Vaisala DMT143 - Manual (Page 45)

Chapter 5 _________________________________________________________________ Operation
VAISALA ________________________________________________________________________ 43
Set Analog Output Error Notification
If the transmitter is malfunctioning, the analog output is set to a specified
level. This overrides the normal measurement output of the channel. The
default level is 0 mA or 0V, according to the output type. You can set the
level using the AERR command.
AERR [level]
where
level = Error level for the analog output channel. Available range
depends on the output type (check with AMODE command).
Example (check settings):
amode
Ch1 output : 4 ... 20 mA
aerr
Ch1 error out : 0.000 mA
Example (set analog channel error level to 20 mA):
aerr 20
Ch1 error out : 20.000 mA
NOTE The error output value is displayed only when there are minor electrical
faults such as a sensor damage. When there is a severe device
malfunction, the error output value is not necessarily shown.