Ametek Z-tron IV, Инструкция по установке и эксплуатации

Страница: 26 / 42

20
Z-tron IV
TM
Point Level Control
DESIRED
CONTROL
POINT
Figure 4-1
Level Below Horizontal
Sensing Element
Figure 4-2
Level Above Horizontal
Sensing Element
Figure 4-3
Level Covering Vertical
Sensing Element
4.3 Calibration in Insulating Material [Vertical Mount]
The following procedure is for high level fail-safe. If the unit
is set for low level fail-safe LED operation will be opposite:
1) Be sure the material level is well below the sensing
element. See Figure 4-1.
2) Turn the setpoint adjustment counterclockwise (CCW)
until the red LED is on (red LED on indicates that
the relay is de-energized and the unit is in the alarm
condition).
3) Turn setpoint adjustment slowly clockwise (CW) until
the relay just operates. (red LED off).
4) Raise the level to a point on the active section of the
sensing element where control is desired. Red LED
should be on. See Figure 4-3.
5) Counting the number of turns, turn the setpoint
adjustment clockwise (CW) until the red LED just turns
off.
6) If less than 1 turn is required consult factory.
7) Turn setpoint adjustment slowly counterclockwise
(CCW) until the relay just operates. (red LED on).
8) Calibration is complete.
If dielectric constant or conductivity of material
changes, point of operation may change. Consult
factory.