Instruction Manual

World Class 3000

Appendix B Rev. 2.2 January 1997

Table B-1. Specifications for Heater Power Supply

 

 

 

 

 

 

Environmental Classification

NEMA 4X (IP56) Optional - Class 1, Division 1,

 

 

 

Group B (IP56)

 

B

Electrical Classification

Category II

 

 

 

Humidity Range

95% Relative Humidity

 

 

Ambient Temperature Range

-20° to 140°F (-30° to 60°C)

 

 

 

 

Vibration

5 m/sec2, 10 to 500 xyz plane

 

 

Cabling Distance Between HPS 3000 and Probe

Maximum 150 feet (45 m)

 

 

Cabling Distance Between HPS 3000 and CRE 3000

Maximum 1200 feet (364 m)

 

 

Cabling Distance Between HPS 3000 and IFT 3000

Maximum 1200 feet (364 m)

 

 

Approximate Shipping Weight

12 pounds (5.4 kg)

 

 

 

 

 

 

 

 

 

 

B-2 THEORY OF OPERATION

The HPS 3000 Heater Power Supply may per- form slightly different functions, depending upon which electronics package it is used with. Figure B-3shows a functional block diagram of the unit. The HPS contains a transformer for con- verting line voltage to 44 volts needed to power the probe heater. The relay, Figure B-3,can be used to remotely turn the probe on or off manu- ally. A triac module is used to turn the heater on or off, depending on probe temperature.

When used with the CRE 3000 Control Room Electronics or IFT 3000 Intelligent Field Trans- mitter, the HPS uses a cold junction tempera- ture compensation feature. This allows for the

 

 

LINE

 

 

 

 

 

 

 

 

RELAY

 

 

 

TRIAC

FROM

 

 

 

AD590

 

 

 

 

IFT

 

 

 

PROBE TC

 

 

 

 

 

 

 

 

STACK TC

use of a less expensive cable between the HPS and CRE or HPS and IFT. The HPS and elec- tronics package can be located up to 1200 feet (364 m) apart.

The standard cable, between probe and HPS, is thermocouple compensated. This prevents the additional junctions between thermocouple and cable from producing a voltage which would af- fect the thermocouple output signal. A tem- perature sensor in the HPS monitors the temperature at the junction and sends a voltage signal to the CRE and IFT. The CRE and IFT uses this signal to compensate the probe ther- mocouple reading for the temperature at the junction between the compensated and uncom- pensated cables.

TO HEATER

TO

PROBE

PROBE TC

STACK TC

CELL MV

CELL

686015

Figure B-3. Heater Power Supply Block Diagram

Rosemount Analytical Inc. A Division of Emerson Process Management

Appendices B-3

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Emerson Process Management 3000 instruction manual Theory of Operation

3000 specifications

Emerson Process Management is a key player in the field of industrial automation, and one of its flagship offerings is the Emerson Process Management 3000. This system is designed to optimize production processes across a variety of industries, enhancing efficiency and ensuring robust operational performance.

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