Omega PHTX-11 User Manual
OjyjEGA
ENGINEERING, INC.
AnO.VfEG.4
Operator ’s Manual
Group Company
WARRANTY
OMEGA
of
(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
13
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.
0
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.
1
M446/026
PART I
-
INTRODUCTION
TABLE OF CONTENTS
Page No.
Specification s
General Descriptio n
PART II
1.
2.
3.
PART III
-
INSTALLATION
Unpacking
Mounting
Wiring
-
OPERATION INSTRUCTION
TECHNICAL INFORMATION
1.
Controls
2.
Operation
PART IV
-
CALIBRATION
1.
Calibration interval
2.
Equipment required
3.
Calibration procedure
1
2
2
2
3
&
4
4/s
5
5
5/6
PART
V SERVICE
1.
Block diagram
2.
Table I
3.
Transmitter dimensions input/output connections and
Adjustment pot location
4.
Table II
7
8
9
10
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
ii
ohm
2onlA
80
VDC
iim+DC>O~~~ONAL
Ez
0 to 3400 ohms
pH*.Ol
02%/OC
f.
(Display
ht.01
3%
digit
and current out)
pH
pHk.01
LC D
Supply Voltage Effect:
Operating Temperature:
R.H.:
Isolation:
Common Mode Rej.:
Temperature Compensation:
.Ol%/Volt
to
+60°C
95%
-10 to
0
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,
4X
housing as a standard enclosure.
pH/ORP
transmitter featuring input-out-
manual/automatic temperature
pH
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
pH
level is constantly displayed on a 3% digit L.C.D. A push button switch
allows the display to indicate the
mA
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.
pH
can be for the full 0 to 14
pH.
to
7
range or as little as 1
The 4 to 20mA output
pH
unit, for example 6
-
PART II
1.
Unpacking
After unpacking, remove instrument cover,
INSTALLATION
remove shipping ties or clamp.
Note any special instructions included in the package.
2.
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.
.
or
3/4").
-2-
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