PART I - INTRODUCTION

General description

The OMEGAmModel PHTX-11 is a 2-wire pH/ORP transmitter featuring input-out- put isolation, wide power supply range, high input impedance, LCD digital display,

modular construction, programmable span selection, manual/automatic temperature compensation and a NEMA 4X housing as a standard enclosure.

The Model PHTX-11 accepts as its input any

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.

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

loop.

Any

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.

 

The 4 to 20mA output

can be for the full 0 to 14

pH

range or as little as 1

pH

unit, for example 6

to

7 pH.

 

 

 

 

 

 

PART II - INSTALLATION

1.Unpacking

After unpacking, remove instrument cover, remove shipping ties or clamp. Note any special instructions included in the package.

.

2.Mounting

2.0Before 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 unit can be supported by ridged conduit using

the appropriate size hubs in the ends of the box (ie:

l/2" or 3/4").

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

2.2 Flat Surface - mounting to a flat surface requires the heavy PVC mounting

feet be attached to the box. The surface should be drilled and the feet mounted with #lO screws and nuts.

2.3Pipe Mounting - attachment to a round pipe requires "U" bolts and nuts. The "U" bolts should bolt to the heavy PVC mounting feet.

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Omega Engineering PHTX-11 manual General description, Signal that may be transmitted, Loop Any, Input is iso
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PHTX-11 specifications

Omega Engineering PHTX-11 is an advanced temperature and pressure transmitter known for its robust design and high performance in various industries. The PHTX-11 is specifically designed to measure temperature and pressure accurately, making it an ideal choice for applications in process control, HVAC systems, and various manufacturing processes.

One of the main features of the PHTX-11 is its wide measurement range, capable of handling extreme temperatures and pressures. This versatility allows it to be used in a broad spectrum of applications, from food processing to chemical production. The device can function effectively in harsh environments, ensuring reliability and precision even under challenging conditions.

The PHTX-11 utilizes state-of-the-art sensing technologies to deliver high accuracy and fast response times. The temperature measurement is based on either thermocouple or RTD sensors, depending on the specific needs of the application. This flexibility allows users to choose the most suitable sensor for their requirements, enhancing the overall efficiency of the system.

Moreover, the pressure measurement in the PHTX-11 is achieved through high-quality piezo-resistive sensors, which provide superior performance and durability. These sensors are resistant to changes in temperature and can withstand overpressure conditions, ensuring long-term reliable service.

The PHTX-11 also features a user-friendly interface, making it easy to configure and calibrate. The digital display allows for real-time monitoring and provides valuable insights into system performance. Additionally, the transmitter supports various communication protocols, including analog outputs, which facilitate integration into existing control systems.

Another significant characteristic of the PHTX-11 is its compact and robust design. It is built in a rugged housing that meets high protection standards, such as NEMA and IP ratings, ensuring it can endure demanding industrial environments. This durability reduces downtime and maintenance costs, contributing to a more efficient operation.

In summary, Omega Engineering's PHTX-11 is a highly effective and versatile temperature and pressure transmitter. With its advanced sensing technologies, wide measurement range, user-friendly features, and rugged construction, it stands out as a top choice for industries that require dependable measurement solutions. Its capability to integrate seamlessly with various systems further enhances its appeal to engineers seeking reliable instrumentation in their processes.
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