5. Unplug the LVDT eight pin connector from the socket at
P1 on the PC board.
6. Clip the plastic tie wraps which hold the cable to the PC
board.
7. Remove the four screws which hold the PC board to the
bracket.
8. Remove the c-ring from LVDT using snap ring pliers.
9. Carefully remove the transmitter PC board from the trans-
mitter housing.
10. Install new PC board by reversing above steps. Be certain
that the red wire is attached to the (+) terminal at TB1
and the black wire is attached to the (-) terminal at TB1.
4.5.2 Replacing LVDT
1. Remove power from the unit.
2. Remove the transmitter housing cover.
To remove old LVDT:
3. Locate the black wire which runs from the top of the
LVDT to the lower right hand corner of the transmitter
PC board. Remove the eight pin connector on this wire
from J1 on the PC board.
4. Remove the c-ring above the LVDT on the enclosing tube
using a snap ring pliers.
5. Carefully slide the LVDT from the enclosing tube. If
necessary, clip the plastic tie wrap on the transmitter
PC board.
6. Install new LVDT by reversing the above steps.
4.5.3 Checking the LVDT Winding Resistance
Refer to Figure 26 during this procedure.
1. Remove power from the unit
2. Remove the transmitter housing cover.
3. Locate the black wire which runs from the top of the
LVDT to the lower right hand corner of the transmitter
PC board. Remove the eight pin connector on this wire
from J1 on the PC board.
4. Using a multimeter, check the primary winding by verify-
ing that pins 2 and 6 of the eight pin connector have
approximately 78 to 117 ohms resistance.
5. Check the secondary winding by verifying that pins 1 and
5 or pins 4 and 8 of the eight pin connector have approxi-
mately 72 to 109 ohms resistance.
6. If the winding resistance is out of range, replace LVDT.
30
48-618 ES/EZ Modulevel Displacer Level Transmitter (Top Hat Assembly Design)
ENTER
UP
DOWN
E
R
R
O
R
S
P
A
N
Z
E
R
O
(—)
P2
(+)
P1
¤
— TB1 +
E S 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.
TP1
TP2
J1
05-9123-001
ASSEMBLY PART NO.
C-ring
TBI
J1
Bracket Screws
Figure 27
Digital ES II Transmitter PC
Board Mounting
