EUTECH INSTRUMENTS DO 6 PLUS Instrukcja Obsługi Pobierz pdf (Strona 29)

Instruction Manual COND 6+, TDS 6+, SALT 6+

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7. TROUBLESHOOTING

Problem Cause Solution

No display

Batteries are not installed,

were improperly installed, or

are too weak

Install batteries with correct + / -

polarity. Replace with new

batteries

“LO” displays in

the LCD

Low battery Replace batteries

Unstable

readings

a) Air bubbles in probe

b) Dirty probe

c) Probe not immersed

enough

d) External noise pickup

or induction caused by

nearby electric motor

e) Broken probe

a) Tap probe to remove bubbles

b) Clean probe & recalibrate

c) Make sure sample entirely

covers the probe sensors

d) Move or switch off interfering

motor

e) Replace probe

Slow response Dirty / Oily probe Clean & recondition probe

Inaccurate

readings / can’t

calibrate

Probe guard not installed or

calibration solution incorrect

Install probe guard & replace

calibration solutions

“Er1”

COND 6+

TDS 6+

Attempted calibration value

was not within the ±40%

auto calibration window

Check the value of the conductivity

calibration solution.

Switch to manual calibration mode

and re-calibrate

“Er1”

SALT 6+

Salinity calibration error–

CAL key was pressed in

Under range “Ur” or Over

range “Or” condition

Immerse the probe in a calibration

solution between 1.0 - 50 ppt

“Er2”

Temperature

calibration error

Auto calibration was not

within (0 – 50 °C)

temperature range

Ensure that the temperature is

within the acceptable range

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