Tek-Trol Tek-LCD 7802A Manuale utente

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www.tek-trol.com

TEK-LCD 7802A

NEMA 4X Loop-Powered Flow Rate/Totalizer Indicator

Instruction Manual

Document Number:IM-7802A

NOTICE

Read this manual before working with the product. For personal and system safety, and for optimum

product performance, make sure you thoroughly understand the contents before installing, using, or

maintaining this product.

For technical assistance, contact

Customer Support

796 Tek-Drive

Crystal Lake, IL 60014

USA

Tel: +1 847 857 6076, +1 847 655 7428

www.tek-trol.com

No part of this publication may be copied or distributed, transmitted, transcribed, stored in a

retrieval system, or translated into any human or computer language, in any form or by any means,

electronic, mechanical, manual, or otherwise, or disclosed to third parties without the express

written permission. The information contained in this manual is subject to change without notice.

Table of Contents

1Safety Instructions.........................................................................................................................4

1.1 Installation ........................................................................................................................................ 4

1.2 Unpacking ......................................................................................................................................... 4

1.3 Conduit/Stopping Plug ....................................................................................................................... 4

2Product Description.......................................................................................................................5

2.1 Introduction ...................................................................................................................................... 5

2.2 Specifications..................................................................................................................................... 5

2.3 Dimensional Drawing......................................................................................................................... 8

2.4 Ordering Information ......................................................................................................................... 9

2.5 Mounting........................................................................................................................................... 9

3Connections ................................................................................................................................ 10

3.1 Input Signal & Backlight Connections................................................................................................ 11

3.2 External Reset Connection ............................................................................................................... 12

3.3 Open Collector Output Connections ................................................................................................. 13

4Setup and Programming .............................................................................................................. 14

4.1 Overview ......................................................................................................................................... 14

4.2 Through-Window Buttons ................................................................................................................ 14

4.3 Buttons and Display ......................................................................................................................... 15

4.4 Main Menu Display Functions & Messages ....................................................................................... 16

4.4.1 Main Menu ............................................................................................................................................. 17

4.4.2 Setting Numeric Values........................................................................................................................... 18

4.4.3 Setting Up the Meter (SETUP) ................................................................................................................ 18

4.4.4 Setting the Decimal Point (dEc_PT) ........................................................................................................ 19

4.4.5 Programming the Meter (PRoG)............................................................................................................. 20

4.4.6 Scaling the Meter (SCALE) ...................................................................................................................... 21

4.4.7 Calibrating the Meter (CAL).................................................................................................................... 22

4.4.8 Setting the Time Base (tbAsE)................................................................................................................ 23

4.4.9 Setting the Total Conversion Factor (totCF) ........................................................................................... 23

4.4.10 Manual or Automatic Total Reset Function (t rST)............................................................................. 24

4.4.11 Setting the Tag Display (tAG).............................................................................................................. 25

4.4.12 Setting Up the Password (PASSWRD) .................................................................................................... 26

4.4.13 Disabling Password Protection........................................................................................................... 26

4.4.14 Service Feature (SERVICE)................................................................................................................... 27

4.5 Advanced Features Menu & Display Messages.................................................................................. 28

4.5.1 Advanced Features Menu....................................................................................................................... 29

4.5.2 Alarm & Pulse Output (OUTPUT)............................................................................................................... 30

4.5.3 Alarm Output (Alrm) ................................................................................................................................ 30

4.5.4 Pulse Output K-Factor (PulsE)................................................................................................................. 31

4.5.5 Advanced Function Selection (FUNCTN) ................................................................................................... 31

4.5.6 Multi-Point Linearization (lnEAr) ............................................................................................................ 31

4.5.7 Manual Entry (SCALE) ............................................................................................................................. 31

4.5.8 External Calibration (CAL)....................................................................................................................... 31

4.5.9 Square Root Linearization (SquAr).......................................................................................................... 32

4.5.10 Programmable Exponent Linearization (ProG.E)................................................................................ 32

4.5.11 Low-Flow Cutoff (CUTOFF) ................................................................................................................... 33

4.5.12 Input Signal Filter (FILTER) ................................................................................................................. 33

4.5.13 Internal Calibration (ICAL).................................................................................................................. 33

4.5.14 Error Message (SPAn ERROR).............................................................................................................. 34

4.5.15 Information (INFO).............................................................................................................................. 34

5Operation.................................................................................................................................... 35

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

5.2 Maximum & Minimum Readings (MAXIMUM &MINIMUM)) .................................................................... 35

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

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

6Troubleshooting .......................................................................................................................... 38

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

7Quick User Interface Reference.................................................................................................... 39

7.1 Operational Modes .......................................................................................................................... 39

Disclaimer

The information contained in this document is subject to change without notice. Tek- Trol 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.

WARNING

•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. Tek-Trol

LLC shall not be held liable for damages resulting from such improper use.

•Failure to follow installation guidelines could result in death or serious injury.

Make sure only qualified personnel perform the installation.

CAUTION

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

Limited Warranty

Tek-Trol LLC warrants this product against defects in material or workmanship for the specified period

under “Specifications” from the date of shipment from the factory.

Tek-Trol’s liability under this limited warranty shall not exceed the purchase value, repair, or

replacement of the defective unit.

Registered Trademarks

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

1Safety Instructions

WARNING

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

requiring replacement of internal components must be performed at the factory.

•Disconnect from supply before opening enclosure. Keep cover tight while circuits are

alive.

•If the meter is installed in a high voltage environment and a fault or installation error

occurs, high voltage may be present on any lead.

1.1 Installation

WARNING

Hazardous voltages may exist within enclosure. Installation and service should be performed

only by trained service personnel.

Wiring connectors are accessed by opening the enclosure. To access electrical connectors, remove

the 2 captive screws, then disconnect the ribbon cable from the display module and set the display

module aside.

1.2 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.

1.3 Conduit/Stopping Plug

The Tek-LCD 7802A is provided with three ¾ NPT threaded conduit openings and one IP68 rated ¾

NPT plastic conduit plug.

The conduit/stopping plug included has 1.29 wrenching flats and a screwdriver slot.

2Product Description

2.1 Introduction

The Tek-LCD 7802A is a plastic field mounted loop-powered rate/totalizer fully featured for

demanding applications in the harshest environmental conditions. The meter derives all of its

power from the 4-20 mA loop. It is programmed using the four through-window buttons, without

removing the cover, and can be scaled with or without a calibration signal. The numeric rate display

will read up to 99999 and the alphanumeric total/tag display will read up to 9999999. The

alphanumeric display can also be programmed to show any combination of numbers and letters up

to seven characters long for use as engineering units and/or the process identification tag. The

backlight lets you see the display under any lighting condition and can be powered from either the

4-20 mA loop or from a separate DC power supply.

The enclosure has three threaded conduit holes, integrated pipe or wall mounting flanges, and

allows for easy installation of tamper seals.

2.2 Specifications

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

General

Display

Five digits

(-9999 to 99999)

0.70" (0.05ft) high, 7-segment, automatic lead zero

blanking.

Seven characters (Total and/or

Tag)

0.4" (0.03ft) high, 14-segment. 7-digit Totalizer

9,999,999

Symbols

High, Low, & Set Alarm, Password Lock

Backlight

White

Display Update Rate

Ambient > -25°C: 2 Updates/Second Ambient < -25°C: 1 Update/5 Seconds

Overrange

Display flashes 99999

Underrange

Display flashes -9999

Programming Method

Four through-window buttons when cover is installed. Four internal pushbuttons

when cover is removed.

Noise Filter

Programmable Lo

med

OFF

Recalibration

Recalibration is recommended at least every 12 months.

Max/Min Display

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

power to the meter is turned off.

Password

Programmable password restricts modification of programmed settings.

Non-Volatile Memory

All programmed settings and total reading are stored in non- volatile memory for a

minimum of ten years if power is lost.

Normal Mode Rejection

64 dB at 50/60 Hz

Environmental

Operating temperature range: -40°C to 75°C (-40℉to 167℉) Storage

temperature range: -40°C to 75°C (-40℉to 167℉)Relative humidity: 0 to

90% non-condensing

Connections

Screw terminals accept 12 to 22 AWG wire

Enclosure

NEMA 4X, IP65 plastic field enclosure. Color: grey.

Three ¾ NPT threaded conduit openings. One ¾ NPT plastic conduit plug,

with 1.29 wrenching flats and a screwdriver slot, is included.

Mounting

May be mounted directly to conduit. Two slotted flanges for wall mounting

or NPS 1½ to 2½ or DN 40 to 0.21ft pipe mounting. See DIMENSIONAL

DRAWING on page 7.

Overall Dimensions

5.67 x 5.25 x 4.18 (W x H x D)

(0.47ft x 0.43ft x 0.34ft)

Weight

1.65 lbs (26.4 oz, 0.75 kg)

Warranty

3 years parts and labor

Input

Accuracy

±0.03% of calibrated span ±1 count, square root & programmable exponent

accuracy range: 10-100% of calibrated span.

Advanced Function

Linear, square root, or programmable exponent

Multipoint Linearization

2 to 32 points

Programmable Exponent

1.0001 to 2.9999

Low Flow Cut- Off

0-99999 (0 disables cutoff function)

Temperature Drift

50 PPM/°C from -40°C to 75°C (-40℉to 167℉) ambient

Decimal Point

User selectable decimal point

Totalizer

Calculates total based on rate, time base of second, minute, hour, or day,

and field programmable multiplier; stored in non-volatile memory upon

power loss.

Totalizer Reset

User selectable via through-window buttons, time delay, external contact

closure, or protected

Calibration Range

An Error message will appear if input 1 and input 2 signals are too close

together.

Input Range

Minimum Span Input 1 & Input 2

4-20 mA

0.10 mA

Maximum Voltage

Drop

Without Backlight or with

Externally-Powered (DC

Powered) Backlight

With Loop-Powered Backlight

3.0 VDC @ 20 mA

6.0 VDC @ 20 mA

Equivalent Resistance

-150 Ω @ 20 mA

300 Ω @ 20 mA

Externally Powered

Backlight

Voltage Range:

Maximum Power

9-36 VDC.

9 VDC 12VDC 24VDC 36VDC

0.2 W 0.25 W 0.5 W 0.75 W

Input Overload

Over current protection to 20 mA max.

Open Collector Output

Rating

Isolated open collector, 30 VDC @ 150 mA max.

Alarm Output

Assign to rate for high or low alarm trip point. Assign to total for total

alarm trip point.

Deadband

0-100% FS, user selectable

Acknowledge

Front panel ACK button resets output and screen indication.

Pulse Output K-Factor

K-factor programmable from 0.0001 to 99999. One pulse is generated

for every total increment selected (e.g. K-factor value of 100 will

generate one pulse every time the total is incremented by 100 units).

If the pulse output exceeds the programmed output frequency, pulses

are accumulated as pending and are not lost. Pulses will continue to

output until the buffer is emptied or the total is reset from the front

panel.

Pulse Output Frequency

Programmable frequency: 2, 4, 8, 16, 32, 64, 128 Hz. Minimum

pulse width: 3.9 ms @ 128 Hz

Maximum pulse width: 250 ms @ 2 Hz Factory default pulse width: 31

ms @ 16 Hz

2.3 Dimensional Drawing

Enclosure Dimensions –Front View

Enclosure Dimensions –Side Cross Section View

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