3.3
Hazardous Location Wiring
See Figure 11 on page 9 for proper installation of Digital
ES II for intrinsically safe locations. Proper installation of
Digital ES II with intrinsically safe connections and non-
incendive wiring is illustrated in Figure 12 on page 9.
3.4
Digital ES II Push-Button Calibration
The Digital ES II Modulevel must be calibrated for each
unique application. It may be calibrated using the push-
buttons on the PC board or using a HART communicator.
The HART hand-held communicator allows advanced
calibration.
The Digital ES II Modulevel may be calibrated in service or
on a bench calibration stand (P/N 31-6107-001) (except
units that have been calibrated for interface service. Bench
callibration cannot be performed on interface models).
Bench calibration provides a convenient way to set up the
transmitter before going to the tank site to complete the
installation. Bench calibration, however, does not compen-
sate for elevated process temperatures and must be fine
tuned in the field.
3.4.1 Push-button field calibration
1. Bring process up to operating temperature.
2. Establish liquid level at desired 4 mA (0%) level on dis-
placer. If 4 mA level is at the bottom of the displacer,
4 mA point may be set with displacer hanging free in vapor.
3. With unit power on, remove cover.
4. Press the ENTER key to start calibration. The ZERO LED
will light. Loop will go to 22 mA. See Figure 20 on page 16.
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. Establish liquid at the 20 mA (100%) level on the displacer.
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.
Zero level, 4 mA output,
bottom of displacer
100% level,
20 mA output
Desired
level range
(direct acting)
...
ENT
ENT
Error LED
Zero LED
Span LED
Pushbuttons
Red LED
Figure 20
Digital ES II Push-button Calibration
16
48-618 ES/EZ Modulevel Displacer Level Transmitter (Top Hat Assembly Design)
