Honeywell 301 Serie Mode D'emploi page 85

There is also a basic Raw Unit* conversion formula for non-standard 0-20 mA devices:
In this formula, there is no 4mA offset, which enable the controller to read devices that do not adhere to the 4-
20 mA standard. Note that, in this mode, no fault will be generated for signal readings below 3 mA (for 301-
ADI) or below 1 mA (for 420MDBS).
*Raw units represent the following measurement types: mA, mV, V and no units.
** The mA range for the 301-ADI is 28 mA to 0, however, the range for the 420MDBS is 25 mA - 0 mA.
Special notes for 301-ADI and for 301-C (firmware version 2):
301-C Event menu: Measurement units other than PPM for all 4-20 inputs (identified as AI) will be displayed as
%, however the selected value will be correct and the even will function normally (as shown in the menu sam-
ples below).
It is not possible to program an event using a negative value with this version of the firmware.
78
(Loop current) x (range max - range
min)
(28 mA** - 0 mA) x (specified factor)
3. Events 001
Tx097
> 25.0%
range min
+
specified fac-
tor
1. Tx info 097
-Scale(2)-
Factor 00001
Units mA