GE HygroPro Manuale utente

Measurement & Control Moisture

916-099 Rev. D

November 2012

HygroPro

User’s Manual

www.ge-mcs.com

Technical content subject to change without notice.

Measurement & Control

HygroPro

Moisture Transmitter

User’s Manual

916-099 Rev. D

November 2012

[no content intended for this page - proceed to next page]

HygroPro User’s Manual Page iii

Contents

Chapter 1: Installation

1.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.2 Sample System Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.3 Mounting the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

1.4 Wiring the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.4.1 Standard Wiring Connections . . . . . . . . . . . . . . . . . . . . . . .6

1.4.2 Hazardous Area Wiring Connections . . . . . . . . . . . . . . . .11

Chapter 2: Operation

2.1 Powering Up & Programming. . . . . . . . . . . . . . . . . . . . . . . . . . .19

2.1.1 Menu Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

2.1.2 Keypad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

2.2 Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

2.2.1 Unlocking the Display. . . . . . . . . . . . . . . . . . . . . . . . . . . .21

2.2.2 Entering the Setup Program. . . . . . . . . . . . . . . . . . . . . . . .22

2.2.3 Selecting Measurement Parameters. . . . . . . . . . . . . . . . . .23

2.2.4 Setting Up the Display. . . . . . . . . . . . . . . . . . . . . . . . . . . .25

2.2.5 Setting Up the Analog Output . . . . . . . . . . . . . . . . . . . . . .26

2.2.6 Entering the Node ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

2.2.7 Setting Up the RS485 Output . . . . . . . . . . . . . . . . . . . . . .29

2.3 Advanced Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

2.3.1 Setting Up the Pressure/Temperature Displays . . . . . . . . .30

2.3.2 Entering Sensor Calibration Data . . . . . . . . . . . . . . . . . . .31

2.3.3 Locking and Unlocking the Keypad . . . . . . . . . . . . . . . . .33

2.3.4 Locking and Unlocking the Menus . . . . . . . . . . . . . . . . . .33

Contents

Page iv HygroPro User’s Manual

Chapter 3: Service & Maintenance

3.1 The Service Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

3.2 Moisture Probe Error Conditions. . . . . . . . . . . . . . . . . . . . . . . . 36

3.3 Cleaning the Moisture Probe. . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3.3.1 Preparing to Clean the Probe . . . . . . . . . . . . . . . . . . . . . . 36

3.3.2 Replacing the RTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3.3.3 Removing the Transmitter from the System . . . . . . . . . . 38

3.3.4 Removing the Probe from the Transmitter. . . . . . . . . . . . 38

3.3.5 Cleaning the Sensor and the Shield . . . . . . . . . . . . . . . . . 40

3.3.6 Installing the Probe in the Transmitter. . . . . . . . . . . . . . . 41

3.3.7 Evaluating the Cleaned Probe . . . . . . . . . . . . . . . . . . . . . 41

Chapter 4: Specifications

4.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.2 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4.3 Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.4 Moisture Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.5 Built-In Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.6 Built-In Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.7 Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

HygroPro User’s Manual Page 1

Chapter 1: Installation

1.1 Introduction

The HygroPro Moisture Transmitter is a compact, intrinsically-safe,

loop-powered, 4-20 mA transmitter that provides accurate dew/frost

point measurements over a range of –110 to 20°C (-166 to 68°F). It

features an integrated display and a six-button keypad, and it is

housed in an IP67/Type 4X enclosure.

The HygroPro transmitter uses an aluminum oxide moisture sensor,

and it includes a temperature thermistor and a pressure transducer on

a common mount for calculation of parameters such as:

•ppmvin gases

•ppmwin liquids

•pounds per million standard cubic feet in natural gas

•process relative humidity.

IMPORTANT: To install the HygroPro in a hazardous (classified) area,

see Hazardous Area Wiring Connections on page 15.

Chapter 1: Installation

Page 2 HygroPro User’s Manual

1.2 Sample System Guidelines

The HygroPro transmitter can be installed in a sample system or

directly in the process line. However, GE recommends that the unit be

installed in a sample system to protect the probe from potentially

damaging components in the process stream. Figure 1 below shows a

typical sample system.

Figure 1: A Typical Sample System

Note: At least 5 ft (1.5 m) of 1/4” (6 mm) tubing vented to

atmosphere will ensure an accurate process sample and avoid

diffusion of ambient air moisture back into the process.

Flow

Probe

Valve 1

Valve 2 Flow Cell

See note below

Intake near the center of the

pipe is recommended.

HygroPro

Needle

HygroPro User’s Manual Page 3

Chapter 1: Installation

1.2 Sample System Guidelines (cont.)

In the sample system shown in Figure 1 on the previous page, fully

open Valve 1 and use Valve 2 to regulate the sample flow for

measurements at process system pressure. For measurements at

atmospheric pressure, fully open Valve 2 and use Valve 1 to regulate

the sample flow.

Before constructing a sample system, consult a GE application

engineer and observe the following guidelines:

•The sample system should be very simple and should contain as

few components as possible. All or most of those components

should be located downstream of the measurement point.

•Sample system components must not affect moisture readings.

Most common filters and pressure regulators are not suitable for

sample systems because the wetted parts adsorb moisture or

release moisture into the sample system. They may also allow

ambient contamination to enter the sample system. If possible, use

stainless steel for all wetted parts.

•The HygroPro probe should be oriented perpendicular to the

sample system inlet. For dimensions and other sample system

requirements see Mechanical Specifications on page 46.

•Sample systems should be tested for leaks prior to operation, using

a Snoop leak detector, to verify the integrity of connections,

components and fittings.

IMPORTANT: When pressurizing or depressurizing the sample system,

be careful to avoid shock damage to the moisture sensor.

Chapter 1: Installation

Page 4 HygroPro User’s Manual

1.3 Mounting the Transmitter

!CAUTION!

If the HygroPro will be installed directly into the process

line, consult GE for proper installation instructions and

precautions before proceeding.

Refer to Figure 2 below and complete the steps on the next page to

install the HygroPro transmitter.

Figure 2: HygroPro Installation

Probe Hex Nut

3/4-16 UNF-2A

Shield

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