MSA PrimaX - Page 22

Calibration Procedure
The calibration can be performed as a manual or an automatic calibration [→M-04].
Automatic Calibration [automatic]: a countdown is displayed. After the countdown the value is measured
and displayed. When the value is stable the current value is selected automatically.
Manual Calibration [manual]: the measuring value is displayed. When the value is stable press ENTER to
select the current value. The recommended test gas application time for calibration is: t
Test gas
=5*t
90Gas
,
depending on the test gas, see 6.4 PrimaX Response time.
Waiting for calibration gas
After starting any calibration step, calibration gas [zero or test gas] must be applied until calibration step is
finished.
The calibration state is indicated by the output signal current and has to be monitored in case
of manual calibration (→ chapter 7.3 ).
Calibration Steps
The calibration procedure can be canceled at any time by pressing ESC. The previous
transmitter calibration will be used.
(M-01] - ZERO and SPAN Gas Calibration
1. Press ENTER and select menu 1.
2. Press ENTER button.
3. Enter password (→chapter4.5 Password).
4. Apply zero gas (synthetic air).
5. Wait until countdown is finished (automatic) or press ENTER(manual).
OK is displayed.
6. Apply test gas.
7. Wait until calibration is finished (automatic) or press ENTER(manual).
OK is displayed.
Idle time countdown starts, during this time the test gas can be removed and the output signal
remains on service current level.
8. Remove test gas during the countdown.
[M-01] - Oxygen Calibration
1. Press ENTER and select menu 1.
2. Press ENTER button.
3. Enter password (→chapter4.5 Password).
4. Apply synthetic air.
5. Wait until countdown is finished (automatic) or press ENTER(manual).
OK is displayed.
6. The device goes to measuring mode.
[M-02] - ZERO Gas Calibration
7. Press ENTER and select menu 2.
GB PrimaX 22
4 Operation