RKI Instruments M2 Rig Monitor - Manual (Page 35)

M2 Rig Monitor Operator’s Manual 30
8. Press and release the ENTER button. The Rig Monitor will perform a fresh air
adjustment and the display will indicate SPAN w/Cal Gas?.
9. If you applied zero air to the detector, unscrew the regulator from the zero air
calibration cylinder.
10. If you applied zero air to the detector, leave the sample tubing connected to the
regulator and the calibration cup/splash guard.
If you did not apply zero air to the detector, use the calibration kit sample tubing to
connect the fixed flow regulator to the calibration cup/splash guard.
NOTE: If the fresh air adjustment fails, see “Troubleshooting” on page 26 for
recommended actions.
Adjusting the Span Setting
1. If you want to continue with adjusting the span setting, press and release the UP/YES
button. APPLY will alternate with SPAN Gas on the top display line and the current
gas reading will be on the bottom display line.
If you want to skip adjusting the span reading, press and release the DOWN/NO
button. The display will indicate Leaving Cal Mode and the M2 Rig Monitor will
return to normal operation.
2. Screw the calibration gas cylinder onto the fixed flow regulator.
3. Turn the regulator knob counterclockwise to open the regulator.
4. Allow calibration gas to flow for two minutes.
5. Turn the regulator knob clockwise to close it. The Rig Monitor will continue to display
the maximum gas response on the display and retain the response level in its memory.
6. Unscrew the calibration gas cylinder from the fixed flow regulator and disconnect the
sample tubing from the calibration cup/splash guard hose barb.
7. Adjust the gas reading up or down to match the calibration gas cylinder concentration
by using the UP/YES and DOWN/NO buttons, then press and release the ENTER
button.
8. The Rig Monitor will perform a span operation. The display will indicate SPAN Gas
PASS
for a few seconds, then indicate SPAN Gas SAVED before indicating Leaving
CAL Mode for a few seconds.
NOTE: If the span adjustment fails, see “Troubleshooting” on page 26 for
recommended actions.
9. The display will now alternate between the normal operation screen and the message
REMOVE CAL GAS
for 1 minute. If the calibration gas has not been removed from
the detector, remove it now to avoid unwanted alarms.
During this 1 minute period, the signal output will remain fixed at 3.5 mA and the
relays will remain in their non-alarm state to avoid unwanted alarms while the
calibration gas clears from the detector. At the end of the 1 minute period, the
REMOVE CAL GAS
message will stop appearing and the Rig Monitor will return to
normal operation.
10. Store the components of the calibration kit in a safe place.