To bench calibrate the Digital ES II transmitter:
1. Connect supply voltage and meter, if necessary, to termi-
nals in junction box. See Figure 18 on page 14.
2. Slide the electronics head over the open topped enclosing
tube of the calibration stand, making sure that the white
plastic washer is in place below the electronics head.
See Figure 15 on page 13.
3. Push the adjustment rod completely down into the enclos-
ing tube to simulate low level.
4. Press the ENTER key to start calibration. The ZERO LED
will light. Loop will go to 22 mA.
5. Press the DOWN key to lock in the 4 mA value. The
ZERO LED will flash and remain on. Loop will stay at
22 mA.
6. Press ENTER to confirm the setting. The ZERO LED
will go off. Loop will go to 4 mA.
7. 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.
8. Press ENTER to start calibration. The ZERO LED will
light. Loop will go to 22 mA.
9. Press UP to lock in the 20 mA value. The ZERO LED
will go off. The SPAN LED will be on. Loop will go to
20 mA.
10. Press ENTER to confirm the setting. The SPAN LED
will go off. Loop will stay at 20 mA.
Note: To calibrate for reverse action, follow the same proce-
dures as above, but calibrate 4 mA as 100% (adjust-
ment rod at your S.G.) and 20 mA as 0% (adjustment
rod all the way down).
3.4.3 Digital Meter Calibration
The digital meter on the Digital ES II Modulevel is set at
the factory to display 00.0% when the loop current is
4.0 mA and 100.0% when the loop current is 20.0 mA.
The following instructions may be followed if a different
configuration is required. Regardless of the configuration
of the numeric display, the analog bar graph represents
4 – 20 mA directly. Meter configuration does not affect
the loop current and is easily done with no additional
equipment.
1. Remove transmitter junction box housing cover.
2. Unscrew and remove the transparent meter cover.
18
48-618 ES/EZ Modulevel Displacer Level Transmitter (Top Hat Assembly Design)