Appendix E: Trouble Shooting
C76IB003EN-E
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Appendix E: Trouble Shooting
Table E.1: Adjustment
Problem
Cause and Correction
See
Readjustment is necessary
very often.
Bad water quality for checks/adjustments: Use
freshly degassed ultra-pure (bi-distilled or
deionized) water.
The measuring cell is not clean: Clean and dry the
measuring cell perfectly before an air check/
adjustment.
The measuring cell is corroded by hydrofluoric acid,
strongly alkaline solutions or mechanical abrasion:
Do not leave glass-corroding liquids in the
measuring cell.
Direct sunlight on the DMA: Install the DMA M at a
place without direct sunlight.
The adjustment is not
finished after 10 minutes.
The measuring cell is not sufficiently dry for the air
adjustment: Clean and dry the measuring cell
perfectly before an air check/adjustment.
There are gas bubbles in the measuring cell during
water adjustment: Repeat the filling procedure and
use freshly degassed ultra-pure (bi-distilled or
deionized) water.
Table E.2: Measurement
Problem
Cause and Correction
See
I cannot start any
measurement 15 minutes or
more after booting the
instrument.
Verify whether one or more modules are using older
firmware versions than expected from the
instrument’s firmware. This information is either
displayed at the start screen or in the diagnosis list
of the quick access area. Tap <Menu> and select
"Service > Update > Module Firmware"
to update
the respective modules using the internal firmware
update package.
Density Condition: "Filling
Warning"
Gas bubbles in the measuring cell: Degas your
sample. Fill the sample at higher temperature than
the measuring temperature.
Density Condition: "Error: No
Oscillation"
The measuring cell is only partly filled: Fill the
sample again.
Density Condition: "Timeout
Error"
The sample is instable (e.g. emulsion):
Prethermostat your sample.
The timeout is set too short: Change the timeout
setting.