World Class 3000

Instruction Bulletin

Appendix B Rev. 2.3 May 2005

Table B-1. Specifications for Heater Power Supply

Environmental Classification

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

 

Group B (IP56)

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-3 shows 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

 

 

 

CELL MV

 

 

 

 

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

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 3000 instruction manual Table B-1. Specifications for Heater Power Supply, Theory of Operation
Page 128 Page 130

3000 specifications

The Emerson 3000 is a cutting-edge control system designed to enhance the efficiency, reliability, and precision of industrial operations. Employed across various sectors such as oil and gas, pharmaceutical, food and beverage, and power generation, the Emerson 3000 has gained recognition for its robustness and versatility.

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In summary, the Emerson 3000 represents a fusion of advanced process control, modular design, IoT connectivity, robust cybersecurity, and user-centric interface, making it an ideal choice for industries seeking to enhance their operational performance while adapting to ever-evolving technological landscapes.
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