Section 4 - Calibration; Quick Calibration - Ametek Drexelbrook Z-tron Level Control 502-302X Series Installation And Operating Instructions Manual

502-302 Series Z-tron
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SECTION 4
CALIBRATION
4.1 Types of
Calibration
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TM Level Control
The following paragraphs outline different calibration
procedures for the Z-tron Level Control (502-302
The high sensitivity 402-302X chassis is used primarily for
low bulk density granulars and extra short length sensing
elements used on insulating liquids. The 402-302X high
sensitivity chassis is used on the above applications be-
cause the standard chassis 402-3XXX does not have
enough sensitivity to perform reliably. The 402-302X is not
recommended for use on conductive products.
There are three methods of calibrating the high sensitivity
402-302X electronic unit:
1. Horizontal calibration.
2. Vertical calibration.

3. Quick calibration.

Horizontal calibration and Vertical calibration involve
moving tank level to establish proper calibration. These
methods produce the most accurate and repeatable calibra-
tion.
The Quick calibration procedure does not require moving
material to set calibration.
Calibration requires use of an insulated tool such as
Drexelbrook part number 290-1-1. See Figure 4-1.
Insulated Calibration Tool
11
Calibration
Figure 4-1
).
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