RKI Instruments Pioneer 4W - Manual (Page 124)

Pioneer Operator’s Manual CO Transmitter • 21
Calibration
This section describes how to calibrate the CO transmitter. It includes procedures to
prepare for calibration, enter the Calibrate program, set the zero reading, set the response
reading, and return to normal operation.
WARNING: The Pioneer is not an active gas monitoring device during the calibration
procedure.
Preparing for Calibration
1. Screw the calibration cup onto the bottom of the CO detector.
2. Use the sample tubing to connect the regulator to the calibration cup.
NOTE: Do not screw the regulator into the zero air calibration cylinder at this time.
3. Set a voltmeter to measure in the millivolt (mV) range.
4. Remove the junction box cover, then plug the voltmeter leads into the test points on
the amplifier.
Plug the positive lead into the test point labeled TP+; plug the negative lead into the
test point labeled TP-.
5. Use the following formula to determine the correct test points output for the
calibrating sample.
Output (mV) = (calibrating sample/fullscale) X 400 + 100
For example, with a calibrating sample of 50 PPM CO and a fullscale setting of
300 PPM, the correct output is 167 mV.
167 (mV) = (50/300) X 400 +100
Entering the Calibrate Program
1. Open the housing door of the Pioneer, and locate the program buttons to the right of
the display screen.
2. Press the ENTER and UP/YES buttons simultaneously three times.
The Calibrate program screen appears.
NOTE: Once you enter the Calibrate program, the status lights, buzzer, and relays are
disabled until you exit the Calibrate program.
The Pioneer automatically exits the Calibrate program if you do not exit the
program before the calibration time-out setting expires. You can display and
change the calibration time-out setting in the Instrument Setup program
(see Chapter 4, Operation.)
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