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28
Electrical installation
Relay output 2 (unit fault or reagent message BoB)
Terminal 8/7/6 - Yellow, Grey, Pink
Relay output 2 is used to signal unit malfunctions or reagent message BoB (reagent shortage).
If the analyser is in normal operation and there is no malfunction, relay output 2 is energised and
the connection is switched from COM to NO (wire breakage safety). If a fault is detected, relay
output 2 drops out and makes the connection from COM to NC.
The following faults are signalled:
•
Power failure
o
The analyser is switched off (relay output 2 has dropped out).
•
Reagent message
o
The content of the reagent bottle is below approx. 10 %.
•
Error zero sample (no sufficient brightness before reagent addition)
o
The measuring chamber is dirty.
o
The sample/measuring water is contaminated or turbid.
o
The electronics are defective.
•
Error measurement (no sufficient difference of the measured value before and after the
reagent addition)
o
No reagent was dosed.
o
There is no water in the measuring chamber.
o
Mixing did not take place (agitator blade missing or magnetic agitator defective).
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Illustration 12: Electrical installation - relay output 2 (junction box)
Relay 2 is always energized during normal operation:
Connection COM to NO (wire breakage safety)
Содержание 32-074165
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