RKI Instruments 65-2451RK User Manual
Page 18
14 • 65-2451RK Hydrogen Transmitter
5.
Unscrew the regulator from the zero air calibration cylinder. Leave the sample tubing
connected to the regulator and the calibration cup.
Setting the Response Reading
1.
Screw the regulator into the calibration cylinder. Verify that the calibration gas is
representative of the transmitter’s target gas.
2.
Turn the regulator knob counterclockwise to open the regulator.
3.
Allow the calibration gas to flow for one minute and verify that the reading matches
the response reading (±2 mV) you determined earlier. If necessary, use the span pot on
the amplifier to adjust the reading to match the correct response reading.
4.
Turn the regulator knob clockwise to close the regulator.
5.
Unscrew the regulator from the calibration cylinder.
Returning to Normal Operation
1.
Remove the voltmeter leads from the amplifier test points.
2.
Unscrew the calibration cup from the detector.
NOTE:
For convenience, leave the regulator and calibration cup connected by the
sample tubing.
3.
Secure the junction box cover to the junction box.
4.
When the controller display reading falls below the alarm setpoints, return the
controller to normal operation.
5.
Verify that the controller display reading decreases and stabilizes at 0 %LEL.
6.
Store the components of the calibration kit in a safe and convenient place.