal Controls DigiTrace® C910 Series Heat Trace
Controller.
Additional copies of this user manual may be ordered separately through your Tyco
Thermal Controls representative or online at www.tycothermal.com.
This document covers the DigiTrace C910 Series Heat Trace Controllers and its
available options. To ensure that you are using the correct documentation for your
particular version of controller, please check the firmware version number of your
DigiTrace C910 against the version number listed on the front of this manual. This may
be displayed using the operator console or a communicating device.
1.2 Product Overview
1.2.1 Description
The DigiTrace C910 Series Electronic Heat Trace Controller controls, monitors, and
communicates alarms and data for one heating cable circuit. It is available with a RS485 communication module in the C910-485 for remote operation over Modbus®
protocol if desired.
1.2.2 Features
A detailed description of available features may be found in Section 4 of this manual.
Highlights of specific features follow:
Keypad and Alphanumeric Display
A six character alphanumeric LED display provides the operator with large easy to read
messages and prompts, eliminating complex and cryptic programming. Six individual
keys are provided to quickly access alarming and operational information.
–40°F to 140°F (–40°C to 60°C) Operation
Extended temperature operation permits installation in all but the harshest
environments.
Single or Dual Temperature Sensor Inputs
The ability to utilize one or two temperature sensor (TS) inputs allows the selection of
one of eight control modes and programming of all temperature parameters.
High and Low Temperature Alarms
High and low temperature alarms are offered for both temperature sensor inputs of each
control point.
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Low Current Alarms
The DigiTrace C910 offers adjustment of the low alarm points over the entire current
measurement range.
Electromechanical Relay (EMR) Output
The DigiTrace C910 is equipped with a 30 A rated electromechanical relay (EMR)
output switch with device failure alarm.
Ground-fault Alarm and Trip
Ground-fault (GF) current levels are monitored and may be displayed in milliamperes.
The adjustable ground-fault level gives the user the choice of both alarm and trip levels
suitable for the particular installation.
Proportional Ambient Sensing Control (PASC)
The DigiTrace C910 includes the Proportional Ambient Sensing Control (PASC) mode
to maximize the energy efficiency of the heat tracing system.
Minimum/Maximum Temperature Tracking
The controller maintains the minimum and maximum temperature values it has
measured since the last reset of these values.
Temperature Alarms
The controller alarms on user selectable low and high temperature limits.
Auto-cycling
The controller will momentarily energize the circuit (for 10 seconds) at a programmable
interval in order to test the heat tracing circuit during periods of non-use. This feature
will detect issues with the heat-tracing circuit before it can lead to system damage.
Temperature Sensor Failure Alarm
Both open and shorted sensors are detected and alarmed by the controller.
Full Digital Communications
The DigiTrace C910-485 incorporates RS-485 serial communication for applications
requiring direct interfacing to BMS systems using Modbus protocol.
Certification
Tyco Thermal Controls certifies that this product met its published specifications at the
time of shipment from the factory.
Limited Warranty
This Tyco Thermal Controls product is warranted against defects in material and
workmanship for a period of 18 months from the date of installation or 24 months from
the date of purchase, whichever occurs first. During the warranty period, Tyco Thermal
Controls will, at its option, either repair or replace products that prove to be defective.
For warranty service or repair, this product must be returned to a service facility
designated by Tyco Thermal Controls. The Buyer shall prepay shipping charges to Tyco
Thermal Controls and Tyco Thermal Controls shall pay shipping charges to return the
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product to the Buyer. However, the Buyer shall pay all shipping charges, duties, and
taxes for products returned to Tyco Thermal Controls from another country. Tyco
Thermal Controls warrants that the software and firmware designated by Tyco Thermal
Controls for use with the DigiTrace C910 Controller will execute its programming
instructions properly. Tyco Thermal Controls does not warrant that the operation of the
hardware, or software, or firmware will be uninterrupted or error-free.
Warranty Exclusion/Disclaimer
The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by the Buyer, Buyer-supplied software or interfacing, unauthorized
modification or misuse, operation outside of the specifications for the product, or
improper installation. No other warranty is expressed or implied. Tyco
Thermal Controls disclaims the implied warranties of merchantability
and fitness for a particular purpose.
Exclusive Remedies
The remedies provided herein are the buyer’s sole and exclusive remedies. Tyco
Thermal Controls shall not be liable for any direct, indirect, special, incidental, or
consequential damages, whether based on contract, tort, or any other legal theory.
Conducted and Radiated Emissions—FCC/DOC Statement of Compliance
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference, in which case the
user will be required to correct the interference at their expense. This equipment does
not exceed Class A limits for radio emissions as set out in Schedule V to VIII of the
Radio Interference Regulations of Communication Canada.
1.3 Product Specification
General
Area of use
Approvals
Supply voltage
Enclosure
Protection
Materials
Ambient operating temperature range
Ambient storage temperature range
Relative humidity
DigiTrace C910 Series Heat Trace Controller IOM
Nonhazardous locations
100 V to 277 V, +5/–10%, 50/60 Hz
Common supply for controller and heat-tracing circuit
NEMA 4X
FRP
–40°F to 140°F (–40°C to 60°C)
–40°F to 185°F (–40°C to 85°C)
0% to 90%, noncondensing
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Control
Relay type
Voltage, maximum
Current, maximum
Control algorithms
Control range
Monitoring
Temperature
Ground fault
Current
Autocycle
Temperature Sensor Inputs
Quantity
Types
Double-pole, mechanical
277 V nominal, 50/60 Hz
30 A @ 104°F (40°C) derated to 20 A @ 140°F (60°C)
EMR: On/off, proportional ambient sensing control (PASC)
0°F to 200°F (–18°C to 93°C)
Low alarm range
0°F to 180°F (–18°C to 82°C) or OFF
High alarm range
0°F to 200°F (–18°C to 93°C) or OFF
Alarm range
20 mA to 100 mA
Trip range 20 mA to 100 mA
Low alarm range
0.3 A to 30 A or OFF
Diagnostic test interval adjustable from 1 to 240 minutes or 1 to 240 hours
Two inputs standard
100 Ω platinum RTD, 3-wire, α= 0.00385 ohms/ohm/°C
Can be extended with a 3-conductor shielded cable of 20 Ω maximum per
conductor
Alarm Outputs
AC relay
Isolated solid-state triac, SPST, 0.75 A maximum, 100 V to 277 V nominal
Dry contact relay
Pilot duty only, 48 V/dc, 500 mA maximum, 10 VA maximum resistive switching
Note: Outputs are configurable as “open on alarm” or “close on alarm”
Programming and Setting
Method
Programmable keypad
Units
Imperial (°F, in.) or Metric (°C, mm)
Digital display
Actual temperature, control temperature, heating cable current, ground fault,
programming parameter values, alarm values
LEDs
Current mode, heating cable on, alarm condition, receive/transmit data
Memory
Nonvolatile, restored after power loss, checksum data checking
Stored parameters (measured)
Minimum and maximum temperature, maximum ground-fault current, maximum
heating cable current, contactor cycle count, time in use
Alarm conditions
Low/high temperature, low current
Ground-fault alarm, trip
RTD failure, loss of programmed values, or EMR failure
Other
Password protection
Connection Terminals
Power supply input
Screw terminals, 22–8 AWG
Heating cable output
Screw terminals, 22–8 AWG
Ground
Two box lugs, 14–6 AWG
RTD/alarm/communications
28–12 AWG spring clamp terminals
Mounting
FRP enclosure
Surface mounting with four fixing holes on 6.0 in x 11.0 in (152 mm x 279 mm)
centers
Hole diameter: 0.31 in (8 mm)
Communications with C910-485
Protocol
Topology
Cable
Length
Quantity
Address
4
Modbus RTU / ASCII
Multidrop, daisy chain
Single shielded twisted pair, 26 AWG or larger
1.7 miles (2.7 km) maximum @ 9600 baud
Up to 32 devices without repeater
Programmable
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Section 2 Installation and Wiring
2.1 Introduction
This section includes information regarding the initial inspection, preparation for use,
and storage instructions for the DigiTrace C910 and DigiTrace C910-485 Heat Trace
controllers.
2.2 Initial Inspection
Inspect the shipping container for damage. If the shipping container or cushioning
material is damaged, it should be kept until the contents of the shipment have been
verified and the equipment has been checked mechanically and electrically. If the
shipment is incomplete, there is mechanical damage, a defect, or the controller does not
pass the electrical performance tests, notify the nearest Tyco Thermal Controls
representative. If the shipping container is damaged, or the cushioning material shows
signs of stress, notify the carrier as well as your Tyco Thermal Controls representative.
Keep the shipping materials for the carrier’s inspection.
2.3 Installation Location
The wide ambient operating temperature range of the controller permits installation in
most locations. Considerations should include accessibility for maintenance and testing
and the location of existing conduits.
2.4 Mounting Procedures
The mounting template is shown in Figure 1.
Drill conduit entry holes prior to mounting. Conduit entries should be made in the bottom
of the enclosure if possible to reduce the possibility of water entry from condensation or
leakage. Conduit entries must be drilled or punched using standard industry practices.
Use bushings suitable for the environment and install such that the completed
installation remains waterproof. Grounding hubs and conductors must be installed in
accordance with Article 501-4(b) of the National Electrical Code and Part I of the
Canadian Electrical Code.
Figure 1 – Mounting Hole Template
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2.5 Wiring
The following drawings provide sample wiring diagrams for the DigiTrace C910 Series
control products and optional accessories. Please contact your local Tyco Thermal
Controls representative for information regarding other available options.
2.5.1 Power Connections
The DigiTrace C910 controller may be powered directly from a 100 V to 277 V supply.
All of the power terminals are labeled for easy identification. Do not attempt to use wire
sizes that exceed the marked terminal ratings and avoid terminating two wires on the
same terminal whenever possible.
Note: Make sure that power terminals are retightened several days after installation.
Stranded wire will tend to compress when initially installed; therefore, these terminals
should be checked for tightness several times after the system is installed to ensure that
a good connection is maintained.
Note: Follow the industry standard grounding practices do not rely on conduit
connections to provide a suitable ground. Grounding terminals/screws are provided for
connection of system ground leads.
Figure 2 – Power Connection
2.5.2 Temperature Sensor and Extension Cables
The C910 has two (2) RTD inputs, use only 3-wire 100 Ω Platinum RTDs (DIN 43760,
α=0.00385 Ω / Ω /°C)
Note: The DigiTrace C 910 default is set for one RTD in position one. If a second RTD
is installed in position two, the controller must be power cycled to recognize the RTD.
Figure 3 – Temperature Sensor Wiring
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Use shielded, twisted, three-conductor wire for the extension of RTD leads. The wire
size should ensure that the maximum allowable lead resistance is not exceeded (20
Ω/lead). RTD wiring should be grounded at the controller end only, using the terminals
provided.
2.6 Alarm Relay Connections
Two types of alarm relays are provided: One is a DC contact and can be connected as
dry contact (Fig. 4) or as a 12 Vdc contact (Figure 5). The second is an AC relay (triac)
and can be connected as an alarm relay (Figure 6) or a powered alarm relay (Figure 7).
Both may be programmed for normally open (N.O.) or normally closed (N.C.) operation.
Note: Both alarm relays are controlled by the DigiTrace C910 using the same signal.
Note: The dry contact alarm relay is intended to be used for switching low-voltage, lowcurrent signals. Do not use this relay to directly switch line voltages.
Alarm Output Wiring
Figure 4 – Used As a Dry Contact
Figure 5 – Used As a Switched DC Contact
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Figure 6 – Used As an AC Alarm Relay
Figure 7 – Used as a Powered AC Alarm Relay
2.6.1 Communication Signal Connections
The DigiTrace C910-485 controller includes a RS-485 communications interface. Use
twisted pair, shielded cable communication wiring. Ground the shield on
communications wiring at one end only, using the terminals provided.
Figure 8 – Communication Wiring (C910-485 only) RS-485 (2-Wire) Connections
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2.7 Initializing the Controller
2.7.1 Initial Cable Test
To minimize the risk of damage to the controller due to a cable fault, the integrity of the
heating cable should be verified by performing the commissioning tests detailed in the
appropriate product installation and operating manual. These manual can be found on
www.tycothermal.com
These tests must be performed with the controller output disconnected. Once the cable
has been checked, it may be reconnected to the controller and power applied.
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Section 3 Operator Console
3.1 Alphanumeric Display
The console incorporates a six characters, fourteen segment, plus decimal LED display.
Messages and prompts that are greater than six characters long are scrolled, allowing
more meaningful, non-cryptic messages to be used.
3.2 Keypad
The local keypad consists of six keys that allow you to select the console mode function
that you are interested in. For certain keys, the SHIFT key selects an alternate function,
as shown by the text above that key.
Refer to Figure 9
Key
10
Function
SHIFT
Press to activate a shifed function; the
next key pressed uses the alternate
(shifted) function (ALARM, MONITOR
and CONFIG).
The SHIFT LED illuminates, indicating the
next key uses the alternate (shifted)
function.
Pressing SHIFT again cancels the
alternate (shifted) function.
TEST
Turns on heating cable circuit for 30
seconds.
SHIFT + TEST Switches the console to the
Alarm/reset mode.
BACK
Exits the current menu (or cancels the new
setting when editing a parameter)
Moves the cursor to the left when editing
an alphanumeric parameter.
[SHIFT + MONITOR] Switches the console
to the Monitor mode.
ENTER
Selects the item in the display (or accepts
the setting when editing a parameter).
Moves the cursor to the right when editing
an alphanumeric parameter.
[shift + CONFIG] Switches the console to
the CONFIG mode.
Moves to the previous item in a menu.
Increments the value when editing.
Moves to the next item in a menu.
Decrements the value when editing.
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3.3 LED Indicators
The console includes eight LED indicators:
Four LEDs indicate the console operating mode (SHIFTed function, ALARM,
MONITOR, or CONFIGure modes).
Two status LEDs indicate the alarm and control output status of the controller:
The output LED, when illuminated steadily, indicates that the output of the controller is
turned on and is allowing current to flow into the heating cable circuit.
The alarm LED will flash (approximately once per second) when the controller has
detected an alarm condition.
Two additional LEDs are used to indicate external communications activity and are only
used with the DigiTrace C910-485 with the optional RS-485 communications interface.
The “Rx” LED flashes to show that the Controller is receiving information via its
communications port.
The “Tx” LED flashes when the Controller is transmitting information via its
communications port.
Figure 9 – Operator Console
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Section 4 DigiTrace C910 Operation
4.1 Operating Modes
4.1.1 Four Modes of Console
Scan
This is the default mode displayed during normal operation. In this mode, the console
sequentially displays load current, temperature, and setpoint readings.
Alarm
This mode allows you to examine or reset any alarms that may exist. The LED above
the ALARM key is illuminated while in this mode. To enter this mode:
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Press [TEST]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the
ALARM screen.
Monitor
This mode allows you to examine any of the controller readings such as temperature,
load current, etc. The LED above the MONITOR key is illuminated while in this mode.
To active this mode:
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Press [BACK]
ALARM
SHIFT
12
MONITOR
CONFIG
BACK
ENTER
TEST
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You are now in the
Monitor/Maintenance
menus.
DigiTrace C910 Series Heat Trace Controller IOM
Configure
This mode allows you to access the console menus to examine or alter the settings.
The LED above the CONFIG key is illuminated while in this mode. To access the
operational menus:
4.2 Console Mode Menus
The Console Mode Menu Index below shows all user interface parameters. This menu
shows the factory default along with the associated range. The section column refers to
the section in this manual that illustrates the actual keystrokes required to input the
parameters.
Console Mode Menu Index
Section
4.2.1
Parameter
Tag
Factory Default
Factory ID
4.2.2
4.2.3
Units
Switch Control Mode
Imperial
ON/OFF
4.2.4
Proportional Ambient Sensing
Control (PASC) Setup
Control Setpoint
Deadband
See details
Temp Sensor Failure Alarm
(TS2 Fail)
Low Temp Alarm Enable
(Lo TS 1 / Lo TS 2)
Low Temp Alarm Setting
(Lo TS 1 / Lo TS 2)
High Temp Alarm Enable
(Hi TS 1 / Hi TS 2)
High Temp Alarm Setting
(Hi TS 1 / Hi TS 2)
Low Load Alarm Enable
(Lo Load)
Low Load Alarm Set Point
(Lo Load)
Disable
Range
See details in
section
Imperial / Metric
PASC or on/off
Control
See details in
section
0°F to 200°F
1°F to 10°F (1°C
to 6°C)
Enable / Disable
Enable
Enable / Disable
35°F (2°C)
0°F to 180°F (-18°
to 82°C)
Disable
Enable / Disable
180°F
0°F to 200°F (-18°
to 93°C)
Enable
Enable/ Disable
1A
0.3 A to 30 A or
OFF
4.2.5
4.2.6
4.2.7
4.2.8
4.2.9
4.2.10
4.2.11
4.2.12
4.2.13
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40°F (4°C)
5°F (3°C)
13
4.2.14
Factory Default Settings
NA
4.2.15
20 mA
30 mA
20 mA to 100 mA
On
On/Off
TS1-Fail On
4.2.19
4.2.20
Ground-fault Current Alarm
level (Hi GF Alarm)
Ground-fault Current Trip level
(GFI Trip)
Temperature Sensor Failure
(TS Fail Mode)
Temperature sensor control
mode (TS CTL)
Firmware Version
Password
See details in
section
20 mA to 100 mA
0000
4.2.21
Alarm Output Normal State
N.C.
4.2.22
Communications Setup
HTCBus
See details in
section
N/A
4 digit numerical
entry
Normally open
(NO) / Normally
closed (NC)
See details in
section
4.2.23
4.2.24
4.2.25
4.2.26
4.2.27
Auto-Cycle: Enabling
Auto-Cycle: Interval
Auto-Cycle: Units
Contactor Count
Monitor and Maintenance
Enable
8
Hours
200,000
N/A
4.2.28
Alarm: Acknowledge and reset
mode.
N/A
4.2.16
4.2.17
4.2.18
14
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Enable / Disable
1 to 240
Minutes / Hours
0 to 999,999
See details in
section
See details in
section
DigiTrace C910 Series Heat Trace Controller IOM
4.2.1 Alphanumeric Tag Assignment
Purpose
A 19 character alphanumeric TAG may be assigned to a control
point to allow it to be easily associated with a pipe, vessel, process,
circuit, drawing name, or number.
Any combination of 19 characters from A–Z, 0–9, /, -, ., (, ), or #.
Setting
Keystrokes for changing TAG
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Press [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
You are now in the Console
menus.
TEST
Press the [ENTER]
again to edit the TAG name
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Tag=Tag-000074465
TEST
Default Tag Name
Use the [UP/[DOWN] arrow keys to change the the digit that is blinking
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [RIGHT/LEFT] arrow keys to move to the next digit
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new TAG name scrolls across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
New Tag name
Press the [BACK] key to escape to the main screen
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
TEST
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4.2.2 Setting Units
Purpose
This allows selection of the type units (temperature or size) to display on
the operator.
Metric or Imperial
Factory default
Imperial
Setting
Keystrokes for Changing Units
Start
Press [SHIFT]
ALARM
SHIFT
Press the [DOWN] arrow
key until you see
Press [ENTER]
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
SHIFT
TEST
You are now in the console menus
Display
Units = Imperial
Default Units
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [UP/[DOWN] arrow keys to select between imperial and metric
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key , the new UNITS will be scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Units = Metric
TEST
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
16
MONITOR
CONFIG
BACK
ENTER
TEST
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4.2.3 Switch Control Mode
Purpose
This allows selection of the type of algorithm to be used to maintain the
control setpoint temperature.
On/Off or Proportional Ambient
Factory
On/off
Sensing Control (PASC)
default
Setting
Keystrokes for changing Switch Control Mode
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press the [DOWN] arrow
key until you see
Press [ENTER]
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Switch Control Mode =
ON/OFF
TEST
Use the [UP/[DOWN] arrow key to select between ON/OFF and PASC
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key, the new control mode will be scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Switch Control Mode = nn
TEST
Where nn is either ON/OFF or PASC
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
17
4.2.4 Proportional Ambient Sensing Control (PASC)
Purpose
This control mode sets Proportional Ambient Sensing Control (PASC).
See Appendix A for more details.
Settings
Range
½, 1 or, ≥ 2
0 to 200°F
(–18 to 92°C)
–99 to 125°F
(–73 to 52°C)
10 – 200%
Pipe Size (inch):
Control Setpoint:
Min. Design Ambient:
Power Adjust Factor:
Factory Default
½40°F (4°C)
–40°F (–40°C)
100%
Keystrokes for Entering PASC Setup Parameters
Start
Press the [DOWN] arrow
Press [SHIFT]
ALARM
SHIFT
key until you see
Press [ENTER]
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
PASC SETUP....
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Display
Pipe Size = 2.0 INCH
Use the [UP]/[DOWN] arrow key to change one of three PASC parameters
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
POWER ADJUST = 100%
TEST
Display
Minimum Ambient Temperature = -40’F
Press the [ENTER] key to select one of the three parameters
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Note:
Units shown are Imperial.
If Metric is selected then
parameters are shown in metric
TEST
Use the [UP]/[DOWN] arrow key to change the digit that is blinking
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [RIGHT]/LEFT] arrow to to move to the next digit
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new PASC parameter is scrolling across the screen
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
If you need to change another PASC Setup parameter then use the [UP/DOWN]
arrow keys followed by the [ENTER] key.
or
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
18
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
4.2.5 Control Setpoint
Purpose
This is the temperature that the controller uses to determine whether
its output switch should be on or off.
0°F to 200°F (–18°C to 93°C)
Factory default
40°F (4°C)
Setting/Range
Keystrokes for Changing the Control Setpoint
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press the [DOWN] arrow
key until you see
Press [ENTER]
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Control Setpoint = 40’F
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Default = 40 ‘F
TEST
Use the [UP]/[DOWN] arrow key to change the digit that is blinking
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [RIGHT]/LEFT] arrow to to move to the next digit
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new control setpoint scrolls across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Control Setpoint = xx’F
Where xx is the new setpoint
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
19
4.2.6 Deadband
Purpose
The deadband is a window of difference between the measured
control temperature and the desired control setpoint temperature
and provides the decision to turn the output off or on
1°F to 10°F (1°C to 6°C)
Factory default
5°F (3°C)
Setting/Range
Keystrokes for Changing Deadband
Start
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press the [DOWN] arrow
key until you see
Press [ENTER]
Press [SHIFT]
ALARM
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
DEADBAND = 5’F
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [UP]/[DOWN] arrow key to change the digit that is blinking
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [RIGHT]/LEFT] arrow to to move to the next digit
ALARM
SHIFT
MONITOR
ALARM
CONFIG
SHIFT
TEST
BACK
ENTER
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new deadband scrolls across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
DEADBAND = xx’F
Where xx is the new deadband
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
20
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
4.2.7 Temperature Sensor Failure Alarm
Purpose
This allows the user to enable or disable the temperature sensor failure
alarm.
Alarm time delay filter is factory set < 2 minutes.
Enable or disable
Factory default
Enable
Setting/Range
Keystrokes for Enabling and Disabling TS 2
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press the [DOWN] arrow
key until you see
Press [ENTER]
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
TS 2 Fail = DIS
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Default = Disable
TEST
Use the [UP/[DOWN] arrow keys to select Enable
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the TS 2 = Enable scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
TS 2 Fail = ENA
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
21
4.2.8 Low Temperature Alarm: Enable (Lo TS 1 and Lo TS 2)
Purpose
This allows the user to enable or disable the low temperature alarm for
temperature sensor number 1 and 2.
Alarm time delay filter is factory set at 15 minutes.
Enable or disable
Factory default
Enable
Setting/Range
Keystrokes for Enabling and Disabling
Lo TS ( Temperature Sensor Alarm) 1 and 2
Low Temperature Sensor Alarm
Start
ALARM
SHIFT
Press the [DOWN] arrow
key until you see
Press [ENTER]
Press [SHIFT]
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Lo TS 1 = ENA
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
or
Lo TS 2 = DIS
TEST
Use the [UP/[DOWN] arrow keys to select Disable or Enable
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new Lo TS Enable and/or Disable scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Lo TS 1 = nn
TEST
or
Lo TS 2 = nn
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
22
MONITOR
CONFIG
BACK
ENTER
Where nn is either Enable or Disable
TEST
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
4.2.9 Low Temperature Alarm: Setting (Lo TS 1 and Lo TS 2)
Purpose
This allows the user to set the low temperature alarm setting for
temperature sensor number 1 and 2.
Alarm time delay filter is factory set at 15 minutes.
0°F to 180°F (–18 to 82°C)
Factory default
35°F (2°C)
Setting/Range
Keystrokes for Entering the Setpoint for
Lo TS (Temperature Sensor) 1 and 2
Low Temperature Sensor Setpoint
Start
Press [SHIFT]
ALARM
SHIFT
Press the [DOWN] arrow
key until you see
Press [ENTER]
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Lo TS 1 = 35’F
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
or
Lo TS 2 = 35’F
TEST
Default = 35’F
Use the [UP]/[DOWN] arrow key to change the digit that is blinking
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [RIGHT]/LEFT] arrow to to move to the next digit
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new Lo Ts Setpoint is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Lo TS 1 = xx’F
TEST
or
Lo TS 2 = xx’F
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
Where xx is the new set point
TEST
H58415 11/10
23
4.2.10 High Temperature Alarm: Enable (Hi TS 1 and Hi TS 2)
Purpose
This allows the user to enable or disable the high temperature alarm for
temperature sensor number 1 and 2. When enabled, high limit cutout feature
will force the controller output off if the temperature reading exceeds the
HIGH ALARM temperature setting. This is a non-latching condition, so once
the reading drops below the HIGH temperature ALARM setting, the controller
will resume normal operation.
Alarm time delay filter is factory set at 15 minutes.
Enable or disable
Factory default Enable
Setting/Range
Keystrokes for Enabling and Disabling
Hi TS ( Temperature Sensor Alarm) 1 and 2
High Temperature Sensor Alarm
Start
Press [SHIFT]
ALARM
SHIFT
Press the [DOWN] arrow
key until you see
Press [ENTER]
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Hi TS 1 = DIS
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
or
TEST
Hi TS 2 = DIS
Default = DIS
Use the [UP/[DOWN] arrow keys to select Disable or Enable
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new Hi TS Enable and/or Disable scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Hi TS 1 = nn
TEST
or
Hi TS 2 = nn
Press the [BACK] key to escape
to the mainscreen
ALARM
SHIFT
24
MONITOR
CONFIG
BACK
ENTER
Where nn is either Enable or Disable
TEST
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
4.2.11 High Temperature Alarm: Setting (Hi TS 1 and Hi TS 2)
Purpose
This allows the user to set the high temperature alarm setting for
temperature sensor number 1 and 2.
Alarm time delay filter is factory set at 15 minutes.
0°F to 200°F (–18° to 93°C)
Factory default
180°F (82°C)
Setting/Range
Keystrokes for Entering the Setpoint for Hi TS (Temperature Sensor) 1 and 2
High Temperature Sensor Setpoint
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press the [DOWN] arrow
key until you see
Press [ENTER]
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Hi TS 1 = 180’F
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
or
TEST
Hi TS 2 = 180’F
Default = 180’F
Use the [UP]/[DOWN] arrow key to change the digit that is blinking
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [RIGHT]/LEFT] arrow to to move to the next digit
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new Hi Ts Set point is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Hi TS 1 = xx’F
or
Hi TS 2 = xx’F
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
Where xx is the new set point
TEST
H58415 11/10
25
4.2.12 Low Load Current Alarm: Enable (Lo Load)
Purpose
This allows the user to enable or disable the low load current alarm to
detect current levels which are lower than a preset limit for the
application.
Alarm time delay filter is factory set at < 2 minutes.
Enable or disable
Factory default
Enable
Setting/Range
Keystrokes for Enabling and Disabling the Lo Load Current
Start
Press the [DOWN] arrow
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press [ENTER]
ALARM
SHIFT
TEST
key until you see
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Lo Load = ENA
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Default = ENA
TEST
Use the [UP/[DOWN] arrow keys to select Disable
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new Lo Load Enable or disable is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Lo Load = DIS
TEST
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
26
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
4.2.13 Low Load Current Alarm: Setting (Lo Load)
Purpose
This allows the user to set the low load current alarm level.
Alarm time delay filter is factory set at < 2 minutes.
0.3 A to 30 A or off
Factory default
1A
Setting/Range
Keystrokes for Entering the Lo Load Current Setpoint
Start
Press [SHIFT]
ALARM
SHIFT
Press the [DOWN] arrow
key until you see
Press [ENTER]
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Lo Load = 1.0 A
Default = 1.0 A
TEST
Use the [UP]/[DOWN] arrow key to change the digit that is blinking
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [RIGHT]/LEFT] arrow to to move to the next digit
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new Lo Load Setpoint is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Lo Load = xx A
or
Press the [BACK] key to escape to the mainscreen
Lo Load = xx A
Where xx is the new setpoint
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
27
4.2.14 Factory Default Settings (Load Defaults)
Purpose
To provide a quick method of re-setting the controller’s configuration
parameters to the factory default parameters.
N/A
Factory default
N/A
Setting
Keystrokes for Loading Defaults
Start
Press [SHIFT]
ALARM
SHIFT
Press the [DOWN] arrow
key until you see
Press [ENTER]
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Load Defaults
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Display
Are You Sure?
TEST
Press the [ENTER to select NO
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
No
TEST
or
Use the [UP/[DOWN] arrow keys to select Yes
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
Press the [ENTER]
ALARM
SHIFT
28
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
MONITOR
CONFIG
BACK
ENTER
TEST
Display
Copied
DigiTrace C910 Series Heat Trace Controller IOM
4.2.15 Ground-fault Current Alarm level (Hi GF Alarm)
Purpose
This allows the user to set the ground-fault current alarm level.
Exceeding this limit will trigger the alarm to indicate that a groundfault condition exists in the heating cable circuit.
Alarm time delay filter is factory set as immediate
20 mA to 100 mA
Factory default
20 mA
Setting/Range
Keystrokes for Entering the Ground Fault Alarm
Start
Press the [DOWN] arrow
Press [SHIFT]
ALARM
SHIFT
Press [ENTER]
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
key until you see
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Hi GFI = 20 mA
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Default = 20 mA
TEST
Use the [UP]/[DOWN] arrow key to change the digit that is blinking
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [RIGHT]/LEFT] arrow to to move to the next digit
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new HI GFI is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Hi GFI = xx mA
Where xx is the HI GFI current
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
29
4.2.16 Ground-fault Current Trip Level (Hi GF Trip)
Purpose
This allows the user to set the ground-fault current trip level.
Exceeding this limit will result in the output switch being latched off
and the Ground-fault Level Trip Alarm activated to indicate a ground
fault condition.
Alarm time delay filter is factory set as immediate
20 mA to 100 mA
Factory Default
30 mA
Setting/Range
Keystrokes for Entering the Setpoint for GF Trip
Ground Fault Trip Setpoint
Start
Press [SHIFT]
ALARM
SHIFT
Press the [DOWN] arrow
key until you see
Press [ENTER]
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
GFI Trip = 30 mA
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Default = 30 mA
TEST
Use the [UP]/[DOWN] arrow key to change the digit that is blinking
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [RIGHT]/LEFT] arrow to to move to the next digit
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new ground fault trip setpoint is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
GFI trip = xx mA
TEST
Where xx is the new current
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
30
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
4.2.17 Temperature Sensor Failure Mode
Purpose
This mode sets the controller to turn the output switch ON or OFF if
all selected temperature sensors fail.
On or off
Factory default
On
Setting/Range
Keystrokes for configuring TS FAIL Mode ON or OFF
Temperature Sensor Mode
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press the [DOWN] arrow
key until you see
Press [ENTER]
ALARM
TEST
SHIFT
MONITOR
ALARM
CONFIG
SHIFT
TEST
BACK
ENTER
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in console menus
Display
TS FAIL MODE = ON
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [UP]/[DOWN] arrow key to change from ON to OFF
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new TS FAIL MODE is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
TS FAIL MODE = OFF
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
31
4.2.18 Temperature sensor Control Mode (TS CLT Mode)
Purpose
The TS CONTROL MODE allows the selection of one of eight
possible temperature control modes for the controller. The different
modes allow redundant fail-safe temperature sensing.
1. TS1-Fail ON
2. Lowest Fail to Good
3. Lowest Fail ON
4. Average Fail to Good
5. Average Fail ON
6. TS2 Fail to TS1
7. TS Fail ON
8. TS1 Fail to TS
TS1-Fail On
Setting/Range
Factory
Default
Keystrokes for Changing the TS CLT Mode
Temperature Sensor Control Mode
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press the [DOWN] arrow
key until you see
Press [ENTER]
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in console menus
Display
TS CTL Mode = TS 1 - FAIL ON
Press the [ENTER]
Default mode shown
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [UP/[DOWN] arrow keys to view the list of control modes
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new TS CTL MODE is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TS CTL Mode = xx
TEST
Where xx is one of eight mode
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
32
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
1. TS 1-Fail ON
2. Lowest Fail to Good
3. Lowest Fail ON
4. Average Fail to Good
5. Average Fail ON
6. TS2 Fail to TS1
7. TS Fail ON
8. TS 1 Fail to TS 2
DigiTrace C910 Series Heat Trace Controller IOM
4.2.19 Firmware Version
Purpose
Setting/Range
This menu displays the revision level of the firmware programmed
into the controller.
N/A
Factory default
N/A
Keystrokes for Viewing the Software Version
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press [ENTER]
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [DOWN] arrow
key until you see
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
VERSION = V 3.xx
Press the [BACK] key to escape to the mainscreen Where xx is the version number
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
TEST
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33
4.2.20 Passcode
Purpose
The four digit numeric PASSWORD stops unauthorized users from
modifying the controller’s configuration parameters using the
Operator Console.
0000 to 9999
Factory default
0000
Setting/Range
Keystrokes for Entering a Password
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press the [DOWN] arrow
key until you see
Press [ENTER]
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in console menus
Display
PASSWORD = 0
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Default Password = 0
TEST
Use the [UP]/[DOWN] arrow key to change the digit that is blinking
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [RIGHT]/LEFT] arrow to to move to the next digit
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new password is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
PASSWORD = xxxx
TEST
Where xxxx is the new password
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
34
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
4.2.21 Alarm Output Normal State
Purpose
Setting/Range
Configures both the alarm output relays (dry contact and AC alarm)
for normally open or normally closed operation. The normal
condition is assumed to be when the HTC is powered and no
alarms exist.
Normally Open
Factory default
Normally closed
(N.O.) or Normally
Closed (N.C.)
Keystrokes for changing ALARM OUTPUT from N.C. to N.O
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press the [DOWN] arrow
key until you see
Press [ENTER]
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM OUTPUT = N.C.
TEST
Use the [UP/[DOWN] arrow keys to select N.C. or N.O.
ALARM
SHIFT
MONITOR
ALARM
CONFIG
SHIFT
TEST
BACK
ENTER
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key, the new ALARM OUTPUT state will scroll across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
ALARM OUTPUT = N.O.
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
35
4.2.22 Communications Setup
Purpose
Defines the communications language used by the controller to
communicate with other devices. The DigiTrace C910-485 only
communicates using Modbus Protocol.
See DigiTrace C910-485
Factory
HTCBus
Communication Parameters Table default
Setting/Range
Keystrokes for Communication Setup
Start
Press [SHIFT]
ALARM
SHIFT
Press the [DOWN] arrow
key until you see
Press [ENTER]
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Communications Setup
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Display
TEST
Protocol = HTCBUS
ModBus RTU
ModBus ASCII
Note: HTCBUS is a factory use only
Display
Use the [UP]/[DOWN] arrow key to select a communication parameter
ALARM
SHIFT
MONITOR
ALARM
CONFIG
SHIFT
TEST
BACK
MONITOR
CONFIG
BACK
ENTER
TEST
ENTER
Modbus ADDR = 1
Display
Modbus SUB ADDR = 48
Display
Press the [ENTER] key to select the parameter
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Baud Rate = Auto
TEST
9600
4800
2400
1200
600
300
Display
Parity = None
EVEN
ODD
Use the [UP]/[DOWN] arrow key to change the digit that is blinking
Display
ALARM
SHIFT
MONITOR
ALARM
CONFIG
SHIFT
TEST
BACK
MONITOR
CONFIG
BACK
ENTER
Hardware = RS-485
TEST
ENTER
Use the [RIGHT]/LEFT] arrow to to move to the next digit
ALARM
SHIFT
MONITOR
ALARM
CONFIG
SHIFT
TEST
BACK
MONITOR
CONFIG
BACK
ENTER
Display
Profile = Auto
TEST
ENTER
Drivers:
Auto
RS-485
RS-232
Modem
3-Wire RS-232
RS-485
1200 Modem
300 Modem
Display
Press the [ENTER] key until the new Communicationp Parameter
is scrolling across the screen
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Tx Delay = 0.06 s
TEST
If you need to change another Communication Setup parameter then use the
[UP/DOWN] arrow keys followed by the [ENTER] key.
or
Press the [BACK] key to escape to the main screen
ALARM
SHIFT
36
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
DigiTrace C910-485 Communication Parameters
Parameter
Protocol
Settings
HTCBus (default)
Modbus RTU
Modbus ASCII
Modbus Addr
1 - 247
Modbus Baud
Rate
Auto, 9600, 4800, 2400
1200, 600, 300.
Default =Auto
Parity
NONE, EVEN, ODD
Hardware
RS-485
Driver
Auto, RS-485, RS-232,
Modem.
Profile
Auto, 3-wire RS232,
RS485, 1200 BAUD
Modem, 300 BAUD
Modem
0.00 to 2.50 seconds
Tx Delay
DigiTrace C910 Series Heat Trace Controller IOM
H58415 11/10
Notes
If you are communicating directly with the
controller using a different device, select
the MODBUS protocol.
For a detailed description of the
controller’s MODBUS mapping please
refer to DigiTrace C910 Series Heat
Trace Controller.
Note: HTCBus is for factory use
only.
Set the communications address as
desired. Each controller on the serial
communication bus must have its own
unique address.
Select the data rate to be compatible with
other devices that will be connected to
the controller for communications
purposes. It is recommended that the
setting be set to AUTO. The controller
will automatically select a BAUD RATE
that is compatible with the
communications interface installed.
Defines the type of parity bit to be used
with MODBUS communications.
Select the desired type of parity. Note
that PARITY can only be selected when
using MODBUS protocol.
Identifies the type of communications
interface installed in the C910.
Defines the way in which the controller’s
program communicates with the
communications interface.
Defines the way in which the controller’s
program supports communications
handshaking and communication
interface signals.
Allows a programmable delay between
the receipt of a communications
message and the controller’s reply. In
some applications, it may be necessary
to delay the controller’s response to an
inquiry for a short period of time to allow
external devices to start up, stabilize
and/or synchronize.
37
4.2.23 Auto-Cycle: Enabling
Purpose
The autocycle function applies power to the heating cable circuit for
approximate 10 seconds at the selected interval. It is used to test the
integrity of the heating cable circuit.
Note: Although the autocycle function helps monitor the functionality
of the heating cable circuits it does not eliminate the need for preventive
maintenance as detailed in the heating cable operating manuals.
Enable or disable
Factory default
Disable
Setting/Range
Keystrokes for Enabling and Disabling Auto-Cycling
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press the [DOWN] arrow
key until you see
Press [ENTER]
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Auto-Cycle = DIS
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Default = DISABLE
TEST
Use the [UP/[DOWN] arrow keys to select ENAble
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new Auto-Cycle (enable or disable)
is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Auto-Cycle = ENA
TEST
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
38
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
4.2.24 Auto-Cycle: Interval
Purpose
Setting/Range
Set the interval for running the autocycle procedure
1 to 240 [minutes or hours, selected
Factory default
in the Auto-cycle units menu.]
8
Keystrokes for Entering Auto Cycling Interval
Start
Press the [DOWN] arrow
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press [ENTER]
ALARM
TEST
SHIFT
key until you see
MONITOR
CONFIG
BACK
ENTER
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
You are now in the console menus
Display
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Auto-Cycle Interval = 8
Default = 8 hours
TEST
Use the [UP]/[DOWN] arrow key to change the digit that is blinking
ALARM
SHIFT
MONITOR
ALARM
CONFIG
SHIFT
TEST
BACK
MONITOR
CONFIG
BACK
ENTER
TEST
ENTER
Use the [RIGHT]/LEFT] arrow to to move to the next digit
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key until the new auto-cycle Interval is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Auto-Cycle Interval = xxx
Where xxx is the new interval time
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
39
4.2.25 Auto-Cycle: Units
Purpose
Setting/Range
Select the Autocycle interval time units.
Minutes or hours
Factory default
Hours
Keystrokes for Changing Auto-Cycle Units
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Press the [DOWN] arrow
key until you see
Press [ENTER]
ALARM
TEST
SHIFT
MONITOR
ALARM
CONFIG
SHIFT
TEST
BACK
MONITOR
CONFIG
BACK
ENTER
TEST
ENTER
You are now in the console menus
Display
Auto Cycle Units = HOURS
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Default Hours
TEST
Use the [UP/[DOWN] arrow keys to select between hours or minutes
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key , the new units will be scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Auto Cycle Units = nnnnn
TEST
Where nnnn is either hours or minutes
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
40
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
4.2.26 Contactor Count
Purpose
Generates an alarm if the number of off-to-on transitions of a
contactor reaches or exceeds the Contactor Count Alarm setting.
This serves as a method to perform preventative maintenance on the
contactor before a failure is likely to occur.
0 to 999,999
Factory default
200,000
Setting/Range
Keystrokes for Changing Contactor Count
Start
Press [SHIFT]
ALARM
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
Press the [DOWN] arrow
key until you see
Press [ENTER]
MONITOR
CONFIG
BACK
ENTER
ALARM
MONITOR
CONFIG
BACK
ENTER
TEST
SHIFT
TEST
SHIFT
TEST
You are now in the console menus
Display
Press the [ENTER]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Contactor Count = 200000
Default 200000
TEST
Use the [UP/[DOWN] arrow keys to select between hours or minutes
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [RIGHT/LEFT] arrow keys to move to the next digit hours or minutes
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [ENTER] key , the new contactor count is scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Contactor Count = xxxxxx
Where xxxxxx the new contactor count
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
DigiTrace C910 Series Heat Trace Controller IOM
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
41
4.2.27 Monitor and Maintenance Menus
Purpose
The Monitor menu displays the measured and stored readings.
You can also reset counters from this menu.
See DigiTrace C910 Monitoring and
Factory default
N/A
Maintenance Parameters table.
Setting/Range
Keystrokes for Entering Monitor and Maintenance Menus
START
Press [BACK]
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
TEST
BACK
You are now in the
Monitor/Maintenance menus
Use the[DOWN] arrow key to access the
ST Tracing and Display Test
Use the[DOWN] arrow key to view
the following parameters
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Use the[DOWN] arrow key to access the Maintenance Data
Control Temp =
TS 1 Temp
TS 2 Temp
Load Current
GFI Current
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Resetting
Press [ENTER] key
Min CTL Temp
Max CTL Temp
TS 1 Min Temp
TS 1 Max Temp
TS 2 Min Temp
TS 2 Max Temp
Contactor Cycle Count
In Use (hours)
Time Since last RESET (Hours)
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Use the [DOWN] arrow key to select Yes
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Press [ENTER] key
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Press the [BACK] key to escape to the mainscreen
ALARM
SHIFT
42
MONITOR
CONFIG
BACK
ENTER
TEST
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
DigiTrace 910 Monitoring and Maintenance Parameters
Monitored variables
Description
CTL temp
Control Temp
This temperature is the value that the
controller is reading from the RTD
connected to its TS 1 input.
This temperature is the value that the
controller is reading from the RTD
connected to its TS 2 input, if the sensor is
being used.
Displays the current being drawn by the
heating cable. (A)
Displays the ground-fault current being
drawn by the heating cable. (mA)
TS1 temp
TS2 temp
Load current
GFI current
Maintenance Tests
The TEST TRACING feature temporarily
overrides the temperature control, and
powers the heating cable circuit for 30
seconds without having to modify the
CONTROL SETPOINT temperature or any
other configuration parameter.
The DISPLAY TEST feature provides an
easy method of illuminating each display
segment and all the LEDs of the Operator
Console to ensure that they are functioning
properly.
Trace testing
Display test
Recorded Values
This feature indicates the maximum and
minimum temperatures recorded by the
C910 since the last time the values were
reset:
Max Control temp
Min Control temp
TS 1 Max Temp
TS 1 Min Temp
TS 2 Max Temp
TS 2 Min Temp
This feature indicates the total number of
off-to-on transitions a contactor has made
since the last time the CONTACTOR
CYCLE COUNTER was reset. (See
keystroke procedure for resetting)
Indicates the total hours in use of the
controller since its initial operation or since
it was last reset.
This feature indicates the total hours in use
of the controller since the last reset.
This feature indicates the highest
instantaneous ground-fault current
measured since the last time the PEAK
GROUND-FAULT CURRENT was reset.
This current value is written to the
controller’s non-volatile memory once
every 24 hours or whenever any
maintenance data is reset by the user.
Temperature values
Contactor cycle count
Time in use
Time since last reset
Peak ground-fault current
DigiTrace C910 Series Heat Trace Controller IOM
H58415 11/10
43
4.2.28 Acknowledging and Resetting Alarms
Purpose
To acknowledge and reset any alarm conditions that may exist. Use
the Up / Down Arrow keys to examine the next/previous active alarms.
See Alarm Filter Times
Factory default
N/A
Setting/Range
Keystrokes for Acknowledging and RESETING Alarms
Start
Press [SHIFT]
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
Display
Press [TEST]
ALARM
TEST
SHIFT
MONITOR
CONFIG
BACK
ENTER
Alarm(s) will now be scolling
across the screen
TEST
You are now in the alarm screen
Use the [UP/[DOWN] arrow keys to view multiple alarms
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press [ENTER] key to RESET the alarm scrolling across the screen
Display
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
RESET ?
TEST
Use the [UP/[DOWN] select YES, NO or ALL
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
ALARM
SHIFT
TEST
MONITOR
CONFIG
BACK
ENTER
TEST
Press [ENTER] to select your either YES, NO or ALL alarms
ALARM
SHIFT
MONITOR
CONFIG
BACK
ENTER
TEST
Note: If all alarms are cleared then you will see the following
message scrolling across the screen
Display
No Alarms
If there are more alarms to clear then you will need to use the [UP/DOWN]
arrow keys and repeat the process.
44
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
Alarm Filter Times
Alarm Type
Filter Time
Lo TS 1 and 2
15 minutes
Hi TS 1 and 2
15 minutes
Lo load current
2 minutes
Hi ground-fault alarm
10 seconds
Hi ground-fault trip
< 1 second
OPEN / SHORTED TS 1 and 2
10 seconds
Contactor count
< 1 seconds
Switch failure
2 minutes
DigiTrace C910 Series Heat Trace Controller IOM
H58415 11/10
45
Section 5 Troubleshooting
The DigiTrace C910 may be used as an effective troubleshooting tool to pinpoint
problem areas of heating cable circuits. Described below are a few of the more common
problem areas, their symptoms, and parameters to check to determine the actual faulty
portion of the heating cable circuit.
Symptom
RTD failure alarm
Seemingly incorrect
temperature
Probable Cause
RTD is not a 3-wire 100 Ω
Platinum
Damaged RTD sensor or
extension cable
Incorrectly wired
Incorrect RTD used
Damaged RTD sensor or
connection cable
C910 not functioning
correctly
Unstable or bouncing
temperature
High temperature
TS 1/ TS 2
LOW temperature
TS 1/TS 2
46
H58415 11/10
Bad, damaged or incorrectly
installed RTD extension
wire.
Terminal connections are
not tight
RTD or extension cable
damaged
Alarm temperature setting
too close to maintain
temperature
Flow of hot water through
pipe
Incorrect heating cable
wiring
Alarm temperature setting
too close to maintain
temperature
Heating cable not sized
properly for the application
Damaged, wet, or missing
thermal insulation
Corrective Action
Install correct RTD
Install new RTD and/or
cable
Re-install RTD
connections
Install correct RTD
Install new RTD and/or
cable
Verify correct reading input
Connect a 100 Ω resistor
across the source or sense
terminal and common.
Insert a jumper between
the source and sense
terminals.
Apply power to the
controller. The indicated or
displayed temperature
should be about 32°F
(0°C).
Wire used for extension of
the RTD should be threewire, twisted and shielded
with the shield grounded at
the controller only. Each of
the three lead wires must
be of the same gauge.
Verify tightness of
connections
Install new RTD and/or
cable
Increase setting
Verify heating cable wiring
Decrease setting
DigiTrace C910 Series Heat Trace Controller IOM
Control TS failure
Ground-fault alarms
Failure of the RTD
designated as the
controlling sensor.
Incorrect or damaged field
wiring
Damaged temperature
sensors
Incorrect installation, wet
system components or
damaged cables.
Floating ground
Low current
Switch failure
Contactor count
DigiTrace C910 Series Heat Trace Controller IOM
Alarm setting too close to
normal leakage current
Low or no source voltage
Damaged or inoperative
heating cable
Open connection—wiring
problem
contactor failed open
Output switch has failed
“closed”
Number of off-to-on
transitions of a contactor
has exceeded the
CONTACTOR COUNT
ALARM setting and the
contactor should be
replaced.
H58415 11/10
Check setting for TS FAIL
MODE the output switch
may be latched off or on
until this failure is
corrected
Re-install RTD
connections
Install correct RTD.
Perform heating cable
commissioning tests
outlined in the heat cable
operation manuals.
Check that the heating
cable circuit neutrals return
to the controller and are
not connected directly to
the distribution panel.
Verify correct power
distribution
Repair or replace heating
cable
Verify correct power
distribution wiring
Replace or repair controller
Replace or repair controller
Inspect contactor and
replace if necessary.
47
Appendix A: Proportional Ambient Sensing Control (PASC)
PASC takes advantage of the fact that the heat loss from a pipe is proportional to the
temperature difference between the pipe and the ambient air. This is true regardless of
heating cable, insulation type, or pipe size. Once the heat tracing and insulation on a
pipe has been designed to balance heat input with heat loss and maintain a particular
temperature, the main variable in controlling the pipe temperature becomes the ambient
air temperature.
The DigiTrace C910 has a control algorithm that uses the measured ambient
temperature, desired maintain temperature, minimum ambient temperature assumption
used during design, and size of the smallest pipe diameter to calculate how long the
heating cable should be on or off to maintain a near-constant pipe temperature. The
power to the heat tracing is proportioned based upon on the ambient temperature. If the
ambient temperature is at or below the “minimum design ambient plus 3°F” the heating
cable will be on 100%. If the measured ambient is at or above the “maintain
temperature –3°F” the heating cable will be on 0%. For any measured ambient between
“minimum design ambient” and “maintain temperature,” the heating cable will be on a
percentage of the time equal to (maintain temperature – measured ambient) / (maintain
temperature – minimum design temperature).
48
H58415 11/10
DigiTrace C910 Series Heat Trace Controller IOM
Tyco and DigiTrace are trademarks of Tyco Thermal Controls LLC or its affiliates.
Modbus is a trademark of Modbus Organization Inc.
Worldwide Headquarters
Tyco Thermal Controls
7433 Harwin Drive
Houston, TX 77036
USA
Tel: (800) 545-6258
Tel: (650) 216-1526
Fax: (800) 527-5703
Fax: (650) 474-7711
info@tycothermal.com
www.tycothermal.com
DigiTrace C910 Series Heat Trace Controller IOM
Important: All information, including illustrations, is believed to be reliable. Users, however,
should independently evaluate the suitability of each product for their particular application. Tyco
Thermal Controls makes no warranties as to the accuracy or completeness of the information,
and disclaims any liability regarding its use. Tyco Thermal Controls' only obligations are those in
the Tyco Thermal Controls Standard Terms and Conditions of Sale for this product, and in no
case will Tyco Thermal Controls or its distributors be liable for any incidental, indirect, or
consequential damages arising from the sale, resale, use, or misuse of the product.
Specifications are subject to change without notice. In addition, Tyco Thermal Controls reserves
the right to make changes—without notification to Buyer—to processing or materials that do not
affect compliance with any applicable specification.
H58415 11/10
49
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