JDC Electronic SA Geos 11 - Manual (Page 36)

2. While the instrument is on, press simultaneously on the
3 buttons and then release: the following indications
will appear:
(the instrument is in the automatic
stop mode), 127 (the software version) and the segments
that are lit up (1 segment = 0.025V, no segment: <2.3V,
all the segments lit up: >3.1V).
This information is only valid for the battery supplying the
instrument. As for the Light Emitting Diode lamp, a significant
decrease in the brightness of the light will indicate that you need
to replace the batteries.
Battery lifetime
In the storage state : > 12 ye rs a
Turned off (OFF state) : 6 years
Permanent operation : 6 weeks
Constant operation + history with a
rate of 1 recording per second)
: 3 weeks
A lifetime of at least 1 year when in standard use. A practical
example: instrument turned on once a day for 30 minutes + history with a
rate of 1 recording every 20 seconds.
LCD Display Test
This test is used to check if all the LCD segments are
operating. With the instrument switched off, press down
simultaneously the 3 buttons for 2 seconds; all the
segments light up (as shown opposite). To stop the
instrument, keep
down.
Temperature Compensated Quartz
The instrument uses a temperature compensated quartz clock. Should
you notice a drift however, you have the possibility of correcting this
deviation by -6.35 to +6.35 seconds per day. Go to the special menu and
display the chronometer screen, then keep the
button down, starts
flashing on the upper block. Release the button when you have accessed
the calibration. Use the
button to select the direction of the adjustment
( increment, decrement), then set the value using the button.
Keep the button down to confirm your setting, release it, and then
press it down again to exit the special menu.
36