ENMET MX-2100 - Manual (Page 9)

MX2100 ENMET Corporation
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3.1.2 Selection of Combustible Gas Display During Power-Up
1. Hold down the Audio or Backlight Switch.
2. Switch on the instrument by pressing the Enter Switch.
3. Release the Audio/Backlight Switch.
The display shows the ENMET logo for a few seconds while it performs its self-tests.
It then displays the list of preprogrammed gases, with the currently selected gas in the dark field.
4. Choosing a new reference gas:
• Each time you press the Audio switch, the list scrolls downwards and, each time you press the Backlight switch, the list
scrolls upwards. Thirty-one reference gases are preprogrammed in the range 0-100% LEL (or 0-5% volume CH4). A
thirty-second (32) "Other" lets you select a gas according to your specific requirements. The data specific to that gas are
entered in the workshop.
• Confirm the choice: when the chosen gas is displayed, press the ENTER switch. The instrument advances to "Testing"
mode, as described in the previous section, before going on to the working phase.
The instrument is ready to use.
If you do not confirm any gas, after a certain time, the MX-2100 switches to the test phase and to the normal
scanning phase without changing the reference gas.
• If the tests are unsatisfactory, the instrument switches to alarm mode (rapid pulsating audio signal and flashing light).
N OTE : The chosen “reference gas” will be retained as the chosen gas until a different reference gas is chosen.
3.2 Turning Off MX-2100
The instrument is turned off by holding down the ENTER switch for 3 seconds.
During this time, the countdown Stop, 3, 2, 1 is shown on the display, at the bottom, while the instrument is shutting down.
When the instrument is turned off, the stored values (sensor adjustment data, alarm thresholds, histogram, etc.) are not lost.
The theoretical storage time for these values is two years (provided that the main batteries are never discharged).
When the instrument is returned to the workshop, it is useful to recharge the batteries or to print out the exposure histograms.
3.3 Display Backlight
Measurements can be read in dark places by pressing the Backlight switch.
The display is then lit up in so the data can be read easily. This backlight is automatically deactivated after 30 seconds.
The lighting function can be used in hazardous locations, i.e. containing explosive gases, as the MX-2100 is intrinsic safe.
The display backlight is automatically activated in case of alarm or fault.