RKI Instruments Gas Tracer - Manual (Page 84)

76 • Calibration Mode Gas Tracer Operator’s Manual
• To return to the BUMP screen in Calibration Mode, press
POWER ENTER at any time. If any channel failed the
calibration, the buzzer will sound a double pulsing tone until
you press and release the POWER ENTER button.
• Disconnect the tubing from the probe.
12.Unscrew the demand flow regulator from the calibration cylinder.
13.With the BUMP menu option displayed, press the (SHIFT)▼
button until the NORMAL menu option is displayed.
14.Press and release the POWER ENTER button to return to
Measuring Mode.
Calibrating and Bump Testing the PPM Combustible
Sensor
The PPM sensor in the Gas Tracer needs to be calibrated and bump
tested separately. It cannot be calibrated using the AUTO CAL or
ONE CAL
menu items in the main menu or bump tested using the
BUMP menu item in the main menu. The PPM CAL menu item must
be used. In addition, a 6 inch humidifier tube must be used to connect
the zero air cylinder (if used for a WET fresh air adjustment) and the
ppm calibration cylinder to the instrument.
From Measuring Mode, enter Calibration Mode by pressing and
holding the (SHIFT)▼ button, then pressing the DISPLAY(ADJ)
button and releasing both. If the unit prompts you for the password,
enter it by using the AIR▲ and (SHIFT)▼ buttons to select each
49
12.0
5
%LEL
%
ppm
MAINTENANCE
CH
4
O
2
/CAL
CO
MAINTENANCE
BUMP