GE HygroPro User manual

GE
Measurement & Control Moisture
916-099 Rev. D
November 2012
HygroPro
User’s Manual

www.ge-mcs.com
©2012 General Electric Company. All rights reserved.
Technical content subject to change without notice.
GE
Measurement & Control
HygroPro
Moisture Transmitter
User’s Manual
916-099 Rev. D
November 2012

ii
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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
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