25
LRS 1-50 - USA - Installation & Operating Manual -
850704-01
Operation, alarm and test
Checking indications and the function of the MIN/MAX output contacts
Operation
Action
Indication
Function
Conductivity between MIN
and MAX.
The actual value is shown on
the 7-segment display. MIN
and MAX LEDs are not lit.
MIN output contacts 16/18 open,
17/18 closed.
MAX output contacts 21/23 open,
22/23 closed.
MIN alarm
Conductivity below MIN
switchpoint.
MIN LED lights up red
MIN output contacts 16/18 closed, 17/18
open.
MAX alarm
Conductivity above MAX
switchpoint.
MAX LED lights up red
MAX output contacts 21/23 closed, 22/23
open.
Test of MIN alarm and MAX alarm
Action
Indication
Function
In operating mode:
Conductivity between MIN
and MAX
Select Test parameter.
Press and hold push-button.
7-segment display: Test
flashes.
MAX LED lights up red for 3
seconds
MAX output contact 21/23 closed, 22/23
open.
MIN and MAX LEDs are not lit
for 1 second
MIN output contact 16/18 open,
17/18 closed.
MAX output contact 21/23 open,
22/23 closed.
MIN LED lights up red for 3
seconds
MIN output contact 16/18 closed,
17/18 open.
Test complete, release
push-button. 7-segment
display: Test is displayed.
Note: If you continue holding the push-button, the test sequence will start
again. You can cancel the test sequence at any time by releasing the
push-button.
Turn the rotary knob until the actual value is displayed.
Or after 30 s, the actual value is displayed automatically.
Fig. 5
MAX LED
red
MIN LED
red
7-segment
display
Rotary knob with
integrated
push-button
