Rosemount 8714D Manuel utilisateur

www.rosemount.com

Quick Installation Guide

00825-0100-4764, Rev BA

June 2004 Rosemount 8714D

¢00825-0100-4764W¤

Start

Step 1: Change Transmitter Parameters

Step 2: Connect the Rosemount 8714D

Step 3: Perform Electronics Trim

Step 4: Verify 8714D Calibration Standard

Magnetic Flowmeter Simulator

4764_revBA_QIG.fm Page 1 Tuesday, June 22, 2004 1:49 PM

Quick Installation Guide

00825-0100-4764, Rev BA

June 2004

Rosemount 8714D

Electronics Trim of an 8712D, 8732C, or 8742C

Magnetic Flowmeter Transmitter

The Rosemount 8714D is a high-precision instrument that supplies a 8712D, 8732C, or

8742C Magnetic Flowmeter Transmitter with a voltage corresponding exactly to 0.00 ft/s,

3.00 ft/s, 10.00 ft/s, and 30.00 ft/s. The precise 30.00 ft/s voltage signal may be used to

recalibrate or verify operation of the transmitter. (This same procedure is used by the factory

to calibrate the transmitter; it is rarely needed by customers.)

Perform this procedure only if you believe that transmitter is no longer accurate.

IMPORTANT NOTICE

This installation guide provides basic guidelines for the Rosemount®8714D. It does not

provide instructions for detailed configuration, diagnostics, maintenance, service,

troubleshooting. The manual and this QIG are also available electronically on

www.rosemount.com.

WARNING

Explosions could result in death or serious injury:

In an Explosion-proof/Flame-proof installation, do not remove the transmitter covers

when power is applied to the unit.

Electrical shock can result in death or serious injury

• Avoid contact with the leads and terminals. High voltage that may be present on leads

can cause electrical shock.

Rosemount Inc.

8200 Market Boulevard

Chanhassen, MN USA

55317

T (US) (800) 999-9307

T (Intnl) (952) 906-8888

F (952) 949-7001

Emerson Process Management

Flow

Groeneveldselaan 6-8

3903 AZ Veenendaal

The Netherlands

T 31 (0) 318 549 549

F 31 (0) 318 549 559

Emerson Process Management

Asia Pacific Private Limited

1 Pandan Crescent

Singapore 128461

T (65) 6777 8211

F (65) 6777 0947/65 6777 0743

4764_revBA_QIG.fm Page 2 Tuesday, June 22, 2004 1:49 PM

Quick Installation Guide

00825-0100-4764, Rev BA

June 2004 Rosemount 8714D

STEP 1: CHANGE TRANSMITTER PARAMETERS

1. Use the HART Communicator or Local Operator Interface (LOI) to change the

parameters of the transmitter to the following:

Tube Calibration Number: 1000015010000000

Units: ft/s

Analog Output Range: 20mA = 30.00 ft/s

Analog Output Zero: 4mA = 0 ft/s

Coil Pulse Mode: 6 Hz

2. Set the loop to manual (if necessary).

3. Power down the transmitter.

STEP 2: CONNECT WIRING AND POWER UP

1. Insert one end of the wiring assembly into the 8714D Calibration Standard; wire the

contact end of the wiring assembly to the transmitter. See Figures 1 and 2 on the

following page for detailed instructions regarding 8712D, 8732C, and 8742C.

Rosemount 8712D (Figure 1):

Use the six contact Pin terminal plug-style wiring assembly. Follow the numeric convention

for the 8712D so the plugs match the terminal block.

Rosemount 8732C/8742C (Figure 2):

Use the two black connector-style wiring assembly. (One connector has four contacts, the other

has three.) Remove the electronics side cover (furthest away from the conduit plugs). If you do not

have a LOI, the connectors will be clearly visible on the bottom side of the board.

If you have a LOI, remove the two mounting screws from the LOI assembly and pull the

display assembly away from the connector assembly until the connector assembly on the

back of the board is fully released. Then, plug the calibrator connectors into the appropriate

receptacles.

Figure 1. Rosemount 8712D Terminal Block

1 2

Coil 17 18 19

Electrode

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Quick Installation Guide

00825-0100-4764, Rev BA

June 2004

Rosemount 8714D

CAUTION

Attempting an electronics trim without a Rosemount 8714D may result in an inaccurate transmitter. It

may also generate a DIGITAL TRIM FAILURE message. If this message appears, no values were

changed in the transmitter. Simply power down the transmitter to clear the message. If the trim was

completed, or no error message was generated, correction requires a Rosemount 8714D.

STEP 3: PERFORM ELECTRONICS TRIM

1. Set the Rosemount 8714D to simulate a flow rate of 30 ft/s.

2. Power up the transmitter with the Rosemount 8714D connected. Allow the electronics 30

minutes to warm-up before reading the flow rate.

3. Read the flow rate. It should be between 29.97 and 30.03 ft/s. If the reading is within this

range, return the transmitter to the original configuration. If the reading is not within this

range, continue to step 8.

4. Initiate an electronics trim with the LOI or HART communicator. The electronics trim

takes about six minutes to complete. No transmitter adjustments are required.

STEP 4: VERIFY ROSEMOUNT 8714D CALIBRATION STANDARD

Guidelines for Checking Series

8714D Magnetic Flowmeter Calibration Standard

The Rosemount 8714D Magnetic Flowmeter Calibration Standard operates in conjunction

with 8712D, 8732C, or 8742C Magnetic Flowmeter Transmitters. This device simulates a

flowtube coil load. It accurately produces a simulated flow signal for the purpose of

transmitter calibration.

Required Equipment

• Current source (output and accuracy: 500mA ±5mA)

• Precision Resistor: measured to 5 significant digits, less than 10 ppm, and > 1 watt

• Nanovoltmeter (Agilent 34420A or equivalent)

Figure 2. Rosemount 8732C/8742C Terminal Block

HART Fast Keys 1, 5

LOI Auxiliary Function

Coil

Connection

(Four-position

connector)

Electrode

Connection

(Three-position

connector)

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Quick Installation Guide

00825-0100-4764, Rev BA

June 2004 Rosemount 8714D

Limitations

• Current through terminals 1 and 2 shall not exceed 600mA (peak)

• Current through terminals 18 and 19 shall not exceed 5mA.

• Calibration shall occur with the standard set at 30 feet per second.

Procedure

1. Set-up your equipment according to Figure 3.

2. Power up the system.

3. Allow the Rosemount 8714D to warm-up for 30 minutes.

4. Set the input current to terminals 1 and 2 at 500mA.

5. Measure and record the average voltage from terminals 18 and 19 over a five minute

period.

6. Measure and record the average voltage across the 1 ohm resistor.

7. Calculate current with V=IR where R is the resistor value.

8. Divide result from step 5 by step 7 result.

9. Power down the system.

10.Switch the connections 1 and 2 at the Rosemount 8714D calibration standard.

11. Set the input current to terminals 1 and 2 at 500 mA.

12.Measure and record the average voltage from terminals 18 and 19 over a five minute

period.

13.Measure and record the average voltage across the 1 ohm resistor.

14.Calculate current with V=IR where R is the resistor value.

15.Divide result from step 12 by step 14 result.

16.Add the absolute value steps 8 and 15 and divide by two. The value should be within

0.05% (0.00108 mV/Amp) of 2.156mV/Amp.

17.If your device does not operate in conjunction with this specification, return the

Rosemount 8714D to the Rosemount Inc. factory for adjustment.

Figure 3. Set-up Rosemount 8714D and the transmitter as shown

Within the United States, Rosemount Inc. has two toll-free assistance numbers.

Customer Central: 1-800-999-9307

(7:00 a.m. to 7:00 p.m. CST)

Technical support, quoting, and order-related questions.

North American Response Center: 1-800-654-7768

(24 hours a day - Includes Canada) Equipment service needs.

Current

Source

Rosemount

8714D

Voltmeter

1 Ohm

Resistor

Current

Source

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Quick Installation Guide

00825-0100-4764, Rev BA

June 2004

Rosemount 8714D

4764_revBA_QIG.fm Page 6 Tuesday, June 22, 2004 1:49 PM

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