To install transmitter head on calibration stand, carefully
slide the white teflon spacer and LVDT assembly down
over the open topped enclosing tube. Be certain that both
the LVDT assembly and the housing base are fully seated
on the fixture. See Figure 15 on page 13.
To bench calibrate the Analog EZ transmitter:
1. Connect appropriate supply voltage and meter, if
necessary, to terminals in junction box.
See Figure 5, 6, 7 & 8 on pages 6-7.
2. Unscrew and remove protective covers from zero and span
controls. See Figure 13 on page 10.
3. Rotate the span control counterclockwise fully, approxi-
mately 20 turns.
4. Rotate the zero control counterclockwise fully, approxi-
mately 20 turns.
5. Push the adjustment rod completely down into the enclos-
ing tube to simulate low level. See Figure 15 on page 13.
6. Adjust the zero control until the output signal is 4.00 mA
(0% on transmitter with analog meter).
7. Replace cover on zero control.
8. Lift the adjustment rod until the top of the enclosing tube
is aligned with the marking on the rod that corresponds to
the S.G. of your process liquid.
9. Adjust the span control until the output signal is 20.00 mA
(100% on transmitter with analog meter).
10. Replace cover on span control.
11. Disconnect power and meter (if used) and remount
transmitter head onto control by reversing the removal
procedure.
Note: Bench calibration does not compensate for elevated
process temperatures.
Note: To bench calibrate for reverse action, after moving the
Direct/Reverse Switch to “Rev” position, adjust the zero
control with the adjustment rod positioned at the S.G.
marking on the rod. Adjust the span control with the
adjustment rod down until firmly seated on calibration tube
(see “Bench Calibration” procedure above).
12
48-618 ES/EZ Modulevel Displacer Level Transmitter (Top Hat Assembly Design)
