RKI Instruments Digester Gas Monitor - Manual (Page 68)

62 • Entering Calibration Mode Digester Gas Monitor Operator’s Manual
Entering Calibration Mode
WARNING: The Digester Gas Monitor is not an active gas monitoring device during the
calibration procedure. When you enter Calibration Mode, the 4-20 mA output
signal will “freeze” at 3.5 mA for each active channel, all relays and alarm LEDs
will remain in their current state at the time that you entered Calibration Mode,
and the alarm buzzer and strobe will turn off if they were activated until you exit
Calibration Mode. The 4 - 20 mA output signal will not indicate current readings
and the relays and alarm LEDs will not resume operating normally until the
Digester Gas Monitor is in normal operation again.
1. While in Standby Mode, simultaneously press and hold the ENTER and UP/YES
buttons for approximately 3 seconds to enter Calibration Mode. Release the buttons
when the You Have Entered The CALIBRATION Mode... message displays and
asks if you want to continue in the Calibration Menu.
2. If you want to exit Calibration Mode, press and release the DOWN/NO button. The
Digester Gas Monitor will return to Standby Mode.
If you want to continue in Calibration Mode, press and release the UP/YES button to
continue and display the Select Operation screen. The SET CAL TIMEOUT item will
be displayed.
The next two sections describe how to set the calibration timeout and calibrate the
Digester Gas Monitor’s detectors.
Calibration Timeout Setting
The calibration timeout setting defines the amount of time after the last button push that
the Digester Gas Monitor will remain in Calibration Mode before automatically exiting
Calibration Mode and entering Standby Mode. If the Digester Gas Monitor exits Calibration
Mode because of the automatic timeout, it will begin its warm-up sequence just as it does
when it is turned on.
To view or change the calibration timeout setting, do the following:
1. Navigate to the Select Operation Screen as described in the previous section.
You Have Entered The
CALIBRATION Mode
Continue? [Y / N]
Select Operation
SET CAL TIMEOUT
UP / DN then ENT / ESC