Hach-Lange SI627 P - Manual (Page 23)

19
6. Error messages
ENGLISH
During calibration
Asymmetry Potential
> 60 mV
Sensitivity
< 85 %
Sensitivity
> 103 %
Buffer solutions at
different temperature
UNKNOWN
BUFFER SOLUTION
Electrode asymmetry
potential > 60 mV.
Electrode slope < 85 % of
theoretical value.
Electrode slope > 103 % of
theoretical value.
Buffers temperature.
Incorrect buffer solution.
Electrode “worn out”.
Buffer solutions contaminated.
Electrode “worn out”.
Buffer solutions contaminated.
Electrode “worn out”.
Buffer solutions contaminated.
The temperature difference between both buffer
solutions used in calibration is > 3 °C.
Press ESC to quit.
SAME BUFFER
SOLUTIONS
1st and 2nd buffer solutions
are the same. Same standard was used for both calibration steps.
Electrode is broken or cable defective.
Press ESC to quit.
Unstable reading
more than 1 min
Unstable reading for more
than 60 seconds. Electrode defective or dirty, see miscellaneous solu-
tions. Variation of buffer solution temperature.
(i.e. when stored previously in the refrigerator).
Same standard was used for both calibration steps.
Electrode is broken or cable defective.
Press ESC to quit.
On display Problem Possible causes
Other messages
OUT OF RANGE
°C OUT OF RANGE
Measured value out of
range.
Measured temperature out
of range.
pH value < -2 or > 16, mV < –1500 or > 1500.
The current output will be frozen at 22 mA.
(Alarm).
Pt 1000 broken or temperature < –20 or >
150°C
. The current output will be frozen at 22
mA. (Alarm)
On display Problem Possible causes
si627 P_HACH_LANGE_Ed.0510.indd ANG:19 si627 P_HACH_LANGE_Ed.0510.indd ANG:19 20/5/10 10:50:49 20/5/10 10:50:49