ENMET SPECTRUM - Manual (Page 10)

ENMET Corporation SPECTRUM Series
6
2.1.6 Battery Status and Low Battery Alarms
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 is low and the battery should be replaced with a new or recharged one, the battery status
display reads "Batt=low", and the instrument beeps once every five seconds to alert the user to the battery condition.
Stop Using The Instrument And Exit An Area That Could Be Hazardous To Safety Or Health. When the battery energy
level is critically low, and battery failure is imminent, the battery status display reads "Batt=LOW", and the instrument
beeps once every two seconds. An alarm condition at this point could cause the instrument to completely shut off.
Replace the battery immediately. The user cannot go past the battery status display until the depleted battery is
replaced with a fresh one.
N OTE : A low battery may cause a “Cell Out” indication. Check or replace the battery if “Cell Out” is displayed.
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.
Two types of batteries are available for use with the SPECTRUM : alkaline and rechargeable Nicad. They have
different end-of-life discharge characteristics. Either replace a battery with the same type, or go to the "set BATT"
portion of the maintenance menu, and select the new type being used.
N OTE : The rechargeable NiCad battery is no longer available.
C AUTION : If the "set batt" selection is not identical with the battery being used, incorrect low battery indications are
furnished.
2.1.7 Data
The SPECTRUM retains the maximum and minimum gas concentration values encountered since turn-on, or since
the data was cleared and reset. To access this press the OPTION pushbutton three times; "see DATA" is displayed.
Press the SELECT pushbutton; the maximum concentration since turn-on or last reset is displayed. Press the
OPTION pushbutton again; the minimum concentration since turn-on or last reset is displayed. Press the OPTION
pushbutton again; "clr DATA" is displayed. Pushing the SELECT pushbutton clears the data and resets it to the
current concentration.
Pushing the OPTION pushbutton 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 pushbutton three more times to return
to the operational display.
2.1.8 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 turnes 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.
2.2 Interference Gases
For each target gas, some gases other than the target gas cause a sensor response, and thus are termed "interference
gases". A compilation of known interference gases for the various target gases is given in Appendix B, along with
gases that are known to not cause a sensor response.