BCM-MS, BCM-LS
4.1.3 Setting Analog Current Outputs
The two analog current outputs are factory preset. Channel 1 (Pin 6) is the temperature output, channel 2 (Pin 7) the relative hu-
midity. However, the sensor allows changing the preset output parameter. The command is: "SAO1x[CR]" and "SAO2x[CR]" with
the corresponding numerical code x. The following table shows the possible parameters for configuring the analog outputs.
Numerical code x
Parameter
0
Temperature (T)
1
Relative humidity (RH)
2
Absolute humidity (AH)
1
3
Aging progress (AP)
4
Relative permittivity (P)
5
Relative permittivity at 40 °C (P40)
6
Conductivity (C)
7
Conductivity at 40 °C (C40)
8
Relative humidity at 20 °C (H20)
9
Relative humidity at 40 °C (H40)
10
Liquid level
2
11
log(conductivity) (log(C)) (Version 1.21.12 and up)
12
log(conductivity at 40 °C) (log(C40)) (Version 1.21.12 and up)
30
Alarm
4mA = no alarm
20mA = oil level low (sensor in air or if level sensor oil level < set minimum) or free water (>95 %) or very
high water content (>75 %) or maximum oil temperature setting exceeded
40
Sequential output of T, rel. H, P, C, P40, C40, AP and L
2
100
Output fixed to 4 mA
101
Output fixed to 12 mA
102
Output fixed to 20 mA
Tab. 16:
Numerical code for output parameters of the analog current outputs
1
This setting requires special calibration.
2
Only available for level sensors.
4.1.3.1 Sequential Output Of Values
Key parameters can be output sequentially via the analog interfaces. In this case the sensor is configured as specified in chapter
Setting Analog Current Outputs
[> page 23]. The correspondingly configured sensor outputs the key parameters as shown be-
low.
Start character
Current
Time
Start character
1 Liquid level only available with level sensors.
If no liquid level is output,
the entire message is 4 seconds shorter.
Fig. 8: Sequential output of values via analog interface
23
Bühler Technologies GmbH
BE150104 ◦ 03/2021
