Analog Output; Analog Output Overrange Behavior; Table 3 Analog Output Values In Different Transmitter Statuses - Vaisala MHT410 User Manual

MHT410 User Guide
5. Analog Output
There are three analog output channels available for H
4 ... 20 mA current outputs.
The parameter for each output is configured at the factory according to order. If needed, you
can change the parameters using the asel command via Vaisala Industrial Protocol.
Table 3 Analog Output Values in Different Transmitter Statuses
Transmitter Status
Normal
Error
Measurement not ready
More Information
‣ Analog Output Commands (page 62)
5.1 Analog Output Overrange Behavior
If the measured hydrogen, moisture and temperature levels go below or above their scaled
range, the analog output is clipped at the low (4 mA) or high (20 mA) end of the output range.
This means the analog output will not indicate measurement readings that are outside the
scaled ranges.
If needed, you can allow the analog outputs to extend 10 % of the range over 20 mA using the
aover command via Vaisala Industrial Protocol. With this extension, the allowed range for
analog outputs is 4 ... 21.6 mA. The aover command does not affect the scaling of the outputs.
You can also change the scaling of the outputs for each channel using the asel command via
Vaisala Industrial Protocol.
36
Analog Output Value
4 ... 20mA
3.5 mA (default)
3.0 mA
, moisture in oil, and temperature using
2
M211737EN-F