Hach-Lange SI628 C - Manual (Page 26)

22
6. Error messages
During calibration
Error C
> 30 %
Unstable reading
more than 1 min.
SAME STANDARD
UNKOWN
STANDARD
Deviation of the cell constant
value higher than 30 % of its
nominal value.
Unstable reading for more
than 60 s.
1st and 2nd buffer have the
same nominal value.
Incorrect buffer solution.
Cell “worn out”.
Error in the selection of the cell.
Verify programming.
Defective or dirty cell.
Standard from the refrigerator.
Same standard was used for both calibration
points.
Press ESC to quit calibration.
The standard used is not among the 3 in memory:
147 µS/cm, 1413 µS/cm or 12.88 mS/cm. at
25 °C. Press ESC to quit calibration.
°C OUT OF RANGE
Standards temperature. Standard temperature > 35 °C or < 10 °C.
On display Problem Possible causes
Other messages
OUT OF R. 22.3°C
- - - - -- mS/cm @25°
°C OUT OF RANGE
13.37 mS/cm @25°
LIMIT 22.3 °C
835 µS/cm @25°
ALARM 22.3°C
835 µS/cm @25°C
Measured value out of
range.
Measured temperature value
out of limits.
Measured value out of the
programmed limits
L1 and/or L2.
Activation of the alarm relay
Conductivity reading > 200 mS/cm.
After 1 minute, the current output will remain fixed
at 22 mA.
Pt 1000 probe broken or temp. < –20 or >150°C.
After 1 minute the current output will remain fixed
at 22 mA.
Verify the programmed limit values.
Verify process evolution.
The conductivity value is off limits for longer than
the programmed delay of alarm relay activation.
The current output will be set at 22 mA, but the
limit will continue to relay on.
On display Problem Possible causes
si628 C_HACH LANGE_Ed. 0510.indd ANG:22 si628 C_HACH LANGE_Ed. 0510.indd ANG:22 20/5/10 11:08:48 20/5/10 11:08:48