RKI Instruments 65-2640RK-04 - Manual (Page 22)

17 65-2640RK-04 M2A Transmitter Operator’s Manual
WARNING: The M2A 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 M2A is in
Calibration Mode. The output signal will not indicate current readings
and the relays will not resume operating normally until the M2A 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 M2A Parameters” on page 23 for instructions to change
the calibration time-out.
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 M2A 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 M2A will return to normal operation.
Calib?
YES/NO