Software Version C
- 154 -
optek-converter C4101 Version 07.2009_1.2US, 23.07.2009
www.optek.com
Note!
• The system calculates a negative CU value for the photo current when the
actual photo current is higher than the photo current at the last zero point
setting. In this case, you should check the absorbance and transmission
measurements.
• Turbidity causes the detector current to rise in channel A or B at sensor
TF16-N.
• Turbidity causes the detector current to fall in channel C or D at sensor
TF16-N.
• The measuring range should not exceed the MAX. RANGE.
• If necessary, increase the optical path length (OPL) or change the
measuring wavelength.
• If measuring results in CU exceed MAX. RANGE (detector current
approx. 0.25 nA), the system enables FAILSAFE and triggers the SIGNAL
LOSS error message.
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