PROGRAMMING OF VRAE
4 - 11
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. If no gas has reached the
sensor after 60 seconds, the display will show “ No gas
flow…” and abort the calibration.
Note 1
: The readings should be very close to the span
gas values. After about 30 seconds pause, the display
will show the message “Span Cal Done! Turn Off Gas”
Note 2
: Some sensors, such as ammonia and chlorine
dioxide, require longer equilibration times than 60
seconds. These sensors should be calibrated separately in
a Single Sensor Calibration (Section 4.4.3).
3. This completes the multiple sensor calibration procedure
and moves to the next sub-menu item.
4. Turn off the flow of gas. Disconnect the calibration
adapter from the VRAE Monitor.
5. Press the
[MODE]
key any time during Step 2 to abort
the calibration. If a sensor failed the calibration, the
sensor name and an error message “failed, continue?”
will appear. Press the
[N/-]
or
[MODE]
key to abort the
calibration. Press the
[Y/+]
key to continue the next
sensor calibration. In either case, the calibration data for
the current sensor is not changed.
From Step 1, if
[N/-]
is pressed, the display shows all the
sensor names selected for multiple sensor calibration with
the cursor blinking at the first sensor.
CO* - - - -
H
2
S*
LEL* OK?
O
2
