Dwyer Instruments 3100MP-1-FM-1-1-LCD, 3100MP-2-FM-1-1-LCD, 3100MP-1-FM-1-1, 3100MP-7-FM-1-1-LCD, 3100MP-4-FM-1-1-LCD User manual

Bulletin P-3100

Series 3100 Explosion-Proof Differential Pressure Transmitter

Specifications - Installation and Operating Instructions

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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

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.

m

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
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.

®

Model 3100 Smart Pressure

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.

s

®

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

1

Unpacking

2

Model and
Specifications

3

Storage

4

Calibration

5

Installation

ocations

L

6

Mechanical
Considerations

7

Electrical
Considerations

8

Mounting and
Installation

9

Calibration on Spot

10

Pressure

11

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
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

®

communication, resistance on transmitter terminal loop

Instrument

HHT

-

- Pressure Source

- Galvanometer
(Engineering)

(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.

i

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

b

®

ommunicator), PC or PDA 

C

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

N

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.

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. 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).

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

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.

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

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

3. Turn ON the insulation tester power and measure the

terminal.

insulation resistance. The voltage should be applied briefly
to verify that insulation resistance is at least 20MΩ.

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4. After completing the test and being very careful not to touch
exposed conductors. Disconnect the insulation tester and connect
a 100kW resistor between the grounding terminal and the short­circuiting SUPPLY terminals. Leave this resistor connected at
least three seconds to discharge any static potential. Do not touch
the terminal while it is discharging.

Dielectric Strength Test

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

2. Turn off the dielectric strength tester. Then connect the tester
between the shorted SUPPLY terminal and the grounding

erminal. Be sure to connect the grounding lead of the dielectric

t
strength tester to the ground terminal.

3. Set the current limit on the dielectric strength tester to 10 mA, then
turn on the power and gradually increase the tester voltage from
'0' to the specified voltage.

4. When the specified voltage is reached, hold it for one minute.

5. After completing this test, slowly decrease the voltage to
avoid any voltage surges.

2.10 Explosion-Proof Rating

2-10-1. FM Certification

HAZARDOUS LOCATION ELECTRICAL EQUIPMENT
Equipment Rating: Explosion-Proof for use in Class I, Division 1,
Groups A, B, C and D;
Dust- Ignition-Proof for Class II/III, Division 1, Groups E, F and G;
Nonincensive for use in Class I, Division 2, Groups A, B, C and D;
Suitable for use in Class II, Division 2, Groups E, F and G;
and Suitable for Class III, Division 1;
Hazardous (classified) location, indoor and outdoor
(NEMA Type 4X/IP67).

2.10.2 DEKRA/ATEX Certification

ATEX Certification number : DEKRA 11ATEX0192X
CE 0344 II 2 G

B. External Ground Assembly:

This is located in the right side of housing and identified as
ground sign. (Grounding with a cable lug)

2. When use tubing, stopping boxes must be connected with the wall
of housing directly.

3. Tubing is installed a minimum of 5 threads.

4. Sensor is to be threaded a minimum of 7 threads and prevented
from turing by tightening the housing rotation set screw.

5. Do not disassemble flameproof Joints but in an unavoidable case
to disassemble it or need the specification of flameproof Joints,
contact the manufacturer before doing.

OTICE

N

ARNING

W

Operation

O NOT OPEN WHEN AN EXPLOSIVE

D
ATMOSPHERE MAY BE PRESENT.

1. Take care not to generate mechanical spark when access to the
instrument and peripheral devices in hazardous location.

NOTICE

uthorized representative of Dwyer/Mercoid is prohobited and will void KEMA/ATEX

a
explosion-proof/flame-proof.

aintenance and Repair

M

he instrument modification or parts replacement by other than

T

2.11 EMC Conformity Standards

EMI (Emission): EN55011
EMS (Immunity): EN50082-2

Dwyer Instruments, Inc. recommends customer use metal conduit
wiring or twisted pair shield cable for signal wiring to conform with
EMC regulation, when installing the Mercoid

®

3100 transmitters.

Chapter 3 Transmitter Functions

3.1 Overview

This Chapter contains information on operating the Model 3100.
Tasks that should be performed on the bench prior to installation are
explained in this chapter.

NOTICE

Model 3100 for potentially explosive
atmosphere

1. Ex d IIC T6...T4

2. Operating Temperature : -20°C ≤ T

amb

≤ +60°C

3. T6 for process ≤ 85°C;

4. T5 for process ≤ 100°C;

5. T4 for process ≤ 130°C;

NOTICE

Electrical Data

1. Supply Voltage : 42 Vdc Max

2. Output Signal : 4 to 20 mA + HART

NOTICE

NOTICE

Electrical Connection : 2 x 1/2-14 NPT Female

3100 ATEX Certification is according to the
below standards

EN 60079-0 : 2006
EN 60079-1 : 2007

NOTICE

Installation

1. All wiring shall comply with local installation requirement.

2. The cable glands and blanking elements shall be of a certified
flameproof type, suitable for the condition of use and correctly
installed. Also those devices should be endured at the 130°C.

3. Housing Ground must be followed to “local electrical codes”. The
most efficient ground procedure is to connect directly to the earth
as least impedance.

1. How to Housing Ground:

A. Internal Ground Connection:

Internal ground connection screw is located in terminal in
housing; the screw can be identified as ground sign.

3.2 Safety Messages

Procedures and instructions in this chapter may require special
precautions to ensure the safety of the personnel performing the
operations. Potential safety issues are indicated by a warning
symbol ( ). Refer to the following safety messages before
performing an operation preceded by this symbol.

3.3 Warning

DANGER

when the circuit is powered. Transmitter covers must be fully engaged to meet
explosion-proof requirements.

WARNING

3.4 Fail Mode Alarm

Mercoid

Explosion can result in death or serious injury:

Do not remove the transmitter covers in explosion environments

Electrical shock can result in serious injury:

Only qualified personnel can install the transmitter.

®

Smart Pressure Transmitter automatically and
continuously performs self-diagnostic test. If the self-diagnostic test
detects a failure, the transmitter drives the output outside of the
normal operation values. The transmitter will drive its output low
(down) or high (up) based on the position of the failure mode alarm
jumper. See Table 3.1 for output values.

Level

Low/Down
High/Up

4~20 mA Saturation

3.9 mA

20.8 mA

4~20 mA Alarm

≤ 3.75 mA
≥ 21.75 mA

[Table 3.1 Standard Alarm and Saturation Values]

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WARNING

ay be present, on leads can cause electrical shock.

m

lectrical shock can result in serious injury:

E

void contact with the leads and terminals. High voltage, that

A

Fail Safe mode can be set via Jumper switches provided on the LCD
module or the main CPU module. The jumper switch for an
indicating transmitter, located on the LCD module, can be set to the
right (fail down i.e. ≤ 3.75 mA) or left (fail up i.e. ≥ 21.75 mA). For
non-indicating transmitters the jumper switch is located on the main
CPU module, it can be set up (fail up to ≥ 21.75 mA) or down (fail
down to ≤ 3.75 mA). Refer to Figure 3-1 for detailed summary of

umper settings for both CPU and LCD modules.

j

Only CPU
Module

CPU Module
D

U

Select Fail

ode

M

Fail Down

Fail Up

Both LCD Module and
CPU Module

CPU Module
Down
Down
Up

LCD Module
D
U
U or D

UP 

DOWN

3-5 EEProm-Write Enable / Disable Mode Switch

EEPROM (Electrically Erasable Programmable ROM), included on
the CPU module, is used by the transmitter to save/restore
configuration variables. To protect the transmitter from any
unauthorized changes, a hardware lockout feature can be
implemented by using the Write-Protect mode jumper switch
provided on the main CPU Module. If the jumper switch is connected
to DIS, this disables writing/changing of any data saved in the
EEPROM. On the other hand, if the jumper switch is set to “EN”,
changes can be made to the configuration data stored in the
EEPROM. The factory default setting is “EN” (Enable) for all

ransmitters. The location of the Wire Protect Jumper Switch can be

t
seen in Figure 3-3.

Figure 3-3. CPU Module Fail Mode, EEPROM-Write Selection Jumper Switch

Fail Safe Mode Selection (LCD & CPU Module)

1. WR_EN (EEPROM Write Enable)
DOWN : ENABLE
UP : DISABLE

2. Fail Mode(Alarm)
DOWN : LOW
UP : HIGH

Fail Mode for LCD Module Selection Jumper Switch

U O O O O O O D   O O O  D

(If Down)

Figure 3-1. Fail Mode and EEPROM-Write Selection Jumper Switch

FAIL MODE

(If Up)

The 3100 has two security settings.

1. Security Jumper: the transmitter configuration parameters are
protected.

2. Physically removing Zero and Span Magnetic Buttons: you are
unable to regulate zero and span locally.

3.5.1 Security Jumper (EEPROM Write Protect)

Prevents the transmitter’s configured parameters from being
changed.

3.5.2 Zero and Span Buttons

By removing the Magnetic Buttons, you can’t configure the
transmitter using the Zero and Span locally.

3.6 Configuration of Alarm and Security Jumper Procedures

Changing jumper position.

1. If the transmitter is installed, cutoff power.

2. Open the front cover. If the transmitter is powered, don’t

open the cover.

3. Move the jumper to the preferred position.

4. Close the front housing covers. You must fully engage the

cover to meet explosion-proof requirements.

Figure 3-2 Fail Mode Selection Jumper Switch for LCD Module

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3.7 Configuration of Zero and Span Procedures

The ZERO and SPAN Buttons are under the transmitter ’s
nameplate. The ZERO, SPAN, ZERO TRIM, ZERO ADJ, Units,
Range, Dampening, LCD and decimal set functions are configurable
using the ZERO / SPAN buttons.

Zero/Span Configuration Process

Remove both name plate screws on the upper part of transmitter.
Remove top name plate to access the Zero and Span Buttons.
(following Figure 3-4)

1. Zero Configurations
et the current process value for Lower Range Value (4 mA).

S
Apply zero pressure for 10 seconds and push the Zero Button
for 5 seconds. The LCD should display “Zero”. Push the Zero
button for 3 seconds, after 1 second the LCD should display
“-ZE-”. This message means the zero configuration is
finished. If the zero configuration failed, the LCD will display
“SPEr” or “SEtE”, try repeating the zero configuration steps.

2. Span Configurations

Apply the desired pressure for 10 seconds and push the Span
Button for 5 seconds. The LCD should display “Span”. Push
the Span button for 3 seconds, after 1 second the LCD should
display “-SP-”. This message means that the span
configuration is finished. If the span configuration failed the
LCD will display “SPEr” or “SEtE”, try repeating the span
configuration steps.

CAUTION

0 seconds without any action, the button function will return to

3

ormal operation.

n

4. How to select a numerical value
A. Functions use numerical values: 12 Zero Adjustment, 22

Change Upper Range Value, 23 Change Lower Range Value,
24 Dampening Second

B. How to select numerical value: First, select an increasing rate

n

(10

), then change each decimal value to increase or
decrease as wanted. For example, select 3810 : Select
increasing rate 1000 -> Increase 3 times -> Select

ncreasing rate 100 -> Increase 8 times -> Select

i
increasing rate as 10 -> Increase 1 time

C. To select the increase / decrease steps: SelInc message will

be displayed on the bottom of the LCD. Select parameter and
press the Zero button : The decimal value will be changed
when the Zero button is pressed. After set, press the span
button to execute the parameter.

D. To set the required values using Zero/Span buttons: VALUE

message will be displayed on the bottom of the LCD.

1. Press the Zero button, the menu will increase 1 item.

2. Press the Span button, the menu will decrease 1 item.

3. After setting, save the parameter by pressing the
Zero+Span buttons.

E. To set the final value, repeat C and D.
F. After setting the final parameter, exit the menu by pressing the

Zero+Span buttons.

• Please refer to Appendix 1 for the button error and LCD display
message.
The other functions supported by the ZERO / SPAN Buttons are
below.

[Menu Tree for Zero+Span Button Function]

1. Moving between menus: Zero

2. Enter or moving to sub menu: Span

3. Moving to top menu: Zero+Span

• Press the button for 3 seconds to execute each function. After

3 seconds press the Zero+Span buttons, the LCD display
will change from Menu to Trim. To see the next menu, press
the Zero button for 3 seconds. Use the Zero button to move
down the directory.

• Use the Span button to select the displayed menu. The same

procedure will be used for the sub menus.

5. Exercises for each function

• ZERO TRIM

1. Access the menu by pressing the Zero+Span buttons.

2. Move to the sub directory using the Span button until the
1 TRIM message appears on the display.

3. Change the Zero Trim Function by using the Span button

until the 11 Z-TRIM message appears on the display.

• ZERO ADJUSTMENT : Change the PV value to 14

1. Exit the menu by pressing the Zero+Span button.

2. Moving thru the sub directory using the Span button

until 1 TRIM message appears.

3. Moving thru the sub directory using the Zero button

until 11 Z-TRIM message appears.

4. Access the Zero Adjustment function by pressing the
Span button until the 12 Z-ADJ messages appears.

5. When the SelInc message appears, press the Zero button

repetitively until the 10.0 message appears on the LCD.
Set the value by pressing the Span button.

6. When VALUE message appears, change the LCD value

to 10.0 and press the Zero button, then press the
Zero+Span buttons.

7. When Sellnc message appears, change the LCD value to

1.0 and press the Zero button, then set the value and
press the Span button. Press the Zero+Span buttons after
the LCD value changes to 14.0.

8. To save the settings, press the Zero+Span buttons until

the SelInc message appears.

• CHANGE UNITS

1. Access the menu by pressing the Zero+Span buttons.

2. Moving to next menu by pressing the Zero button until the

1 TRIM message appears.

3. Moving thru the sub directory press the Span button until

the 2 SETUP message appears.

4. Press the Span button to access 21 UNIT, press Span

again to access Change Unit.

5. Save the values by pressing the Span button when the

desired value is displayed on the LCD.

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• CHANGE UPPER RANGE VALUE

1. Access the menu by pressing the Zero+Span buttons.

2. Move to the next menu by pressing the Zero button until
the 1 TRIM message appears.

3. Press the Span button until the 2 SETUP message appears.

4. Press the Span button until the 21 Unit message appears.

5. Press the Zero button until the 22 U-RNG message appears.

6. Press the Span button until the Zero Adjustment
message appears.

• CHANGE LOWER RANGE VALUE

1. Access the menu by pressing the Zero+Span buttons.

. Move the to next menu by pressing the Zero button until

2

the 1 TRIM message appears.

3. Press the Span button until the 2 SETUP message appears.

4. Press the Span button until the 21 Unit message appears.

5. Press the Zero button until the 22 U-RNG message appears.

6. Press the Zero button until the 23 L-RNG message appears.

7. Press the Span button until the Change Lower Range

Value message appears.

• CHANGE LCD MODE (Cyclic or Fixed Display)

1. Enter programming menu by pushing both (ZERO+SPAN)
button together for 5 seconds. Release buttons when LCD
displays Menu and display will automatically change to “1
TRIM” confirming access into programming menu.

2. Push (ZERO) button when “1 TRIM” message appears on

LCD. Release button when display changes to “2 SETUP”.

3. Push (Zero) button and release when display changes to

“3 LCD”.

4. To move into sub directory push (Span) button after “3 LCD”

message appears on display. Release button when 31 LCD­MD message is displayed.

5. To enter this sub-menu, push (Span) button and release

when display changes to 311. Bottom line of display will

show current Mode setting e.g. NOR-RO, NOR-PVetc.

6. Push (Zero) button to cycle through available mode options
and select desired LCD rotation mode. Options are:

NOR-RO (rotate all PV, %, mA), NOR-PV (fixed PV),
NOR-% (fixed %), NOR-mA fixed,
ENG-RO, ENG-PV, ENG-% or ENG-mA

7. Push (Span) to save changes and EXIT programming mode.

• DECIMAL PLACE

1. Access the menu by pressing the Zero+Span buttons.

2. Move to the next menu by pressing the Zero button until
the 1 TRIM message appears.

3. Press the Span button until the 2 SETUP message appears.

4. Press the Span button until the 3 LCD message appears.

5. Press the Span button until the 31 DEC-PL message

appears.

6. Press the Span button until the Decimal Place

message appears, the decimal place will appear on the
second line of the LCD as follows.

Display

AUTO

Explanation

Target value will be displayed

automatically
5-0
4-1
3-2
2-3
1-4

No decimal place

Display one decimal place

Display two decimal places

Display three decimal places

Display four decimal places

Max. Value

99999

99999

9999.9

999.99

99.999

9.9999

igure 3-4 Transmitter Zero/Span Configuration Buttons

F

3.8 Commissioning on the Bench with HHT

The 3100 Pressure Transmitter can be commissioned using an HHT
before or after installation.

Connect an HHT (HART

the COMM pins for HART

®

HANDHELD Communicator) across

®

communication. The TEST pin
connections can be used for connecting a multimeter to measure the
output current directly from the transmitter. Since the 3100 is a two
wire loop powered transmitter, it requires an external loop power
supply (11.9V to 45VDC) to enable HART

®

HART

communication via HHT (or PC based configurator) requires

®

communication. Any

a minimum 250 ~ 550 (max) ohm loop resistance.

[Figure 3-5 Connecting the Transmitter to HHT]

7. The first line on the LCD will display 0.0.

8. The Decimal Place can be changed by pressing the Zero
button. Save the setting by pressing the Span button
after the decimal place has been selected.

9. The set value will display the PV value and
Engineering value.

10. The LCD will display LCD_OV and the saved Unit when
the pressure is over or under a set value.

Page 9

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Chapter 4 Installation

Do you want

Basic Setup

a

) Unit Setup

b) Range Setup

c

) Dampening Setup

d

) Transmitter Function Setup

S

tart

V

erify

a

) Pressure Support

Y

es

End

Field Install

a

) Jumper/Switch Setup

b) Transmitter takes up

c

) Transmitter leads

d) Transmitter for Power Supply

D

o you satisfy spec?

M

aintenance

No

4.1 Overview

The information in Chapter 4 explains installation.

4.2 Safety Messages

Procedures and instructions in this chapter may require special
safety measures to ensure the safety of the personnel performing
the operation. Potential installation safety issues are indicated by a
safety alert symbol ( ). Refer to the following safety messages
before installing the 3100 pressure transmitter.

.3 Warning

4

DANGER

the circuit is powered. Both transmitter covers must be fully engaged to meet the

xplosion-proof requirements.

e

ARNING

W

Explosion can result in death or serious injury: Do not remove
the transmitter covers in an explosion-proof environment when

lectrical shock can result in serious injury: Only qualified

E

ersonnel can wire the pressure transmitter.

p

WARNING

rocess leaks.

p

ANGER

D

Process leaks can cause death or serious injury: Install and
tighten before applying pressure. If you don’t, it can cause

lectrical shock can result in death or serious injury:

E

void contact with the leads and terminals.

A

4.4 Commissioning on the Bench with Hand-Held Terminal

The 3100 Pressure Transmitter can be commissioned before and
after installation. Commissioning is easier if the transmitter is
configured on a bench with an HHT before installation.

4.5 General Considerations

The transmitter can be mounted near the process to minimize piping.
Keep in mind that easy access is required for personnel, field
calibration, and installation. Install the transmitter in an area with
minimal vibration, shock, and temperature fluctuations.

4.6 Electrical Considerations (Power Supply)

The transmitter housing is composed of two parts. One side is
electronics, and the other side is terminal block. The terminal block
side is the transmitter’s front side and is labeled “Field Terminal” on
the housing. The terminal block can be accessed by removing the
front cover. When wiring the power supply to the transmitter make
sure the positive and negative wires are connected correctly.
A HHT configurator can be connected directly across the (COMM)
pin terminal located just below the power supply (PWR) terminal
block connections.

[Figure 4-1 Installation Flow Chart]

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4.6.1 Power Supply

C

OMM TESTCOMM TEST

COMM TESTCOMM TEST

The 3100 Pressure Transmitter requires an 11.9 – 45 VDC power
supply. A 250 ~ 550Ω (24 VDC) loop resistance is recommended
for HART

®

communication. Loop resistance is the sum of the

resistance in the loop.

Max. Loop Resistance [Ω] = (E-11.9) [vdc] / 0.022 [mA]

4.7 Wiring

4.7.1 Wiring Caution

1. Install the signal cables away from potential sources of
lectrical noise such as transformers, electrical motors, etc.

e

2. Before wiring, remove electrical conduit cap.

3. All screwed connections on the housing must be sealed with

waterproof sealant. We recommend use of silicone based
sealants to minimize post-hardening.

4. Avoid running DC signal and AC power cables in the same

ducts/cable conduits to avoid signal noise issues.

5. All explosion-proof transmitters must meet the wiring & 

installation requirements specified within the applicable
electrical codes.

4.7.2 Selecting the Wiring Materials

1. Use 600V shielded PVC wire or standard wire

of the same class. (To ensure proper communication use 24
AWG or larger wire, and do not exceed 5000 feet)

2. Use shielded wire in areas with electrical noise.

3. In areas with high or low ambient temperatures, use wire or

cable that is rated for the extreme temperatures.

4. If the wire or cable is going to be used in oil, solvent, toxic

gas or liquid, make sure it is rated accordingly.

5. Process wire or cable must not be soldered to the terminal

lug. Spade connectors are recommended to connect the
process wires to the transmitter.

igure 4-2 Wiring the 3100 Pressure Transmitter

F

4.7.3 Connecting External Wires to Transmitter Terminal Box

1. Open the cover indicated "FIELD TERMINAL". Do not open

the cover if the transmitter is located in an explosion-proof
area and powered. Connect the power supply to the
terminal indicated "+PWR"(left terminal) and "-" in the
central terminal. Do not connect "+" power supply to "+"

4.7.4 Wiring (Loop Configuration)

the circuit is powered. Both transmitter covers must be fully engaged to meet
explosion-proof requirements.

Figure 4-3 Picture of Transmitter Wiring Terminal

DANGER

Explosion can result in death or serious injury: Do not remove
the transmitter covers in an explosion-proof environment when

terminal "TEST". It will damage the test diode.

2. Seal and close the conduit connection to prevent humidity

and explosion-proof atmosphere from entering the housing.

3. Transmitter power is supplied by signal wire. Do not install

near high voltage wires or high voltage equipment.

4. Close the transmitter cover. To meet the explosion-proof

ratings make sure the covers are fully engaged.
NOTE: Do not power the transmitter with high voltage (AC).

A. Loop Configuration

Mercoid
system for power, 4~20mA analog signal transmission and
HART

®

3100 Pressure Transmitters use a two-wire

®

digital transmission.
A DC Power Supply is required for the transmitter loop. The
transmitter and power supply should be connected as
shown below.

It can damage the transmitter.

5. You must connect a 250~550 Ohm Resistor in Current
Loop (between Power Supply and Transmitter) for HART

®

Communication. See Figure 4-2.

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B.Wiring Installation

General-use (Figure 4-4a)

1. Use metallic conduit or waterproof cable glands for wiring.

a. Apply non-hardening sealant to the terminal box and
the threads on the flexible metal conduit for
waterproofing.

4.7.5 Grounding

a. Grounding should satisfy KS requirements (grounding

resistance should be 10 ohm or less). Grounding is
required for explosion-proof applications and the ground
resistance must be below 10 ohms.
[Note] In case of Built-in Lightening Protector, Grounding
should satisfy Special KS requirements (grounding
resistance, 10 ohm or less).

. There are ground terminals on the inside and outside of the

b

transmitter. Either of these terminals may be used.

c. Use 600V insulated PVC wire for grounding.

3100 Smart Pressure Transmitter

Internal and External Ground Terminal

Figure 4-4a Typical Mounting using Flexible Metal Conduit

Explosion-proof

1. Explosion-proof metal conduit wiring (Figure 4-4b)

a. A seal fitting must be installed near the terminal box

port.

b. Apply a non-hardening sealant to the threads of the

terminal connection box.

4.7.6 Power Supply Voltage and Load Resistance

When configuring the loop, make sure that the external load
resistance is within the range (see figure below). The transmitter
supply voltage should be:

• Standard : 11.9 to 45 Vdc

• HART Communication : 17.4 to 45 Vdc

And maximum loop current is 24mA, Load resistance R:
R = (E-11.9) / 0.022 (E = Power Supply Voltage)

Figure 4-4b Typical Wiring using Explosion-Proof Conduit

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4.8 Mechanical Considerations

Figure 4-6 is a dimensional drawing for the 3100. Figure 4-7 shows
how the A-630 angle bracket is mounted to a pipe.

Figure 4-6. Model 3100 Outline Dimension Drawing

4.9 Environmental Considerations

4.9.1 Ambient Temperature

The transmitter ambient temperature range is 4 to 180°F (-20 to
60°C). If the ambient temperature is going to exceed the
temperature range, precautions must be taken to keep the
temperature within the temperature limits.

4.9.2 Toxic and Moist Environments

The 3100 housing will protect the transmitter against moisture
or toxic material. The electronic circuit is separated from the
terminals. The housing covers have o-rings that seal the housing,

ut moisture can penetrate the housing thru the conduit. The

b
transmitter should be mounted in a position to prevent moisture
from entering the housing thru the conduit.

4.9.3 Installation in Hazardous Location

The transmitter is designed with an explosion-proof housing.
Installation environment must not exceed the explosion-proof
rating.

Chapter 5 On-Line Operation

5.1 Overview

This chapter describes how to configure the 3100 Smart Pressure
Transmitter. The transmitter can be configured in On-Line or Off-Line
mode. In On-Line Mode a compatible HHT or PC configuration
device must be used.

5.2 Safety Messages

For added operator safety please pay specific attention to
procedures outlined in this manual listed under the warning symbol
( ).

Figure 4-7. A-630 Mounting Bracket

4.8.1 Mounting

Avoid installing transmitters in environments with excessive
vibration. If it cannot be avoided it is highly recommended to
provide adequate support when mounting.

4.8.2 Transmitter Access

When selecting the installation location, accessibility must be
taken into consideration.

• Housing rotation: The housing can be rotated 90°.

• Wiring terminals: The cover and wiring terminals are easily
accessible.

• LCD/Circuits: Install the transmitter in a location where it
can be seen. For transmitters without an LCD, the cover
and jumpers are easily accessible.

5.2.1 Warning

DANGER

the circuit is powered. Both transmitter covers must be fully engaged to meet
explosion-proof requirements.

DANGER

power lines) the transmitter leads can be subject to high voltages. Avoid contact
with the leads and terminals.

Explosion can result in death or serious injury: Do not remove
the transmitter covers in explosion-proof environments when

Electrical shock can result in serious injury: When installing
transmitters in close proximity of high voltage sources (near

5.2.2 Current to Passive Mode Configuration

For multi-drop mode the current output must be configured as
passive mode. Please disregard any other messages shown on
HHT.

5.3 Configuration Data Review

Before operating the transmitter make sure the configuration data on
the nameplate matches the application.

5.4 Configuration Verification

Before the transmitter is ready for service, the configuration must be
checked to confirm the settings are configured for the application.

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5.4.1 Process Variable

There are two process variables in the 3100 Smart Pressure
Transmitter. The primary variable and temperature compensated

SV (Second Variable), the PV value outputs the 4~20mA analog

value.

5.5 Basic Setup

The correlation variable must be configured before operating the
transmitter.

5.5.1 Select Sensor Range

he pressure range must be selected when ordering the pressure

T
transmitter.

5.5.2 Set Output Units

Select from the following engineering units:

Volumetric Flow Unit:

CubicFeet/min, Gallons/min, Liters/min,
ImperialGallons/min, CubicMeter/hr, Ft/s, meters/s,
Gallons/s, mGallons/day, Liters/s, mLiters/day, CubicFeet/s,
CubicMeter/s, CubicMeter/day, ImperialGallons/hr,
ImperialGallons/day, NormalCubicMeter/hr, NormalLiter/hr,
StandardCubicFeet/min, CubicFeet/hr, CubicFeet/day,
CubicMeters/min, Barrels/s, Barrels/min, Barrels/hr,
Barrels/day, Gallons/hr, ImperialGallons/s, Liters/hr,
Gallons/day

Mass Flow

Grams/s, Grams/min, Grams/hr, Kilograms/s,
Kilograms/min, Kilograms/hr, Kilograms/day,
MetricTons/min, MetricTons/hr, MetricTons/day, Pounds/s,
Pounds/min, Pounds/hr, Pounds/day, ShortTons/min,
ShortTons/hr, ShortTons/day, LongTons/hr, LongTons/day

Pressure

kPa, mmH2O, InH2O, InHg, FtH2O, mmHg, psi, bar, mbar,
g/cm^2, Kg/cm^2, Pascals, MPa, torr, ATM

Miscellaneous

%

5.6 Detailed Setup

5.6.1 Set Fail Mode

When the sensor or microprocessor is not operating properly, the
transmitter will output 3.75mA or 21.75mA based on the Fail Mode
setting.

5.6.2 Set Dampening Time

The Dampening Seconds value changes the response time of the
transmitter to smooth out variations caused by rapid process
changes. Determine the appropriate dampening setting based on

he required response time, signal stability, and other

t
requirements of your system.
The Dampening Seconds can be set from 0-60 seconds; the
default dampening value is 1.0 second.

5.7 Configuration of Information Variable

5.7.1 Set Tag

Tags are an easy way to classify transmitters in multi
transmitter application. Tags can use 8 words/numbers.

5.7.2 Set Messages

When using several transmitters, the user can define each
transmitter by using 32 words/numbers. This message is saved in
EEPROM.

Time

Min, sec, hr, days

Mass

Grams, kilograms, metric tons, pounds, short tons, long
tons, ounce

Volume

Gallons, liters, imperial gallons, cubic meters, barrels,
bushels, cubic yards, cubic feet, cubic inches, bbl liq,
normal cubic meter, normal liter, standard cubic feet,
hectoliters

5.5.3 4-20mA Configuration

Set the Zero and Span for the 4~20mA analog output.

5.8 Diagnostics and Service

5.8.1 Loop Test

The Loop Test verifies the output of the transmitter, the integrity of
the loop, and the operations of any recorders or similar devices
installed in the loop. The following procedures are required for a
loop test.

• Connect a reference meter to the transmitter.

• Select the Loop Test on the HHT and operate the Loop
Test.

• Select current output (4mA/20mA/etc.)

• If the readings match, then the transmitter and the loop are
configured and functioning properly. If the readings do not
match, then you may have the current meter attached to the
wrong loop, there may be a fault in the wiring, the
transmitter may require an output trim, or the current meter
may be malfunctioning.

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5.9 Calibration

The scale is implemented by calibrating the transmitter. Trim function
has several calibration functions. Smart transmitters operate
differently than analog transmitter. A smart transmitter uses a
microprocessor that contains information about the sensor's specific
characteristics in response to pressure and temperature for
calculating the process variable. 4-20mA configuration sets the
transmitter’s analog output to a selected upper and lower range and
can be done with or without an applied pressure. 4-20mA
configuration does not change the factory characterization curve
stored in the microprocessor. Sensor trimming requires an accurate

ressure input and adds additional compensation that adjusts the

p
factory characterization curve to optimize transmitter performance
over a specific pressure range. 4-20mA configuration provides the
ability to readjust the 4~20mA sensor inputs without an applied
pressure. Reranging does not change the factory or characterization
curve stored in the microprocessor. Sensor trimming requires an
accurate pressure input and adds additional compensation to the
factory characterization curve to optimize transmitter performance
over a specific pressure range. Rerange provides ability to readjust
the 4~20 mA points sensor inputs.

5.9.1 Sensor Trim

The Sensor trim function adjusts the A/D signal conversion within
the transmitter sensor electronics and determines how it digitally
interprets any pressure changes applied to the sensor inputs. It is
highly recommended to perform a sensor trim when first
commissioning the transmitter on site. There are three ways to
trim the sensor: Sensor zero trim, full trim and zero adjustment.
Sensor zero trim is a one-point adjustment typically used to
compensate for the mounting position. Two point trim is a full
sensor trim, in which two accurate pressures are applied (equal to
or greater than the range values), and the output is linear. You
should always adjust the low trim value first to establish the
correct offset.

6.2.1 Warning

ANGER

D

he circuit is powered. Both transmitter covers must be fully engaged to meet

t
explosion-proof requirements.

DANGER

ower lines) the transmitter leads can be subject to high voltages. Avoid contact

p

ith the leads and terminals.

w

WARNING

ressure Transmitter.

P

xplosion can result in death or serious injury: Do not remove

E

he transmitter covers in explosion-proof environments when

t

Electrical shock can result in serious injury: When installing
transmitters in close proximity of high voltage sources (near

lectrical shock can result in death or serious injury:

E

nly qualified personnel can configure and wire the 3100 Smart

O

5.9.2 D/A (Digital to Analog) Trim

The D/A trim function makes minor adjustments to the analog (4­20mA) output scaling from the transmitter. It is recommended to
do a D/A trim on both hi (20mA) & low (4mA) values for best
results. This function corrects any minuscule offsets within the
D/A conversion of the transmitter

Chapter 6 Maintenance

6.1 Overview

This chapter describes diagnostic and maintenance.

6.2 Safety Messages

When the transmitter is in operation, operators should follow all
safety messages. Potential safety issues are indicated by a safety
alert symbol ( ). Refer to the following safety messages before
performing any operation proceeded by a ( ) symbol.

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6.3 Hardware Diagnostics

If there is a failure despite a diagnostic message on the HHT, Table

6.1 can help troubleshoot the problem.

Symptom

Transmitter does not

ommunicate with HART

C
Communicator

High Output

Erratic Output

Low Output or No Output

Potential Source

Loop Wiring

®

Sensor Input Failure

Loop Wiring

Power Supply

Electronics Module

Loop Wiring

Electronics Module

Sensor Element

Loop Wiring

Electronics Module

Corrective Action

• Check for a 250-550 ohms resistance
etween the power supply and HHT.

b

• Check for adequate voltage to the transmitter

(the transmitter requires 11.9 ~ 45 Vdc).

• Check for intermittent shorts, open circuits, and

multiple grounds.

• Connect HHT and enter the transmitter test

mode to isolate a sensor failure.

• Check for dirty or defective terminals,

nterconnecting pins, or receptacles.

i

• Check the output voltage of the power supply

at the transmitter terminals. It should be 11.9
to 45 Vdc.

• Connect HHT and enter the transmitter test

mode to isolate module failure. Check the
sensor limits to ensure the calibration
adjustments are within the sensor range.

• Check the output voltage of the power supply

at the transmitter terminals. It should be 11.9
to 45 Vdc.

• Check for intermittent shorts, open circuits, and

multiple grounds.

• Check for proper polarity at the signal terminals.

• Connect HHT and enter the transmitter test

mode to isolate an electronics mode failure.

• Connect HHT and enter the transmitter test

mode to isolate a sensor failure.

• Is the PV out of range.

• Check for adequate voltage to the transmitter

(the transmitter requires 11.9 ~ 45 Vdc).

• Check for intermittent shorts, open circuits, and

multiple grounds.

• Check polarity of signal terminal.

• Check the loop impedance.

• Connect HHT and check the sensor limits to

ensure calibration adjustments are within the
sensor range.

Table 6.1 Troubleshooting

6.4 Hardware Maintenance

The Mercoid

®

3100 Smart Transmitter has no moving parts and
requires little maintenance. If a transmitter fails, it must be returned
to Dwyer Instruments, Inc. for inspection, repair, or replacement.

6.4.1 Test Terminals

The test terminals are marked TEST on the terminal block. The
test and negative terminals are connected to the power terminals;
so long as the voltage across the receptacles are below the diode
threshold voltage, no current will pass through the diode. To
ensure that current isn’t leaking through the diode, test the reading
with an indicating meter. The test connection should not exceed
10 ohms. A resistance value of 30 ohms will cause an
approximate 10 percent of reading error.

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igure 6-1 Test Terminals

F

6.4.2 Disassembling the Housing

The transmitter is designed with dual-compartment housing; one
contains the electronics module, and the other contains all wiring
terminals and communication terminal.

Figure 6-2 Structure of Housing

6.4.3 Fail Mode Jumper Switch and EEPROM-Write

Fail-mode jumper switch and EEPROM-Write is located behind
the front cover.

Figure 6-3 Structure of Electronics Module

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Appendix I

3100 SMART PRESSURE TRANSMITTER - LCD DISPLAY CODE

Message

ADJ-U
ADJ-L
ZERO
SPAN
BT-ERR
P-LOCK
ZT-ERR

-TR­ZR-ERR
SP-ERR

-ZR­SP-

-

-ZA-

-DONE-

RNGOVR
LCD_OV
SCD-ER
F-RST
F-LOCK
F-FAIL

-FR-

A-RST
A-STOR
A-FAIL

-AC-

S-FL
S-OP
AEP-RF
TS-FL
AEP-WF
EOSC
FAVE

Description

Zero adjustment value – used to configure transmitter when it is out of range (on higher side)

ero adjustment value – used to configure transmitter when it is out of range (on low side)

Z
Initial message when using Zero button
Initial message when using Span button
Button Sequence error
Button input error - Protect Locked
Zero Trim value is over limit (10%)
Zero Trim done
Setting Limit error when executing Zero button function
Setting Limit error when executing Span button function
Zero button function done
Span button function done
Zero Adjustment done
Configuration completed using buttons
Limit error when executing other setting function
Over Values for LCD
Sensor Code Error
Flash Setting Data Reset
Flash Setting Data Reset, Protect Locked
Flash Setting Data Reset Failure
Flash Reset done
Analog EEPROM Initializing Start
Analog EEPROM Stored
Failure in writing configuration values on to the EEPROM of transmitter CPU
Analog EEPROM Configuration done
Sensor Fail
Sensor Overpressure
Check error with EEPROM on CPU board
Temperature Sensor Error
Analog EEPROM write fail
Crystal Element Defect Alarm
Flash Access Violation

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