EUTECH INSTRUMENTS ION 700 - REV 3 Manuel d'instructions télécharger pdf (Page 19)

Instruction Manual pH 5+, pH 6+, Ion 6+

5. TROUBLESHOOTING

Problem Cause Solution

No display

Batteries absent or

installed incorrectly

Insert batteries using correct polarity

“LO” Low battery Replace batteries.

“ - - - ” on

display

Ion 6+ requires calibration Perform either 2 or 3 point ion calibration

Unstable

reading

a) Dry electrode

b) Dirty electrode

c) Temperature changing

a) Hydrate / soak pH electrode

b) Clean electrode

c) Allow time for electrodes and solution to stabilize

Not able to

calibrate

a) Display freezes

b) Faulty electrode

c) Inaccurate buffer

a) Release reading by pressing

b) Replace electrode.

c) Use fresh buffer solutions



mV out of range Check the probe/ solution



Buffer value is out of

tolerance

Use new calibration solution & recalibrate. Ensure

correct pH buffer group was selected.



Ion calibration exited after

1 point calibration

Perform at least 2 point ion calibration before

exiting. (Ion 6+)



ISE slope not within the

specified tolerance

Re-calibrate. Check Ion Selective Electrode & refer

to ISE manual (Ion 6+)



Ion calibration points are

not 1 decade apart

Perform calibration with consecutive values. For

example, use 1, 10, & 100 , not 1 & 100 (Ion 6+)



Upon exit of calibration

mode, a 1-point

calibration was attempted

with a pH buffer other

than 7.00 or 6.86.

Repeat pH calibration using one or more points

which include either 7.00 (USA) or 6.86 (NIST)

standards.



Over range: reading

exceeds maximum value



Under range: reading

exceeds minimum value

Ensure that the value being measured is within the

range of the selected mode. Confirm that

electrode(s) are connected and working properly.

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EUTECH INSTRUMENTS ION 700 - REV 3 Manuel d'instructions Page 19

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