Operating Modes - Bühler technologies BPM Guía Rápida

BPM

5.3.2 Operating Modes

There are four operating modes which can be configured in
the menu.
When a measurement starts, the internal laser automatically
adjusts. This process can be identified by the symbol [ ] flash-
ing in the display and typically takes approx. 2 to 3 seconds.
After this, the symbol will light up steady and measurement
starts.
Pause mode can be identified by the [II] symbol.
NOTICE! Measurement times must be between 30 and 300
seconds. For cleanliness levels according to ISO 4406:99 of
15 (at 4 µm©) and better, the measurement time should
be at least 120 seconds. The default is 60 seconds.
5.3.2.1 Timed Measurement
The BPM uses the set measurement time and pauses between
measurements. Here, note the following setting options:
Setting limit Min. value/seconds Max. value/seconds
Measurement time 30
Pause time 1
Measurement time
60
factory setting
Pause time factory 10
setting
Tab. 9: Setting limit timed measurement
The default setting of 60 seconds measurement time and
10 seconds pause yields a new measurement every 70 seconds.
Note on the time data in the start screen:
• Measurement running: Time remaining to the end of
measurement (countdown)
• Pause mode: Time remaining to the next measurement
(countdown)
5.3.2.2 Digital I/O
A measurement is running [ ] as long as pin 5 of the M12
plug is connected to the supply voltage (L+) or is not connec-
ted. When connecting pin 5 to earth (L-, Pin 2), pause mode [II]
is active.
The maximum input current on pin 5 is 10 mA.
Note on the time data in the start screen:
• Measurement running: Elapsed time (incremental)
• Pause mode: Measurement time display for the last
measurement (static display)
Assignment pin 5
Supply voltage (L+)
Not connected
Earth (L-, Pin 2)
Tab. 10: Assignment pin 5 for measuring mode I/O
18 Bühler Technologies GmbH
300
86400 (24 h)
Function
Measurement running [ ]
Measurement running [ ]
Pause mode [II]
5.3.2.3 Key
There are two options for starting and ending a measure-
ment.
• Manually pressing the [
• Using a "Start" and "Stop" command via the communica-
tion line. This can be done using RS232, CANopen or CAN
J1939.
After completing a measurement, the measurement result
will appear in the start screen. The recommended minimum
and maximum measurement time must be observed.
Note on the time data in the start screen:
• Measurement running: Elapsed time (incremental)
• Pause mode: Measurement time display for the last
measurement (static display)
5.3.2.4 Automatic
In automatic mode, the measurement time is determined dy-
namically depending on the flow rate and the particle concen-
tration.
A measurement runs until the following conditions are met:
• A defined number of particles was detected AND
• the measurement time is at least 45 seconds OR
• the measurement time is greater than 300 seconds
Once the conditions are met, the result in determined and dis-
played. The number of necessary particle can be changed via
the serial port with the command "WAutoParts". However,
this should only be changed by an experienced user. The fact-
ory setting is 200.
Note on the time data in the start screen:
• Measurement running: Elapsed time (incremental).
• Pause mode: Not used, a new measurement is automatic-
ally started.
6 Maintenance
Always observe the applicable safety and operating regula-
tions when performing any type of maintenance. For informa-
tion about maintenance, please refer to the original operating
instructions on our website at www.buehler-technolo-
gies.com.
7 Service and Repair
For a detailed description of the device and information about
troubleshooting and repair, please refer to the full operating
instructions on our website at www.buehler-technolo-
gies.com.
] key.
BX150102 ◦ 03/2021