Dwyer LTI User guide

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Page 1

Series LTI Temperature Input Meter

Instruction Manual

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, IN 46360, U.S.A.

Fax: 219/872-9057

e-mail: [email protected]

• 1/8 DIN Digital Panel Temperature Meter with NEMA 4X, IP65 Front

• J, K, T, E, R, S, B, N, C Thermocouples

• 100 or 1000 Ω Platinum, 10 Ω Copper, 120 Ω Nickel RTDs

• Optional Isolated 4-20 mA Output Turns the Meter into a Temperature Transmitter

• 1° or 0.1° Resolution

• Averages up to 10 RTD Sensors

• Automatic Cold Junction Compensation

• Dual-Line 6-Digit Display, 0.6" (15 mm) & 0.46" (12 mm)

• 2 or 4 Relays with Interlocking Capability + Isolated 4-20 mA Output Options

• Free PC-Based, Onboard, Panel Meter Pro USB Programming Software

• No Assembly Required

• Operating Temperature Range: -20 to 65°C (-4 to 149°F)

• UL & C-UL Listed. E160849; 508 Industrial Control Equipment

• Input Power Options: 85-265 VAC / 90-265 VDC or 12-24 VDC / 12-24 VAC

• Programmable Display, Function Keys & Digital Input

• External 4-Relay & Digital I/O Expansion Modules

• RS-232 & RS-485 Serial Communication Options with Modbus RTU

• Password Protection

• Wide Assortment of NEMA 4X Enclosures for up to Ten Meters

• 3-Year Warranty

Bulletin: T-LTI

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

Page 2

Series LTI Temperature Input Meter Instruction Manual

Disclaimer

The information contained in this document is subject to change without notice. Dwyer Instruments, Inc. makes no representations or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for a particular purpose. See Warranty Information and Terms & Conditions on www.dwyer-inst.com details.

• Read complete instructions prior to installation and operation of the meter.

for complete

FREE Panel Meter Pro Programming Software

• Risk of electric shock or personal injury.

• This product is not recommended for life support

applications or applications where malfunctioning

could result in personal injury or property loss.

Anyone using this product for such applications does so at his/her own risk. Dwyer Instruments, Inc. shall not be held liable for damages resulting from such improper use.

WARNING

Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Limited Warranty

Dwyer Instruments, Inc. warrants this product

against defects in material or workmanship for

the specified period under “Specifications” from the date of shipment from the factory. Dwyer Instruments’ liability under this limited warranty shall not exceed the purchase value, repair, or replacement of the defective unit. See Warranty Information and Terms & Conditions on

www.dwyer-inst.com

Registered Trademarks

All trademarks mentioned in this document are the property of their respective owners.

for complete details.

The meter can be powered from the Micro USB connection. When using the Micro USB connection, DO NOT apply AC or DC power to the meter.

The easiest and quickest way to program your LTI meter is to use the FREE Panel Meter Pro programming software. This software is loaded into the meter and connects and installs directly to your

PC with a USB cable. We recommend that the first thing you do after taking the meter out of the box is

connect the LTI to your PC with the provided USB cable – do not use a different cable. DO NOT apply AC or DC power to the meter while your PC is connected to the meter as it will disrupt the USB connection. You don’t even have to apply an input signal.

Panel Meter Pro programming software is intuitive, and most customers can get their meter programmed

as they like without even looking in the manual.

In addition to programming, the software may be used

for:

• Monitoring

• Datalogging using your PC

• Generating and saving programming files for

later use

Once your meter is programmed the way you want it, you can wire it up for your application per the instructions in this manual and install it. If you find that

you need to make adjustments to the programming

after the meter is installed, you can use the front panel buttons and the instructions in this manual to do so.

Page 3

Series LTI Temperature Input Meter Instruction Manual

Table of Contents

Introduction ......................................................................................................... 6

Ordering Information .......................................................................................... 6

Specifications ..................................................................................................... 7

General ............................................................................................................ 7

Temperature Input .......................................................................................... 8

Relays .............................................................................................................. 8

Isolated 4-20 mA Output ................................................................................ 9

USB Connection ............................................................................................. 9

On-Board Digital Input (F4) ........................................................................... 9

Modbus® RTU Serial Communications ......................................................... 9

Panel Meter Pro .............................................................................................. 9

Compliance Information................................................................................... 10

Safety ............................................................................................................ 10

Electromagnetic Compatibility .................................................................... 10

Safety Information ............................................................................................ 10

Installation......................................................................................................... 10

Unpacking ..................................................................................................... 10

Panel Mounting Instructions ....................................................................... 11

Mounting Dimensions ................................................................................ 11

Installation Overview ................................................................................... 12

Panel Meter Pro Software ............................................................................ 12

Panel Meter Pro Installation ....................................................................... 12

Connections ................................................................................................. 13

Connectors Labeling .................................................................................. 13

Power Connections .................................................................................... 13

Signal Connections .................................................................................... 14

Connections for Averaging RTD Sensors .................................................. 14

Modbus RTU Serial Communications ........................................................ 14

Relay Connections ..................................................................................... 15

Switching Inductive Loads.......................................................................... 15

F4 Digital Input Connections ...................................................................... 15

4-20 mA Output Connections ..................................................................... 15

Analog Output Power Supply ..................................................................... 15

External Relays & Digital I/O Connections ................................................. 16

Interlock Relay Feature .............................................................................. 16

Setup and Programming .................................................................................. 17

Front Panel Buttons and Status LED Indicators........................................ 17

Display Functions & Messages ................................................................... 18

Main Menu ..................................................................................................... 19

Setting Numeric Values ............................................................................... 20

Setting Up the Meter (setup) ....................................................................... 20

Setting the Input Signal (Input) ................................................................. 20

Selecting the Temperature Scale (F or C)................................................ 20

Setting the Decimal Point (dEc pt) ........................................................... 20

Setting the Display Parameter & Intensity (dsplay) .................................. 21

Display Intensity (d-Inty).......................................................................... 21

Setting the Display Units or Custom Tags (units) .................................... 21

Setting the Relay Operation (relay) ........................................................... 22

Setting the Relay Action ............................................................................. 22

Programming Set and Reset Points ........................................................... 23

Setting Fail-Safe Operation ........................................................................ 23

Programming Time Delay .......................................................................... 23

Relay Action for Loss of Input (Input Break) .............................................. 23

Relay and Alarm Operation Diagrams ........................................................ 23

High Alarm Operation (Set > Reset) ............................................................. 23

Low Alarm Operation (Set < Reset) ........................................................... 23

High Alarm with Fail-Safe Operation (Set > Reset) .................................... 24

Low Alarm with Fail-Safe Operation (Set < Reset)..................................... 24

Relay Sampling Operation ......................................................................... 24

Signal Loss or Input Break Relay Operation .............................................. 24

Time Delay Operation ................................................................................ 25

Page 4

Series LTI Temperature Input Meter Instruction Manual

Relay Operation Details ............................................................................... 25

Overview .................................................................................................... 25

Relays Auto Initialization ............................................................................ 25

Fail-Safe Operation .................................................................................... 25

Front Panel LEDs ....................................................................................... 26

Latching and Non-Latching Relay Operation ............................................. 26

Non-Latching Relay (Auto) ........................................................................ 26

Non-Latching Relay with Manual Reset (A-nman) ...................................... 26

Latching Relay (LatcH) .............................................................................. 26

Latching Relay with Clear (Lt-Clr) ........................................................... 27

Acknowledging Relays ............................................................................... 27

Setting Up the Interlock Relay (Force On) Feature .................................... 27

Scaling the 4-20 mA Analog Output (Aout) ................................................ 28

Reset Menu (reset) ...................................................................................... 28

Manual Control Menu (Contrl) ................................................................... 28

Setting Up the Password (pass) .................................................................. 29

Protecting or Locking the Meter ................................................................. 29

Making Changes to a Password Protected Meter ...................................... 29

Disabling Password Protection .................................................................. 29

Advanced Features Menu ............................................................................ 30

Advanced Features Menu & Display Messages ......................................... 30

Offset Adjust (Adjust) ............................................................................... 31

Recalibration of the Meter (t CAL) ............................................................. 31

Noise Filter (filter) ................................................................................. 31

Noise Filter Bypass (bypass) ..................................................................... 32

Rounding Feature (round) ......................................................................... 32

Modbus RTU Serial Communications (serial) ......................................... 32

Select Menu (SElect) ................................................................................ 32

Analog Output Programming (AoutPr) ...................................................... 32

Programmable Function Keys User Menu (user) ...................................... 33

Internal Temperature Calibration (ICAL) .................................................... 34

Meter Operation ................................................................................................ 35

Front Panel Buttons Operation ................................................................... 35

Function Keys Operation ............................................................................. 35

F4 Operation ................................................................................................. 35

Maximum/Minimum Readings ..................................................................... 35

Troubleshooting ............................................................................................... 36

Diagnostics Menu (diag) ............................................................................. 36

Determining Software Version ................................................................... 36

Reset Meter to Factory Defaults.................................................................. 36

Factory Defaults & User Settings ............................................................... 37

Troubleshooting Tips ................................................................................... 38

Page 5

Series LTI Temperature Input Meter Instruction Manual

Table of Figures

Figure 1: 1/8 DIN Panel Cutout and Mounting ................................................ 11

Figure 2. Meter Dimensions - Side View ......................................................... 11

Figure 3. Meter Dimensions - Top View .......................................................... 11

Figure 4. LTI-100 and LTI-200 Connectors Label ........................................... 13

Figure 5. LTI-120 and LTI-220 Connectors Label ........................................... 13

Figure 6. LTI-101 and LTI-201 Connectors Label ........................................... 13

Figure 7. LTI-140 and LTI-240 Connectors Label ........................................... 13

Figure 8. LTI-121 and LTI-221 Connectors Label ........................................... 13

Figure 9. LTI-141 and LTI-241 Connectors Label ........................................... 13

Figure 10. Power Connections ........................................................................ 13

Figure 11. Thermocouple Input Connections ................................................. 14

Figure 12. Three-Wire RTD Input Connections .............................................. 14

Figure 13. Two-Wire RTD Input Connections ................................................. 14

Figure 14. Four-Wire RTD Input Connections ................................................ 14

Figure 15. Average Temperature RTD Input Connections ............................ 14

Figure 16. Relay Connections ......................................................................... 15

Figure 17. AC and DC Loads Protection ......................................................... 15

Figure 18. Low Voltage DC Loads Protection ................................................ 15

Figure 19. F4 Digital Input Connections ......................................................... 15

Figure 20. 4-20 mA Output Connections ........................................................ 15

Figure 21. Analog Output Supply Powering Other Devices .......................... 15

Figure 22. Expansion Module & DIN Rail Mounting Kit ................................. 16

Figure 23. External Relays Module Connections ........................................... 16

Figure 24. Digital I/O Module Connections ..................................................... 16

Figure 25. Interlock Connections .................................................................... 16

Page 6

Series LTI Temperature Input Meter Instruction Manual

85-265 VAC

12-24 VDC

LTI-100

LTI-200

No options

LTI-101

LTI-201

4-20 mA output

LTI-120

LTI-220

2 relays

LTI-121

LTI-221

2 relays & 4-20 mA output

LTI-140

LTI-240

4 relays

LTI-141

LTI-241

4 relays & 4-20 mA output

Model

Description

PMA-01

RS-232 serial adapter

PMA-02

USB serial adapter

PMA-03

RS-422/485 serial adapter

PMA-04

RS-232 to RS-422/485 isolated converter

PMA-05

RS-232 to RS-422/485 non-isolated converter

PMA-06

USB to RS-232 non-isolated converter

PMA-07

USB to RS-422/485 isolated converter

PMA-08

USB to RS-422/485 non-isolated converter

PMA-09

Suppressor (snubber): 0.01 μF/470 Ω, 250 VAC

DIN rail mounting kit for two expansion

modules

PMA-11

4 SPST (Form A) relays

4 digital inputs & 4 digital outputs (2 may be connected)

Series

Meters

Material

PME-10

1-10

Plastic NEMA 4X

PME-20

1-6

Plastic NEMA 4X

PME-30

1-6

Stainless Steel NEMA 4X

PME-40

1-6

Painted Steel NEMA 4

PME-00

1-2

Plastic NEMA 4X

Introduction

The LTI temperature meter accepts a direct temperature input from a wide range of temperature measurement devices (type J, K, T, E, R, S, B, N, and

C thermocouples and 100 or 1000 Ω platinum, 10 Ω copper, 120 Ω nickel RTDs). It displays the measured

temperature in either degrees Fahrenheit or degrees Celsius on a dual-line, 6-digit display. The display

features superluminous LED digits that make it easily readable in smoke, dust, and fog.

The LTI can be equipped with an optional 4-20 mA output that turns a temperature meter into an isolated temperature transmitter with a big, bright display!

The LTI includes automatic cold junction

compensation for thermocouples and the ability to

average up to ten (10) RTD sensors.

A fully loaded LTI meter has the following: four SPDT relays, 4-20 mA output, and one 24 VDC power supply to power the 4-20 mA output. The LTI

capabilities may be enhanced by adding the following

external expansion modules: four SPST relays (creating an eight-relay temperature meter), two digital I/O modules with four inputs and four outputs each, and USB, RS-232 or RS-485 communication adapters. A digital input is standard.

The eight relays can be used for alarm indication or

on/off temperature control applications. The 4-20 mA

isolated output, Modbus RTU serial communications, and digital I/O options make the LTI an excellent

addition to any system.

Ordering Information

Model

Accessories

PMA-10

PMA-12

Enclosures

Model

Options Installed

Page 7

Series LTI Temperature Input Meter Instruction Manual

Line 1: 0.60" (15 mm) high red LEDs;

resolution and

with 1° resolution.

1° or 0.1° for all thermocouple and RTD inputs

Underrange

Three programmable passwords restrict

keys, and digital inputs.

Normal Mode Rejection

Operating temperature range:

relays, digital I/O, and serial communication

Torque

Specifications

Except where noted all specifications apply to operation at +25°C.

General

Display

Resolution

Display Intensity

Display Update Rate

Overrange Display flashes 99999

Programming Methods

Noise Filter

Filter Bypass

Recalibration

Max/Min Display

Rounding Select 1, 2, 5, 10, 20, 50, or 100

Password

Non-Volatile Memory

Power Options

Fuse

Line 2: 0.46" (12 mm) high red LEDs. Both displays have six characters with leading zero blanking. Temperature displayed on line 1 with four or five-digits and F/C indication, based on configuration. Example 2347.2F with 0.1

2347°F

Eight user selectable intensity levels

5/second (200 ms)

Display flashes -9999

Four front panel buttons, digital inputs, PC

and Panel Meter Pro software, or Modbus registers.

Programmable from 2 to 199 (0 will disable filter)

Programmable from 0.1 to 99.9% of calibrated span

All ranges are calibrated at the factory. Recalibration is recommended at least

every 12 months.

Max/min readings reached by the process are stored until reset by the user or until

power to the meter is cycled.

(e.g. rounding = 10, value = 123.45, display = 123.50).

modification of programmed settings. Pass 1: Allows use of function keys and

digital inputs Pass 2: Allows use of function keys, digital inputs and editing set/reset points Pass 3: Restricts all programming, function

All programmed settings are stored in nonvolatile memory for a minimum of ten years if power is lost.

85-265 VAC 50/60 Hz; 90-265 VDC, 20 W max; 12-24 VDC, 12-24 VAC, 15 W max. Powered over USB for configuration only.

Required external fuse: UL Recognized, 5 A max, slow blow; up to 6 meters may

share one 5 A fuse

Greater than 60 dB at 50/60 Hz

Environmental

Connections

Enclosure

Front Panel NEMA 4X, IP65

Mounting

Tightening

Overall Dimensions

Weight 9.5 oz (269 g)

Warranty

-20 to 65°C (-4 to 149°F)

Storage temperature range:

-40 to 85°C (-40 to 185°F)

Relative humidity:

0 to 90% non-condensing

Removable screw terminal blocks accept

12 to 22 AWG wire, RJ45 for external

adapters.

1/8 DIN, high impact plastic, UL 94V-0,

color: black

1/8 DIN panel cutout required:

3.622" x 1.772" (92 mm x 45 mm)

Two panel mounting bracket assemblies

are provided.

Screw terminal connectors: 5 lb-in (0.56 Nm)

4.68" x 2.45" x 5.64" (119 mm x 62 mm x 143 mm) (W x H x D)

3 years parts & labor. See Warranty

Information and Terms & Conditions on

www.dwyer-inst.com

for complete details.

Isolation

Overvoltage Category

4 kV input/output-to-power line 500 V input-to-output

Installation Overvoltage Category II: Local level with smaller transient overvoltages than Installation Overvoltage Category III.

Page 8

Series LTI Temperature Input Meter Instruction Manual

Inputs

Thermocouple: J, K, T, E, R, S, B, N, C

Cold

Reference

Automatic, fixed, no user calibration

Temperature

±2°C maximum from 0 to 65°C ambient

Offset

User programmable offset adjust

Input

Greater than 100 kΩ

Sensor Break

Open TC or RTD sensor indicated by

programmed to go “On”, “Off”, or to “Ignore”

RTD

Up to 10 RTDs connected in parallel can be

Accuracy & Ranges

Type

Range (°F)

Accuracy

Range (°C)

Accuracy

Deadband

• Automatic (non-latching) and/or

• Manual on/off control mode

User selectable via front panel button, F4

communications.

Programmable and independent for

condition. In case of power failure, relay will

Temperature Input

RTD: 100 Ω platinum (0.00385 & 0.00392 coefficients), 10 Ω copper, 120 Ω nickel,

1000 Ω platinum (0.00385 & 0.00392

coefficients)

Junction

Drift

Adjustment

Impedance

Detection

Averaging

needed

temperature ±4°C maximum from -20 to 0°C ambient temperature

±50.0 degrees. This parameter allows the user to apply an offset value to the temperature being displayed.

display flashing oPEn, relays can be

(Note: Ignore is detected as an upscale condition).

Analog output goes to the programmed sensor break value.

averaged.

Relays

Rating

Noise Suppression

High or Low Alarm

Relay Operation

Relay Reset

2 or 4 SPDT (Form C) internal and/or 4 SPST (Form A) external; rated 3 A @ 30 VDC and 125/250 VAC resistive load; 1/14 HP (≈ 50 W) @ 125/250 VAC for inductive loads

Noise suppression is recommended for each relay contact switching inductive loads. See Switching Inductive Loads on page 15 for details.

0-100% of span, user programmable

User may program any alarm for high or low trip point.

Unused alarm LEDs and relays may be disabled (turn off).

manual reset

• Latching (requires manual acknowledge) with or without clear

• Pump alternation control (2-8 relays)

• Sampling (based on set point and

time)

• Off (disable unused relays and enable Interlock feature)

terminal at back of meter, external contact

closure on digital inputs, or through serial

J -200 to 2000 ±1.8°F -129 to 1093 ±1°C

K -200 to 2400 ±1.8°F -129 to 1316 ±1°C

T -200 to 752 ±1.8°F -129 to 400 ±1°C

E -200 to 1800 ±1.8°F -129 to 982 ±1°C

R -50 to 3000 ±3.6°F -46 to 1649 ±2°C

S -50 to 3000 ±3.6°F -46 to 1649 ±2°C

B 752 to 3300 ±3.6°F 400 to 1816 ±2°C

N -100 to 2300 ±3.6°F -73 to 1260 ±2°C

C 32 to 4100 ±3.6°F 0 to 2260 ±2°C

-328 to 500 ±0.2°F -200 to 260 ±0.1°C

10Ω

-328 to 1562 ±0.7°F -200 to 850 ±0.4°C

100Ω

-110 to 500 ±0.2°F -79 to 260 ±0.1°C

120Ω

-328 to 900 ±0.7°F -200 to 482 ±0.4°C

1000Ω

All ranges capable of 1° or 0.1° resolution.

Time Delay

Fail-Safe Operation

Auto Initialization

Additional Relays

0 to 999.9 seconds, on & off relay time delays. each relay

Programmable and independent for each

relay.

Note: Relay coil is energized in non-alarm

go to alarm state.

When power is applied to the meter, relays will reflect the state of the input to the meter.

An external module, model PMA-11, is

available to add 4 SPST 3 A relays to the

meter.

Page 9

Series LTI Temperature Input Meter Instruction Manual

Source

Range

Analog Out External Loop Cable

Slave Id

Data

System Requirements

Microsoft® Windows® XP/Vista/7/8/10

Communications

USB 2.0 (for programming only)

logging)

Configuration

Configure meters one at a time

Power

USB port provides power to the meter.

meter while the USB port is in use.

Isolated 4-20 mA Output

Output

Scaling

Calibration

Programming

Accuracy ± 0.1% of span ± 0.004 mA

Temperature Drift

Power Supply for Analog Output Loop Or Other Uses

Power Supply

Output Loop Resistance

35 VDC (external)

PV (temperature), max, min, set points 1-8, Modbus PV input, or manual control mode

1.000 to 23.000 mA for any display range

Factory calibrated:

0.0 to 2000.0 = 4-20 mA output

23.000 mA maximum for all parameters: Overrange, underrange, max, min, and break

0.4 µA/°C max from 0 to 65°C ambient,

0.8 µA/°C max from -20 to 0°C ambient

Note: Analog output drift is separate from input drift.

Terminals I+ & R: 24 VDC ± 10%. May be used to power the 4-20 mA output or other devices.

All models rated @ 40 mA max.

35 VDC maximum

Power supply Minimum Maximum

24 VDC

10 Ω 700 Ω

100 Ω 1200 Ω

Modbus® RTU Serial Communications

1 – 247 (Meter address)

Baud Rate 300 – 19,200 bps

Transmit Time Delay

Parity Even, Odd, or None with 1 or 2 stop bits

Byte-To-Byte Timeout

Turn Around Delay

Note: Refer to the LTI Modbus Register Tables located at

www.dwyer-inst.com

Programmable between 0 and 199 ms

8 bit (1 start bit, 1 or 2 stop bits)

0.01 to 2.54 sec

Less than 2 ms (fixed)

for details.

Panel Meter Pro

(Standard USB A to Micro USB B) RS-232 adapter, RS-485 adapter and

RS-485 to USB converter (programming, monitoring, and data

USB Connection

Function Programming only

Compatibility USB 2.0 Standard, Compliant

Connector Type

Driver Microsoft® Windows® XP/Vista/7/8/10

Power

Micro-B receptacle

USB A Male to Micro-B Cable

USB port provides power to the meter.

DO NOT apply AC or DC power to the meter while the USB port is in use.

On-Board Digital Input (F4)

Function

Contacts

Logic Levels

Additional I/O

Remote operation of front-panel buttons, acknowledge/reset relays, reset max/min

values. See Function Keys & Digital I/O Available Settings on page 33 for a

complete list of capabilities.

3.3 VDC on contact. Connect normally open contacts across F4 to COM

Logic High: 3 to 5 VDC Logic Low: 0 to 1.25 VDC

Up to 2 external modules, model PMA-12 with 4 digital inputs and 4 digital outputs each can be added.

DO NOT apply AC or DC power to the

Page 10

Series LTI Temperature Input Meter Instruction Manual

UL & c-UL Listed

USA & Canada UL 508 Industrial Control Equipment

UL File Number

E212517

Front Panel

UL Type 4X, NEMA 4X, IP65; panel gasket provided

Low Voltage

EN 61010-1:2010

control, and laboratory use

Emissions

EN 55022:2010 Class A ITE emissions requirements

Radiated Emissions

Class A

AC Mains

Emissions

Class A

Immunity

EN 61326-1:2013

standard

RFI - Amplitude

80 -1000 MHz 10 V/m 80% AM (1 kHz)

2.0 - 2.7 GHz 1 V/m 80% AM (1 kHz)

Electrical Fast Transients

±2kV AC mains, ±1kV other

Electrostatic Discharge

±4kV contact, ±8kV air

RFI Conducted

10V, 0.15-80 MHz, 1kHz 80% AM

AC Surge

±2kV Common, ±1kV Differential

Surge

1KV (CM)

Power-

Magnetic Field

30 A/m 70%V for 0.5 period

Voltage Dips

40%V for 5 & 50 periods 70%V for 25 periods

Voltage Interruptions

<5%V for 250 periods

Compliance Information

Safety Information

Safety

Directive

Safety requirements for measurement,

Electromagnetic Compatibility

Conducted

Measurement, control, and laboratory equipment

EN 61000-6-2:2005 EMC heavy industrial generic immunity

Modulated

1.4 - 2.0 GHz 3 V/m 80% AM (1 kHz)

• Read complete instructions prior to installation and operation of the meter.

• Risk of electric shock or personal injury.

• Hazardous voltages exist within enclosure.

Installation and service should be performed only by trained service personnel.

Installation

There is no need to remove the meter from its case to complete the installation, wiring, and setup.

Unpacking

Remove the meter from box. Inspect the packaging and contents for damage. Report

damages, if any, to the carrier. If any part is missing or the meter malfunctions, please contact your supplier or the factory for assistance.

Frequency

Note:

Testing was conducted on meters installed through the covers of grounded metal enclosures with cable shields grounded at the point of entry representing installations designed to optimize EMC performance.

Page 11

Series LTI Temperature Input Meter Instruction Manual

Gasket

Panel

ounti

Brack

Moun

ting

crew

cro U

Connec

tio

Removable Connectors

0.39"

(10 mm)

4.18"

(106 mm)

1.72"

(44 mm)

4.77"

(121 mm)

5.07"

(129 mm)

2.41"

(61 mm)

4.41"

(112 mm)

4.18"

(106 mm)

3.61"

(91.5 mm)

Optional

Connectors

Installed

3.622" (92 mm)

1.772"

(45mm)

Panel Cutout

to DIN 43700

Square Corners to 0.060"

(1.5mm) Max Radius

Tolerances:

A: +0.032 (+0.8mm)

-0.000 (-0.0mm)

B: +0.024 (+0.6mm)

-0.000 (-0.0mm)

Panel Mounting Instructions

• Prepare a standard 1/8 DIN panel cutout –

3.622" x 1.772" (92 mm x 45 mm). Refer to Figure 1: 1/8 DIN Panel Cutout and Mounting below for more details.

• Clearance: allow at least 6.0" (152 mm) behind

the panel for wiring.

• Panel thickness: 0.04" - 0.25" (1.0 mm - 6.4 mm). Recommended minimum panel thickness to

maintain Type 4X rating: 0.06" (1.5 mm) steel panel, 0.16" (4.1 mm) plastic panel.

• Remove the two mounting brackets provided with the meter (back-off the two screws so that there is ¼" (6.4 mm) or less through the bracket. Slide the bracket toward the front of the case and remove).

• Insert meter into the panel cutout.

• Install mounting brackets and tighten the screws

against the panel. To achieve a proper seal,

tighten the mounting bracket screws evenly until

meter is snug to the panel along its short side. DO NOT OVER TIGHTEN, as the rear of the panel may be damaged.

Mounting Dimensions

Figure 2. Meter Dimensions - Side View

DO NOT apply AC or DC power to the meter when using the Micro USB connection.

Figure 1: 1/8 DIN Panel Cutout and Mounting

Figure 3. Meter Dimensions - Top View

Page 12

Series LTI Temperature Input Meter Instruction Manual

Installation Overview

We recommend the following sequence for getting the meter into service:

1. DO NOT apply AC or DC power to the meter.

2. Connect the meter to the PC with the USB cable provided. DO NOT use a different USB cable.

3. If Panel Meter Pro is already installed in your computer, then the program will launch automatically in most systems. If the program does not start automatically, double-click on the MVPro icon.

4. If MVPro is not installed, follow the instructions provided below.

5. Use MVPro to configure the meter for your application.

6. Disconnect the USB cable from the meter.

7. Apply power and signal and check operation of the meter.

8. Install the meter and put into service.

9. Make any programming adjustments using the front panel buttons.

2. Once the driver is installed, an AutoPlay dialog should appear for the drive

“MAINSTAL.” Click “Open folder to view

files.”

If the computer does not display an AutoPlay dialog for the drive “MAINSTAL,” you should

open My Computer and double-click on the drive labeled “MAINSTAL.”

3. Double-click on the file named “MAStart.” The program will open a few windows and install two programs on your computer. Simply follow the on-screen instructions until

you see one of the dialogs below. If you

receive a “User Account Control” warning, click “Yes.”

Panel Meter Pro Software

The easiest and quickest way to program your LTI meter is to use the FREE Panel Meter Pro programming software. This software is loaded into the meter and connects and installs directly to your PC with the USB cable provided. DO NOT use a different USB cable. We recommend that the first

thing you do after taking the meter out of the box is

connect the LTI to your PC with the provided USB cable. DO NOT apply AC or DC power to the meter while your PC is connected to the meter as it will disrupt the USB connection. It is not necessary to apply an input signal.

Panel Meter Pro programming software is intuitive, and most customers can get their meter programmed as they like without even looking in the manual.

4. If there is an update available, click the

“Update” button to install the new version. Otherwise, click “Configure” to begin

programming your meter.

Panel Meter Pro Installation

1. Connect one end of the provided USB cable

to the meter and the other end to the computer. The computer will automatically

install the driver software it needs to talk to

the meter. Follow the on-screen instructions and allow sufficient time for the process to complete. This can take a few minutes. If the process is interrupted, then it could leave the

system in an unstable condition.

• Only one meter may be connected at a time.

Attaching multiple meters will cause a conflict with the meter software.

• DO NOT apply AC or DC power to the meter

when using the Micro USB connection.

Note: If you decide to update your Panel Meter Pro software, once the installation has completed, you

will be asked if you want to update the setup files

located on the meter itself. This way, you will always have the most current version on the meter for future installs.

• DO NOT unplug the meter while the new

installation files are being written to it. The meter

will display uwrite during the process and you will receive an on-screen notification once the process is complete.

Page 13

Series LTI Temperature Input Meter Instruction Manual

AC or DC

POWER

Required External Fuse:

5 A max, 250 V Slow Blow

POWER

Connections

All connections are made to removable screw terminal connectors located at the rear of the meter.

• Use copper wire with 60°C or 60/75°C insulation

for all line voltage connections. Observe all safety regulations. Electrical wiring should be performed in accordance with all applicable national, state,

and local codes to prevent damage to the meter and ensure personnel safety.

Connectors Labeling

The connectors’ label, affixed to the meter, shows the location of all connectors available with requested

configuration.

Figure 7.

Figure 8. LTI-121 and LTI-221 Connectors Label

LTI-140 and LTI-240 Connectors Label

Figure 4.

Figure 5. LTI-120 and LTI-220 Connectors Label

Figure 6.

LTI-100 and LTI-200 Connectors Label

LTI-101 and LTI-201 Connectors Label

Figure 9. LTI-141 and LTI-241 Connectors Label

• DO NOT connect any equipment other than Dwyer Instruments’ expansion modules, cables, or meters to the RJ45 M LINK connector.

Otherwise damage will occur to the equipment

and the meter.

Power Connections

Power connections are made to a two-terminal

connector labeled POWER. The meter will operate regardless of DC polarity connection. The + and symbols are only a suggested wiring convention.

Figure 10. Power Connections

Page 14

Series LTI Temperature Input Meter Instruction Manual

SIGNAL

EXC T+

COM

1 2

RTD

TYPE

100

RANGE

M-LINK

1 2 3 4 5 6 7 8

RTD

Sensor

SIGNAL

EXC T+ COM

1 2 3

RTD

TYPE

100

RANGE

M-LINK

1 2 3 4 5 6 7

RTD

Sensor

SIGNAL

EXC T+ COM

1 2 3

RTD

TYPE

100

RANGE

M-LINK

1 2 3 4 5 6 7 8

RTD

Sensor

SIGNAL

EXC

T+

COM

1 2 3

RTD

TYPE

100

RANGE

M-LINK

1 2 3 4 5 6 7 8

RTD1

SIGNAL

EXC

T+ COM

1 2

RTD

TYPE

100

RANGE

M-LINK

1 2 3 4 5 6 7 8

RTD2 RTD3

Signal Connections

Signal connections are made to a three-terminal connector labeled SIGNAL.

Thermocouple and RTD Connections

The following figures show examples for thermocouple and RTD connections.

The TYPE selector switch must be set to the proper position for the meter to accept the selected RTD or TC input.

The RANGE selector switch is used to select 100ohm platinum or 10-ohm copper RTD. The 1000-ohm platinum RTD input uses the same setting as the 100ohm RTD.

The input type is selected using the Setup menu. The selected thermocouple input must correspond to

the thermocouple sensor and wire type used. The meter accepts two, three, or four-wire RTDs. The

three-wire RTD connection has built-in lead wire compensation. Lead wire compensation for two-wire RTDs can be applied using the Adjust menu. See the Advanced Features Menu on page 30. The four-wire RTD connection is similar to the threewire. One of the leads of a four-wire RTD is not connected, and may be clipped off.

The three-wire connection provides sufficient lead

wire compensation to obtain accurate readings even

with long leads.

Figure 13. Two-Wire RTD Input Connections

Figure 14. Four-Wire RTD Input Connections

Connections for Averaging RTD Sensors

To obtain the average temperature from 2 to 10 RTD sensors, connect all the sensors in parallel and select the number of sensors in the RTD Total (rtdtot) menu. See the Advanced Features Menu on page 30.

Figure 11. Thermocouple Input Connections

Figure 12. Three-Wire RTD Input Connections

Figure 15. Average Temperature RTD Input

Connections

Modbus RTU Serial Communications

Serial communications connection is made to an RJ45 connector labeled M-LINK. For interfacing to the MPM, use the PMA-01 for RS-232 or the PMA-03 for RS-485. The same port is used for interfacing with all expansion modules (e.g. external relays, digital I/O).

Page 15

Series LTI Temperature Input Meter Instruction Manual

C NONO NC NC

RELAY4 RELAY3

6 5 2 1

C NONO NC NC C

RELAY2 RELAY1

4 36 5 2 1

Relay Connections

Relay connections are made to two six-terminal connectors labeled RELAY1 – RELAY4. Each relay’s C terminal is common only to the normally open (NO) and normally closed (NC) contacts of the corresponding relay. The relays’ C terminals should

not be confused with the COM (common) terminal of

the INPUT SIGNAL connector.

Figure 16. Relay Connections

Switching Inductive Loads

The use of snubbers to suppress electrical noise is

strongly recommended when switching inductive loads to prevent disrupting the microprocessor’s

operation. The snubbers also prolong the life of the

relay contacts. Suppression can be obtained with resistor-capacitor (RC) networks assembled by the

user or purchased as complete assemblies. Refer to the following circuits for RC network assembly and

installation:

RC Networks (Snubbers) Available from Dwyer Instruments, Inc.

RC networks are available from Dwyer Instruments, Inc. and should be applied to each relay contact switching an inductive load. Part number: PMA-13.

Note: Relays are de-rated to 1/14th HP (50 watts) with an inductive load.

F4 Digital Input Connections

A digital input, F4, is standard on the meter. This digital input should be connected with a normally open closure across F4 and COM, or with an active low signal applied to F4. It can be used for remote operation of front-panel buttons, to acknowledge/reset relays, or to reset max/min values. See Function Keys & Digital I/O Available Settings on page 33 for a complete list of capabilities.

Figure 19. F4 Digital Input Connections

4-20 mA Output Connections

Connections for the 4-20 mA output are made to the

connector terminals labeled mA OUT. The 4-20 mA output may be powered internally or from an external

power supply.

Choose R and C as follows: R: 0.5 to 1 Ω for each volt across the contacts C: 0.5 to 1 µF for each amp through closed contacts

Notes:

1. Use capacitors rated for 250 VAC.

2. RC networks may affect load release time of solenoid loads. Check to confirm proper operation.

3. Install the RC network at the meter's relay screw terminals. An RC network may also be installed across the load. Experiment for best results.

Use a diode with a reverse breakdown voltage two to three

times the circuit voltage and forward current at least as large as the load current.

Figure 18. Low Voltage DC Loads Protection

Figure 17. AC and DC Loads Protection

Figure 20. 4-20 mA Output Connections

Analog Output Power Supply

The internal 24 VDC power supply powering the

analog output may be used to power other devices, if the analog output is not used. The I+ terminal is the +24 V and the R terminal is the return.

Figure 21. Analog Output Supply Powering

Other Devices

Page 16

Series LTI Temperature Input Meter Instruction Manual

1 2

RLY5

RLY6 RLY7 RLY8

3 4 5 6 7 8

NO C NO C NO C NO C

1 2 3 4 5 6

+5 I1 I2 I3 I4 O1

7 8

O2 O3

9 10

O4 G

DI 1-4 DO 1-4

5 VDC

GND

External Relays & Digital I/O Connections

The relay and the digital I/O expansion modules PMA-11 & PMA-12 are connected to the meter using

a CAT5 cable provided with each module. The two

RJ45 connectors on the expansion modules are

identical and interchangeable; they are used to

connect additional modules to the system.

Note: The jumper located between the RJ45

connectors of the PMA-12 must be removed on the second digital I/O module in order for the system to recognize it as module #2.

• DO NOT connect or disconnect the expansion modules with the power on! More detailed instructions are provided with each optional expansion module.

Interlock Relay Feature

As the name implies, the interlock relay feature

reassigns one, or more, alarm/control relays for use

as interlock relay(s). Interlock contact(s) are wired to digital input(s) and activate the interlock relay. This feature is enabled by configuring the relay, and the

corresponding digital input(s), see Setting Up the Interlock Relay (Force On) Feature on page 27.

In the example below, an Interlock Contact switch is connected to a digital input, which will be used to force on (energize) the Interlock Relay. The Interlock

Relay and the Control Relay are connected in series with the load.

• When the Interlock Contact is closed (safe), the

Interlock Relay energizes, allowing power to flow

to the Control Relay; the corresponding front panel LED is on.

• When the Interlock Contact is open, the corresponding front panel LED flashes (locked out), the Interlock Relay is de-energized, preventing power from flowing to the Control Relay and the load.

Figure 22. Expansion Module &

DIN Rail Mounting Kit

Figure 23. External Relays Module Connections

Figure 24. Digital I/O Module Connections

Figure 25. Interlock Connections

Page 17

Series LTI Temperature Input Meter Instruction Manual

Button

Symbol

Description

LED

Status

Flashing:

Manual Flashing:

Note:

Setup and Programming

There is no need to recalibrate the meter when first received from the factory. Simply select the input type, ºF or ºC, and decimal point.

The meter is factory calibrated prior to shipment to read temperature in degrees Fahrenheit with calibration equipment that is certified to NIST standards.

Front Panel Buttons and Status LED Indicators

Overview

There are two switches, located at the back of the meter, to set the input selection for TC or RTD and for 100-ohm platinum or 10-ohm copper. The 1000-ohm RTD input uses the same setting as the 100-ohm.

Setup and programming is done using Panel Meter Pro or through the front panel buttons.

After power and input signal connections have been

completed and verified, apply power to the meter.

1-8

Alarm 1-8 indicator

Relay in manual control mode

control relays &/or analog output

Relay

interlock

switch open

Menu 1-8

Right arrow/F1

Up arrow/F2 M

Enter/F3 1-8

F4 is a digital input. Alarms 5-8 are enabled when relay expansion module is installed.

LEDs for relays in manual mode flash with the “M” LED every 10 seconds. “M” flashing by itself indicates Aout – manual control is used.

• Press the Menu button to enter or exit the Programming Mode at any time.

• Press the Right arrow button to move to the next digit during digit or decimal point programming.

• Press or hold the Up arrow button to scroll through the menus,

move the decimal point or to increment the value of a digit.

• Press the Enter button to access a menu or to accept a setting.

• Press and hold the Menu button for three seconds to access the advanced features of the meter.

Page 18

Series LTI Temperature Input Meter Instruction Manual

Display Functions & Messages

(default: PV - temperature)

Display Functions & Messages

Description

setup

Display 1

Program display 1 value

Display Functions & Messages

The meter displays various functions and messages during setup, programming, and operation. The following table shows the main menu functions and messages in the order they appear in the menu.

Display Parameter Action/Setting

setup

Input

Rtd

A385

A392

F or C

unitS

Dec pt

dsplay

Line 1

Line 2

d-Inty

RELaY

RLY 1

Act 1

Auto

A-nman

LatcH

Lt-CLr

Altern

Sanmpl

Setup Enter Setup menu

Input Enter Input selection menu

TC Set meter for thermocouple

RTD

A385

A392

F or C Press Enter to select

Units Select the display

Decimal point

Display Enter the Display menu

Line 1

Line 2 Press Enter to assign the

Display intensity

Relay Enter the Relay menu

Relay 1 Relay 1 setup

Action 1 Set relay 1 action

Automatic

Automanual

Latching Set relay for latching

Latchingcleared

Alternate Set relay for alternation

Sampling Set relay for sampling

Description

input J, K, T, E, R, S, B, N, C

Set meter for RTD input 100Pt, 1000Pt, 10Cu, 120Ni

Set meter for 0.00385 curve

Set meter for 0.00392 curve

degrees F or C

units/tags

Set decimal point dddd, dddd.d, dddd°F, dddd.dF

Press Enter to assign the upper display parameter

lower display parameter (default: engineering units)

Set display intensity level from 1 to 8

Set relay for automatic reset

Set relay for automatic & manual reset any time

operation

Set relay for latching operation with manual reset only after alarm condition has cleared

control

operation

Display Parameter Action/Setting

OFF

Set 1

RSt 1

RLY 2

FaiLSF

FLS 1

off

FLS 2

DeLAY

DLY 1

On 1

OFF 1

DLY 2

break

ignore

Off

Aout

Dis 1

Out 1

Dis 2

Out 2

reset

Rst Hi

Rst Lo

Off

Set 1 Program set point 1

Reset 1 Program reset point 1

Relay 2 Relays 2-8 setup

Fail-safe Enter Fail-safe menu

Fail-safe 1

On Enable fail-safe operation

Off Disable fail-safe operation

Fail-safe 2

Delay Enter relay Time Delay

Delay 1 Enter relay 1 time delay

On 1 Set relay 1 On time delay

Off 1 Set relay 1 Off time delay

Delay 2

Break Set relay condition if input

Ignore

On Relay goes to alarm

Off

Analog output

Output 1 Program output 1 value

Display 2 Program display 2 value

Output 2 Program output 2 value

Reset Press Enter to access the

Reset high

Reset low

Disable relay and front

panel status LED (Select

Off to enable Interlock

feature)

Note: Relays 5-8 are shown only if expansion relay module is installed

Set relay 1 fail-safe operation

Set relays 2-8 fail-safe operation

setup

Enter relays 2-8 time delay

break detected

Ignore input break

condition (Processed as an upscale condition)

condition when input break

is detected

Relay goes to non-alarm

condition when input break

is detected

Enter the Analog output scaling menu

(e.g. 4.000 mA)

(e.g. 20.000 mA)

Reset menu

Press Enter to reset max display

Press Enter to reset min display

Page 19

Series LTI Temperature Input Meter Instruction Manual

Display Functions & Messages

Description

Main Menu

Display Parameter Action/Setting

Rst HL

Contrl

Auto

nmAn

pass

Pass 1

Reset hi/low

Control Enter Control menu

Automatic

Manual

Password Enter the Password menu

Password 1 Set or enter Password 1

Press Enter to reset max & min displays

Press Enter to set meter for auto operation

Press Enter to manually control relays or analog output operation

The main menu consists of the most commonly used functions: Setup, Reset, Control, and Password.

• Press Menu button to enter Programming Mode then press the Up arrow button to scroll main menu.

• Press Menu, at any time, to exit and return to Run Mode. Changes made to settings prior to pressing Enter are not saved.

• Changes to the settings are saved to memory only after pressing Enter/F3.

• The display moves to the next menu every time a setting is accepted by pressing Enter/F3.

Pass 2

Pass 3

unloc

locd

99999

-9999

Open

Password 2 Set or enter Password 2

Password 3

Unlocked

Locked Enter password to unlock

Flashing display

Open Open sensor indication

Set or enter Password 3

Program password to lock

meter

Overrange condition Underrange condition

Page 20

Series LTI Temperature Input Meter Instruction Manual

Setting Numeric Values

The numeric values are set using the Right and Up

arrow buttons. Press Right arrow to select next digit

and Up arrow to increment digit value.

The digit being changed is displayed brighter than the

rest. Press and hold up arrow to auto-increment the display

value.

Press the Enter button, at any time, to accept a setting or Menu button to exit without saving changes.

Setting Up the Meter (setup)

The Setup menu is used to select:

1. Input type the meter will accept

2. Degrees F or C

3. Select the display units/tags

4. Decimal point position and F or C indication

5. Display parameter and intensity

6. Relay operation

7. 4-20 mA analog output scaling

Press the Enter button to access any menu or press Up arrow button to scroll through choices. Press the Menu button to exit at any time.

Setting the Input Signal (Input)

Enter the Input menu to set up the meter to accept thermocouple (tc) or RTD (rtd) inputs. The Type selector switch, located at the rear of the meter, must be set accordingly.

The thermocouple input is capable of accepting various types of thermocouples.

The RTD input is capable of accepting various types of RTD sensors. After selecting 100 Pt or 1000Pt, it is necessary to select either A385 (0.00385) or A392 (0.00392) coefficient.

Selecting the Temperature Scale (F or C)

The meter can display the temperature in degrees Fahrenheit or Celsius.

Setting the Decimal Point (dEc pt)

The temperature may be displayed with one decimal or with no decimal point. The temperature scale can

also be displayed with the reading. The degree symbol is available only with no decimal point

selected. Pressing the Up arrow scrolls the decimal point and

temperature format selections.

Page 21

Series LTI Temperature Input Meter Instruction Manual

Display

Character

Display

Character

]

[

Setting the Display Parameter & Intensity (dsplay)

Display line 1 (line 1) can be programmed to display:

1. Process value

2. Relay set points

3. Max & min values

4. Modbus input

5. Display reading and units

Display line 2 (line 2) can be programmed to display:

1. Process value

2. Relay set points

3. Max & min values

4. Engineering units or custom legends

5. Modbus input

6. Off (no display)

7. Display reading and units

Press the Up arrow to change selection, press Enter to accept setting, and press Menu to exit programming

After setting up the input and display, press the Menu

button to exit programming and skip the rest of the setup menu. Press the Menu button again and the Up

arrow to reach the Setup menu again and complete the setup of the meter.

Display Intensity (d-Inty)

The meter has eight display intensity levels to give the

best performance under various lighting conditions.

Select intensity 8 for outdoor applications. The default intensity is 6.

Setting the Display Units or Custom Tags (units)

Enter the display unit or custom tag that will be displayed if units is selected in the units menu, or d unit is selected as the Lower display parameter. See the Setting the Display Parameter & Intensity (dsplay) flow chart on page 21 to access the display menu to show the unit or tag on the Lower display. The

engineering units or custom legends can be set using

the following 7-segment character set:

0 1 2 3 4 5 6 7 8 9 A b C c d e f g 9 H h I I j

Notes: Degree symbol represented by (<) if programming with

Panel Meter Pro. The letters “m” and “w” use two 7-segment LEDs each;

when selected the characters to the right are shifted one position.

Press and hold up arrow to auto-scroll the characters in the display.

n m

o p q

r s

t u

v uw

x y

/ [ ]

= !

Degree(<)

Space

Page 22

Series LTI Temperature Input Meter Instruction Manual

Setting the Relay Operation (

relay)

This menu is used to set up the operation of the relays.

• During setup, the relays do not follow the input and they will remain in the state found prior to entering the Relay menu.

1. Relay action

a. Automatic reset only (non-latching) b. Automatic + manual reset at any time

(non-latching) c. Latching (manual reset only) d. Latching with Clear (manual reset only

after alarm condition has cleared) e. Relay alternation control (automatic

reset only) f. Sampling (the relay is activated for a

user-specified time) g. Off (relay disabled and Interlock feature

enabled)

2. Set point

3. Reset point

4. Fail-safe operation

a. On (enabled) b. Off (disabled)

5. Time delay a. On delay (0-999.9 seconds) b. Off delay (0-999.9 seconds)

6. Relay action for loss (break) of input (ignore, on, off)

Setting the Relay Action

Operation of the relays is programmed in the Action

menu. The relays may be set up for any of the

following modes of operation:

1. Automatic reset (non-latching)

2. Automatic + manual reset at any time (non-

latching)

3. Latching (manual reset only, at any time)

4. Latching with Clear (manual reset only after alarm condition has cleared)

5. Relay alternation control (automatic reset only)

6. Sampling (the relay is activated for a userspecified time)

7. Off (relay disabled and Interlock feature enabled)

The following graphic shows relay 1 action setup; relay 2-8 are set up in a similar fashion.

Page 23

Series LTI Temperature Input Meter Instruction Manual

Programming Set and Reset Points

High alarm indication: program set point above reset point.

Low alarm indication: program set point below reset

point.

The deadband is determined by the difference between set and reset points. Minimum deadband is

one display count. If the set and reset points are programmed with the same value, the relay will reset one count below the set point.

Note: Changes are not saved until the reset point has been accepted.

Setting Fail-Safe Operation

In fail-safe mode of operation, the relay coil is energized when the process variable is within safe limits and the relay coil is de-energized when the alarm condition exists. The fail-safe operation is set independently for each relay. Select

off to disable fail-safe operation.

select

on to enable or

Programming Time Delay

The On and Off time delays may be programmed for each relay between 0 and 999.9 seconds. The relays will transfer only after the condition has been

maintained for the corresponding time delay. The On time delay is associated with the set point. The Off time delay is associated with the reset point.

Relay Action for Loss of Input (Input Break)

Each relay may be programmed to go to one of the

following conditions when the meter detects the loss of the input signal:

1. Turn On (Go to alarm condition)

2. Turn Off (Go to non-alarm condition)

3. Ignore (Processed as an upscale condition)

Relay and Alarm Operation Diagrams

The following graphs illustrate the operation of the relays, status LEDs, and ACK button.

High Alarm Operation (Set > Reset)

For Manual reset mode, ACK can be pressed anytime to turn "off" relay. To detect a new alarm condition, the signal must go below the set point, and then go above it.

Low Alarm Operation (Set < Reset)

For Manual reset mode, ACK can be pressed anytime to turn "off" relay. For relay to turn back “on”, signal must go above set point and then go below it.

Page 24

Series LTI Temperature Input Meter Instruction Manual

High Alarm with Fail-Safe Operation (Set > Reset)

Relay Sampling Operation

When the signal crosses the set point, the relay trips and the sample time starts. After the sample time has elapsed, the relay resets. The cycle repeats every time the set point is crossed, going up for high alarms and going down for low alarms.

The sample time can be programmed between 0.1 and 5999.9 seconds.

Signal Loss or Input Break Relay Operation

The following graph shows the input break relay operation for a high alarm relay.

Note: Relay coil is energized in non-alarm condition. In case of power failure, relay will go to alarm state.

Low Alarm with Fail-Safe Operation (Set < Reset)

When the meter detects a break in the input, the relay will go to one of the following selected actions:

1. Turn On (Go to alarm condition)

2. Turn Off (Go to non-alarm condition)

3. Ignore (Processed as an upscale condition)

Note: Relay coil is energized in non-alarm condition. In case of power failure, relay will go to alarm state.

Page 25

Series LTI Temperature Input Meter Instruction Manual

Alarm #

HI or LO

Set

Reset

Power-

Relay &

1000

500

499

Off 2 LO

700

900

499

On 3 LO

250

400

499

Off 4 HI

450

200

499

Fail-Safe

Non-Alarm State

Alarm State

Power NO

Off

Open

Closed

Open

Relays On

Closed

Open

Closed

Relays

Time Delay Operation

The following graphs show the operation of the time delay function.

When the signal crosses the set point, the On time delay timer starts and the relay trips when the time

delay has elapsed. If the signal drops below the set point (high alarm) before the time delay has elapsed,

the On time delay timer resets and the relay does not change state. The same principle applies to the Off time delay.

Note: If “Automatic or Manual (A-nmAn)” reset mode is

selected, the LED follows the reset point and not the relay state when the relay is acknowledged.

Relay Operation Details

Overview

The relay capabilities of the meter expand its usefulness beyond simple indication to provide users with alarm and control functions. These capabilities

include front panel alarm status LEDs as well as either 2 or 4 optional internal relays and/or 4 external relays expansion module. Typical applications include high or low temperature alarms, control applications such as simple on/off temperature control. There are four basic ways the relays can be used:

1. High or Low Alarms with Latching or NonLatching Relays

2. Simple On/Off Control with 100% Adjustable

Deadband

3. Sampling (Based on Time)

4. Relay Alternation Control

Relays Auto Initialization

When power is applied to the meter, the front panel LEDs and alarm relays will reflect the state of the

input to the meter. The following table indicates how

the alarm LEDs and relays will react on power-up based on the set and reset points:

Alarm

Fail-Safe Operation

The following table indicates how the relays behave based on the fail-safe selection for each relay:

Point

Reading

LED

Selection

Failure

go to nonalarm state

go to alarm state

Note: NO = Normally Open, NC = Normally Closed.

This refers to the condition of the relay contacts when the power to the meter is off.

Page 26

Series LTI Temperature Input Meter Instruction Manual

LED

Status

LED

Status

Alarm 1

Alarm 5

Alarm 2

Alarm 6

Alarm 3

Alarm 7

Alarm 4

8 Alarm 8

Relay terminology for following tables

Terminology

Relay Condition

Alarm (Tripped)

Off

Normal (Reset)

Ack

Acknowledged

Automatic reset only

Condition

LED

Relay

Normal

Off

Alarm

Ack (No effect)

Normal

Off

Condition

LED

Relay

Normal

Off

Alarm

Normal

Off

Next Alarm

Ack

Off

Normal

Off

Manual reset any time

Condition

LED

Relay

Normal

Off

Alarm

Ack

Off

Front Panel LEDs

The LEDs on the front panel provide status indication for the following:

The meter is supplied with four alarm points that include front panel LEDs to indicate alarm conditions. This standard feature is particularly useful for alarm

applications that require visual-only indication. The LEDs are controlled by the set and reset points programmed by the user. When the display reaches a

set point for a high or low alarm, the corresponding alarm LED will turn on. When the display returns to the reset point the LED will go off. The front panel LEDs respond differently for latching and non-latching relays.

For non-latching relays, the LED is always off during normal condition and always on during alarm condition, regardless of the state of the relay (e.g. Relay acknowledged after alarm condition).

For latching relays, the alarm LEDs reflect the status of the relays, regardless of the alarm condition. The

following tables illustrate how the alarm LEDs function in relation to the relays and the acknowledge button (Default: F3 key assigned to ACK).

Latching and Non-Latching Relay Operation

The relays can be set up for latching (manual reset)

or non-latching (automatic reset) operation.

Non-Latching Relay (Auto)

In this application, the meter is set up for automatic reset (non-latching relay). Acknowledging the alarm while it is still present has no effect on either the LED or the relay. When the alarm finally goes away, the relay automatically resets and the LED also goes off.

Non-Latching Relay with Manual Reset (A-nman)

In this application, the meter is set up for automatic and manual reset at any time (non-latching relay). The LED and the relay automatically reset when the meter returns to the normal condition.

In addition, the relay can be manually reset while the alarm condition still exists, but the LED will stay on

until the meter returns to the normal condition.

Automatic + manual reset at any time

Latching Relay (LatcH)

In this application, the meter is set up for manual

reset at any time. Acknowledging the alarm even if

the alarm condition is still present resets the relay and turns off the LED.

The On and Off terminology does not refer to the status of the relay’s coil, which depends on the failsafe mode selected.

• In latching relay mode, if Fail-Safe is off, latched relays will reset (unlatch) when power is cycled.

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Series LTI Temperature Input Meter Instruction Manual

Manual reset only after

alarm condition has cleared

Condition

LED

Relay

Normal

Off

Alarm

Ack (No effect)

Normal

Ack

Off

1 2 3 4 5 6

+5 I1 I2 I3 I4 O1

7 8

O2 O3

9 10

O4 G

DI 1-4 DO 1-4

5 VDC

GND

SW2

SW1

Latching Relay with Clear (Lt-Clr)

In this application, the meter is set up for manual reset only after the signal passes the reset point

(alarm condition has cleared). Acknowledging the

alarm while it is still present has no effect on either the LED or the relay. When the alarm is acknowledged after it returns to the normal state, the LED and the relay go off. Notice that the LED remains on, even after the meter returns to the normal

condition. This is because, for latching relays, the

alarm LED reflects the status of the relay, regardless of the alarm condition.

Acknowledging Relays

There are three ways to acknowledge relays programmed for manual reset:

1. Via the programmable front panel function keys F1-F3 (Example: F3 assigned to ACK).

Setting Up the Interlock Relay (Force On) Feature

Relays 1-4 can be set up as interlock relays. To set up the relays for the interlock feature:

1. Access the Setup – Relay – Action menu and set the action to off.

2. In the Advanced features – User menu program

any of the digital inputs to Force On any of the internal relays (1-4).

3. Connect a switch or dry contact between the +5V

terminal and the corresponding digital input (dI-1 to dI-4) terminal.

2. Remotely via a normally open pushbutton wired

to the F4 terminal at the rear of the instrument.

3. One of the digital inputs and the +5 V terminals

on the digital I/O expansion module.

When the ACK button or the assigned digital input is

closed, all relays programmed for manual reset are acknowledged.

Interlock Relay Operation

Relays 1 & 2 are configured to energize (their front panel LEDs are steady on) when SW1 & SW2 switches (above) are closed. If the contacts to these digital inputs are opened, the corresponding front panel LEDs flash indicating this condition. The

processes being controlled by the interlock relay will

stop, and will re-start only after the interlock relay is re-activated by the digital inputs (switches).

Note: If multiple digital inputs are assigned to the same relay, then the corresponding logic is (AND) – i.e. both switches must be closed to activate the relay.

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Series LTI Temperature Input Meter Instruction Manual

Scaling the 4-20 mA Analog Output (

The 4-20 mA analog output can be scaled to provide a 4-20 mA signal for any display range selected.

No equipment is needed to scale the analog output;

simply program the display values to the corresponding mA output signal.

The Analog Output menu is used to program the 4-20 mA output based on display values.

Note: During the analog output scaling, the display

For instructions on how to program numeric values

Aout)

value is always indicated with a decimal point regardless of the decimal point selection for the temperature display.

see Setting Numeric Values, page 20.

Reset Menu (reset)

The Reset menu is used to reset the maximum or

minimum reading (peak or valley) reached by the process; both may be reset at the same time by

selecting “reset high & low” (rst HL).

Manual Control Menu (Contrl)

The Manual Control menu is used to control the 4-20 mA analog output and the relays manually, ignoring the input. Each relay and analog output can

be programmed independently for manual control.

Selecting automatic control sets all relays and analog output for automatic operation.

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Series LTI Temperature Input Meter Instruction Manual

Setting Up the Password (pass)

The Password menu is used for programming three levels of security to prevent unauthorized changes to the programmed parameter settings.

Pass 1: Allows use of function keys and digital

inputs Pass 2: Allows use of function keys, digital inputs and editing set/reset points

Pass 3: Restricts all programming, function keys,

and digital inputs.

Protecting or Locking the Meter

Enter the Password menu and program a six-digit password.

For instructions on how to program numeric values see Setting Numeric Values, page 20.

Making Changes to a Password Protected Meter

If the meter is password protected, the meter will display the message Locd (Locked) when the Menu button is pressed. Press the Enter button while the message is being displayed and enter the correct password to gain access to the menu.

Disabling Password Protection

To disable the password protection, access the

Password menu and enter the correct password

twice, as shown below. The meter is now unprotected until a new password is entered.

If the correct six-digit password is entered, the meter displays the message unLoc (unlocked) and the

protection is disabled until a new password is

programmed. If the password entered is incorrect, the meter

displays the message Locd (Locked) for about two seconds, and then it returns to Run Mode. To try again, press Enter while the Locked message is displayed.

Did you forget the password?

The password may be disabled by entering a

master password once. If you are authorized to

make changes, enter the master password 508655 to unlock the meter.

Note: After exiting the programming mode, the meter returns to its password protected condition

Page 30

Series LTI Temperature Input Meter Instruction Manual

for display variables

loop break detected

(digital input)

Advanced Features Menu

To simplify the setup process, functions not needed for most applications are located in the Advanced Features menu.

Press and hold the Menu button for three seconds to access the advanced features of the meter.

Display Parameter Action/Setting

t-byt

SelEct

AoutPr

Source

O-rang

u-rang

Break

Time byte Set byte-to-byte

Select Enter the Select menu

Analog output programmin g

Source Select source for the

Overrange Program mA output for

Underrange Program mA output for

Loop Break

timeout

Program analog output parameters

4-20 mA output

display overrange

display underrange

Set relay condition if

Advanced Features Menu & Display Messages

The following table shows the functions and

messages of the Advanced Features menu in the order they appear in the menu.

Display Parameter Action/Setting

Adjust

T cal

T lo

T Hi

rtdtot

filtEr

bypASs

Round

seriAl

SlaV Id

baud

Tr dLY

Parity

Adjust

T Cal Enter temperature

T Low

T High Apply the high

RTD Total

Filter Set noise filter value

Bypass Set filter bypass value

Round

Serial Set serial

Slave ID Set slave ID or meter

Baud rate Select baud rate

Transmit delay

Parity Select parity

Set adjust value to

offset temperature reading

calibration menu

Apply the low temperature input (e.g. 32°F)

temperature input (e.g. 1000°F)

Set the number of

RTDs connected in

parallel to obtain

average temperature

Set the rounding value

communication parameters

address

Set transmit delay for serial communication

Even, Odd, or None with 1 or 2 stop bits

nmAx

nmin

Calib

4 nmA

20 nmA

user

dI I

dO 1

ICal

nmref

0nmV

Maximum Program maximum mA

Minimum Program minimum mA

Calibrate Calibrate 4-20 mA

4 mA output

20 mA output

User I/O

F1 function key

F2 function key

F3 function key

F4 function

Digital input 1 Assign digital input

Digital output 1 Assign digital output

Internal temp calibration

Measured temp reference

0 mV Apply 0.000 mV input

output allowed

output (internal reference source used for scaling the output)

Enter mA output value

read by milliamp meter

with at least 0.001 mA resolution

Enter mA output value

read by milliamp meter

with at least 0.001 mA resolution

Assign function keys

and digital I/O

Assign F1 function key

Assign F2 function key

Assign F3 function key

Assign F4 function

1- 8, if expansion modules are connected

Enter internal temperature calibration (used for factory calibration only)

Enter the measured reference temperature in degrees Celsius (e.g. 25.0)

Internal Calibration

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Series LTI Temperature Input Meter Instruction Manual

Type of input

Input 1 (Low)

Input 2 (High)

Check (Middle)

Type J

32°F

1184°F

600°F

Type K

32°F

1895°F

960°F

Type T

32°F

698°F

360°F

Type E

32°F

1652°F

800°F

Type R

32°F

3110°F

1500°F

Type S

32°F

3110°F

1500°F

Type B

32°F

3110°F

1500°F

Type N

32°F

1472°F

700°F

Type C

500°F

3650°F

1800°F

10 Ω Cu RTD

32°F

9.035Ω

450°F

18.032Ω

200°F

12.639Ω

100 Ω Pt RTD (0.00385)

32°F

100Ω

1148°F

320.12Ω

590°F

215.61Ω

100 Ω Pt RTD (0.00392)

32°F

100Ω

1148°F

324.49Ω

590°F

217.89Ω

120 Ω Ni RTD

32°F

410°F

221°F

1000 Ω Pt

32°F

1000Ω

900°F

2750.4Ω

450°F

1876.5Ω

1000 Ω Pt

32°F

1000Ω

900°F

2785.1Ω

450°F

1893.7Ω

Display Parameter Action/Setting

100nmV

Diag

LED t

Info

Erase

100 mV Apply 100.000 mV

input

Diagnostics Display parameter

settings

LED test Test all LEDs

(press menu to exit test)

Information Display software

number and version

Erase Erase Panel Meter Pro

software stored in meter’s memory

Offset Adjust (Adjust)

This parameter allows the user to select an offset

adjustment to the temperature being displayed. Offset adjustment values can be either positive or negative and can be any number within ±50.0°F (+27.8°C). The offset adjustment value is programmed through the

Adjust menu.

The offset adjustment feature can be useful to compensate for errors due to thermocouple junctions or

excessive lead wire resistance in RTDs.

Note: The offset adjustment value is not reset to zero

when the type of temperature sensor is changed (i.e. TC type or RTD curve). Celsius/Fahrenheit conversion must be made manually by the user.

Recalibration of the Meter (t CAL)

The Calibration (t CAL) menu is used to recalibrate the thermocouple and RTD inputs.

• There is no need to recalibrate the meter

when first received from the factory. Simply select the input type, ºF or ºC, and decimal point.

• The meter is factory calibrated prior to

shipment to read temperature in degrees Fahrenheit with calibration equipment that is certified to NIST standards.

• Check calibration of the meter at least every

12 months.

Allow at least 30 minutes warm-up time before performing recalibration procedure to ensure specified accuracy.

Recommended Calibration Points

To recalibrate the meter, it is recommended to use

the Fahrenheit scale; this will give a greater degree of

accuracy to the calibration. The scale can be changed to the Celsius scale after calibration is completed. The

meter will display temperature accurately in any scale.

The following table shows the recommended low and high calibration points for all types.

120Ω

RTD (0.00385)

RTD (0.00392)

315.31Ω

205.22Ω

Recalibration Procedure

1. Connect signal to the meter using the appropriate

wire (e.g. type J thermocouple wire to recalibrate

type J input). See Signal Connections on page

14.

2. Set up the meter to accept the selected input (e.g. type J T/C). See Setting Up the Meter (setup) on page 20.

3. Set up the meter to display temperature in degrees Fahrenheit.

4. Apply signal corresponding to input 1 (32°F) and program the display to read 32.0.

5. Apply signal corresponding to input 2 (1184°F for type J) and program the display accordingly.

6. After the meter accepts input 2, the display returns to reading mode. This completes the recalibration procedure for the selected input.

Noise Filter (filter)

The noise filter is available for unusually noisy signals that cause an unstable process variable display. The

noise filter averages the input signal over a certain period. The filter level determines the length of time over which the signal is averaged. The filter level can be set between 2 and 199. The higher the filter level, the longer the averaging time and so the longer it

takes the display to settle to its final value. Setting the filter level to zero disables the filter function.

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Series LTI Temperature Input Meter Instruction Manual

Noise Filter Bypass (bypass)

The noise filter bypass changes the behavior of the

meter so that small variations in the signal are filtered

out but large abrupt changes in the input signal are displayed immediately. The bypass value determines the minimum amount of signal change to be displayed

immediately. All signal changes smaller than the

bypass value are filtered or averaged by the meter. The noise filter bypass may be set between 0.1 and

99.9% of full scale.

Rounding Feature (round)

The rounding feature is used to give the user a steadier display with fluctuating signals. Rounding is used in addition to the filter function.

Rounding causes the display to round to the nearest value according to the rounding selected. This setting affects the last two digits, regardless of decimal point position. On this LTI model, the valid settings are 1, 2, 5, and 10 (only).

Modbus RTU Serial Communications (serial)

The meter is equipped with serial communications capability as a standard feature using the Modbus

RTU Serial Communication Protocol.

The meter may be connected to a PC for initial configuration via the onboard micro USB connection.

For ongoing digital communications with a computer or other data terminal equipment, an RS-232, or RS-485 option is required; see Ordering Information on page 6 for details.

• DO NOT connect any equipment other than Dwyer Instruments’ expansion modules, cables, or meters to the RJ45 M LINK connector.

Otherwise damage will occur to the equipment

and the meter.

Note: More detailed instructions are provided with

each optional serial communications adapter.

Note: Refer to the LTI Modbus Register Tables

located at www.dwyer-inst.com for details.

Select Menu (SElect)

The Select menu is used to program the analog output parameters. There are no other selections for this model.

Analog Output Programming (AoutPr)

The Analog Output Programming menu is used to program the behavior of the 4-20 mA output. The following parameters and functions are programmed in this menu:

1. Source: Source for generating the 4-20 mA output (e.g. PV - temperature)

2. Overrange: Analog output value with display in overrange condition

3. Underrange: Analog output value with display in underrange condition

4. Break: Analog output value when input break is detected

5. Max: Maximum analog output value allowed regardless of input

6. Min: Minimum analog output value allowed regardless of input

7. Calibrate: Calibrate the internal 4-20 mA source reference used to scale the 4-20 mA output

Analog Output Source

The source for generating the 4-20 mA output may be assigned to the process variable, maximum or

minimum value reached by the process, one of the

set points, or the Modbus PV input.

When using more than one meter in a multi-drop mode, each meter must be have its own unique Slave ID or meter address. The ID or address may be programmed between 1 and 247. The transmit delay

may be set between 0 and 199 ms. The parity can be set to even, odd, or none with 1 or 2 stop bits.

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Series LTI Temperature Input Meter Instruction Manual

Display

Description

Reset the stored maximum display value

Reset the stored minimum display value

Reset the stored maximum & minimum display values

Capture tare and zero the display

Reset captured tare and resume normal operation

Directly access the relay menu

Directly access the set point menu for relay 1 (*through 8)

Disable all relays until a button assigned to

Enable all relays to function as they have been programmed

Hold current relay states as they are until a

pressed

Hold the current display value momentarily

calculated in the background.

Display maximum display value on line 1

Display minimum display value on line 1

Display maximum & minimum display values on line 1

Display maximum display value on line 2

Display minimum display value on line 2

Display maximum & minimum display values on line 2

Force relay 1 (*through 4) into the on state.

details about interlock relays.

Directly access the control menu

Disable the selected function key or digital

I/O

Acknowledge all active relays that are in a

manual or latching

Directly access the reset menu

Mimic the menu button functionality (digital

inputs only)

Mimic the right arrow/F1 button functionality

(digital inputs only)

Mimic the up arrow/F2 button functionality (digital inputs only)

Mimic the enter/F3 button functionality

(digital inputs only)

has been triggered (digital outputs only)

*If installed

Analog Output Calibration

To perform the analog output calibration, it is recommended to use a milliamp meter with a resolution of at least 0.1 µA to measure the output current. The values saved internally during this procedure are used for scaling the 4-20 mA output in the Setup menu.

Analog Output Calibration Procedure

1. Wire the LTI 4-20 mA output to a current loop that includes a power supply (internal or external 12 to 24 VDC), and the mA input on the digital meter. See Figure 20. 4-20 mA Output Connections on page 15 for details.

2. Turn on all devices. Allow for a 15 to 30 minute warm-up.

3. Go to the Advanced Features menu, and navigate to the Analog Output Programming (AoutPr)/Calibration (Calib) menu and press Enter.

4. The display will show 4 nmA. The LTI mA output

should now be close to 4 mA. Press Enter and

the display will show 04.000. Enter the actual

value read by the digital mA meter and press

Enter.

5. The display will show 20 nmA. The LTI mA output should now be close to 20 mA. Press Enter and the display will show 20.000. Enter the actual

value read by the digital mA meter and press

Enter.

6. The meter will now calculate the calibration factors and store them.

7. Press Menu to exit and return to Run mode.

Programmable Function Keys User Menu (user)

The User menu allows the user to assign the front

panel function keys F1, F2, and F3, the digital input

F4 (a digital input located on the input signal connector), and up to eight additional digital inputs to access most of the menus or to activate certain functions immediately (e.g. reset max & min, hold

relay states, etc.). This allows the meter to be greatly

customized for use in specialized applications.

Up to eight digital outputs can be assigned to a number of actions and functions executed by the

meter (i.e. alarms, relay acknowledgement, reset max, min, or max & min, tare, and reset tare). The

digital outputs can be used to trigger external alarms

or lights to indicate these specific events.

Function Keys & Digital I/O Available Settings

Refer to the following table for descriptions of each available function key or digital I/O setting.

Rst Hi Rst Lo Rst HL

tare Rst tr

relay Set 1*

Rly d

Rly E

O Hold

d Hold

Ln1 Hi Ln1 Lo Ln1 HL

Ln2 Hi Ln2 Lo Ln2 HL

F On 1*

Contrl disabl

AcH

Reset nmenu

rigHt

Enter

enable relays (Rly E) is pressed

button assigned to enable relays (Rly E) is

while the function key or digital input is active. The process value will continue to be

This function is used in conjunction with a

digital input expansion module to achieve

interlock functionality. See page

manual operation mode such as auto-

27 for

Alnm 1*

Provide indication when alarm 1 (*through 8)

Page 34

Series LTI Temperature Input Meter Instruction Manual

Notes:

1. If meter is in operation and it is intended to

Internal Temperature Calibration (ICAL)

The meter is factory calibrated prior to shipment to read temperature in degrees Fahrenheit with calibration equipment that is certified to NIST standards.

The Internal Calibration (ICAL) is a function used at the factory to calibrate all the thermocouple and RTD ranges. This procedure should only be used by

qualified personnel. To recalibrate the meter for a specific input and

range, refer to Recalibration of the Meter (t CAL) on page 31.

accept only one input type (e.g. 100 Pt), recalibration of other inputs is not necessary.

2. Allow the meter to warm up for at least 30 minutes before performing the calibration procedure.

3. Use the Recalibration of the Meter (t CAL) procedure on page 31.

The Internal calibration menu is part of the Advanced Features menu and is described in the following

pages. This procedure should only be used by qualified personnel.

Note: Most users should not require the use of the

Internal Calibration procedure. The T CAL procedure should be used instead of the ICAL procedure.

Thermocouple Input Internal Calibration (ICAL)

1. Set the Type selector switch in the TC position and using copper wire connect a precision mV calibrator to the input.

2. In the Setup menu select the input: TC – Type J.

3. Press and hold the Menu button for three seconds to access the advanced features of the meter.

4. Press the Up arrow button to scroll to the Internal calibration menu (ICAL) and press Enter.

5. The meter displays either current calibration (nmref). Press Enter to start the calibration process.

6. Measure the room temperature in degrees Celsius using a reliable reference, enter the room temperature (e.g. 25.0), and press Enter.

7. The meter displays 0mv, apply an input equal to

0.000 mV and press Enter. The display flashes while accepting the 0 mV input; press Enter again when the display stops flashing.

8. The meter displays 100mv, apply an input equal to 100.000 mV and press Enter. The display flashes while accepting the 100 mV input; press Enter again when the display stops flashing.

9. Apply 0 mV, the meter should read room temperature.

10. This completes the calibration of all the thermocouple ranges.

RTD Input Internal Calibration (ICAL)

1. Set the Type selector switch in the RTD position and the Range switch in the 10 position. Using 3 wires connect a precision calibrator resistance output to the meter.

2. In the Setup menu select the input: RTD – 100 Pt – A385.

3. Access the Advanced Features menu and scroll to the ICAL menu and press Enter.

4. The meter displays the message (10 lo). Apply

9.035 ohm and press Enter. The display flashes for a moment while the meter is accepting the low input signal for the 10-ohm RTD. After the display stops flashing, press Enter again.

5. The meter displays the message (10 Hi). Apply

18.032 ohm and press Enter. The display flashes for a moment while the meter is accepting the high input signal for the 10-ohm RTD. After the display stops flashing, press Enter again.

6. The meter displays the message (100 lo). Do NOT press Enter.

7. Move the Range selector switch to the 100 position. Apply 100 ohm and press Enter. The display flashes for a moment while the meter is accepting the low input signal for the 100-ohm RTD.

8. The meter displays the message (100 Hi). Apply

320.12 ohm and press Enter. The display flashes for a moment while the meter is accepting the high input signal for the 100-ohm RTD.

9. At the end of the calibration process the meter should read 1148.0F with the 320.12-ohm input applied.

10. This completes the calibration of all the RTD ranges.

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Series LTI Temperature Input Meter Instruction Manual

Meter Operation

The meter is capable of accepting a variety of thermocouples and RTDs.

The dual-line display can be customized by the user to operate in such a way as to satisfy a specific application. Typically, display line 1 is used for the process variable; while line 2 is used engineering units, custom legend, or set point indication.

Additionally, the meter can be set up to display the thermocouple or RTD input on line 1 and the Modbus input on line 2. The relays and analog output can be programmed to operate from the Modbus PV input.

Front Panel Buttons Operation

Button Symbol

Description

Press to enter or exit Programming Mode, view settings, or exit max/min readings

Press to reset max/min readings or other parameter/function assigned through the User menu

Press to display max/min readings or other parameter/function assigned through the User menu

Press to acknowledge relays or other

parameters/function assigned through the User menu

Maximum/Minimum Readings

The max & min readings (peak & valley) reached by the process can be displayed either continuously or

momentary:

1. Display briefly by assigning to the F1-F3

function keys or to the digital inputs in the

User menu.

2. Display continuously by assigning either

display to max/min through the Display menu.

Any of the F1-F3 function keys (buttons) and the

digital inputs can be programmed to reset the max &

min readings. The meters are set at the factory to

display the max reading by pressing the Up arrow/F2 button and to use the Right arrow/F1 button to access

the Reset menu.

To display max reading using function key with factory defaults:

1. Press Up arrow/F2 button to display maximum reading since the last reset/power-up.

2. To reset max/min press Right arrow/F1 button to access the Reset menu. The max & min displays are reset to actual values.

3. Press Menu to exit max/min display reading.

To display max/min readings continuously:

Assign either display to Max (d Hi), Min (d Lo), or toggle between Max and Min (d HL) every 10 seconds.

Function Keys Operation

During operation, the programmable function keys operate according to the way they have been

programmed in the Advanced Features – User menu. See Programmable Function Keys User Menu (user) on page 33 for details.

The table above shows the factory default settings for F1, F2, and F3.

F4 Operation

A digital input, F4, is standard on the meter. This

digital input is programmed identically to function keys

F1, F2, and F3. The input is triggered with a contact closure to COM, or with an active low signal. During operation, F4 operates according to the way it has been programmed in the Advanced Features – User menu. See Programmable Function Keys User Menu (user) on page 33 for details.

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Series LTI Temperature Input Meter Instruction Manual

Troubleshooting

The rugged design and the user-friendly interface of

the meter should make it unusual for the installer or

operator to refer to this section of the manual. However, due to the many features and functions of

the meter, it’s possible that the setup of the meter

does not agree with what an operator expects to see.

If the meter is not working as expected, refer to the Diagnostics menu and recommendations below.

Diagnostics Menu (diag)

The Diagnostics menu is located in the Advanced Features menu, to access Diagnostics menu see Advanced Features Menu on page 30.

This menu allows the user to test the functionality of

all the meter LEDs, check the meter’s software and

version information, and erase the Panel Meter Pro software installation files from the meter. Press the Enter button to view the settings and the Menu button to exit at any time.

For a description of the diagnostic messages, see Advanced Features Menu & Display Messages on page 30.

Reset Meter to Factory Defaults

When the parameters have been changed in a way

that is difficult to determine what’s happening, it might

be better to start the setup process from the factory

defaults.

Instructions to load factory defaults:

1. Enter the Advanced Features menu. See Advanced Features Menu, page 30.

2. Press Up arrow to go to Diagnostics (diAG) menu

3. Press and hold Right arrow for three seconds, press Enter when display flashes reset. Note: If Enter is not pressed within three seconds, the display returns to the Diagnostics menu.

4. The meter goes through an initialization sequence (similar as on power-up) and loads the factory default settings.

Determining Software Version

To determine the software version of a meter:

1. Go to the Diagnostics menu (diAG) and

press Enter button.

2. Press Up arrow button and scroll to

Information menu (Info).

3. Press Enter to access the software number

(SFT) and version (UER) information. Write down the information as it is displayed. Continue pressing Enter until all the information is displayed.

4. The meter returns to Run Mode after displaying all the settings.

Page 37

Series LTI Temperature Input Meter Instruction Manual

Parameter

Display

Default Setting

Round

Display line 2

Eng units: Temp

On delay relay 2

0.0 sec

Parameter

Display

Default Setting

Factory Defaults & User Settings

The following table shows the factory setting for most of the programmable parameters on the meter.

Input type

Temp scale

Adjust

RTD total

Filter

Bypass

Decimal point

Display line 1

Display intensity

Relay 1 action

Relay 1 set point

Relay 1 reset point

Relay 2 action

Relay 2 set point

Relay 2 reset point

Relay 3 action

Relay 3 set point

Relay 3 reset point

Relay 4 action

Relay 4 set point

Relay 4 reset point

Fail-safe relay 1

Fail-safe relay 2

Fail-safe relay 3

Fail-safe relay 4

On delay relay 1

Off delay relay 1

Off delay relay 2

On delay relay 3

Off delay relay 3

On delay relay 4

Input

F or C

Adjust

rtdtot

filter

bypass

Round

dddd

Line 1

Line 2

d-Inty

Act 1

Set 1

RSt 1

Act 2

Set 2

RSt 2

Act 3

Set 3

RSt 3

Act 4

Set 4

RSt 4

Fls 1

Fls 2

Fls 3

Fls 4

On 1

Off 1

On 2

Off 2

On 3

Off 3

On 4

Type J TC

°F

0.0

0.2

No decimal

PV: Temperature

Automatic

100

Automatic

200

150

Automatic

300

250

Automatic

400

350

Off

0.0 sec

Off delay relay 4

Input break relay 1

Input break relay 2

Input break relay 3

Input break relay 4

Display 1 analog out

Output 1 value

Display 2 analog out

Output 2 value

Source analog output

Overrange output

Underrange output

Input break output

Maximum output

Minimum output

Slave ID

Baud rate

Transmit delay

Parity

Byte-to-byte timeout

F1 function key

F2 function key

F3 function key

F4 function

Digital input 1

Digital input 2

Digital input 3

Digital input 4

Digital output 1

Digital output 2

Digital output 3

Digital output 4

Password 1

Password 2

Password 3

Off 4

ignore

Dis 1

Out 1

Dis 2

Out 2

Source

O-rang

u-rang

break

nmAx

nmin

SlavId

baud

Tr dly

Parity

t-byt

dI 1

dI 2

dI 3

dI 4

dO 1

dO 2

dO 3

dO 4

Pass 1

Pass 2

Pass 3

0.0 sec

Ignore

0.0

4.000 mA

2000.0

20.000 mA

Process Variable

21.000 mA

3.000 mA

1.000 mA

23.000 mA

1.000 mA

247

9600

10 ms

Even

010 (0.1 sec)

Reset max & min

Line 1: Max (Hi)

Acknowledge relays

Right arrow

Up arrow

Enter

Alarm 1

Alarm 2

Alarm 3

Alarm 4

000000 (unlocked)

Page 38

Series LTI Temperature Input Meter Instruction Manual

Symptom

Check/Action

No display at all

Check power at power connector

Not able to change setup or

programming,

is displayed

Meter is password-protected, enter correct six-digit password to

Meter displays error message during

Check:

3. Input selected in Setup menu

Meter displays

Check: Display is unstable

Check:

2. Filter and bypass values (increase)

Display response is too slow

Check filter and bypass values

Display reading is not accurate

Check:

2. Input selection in Setup menu

Display does not respond to input

Check:

point.

Display alternates between

2. Lo and a number

Press Menu to exit max/min display readings.

Relay operation is reversed

Check:

2. Wiring of relay contacts

Relay and status LED do not

Check:

2. Set and reset points

Flashing relay status LEDs

Relays in manual control mode or relay interlock switches opened.

Meter not communicating with

Check:

3. Meter address and baud rate

If the display locks up or the meter does

not respond at all

Cycle the power to reboot the Other symptoms not described above

Call Technical Support for assistance.

Troubleshooting Tips

This meter is a highly sophisticated instrument with an extensive list of features and capabilities. If the front panel buttons are used to program the meter, it may be a difficult task to keep everything straight. That is why we strongly

recommend the use of the free Panel Meter Pro software for all programming activities. A cable is provided with the meter for programming with Panel Meter Pro software.

If you have programmed the meter with the front panel buttons and it is not working as intended, try re-programming the meter using Panel Meter Pro software.

Locd

calibration (Error)

1. 99999

-9999

changes, reading a fixed number

1. Hi and a number

respond to signal

unlock

1. Signal connections

2. Type and range selector switches

1. Input selected in Setup menu

2. Corresponding signal at Signal connector

1. Input signal stability and value

1. TC wire type

1. Display assignment, it might be displaying max, min, or set

1. Fail-safe in Setup menu

1. Relay action in Setup menu

application programs

Note: Certain sequences of events can cause unexpected results. To solve these issues, it is best to start fresh from factory defaults and use the manual as a step by step programming guide, rather than a random approach to programming. To reset the meter to factory defaults, see Reset Meter to Factory Defaults on page 36. In addition, for best results, we recommend using the free Panel Meter Pro software for all programming needs.

1. Serial adapter and cable

2. Serial settings

microprocessor.

Page 39

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, IN 46360, U.S.A.

Fax: 219/872-9057

e-mail: [email protected]

07/20

Phone: 219/879-8000

dwyer-inst.com

LIM7000DW_G

SFT063 Ver 4.000 & up