Subject to change · V 2.02.20 · EN
Page 23
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11.2 Operating modes
Four operating modes are available, which can be specified in the menu.
At the beginning of a measurement the internal laser adjusts automatically. This process can be seen by the flashing of the symbol
[] on the screen and usually takes about 2 to 3 seconds. Thereafter, the symbol lights up permanently and measurement starts. The
pause mode is shown by the symbol [II].
Measuring times between 30 and 300 seconds need to be observed. For cleanliness of 15 (at 4µm(c)) and better
(according to ISO 4406:17), the measuring time should be at least 120 seconds. Standard setting for the measuring
time is 60 seconds.
11.2.1 Time-controlled measurement
The OPCom Particle Monitor works with the set measuring time and pause times between measurements. The following settings are
to be observed:
Parameter Min. value / seconds Max. value / seconds
Measuring time 30 300
Pause time 1 86400 (24h)
Factory setting measuring time 60
Factory setting pause time 10
The standard setting of 60 seconds measuring time and 10 seconds pause time, provides a new measurement result every 70
seconds.
Information regarding time specification on the start screen:
› Running measurement: Time remaining to the end of measurement (down counter)
› Pause modus: Time remaining to the next measurement (down counter)
11.2.2 Digital I/O
A measurement is in progress [], as long as Pin 5 of the M12 plug is placed on the supply voltage (L+) or is not connected. If Pin 5
is connected to the ground (L-, Pin 2), the pause mode [II] is active.
The maximum input current at Pin 5 is 10mA.
Information regarding time specification on the start screen:
› Running measurement: Elapsed time (up counter)
› Pause mode: Displays the measuring time of the last measurement (static display)
Assignment pin 5 Function
Supply voltage (L+)
Running measurement []
Not connected
Running measurement []
Ground (L-, Pin 2) Pause mode [II]
11.2.3 Button
There are two ways to start or finish a measurement.
› By manual pressing of the button [ ].
› By a "Start" and "Stop" command via the digital communication line.
This can be done via RS232, CANopen or CAN J1939.
After the end of a measurement, the measuring result is shown on the start screen.
The compliance with the recommended measuring times needs to be ensured.
Information regarding time specification on the start screen:
› Running measurement: Elapsed time (up counter)
› Pause mode: Displays the measuring time of the last measurement (static display)
Table 9: Parameters time-controlled measurement
Table 10: Assignment Pin 5 for measuring mode I/O
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