Greystone CMD5B5 Series User manual

Page 1
INTRODUCTION
The CO Transmitter uses an electrochemical
sensor to monitor the carbon monoxide level
and outputs a eld-selectable 4-20 mA or
voltage signal. The voltage signal may also be set
to 0-5 or 0-10 Vdc. The sensing range and output
may be scaled to either 100, 150, 300, 400 or 500
ppm via the on-board menu. A front panel LCD
is standard to ensure easy setup and operation.
Other standard features include a back light
for the LCD, a front panel test switch, status
indication and an alarm buzzer.The test function
may also be controlled remotely with a digital
input signal. A three-key menu is implemented to allow local conguration of all device parameters.
BEFORE INSTALLATION
Read these instructions carefully before installing and commissioning the CO Transmitter. Failure to follow
these instructions may result in product damage. Do not use in an explosive or hazardous environment,
with combustible or ammable gases, as a safety or emergency stop device or in any other application
where failure of the product could result in personal injury. Take electrostatic discharge precautions
during installation and do not exceed the device ratings.
MOUNTING
The CO duct type sensor installs on the outside of a return
air duct with the sampling tube inserted into the duct. Use
the included foam plug to prevent air from entering the
enclosure through the conduit and causing an incorrect
reading. Mount the sensor in an easily accessible location
in a straight section of duct at least ve feet from corners
and other items that may cause disturbances in the air ow.
Avoid areas with vibrations or rapid temperature changes.
The duct CO detector principal of operation is based on the
Venturi eect of the probe that extends into the HVAC duct.
Air owing through the duct is forced into the vent holes on
one side of the probe, into the enclosure, over the CO sensor
and then is drawn back out of the enclosure via the probe
vent holes on the opposite side.
Drill or punch a 1-1/8” or 1-1/4” hole in the duct at the
preferred location and insert the probe into the hole to mark
the enclosure mounting holes. Remove the unit and drill the
four mounting holes. Clean all drilled holes of debris before
mounting the device. Mount the enclosure to the duct with
four sheet metal screws such that the duct air ow is parallel
with the vent holes in the probe (i.e.: air ows directly into
the probe holes). To prevent air leaks, ensure the gasket is
compressed around the probe between the device enclosure
and the air duct.
Open the cover by releasing the latch and connect the device
according to the wiring instructions. After wiring and setup
are complete, close and latch the cover. Secure it with two
self-tapping screws in the holes provided.
HARDWARE SETUP
The only hardware setup required is to select the analog
output type with the PCB switch labeled VOLT and mA. Slide
the switch to the correct position for the required output
signal type, either 4-20 mA or 0-5/10 Vdc.
Figure 1
Figure 3
Figure 2
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Carbon Monoxide Transmitter
CMD5B5 Series - Installation Instructions

Page 2
POWER AND ANALOG OUTPUT WIRING
Use 22 AWG shielded wire for all connections and do not locate the device wires in the same conduit with
wiring used to supply inductive loads such as motors. Disconnect the power supply before making any
connections to prevent electrical shock or equipment damage. Make all connections in accordance with
national and local codes.
The wiring conguration depends on the specic model and the installed options. Follow the example
wiring diagrams to determine the correct wiring. All models have the same terminal functions. This device
has a half-wave type power supply so the power supply common is the same as the output signal common.
Therefore, several devices may be connected to one power supply and the output signals all share the
same signal common. Use caution when grounding the secondary of an AC transformer or when wiring
multiple devices so that the circuit ground point is the same on all devices and the controller.
This is a 3-wire sourcing device. All models require a 24 Vac/dc power supply to operate. Connect the
positive dc voltage or the hot side of the ac voltage to the ANALOG - PWR terminal and the power supply
common to the ANALOG - COM terminal. Note that the Analog COM terminal is NOT connected to the
Relay COM terminals. The device is reverse voltage protected and will not operate if the power supply is
connected backwards.
The linear output signal (either 4-20 mA or 0-5/10 Vdc) is available on the ANALOG - CO terminal. The
signal is referenced to the Analog COM terminal. The 4-20 mA output signal operates in the Active mode
and does not require a loop power supply. This means the signal current is generated by the transmitter
and must not be connected to a powered input or device damage will result. This is the typical operating
mode of a “three-wire device”. Ensure the controller Analog Input (AI) matches the CO Transmitter output
signal type before power is applied. The current signal has a maximum load that it will drive and the
voltage output has a minimum load. Follow the ratings in the Specication section or inaccurate readings
may result. The power must be disconnected to change from VOLT to mA. The analog output CO signal is
typically connected directly to the Building Automation System (BAS) and used as a control parameter or
for logging purposes.
REMOTE TEST WIRING
The COTransmitter has aTest function that will test the analog output and the alarm relays which is initiated
by pressing the front panel TEST switch. The Test function may also be initiated remotely by shorting the
TEST + and TEST - terminals. Note that the TEST - terminal is connected to the Analog COM terminal. The
TEST terminals should only be connected to a dry-contact digital output from the controller that is either
shorted or oating open. Ensure no power is applied to the TEST terminals. The TEST terminals may also be
connected to a remote switch. If desired, only one wire need be connected to the TEST + terminal and use
the power supply COM as the return signal path.
ALARM RELAY WIRING
If equipped, the alarm relay outputs are available on the NO, COM and NC terminals for each relay. The
relay COM terminals are NOT connected to the signal or power supply COM terminal nor to each other. The
two relays are completely isolated and have both Normally Open (NO) and Normally Closed (NC) contacts.
These signals can be used to directly control alarms, ventilation fans or may be connected to digital inputs
of the BAS for status monitoring. Ensure any loads connected to the relays are within the relay ratings in
the Specication section.
Figure 4
Analog Input for
4-20 mA CO Signal
24 Vac Power
Controller
CO
COM
PWR
250R
Com
Hot
Analog Input for
0-5 Vdc CO Signal
24 Vdc Power
Controller
CO
COM
PWR
1M
Com
+
Wiring for 4-20 mA Output Signal
Wiring for 0-5 Vdc Output Signal
RELAY 1
NC
COM
NO
RELAY 2
COMM
LCD
ROLL MENU
POWER
PCB VOLT
mA +
TEST

CO
COM
PWR
A
B+
SHLD
NC
COM
NO
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Page 3
OPERATION - START UP
The device will initially start up in warm-up mode which lasts for about two minutes. Immediately after
applying power the LCD will display the software version number and begin a two minute countdown.
During the warm-up mode the alarm relays will be set to o, the LED will ash red, all communications are
disabled, the key pad is disabled and the analog output will be set to it's minimum value.
OPERATION - NORMAL MODE
In normal operation the sensor will measure the CO level in the duct air and output a proportional value
on the analog output which is scaled to the default range of 0-300 ppm. The CO reading will also be
displayed on the LCD and updated in the communication value. If alarm relays are installed, the present
CO reading is compared to the setpoints and appropriate action is taken if an alarm condition exists. The
status LED on the front cover will be green to indicate normal operation.
OPERATION - ALARM MODE
The CO reading is compared to pre-set setpoints for alarms and if they are exceeded the device enters
Alarm mode. The alarm reset back to Normal mode can be congured via the menu as either Automatic
Reset or Manual Reset.
Automatic Alarm Reset (Default)
Two optional relays are used to indicate alarm conditions. The trip point, hysteresis and delay time of
each relay can be programmed via the menu. For example, Relay 1 defaults to a 50 ppm trip point, 10
ppm hysteresis and 2 minute delay time. Relay 2 defaults to a 150 ppm trip point, 20 ppm hysteresis and
2 minute delay time All of these values can be changed via the menu. In the example for Relay 1, a timer
is started when the CO level exceeds 50 ppm (the trip level). If the level drops below 50 ppm before 2
minutes (the delay time) has expired then the relay is not activated. If the CO level exceeds 50 ppm for
2 minutes then the relay is activated. The relay will remain activated until the CO level drops below 40
ppm (trip level – hysteresis). This relay can be used to signal a “low alarm”. Relay 2 operates in the same
manner and has independently programmable trip point, hysteresis and delay time. This relay can be used
to signal a“high alarm”. The LCD will indicate the Alarm mode details and the LED will ash red.
Manual Alarm Reset
In this case, the alarm relays will activate the same way as described above but will not automatically reset
to Normal Mode when the CO level drops below the trip level - hysteresis value. In order to reset the relay
alarms to Normal Mode the user must also press the TEST switch on the front cover (or activate the remote
TEST input). If the CO level is below the alarm level AND the TEST switch is pressed, then the relay alarms
will return to the Normal Mode.
The Manual Reset also applies to the buzzer alarm. If the buzzer alarm is active, pressing the TEST switch
will "silence" the buzzer. If the buzzer alarm was active but the CO level has been reduced below the trip
point, then the TEST switch must be pressed to reset the buzzer alarm to the Normal Mode.
OPERATION - TEST MODE
The Test mode function is disabled by default, it must be enabled via the menu to operate. To initiate the
Test function during normal operation, either press and hold the TEST switch for 1 second or activate it
remotely by shorting the TEST + to TEST – (COM). This will cause the Status LED to blink red, the analog
output to go to 100% and both relays to activate. The buzzer will also beep once every 15 seconds if
enabled and the LCD will indicate the Test mode and the remaining time.TheTest function will continue for
5 minutes (default) and then the device will reset to normal operation. The Test function can be cancelled
by pressing the TEST switch a second time. Test mode cannot be activated if the device is in Fault, Alarm or
Re-Cal modes of operation, only in Normal mode. The Test function is useful to verify the output and alarm
relay operation and the Test time can be programmed via the menu.
OPERATION - FAULT MODE
The Fault mode function is disabled by default, it must be enabled via the menu to operate. The Fault
function will monitor the CO sensor lifetime and indicate when the CO sensor should be replaced. If the
device determines that the sensor has reached the end of it's useful life and that replacement is necessary
it will enter Fault mode. This will cause the Status LED to blink red and the buzzer to beep once every 10
minutes. The LCD will periodically show "Sensor Fault". The Fault mode can be disabled via the menu or
enabled at any time. If enabled, and the device is in Fault mode, pressing the TEST switch will "silence" the
buzzer due to the Fault alarm only. Buzzer silence due to the Fault alarm will hold until the Fault condition
is reset via the menu. The buzzer may still activate due to a CO setpoint alarm if enabled.
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Page 4
CO Range
0-300ppm
Press the <ROLL> key to scroll through the available options. The CO sensing
range and output scale can be changed to 0-100ppm, 0-150ppm, 0-300ppm,
0-400ppm, or 0-500ppm Press the <SAVE> key to save any change.
<MENU> Press to advance to next menu item
<MENU> Press to enter the User Menu
1. CARBON MONOXIDE RANGE
Buzzer
Enable
Use the <ROLL> key to enable or disable the buzzer alarm. When disabled, the
buzzer will not sound if the buzzer trip point is exceeded. The buzzer will still
beep on startup and will still beep for a fault alarm (if enabled) and ReCal alarm
(if enabled). Press <SAVE> key to save the setting.
<MENU> Press to advance to next menu item
2. BUZZER ALARM
OPERATION - RE-CAL MODE
The Re-Cal mode function is enabled by default, it must be disabled via the menu if it is not required.
The Re-Cal function will monitor the device and indicate when the CO sensor should be re-calibrated.
If the device determines that the sensor requires re-calibration it will enter Re-Cal mode. This will cause
the Status LED to blink red and the buzzer to beep once every 10 minutes. The LCD will periodically show
"ReCal Required". If enabled, and the device is in Re-Cal mode, pressing the TEST switch will "silence" the
buzzer due to the ReCal alarm only. Buzzer silence due to the ReCal alarm will hold until the ReCal condition
is reset via the menu. The buzzer may still activate due to a CO setpoint alarm if enabled.
OPERATION - USER MENU
The device has several parameters that can be congured locally via the User menu using the keypad and
LCD. All parameters default to typical values but the installer may want to change some values. In some
cases, such as the device network address, the installer MUST change the settings before operation. Any
changes made are saved in non-volatile memory and are restored in case of a power loss. Only the menu
items relevant to the device model will be shown. The menu can be accessed at any time after the warm-
up mode and if there is 5 minutes of inactivity the menu will close and normal operation will continue.
Note that the TEST switch has no aect when the User menu is in use.
The menu has several items as shown below. To enter the menu, press and release the <MENU> key. This
will enter the User menu step 1, pressing the <MENU> key a second time advances to step 2. Each press
of the <MENU> key advances the menu item. No values are saved or changed by using the <MENU> key.
The <ROLL> key is used to make changes to program variables by scrolling through the available options.
Holding the <ROLL> key pressed will scroll through some options at a faster rate. When a value is changed,
use the <SAVE> key to save it to memory and advance to the next menu item. The default values are
shown in each step below.
Buzzer
Del 5Min
Use the <ROLL> key to scroll through the available options.
The buzzer delay may be set from 0 to 10 minutes in 1 minute
increments. Press <SAVE> to save the setting. The factory
default is 5 minutes.
<MENU> Press to advance to next menu item
Buzzer
Trip 150
Buzzer
Test OFF
Use the <ROLL> key to scroll through the available options. The
buzzer alarm trip point may be set from 20 to 500 ppm in 10
ppm increments. Press the <SAVE> key to save the setting.
Use the <ROLL> key to toggle the buzzer ON or OFF.
<MENU> Press to advance to next menu item
4. BUZZER DELAY
3. BUZZER TRIP
5. BUZZER TEST
Only if Buzzer enabled
<MENU> Press to advance to next menu item
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Page 5
Relay 1
Trip 50
Use the <ROLL> key to scroll through the available options. The
relay 1 alarm trip point may be set from 20 to 500 ppm in 10
ppm increments. Press <SAVE> to save the setting.
<MENU> Press to advance to next menu item
6. ALARM TRIP
POINT
Relay 1
Hyst 10
Relay 1
Del 2Min
Relay 1
Direct
Relay 1
Test OFF
Use the <ROLL> key to scroll through the available options.
The relay 1 hysteresis may be set from 10 to 100 ppm in 5
ppm increments. Press <SAVE> to save the setting. Note that
the maximum value may be limited by the trip point value.
Use the <ROLL> key to scroll through the available options.
The relay 1 delay may be set from 0 to 10 minutes in 1 minute
increments. Press <SAVE> to save the setting.
Use the <ROLL> key to toggle the available options. Relay 1
operation may be set to Direct or Reverse. Direct operation
means the relay is normally not energized and will energize
on an alarm condition (the NO/NC PCB destinations are
correct). Reverse operation means the relay is normally
energized and ill de-energize on an alarm condition (the NO/
NC PCB designations are reversed). Reverse operation can be
used for "Fail Safe" operation as the relay will change state on
power loss. Press <SAVE> to save the setting.
Use the <ROLL> key to toggle relay 1 ON or OFF.
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
7. HYSTERESIS
8. DELAY
9. DIRECT
10. TEST
Only if Relay 1 installed
<MENU> Press to advance to next menu item
Only if Relay 2 installed
Relay 2
Hyst 20
Relay 2
Del 2Min
Use the <ROLL> key to scroll through the available options.
The relay 2 hysteresis may be set from 10 to 100 ppm in 5 ppm
increments. Press <SAVE> to save the setting. Note that the
maximum value may be limited by the trip point value.
Use the <ROLL> key to scroll through the available options.
The relay 2 delay may be set from 0 to 10 minutes in 1 minute
increments. Press <SAVE> to save the setting.
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
12. HYSTERESIS
13. DELAY
Relay 2
Trip 150
Use the <ROLL> key to scroll through the available options.
The relay 2 alarm trip point may be set from 20 to 500 ppm in
10 ppm increments. Press <SAVE> to save the setting.
<MENU> Press to advance to next menu item
11. ALARM TRIP
POINT
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Page 6
Relay 2
Direct
Relay 2
Test OFF
Use the <ROLL> key to toggle the available options. Relay 2
operation may be set to Direct or Reverse. Direct operation
means the relay is normally not energized and will energize on
an alarm condition (the NO/NC PCB designations are correct).
Reverse operation means the relay is normally energized
and will de-energize on an alarm condition (the NO/NC PCB
designations are reverse). Reverse operation can be used for
"Fail Safe" operation as the relay will change state on power loss.
Press <SAVE> to save the setting.
Use the <ROLL> key to toggle relay 2 ON or OFF.
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
14. DIRECT
15. TEST
TestMode
Disable
Use the <ROLL> key to enable or disable the Test mode. When disabled, the
TEST switch or TEST input will not initiate the test function. When enabled, the
TEST switch will initiate the test function. Note that the test mode will only
function if the device is operating in the Normal mode, the test function cannot
be initiated if any alarm is present. Press <SAVE> to save the setting.
<MENU> Press to advance to next menu item
16. TEST MODE
Only if Test Mode enabled
TestMode
Time 5
Fault Md
Disable
Use the <ROLL> key to scroll through the available options.
The test mode operating time may be set from 1 to 15
minutes in 1 minute increments. Press <SAVE> to save the
setting. This item sets how long the test mode will operate
when the TEST switch is pressed.
Use the <ROLL> key to enable, disable, or reset. When disabled, the device will
not sound the buzzer or provide LCD and status LED indication when the sensor
life is exceeded. When enabled, the fault alarm will activate to indicate the
sensor life is exceeded. Press <SAVE> to save the setting. If it is set to reset and
<SAVE> is pressed, then the fault condition is cleared, the life-time timer is reset
and fault mode is set back to it's default of disable. It may be enabled again.
17. OPERATING
TIME
18. FAULT ALARM
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
Only if Relay 2 installed
ReCal Md
Enable
Use the <ROLL> key to select enable, disable or reset. When disabled, the device
will not sound the buzzer or provide LCD and status LED indication when the
sensor requires re-calibration. When enabled, the ReCal alarm will activate to
indicate the sensor requires re-calibration. Press <SAVE> to save the setting. If
it is set to reset and <SAVE> is pressed, the ReCal condition is cleared, the ReCal
timer is reset and ReCal mode is set back to it's default of enable. This can be
used if the CO sensor is required to be re-calibrated at known intervals.
20. RECAL MODE
<MENU> Press to advance to next menu item
Fault Md
Time 3yr
Use the <ROLL> key to set the fault mode timer to 3, 4, 5 or 6
years. Press <SAVE> to save the setting. If a desired time has
already been exceeded, then it cannot be selected.
19. FAULT MODE
TIMER
Only if Fault Mode enabled
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Page 7
ReCal Md
Time 1yr
Alarm Md
Auto
Use the <ROLL> key to set the ReCal mode timer to 1, 2 or 3 years. Press
<SAVE> to save the setting. This is used to set the CO sensor re-calibration
interval.
Use the <ROLL> key to set the alarm mode to auto or manual. The setting
controls how the relay alarms and the buzzer alarm resets back to normal mode.
For the auto setting, the device will reset the alarms automatically once the CO
level drops below the set alarm thresholds. For the manual setting, the CO level
must be below the alarm thresholds AND the user must press the TEST switch
on the device to reset the alarms. Press <SAVE> to save the setting.
21. RECAL TIMER
22. ALARM MODE
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
Only if ReCal Mode enabled
0 Filter
Enable
Display
CO Value
BackLite
Enable
Out Type
0-5 Vdc
Output
Test OFF
Use the <ROLL> key to enable or disable the zero lter. When enabled, the
device will lter low ppm readings such that 0-5 ppm CO will display and output
0 ppm. When disabled, 0-5 ppm will display and output actual 0-5 ppm. Press
<SAVE> to save the setting. Note that this should be set to disable when doing a
ZERO gas calibration.
Use the <ROLL> key to toggle the setting to either CO Value or Status. When set
to CO value, the actual ppm value of the CO reading will be displayed on the
LCD. When set to Status, the ppm value will not be displayed only the device
operating status. Press <SAVE> to save the setting.
Use the <ROLL> key to enable or disable the LCD backlight. When enabled the
backlight is always on and when disabled it never lights. Press <SAVE> to save
the setting.
Use the <ROLL> key to toggle the voltage output type to either 0-5 Vdc or 0-10
Vdc. Press <SAVE> to save the setting. Note that is item is only shown if the
PCB switch is in the VOLT position. Also note that the output type can only be
changed by disconnecting the power to the unit.
Use the <ROLL> key to scroll through the available options. The output and
display depends on the output type conguration. For 4-20 mA output the
settings are OFF, 4, 8, 12, 16, 20 mA, for 0-5 Vdc output they are OFF, 0, 1, 2, 3, 4,
5, Vdc and for 0-10 Vdc output they are OFF, 2, 4, 6, 8, 10 Vdc. This can be used to
test the output sinal.
23. ZERO FILTER
24. DISPLAY
25. BACKLIGHT
26. OUTPUT TYPE
27. OUTPUT TEST
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
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Page 8
Menu
Exit
Press <SAVE> to exit the menu and return to normal operation or <MENU> to
repeat the menu.
28. EXIT
CALIBRATION
The CO transmitter features a cover mounted
sensor PCB that is pre-calibrated. This means
that the entire sensor PCB can simply be
replaced with a new calibrated PCB if desired
without having to remove the enclosure and
the main processor board. This sensor swap
can be completed in seconds. Simply unplug
the device ribbon cable connection, remove
the old sensor PCB, install the new PCB and
reconnect the ribbon cable. There is no need
to make any adjustments or apply gas to the
transmitter using the sensor swap method. In
this case, the Fault Mode should be reset if it
is enabled.
The device may also be calibrated or veried with the CO gas if required. This requires a eld calibration kit
consisting of a bottle of gas (250 ppm CO in air for example), a tank pressure regulator with ow restrictor
and the necessary tubing with a calibration cap to cover to the sensor. Calibration can be done at 20 to
27°C.
Verication with gas can be done without removing the device cover. Simply apply gas using the calibration
cap attached directly to the port on the cover and monitor the output signal or LCD.
The device cover must be opened to perform an actual calibration. In the case, the gas calibration cap
attached to the sensor xture on the cover as before. The sensor must be continuously powered for at least
1/2 hour prior to calibration. Calibrate the sensor rst in clean air with no CO gas present. Simply adjust the
ZERO pot on the sensor board until 4 mA (or 0 Vdc) output is obtained and the LCD displays 0 ppm. Note
that the "0 Filter" menu item should be disabled to set the 0 ppm. The ZERO and SPAN pots are located on
the edge of the cover sensor PCB and are clearly marked on the PCB.
Then attach the gas supply. Turn the regulator on/o knob fully o and attach it to the 250 ppm gas bottle
and rmly tighten it by hand. Moisten the sponge and squeeze out any excess water. Place the sponge in
the cap so that it will not touch the sensor but does not plug the hole in the side of the cap. Attach the cap
to the xture over the sensor. If the gas cap is too loose on the xtures, simply place a wrap of electrical
tape around the cap the tighten. Slowly turn the valve knob on the regulator to let the gas begin owing.
The regulator will restrict the ow rate to the specied 200 ml/min and the sponge will ensure the gas is
in the right humidity range. Wait for 5 minutes and then adjust the SPAN pot on the sensor board until the
output and LCD reads 250 ppm. Close the valve on the tank and take a cap o from the sensor. Calibration
is complete. In this case, the ReCal Mode should be reset if it is enabled.
DIMENSIONS
Figure 5
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PRINTED IN CANADA
Page 9
SPECIFICATIONS
POWER SUPPLY
Power Supply.......................24 Vdc ±20% or 24 Vac ±10% (non-isolated half-wave rectied)
Consumption.......................100 mA max (with all options on)
Protection Circuitry............Reverse voltage protected, output limited and transient protected
Ouput Signal ........................4-20 mA active, 0-5 or 0-10 Vdc (selectable)
Output Drive Capability...Current: 450  max
Voltage: 10K  min
ENCLOSURE
LCD Display...........................1 ppm resolution, 35mm W x 15mm H, alpha-numeric
(1.4" x 0.6") with backlight
Status LED .............................Two color (red/green) on front panel
Test Switch............................Performs I/O tests, front panel and remote connection
Dimensions...........................127mm W x 101mm H x 65mm D (5" x 4" x 2.55")
Agency Approvals..............Sensor is UL recognized for ANSI/UL-2034 and UL-2075, E240671
BUZZER
Alarm.......................................85db @ 10 cm
Trip Point ...............................Programmable 20 to 500 ppm in 10 ppm increments
Delay .......................................Programmable 0 to 10 minutes in 1 minute increments
OPTIONAL RELAY
Outputs..................................Form C contacts (NO and NC), 5 Amps @ 250 Vac, 5 Amps @ 30 Vdc
Relay 1 Trip Point ................Programmable 20 to 500 ppm in 10 ppm increments
Relay 2 Trip Point ................Programmable 20 to 500 ppm in 10 ppm increments
Relay Hysteresis...................Programmable 10 to 100 ppm in 5 ppm increments
Relay Delay ...........................Programmable 0 to 10 minutes in 1 minute increments
GENERAL
Measurement.......................Electrochemical
Sample Method ..................Diusion
Measurement Range.........0-100, 150, 300, 400 or 500 ppm (selectable)
Accuracy ................................±5 ppm or ±5% of reading (whichever is greater)
0 to 50°C (32 to 122°F), 15 to 90 %RH
Operating Conditions .......-20 to 50°C (-4 to 122°F), 15 to 90 %RH, 0.9 to 1.1 atm
Stability ..................................<5% signal loss/year
Response Time ....................<60 seconds for 90% step change
Enclosure...............................127 mm W x 101 mm H x 65 mm D (5.0" x 4.0" x 2.55")
Duct Probe............................177 mm (7") long x 25.4 mm (1") diameter
Wiring Connections...........Screw terminal block (14 to 22 AWG)
Country of Origin................. Canada
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