35-3010A-12 Sample-Draw Detector • 25
Setting the Response (Span) 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 1 minute.
4.
Check the mV output on the AMP 1 test points for CO and verify that the reading matches the
response reading (±2 mV) you determined earlier.
5.
If necessary, use the AMP 1 span pot 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 readings to stabilize.
4.
Close the housing door.
5.
Store the components of the calibration kit in a safe and convenient place.