Monroe Electronics Charge Plate - Monitor - model 288B User Manual
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Section 5
MAINTENANCE
Precautions —
User maintenance should normally be limited to keeping the instrument clean and free from
physical damage. Store the instrument in its protective carrying pouch when not in use.
Cleaning —
Fingerprints and other contaminants may be removed from the case with a clean lint-free cloth
dampened in a 70%/30% mix of clean technical grade isopropyl alcohol and de-ionized water.
DO NOT use soap or detergent.
Battery —
Battery voltage is monitored and displayed on the MAIN screen. Normal range of operation is
between 10 and 15 volts. When the battery has discharged to below 10 volts, a warning
message is displayed and the instrument shuts down 15 seconds later terminating any activity
in progress. Battery charge life depends on type of tests being run and the settings selected in
the OPTION menu. Testing may be resumed using AC power.
A complete re-charge cycle takes 4-6 hours with power off.
Charge State Indicator —
While the unit is connected to an AC power line and in an inactive state, the upper half (red) of
the PLATE VOLTAGE bar graph serves as a battery state-of-charge indicator with maximum
being a float condition and minimum implying that the battery requires further charging. The
“x1” and “x2” range lights will be lit. If the power cord becomes disconnected, the LED’s will
continue to report the battery status for several minutes.
Calibration —
Calibration is not a user function and is beyond the scope of this manual. Calibration
information is available from the factory. Monroe Electronics recommends annual calibration
and/or when the instrument is damaged or repaired or where called for more often by contract.
We offer repair and calibration services for a fee.