K-Patents PR-23 - Manual (Page 55)

6 Configuration and calibration 47
NAMUR NE 43 uses the 3.8 to 20.5 mA signal range for measurement information,
with ≥21 mA or ≤3.6 mA to indicate diagnostic failures (see figure 6.11). With that
information, it is easier to detect a failure condition on a refractometer, for example,
it clearly tells you whether you have an empty pipe or a failed instrument.
0 3.6
3.8
4 20
20.5
21
mA
failure OK
Measurement Data
failure
Figure 6.11 Default mA output values
−
6 MANUAL SET allows you to set different output values to check the output signal.
Press the BACK key to return normal output function.
Note: If you want to ’turn off’ the mA output, select NOT DEFINED in the Source menu.