ProMinent DULCOMETER Assembly And Operating Instructions Manual page 66

Operating menus for the measured variables pH and ORP
Setting
Display Starting
value
↳DELAY 0 s
OFF
↳ALARM OFF
Attention: If this setting is changed, all parameters are reset to the corresponding fac‐
1.
tory settings
↳CHECK = With configured pH measured variables, it is possible to monitor a sensor
connected to the potentiometric input for fault states. This check is disabled as standard.
Monitoring for sensor breakage: The sensor breakage check (glass breakage) identifies a
defective sensor due to its low internal resistance. Correctly functioning pH sensors have
very high resistances with internal resistances in the high MΩ range. The
DULCOMETER Compact Controller is capable of recognising broken sensors from their
®
internal resistance. This function should be deactivated if very low resistance sensors are
used.
Check for presence: The "Presence check" identifies a disconnected sensor or a broken
cable. This function should be disabled if pH sensors are used which have a high internal
resistance across their entire operating range.
66
Possible values
Increment Lower
value
1 s 0 s
ON
OFF
Upper Remarks
value
1000 s Contact input
switch-off delay.
Switching off of
the contact input is
delayed by this
period.
Switch on and off
use of the alarm
relay
HOLD'
'PAUSE/