Calibration
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Section 4: Calibration
This section contains the calibration information for the
Z-tron III Level Control.
CAUTION:
Do not open enclosure cover or make/break any
electrical connections without first disconnecting
electrical power at the source. Ensure that area is
non-hazardous. Ensure that wiring, electrical fittings
and conduit connections conform to the electrical
codes for the specific location.
The Z-tron III level control is a general purpose device
and is not agency approved for use in hazardous
locations. If agency approval is required, contact your
local AMETEK Drexelbrook representative or call
1-800-553-909
4.1 Calibration in Conducting Material
All Z-tron III controls are factory set to switch in water-
based conducting materials [setpoint adjustment is set to
full clockwise (CW) position]. No calibration adjustment is
necessary.
If this instrument had been previously adjusted for use in a
insulating materials, and is now intended for use in a
conducting material, use a small screwdriver to turn the
setpoint adjustment to the full clockwise (CW) position. No
other adjustment is necessary.
4.2 Calibration in Insulating Material [Horizontal Mount]
Use the following procedure:
1. Be sure the material level is well below the sensing
element.
See Figure 4-1.
2.. Turn the setpoint adjustment to the full
counterclockwise (CCW) position.
This 20-turn potentiometer does not have a
mechanical stop. Turn 20 times to assure that you are
at the extreme end. No damage will occur.
The LED (on) indicates that the relay is energized or
in normal condition (not alarm).
3. Turn setpoint adjustment slowly clockwise (CW) until
the relay just operates. (LED changes state).
4. Increase the material level until it is well above the
sensing element.
See Figure 4-2.
(LED changes state).
5. Mentally note the position of the screwdriver.
6. Counting the number of turns, turn the setpoint
adjustment slowly clockwise (CW) until the relay once
again just operates.
