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Instruction Manual MM850099 ed.02a
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2.8
Measuring mode - power (Passive external circuit)
The instrument provides 24V dc power for operating a 2-wire transmitter and, simultaneously, reads the
loop current in percent (-25.0 to +100,0%) or milliamperes (0.00 to 20.00 mA).
2.9
Power supply mode
The instrument can be used as a loop power source (24V dc with a maximum current of 22 mA).
2.10
IN-OUT technical unit mode (%)
The instrument converts the voltage signal into %, or vice-versa, with the following linear relation:
0
4
12
20
-25.00%
0.00%
+50.00%
+100.00%
2.11
Scale factor
Easy menu-driven set-up to read or simulate electrical signal value in terms of technical units (i.e. bar,
% CO, RH, etc.).
2.12
Square root
Can be programmed during the set up procedure (linear ranges only) e.g. to obtain direct readings of
flow from a dP transmitter signal.
The display limits are 0 to +2500.
2.13
Average mode
For the measurements of unstable input signals by a progressive averaging of a programmable number
of conversions (approximately 10 seconds)
2.14
Hold function
To freeze on the display the last measured value.
2.15
Digital interface
A digital interface, with TTL logic levels, is available as standard for communications with external units.
A 4 wire cable, with a male mini connector, and an auxiliary module for TTL to RS232 conversion is
available as an option.
2.16
Case
