TSI Incorporated Q-TRAK Plus 8552, Руководство по эксплуатации и обслуживанию

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Calibration and Maintenance 39
10. The Q-T
RAK
Plus monitor will indicate the status of the calibration
process. The process will end successfully when "SPAN CAL
COMPLETE" message highlights (Figure 4-9).
-CO2 SPAN CAL: STEP 4-
DETECTING SPAN GAS
AVERAGING SPAN GAS
SPAN CAL COMPLETE
TURN OFF SPAN GAS
BACK
!
DONE
↵
Figure 4–9: CO
2
Span Calibration: Step 4 Screen
11. Turn off the span gas, press the
↵
key to complete CO
2
user calibration,
and remove the calibration collar.
If an error is detected during the zero or span calibration process, an error
message will be displayed. The previous calibration values are kept. Press
the
&
or
↵
key to return to the Calibration Menu.
ERROR DETECTED
OR PROCESS ABORTED
DURING CALIBRATION
VALUES UNCHANGED
Figure 4–10: Error Detected or Process Aborted Screen
Calibrating the CO Sensor
TSI recommends calibrating the Q-T
RAK
Plus monitor's CO measurement
monthly to help ensure accurate readings. The CO concentration
measurement is affected by changes in temperature and atmospheric
pressure. Normal day-to-day variations due to local weather conditions have
little effect. However, changes in altitude can cause more significant errors.
For best accuracy, calibrate the Q-T
RAK
Plus monitor's CO measurement for
your local conditions or if conditions change.
To calibrate the CO sensor, follow the procedure below. You can also follow
the prompts displayed on the screen while in the user calibration mode. You
will need a cylinder of pure air for the zero calibration and a cylinder of gas