Magnetrol ES Modulevel, Инструкция по установке и эксплуатации

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2.4.2 Reverse Acting Field Calibration
Analog EZ Modulevels are factory set for direct action
(rising level increases output signal). The following
adjustment is required for reverse action.
1. Remove power from unit.
2. Remove transmitter housing cover.
3. Locate the Direct/Reverse switch on the PC board.
See Figure 14.
4. Move the Direct/Reverse switch to “REV.”
5. Replace and tighten the transmitter housing cover until
the o-ring is compressed.
6. Bring process up to operating temperature.
7. Unscrew and remove protective covers from zero and
span controls. See Figure 13 on page 10.
8. Rotate the span control counterclockwise fully,
approximately 20 turns.
9. Rotate the zero control counterclockwise fully,
approximately 20 turns.
10. Establish liquid level at the desired 4 mA (100%) level on
the displacer.
11. Adjust the zero control to until the output signal is
4.00 mA (0% on transmitter with analog meter).
12. Replace cover on zero control.
13. Establish liquid level at the desired 20 mA (0%) level on
the displacer.
14. Adjust the span control until the output signal is 20.00 mA
(100% on transmitter with analog meter).
2.4.3 Bench Calibration
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:
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
enclosing tube.
11 48-618 ES/EZ Modulevel Displacer Level Transmitter (Top Hat Assembly Design)
P4 P3
— TB1 +
¤
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.
R13
J1
TP2
TP1
S1
AGC
ASSEMBLY PART NO.
30-2163
05-9118-001
R8
J
2
4 mA SET
(—) (+)
REV.
DIR.
Figure 14
Analog EZ Transmitter
PC Board
Direct/Reverse Switch