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TROUBLE SHOOTING
Try this procedure if you suspect the electronic performance of the
instrument.
1.
Short-circuit all pH/mV inputs. Leave all other inputs open.
2.
Switch the instrument ON.
3.
Select the mV ranges by pressing MODE. The display should show
[0MV] ± 1 mV. Run the Calibrate procedure if erroneous values are
read.
4.
Connect a fresh standard alkaline battery of 1.5 V to pH/mV input.
5.
The display should now read approximately [1500 MV]. Run the
Reset procedure if erroneous values are read.
6.
Reverse the battery of 1.5 V and connect it to pH/mV input.
7.
The display should now read approximately [-1500 MV]. Run the
Reset procedure if erroneous values are read.
This procedure permits to calibrate automatically all amplifiers of the
instrument.
1.
Short-circuit all pH/mV inputs. Leave all other inputs open.
2.
Switch the instrument ON while holding CAL pressed.
3.
The display shows [SELFCAL] for a while and returns to the
measurements.
This procedure resets the instrument to the original factory settings. All
personal memorised data (including access code) will be erased!
1.
Switch the instrument ON while holding MODE pressed.
2.
The display shows [rESEt] for a while and returns to the measure-
ments.
Simple test
Calibrate
Reset
6
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