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C
3
HAPTER
L
A
IMIT
NALYSER
1. impuls contact
2. impuls contact
3. permanent contact → without stop of analysis
4. permanent contact → with analysis stpo
power failure
lack of indicator
error zero transmission → insufficient brightness before the addition of indicator
measurement error
I
C
NSTALLATION AND
3.4
connection of relay outputs
limit exceed
Signal devices and valves can be switched on when the limit is exceeded. The
relay switches as → permanent contact or alternatively as → impuls contact to
trigger a control system for the regeneration of a water treatment plant.
Using the program switches S4 and S5 (→ page 32) to set different functions for
the relay REL1.
→
3 seconds
→ 60 seconds
→ auto-quit of alarm.
the left red LED flashes until reset-button is pressed
→ It will be further analysis carried out in the selected interval
→ alarm is active and must be quit manually
the left red LED flashes until reset-button is pressed
→ It will be no further analysis carried out in the selected interval until the
alarm is reset.
mal function
Relay REL2 signal malfunctions. It is normally closed in case of no malfunction.
The following faults are signalled:
→ unit is switched off (relay drops)
→ content of indicator bottle is lower than app. 10%
→ refer to page 32: BOB-operation
•
pollution of measuring chamber
•
pollution of water sample or turbidity effects
•
malfunction of electronic
→ insufficient difference of measured value before and after addition of
indicator
•
no indicator was dosed
•
no water in measuring chamber
•
no homogenisation (magnetic stirrer misses or agitator failure)
OMMISSIONING
→ relay REL2
→ relay REL2
P
25
AGE
terminal 7 / 8 / 9
terminal 10 / 11 / 12
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