RKI Instruments 65-2461RK - Manual (Page 12)

8 • 65-2461RK PPM Hexane Transmitter
4. Plug the voltmeter leads into the test points on the amplifier. Plug the positive lead
into the red + test point; plug the negative lead into the black - test point.
5. Verify a voltmeter reading of 100 mV (±2 mV).
6. If necessary, use a small flat-blade screwdriver to adjust the zero pot until the
voltmeter reading is 100 mV (±2 mV).
7. Remove the voltmeter leads from the test points.
8. Secure the junction box cover to the junction box.
Maintenance
This section describes maintenance procedures. It includes preventive maintenance,
troubleshooting, and component replacement procedures.
Preventive Maintenance
This section describes a preventive maintenance schedule to ensure the optimum
performance of the ppm hexane transmitter. It includes daily, monthly, and quarterly
procedures.
Daily
Verify a display reading of 0 ppm at the controller. Investigate significant changes in the
display reading.
Monthly
This procedure describes a test to verify that the ppm hexane transmitter responds
properly to the target gas.
WARNING: The controller is not an active gas monitoring device during the response
test procedure.
NOTE: Performing a response test on the ppm hexane transmitter may cause alarms. Be
sure to put the controller into its calibration mode or disable external alarms
before performing this test.
NOTE: The following procedure assumes the use of a calibration kit which includes a
calibration gas cylinder, a 0.5 LPM fixed flow regulator with an on/off knob, a
calibration cup for the detector, and a humidifier tube to connect the regulator to
the calibration cup.
Preparing for the response test
1. Place the controller into its calibration mode 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 reading of the transmitter as described
in “Start Up” on page 7, then continue this procedure.
3. Screw the calibration cup onto the bottom of the detector.
4. Use the humidifier tube to connect the regulator to the calibration cup.
5. Set a voltmeter to measure in the millivolt (mV) range.