wtw pH 171 2K, Operating Manual

Page: 107 / 160

Configuration
111
Function as limit contact
If a relay is configured as a limit contact with UL / LL, free assignment to a parameter is possible.
The relay can be assigned to the following parameters:
Parameter Parameter Explanation
UL pH A LL pH A UL = Upper limit value
UL mV A LL mV A LL = Lower limit value
UL TEMP A LL TEMP A pH = pH value
UL pH B LL pH B mV = Voltage measurement (Redox)
UL mV B LL mV B TEMP = Temperature
UL TEMP B LL TEMP B A = Channel A
UL pH A-B LL pH A-B B = Channel B
UL mV A-B LL mV A-B A-B = Difference A-B (only in D
UL TEMP A-B LL TEMP A-B operation mode)
Parameters which have already been assigned are no longer offered in the menu during the
configuration of the next relay.
Selection make contact (close) / break contact (open)
In the submenu CONF REL O/C the function of a relay as make contact or break contact is laid
down.
Setting:
Submenu "CONF REL O/C“.
With enter submenu
" CONF REL O/C ".
Relay 1 is closed in an active condition.
With select between
CLOSE or
OPEN.
With accept and go on to
setting of relay 2.
The relays 2 to 4 can be configured in the same way as make contacts or break contacts.
Exception: If a relay is assigned to the POWER FAIL function it always works as a break
contact. (With power failure, all relays are open!)
After the function for the last relay has been set the program goes back to the beginning of the
configuration menu; the display shows CONFIG.