wtw MultiLab P5, Руководство по эксплуатации

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Troubleshooting Troubleshooting
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BA61101/08.00/Pla/MLP5-E2 BA61101/08.00/Pla/MLP5-E2
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T= 23.3°C
C Ca¨ 0.01mKC¨
(C=1.000/cm)
à C<0.500/cm
Determine cell constant: The cell
constant is below 0.500/cm. With
confirmation the old value remains.
Possible cause / Action:
- Measuring cell with cell constant below
0.500/cm / The control of cells with a cell
constant below 0.5/cm is not useful and,
therefore, not contained in the program.
- Wrong or destroyed control solution
(use potassium chloride solution
c=0.01 mol/l only once)
/ Change control solution
Âmenu
TC Cal
¡TC 7.6 %/K
Í
Input temperature coefficient: The input
value is above 3.50%/K.
Action:
- Check whether the value is correct
(coefficients above 3.50%/K are very
rare)
- For measurement in pure water from
ion exchange facilities use the nLF
function.
T2= 23.3°C
TC Cal
®2= 1034µS/cm
à ÇT<10K
Determine temperature coefficient. The
temperature difference to first
measurement is lower than 10 K. Action:
Increase or decrease sample temperature.
T2= 23.3°C
TC Cal
®2= 1034µS/cm
à TC>3.50%/K
Determined temperature coefficient
higher than 3.50 %/K.
Possible cause:
- The temperature coefficient of the
sample solution is above 3.50%/K
/ Set temperature coefficient to 0 %/K
and perform the compensation manually.
Note: Temperature coefficients
above 3.5 %/K are very rare.
- The sample solution has chemically
changed during the measurement, e. g.
carbon dioxide has been absorbed or
lime has precipitated.
/ Depending on the aim of the
measurement and the characteristics of
the sample solution.
- Unusable or defective measuring cell
/ Change measuring cell.
TC Cal
ÀCal Error
There is no valid value for the
temperature coefficient stored in the
meter.
Action: Determine or enter temperature
coefficient.