Omega PHTX-11 User Manual

OjyjEGA

ENGINEERING, INC.

AnO.VfEG.4

Operator ’s Manual

Group Company

WARRANTY

OMEGA

(1) coverage on each product. If the unit should malfunction, it must be returned to the factory for evaluation. Our Customer Service Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective it will be repaired or replaced at no charge. However, this WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of being damaged as a result of excessive current, heat, moisture, vibration, or misuse. Components which wear or which are damaged by misuse are not warranted. These include contact points, fuses, and

THERE ARE NO WARRANTIES EXCEPT AS STATED HEREIN. THERE ARE NO OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND OF

FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL OMEGA ENGINEERING, INC. BE LIABLE FOR CONSEQUENTIAL, INCIDENTALOR SPECIAL DAMAGES. THE BUYER ’S SOLE REMEDY FOR ANY BREACH OF THIS AGREEMENT BY OMEGA ENGINEERING, INC. OR ANY BREACH OF ANY WARRANTY BY OMEGA

ENGINEERING, INC. SHALL NOT EXCEED THE PURCHASE PRICE PAID BY THE PURCHASER TO OMEGA

ENGINEERING, INC. FOR THE UNIT OR UNITS OR EQUIPMENT DIRECTLY AFFECTED BY SUCH BREACH.

warrants this unit to be free of defects in materials and workmanship and to give satisfactory service for a period

months from date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal one

year product warranty to cover handling and shipping time. This ensures that our customers receive maximum

triacs.

Return Requests/Inquirie s

Direct all warranty and repair requests/inquiries to OMEGA Customer Service Department, telephone number (203) 359-1660. Before returning any instrument, please contact the OMEGA Customer Service Department to obtain

an authorized return (AR) number. The designated AR number should then be marked on the outside of the return

package. To avoid processing delays, also please be sure to include:

1. Returnee ’s name, address, and phonenumber.

2. Model and Serial numbers.

3. Repair instructions.

One Omega Drive, Box 4047 Stamford, Connecticut 069074047 (203) 359-1660 Telex: 996404 Cable: OMEGA FAX: (203) 359-7700

OMEGA3 is a registered trademark of OMEGA ENGINEERING, INC.

Copyright 1986 OMEGA ENGINEERING, INC. All rights reserved including illustrations. Nothing in this manual may be reproduced in any manner, either wholly or in part for any purpose whatsoever without written permission from OMEGA ENGINEERING, INC.

Printed in U.S.A.

M446/026

PART I

INTRODUCTION

TABLE OF CONTENTS

Page No.

Specification s General Descriptio n

PART II

PART III

INSTALLATION

Unpacking Mounting Wiring

OPERATION INSTRUCTION

TECHNICAL INFORMATION

Controls

Operation

PART IV

CALIBRATION

Calibration interval

Equipment required

Calibration procedure

1 2

2 2 3

4/s

5 5 5/6

PART

V SERVICE

Block diagram

Table I

Transmitter dimensions input/output connections and Adjustment pot location

Table II

7 8

MODEL PHTX-11 SPECIFICATIONS

Spans:

Input Impedance:

Output Current:

Power Supply:

Load Resistor:

Linearity:

Temperature Coefficient:

Accuracy:

Repeatability:

Output meter:

Any 1 thru 14,

jumper programmable zero and span adjustable

1013

1 x

4 to

12 to

ohm

2onlA

VDC

iim+DC>O~~~ONAL

0 to 3400 ohms

pH*.Ol

02%/OC

(Display

ht.01

digit

and current out)

pHk.01

LC D

Supply Voltage Effect:

Operating Temperature:

R.H.:

Isolation:

Common Mode Rej.:

Temperature Compensation:

.Ol%/Volt

+60°C

95%

-10 to

600 VDC or peak

-120dB

60 Hz

Manual or auto

-l-

PART I

INTRODUCTION

General

The

put isolation,

modular construction, programmable span selection,

compensation and a NEMA

The Model PHTX-11 accepts as its input any

description

OMEGAmModel PHTX-11 is a 2-wire

wide power supply range, high input impedance, LCD digital display,

housing as a standard enclosure.

pH/ORP

transmitter featuring input-out-

manual/automatic temperature

probe via a BNC co-axial connector.

It transforms the probe signal to a 4 to 20mA D.C. signal that may be transmitted over 2-wires to a control location. The signal wires also provide power to the transmitter.

loop.

Any

The output is monitored by placing a load resistor in the current

D-C.

power supply from 12 to 80 volts may be used.

The input is iso- lated from the output to prevent accidental damage of sensitive data gathering equipment at the control location.

The

level is constantly displayed on a 3% digit L.C.D. A push button switch

allows the display to indicate the

output on command.

The user can change the range of output signal by utilizing jumpers on one of the circuit boards and adjusting the zero and span pots.

can be for the full 0 to 14

pH.

range or as little as 1

The 4 to 20mA output

unit, for example 6

PART II

Unpacking

After unpacking, remove instrument cover,

INSTALLATION

remove shipping ties or clamp.

Note any special instructions included in the package.

Mounting

2.0 Before mounting the signal conditioner enclosure, remove the assembled circuit boards by removing the two

phillips

head screws in the bottom

of the enclosure.

2.1 Conduit Mounting the appropriate size hubs in the ends of the box (ie:

the unit can be supported by ridged conduit using

l/2"

Cut the threaded male portion to allow room for the circuit board.

2.2 Flat Surface feet be attached to the box. feet mounted with

2.3 Pipe Mounting The

"U"

bolts should bolt to the heavy PVC mounting feet.

mounting to a flat surface requires the heavy PVC mounting

The surface should be drilled and the

#lO

screws and nuts.

"U"

attachment to a round pipe requires

bolts and nuts.

3/4").

-2-

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