RKI Instruments 35-3010RKA-07 - Manual (Page 24)

20 • 35-3010RKA-07 Sample-Draw Detector
2. Connect the calibration kit sample tubing to the regulator.
3. Connect the sample tubing from the regulator to the inlet line at or near the INLET
fitting.
4. Allow the gas to flow for one minute.
5. Verify a voltmeter reading of 100 mV ± 2 mV at the LEL test points as described in the
Preparing for Calibration section above.
6. If necessary, use a small flat-blade screwdriver to adjust the zero pot for the IR CH
4
channel until the voltmeter reading is 100 mV ± 2 mV.
7. Verify a voltmeter reading of 100 mV ± 2 mV at the AMP 2 test points for the H
2
S
channel as described in the Preparing for Calibration section above.
8. If necessary, use a small flat-blade screwdriver to adjust the zero pot for the H
2
S
channel until the voltmeter reading is 100 mV ± 2 mV.
9. Disconnect the sample tubing from the inlet line.
10. Unscrew the regulator from the zero air calibration cylinder. Leave the sample tubing
connected to the regulator.
Setting the Response Reading
1. Screw the regulator into the 4-gas calibration cylinder.
2. Connect the sample tubing from the regulator to the inlet line at or near the sample-
draw detector’s INLET fitting.
3. Allow the calibration gas to flow for one minute.
4. Check the mV output on the LEL transmitter test points and verify that the reading
matches the response reading (±2 mV) you determined earlier.
5. If necessary, use the span pot on the LEL transmitter to adjust the reading to match the
correct response reading.
6. Check the mV output on the AMP 2 test points for H
2
S and verify that the reading
matches the response reading (±2 mV) you determined earlier.
7. If necessary, use the AMP 2 span pot to adjust the reading to match the correct
response reading.
8. Disconnect the sample tubing from the sample-draw detector’s inlet line.
9. Unscrew the regulator from the calibration cylinder.
NOTE: For convenience, leave the regulator connected to the sample tubing.
Returning to Normal Operation
1. Remove the voltmeter leads from the test points.
2. Reconnect the incoming sample line.
3. Wait 1 to 2 minutes to allow the calibration gas to be drawn out and the reading to
stabilize.
4. Close the housing door.
5. Store the components of the calibration kit in a safe and convenient place.