RKI Instruments 61-0198RK - Manual (Page 11)

61-1007RK/61-0198RK Carbon Dioxide Detector • 7
Start Up
This section describes procedures to start up the CO
2
detector and place the detector into
normal operation.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the power wiring to the controller is correct and secure. Refer to the
controller operator’s manual.
3. Turn on or plug in power to the controller, then turn on the controller.
4. Verify that the controller is on and operating properly. Refer to the controller
operator’s manual.
CAUTION: Allow the detector to warm up for 5 minutes before you continue with the next
section, “Setting the Zero Signal”.
Setting the Zero Signal
Since there is a background of CO
2
in air of typically 300 - 600 ppm (0.03 - 0.06 %volume),
it is necessary to use a calibration kit with a CO
2
free gas to set the zero signal of a low
range CO
2
detector. Fresh air can be used to zero the detector if a 0-50 %volume or 0-100
%volume detector is being used.
The procedure below describes applying 100% nitrogen to the detector using a calibration
kit that includes a calibration cup, a calibration cylinder of 100% nitrogen, sample tubing,
and a 0.5 LPM (liters per minute) fixed flow regulator with an on/off knob.
1. Screw the calibration cup onto the bottom of the CO
2
detector.
2. Screw the regulator into the 100% nitrogen calibration cylinder.
3. Use the sample tubing to connect the regulator to the calibration cup.
4. Turn the regulator’s on/off knob counterclockwise to open it. Gas will begin to flow.
5. Allow the gas to flow for one minute.
6. Verify a reading of 0% CO
2
or 0 ppm CO
2
depending on the detector you are
calibrating at the controller.
If the display reading is 0, the CO
2
detector is in normal operation and start up is
complete. Proceed to step 7 to disassemble the calibration kit.
If the display reading is not 0, turn the regulator’s on/off knob clockwise to close it,
then proceed to “Setting the Zero Reading” on page 12 to set the zero reading.
7. Turn the regulator’s on/off knob clockwise to close it.
8. Unscrew the cylinder from the regulator and remove the sample tubing from the
regulator.
9. Remove the calibration cup from the detector. You may leave the sample tubing
connected to the calibration cup for convenience.
10. Store the components of the calibration kit in a safe and convenient place.