Oldham ctx 300 - Page 25

5 – Maintenance
25
■ Adjust the displayed value using the
potentiometer (Figure 24, rep.1).
Example
- CO sensor.
- Scale 0-300 ppm.
- Standard gas concentration: 100
ppm.
- Reading: 533 mV.
■ Shut off the calibration gas injection.
■ Withdraw the gas injection pipe.
■ Then wait and check that the scale
has returned to zero. Otherwise,
repeat the entire procedure.
■ Switch the maintenance on/off switch
to the MES (measure) position
(ref. 1).
Figure 25