Michell Instruments XZR250, Руководство пользователя

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XZR250 User’s Manual
24
97528
Issue 5, May 2019
MAINTENANCE
6.2.1 Calibration gas requirements
Clean dry gas (dew point <-20°C) with an oxygen content between 2% and 21% at a
nominal flow rate of 150ml/min.
1. Remove the plug from the gas inlet port on the sensor head and connect the
calibration gas supply with 4mm tubing via a push fit connection.
!
WARNING: Do NOT leave the port open for extended periods
during operation as ambient air could be drawn into the analyzer
and raise the oxygen readings.
2. Turn the calibration gas ON and set the flow to approximately 150ml/min.
3. Press <ENTER>: the ENTER PASSWORD screen is displayed.
4. Input your current security password: refer to section 4.5 Security Password.
5. Press <ENTER> to access the CALIBRATE menu.
6. Press <ENTER> to access the O
2
level setting.
7. Press <ENTER> to access the Gain menu.
8. The factory default is set to 20.70% O
2
; if calibrating with air then press <RIGHT>
to select the asterisk (*).
9. Press <ENTER> to set.
10. Allow the reading to stabilise before continuing.