Monroe Electronics Resistivity Meter - Portable - Surface - model 272A User Manual
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ERROR MESSAGES:
In addition to the flashing battery symbol that indicates the need for battery charging, any of
several other error messages may appear on the screen:
MESSAGES MEANING
ERROR MESSAGE 1:
or ERROR MESSAGE 2:
ERROR MESSAGE 3:
ERROR MESSAGE 4:
MAINTENANCE TIPS:
The case of the Model 272A and the painted surfaces of its probe may be cleaned using a soft
cloth saturated with a solution of warm water and a small amount of mild detergent and wrung
out. Care should be taken not to get detergent solution inside of or on any part of the base of
the probe. The contact electrodes should be cleaned whenever any accumulation of contami-
nants is noted as foreign materials on the faces may cause higher than normal indications.
These parts should be cleaned by spraying or wiping gently with clean technical grade isopropyl
alcohol.
VALUE TOO LOW
VALUE TOO HIGH
Measured value beyond specified
range of instrument, probe
disconnected or incorrect measurement
mode. If VALUE TOO HIGH is not
displayed when probe is lifted in
CONFIDENCE CHECK, check
operating environment
.
CANNOT AUTOZERO
Analog circuit malfunction or
calibration problems.
PROBE SUPPLY LOW
Measuring voltage supply out of
regulation due to overload or
instrument failure.