Panametrics HydroProII User manual

panametrics.com 910-331 A
November 2022
HygroProII
Moisture Transmitter
User’s Manual

panametrics.com
Copyright 2022 Baker Hughes company.
This material contains one or more registered trademarks of Baker Hughes Company and its subsidiaries
in one or more countries. All third-party product and company names are trademarks of their respective
holders.
HygroProII
Moisture Transmitter
User’s Manual
910-331 A
November 2022

ii
[no content intended for this page]

HygroProII User's Manual iii
Contents
Chapter 1. Installation
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.2 Sample System Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Mounting the Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Wiring the Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.1 Standard Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.1.1 Standard Connections to Process Controller via Analog Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.1.2 Standard connection with a HART master (handheld device or control system). . . . . . . . . . . . . . . . . . . . . 7
1.4.1.3 Standard Connections with a PC for field software upgrade. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4.2 Hazardous Area Wiring Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.4.2.1 Applicable Standards and Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.4.2.2 Compliance Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.4.2.3 Electrical Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.4.2.4 Requirements for External Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.4.2.5 Specific Conditions for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.5 HART Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.5.1 HART Connection Point to Point. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.5.2 HART Connection Multi-Drop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.6 Software Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.7 Standard DD File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Chapter 2. Operation
2.1 Powering Up & Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2 Basic Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2.1 Calibration Reminder settings on initial power up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2.2 Selecting Measurement Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2.2.3 Setting up the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.2.4 Setting up the Analog Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.3 Advanced Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.3.1 Setting Up the Pressure/Temperature Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.3.2 Entering Sensor Calibration Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2.3.3 Changing the User Passcode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.3.4 Configuring HART Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2.3.5 About Display/Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Chapter 3. Service and Maintenance
3.1 The Service Menus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
3.2 Moisture Probe Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3 Cleaning the Moisture Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.1 Preparing to Clean the Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.2 Replacing the RTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.3 Removing the Transmitter from the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
3.3.4 Removing the Probe from the Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.3.5 Cleaning the Sensor and the Shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
3.3.6 Installing the Probe in the Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
3.3.7 Evaluating the Cleaned Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Chapter 4. Specifications
4.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.2 Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.3 Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.4 Moisture Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
4.5 Built-In Temperature Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.6 Built-In Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
4.7 Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Contents
iv HygroProII User's Manual
Appendix A. HygroProII HART® Field Device Specification
A.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
A.1.1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
A.1.2 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
A.1.3 Who should use this document? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
A.1.4 Abbreviations and definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
A.1.5 References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
A.2 Device Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
A.3 Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
A.4 Product Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
A.4.1 Process Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
A.4.1.1 Sensor Input Channels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
A.4.2 Host interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
A.4.2.1 Analog Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
A.4.2.2 Digital Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
A.4.3 Local Interfaces, Jumpers and Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
A.4.3.1 Local Controls and Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
A.4.3.2 Internal Jumpers and Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
A.5 Device Variables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
A.6 Status Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
A.6.1 Device Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
A.6.2 Extended Device Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
A.6.3 Additional Device Status (Command #48) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
A.7 Universal Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
A.8 Common-Practice Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
A.8.1 Supported Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
A.8.2 Burst Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
A.8.3 Catch Device Variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

HygroProII User's Manual v
Contents
A.9 Device-Specific Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
A.9.1 Command 130 (0x82): Set Loop Trim Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
A.9.2 Command 131 (0x83): Set Loop Current Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
A.9.3 Command 132 (0x84): Set Loop Current Percentage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
A.9.4 Command 133 (0x85): Set Primary Variable Range Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
A.9.5 Command 140 (0x8C): Read Primary Variable Range Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
A.9.6 Command 144 (0x90): Set Loop Measurement Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
A.9.7 Command 146 (0x92): Set Pressure Constant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
A.9.8 Command 147 (0x93): Read Pressure Constant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
A.9.9 Command 148 (0x94): Set Temperature Constant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
A.9.10 Command 149 (0x95): Read Temperature Constant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
A.9.11 Command 150 (0x96): Set Dew Point Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
A.9.12 Command 151 (0x97): Read Dew Point Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
A.9.13 Command 152 (0x98): Set Number of Hygro Calibration Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
A.9.14 Command 153 (0x99): Read Number of Hygro Calibration Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
A.9.15 Command 154 (0x9A): Read Hygro Calibration Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
A.9.16 Command 155 (0x9B): Write Hygro Calibration Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
A.9.17 Command 156 (0x9C): Set Pressure Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
A.9.18 Command 157 (0x9D): Read Pressure Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
A.9.19 Command 158(0x9E): Set Saturation Table Number of Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
A.9.20 Command 159 (0x9F): Read Saturation Table Number of Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
A.9.21 Command 160 (0xA0): Set Saturation Table Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
A.9.22 Command 161 (0xA1): Read Saturation Table Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
A.9.23 Command 162 (0xA2): Set Temperature Coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
A.9.24 Command 163 (0xA3): Read Temperature Coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
A.9.25 Command 166 (0xA6): Set Saturation Table Index to Read Table Array Element . . . . . . . . . . . . . . . . . . . . . . . . . 63
A.9.26 Command 167 (0xA7): Read Saturation Table Index to Read Table Array Element . . . . . . . . . . . . . . . . . . . . . . .64
A.9.27 Command 168 (0xA8): Set Hygro Calibration Curve Index to Read Table Array Element . . . . . . . . . . . . . . . . .64
A.9.28 Command 169 (0xA9): Read Hygro Calibration Curve Table Index to Read Table Array Element. . . . . . . . .65
A.9.29 Command 170 (0xAA): Read Loop Measurement Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
A.9.30 Command 171 (0xAB): Read Output Trim Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
A.9.31 Command 171 (0xAC): Read Output Trim Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
A.9.32 Command 173 (0xAD): Read Loop Current Percentage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
A.9.33 Command 192 (0xC0): Sends password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
A.9.34 Command 193 (0xC1): Sends new password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
A.9.35 Command 194 (0xC2): Read User Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
A.9.36 Command 197 (0xC5): Commit the changed parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
A.9.37 Command 198 (0xC6): Cancel the changed parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
A.10 Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
A.10.1 HART Engineering Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
A.11 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.11.1 Sampling Rates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.11.2 Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.11.3 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.11.4 Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.11.5 Command Response Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.11.6 Busy and Delayed-Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.11.7 Long Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.11.8 Non-Volatile Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.11.9 Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.11.10 Write Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.11.11 Damping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.12 Capability Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
A.13 Default Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
A.14 Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Contents
vi HygroProII User's Manual
Appendix B. HygroProII Field Service Update User Manual
B.1 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
B.1.1 Required Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
B.1.2 Hardware Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
B.1.3 Software Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
B.2 Accessing the Bootloader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
B.2.1 Activating the Bootloader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
B.2.2 Entering the Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
B.2.2.1 To enter the password. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
B.2.2.2 To enter the password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
B.2.2.3 Incorrect Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
B.2.2.4 Exiting without inputting a passcode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
B.3 Using the Bootloader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
B.3.1 The Main Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
B.3.1.1 Accessing the sub menus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
B.3.1.2 Exiting the bootloader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
B.3.1.3 Menu timeouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
B.3.2 Firmware Details Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
B.3.2.1 To view firmware details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
B.3.2.2 To return to the Main Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
B.3.3 Download and Install New Firmware Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
B.3.3.1 Download and install new firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
B.3.4 Erase NVM Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
B.3.4.1 To erase non-volatile memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

HygroProII User's Manual vii
Preface
Product Registration
Thank you for purchasing the HygroProII moisture transmitter from Panametrics. Please register your product at
www.bakerhughes.com/productregistration for product support such as the latest software/firmware upgrades,
product information and special promotions.
Services
Panametrics provides customers with an experienced staff of customer support personnel ready to respond to
technical inquiries, as well as other remote and on-site support needs. To complement our broad portfolio of
industry-leading solutions, we offer several types of flexible and scalable support services including: Training, Product
Repairs, Service Agreements and more. Please visit www.bakerhughesds.com/services for more details.
Typographical Conventions
Note: These paragraphs provide information that provides a deeper understanding of the situation, but is not
essential to the proper completion of the instructions.
IMPORTANT: These paragraphs provide information that emphasizes instructions that are essential to proper setup
of the equipment. Failure to follow these instructions carefully may cause unreliable performance.
Safety Issues
CAUTION! This symbol indicates a risk of potential minor personal injury and/or severe damage to
the equipment, unless these instructions are followed carefully.
WARNING! This symbol indicates a risk of potential serious personal injury, unless these
instructions are followed carefully.
WARNING! It is the responsibility of the user to make sure all local, county, state and national
codes, regulations, rules and laws related to safety and safe operating conditions are
met for each installation.
Attention European Customers!To meet CE Mark requirements for all units intended for use in the EU,
all electrical cables must be installed as described in this manual.

Preface
viii HygroProII User's Manual
Auxiliary Equipment
Local Safety Standards
The user must make sure that he operates all auxiliary equipment in accordance with local codes, standards,
regulations, or laws applicable to safety.
Working Area
Qualification of Personnel
Make sure that all personnel have manufacturer-approved training applicable to the auxiliary equipment..
Personal Safety Equipment
Make sure that operators and maintenance personnel have all safety equipment applicable to the auxiliary
equipment. Examples include safety glasses, protective headgear, safety shoes, etc.
Unauthorized Operation
Make sure that unauthorized personnel cannot gain access to the operation of the equipment.
WARNING! Auxiliary equipment may have both manual and automatic modes of operation. As
equipment can move suddenly and without warning, do not enter the work cell of this
equipment during automatic operation, and do not enter the work envelope of this
equipment during manual operation. If you do, serious injury can result.
WARNING! Make sure that power to the auxiliary equipment is turned OFF and locked out before
you perform maintenance procedures on this equipment.

HygroProII User's Manual ix
Preface
Environmental Compliance
RoHS
The HygroProII moisture transmitter fully complies with RoHS regulations (Directive 2011/65/EU).
Waste Electrical and Electronic Equipment (WEEE) Directive
Baker Hughes is an active participant in Europe’s Waste Electrical and Electronic Equipment (WEEE) take-back
initiative (Directive 2012/19/EU).
This equipment has required the extraction and use of natural resources for its production. It may contain hazardous
substances that could impact health and the environment.
In order to avoid the dissemination of those substances in our environment and to diminish the pressure on the
natural resources, we encourage you to use the appropriate take-back systems. Those systems will reuse or recycle
most of the materials of your end life equipment in a sound way.
The crossed-out wheeled bin symbol invites you to use those systems.
If you need more information on the collection, reuse and recycling systems, please contact your local or regional
waste administration.
Please visit www.bakerhughesds.com/health-safety-and-environment-hse for take-back instructions and more
information about this initiative.

Preface
x HygroProII User's Manual
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HygroProII User's Manual 1
Chapter 1. Installation
Chapter 1. Installation
1.1 Introduction
The HygroProII 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°C to 20°C (-166°F to 68°F). It features an integrated
display and a six-button keypad, and is housed in an IP66/67, NEMA 4X rated enclosure. As shown in Figure 1, the
HygroProII transmitter consists of two major components - the display head with the end user connection and the
replaceable transducer element (HygroRTE) or probe assembly that includes all the sensors and read-out
electronics.
The HygroProII
transmitter uses a state-of-the-art Aluminum Oxide trace moisture sensor that is temperature
compensated for optimal accuracy. It includes a sample temperature sensing thermistor as well as an optional
piezo-resistive pressure transducer. All three sensors are mounted on a common hermetically sealed mount isolated
from the read-out electronics. In addition to process dew/frost point, it can provide in real time calculated process
parameters such as:
• ppmv in gases
• ppmw in liquids
• pounds per million standard cubic feet in natural gas
• process relative humidity
Figure 1: Major components of the HygroProII – the display head and HygroRTE probe assembly
IMPORTANT:
To install the HygroProII in a hazardous (classified) area, see “Hazardous Area Wiring Connections” on
Page 9.

Chapter 1. Installation
2 HygroProII User's Manual
1.2 Sample System Guidelines
The HygroProII transmitter can be installed in a sample system or directly in the process line. However, Panametrics
recommends that the transmitter be installed in a sample system to protect the sensor probe from potentially
damaging components in the process stream. Figure 2 below shows a typical sample system.
Figure 2: 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.
In the sample system shown in Figure 2 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 Panametrics 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 HygroProII probe should be oriented perpendicular to the sample system inlet. For dimensions and other
sample system requirements, see “Mechanical” on Page 38.
• 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. Also, the sample pressure should be increased/decreased gradually to avoid explosive
decompression of the O-ring.

HygroProII User's Manual 3
Chapter 1. Installation
1.3 Mounting the Transmitter
Refer to Figure 3 below and complete the steps on the next page to install the HygroProII transmitter.
Figure 3: Key HygroProII parts relevant to installation
1. Make sure the stainless-steel shield is in place over the sensor. This shield protects the aluminum oxide sensor
from damage during operation.
2. Using the integral 3/4-16 straight male thread, screw the probe end of the transmitter into the process or sample
system fitting. Make sure not to damage the threads.
Note: A 3/4-16 to G 1/2 thread adapter is available from Panametrics.
3. Using a 1-1/8” wrench on the probe hex nut, tighten the probe securely into the process or sample system fitting.
CAUTION! The O-ring on the HygroIIRTE mount at the base of the ¾-16 straight thread should be
checked prior to mounting the HygroProII and replaced if necessary. Failure to replace
the O-ring when the probe is dismounted and replaced can result in hazardous gas
leaks.
CAUTION! If the HygroProII will be installed directly into the process line, consult Panametrics for
proper installation instructions and precautions before proceeding.
CAUTION! Do not apply torque to the transmitter display module to tighten the unit into its sample
system fitting.

Chapter 1. Installation
4 HygroProII User's Manual
Note: Do not unscrew and remove the metal desiccant cap from the probe until just prior to installation of the
probe in the process.
Note: If there is insufficient space to rotate the HygroProII during installation, remove the Replaceable Transducer
Element (RTE) from the transmitter, install it in the fitting, then re-install the transmitter display onto the RTE.
Note: At least 5 ft. (1.5 m) of 1/4” OD (6 mm) tubing vented to atmosphere will ensure an accurate process sample
and avoid diffusion of ambient air moisture back into the process.
Installation of this transmitter on the process can be done in three easy steps as described below:
Step 1: Connect the shielded 4-wire cable supplied with the HygroProII to the keyed bulkhead connector on the back
of the transmitter using the threaded M8 connector. Then install the cable protector on the back with its two
captive screws. Care should be taken to thread the connector-free end of the cable through the slot in the
cable protector prior to installing it on the HygroProII so as not to damage the cable.
Figure 4: HygroProII installation step 1 – initial wiring
Step 2: Just prior to installation on the process, gently unscrew the Aluminum desiccant cap from the bottom of the
probe to expose the shielded Aluminum Oxide moisture sensor to the process gas. Discard the desiccant
packs enclosed in the cap.
Figure 5: HygroProII installation step 2 – removing desiccant cap

HygroProII User's Manual 5
Chapter 1. Installation
Step 3: Install the HygroProII into the process by threading it into the sampling port or sample cell. Please note the
transmitter should be tightened using a 1-1/8” wrench only on the hex nut of the probe until it is sealed on the
O-ring surface. Please do not torque the display head, but gently swivel it to face the correct direction after
the probe is fully tightened.
Figure 6: HygroProII installation step 3 – installing into sample cell
1.4 Wiring the Transmitter
Proceed to the appropriate section for instructions on:
• Standard Wiring Connections (proceed to the next page)
• Hazardous Area Wiring Connections (proceed page 9)
1.4.1 Standard Wiring Connections
The HygroProII is a 4-20 mA loop-powered device that can use the same two conductors for its measurement signal
lines and its power supply lines. Follow the installation instructions in this section only for units not requiring
hazardous (classified) area protection.
IMPORTANT: To install the HygroProII in a hazardous (classified) area,
see “Hazardous Area Wiring Connections” on
Page 9.
The transmitter must be wired using the factory-supplied 2-meter or 10-meter 4-wire shielded black standard cable.
If a different cable length is required, please contact the factory for assistance.
Note: If a longer cable is required, you may splice an extension onto the standard cable. Please be sure to connect
leads of the same color together. For example, connect blue lead to blue lead, brown lead to brown lead, etc.
The HygroProII may be connected to the following types of external data acquisition and control systems:
1. An external device (such as a process controller) that can provide the loop power to the HygroProII and can also
receive and display the 4-20 mA analog output from the HygroProII (proceed to next page)

Chapter 1. Installation
6 HygroProII User's Manual
2. A Highway Addressable Remote Transducer (HART) communicator (handheld device or plant control system)
that can communicate digitally with the HART enabled HygroProII transmitter over the same two wires as used for
the analog output in either a point-to-point or multi-drop configuration)
3. An external power supply to provide power to the HygroProII plus a personal computer (PC) running TeraTerm or
other terminal emulator that can used for field upgrade of the HygroPro firmware (proceed to page 9)
IMPORTANT: To install the HygroProII in a hazardous (classified) area,
see “Hazardous Area Wiring Connections” on
Page 9.
1.4.1.1 Standard Connections to Process Controller via Analog Output
Refer to Figure 7 below and Table 1 below, and complete the following steps to wire the transmitter.
Figure 7: Standard connection to Process Controller via Analog Output
Table 1: Cable leads for Analog Output
Lead Connection Description
Blue Power Supply (+) [12-28 VDC]
Brown Power Supply (–) [Return]
Shield Earth Ground [recommended]

HygroProII User's Manual 7
Chapter 1. Installation
1. Push the keyed female M8 connector end of the factory-supplied standard (black) cable into the mating
bulkhead connector on the back of the transmitter module.
2. Make sure the pins are properly aligned using the key in the female connector. Then, secure the connectors
together by sliding the metal sleeve on the female connector over the bulkhead connector and turning it
clockwise until it is tight.
3. Using the flying leads at the other end of the factory-supplied cable, connect the transmitter to the external
analog power and measurement device.
Note: The blue and brown leads also carry the measurement signal current output of 4-20 mA.
4. Trim any unused leads even with the outer cable jacket to remove any bare wire and prevent accidental short
circuits.
1.4.1.2 Standard connection with a HART master (handheld device or control system)
1. Push the keyed female M8 connector end of the factory-supplied cable into the mating male connector on the
back of the transmitter module.
2. Make sure the pins are properly aligned using the key in the female connected. Then, secure the connectors
together by sliding the metal sleeve on the cable over the connectors and turning it clockwise until it is tight.
3. Using the brown and blue flying leads at the other end of the factory-supplied cable, connect the HygroProII as
shown below to the 24 VDC power supply through the 250 Ω load resistor that is used to convert the 4 – 20 mA
output to a 1 – 5 VDC signal.
4. Trim any unused leads even with the outer cable jacket to remove any bare wire and prevent accidental short
circuits.
5. The HART protocol allows for up to two masters to be connected simultaneously to a single HART slave
(HygroProII).
Figure 8: Standard connections with HART master devices (handheld and Plant Control system)

Chapter 1. Installation
8 HygroProII User's Manual
1.4.1.3 Standard Connections with a PC for field software upgrade
Refer to Figure 9 on the next page and Table 2 below, and complete the following steps to wire the transmitter.
1. Connect an RS485-to-USB adapter (customer-supplied) to an available serial port on the PC.
2. Push the female connector end of the factory-supplied cable into the mating male connector on the transmitter
module. Make sure the pins are properly aligned. Then, secure the connectors together by sliding the metal
sleeve on the cable over the connectors and turning it clockwise until it is tight.
3. Using the flying leads at the other end of the factory-supplied cable, connect the transmitter to the
RS-485-to-USB adapter. The cable shield should be connected to the common terminal.
4. Trim any unused leads even with the outer cable jacket to remove any bare wire and prevent accidental short
circuits.
IMPORTANT: To install the HygroProII in a hazardous (classified) area,
see “Hazardous Area Wiring Connections” on
Page 9.
Figure 9: Standard connections with a PC
Table 2: Cable Leads - With a PC
Lead Connection Description
Blue Power Supply (+) [12-28 VDC]
Brown Power Supply (–) [Return]
White RS485-RS232 Converter (+) [positive]
Black RS485-RS232 Converter (–) [negative]
Ground Earth Ground