ENMET SPECTRUM-RAL-DC - Manual (Page 10)

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2.1.5 Data
The SPECTRUM-DC-RAL monitor retains the maximum and minimum gas concentration values
encountered since turn- on, or since the data was cleared and reset. There is a one minute delay from
the time the instrument is turned on until when it starts storing the information. To access this press the
OPTION switch three times; "see DATA" is displayed. Press the SELECT switch; the maximum
concentration since turn-on or last reset is displayed. Press the OPTION switch again; the minimum
concentration since turn-on or last reset is displayed. Press the OPTION switch again; "clr DATA" is
displayed. Pushing the SELECT switch clears the data and resets it to the current concentration.
Pushing the OPTION switch once more results in a display of both the countdown to the confidence
beep and the internal temperature of the instrument in degrees centigrade. Push the OPTION switch
three more times to return to the operational display.
2.1.6 Backlight
To backlight the display for observation in a dark area, press and quickly release the POWER /
BACKLIGHT pushbutton. The LCD backlight comes ON for a period of 45 seconds and then turns
OFF automatically. The backlight can be turned off sooner than 45 seconds by pressing the POWER /
BACKLIGHT pushbutton a second time. Use the backlight feature sparingly; it is a relatively high
energy user, and extensive use rapidly depletes the battery.
2.1.7 Low Battery Alarm
The battery status display is accessed by pressing the OPTION pushbutton once. When this display is
"Batt=OK", the battery energy level is sufficient for operation of the instrument. In this condition, the
confidence beep occurs every thirty seconds when the instrument is not in alarm.
When the battery energy level drops below the critically low point, the instrument automatically shuts
off, and cannot be used until the battery is replaced. See paragraph 3.2.2 for batter removal and
replacemamt.