WPI EVOM3 - Page 34

30 World Precision Instruments
Issue
Possible Cause Solution
Unit runs ie, and e 
nit i in-
ciently charged
Recharge the unit for at least 12 hours.
NOTE: Make sure the EVOM3 i eed  hen
charging the battery.
Unit does not charge
or charging LED not lit
Insecure con-
nection at power
input jack on
meter
Verify that the power connector is securely connected
at the meter power input jack.
Defective charger The EVOM3 charge socket can be tested with a USB to
Mini-B cable plugged into a computer’s USB port (WPI
#803026). If the charging LED lights up, then a new char-
ger is needed (WPI #803025).
USB drive not
working or not
recognized by
EVOM3
Not all USB thumb
drives work on the
EVOM3.
See "Sample Resistance File (*.CSV)" on page 16 and
page 5.
Meter will not power
on with charger
DISCONNECTED
Batteries are
discharged
The meter powers down automatically when the bat-
teie ae deleted e  the mete and nnet it
to the battery charger. Charge it for at least 12 hours.
 ll hage ma eie  t  h F eliailit,
the meter should be charged each evening (with the
e ) ee e the net da
Batteries are
defective
Contact WPI for service. The EVOM3 battery is not user
servicable.
Voltage reading is unstable
Electrodes are
heavily charged
or dirty
Clean the electrodes. See "Cleaning/Maintaining the
STX2-PLUS Electrodes" on page 26.
Electrode too
close to strong
electromagnetic
radiation device
e the tem t a dieent aea aa m e
 eletmagneti field letmagneti field e
ld inlde mte, R eiment, magneti ti-
rers, etc. Cell phone signals can also interfere.
Power line or USB
connected to a
recording device
causing noise
Remove the USB connection to eliminate the possibility
of a ground loop.