Robertshaw 158A Manual de usuario descargar pdf

GENERAL DESCRIPTION

The Robertshaw Model 158A capacitance to current

RF transmitter is designed for remote mounting from

the sensing probe and is used for continuous level

measurement and control. Housed in a weather-tight

or explosion-proof enclosure, with or without local

indication, the Model 158A may be mounted up to

150 feet from the sensing probe allowing convenient

and accessible installation.

A true DC current output signal, unaffected by varying

load resistance, is produced which is directly and

linearly proportional to input capacitance change. All

calibration adjustments for the system are within the

transmitter enclosure and are completely independent

and non-interacting resulting in a simple "one-shot"

calibration method. Wide adjustment ranges for both

zero and span are provided to insure satisfactory

operation on virtually any measurement application.

Unique circuit design concepts are employed in the

Model 158A to effectively "cancel-out" the

capacitance inherent in the Triaxial cable used to

couple the transmitter to the probe. This permits the

use of long lengths of interconnecting cable without

any degradation in performance of the system − and

without the need for compensating cables, padding

capacitors, or other calibration "tricks." Extensive use

of integrated circuit operational amplifiers and other

state-of-the-art semiconductors are used in the Model

158A to achieve reliability and long-term stability.

A wide variety of standard sensing probes for use with

the Model 158A are available from Robertshaw to

satisfy virtually any level measurement application.

Sales Manual Section 100

PRODUCT SPECIFICATION MODEL 158A

LEVEL-TEL

MODEL 158A

Probe, Cable and Conduit Outlet Box

shown for illustration only.

Must be ordered separately.

FEATURES AND BENEFITS

• CSA Certified (See Specifications)

• Independent and non-interacting adjustments-

Simple initial calibration

• Remote mounting capability-

Convenient installation location

• True Current Output Signals-

Insensitive to load variations

• All solid-state circuitry-

Long-term stability and reliability

1 2 3 4 5 6 7 8

Indice de contenidos

Pagina 1 - MODEL 158A

1 GENERAL DESCRIPTION The Robertshaw Model 158A capacitance to current RF transmitter is designed for remote mounting from the sensing pro

Pagina 2 - SPECIFICATIONS

2 PRINCIPLE OF OPERATION The Model 158A makes use of a unique circuit design concept developed by Robertshaw to provide a true DC current output sig

Pagina 3 - ORDERING INFORMATION

3 ORDERING INFORMATION * STANDARD MODEL 158A-B2-B1 OPTIONAL MODELS Select from Tables. (Allow additional delivery time.) 158A - B 2 - B 1 Key

Pagina 4

4 MOUNTING DIMENSIONS FOR 158A

Pagina 5

5 MOUNTING DIMENSIONS FOR 1

Pagina 6

6 MOUNTING DIMENSIONS FOR 1

Pagina 7

7 CUSTOMER CONNECTIONS TERM

Pagina 8 - Exports

8 Q-3867 (11/05)

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Robertshaw 158A Manual de usuario

Busca en linea o descarga Manual de usuario para De medición, control y control Robertshaw 158A. LEVEL-TEL MODEL 158A Manual de usuario

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