I-688 GSE Gas Transmitter Installation, Operation and Maintenance

I-688 GSE Gas Transmitter Installation, Operation and Maintenance
BRASCH MANUFACTURING COMPANY, Inc.
GAS TRANSMITTER
Installation / Operation Manual
Brasch Gas Transmitter with
Digital Signal Output
If you have questions concerning the installation
or operation of this transmitter not answered by the
manual, please call our Customer Service Department
at 1-660-327-4550. FAX: 1-660-327-4560
Please have the following information available:
Model number (located on the front label)
Serial number (located on the front label)
Date of manufacture (on front label)
Name of distributor where purchased
Brasch Manufacturing Company, Inc.
2310 Millpark Drive
Maryland Heights, Missouri 63043
(866) 882 -1677 Fax (314) 291-0646
FEB, 2008
JAN, 2003
IOM I-688
Table of Contents
Operation Safety Notice _______________________________________________
iii
Quick Installation Guide _______________________________________________
iv
Part One – Installation
•
Mounting the Transmitter ____________________________________________
1
Part Two – Technical Specifications
•
•
•
•
•
•
•
Description ______________________________________________________
2
Product Specifications
_____________________________________________
2
Target Gas Specifications ___________________________________________
3
Description of Front Panel Indicators ___________________________________
3
How the Transmitter Senses the Target Gas ____________________________
3
Obtaining the Best operation _________________________________________
3
Assembly View and Wiring Diagrams __________________________________
4
Part Three – Troubleshooting and Maintenance
•
•
•
•
Testing the Response to the Target Gas ________________________________
8
Checking and Replacing Fuses _______________________________________
9
Replacing the Sensor _______________________________________________
9
Suggested Repair Parts _____________________________________________
9
Part Four – Common Installation/Operation Mistakes
•
•
•
Transmitter Gas Type Set Wrong _____________________________________
10
Transmitter I.D. Set Wrong __________________________________________
10
Transmitter Mounted In An Unsatisfactory Location ________________________
10
Part Five – Limited Warranty
•
•
Warranty Statement _______________________________________________
11
Service and Repair Procedures _______________________________________
11
Part Six – Appendix
•
•
•
Model Numbers and Descriptions _____________________________________
12
Fig. 5: Transmitter Gas Type and I.D. Settings ___________________________
12
Fig. 6: Suggested Transmitter Mounting Method __________________________
13
ii
Operation Safety Notice
Certain procedures and operations detailed in this manual require that specific precautions be
taken prior to beginning the procedure or operation. When precautions are required, a notice
will be printed in an appropriate location in the manual. The user is urged to read and
understand all such notices.
Types of Notices
Three types of notices may be used in this manual to describe the severity of the situation
encountered.
WARNING
This notice indicates that conditions exist that could cause personal injury or loss
of life.
Caution
Conditions exist that could cause damage to the equipment or other property.
Note
Special consideration should be given to the procedure or operation or an
unexpected operational result could occur.
iii
QUICK INSTALLATION GUIDE
Please read this entire manual before attempting to install and operate this gas
transmitter. But, if you do not read the manual, this Quick Installation Guide will
provide the basic steps necessary to install and operate the transmitter. In each step,
reference is made to the portion of the manual where more complete information can
be obtained.
Follow the basic steps listed below to install and operate your Brasch Gas Transmitter. However, we
recommend that you read the complete manual to obtain a more detailed description of the transmitter’s
capabilities.
Installing and operating your Brasch transmitter:
Step 1
Determine the location for mounting your transmitter(s). The location(s) may be indicated on the
architectural drawing. Also, the owner or designer of the facility may be consulted. Mounting guidelines can
be found on page 1 of this manual.
Step 2
WARNING
This transmitter may require the use of voltage levels high enough to cause fatal injuries.
Proper procedures must be followed anytime work is performed on this unit.
Only Qualified Personnel Should Attempt To Install, Maintain Or Service This
Equipment.
The transmitter can operate from 24 VAC or +/- 25 VDC. If the transmitter provides a signal to a
customer supplied building management system, or a Brasch GDCP-0, GDCP-1, GDCP-2, or GDCP-3
control panel, the transmitter is connected to 24VAC. This voltage is provided by a step-down
transformer connected to the building’s AC line.
Provide a dedicated circuit, at the required 24 VAC and 5 VA, at each transmitter mounting location. Follow
all national and local wiring codes. The wiring should be at least 14 AWG. A conductor, connected to the
earth ground, should also be provided. The circuit must include a disconnect switch located within easy
reach of the transmitter.
To access the power connections, it is not necessary to remove the transmitter’s housing cover. All
connections to the transmitter are made using the wiring that exits through the conduit fitting on the top of
the transmitter. See the wiring diagram on page 5 and the suggested mounting method on page 13.
CAUTION
Operating this transmitter with the incorrect voltage and power requirement can cause
internal electrical components to overheat and fail. Operation under these conditions will
void the manufacturer’s warranty, and the installer will be responsible for any damage that
occurs.
Contact Brasch Manufacturing Company before connecting power to the transmitter if you
are unsure of the correct power requirement.
iv
Connect both the black and red wires coming out of the top of the transmitter to one lead from the
transformer’s 24 VAC secondary. Connect the remaining transformer lead to the green wire from the
transmitter housing.
If the transmitter is part of a Brasch GSE Detector, the controller supplies the operating power to each
transmitter in the system. Use a six conductor shielded cable, with color-coded conductors, to connect the
power. Three of these conductors provide the +25 volts, -25 volts and Ref. Com. power to the transmitter.
The remaining three conductors carry the signal from the transmitter to the controller. See page 6 for typical
wiring diagrams and suggestions for appropriate color-coded cables. If possible, choose a cable with color
coded conductors that follow the suggested color code scheme listed on the drawings.
CAUTION
It is very important that the power and signal connections between each transmitter and
between the transmitters and the Brasch controller be correct. If the connections are wired
incorrectly, damage to both the transmitters and the controller will occur.
Use a cable with color-coded conductors and make sure that the same conductor connects
to the same terminal on TS1 of each transmitter and the controller.
DO NOT APPLY POWER TO THE TRANSMITTER OR CONTROLLER UNLESS YOU
ARE SURE THAT THE CONNECTIONS ARE CORRECT.
The transmitter will be shipped with six color coded wires exiting the top of the housing through a conduit
fitting. If you have chosen color coded conductors that match the wire colors, connect the cable conductors
to the wires of the same color. If your cable conductors do not match the wire colors, assign a cable
conductor color to each wire and make a list of this assignment. Follow this color assignment when
connecting any other transmitters in the system. All transmitters share the same conductors back to the
controller. Therefore, a six conductor cable can be connected from transmitter to transmitter, or from
transmitter to the controller, as the situation dictates. Follow the wiring diagrams on page 6 to determine the
proper connections at the control panel, detector or building management system.
Refer to page 2 for product specifications.
Step 3
The transmitter conveys its sensor signal to the central controller in one of two ways. If the transmitter
provides a sensor signal to a customer supplied building management controller, or GDCP-0, -1, -2 or –3
panel, the signal travels over a 4–20 ma. current loop. A two conductor, shielded cable must be
provided for each transmitter in the system. Each cable terminates at individual inputs at the customer’s
controller. At each transmitter, the positive conductor connects to the yellow wire from the transmitter.
The reference common conductor connects to the gray wire from the transmitter. See the wiring diagrams
on pages 5 and 7.
If the transmitter is part of a GSE Detector, the sensor signal is transferred as a digital voltage over three
conductors connected to the brown, blue and white wires from the transmitter housing. All transmitters
share the same three conductors. Therefore, a cable is connected from transmitter to transmitter, or
transmitter to the controller, as the situation dictates. See the wiring diagram on page 6 for more
information. Also, please read the caution notes in Step 3 again before applying power.
Step 4
Once you are sure that the wiring connections are correct, apply power to the transmitter circuit. When
power is first applied, the green power indicator will glow indicating that the transmitter is active. The first
five minutes after applying power is a “warm up” period. At the end of this period, the transmitter will begin
sending signals to the Brasch controller or building management controller.
v
PART ONE – INSTALLATION
Mounting the Transmitter
The ability of the transmitter to efficiently sense the target gas depends greatly upon proper selection of the
mounting location. This transmitter monitors the area around it by sampling the air that passes by the
sensor. Therefore, the transmitter should be positioned where it can sample air that contains a target gas
concentration representative of the average value in that area.
When determining the mounting location, give special consideration to the following guidelines.
•
•
•
•
•
•
•
•
•
Use one transmitter for each 7000 to 9000 square feet of area to be monitored.
The types of gases the transmitter is designed to monitor have densities approximately equal to that of
air. For maximum safety, mount the transmitter at the average breathing height.
Avoid mounting locations that would not be representative of the average gas value in that area.
Locations near doorways, fans, ventilation inlets and outlets and areas with high volume of air flow
should be avoided.
Avoid locations that would allow direct contact with water. Mounting the transmitter near outside garage
doors may allow rain to hit the transmitter when the door is open.
Avoid locations that are directly in the outlet air vents of heaters or air conditioners.
Do not allow exhaust from engines to flow directly on the transmitter. This transmitter is designed to
sense gas concentrations that are 300 to 1000 times less concentrated than the gas levels found in
engine exhaust. Also, engine exhaust contains high levels of other components. These components
can shorten the useful life of the sensor if they contact the sensor before being diluted by the room air
volume.
Avoid mounting locations where the transmitter may be hit by passing vehicles. If the transmitter must
be mounted in these locations, provide a shielding cage around the transmitter for protection.
Do not restrict the air flow to the transmitter housing.
Do not mount the transmitter near containers of chemicals such as gasoline, kerosene, alcohol or other
cleaning fluids. High level concentrations of these chemicals may be mistaken as the target gas b y the
sensor and cause false readings. Also, some welding gases may cause false readings.
The transmitter is attached in the mounting position in one of three ways.
•
•
•
Attach the housing to conduit using appropriate conduit fittings. If you use this method, make sure that
the conduit is securely attached to a solid support. Firmly tighten the threaded nuts on the conduit
fittings inside the transmitter housing so they will not loosen over time.
Attach the housing to a four inch square conduit box using the ½ inch fitting provided with the
transmitter. Make sure that the conduit box is firmly fastened to the mounting surface with screws.
Securely tighten the fitting nut on the inside of the conduit box so it will not loosen over time. Fig. 6, in
the appendix, illustrates how the box is connected to the transmitter.
Attach the housing to a solid support base using screws through the internal housing mounting holes.
This method requires removal of the housing cover to gain access to the mounting holes. A mounting
hole is located at the top and bottom of each of the housing end walls.
Find a flat area at least 6” high by 6” wide and place the back of the open housing flat against it. Using
a pencil, or other slender marking tool, mark the location of the four mounting holes using the housing
as a template. Start the screws without the housing in place to avoid any possibility of damage to the
housing or circuit board. Remove the screws, place the housing in position and install the mounting
screws. Do not over-tighten the screws and crack the plastic housing. Being careful not to damage the
printed circuit board, replace the housing cover and securely tighten the four cover retaining screws.
1
.PART
TWO – TECHNICAL SPECIFICATIONS
Description
The Brasch Gas Transmitter is designed to function as a gas sensor and signal transmitter. The transmitter
consists of a sensor and digital control circuitry. A 4-20 ma. analog output circuit is available to provide
signals to a customer supplied building management controller. A microprocessor monitors the signal from
the sensor circuitry, converts that signal to a digital value and, on demand, transfers the digital signal to a
Brasch GSE Detector. In the case of the 4-20 ma. circuit, the digital signal is converted to a current and
sent over a two wire current loop to the building management controller.
The sensor used in the transmitter operates on the electrochemical principle. A current is produced when
the target gas reacts chemically with water inside the sensor. This small current is changed to a voltage by
the transmitter’s circuitry, amplified and changed to a digital signal by the microprocessor. This digital signal
is proportional to the gas concentration present at the sensor. When requested by the Brasch GSE
Detector, the digital signal is sent to the controller. The transmitter then updates the sensor reading and
stores it for the next request.
The transmitter’s circuitry consists of a printed circuit board mounted inside a polycarbonate housing. The
housing has a NEMA 1 rating. A port is provided at the top of the housing cover that allows the sensor
access to the ambient air.
Product Specifications
Power:
+/- 25 VDC Input Voltage
0.2 Amps
24 VAC
Input Voltage
50/60 Hz.
0.200 Amps
Installation Category:
II (local level, over-voltage transients less than 500 volts)
Operating Temperature:
Storage
-50° C to 120° C (-58° F to 248° F)
Operating
-15° C to 40° C (5° F to 104° F)
Humidity:
10% to 90% (non-condensing)
Front Panel Indicators:
`
Dimensions:
Power (green LED)
Weight:
1 lb. ( 0.5 Kg.)
Housing:
Gray, NEMA 1, polycarbonate plastic
Agency Acceptance:
ETL listed to UL 3111-1
4.8” W x 4.72” H x 2.16” D (12.2 cm W x 12 cm H x 5.5 cm D)
2
Target Gas Specifications
The Brasch Gas Transmitter is available for monitoring several different target gases. Various regulatory
agencies have determined the threshold concentrations at which these gases become dangerous. Brasch
Manufacturing Company has designed their transmitters so that the measurement ranges for each target
gas meet the agencies’ requirements.
Each target gas, for which Brasch currently produces a transmitter, is listed below along with the relevant
concentration specifications.
Carbon Monoxide
Full Scale Span:
200 PPM
Resolution:
1 PPM
Nitrogen Dioxide
Full Scale Span:
10.0 PPM, (BMS); 2.0 PPM, (GDCP-0, 1, 2, 3)
Resolution:
0.05 PPM
Oxygen
Full Scale Span:
25.0 %
Resolution:
0.1 %
Description of Front Panel Indicators
The only indicator on the transmitter’s front panel is the green power lamp. This lamp glows continuous
whenever power is present.
How the Transmitter Senses the Target Gas
Ambient air surrounding the transmitter contacts the sensor through the sensing port at the top of the
housing cover. Any target gas present in this air causes a response from the sensor. If the transmitter is
located properly, the sensor will respond to the average amount of the target gas present in the area. For
help in properly locating the transmitter, please read the mounting guidelines on page 1.
The transmitter monitors the actual concentration of the target gas exposed to the sensor. This act ual value
may be different than the time-weighted-average values displayed by most of the personal gas monitors.
Please take this difference into account when comparing the response of the two units.
Obtaining the Best Operation
Carbon Monoxide and/or Nitrogen Dioxide Transmitters
These transmitters are placed in areas to monitor for a rising concentration of the target gas.
No two installations will be exactly the same. The number of gas producing sources, air flow patterns inside
the room, the total room volume and the exact location of the transmitter(s) influence how effective each is in
sensing the target gas concentration.
3
In some cases, you may find that a target gas source is too close to the transmitter. Consider other
mounting locations for the transmitter, or move the gas source farther away.
Oxygen Detector
This transmitter is placed in areas to monitor for a decreasing concentration of oxygen. Usually a controller
will respond by activating a ventilation system to bring fresh air, at a normal oxygen concentration, into the
area being monitored. In other instances, the controller may only be used to sound an alarm allowing
workers to evacuate the area.
The number of oxygen depleting sources, air flow patterns in the area, the total room volume and the
transmitter location influence the effectiveness of the transmitter.
Under most conditions, the only variable that the installer can change will be the location of the transmitter.
Please see page 1 for mounting guidelines.
Assembly View and Wiring Diagrams
The following assembly view and wiring diagrams should be referenced during installation.
Fig. 1: Assembly View: Sensor P.C. Board to Transmitter Cover
4
Fig. 2: Wiring Diagram, Others BMS to Remote Transmitter
5
Fig. 3: Wiring Diagram, Brasch GSE Detector to Remote Transmitter
6
Fig. 4: Wiring Diagram, Brasch Control Panel to Remote Transmitter
7
PART THREE – TROUBLESHOOTING and MAINTENANCE
Testing the Response to the Target Gas
Carbon Monoxide or Nitrogen Dioxide Transmitters
Testing these transmitters require that the target gas be applied to the sensor using one of two methods.
Gas can be applied from a tank of air containing a known concentration of the target gas, or a level of target
gas sufficient to activate the control system can be produced from the exhaust of an operating engine. Use
a gasoline engine to produce CO and a diesel engine to produce nitrogen dioxide.
Of the two methods of obtaining test gas, the simplest is operating an engine in the vicinity of the transmitter
under test. The engine should be placed about 10 feet away from the transmitter so that exhaust gases will
not contact the transmitter directly.
Caution
Allowing the transmitter to come in direct contact with undiluted exhaust gases will decrease
the expected useful lifetime of the sensor. The high concentration of acids and other
components in the exhaust gas will overload the activated carbon filter inside the sensor and
will increase the effects of interfering gases upon the accuracy of the sensor.
If the sensor becomes damaged, it must be replaced with a new sensor calibrated at the
factory.
The engine should be allowed to operate until the level of the target gas is sufficient to activate the
ventilation system. Depending upon the volume of the area where the transmitter is located, this may take
from 10 to 30 minutes.
Using test gas applied from a tank has the advantage of speed as well as assurance that the transmitter is
responding to the target gas. However, the gas must be applied directly to the sensor if the response is to
be close to the value present in the tank. The test gas can not be allowed to become diluted by the air in the
room before it comes in contact with the sensor. This reduces the concentration to a level too low to give
the desired result.
While a test gas mixture is readily available for CO, gas mixtures containing low PPM levels of nitrogen
dioxide is not available.
When testing the CO sensor response using test gas from a tank, the gas is allowed to flow through a
flexible hose into a plastic fitting that is placed directly over the sensing port. Allow 2 to 3 minutes for the
sensor to respond to the test gas. If the test gas has the required concentration of CO, the controller should
respond by displaying a concentration and activating the appropriate ventilation component.
Because of the uncontrolled conditions in the test area, the controller will probably not indicate a
concentration equal to the CO value of the test gas. However, sufficient response can be obtained to
determine that the system is working.
8
Oxygen Detectors
The response of the oxygen sensor is checked by exposing the transmitter to room air having a normal
concentration of oxygen. Ambient air should contain 20.9 % oxygen. Therefore, if the controller displays a
reading close to 20.9 %, the transmitter is responding correctly to the oxygen level in the area.
If the ventilation system operation is to be tested, a tank containing the appropriate concentration of oxygen
must be used. Flow from this tank is channeled through a flexible hose into a plastic fitting. This fitting is
then placed over the sensing port of the transmitter housing. Allow 2 to 3 minutes, depending upon
conditions in the test area, for the sensor to respond and send a signal to the controller. Because of the
uncontrolled room conditions, do not expect the controller to display an oxygen concentration equal to that
specified on the tank data sheet.
Checking and Replacing Fuses
The fuses used to protect the transmitter circuitry are time-lag TR5 elements. They are UL rated at 250
VAC, and manufactured by Wickmann, series 374.
There are two fuses labeled FI and F2 on the P.C. board. These fuses have a rating of 0.200 Amps.
Access the fuses by removing the cover securing screws and lifting off the housing cover. Test these fuses
by removing them from their holders after disconnecting all power sources. Measure for a low value of
resistance across the pins. Replace any fuse that does not have a resistance reading near 0 ohms. Always
replace fuses with one having the same ratings and characteristics.
Replacing the Sensor
The sensor’s useful lifetime depends greatly upon its operating conditions. Continuous operation around
large or numerous gas sources may shorten the sensor’s useful life. The recommended replacement date
is two years after the manufacturing date listed on the front panel label.
Because each sensor requires individual calibration, the sensor is replaced by installing a new, calibrated
sensor board assembly purchased through your Brasch distributor.
This procedure can be
accomplished in the field. The old sensor board assembly can be discarded.
Please refer to the assembly drawing on page 4 of this manual while removing and
installing the sensor board assembly.
To replace the sensor board assembly, remove all transmitter power sources and remove the front cover
from the transmitter. Carefully lay the cover assembly on its front to expose the sensor P.C. board.
Disconnect the wires from terminal strip TS1, and remove the four securing screws from the sensor board.
After making sure that the sensor is firmly seated on the replacement sensor board, place the board in
position with the sensor toward the inside of the front cover. Secure the board with the four mounting
screws. Connect the wiring to terminal TS1 being very careful to place the wires back o n the correct
terminals. Secure the wires by firmly tightening the terminal screws.
Place the cover on the transmitter housing and secure with the four cover screws. Restore the transmitter
power source and check for proper operation. See “Testing the Response to the Target Gas” on page 8.
Suggested Repair Parts
The Brasch Gas Transmitter contains few field serviceable parts. However, the fuses are replaceable in the
field. While an open fuse may indicate problems with the P.C. board circuitry, fuses may also open because
of power surges on the AC line. Therefore, Brasch Manufacturing Company recommends that the following
fuses be available for replacement.
Qty.
5 ea.
Description
Part Number
Fuse, TR5, time-lag, 0.200 Amp, 250 VAC.
TR5-0.200
A package containing the proper quantity of fuses can be purchased through your Brasch distributor.
9
PART FOUR – COMMON INSTALLATION/OPERATION MISTAKES
Transmitter Gas Type Set Wrong
The sensor contained inside the transmitter housing is designed to respond to a specific type of gas. A two
position header, TP2, on the sensor P.C. board is configured so that the controller will know the type of gas
the transmitter is programmed to detect. Whenever the controller asks the transmitter for its latest sensor
reading, the transmitter also sends information about the type of sensor it contains. The controller uses both
the type information and the sensor reading to properly scale the sensor response before displaying the
concentration.
Fig. 5, in the appendix, shows the location of TP2 and also indicates where jumpers should be placed so
that the transmitter sends the controller the proper type of gas information. The header has two positions
marked “A” and “B”. An “X” in a position indicates that the position should have a jumper placed across its
two pins.
Transmitter I.D. Set Wrong
The transmitter is designed to operate in a system of up to 2 transmitters. In this case, each transmitter is
assigned a unique number called its I.D. The controller uses this I.D. number to address the transmitter and
distinguish the transmitter from the other transmitter in the system. The I.D. of the transmitter is determined
by the jumper configuration of TP1 on the sensor board. The appropriate jumper configurations are shown
in Fig. 5 in the appendix. As an example, transmitter #1 would have an I.D. of “1” and jumpers would be
placed on positions 2, 4, 8 and 16. Transmitter 2 would have an I.D. of “2” and jumpers would be placed on
positions 1, 4, 8 and 16. The two transmitters can not share the same I.D. number in a system.
The communication protocol between the controller and the transmitters works as a “master/slave”
configuration. The controller sends all transmitters the same I.D. number, but only one transmitter
recognizes the command. The selected transmitter then becomes the “master” and sends the sensor type
and reading to the controller which is now the “slave”. If two transmitters are identified by the same I.D.
number, a collision could occur on the serial data line that could destroy the transmitters’
microprocessors.
When the transmitter is operated as part of a Brasch GDCP-0, 1, 2, or 3 panel system, each transmitter is
not uniquely identified. In this case, all transmitters will have jumpers positioned on all of the header pins
shown in Fig. 5.
If you are unsure of the proper I.D. configurations, do not operate the system. Instead, call your Brasch
representative and discuss your questions with a Brasch technician before placing the system into
operation.
Transmitter Mounted In an Unsatisfactory Location
For reliable operation, the transmitter(s) must be mounted in the proper location(s). Please read “Mounting
the Transmitter” on page 1 for guidelines on choosing locations. By following the mounting guidelines, much
of the problems caused by improper mounting locations can be eliminated.
Common mistakes include mounting a transmitter too close to a garage door. When the door is open, rain
may blow through the doorway and onto the transmitter housing. Another common mistake is to mount the
transmitter in a location where it comes in direct contact with engine exhaust. The large amount of
contaminates in engine exhaust can shorten the useful life of the sensor.
One more common mistake is to choose a mounting location that places the transmitter too near the outlet
of air conditioners or heaters. Quick, drastic changes in ambient temperature can cause erratic shifts in the
transmitter response.
10
PART FIVE – LIMITED WARRANTY
Warranty Statement
Limited Warranty
Brasch Manufacturing Co., Inc warrants gas transmitters, gas detectors, gas detector control
panels and accessories for a period of one year from the date of shipment against defects in
material or workmanship. Should any evidence of defects in material or workmanship occur
during the warranty period, Brasch Manufacturing Co., Inc. will repair or replace the affected
product, at its own discretion, without charge. The company shall not be held responsible
for any charges incurred with removal or replacement of allegedly defective equipment, nor
for incidental or consequential damages.
Service and Repair Procedures
Our goal at Brasch Manufacturing is to produce products that constantly exceeds the requirements and
expectations of our customers. One of the ways of meeting that goal is to produce products that never fail
or require service. However, when we are advised of a problem with one of our products, it is our intention
to address the problem as quickly and efficiently as possible.
Many problems that appear at first to be associated with the product can be solved without returning the
product. If you experience a problem, and would like to discuss it with a factory service technician, you may
call the number listed on the product label. You will be transferred to a technician specially trained to
service that specific product. This technician will help you determine the most efficient way of solving the
problem.
If service or repair of your Brasch product becomes necessary, an authorization request for returning the
product to the Brasch factory must be obtained from our sales office. If you are an end user, please contact
your Brasch distributor to initiate this request. The distributor, after obtaining a description of the problem,
will contact the factory and request a Return Goods Tag, (RGT), number. This number must be placed in a
conspicuous location on the outside of the shipping package. Without this RGT number, Brasch will not
accept the shipment. A brief description of the reason for returning the product should be included in the
package. Without this description, repair may take longer than necessary.
You may at the time you request service, request an estimate on the time it will take for repair. The Brasch
representative will give you an estimate based upon the information you provide. Although Brasch
Manufacturing Company will repair and return your product in as short a time as possible, Brasch can not be
held responsible for meeting repair estimates.
11
PART SIX – APPENDIX
Model Numbers and Descriptions
Each Brasch Gas Transmitter is given a model number that describes the type of target gas it is designed to
monitor. This model number appears on the front panel label below the sensing port along with the name of
the transmitter.
Use the following list to completely identify a transmitter once you know the model number.
Transmitter Model Number and Description
GSE = Gas Sensor, Electrochemical
Model Description
Model Number
Carbon Monoxide Transmitter:
GSE-CM-TRNS
Nitrogen Dioxide Transmitter:
GSE-ND-TRNS
Oxygen Transmitter:
GSE-OX-TRNS
“Type of Gas” (TP2) Jumper Positions:
TYPE
“Transmitter I.D.” (TP1) Jumper Position
Jumpers on Position:
A
B
I.D.
Jumpers on Position:
2
4
8
16
1
1
CO
X
NO2
X
2
O2
X
X
X
X
X
X
X
X
X
X
Fig. 5: Transmitter Gas Type and I.D. Settings.
12
Fig. 6: Transmitter Mounting Method Using Four Inch Conduit Box
13
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