USF Wallace & Tiernan DEPOLOX 4, Manual

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ERROR MESSAGE CAUSE REMEDY
*µA? The meausring cell current Check concentration of
of DEPOLOX 3 or 4 is chlorine in sample water
outside the limits of (> 10 mg/l?)
- 5 µA...+ 200 µA Check measuring cell
(short circuit)
DEPOLOX 4: check bias
voltage in P menu.
*mV? The voltage of pH-value or Check electrode connections
Redox electrode is outside (cable poles, correct
the limits of pH 0..14 / matching of electrodes and
Redox 0...1000 mV amplifiers, e.g. pH electrode
connected to pH amplifier).
*mA? Excessive ohmic resistance. Check whether mA signal
The amplifier cannot drive is required (e.g. for recorder).
the impressed mA output If not, inactivate output
current through the signal by selecting "- - -"
connected current loop in the P menu, parameter
(500 Ohm at 20 mA) selection "mA".
Admissible ohmic resistance:
4...20 mA - 500 Ohm
Check mA-signal cable for
0...10 mA - 1000 Ohm discontinuities.
0... 5 mA - 2000 Ohm
*CSP? Set-point error. Readjust controller set-point.
After a change in the
measuring range, the
controller set-point is outside
the selected range.
*Al ? Error limit value MAX Readjust alarm contacts.
*Al ? Error limit value MIN
After a change in the
measuring range, HI alarm
or LO alarm contacts are
outside the selected range.
*OPTION? Both Pt100 and positioner Switch positions S1-3 and
feedback were selected. S5 must match the built-in
(Cl
2
) invalid option selected option.
(pH, mV, F
-
).
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