Robertshaw 5318B, Инструкция по эксплуатации, Страница: 7 / 30

MODEL 5318B INSTRUCTION MANUAL
Level Tek II , Capacitance Level Switch 909GF295
Page 1
SECTION I - DESCRIPTION
1.1 GENERAL
The Robertshaw Model 5318B Level-Tek is a
RF capacitance point (On/Off) level switch that
employs all solid state electronics for detecting
predetermined product level changes in tanks,
sumps, silos and other vessels or containers.
The Model 5318B is capable of detecting a
variety of products, including liquids, powders,
granular, lump and flake materials. The
product can be conductive or non-conductive,
depending on the probe selection. Probes are
sold separately.
The Model 5318B is self-contained and uses
microprocessor based digital circuits to ensure
long-term stability, reliability and reduced
maintenance. Control signals are provided
through the contacts of a DPDT relay. The
instrument features adjustable time-delays that
are individually adjustable for the "Alarm" and
"Return-to-Normal" changes in state. There
are both fixed and adjustable differential
settings. The unit is available for either AC or
DC supply voltages.
The Model 5318B allows for three (3) different
control ranges: 250 pF, 500 pF and 1,000 pF.
Setup and calibration can be done in either the
raw measurement mode, or in the converted
mode. The converted mode uses a
measurement that is directly proportional to the
sensed capacitance. Calibration is
accomplished using an integral LCD display
and four (4) pushbuttons.
1.2 MODEL IDENTIFICATION
Identify instrument models in accordance with
the description and variations listed in each table
below. Dashes are used in the model number
only in those spaces as indicated in the example
below:
Key Model Number
Table 1 - Supply Power
Table 2 - Options
Table 3 - Enclosure
5318B B1 A
Key Model Number
Designation Description
5318B Capacitance actuated On-Off Level
Control. DPDT relay, fixed and
adjustable differential (dead-band)
and adjustable time delays.
Explosion-proof, weather tight
enclosure. Unit can be either
probe, or remote, mounted. Probe
not included.
Table 1 – Supply Power
Designation Description
A 18-36 VDC
*B 100-240 VAC, 50/60Hz
C 9-18 VDC
Table 2 - Options
Designation Description
*1 Standard
2
Special, Lower Measurement
Frequency (Consult Factory)
3
Custom Calibration (Consult
Factory)
Table 3 - Enclosure
Designation Description
*A ½” NPT Probe Hub, Type 4, Nitro
Blue
B
¾” NPT Probe Hub, Type 4, Nitro
Blue
D ½” NPT Probe Hub, Type 4X, Gray
Epoxy
E ¾” NPT Probe Hub, Type 4X, Gray
Epoxy
* Denotes standard configuration.