Industrial Scientific Oldham MX52, Commissioning, Operating And Maintenance Manual

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- “Audio and visual” or “audio” clearing of an alarm
- Exit from a current menu
- Start a self- test manually
- VALIDATE
4.1.2. Maintenance keys
PROGRAMMING key (item B, Fig. 26): accessible after opening and swivelling the front panel.
- Combined with the “-” key to go back in a menu.
- To quit normal display mode and access the various menus (see block diagram of
the various menus).
- To scroll through a menu.
CALIBRATION key (item C, Fig. 26): accessible after opening and swivelling the front panel.
- To set a channel to CALIBRATION mode.
- To quit that mode.
4.1.3. Potentiometers
On the FRONT circuit, each measuring channel has four potentiometers (item E in Figures 26 and
27). These are accessible by opening and swivelling the FRONT panel of the MX52 unit and are
laid out as follows (see Fig. 27):
TOP (item A) 1 detector ZERO potentiometer
1 detector sensitivity potentiometer
BOTTOM (item B) 1 potentiometer 4 mA / current output
1 potentiometer 20 mA / current output (for full scale)