Section 1 - Introduction; System Description; Model Number - Ametek Drexelbrook Z-tron Level Control 502-302X Series Installation And Operating Instructions Manual

502-302 Series Z-tron
X
SECTION 1
INTRODUCTION
1.1 System
Description

1.2 Model Number

_________________________________________________________________________________
TM Level Control
This manual describes the Drexelbrook Z-tron
Control Series 502-3000 with a 402-3020 or 402-3022
high sensitivity transmitter.
The Drexelbrook Z-tron Level Control 502-3000 is a preci-
sion RF (radio frequency) relay output level switch. It
provides relay contact closure when material reaches a
preset point in a vessel. The standard double-pole, double
throw relay contacts may be used to operate alarms, sole-
noid valves, or other low power devices.
Cote-Shield TM action is designed into each unit and en-
ables the instrument to ignore the effects of most build-up
or material coatings on the sensing element, when prop-
erly installed and applied.
The Z-tron control is mounted so that the sensing element
is in or near the material being measured. It provides a
change in RF admittance indicating presence or absence of
material. The sensor is comprised of a: center (measuring
portion), and Cote-Shield
element guards against the transmission of RF current
through most coatings on the sensing element (from the
center measuring element to ground) until the level
reaches the setpoint. The Cote-Shield element also pre-
vents any change in RF current due to temperature effects
on the sensing element.
5 0 2 - 3 0 2 - 0 0 1
X
Electronic Unit Options:
0 - High Sensitivity
2 - High Sensitivity with
0-90 Second Time Delay
1
Introduction
TM portion. The Cote-Shield
Z-Tron Level Control
TM
Level