KROHNE OPTISWITCH 5100C 2wire EN - Manual (Page 23)

on correct function. The following operating conditions are
simulated during the test:
l
Fault signal
l
Empty signal
l
Full signal
Check if all three switching conditions occur in the correct
sequence and the stated time period. If this is not the case,
there is a fault in the measuring system (see also the operating
instructions manual of the signal conditioning instrument).
Keep in mind that connected instruments are activated during
the function test. By doing this, you can check the correct
function of the measuring system.
(after releasing the test key)
Sensor
current -
Sensor
Level re-
lay A -
overfill
protection
Level re-
lay B - dry
run pro-
tection
Signal
lamp A -
Overfill
protection
Signal
lamp B -
Dry run
protection
Fail safe
relay
Control
lamp
1. Fault signal
(approx. 3 s)
<2.0 mA currentless currentless currentless
2. Empty signal
(approx. 1.5 s)
approx. 8
mA
energized currentless energized
3. Full signal
(approx. 1.5 s)
approx. 16
mA
currentless energized energized
4. Return to the actual
operating condition
Note:
Mode B is not permissible when used as part of an overfill
protection system acc. to WHG and use in measuring chains
acc. to IEC 61508.
You can carry out the function test with the outputted current
values also directly with a PLC or a process control system
(WHG).
Test procedure
OPTISWITCH 5100 C, 5150 C - with two-wire output 23
Set up
30430
-EN
-060831