Dynasonics TFXM Series Ultrasonic Multi-Channel Flow Meter - Manual (Page 54)

Rev. 8/02
-3. 16- TFXM
FL 20MA = 100.0
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 re-
quire 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 4-20mA IN or 4-20mA OUT, Fig. 1.4 ).
2. Using the arrow keys, increase the numerical value to in-
crease 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
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