RKI Instruments 65-2301RK - Manual (Page 12)

8 • 65-2300RK/65-2301RK Toxic Detector
calibration gas, sample tubing, and a fixed flow regulator with an on/off knob. See Table 2
on page 12 to determine the correct calibration cup and regulator for the required flowrate
for your detector.
WARNING: Failure to use the recommended calibration cup and calibration gas flow
rate will result in an inaccurate reading.
NOTE: Performing a response test on the toxic detector may cause alarms. Be sure to put
the controller into its calibration program or disable external alarms before
performing this test.
Preparing for the response test
1. Place the controller into its calibration program or disable external alarms.
2. Verify that the controller display reading for the channel you are testing is 0 ppm.
If the display reading is not 0 ppm, set the zero (fresh air) reading of the detector as
described in the Start Up section of this manual, then continue this procedure.
3. Unscrew the splashguard from the housing cap. Make sure the housing cap remains
screwed firmly onto the housing body.
4. Screw the regulator into the calibration cylinder.
5. Use the sample tubing to connect the regulator to the calibration cup. Check the
bottom of the calibration cup to see if it has a specified flow direction through the cup
and if it does, make sure you connect the tube from the regulator to the inlet port. The
81-1138RK calibration cup, which is used for all detectors except for Cl2 and NH3
detectors, has a specified flow direction on the bottom of the cup. The 81-1138RK-CL2
and 81-1138RK-NH3 calibration cups do not have a specified flow direction.
6. Push the calibration cup onto the plug-in sensor that sticks through the housing cap
as far as it will go. The cup seals to the sensor with an O-ring. Make sure to use the
correct calibration cup and sample flowrate for your detector.
Performing the response test
1. Turn the regulator’s on/off knob counterclockwise to open the regulator. Gas will
begin to flow
2. Allow the gas to flow for two minutes, then verify that the reading is within ± 20% of
the cylinder gas concentration.
NOTE: If the reading is not within ± 20% of the correct response reading, calibrate the
detector as described in “Calibration” on page 12.
3. Turn the regulator’s on/off knob clockwise to close the regulator.
4. Unscrew the regulator from the calibration cylinder.
5. Gently pull the calibration cup off of the plug-in sensor.
6. Screw the splashguard firmly back onto the housing cap.
7. When the controller display reading falls below the alarm setpoints, return the
controller to normal operation.
Quarterly
Calibrate the toxic detector as described in “Calibration” on page 12.