RKI Instruments M2 Rig Monitor - Manual (Page 21)

M2 Rig Monitor Operator’s Manual 16
actuate. Touching the glass and removing the wand is the same as pressing and releasing a
button. Touching the glass and keeping the wand in place is the same as pressing and
holding a button.
WARNING: The M2 Rig Monitor is not an active gas monitoring device during the
fresh air adjustment procedure. The 4-20 mA output signal will “freeze” at
3.5 mA and all relays will remain in their non-alarm state while the M2
Rig Monitor is in Calibration Mode. The output signal will not indicate
current readings and the relays will not resume operating normally until
the M2 Rig Monitor is in normal operation again.
NOTE: While in the calibration program, if there is no switch activity for the
calibration time-out period the unit will return to normal operation. The factory
set time-out is 15 minutes. If you want a different time-out period, see
“Viewing & Changing M2 Rig Monitor Parameters” on page 22 for instructions
to change the calibration time-out.
Adjusting the Fresh Air Reading
1. While in normal operation, press and hold the UP/YES button for 5 seconds to enter
Calibration Mode. Release the button when the following screen appears.
2. Press and release the UP/YES button to continue. The display will indicate the target
gas and CAL Mode for a few seconds before showing FreshAir Adjust?.
3. Press and release the UP/YES button. ENTER will alternate with FreshAir on the top
display line and the current gas reading will be on the bottom display line.
4. Press and release the ENTER button. The M2 Rig Monitor will perform a zero
operation and the display will indicate SPAN w/Cal Gas?.
5. Press and release the DOWN/NO button. The display will indicate Leaving CAL
Mode
and the M2 Rig Monitor will return to normal operation.
Calib?
YES/NO