Mercoid 3100 Operating Manual

Bulletin P-3100

Series 3100 Explosion-Proof Differential Pressure Transmitter

Specifications - Installation and Operating Instructions

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyermail.com

Phone: 219/879-8000 www.dwyer-inst.com

Table of Contents

Chapter 1. Introduction

1.1 Using This Manual

1.2 Overview of Transmitter

1.3 Software Compatibility

Chapter 2. Handling Cautions

2.1 Unpacking Transmitters and Specifications Check

2.2 Models and Specifications Check

2.3 Storage .4 Selecting Installation Locations

2.5 Calibration after Installation

2.6 Pressure Connections

2.7 Waterproofing Cable Conduit Connections

2.8 Restrictions on Use of Radio Transceiver

2.9 Installation Resistance Test and Dielectric Strength Test

2.10 Explosion-Proof Transmitters

2.11 EMC Conformity Standards

Chapter 3. Transmitter Functions

3.1 Overview

3.2 Safety Messages

3.3 Warning

3.4 Fail Mode Alarm

3.5 EEProm-Write Enable/Disable Mode Jumper

3.6 Configuration of Alarm and Security Jumper Procedures

3.7 Configuration of Zero and Span Procedures

3.8 Commissioning on the Bench with HHT

Chapter 4. Installation

4.1 Overview

4.2 Safety Messages

4.3 Warning

4.4 Commissioning on the Bench with Hand-Held Terminal

4.5 General Considerations

4.6 Electrical Considerations (Power Supply)

4.7 Wiring

4.8 Mechanical Considerations

4.9 Environmental Considerations

Chapter 5. On-line Operation

5.1 Overview

5.2 Safety Messages

5.3 Configuration Data Review

5.4 Configuration Verification

5.5 Basic Setup

5.6 Detailed Setup

5.7 Configuration Variables Setup

5.8 Diagnostics and Services

5.9 Calibration

Chapter 6. Maintenance

6.1 Overview

6.2 Safety Messages

6.3 Hardware Diagnostics

6.4 Hardware Maintenance

Appendix I

3100 Smart Pressure Transmitter LCD Display Code

HART

is a registered Trademark of Hart Communication Foundation

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Chapter 1 Introduction

The 3100 Smart Pressure Transmitter is calibrated at the factory before shipping. To ensure correct and efficient use of the instrument, please read the manual thoroughly and fully understand how to operate the instrument before operation.

1. The contents of this manual are subject to change without prior notice.

2. All rights are reserved. No part of this manual may be reproduced in any form without Dwyer Instruments, Inc. written permission.

3. If any question arises, errors are found or if any information is

issing from this manual, please inform Dwyer Instruments, Inc.

4. The specifications covered by this manual are limited to standard transmitters and do not cover custom-made instrument.

5. Please note that changes in the specifications, construction, or component parts of the instrument may not immediately be reflected in this manual at the time of change, provided that postponement of revisions will not cause difficulty to the user from a functional or performance standpoint.

1.1 Using This Manual

The operating manual provides information on installing, operating, and maintaining the Mercoid

Model 3100 Smart Pressure

Transmitter. The Chapters are organized as follows.

Chapter 2 Handling Cautions

Chapter 2 provides instructions on commissioning and operating the Model 3100 Smart Pressure Transmitters. Informations on software functions, configuration parameters, and on-line variables are also included.

Chapter 3 Transmitter Functions

Chapter 3 contains suggestions on handling the Model 3100 Smart Pressure Transmitter.

Chapter 4 Installation

Chapter 4 contains mechanical, environment consideration and electrical installation instructions for the Model 3100 Smart Pressure Transmitter.

Chapter 5 On-line Operation

Chapter 5 describes how to configure the parameters of the Model 3100 Smart Pressure Transmitter. See the following list for the details.

1. Regulations for circuit's Input/Output characteristics; Sensor

or Output Trim

2. Changing the output characteristic; Range Configuration,

Output Type, Dampening, Unit

3. Changing the general data; Tag No., Date, Message etc.

Chapter 6 Maintenance

Chapter 6 contains hardware diagnostics, troubleshooting and maintenance task.

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1.2 Overview of Transmitter

The Mercoid based pressure transmitter with a capacitance sensor optimized for draft measurement. The Model 3100 has a true draft analog range from 0 to 20 mA. This transmitter is explosion-proof, high precision accuracy, reliability and has digital communication for remote communication system. The Model 3100 is enabled with HART HHT (HART various variables in host are able to be changed, configured and calibrated by users. The HART

upply and transmitter requires a 250~ 550 Ohm resistance.

Smart Pressure Transmitter is a microprocessor

Communicator) or PC Configurator. The transmitter’s

Communication between DC power

communication with Host,

1.3 Software Compatibility

The Mercoid at the factory. The following functions can be configured using a HHT (Hart

Function

ZERO/SPAN ZERO TRIM ZERO Adj Units set Range set Dampening set LCD decimal set

Smart Pressure Transmitter's software is implemented

Communicator).

Function Supports ZERO/SPAN Button Rev.58

•

PC/PDA

•

HART HHT

•

∆

• : Supported

∆ : Supported but update required

HART®is a registered Trademark of HART Communication Foundation

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Chapter 2 Handling Cautions

This chapter consists of cautions for transmitter handling, storage, installation, insulation and explosion structure, etc.

Step

Job

Unpacking

Model and Specifications

Storage

Calibration

Installation

ocations

Mechanical Considerations

Electrical Considerations

Mounting and Installation

Calibration on Spot

Pressure

Operation

Job Details

- Unpack transmitter packing Make sure the transmitter nameplate matches the model number

on the P.O.

- In a dry, non-vibration and non-impact area

- Ambient temperature around 77°F (25°C) and 65% relative humidity

- Configuration of the Range, Zero/Span, Unit, Tag, Dampening Time, Transfer Function, DA Trim and other parameters

- Where ambient temperature are constant

- Exposure to chemical corrosion, etc.

- Where shock and vibration are minimal

- Where the area classification does not exceed the explosion-proof rating

- Where maintenance is easy

- Where the transmitter can be handled easily

- Be cautious of process connections leaking

- 24 VDC (Power Supply is 11.9 Vdc – 45 Vdc)

- For HART

communication, resistance on transmitter terminal loop

should be between 250 – 550 Ohms

- When mounting the transmitter, an appropriate bracket should be used

- The transmitter should be mounted securely to prevent swing

- Sensor Zero Trim should be done ten seconds after differential pressure stabilizes

- Make sure that PV value is zero and current is 4 mA

- Do not apply a regulated differential pressure and line pressure

- Close the equalizing valve on the 3 valve manifold and then open the valve on high and low side slowly and simultaneously

- Make sure the transmitter operates properly

Instrument

HHT

- Pressure Source

- Galvanometer (Engineering)

(Engineering)

(Mounting and Installation)

HHT or Zero/Span button

(Applying pressure)

Eye or HHT

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2.1 Unpacking Transmitters

When moving the transmitter to the installation site, keep it in the original packaging. Unpack the transmitter at the installation site to avoid damage on the way.

2.2 Model and Specifications Check

The model number and specifications are indicated on the nameplate. Please check the specification and model number.

2.3 Storage

The following precautions must be observed when storing the

nstrument, especially for a long period of time.

1. Select a storage area that meets the following conditions:

- is not exposed to rain or water.

- minimal vibration and shock.

- stored at normal temperature and humidity (approx. 77°F (25°C), 65% RH).

The ambient temperature and relative humidity ratings are:

Ambient Temperature: -40 to 185°F (-40 to 85°C)

(without LCD module)

-22 to 176°F (-30 to 80°C)

(with LCD module) General Use: -4 to 140°F (-20 to 60°C) Relative Humidity: 5% ~ 98% RH at 104°F (40°C)

2. When storing the transmitter, repack it the way it was delivered from the factory.

3. If storing a used transmitter, thoroughly clean the diaphragm surfaces, so that no media remains. Make sure the transmitter assemblies are securely mounted before storing.

2.4 Selecting Installation Locations

The transmitter is designed to withstand severe environmental conditions. However, to ensure stable and accurate operation, the following precautions must be observed when selecting an installation location.

1. Ambient Temperature Avoid locations subject to wide temperature variations or a significant temperature gradient. If the location is exposed to radiant heat from plant equipment, provide adequate insulation or ventilation.

2.5 Calibration after Installation

1. Sensor Zero Trim should be done after transmitter is installed, because the zero point is not configured for mounting status.

2. When calibrating the Sensor Zero Trim apply a pressure for zero in advance, Sensor Zero Trim the sensor when the pressure is sufficiently stabilized (after approximately 10 seconds).

3. There are two ways to pressure zero. One way is to apply zero differential pressure (making pressure the same on both the high and low side). The other is to close High and Low side of a 3 valve manifold and open the equalizing valve.

4. Sensor Zero Trimming can also be done with the Zero/Span

utton or a HHT (HART

ommunicator), PC or PDA

configurator.

5. Refer to On-line Operation for configuring other parameters.

2.6 Pressure Connections

CAUTION

rocess fluid. If the process fluid is toxic or otherwise harmful, take appropriate care

p to avoid contact or inhalation of vapors even after disconnecting the instrument from process line for maintenance.

Instrument installed in the process under pressure.

ever loosen or tighten as it may cause dangerous spouting of

The following precautions must be observed in order to safely operate the transmitter under pressure.

1. Never apply a pressure higher than the specified maximum

working pressure.

2. Confirm the option pressure of transmitter. It is necessary to

use standardized and quality-approved parts.

3. There should be isolation valves in case of leakage.

2.7 Waterproofing Cable Conduit Connections

Apply a non-hardening sealant (silicone or tape, etc.) to the threads to waterproof the transmitter cable conduit connections.

2.8 Restrictions on Use of Radio Transceivers

WARNING

transmitters external wiring, the transmitter may be affected by high frequency noise pickup. To test for such effects, bring the transceiver in slowly from a distance of several feet from the transmitter, and observe the measurement loop for noise affects. Always use the transceiver outside the area affected by noise.

Although the transmitter has been designed to resist high frequency electrical noise, if a radio transceiver is used near the

2.9 Installation Resistance Test and Dielectric Strength Test

Since the transmitter has undergone insulation resistance and dielectric strength tests at the factory, normally these tests are not required. However, if required, observe the following precautions in the test procedures.

2. Ambient Atmosphere Avoid installing the transmitter in a corrosive atmosphere. If the transmitter must be installed in a corrosive atmosphere, there must be adequate ventilation. Precautions must be put into place to prevent intrusion or stagnation of rainwater in conduits.

3. Shock and Vibration Select an installation site with minimum shock and vibration (although the transmitter is designed to be relatively resistant to shock and vibration).

4. Installation of Explosion-Proof Transmitters Explosion-Proof transmitters can be installed in hazardous areas according to the gas types for which they are certified.

5. Select a place where the transmitter can be maintenanced easily.

1. Do not perform such tests more frequently than necessary. Even test voltages, that do not cause visible damage to the insulation, may degrade the insulation and reduce safety margins.

2. Never apply a voltage exceeding 500VDC for the insulation resistance test, or a voltage exceeding 500VAC for the dielectric strength test.

3. Before conducting these tests, disconnect all signal lines from the transmitter terminals. Perform the tests in the following procedures.

Insulation Resistance test

1. Short-circuit the + and - SUPPLY terminals in the terminal box.

2. Turn OFF the insulation tester. Then connect the

insulation tester plus (+) lead-wire to the shorted SUPPLY terminals and the minus (-) lead wire to the grounding terminal.

3. Turn ON the insulation tester power and measure the insulation resistance. The voltage should be applied briefly to verify that insulation resistance is at least 20MΩ.

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