8. Troubleshooting
57
DA-650/-645/-640
No.
Error message
Possible cause
Action
6
Calibration failed.
There may be no
difference
between
oscillation frequency of
calibration points 1 and
2.
Clean and dry the cell
before calibration.
Make sure not to allow air
bubbles to enter the cell.
7
Check failed.
Check result may have
exceeded tolerance.
Make sure not to allow air
bubbles to enter the cell.
Widen tolerance.
8
Uncalib method
remains.
Conduct calib.
The error appears when
sample file, temperature
scan or concentration
scan
has
found
temperature that is not
calibrated.
Calibrate
at
required
temperature
before
measurement.
Use one-point calibration
mode, which is useful for
all temperatures.
9
Unable to start temp
scan.
Check temp scan
table.
The error appears if
wrong
concentration
scanning has been set
in.
Review the temperature
scan table as below:
More than 2 points for
linear, more than 3 for
quadratic, more than 4
for cubic equation.
Communication
with
sample changer, when
connected, may have
failed.
Check if communication
cable is properly
connected.
Also check setting of
communication port.
CHD-502 is set in
sequence mode and
keeps turning round
without a single vial on
turntable.
Test vials whether single
or plural must be put on
turntable of CHD-502 if it
is in sequence mode.
10 Changer
communication error.
Check cable.
The alarm appears when
the cable to (sample
changer or any other
option unit) is not
connected
or
configured.
Make sure of cable
connection.
Check
from
your
Density/Specific
Gravity
Meter as follows: “MENU”
-> “Option” -> “Changer”
-> “Model”. Then make
sure if CHD-502, DCU-551
or DCU-600 is selected.
Summary of Contents for DA-640
Page 2: ......
