RKI Instruments 65-2400RK User Manual
Page 19
65-2400RK Combustible Gas Transmitter • 15
4.
If necessary, use the zero pot on the amplifier to adjust the reading to 100 mV (±2 mV).
5.
Turn the regulator’s on/off knob clockwise to close it.
6.
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 calibrating gas is
representative of the transmitter’s target gas.
2.
Turn the regulator’s on/off knob counterclockwise to open it.
3.
Allow the sample gas to flow for two minutes.
4.
Verify that the reading matches the response reading (±2 mV) you determined earlier.
5.
If necessary, use the span pot on the amplifier to adjust the reading to match the
correct response reading.
6.
Turn the regulator’s on/off knob clockwise to close it.
7.
Unscrew the regulator from the calibration cylinder.
8.
Unscrew the calibration cup from the detector.
NOTE:
For convenience, leave the regulator and calibration cup connected by the
sample tubing.
Returning to Normal Operation
1.
Remove the voltmeter leads from the amplifier test points.
2.
Secure the junction box cover to the junction box.
3.
When the display reading falls below the alarm setpoints, return the controller to
normal operation.
4.
Verify that the controller display reading decreases and stabilizes at 0% LEL.
5.
Store the components of the calibration kit in a safe and convenient place.