RKI Instruments Gas Tracer - Manual (Page 134)

126 • Using Maintenance Mode Gas Tracer Operator’s Manual
If any of the sensors cannot calibrate to the proper value, FAIL
displays along the bottom of the screen and the Gas Tracer lists the
sensor(s) that failed to calibrate. In the example below, the OXY
channel failed calibration. The other sensors calibrated normally.
The buzzer and alarm lights activate. Press and release the RESET
SILENCE button after the buzzer and lights stop to reset the alarm
and return to the calibration menu. Attempt to calibrate again. If
the failure continues, investigate the cause. See “Troubleshooting”
on page 175.
20.Disconnect the tubing from the probe.
21.Unscrew the demand flow regulator from the calibration cylinder.
22.If you have a 5 sensor unit and wish to calibrate the %volume
sensor, go back to step 1 and repeat the process selecting the
%volume calibration value screen in step 16 and using a %volume
methane cylinder.
If you are finished calibrating, use the (SHIFT)▼ button to navigate
to the NORMAL menu item, then press and release the POWER
ENTER button to return to Measuring Mode.
Calibrating Using Single Calibration
If CL EXPRD is set to NOT USE and calibration becomes due, then
the unit must be calibrated using this menu item and/or the previous
menu item, AUTO CAL because it will not be possible to enter normal
operation. See “Calibration/Bump Test Supplies and Equipment” on
page 62 for the items you will need to perform a calibration.
The procedure below describes a span adjustment of one channel
using a calibration kit that includes a 3-gas calibration cylinder, a 0.5
LPM (liters per minute) regulator, and non-absorbent sample tubing.
The standard 3-gas cylinder consists of 50% LEL methane, 12%
oxygen, 50 ppm CO, and a balance of nitrogen. In the example below,
the CH
4
channel’s span is adjusted. See “Parts List” on page 190 for
available calibration kits and calibration kit spare parts.
%
MAINTENANCE
O
2
FAIL