FCI ST51 - Transmitter Calibration Check; Calibration Procedure and Equipment

FLUID COMPONENTS INTERNATIONAL LLC ST51 MASS FLOW
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Transmitter Circuit Calibration Check (Delta R Verification)
References
Delta ‘R’ Data Sheet
Equipment
FC88 Communicator or equivalent.©
DMV
Delta R Data Sheet-Match by serial numbers
2 Precision Decade Resistance boxes, 0.1% (Largest steps: 1K Ohm, smallest steps 0.01 Ohms)
Small flat Blade Screwdriver, 3/32 inches wide blade
FCI Normalization Cable, FCI part number 006407
Procedure
1. Verify all “D” mode calibration parameters are correct according to the meters Delta R Data Sheet, before starting verification.
2. Turn power off
3. Mark all sensor element wires connected to the circuit board, so they may be reconnected to the proper terminals. Disconnect the
wires.
4. Connect the resistance decade box to the electronics as per the appropriate diagram for the ST51.
NOTE: Interconnector wiring (resistance decade box to electronics) must be 24 AWG and 45 inches long, to avoid any
inaccuracies in the Delta R verification, caused by improper wire lengths or wire gauges.
5. Set both decade boxes for the nominal resistance value (1000 ohms) +/- .01%
6. Connect DVM to the meters output termination and monitor the meter output.
7. Turn the power ON and allow the instrument 5 mins. To stabilize
8. With the FC88 connected, Press [T] [Enter] to view the Normal Operating Mode.
9. Adjust the Active Decade Box (Reference decade box remains fixed @ 1000 ohms) to achieve the appropriated Delta R for the
displayed flow value and output, noted on the meters Delta R Data Sheet.
10. Note the [C] mode and verify the meters displayed TCDR and REFR values corresponding to the displayed flow rate as per the
meters Delta R Data Sheet.
11. Return to the [T] mode to continue the verification.
REFERENCE
NORMALIZATION CABLE
FCI P/N 006407
BLACK
BLACK
ORANGE
ORANGE
1433-W DECADE R ISISTOR GENERAL R ADIO USA
9
8
7
6
X
G
23mA MAX
1K STEPS
H
L
10 K
2
0
1
4
5
3
ACTIVE
6
8
9
X
6
7
100 STEPS
80mA MAX
2
1
0
4
3
5
2
1
4
5
3
1433-W DECADE R ISISTOR GENERAL R ADIO USA
X
6
7
8
9
G
1K STEPS
23mA MAX
H
L
10 K
1
0
2
4
5
3
7
6
X
9
8
6
100 STEPS
80mA MAX
0
1
2
5
3
4
1
2
4
5
3