Rae QRAE PLUS PGM-2000, Operation & Maintenance Manual

Page: 47 / 88

PROGRAMMING
4-9
Press the [Y/+] key to accept the multiple sensor selection
and start the calibration, or press the [N/-] key to modify the
sensor selection and go on to Step 4.
CO H
2
S
LEL OK? - - -
2. Turn on the valve of the mixed gas cylinder to start the flow
of the span gas when the display shows “Apply Mixed Gas.”
When the calibration gas has reached the sensor the
display will show “calibration in progress… 60” with the
countdown timer shows the number of remaining seconds
while the monitor performs calibration. When the countdown
timer reaches 0, the display shows the name of each
sensor, the message “cal’ed!” and the calibrated value for
each gas.
Note: The readings should be very close to the span gas
values.
3. After showing the concentrations of the calibration gases,
the display will show “Span Cal Done! Turn Off Gas.”
Follow the instructions on the LCD and the multiple sensor
calibration is finished.
4. From Step 1, if the [N/-] key is pressed, the display shows
all the sensor names selected for multiple sensor calibration
with the cursor blinking at the first sensor location.
CO* - - - - H
2
S*
LEL* pick OXY
Press the [Y/+] key to select the sensor and the [N/-] key to
de-select the sensor. A previously selected sensor will
show an “*” next to the sensor name. A previously de-
selected sensor will not have an “*”.
Note: The oxygen span calibration is normally done when
fresh air calibration is finished, so the oxygen is not selected
in this multi-gas calibration. Pure nitrogen and single gas