MBA Instruments MLA 900, Operating Instructions Manual

Page: 19 / 40

Handling
MLA 900 Operating Instructions V 2.0 8011381 © MBA Instruments GmbH 19
4.2
Fault/limit value displays
BAT
(shown on both displays)
Meaning Measures/instructions
The life of the built-in battery is almost over.
The battery voltage is lower than 8 V
(new battery: 9 V).
b
Replace the battery (
→
S. 29, §5.2 ).
▲
~
Meaning Measures/instructions
The measuring probe is outside the liquid.
b
Immerse the measuring probe in the
liquid.
The conductivity of the sample solution is
lower than
50
pS/m.
b
Observe the safety rules and carry out
the measures laid down for this case.
▲
~
1
xxx + constantly changing temperature measuring valuet
Meaning Measures/instructions
The probe cable is broken.
b
Carry out a performance test (
→
S. 21,
§4.3 ).
b
If unsuccessful: change the probe
cable. Then carry out another
performance test.
Measuring probe is badly contaminated or
moist (splashed with water).
b
Clean and dry the measuring probe
(
→
S. 27, §5.1 ).
WARNUNG: Risk by damaged cable
b
Do not operate the instrument in hazardous locations if the probe cable is
damaged or defective.
b
Only change the probe cable outside hazardous locations.
1
Meaning Measures/instructions
Measuring value is greater than
1999 pS/m.
b
Check whether the conductivity of the
liquid can actually be greater than
1999 pS/m.
Measuring probe is badly contaminated or
moist (splashed with water).
b
Clean and dry the measuring probe
(
→
S. 27, §5.1 ).
MLA 900 is damaged.
b
Carry out a performance test (
→
S. 21,
§4.3 ).