Reverse Acting Field Calibration; Bench Calibration - Magnetrol ES Modulevel Installation And Operating Manual

(—) (+)
P4
P3
— TB1 +
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E Z MODULEVEL
5300 BELMONT ROAD,
DOWNERS GROVE, IL 60515,
USA.
HEIKENSSTRAAT 6,
B 9240 ZELE,
BELGIUM.
www.magnetrol.com
REFER TO MODULEVEL MANUAL,
BULLETIN 48-615, FOR
INSTALLATION AND OPERATION
INSTRUCTIONS.
TP2
ASSEMBLY PART NO.
30-2163
REV.
S1
DIR.
TP1
Direct/Reverse Switch
Figure 14
Analog EZ Transmitter
PC Board
11

2.4.2 Reverse Acting Field Calibration

4 mA SET
1. Remove power from unit.
R8
2. Remove transmitter housing cover.
3. Locate the Direct/Reverse switch on the PC board.
4. Move the Direct/Reverse switch to "REV."
5. Replace and tighten the transmitter housing cover until
6. Bring process up to operating temperature.
R13 AGC
7. Unscrew and remove protective covers from zero and
J1 8. Rotate the span control counterclockwise fully,
05-9118-001
9. Rotate the zero control counterclockwise fully,
10. Establish liquid level at the desired 4 mA (100%) level on
11. Adjust the zero control to until the output signal is
12. Replace cover on zero control.
13. Establish liquid level at the desired 20 mA (0%) level on
14. Adjust the span control until the output signal is 20.00 mA

2.4.3 Bench Calibration

1. Disconnect field wiring at the junction box.
2. Loosen the housing base lock screws. See Figure 3 on page 4.
3. Remove transmitter housing cover.
4. Remove c-ring from enclosing tube using snap ring pliers.
5. Slide transmitter on housing base upward until clear of the
Analog EZ Modulevels are factory set for direct action
(rising level increases output signal). The following
adjustment is required for reverse action.
See Figure 14.
the o-ring is compressed.
span controls. See Figure 13 on page 10.
approximately 20 turns.
approximately 20 turns.
the displacer.
4.00 mA (0% on transmitter with analog meter).
the displacer.
(100% on transmitter with analog meter).
The Analog EZ Modulevel can be bench calibrated using
the calibration stand (P/N 31-6107-001) (except units that
have been calibrated for interface service. Bench callibra-
tion cannot be performed on interface models). The fixture
includes an open-topped enclosing tube upon which the
transmitter head is mounted and an adjustment rod which
simulates level movement of liquids with various S.G.s.
To remove transmitter head from control:
enclosing tube.
48-618 ES/EZ Modulevel Displacer Level Transmitter (Top Hat Assembly Design)