Battery Unit
Operation
When a battery unit is installed, the counter can operate
for 3 hours without mains supply. The display starts blink-
ing shortly before the battery is discharged.
The counter charges the battery automatically when con-
nected to the mains, no matter how the Power-switch is
set. Charging a discharged battery to 75 % of full capac-
ity will take 7 hours, and to full capacity, 24 hours.
If the counter is connected to the mains and switched
on, it will not switch to battery operation if you discon-
nect the mains. You must first switch the counter OFF
with the power switch, then ON again before the battery
unit supplies the counter.
Battery Care
The capacity of the rechargeable battery degrades if the
counter is not powered by the battery frequently. To
keep the battery from degrading, cycle the battery, from
fully charged to fully discharged, occasionally.
The capacity of a degraded battery can be restored by
cycling the battery a number of times, but a restored bat-
tery will never reach the capacity of a new one.
If you must store your counter for some time without us-
ing it, store it in a cool and dry place. Leave the counter
with the mains cable connected if possible. If not, don’t
disconnect the mains cable until the battery is fully
charged, then charge the battery for at least 8 hours
every 3 months.
CAUTION: Prolonged storage or use of the counter
at temperatures above +40°C shortens the
life of the battery.
The battery will freeze if it is not sufficiently
charged when stored at a low temperature.
75% charge is sufficient for -40°C.
Error Codes
The counter can display the following error codes if
something goes wrong.
Error OF
Overflow in the counting registers.
Select a shorter Measuring-time if you
get this error code, unless the counter
is set to TOTALIZE, then you must
press reset and start again from zero.
Error 01
RAM memory error
Error 02
Measuring logic error
Error 03
Internal bus error
If the counter shows one of these error codes, try switch-
ing the counter off and on again. If error code 01-03 per-
sists, call Fluke service. Look on the last page in this
manual for Phone No. and address.
Page: 20
PM 6669 - OPERATORS MANUAL