Dynasonics MFX Series Insertion MagProbe Flow Meter - Manual (Page 43)

Rev. 01/11
-3.9- MFX
For example, to span the 4-20mA output from 0 GPM to +100 GPM,
with 12mA being 50 GPM, set the FL 4MA and FL 20MA inputs as
follows:
FL 4MA = 0.0
FL 20MA = 100.0
The 4-20mA ISO-MOD is factory calibrated and should not require
adjustment unless it is replaced.
The CAL4MA entry allows fine adjustments to be made to the “zero”
of the 4-20mA output. To adjust the 4mA output, an ammeter or
reliable reference connection to the 4-20mA output must be present.
Procedure:
1. Disconnect one side of the current loop and connect the
ammeter in series (disconnect either wire at the terminals
labeled +/- on the
ISO-MOD 4-20mA module).
2. Using the arrow keys, increase the numerical value to increase
the current in the loop to 4mA. Decrease the value to decrease
the current in the loop to 4mA. Typical values range between 40-
80 counts.
Re connect the 4-20mA output circuitry as required.
Calibration of the 20mA setting is conducted much the same way as
the 4mA adjustments.
Procedure:
1. Disconnect one side of the current loop and connect the
ammeter in series (disconnect either wire at the terminals
labeled +/- on the
ISO-MOD 4-20mA module).
2. Using the arrow keys, increase the numerical value to increase
the current in the loop to 20mA. Decrease the value to decrease
the current in the loop to 20mA. Typical values range between
3700-3900 counts.
Re connect the 4-20mA output circuitry as required.
PART 3 - KEYPAD CONFIGURATION
NOTE: The CAL 4MA and CAL 20MA entries should not be used
in a attempt to set the 4-20mA range. Utilize FL 4MA and FL
20MA, detailed above, for this purpose.
4-20mA
Calibration