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CALIBRATING SENSOR
Step 1: Remove the cover as shown in Figure 1.
Step 2: Remove one of the gas nipple covers on the CO2
sensor and attach tubing from the gas pressure
regulator to the nipple (See Figure 6).
FIGURE 6
Calibration
Step 3: Attach the terminal block accessory to the circuit
board so that the power wires line up with
terminals 1 and 2. Plug in the power supply to
power up the transmitter.
Step 4: Hold housing so that the sensor is in the vertical
plane as shown in Figure 6.
Step 5: Flow zero reference gas at 0.3 SLPM for 5
minutes.
Step 6: Press and hold the Up and Down buttons
simultaneously for 5 seconds to enter the menu
parameters. The display will show the "RON"
parameter.
Step 7: Press the Up or Down button to access the
calibration parameter menu which will display as
"CAL".
Step 8: Press the Enter button. "SET" will then appear
on the display.
Step 9: Press the Down arrow for 3 seconds. All dashes
will appear on the display, then release the
button. Then after 10 seconds "SET" will
disappear.
Step 10: Exit the parameter menu by pressing and holding
the Up and Down buttons simultaneously for 5
seconds or wait 10 seconds.
Step 11: Flow the full scale reference gas at 0.3 SLPM for
5 minutes.
Step 12: Repeat steps 6 through 8.
Step 13: Press the Up arrow for 3 seconds. All dashes will
appear on the display, then release the button.
Then after 10 seconds "SET" will disappear.
Step 14: Exit the parameter menu by pressing and holding
the Up and Down buttons simultaneously for 5
seconds or wait 10 seconds.
Step 15: Disconnect the power supply from the power
source and remove the terminal block from the
circuit board.
Step 16: Remove tubing from sensor and re-attach the gas
nipple cover to the sensor.
Step 17: Re-attach the cover to the back plate.
MAINTENANCE
Upon final installation of the Series CDT, no routine
maintenance is required. The Series CDT are not field
serviceable and should be returned if repair is needed.
Field repair should not be attempted and may void
warranty.
This symbol indicates waste electrical
products should not be disposed of
with household waste. Please recycle
where facilities exist. Check with your
Local Authority or retailer for recycling
advice.
Manual
7960-902
Page
5 of 6
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