Extech Instruments ExStik DO600, Руководство пользователя

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DO600-en-GB_V7.4 12/16 11
Appendices

Troubleshooting

Guide


Symptom

Possible

Causes

Action

Unit

will

not

power

on
 ‐
Batteries

not

in

place

‐
Dead

batteries

‐
Battery

polarity

incorrect

‐
Replace

Batteries

‐
Replace

Batteries

‐
Reorient/Replace

Batteries

“BAT”

indicator

shown

on

display

‐
Batteries

are

weak
 ‐
Replace

Batteries

Unstable

Readings
 ‐
Insufficient

electrolyte

in

probe

(Air

bubbles

present

when

probe

is

inverted.)

‐
Electrolyte

is

depleted

‐
Replace

electrolyte,

and

membrane

cap

assembly.

Readings

drift

down
 ‐
Insufficient

stirring

(the

probe

consumes

oxygen

at

the

measuring

surface,

requiring

constant

sample

movement

across

membrane)

‐
Move

probe

in

sample

or

stir

sample

Slow

Response
 ‐
Dirty

or

damaged

membrane

‐
Replace

electrolyte

and

membrane

cap

Electrode

cannot

be

calibrated

‐
Depleted

electrolyte

‐
Dirty

or

damaged

membrane

‐
Replace

electrolyte

and

membrane

cap

Electrode

cannot

be

calibrated

after

replacing

the

electrolyte

and

membrane

cap

‐
Dirty

probe

(Cathode

is

not

a

shiny

gold

color)

‐
Clean

cathode

with

Polishing

paper

*

perform

the

electroninc

Zero

calibration

Sample

reading

is

frozen
 ‐
Unit

is

in

“HOLD”

mode

‐
Unit

is

locked

‐
Release

HOLD

(momentarilly

press

Mode/Hold

button)

‐
Remove

batteries,

press

ON/OFF

button,

replace

batteries

and

restart


*

Polishing

paper

is

available

in

the

DO603

membrane

kit




