GE Hydran M2-X User manual

MA-029 Rev. 1.0, 30-Jul-18
GE Grid Solutions, Lissue Industrial Estate East,
Lissue Walk, Lisburn, BT28 2LU, United Kingdom
Tel: [phone],
Fax: [phone]
Email: ge4servic[email protected]
Web: www.gegridsolutions.com/md.htm
Hydran* M2-X
Transformer Gas Monitoring System
Instruction Manual

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Hydran* M2-X Instruction Manual
MA-029 Rev. 1.0, 30-Jul-18
Contents
Copyright Notice and Proprietary Rights..................................................................................................9
Trademark Notices...........................................................................................................................................9
Customer Service..............................................................................................................................................9
Safety Warnings In Six Languages ...........................................................................................................10
[EN] (in English) WARNINGS: ............................................................................................................10
[FR] (in French) ATTENTION: .............................................................................................................10
[ES] (in Spanish) ADVERTENCIA: ......................................................................................................10
[DE] (in German) WARNUNG: ...........................................................................................................11
[IT] (in Italian) ATTENZIONE:..............................................................................................................11
[SV] (in Swedish) VARNING:...............................................................................................................12
Safety Symbols Description.........................................................................................................................12
Preface................................................................................................................................................................13
Standard GE Warranty..................................................................................................................................14
1General Warnings ......................................................................................................................................16
2Introduction to the Hydran M2-X..........................................................................................................22
2.1 Overview...................................................................................................................................................22
2.1.1 Gas Detection .........................................................................................................................23
2.1.2 Moisture Detection ...............................................................................................................23
2.1.3 Optional I/O Interfaces ........................................................................................................24
2.1.4 Backward Compatibility with Hydran Products .........................................................24
2.1.5 Possible Configurations.......................................................................................................25
2.1.6 Other Features .......................................................................................................................25
2.2 External Components...........................................................................................................................25
2.3 Electronic Card Cage............................................................................................................................27
2.3.1 Front –Keypad and Display...............................................................................................27
2.3.2 Right Side –Terminal Blocks..............................................................................................28
2.3.3 Left Side - Terminal Blocks.................................................................................................29
2.3.4 Inside..........................................................................................................................................30
2.4 Hydran M2-X Sensor.............................................................................................................................31
2.4.1 Overview...................................................................................................................................31
2.4.2 Measurements Performed by the Sensor.....................................................................32
2.4.3 Sensor Temperature.............................................................................................................33
2.5 Heater Plate (Dynamic Oil Sampling System)..............................................................................33
3User Interface and Software ..................................................................................................................34
3.1.1 Using the Keypad Keys........................................................................................................35

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3.1.2 Operating Modes...................................................................................................................36
3.1.3 Changing the Value of a Parameter...............................................................................39
3.1.4 Scrolling Indicators ...............................................................................................................41
3.1.5 Passwords................................................................................................................................41
3.2 Setup Menu..............................................................................................................................................42
3.2.1 Alarms Setup...........................................................................................................................42
3.2.2 Date & Time.............................................................................................................................42
3.2.3 Relay Setup..............................................................................................................................43
3.2.4 Temp Setup .............................................................................................................................43
3.2.5 Calibration ...............................................................................................................................43
3.2.6 History Setup ..........................................................................................................................44
3.2.7 Comm Setup ...........................................................................................................................45
3.2.8 Readings Setup ......................................................................................................................47
3.2.9 I/O Setup...................................................................................................................................48
3.3 Alarms Menu ...........................................................................................................................................50
3.3.1 Current Alarms.......................................................................................................................50
3.3.2 Alarms Setup...........................................................................................................................50
3.3.3 Alarm History..........................................................................................................................55
3.4 View Readings Menu............................................................................................................................56
3.4.1 Actual Readings.....................................................................................................................56
3.4.2 View History Data..................................................................................................................57
3.4.3 Date & Time.............................................................................................................................59
3.5 Test Menu.................................................................................................................................................59
3.5.1 Sensor Test ..............................................................................................................................59
3.5.2 Relay Test.................................................................................................................................60
3.6 Service Menu...........................................................................................................................................61
3.6.1 Sensors Parameters.............................................................................................................61
3.6.2 Install New Sensor ................................................................................................................63
3.6.3 Sensor Test ..............................................................................................................................63
3.6.4 View Service Data .................................................................................................................63
3.6.5 System Config.........................................................................................................................63
3.6.6 Service History........................................................................................................................64
3.6.7 Software Version ...................................................................................................................65

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3.6.8 Sensor Card Status ...............................................................................................................65
4Verification, Installation and Configuration ......................................................................................66
4.1 Incoming Inspection.............................................................................................................................66
4.1.1 Reception and Unpacking..................................................................................................66
4.1.2 Shipping List ............................................................................................................................66
4.1.3 Inspection.................................................................................................................................67
4.1.4 Storage......................................................................................................................................68
4.2 Verification of Operation Prior to Installation..............................................................................68
4.2.1 Preparation..............................................................................................................................68
4.2.2 Setting the Date and Time .................................................................................................69
4.2.3 Verifying the Sensor’s Serial Number.............................................................................69
4.2.4 Verifying the State of the Gas Detector.........................................................................69
4.2.5 Verifying the Battery Voltage............................................................................................70
4.2.6 Verifying the Alarm Relays (If Used) ................................................................................70
4.2.7 Verifying the Standard TDM Signal (If Used) ................................................................71
4.2.8 Verifying the Analog Input(s) (If Used) ............................................................................71
4.2.9 Verifying the Analog Output(s) (If Used).........................................................................71
4.2.10 Verifying the RS-232 Communications (If Used) ....................................................72
4.2.11 Conclusion...........................................................................................................................72
4.3 Installation ...............................................................................................................................................73
4.3.1 Overview...................................................................................................................................73
4.3.2 Verifying the Serial Numbers ............................................................................................77
4.3.3 Preparing the Valve ..............................................................................................................79
4.3.4 Separating the Sensor from the Hydran M2-X ...........................................................79
4.3.5 Installing the Sensor onto the Valve...............................................................................81
4.3.6 Opening the Valve and Purging Air from the Sensor................................................83
4.3.7 Installing the Hydran M2-X on the Sensor....................................................................84
4.3.8 Grounding the Hydran M2-X Enclosure ........................................................................86
4.3.9 Installing the Cable Conduits ............................................................................................87
4.3.10 Installing the Cables.........................................................................................................89
4.3.11 Verifying the Hydran M2-X Operation .......................................................................92
4.4 Configuring the Hydran M2-X ...........................................................................................................92
4.4.1 Setting the Date and Time .................................................................................................92

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4.4.2 Setting the Parameters of the History Files .................................................................93
4.4.3 Setting the Alarm Parameters ..........................................................................................93
4.4.4 Verifying the Battery Voltage............................................................................................93
4.4.5 Setting the Dynamic Oil Sampling System Parameters ..........................................93
4.4.6 Setting the Readings Parameters....................................................................................94
4.4.7 Configuring the Analog Input(s) (If Used).......................................................................94
4.4.8 Configuring the Analog Output(s) (If Used) ...................................................................94
4.4.9 Verifying the Sensor .............................................................................................................95
4.4.10 Setting the Operation Mode of the Alarm Relays..................................................95
4.4.11 Verifying the Sensor Parameters.................................................................................95
4.4.12 Logging Values of the Service Data ...........................................................................95
4.4.13 Resetting the Hourly Trend, Daily Trend and Period B.........................................96
4.4.14 Conclusion...........................................................................................................................96
4.5 Commissioning.......................................................................................................................................97
5Communications and Networking .......................................................................................................98
5.1 Network Configuration Overview ....................................................................................................98
5.1.1 Local Communications with a Laptop Computer......................................................99
5.1.2 Remote Communications with a Host Computer (via Modem) ............................99
5.1.3 Remote Ethernet Communications With a Host Computer (via Copper
Wires or Fibre Optic)............................................................................................................................... 101
5.1.4 Hydran Host Communication Protocol ...................................................................... 101
5.2 Installing a Network........................................................................................................................... 102
5.2.1 Installing the RS-485 Network Link.............................................................................. 102
5.2.2 Configuring the Hydran M2-X’s Communication Parameters ........................... 103
5.2.3 Installing and Configuring a Laptop Computer....................................................... 103
5.2.4 Installing a Hydran 201i Controller .............................................................................. 104
5.2.5 Connecting a Hydran M2-X to the Hydran 201i Controller................................. 105
6Alarms ......................................................................................................................................................... 106
6.1 Introduction..........................................................................................................................................106
6.1.1 Setting Alarm Parameters............................................................................................... 106
6.1.2 Alarm Types.......................................................................................................................... 106
6.1.3 Alarm Conditions................................................................................................................ 107
6.1.4 Alarm Interface ................................................................................................................... 108
6.2 Gas and Moisture Alarm Conditions............................................................................................ 108

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6.2.1 Sources .................................................................................................................................. 109
6.2.2 High and High-High Conditions .................................................................................... 109
6.2.3 Detection of Alarm Conditions....................................................................................... 110
6.2.4 Setting the High Alarm Condition.................................................................................110
6.2.5 Gas Hourly and Daily Trend Alarm Conditions ........................................................111
6.3 System Fault Conditions...................................................................................................................113
6.3.1 Sources .................................................................................................................................. 114
6.3.2 System Fault Triggers .......................................................................................................114
6.4 Alarm Cancellation.............................................................................................................................116
6.5 Alarm Relays.........................................................................................................................................117
6.5.1 Alarm Contacts ...................................................................................................................117
6.5.2 States of Alarm Relays......................................................................................................118
6.5.3 Operation Modes of the Alarm Relays ........................................................................ 118
7Operation ................................................................................................................................................... 120
7.1 Operating Methods ............................................................................................................................120
7.1.1 Periodic, Visual Monitoring.............................................................................................. 120
7.1.2 Alarm Monitoring................................................................................................................121
7.1.3 Analog Outputs Monitoring ............................................................................................ 121
7.1.4 Combined Alarm and Analog Outputs Monitoring................................................. 122
7.1.5 Local Monitoring With a Laptop Computer ..............................................................122
7.1.6 Remote Monitoring With a Host Computer .............................................................. 123
7.2 Data Reading .......................................................................................................................................123
7.2.1 Direct Data Reading .......................................................................................................... 123
7.2.2 History Files Data Reading..............................................................................................124
8Troubleshooting....................................................................................................................................... 125
8.1 Alarm Messages that can be Displayed due to System Fault Conditions......................125
8.1.1 Battery L-Low Alarm ......................................................................................................... 125
8.1.2 Battery Low Alarm .............................................................................................................125
8.1.3 B.P. Temp Hi Alarm............................................................................................................. 126
8.1.4 B.P. Temp Low Alarm ........................................................................................................126
8.1.5 B.P. Tmp C. Open Alarm.................................................................................................... 126
8.1.6 B.P. Tmp C. Short Alarm.................................................................................................... 126
8.1.7 Gas C.Open Alarm..............................................................................................................127
8.1.8 Gas C. Short Alarm............................................................................................................. 127

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8.1.9 Gas Sens. Bad Alarm......................................................................................................... 128
8.1.10 S. Card Comm Err Alarm.............................................................................................. 128
8.1.11 S. Temp C. Open Alarm................................................................................................. 128
8.1.12 S. Temp Hi Alarm............................................................................................................ 129
8.1.13 S. Temp Low Alarm........................................................................................................ 129
8.1.14 S. Tmp C. Short Alarm................................................................................................... 129
8.2 RS-232 and RS-485 Communications......................................................................................... 130
8.2.1 No Communication when the Host or Laptop Computer is Connected
Directly or by Modem to the Hydran M2-X’s DB-9 Connector ................................................ 130
8.2.2 No Communication when the Host or Laptop Computer is Connected
Directly or by Modem to the Hydran 201Ci Controller’s DB-9 Connector........................... 130
8.2.3 No Communication between the Host Computer and the Network of
Hydran 201Ci Systems .......................................................................................................................... 131
8.3 Hydran M2-X and Hydran 201Ci Controller’s Analog Outputs at Zero............................131
8.4 Alarms..................................................................................................................................................... 132
8.4.1 Intermittent Gas Alarms................................................................................................... 132
8.4.2 An Alarm Relay does not Reset, even if the Alarm Condition has
Disappeared.............................................................................................................................................. 132
8.4.3 Irregular Gas Readings..................................................................................................... 132
8.4.4 Inaccurate Gas Readings ................................................................................................ 133
8.4.5 Moisture Reading of the Hydran M2-X does not correspond with that
of a Validation Method .......................................................................................................................... 133
8.4.6 Moisture Readings Remain at 0%................................................................................ 134
8.4.7 Irregular Readings (Moisture and Temperature)..................................................... 134
9Maintenance ............................................................................................................................................. 135
9.1 Cleaning the Enclosure Exterior .................................................................................................... 135
9.2 Replacing the Fuse.............................................................................................................................135
9.3 Replacing the Battery ....................................................................................................................... 136
9.3.1 Battery Specification......................................................................................................... 136
9.3.2 Battery Life ........................................................................................................................... 137
9.4 Periodic Maintenance ....................................................................................................................... 137
9.4.1 History Files Verification .................................................................................................. 138
9.4.2 Dissolved Gas Analysis (DGA)......................................................................................... 138
9.5 Maintenance Verification................................................................................................................. 140
9.5.1 Visual Inspection ................................................................................................................ 140
9.5.2 Heater, Display and Keypad Verification ................................................................... 141

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9.5.3 Parameter Verification .....................................................................................................141
9.5.4 Alarm Relays Verification (If Connected).................................................................... 141
9.5.5 Analog Inputs Verification (If Connected) ..................................................................142
9.5.6 Analog Outputs Verification (If Connected)...............................................................142
9.5.7 Sensor Tests ......................................................................................................................... 142
9.5.8 RS-232 Communications Verification......................................................................... 142
9.5.9 RS-485 Communications Verification (for a Network)........................................... 142
10 Decommissioning the Hydran M2-X................................................................................................. 143
10.1 Powering-off.........................................................................................................................................143
10.2 Cable Disconnection..........................................................................................................................143
10.3 Removing the Hydran M2-X............................................................................................................144
Appendix A. Technical Specifications for the Hydran M2-X ....................................................................... 145
A-1. General...................................................................................................................................................145
A-2. Dimensions ...........................................................................................................................................149
A.2.1. Enclosure Dimensions ...............................................................................................................149
A.2.2. Optional Adaptors Dimensions ..............................................................................................151
A.2.3. Maximum Dimensions...............................................................................................................153
Appendix B. Installation Checklist ......................................................................................................... 154
Appendix C. Functional Block Diagram............................................................................................... 165
Appendix D. External Connections........................................................................................................ 166
D-1. TDM and RS-485 Network Link Terminal Block........................................................................166
D-2. Analog Input Terminal Block...........................................................................................................170
D-3. Analog Output Terminal Blocks.....................................................................................................172
D-4. “4-20” mA ..............................................................................................................................................174
D-5. Limitations.............................................................................................................................................174
D-6. Converting Current to Voltage.......................................................................................................175
D-7. AC Power Supply Terminal Block and External Ground Lug ...............................................175
D-8. Alarm Contacts Terminal Block .....................................................................................................177
Appendix E. Installing I/O Modules ....................................................................................................... 179
Appendix F. Upgrading the Embedded Programs (Firmware).................................................... 181
Appendix G. Replacing the Battery ....................................................................................................... 184
Appendix H. History File Messages ....................................................................................................... 186
Appendix I. Alarm Messages ................................................................................................................. 190
Appendix J. Extracting an Oil Sample ................................................................................................. 193
Appendix K. Unit Conversions................................................................................................................. 194
K-1. Analog Outputs –Converting ppm to mA (or Vice Versa).....................................................194
K-2. Moisture Level and Relative Humidity (Converting to ppm Concentration)...................194
Appendix L. Other Products and Accessories................................................................................... 197
L-1. Hydran 201C-i-C Communications Controller .........................................................................197
L-2. Vibration-Absorbing Rubber Pads................................................................................................197
Appendix M. Glossary ................................................................................................................................. 199

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Hydran* M2-X Instruction Manual
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Copyright Notice and Proprietary Rights
© 2003-2018, GE. All rights reserved.
The contents of this manual and the information contained herein are the
exclusive property of GE, except as otherwise indicated.
You may not disclose, reproduce, publish, license, post, transmit or distribute this
manual, in whole or in part, without the prior written permission of GE or except as
permitted by written license agreement with GE.
GE has made every reasonable attempt to ensure the completeness and
accuracy of this manual. However, the information contained in this manual is
subject to change without notice, and does not represent a commitment on the part
of GE.
Any included or attached hardware schematics and technical descriptions, or
software listings that disclose source code, are for information purposes only.
Reproduction, in whole or in part, to create working hardware or software for other
than GE products is strictly prohibited, except as permitted by written license
agreement with GE.
Trademark Notices
GE, Hydran and are trademarks and service marks of General Electric Company.
Access, Microsoft and Windows are trademarks or registered trademarks of
Microsoft Corporation in the United States and/or other countries.
Other company or product names mentioned in this document may be trademarks
or registered trademarks of their respective companies.
Customer Service
For information on Grid Solution products, please contact:
GE Grid Solutions (UK) Ltd
Lissue Industrial Estate East
Lissue Walk, Lisburn, BT28 2LU, United Kingdom
Tel: [phone]
Fax: [phone]
Email: [email protected]
Web: www.gegridsolutions.com/md.htm
For help and support for your Hydran* M2-X, please contact the GE Customer Service
Center. Open 24 hours a day, 365 days a year.
Tel: [phone] (United States and Canada)
Tel: [phone] (worldwide)
Email: [email protected]

Hydran* M2-X Instruction Manual
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MA-029 Rev. 1.0, 30-Jul-18
Safety Warnings In Six Languages
[EN] (in English) WARNINGS:
•All procedures in this manual must be strictly adhered to.
•Any deviation from these could cause irreversible damage to the transformer
being monitored and/or the Hydran M2-X, and could lead to property damage,
personal injury and/or death.
•Installation and maintenance of the Hydran M2-X must be carried out by qualified
personnel only. Please advise station operator prior to maintenance. Working
inside the Hydran M2-X may trigger unwanted alarms due to parameter changes,
power shutdown, and system rebooting or electrostatic discharge.
•For a maximum distance of 15 m (50 ft) from the power source, use a 2.08 mM2-X
(14-AWG) cable and an overcurrent protection.
[FR] (in French) ATTENTION:
•Toutes les procédures dans ce manuel doivent être observées rigoureusement.
•Tout écart par rapport à celles-ci pourrait causer des dommages irréversibles au
transformateur surveillé et/ou au Hydran M2-X, et pourrait entraîner des
dommages à la propriété, des blessures corporelles et/ou la mort.
•L'installation et l'entretien du Hydran M2-X doivent être effectués par du personnel
qualifié seulement. Veuillez aviser l'opérateur du poste avant l'entretien. Travailler
à l'intérieur du Hydran M2-X peut déclencher des alarmes non voulues en raison
de changements à des paramètres, d'arrêt de l'alimentation, de remise en marche
du système ou de décharge électrostatique.
•Pour une distance maximale de 15 m (50 pi) de la source d'alimentation, utiliser un
câble de 2,08 mM2-X (14-AWG) et une protection contre les surintensités.
[ES] (in Spanish) ADVERTENCIA:
•Se debe cumplir estrictamente con todos los procedimientos señalados en este
manual.
•Cualquier desviación al respecto puede causar daños irreparables al
transformador que está bajo monitoreo y/o al Hydran M2-X, asimismo puede ser
causa de daños materiales, lesiones corporales y/o muerte.
•La instalación y mantenimiento del equipo Hydran M2-X se reserva únicamente al
personal perfectamente cualificado. Aconseje por favor a operador de la estación
antes del mantenimiento. El trabajo dentro del Hydran M2-X puede accionar

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Hydran* M2-X Instruction Manual
MA-029 Rev. 1.0, 30-Jul-18
alarmas indeseadas debido a los cambios del parámetro, parada de la energía,
sistema que reanuda o descarga electrostática.
•Para una distancia máxima de 15 m (50 pies) de la fuente de alimentación, utilice
un cable de 2,08 mM2-X (14-AWG) y una protección contra las sobrecargas de
corriente.
[DE] (in German) WARNUNG:
•Alle Abläufe in diesem Handbuch müssen strengstens befolgt werden.
•Jede Abweichung davon könnte dem zu überwachenden Transformator und/oder
dem Hydran M2-X unwiderrufliche Schäden zufügen, und könnte zu Sachschaden,
Personenverletzung und/oder Tod führen.
•Installation und Wartung des Hydran M2-X dürfen daher nur von qualifiziertem
Personal durchgeführt werden. Verständigen Sie bitte den Bediener der
Schaltanlage vor der Wartung. Das Arbeiten innerhalb des Hydran M2-X kann
aufgrund von Parameteränderungen, Spannungsabschaltung, Neubooten des
Systems oder elektrostatischer Entladung unerwartete Alarme auslösen.
•Für eine maximale Entfernung von 15 m von der Spannungsquelle, verwenden
Sie ein 2,08 mM2-X Kabel (14 AWG) und ein Überstromschutz.
[IT] (in Italian) ATTENZIONE:
•Tutte le procedure del presente manuale dovranno essere eseguite in totale
conformità.
•Qualsiasi deviazione dallo stesso manuale potrebbe causare danni irreversibili al
trasformatore sotto monitoraggio e/o all’ Hydran M2-X, e potrebbe causare danni
alla proprietà, lesioni personali e/o alla morte.
•L’installazione e la manutenzione del Hydran M2-X devono essere eseguite solo ed
esclusivamente da personale qualificato. Avissare l’operatore della stazione prima
di manutenzione. Funzionando all’interno del Hydran M2-X può fare scattare degli
alarmi indesiderabili e cambiamenti dei parametri, arresto dell’alimentazione, un
“reboot” del sistema o scarico elettrostatico.
•A una distanza massima di 15 m dalla fonte di energia usare un cavo 2.08 mM2-X
(14-AWG) e una protezione di sovracorrente.

Hydran* M2-X Instruction Manual
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MA-029 Rev. 1.0, 30-Jul-18
[SV] (in Swedish) VARNING:
•Alla procedurer i manualen måste följas noggrant.
•Varje avvikelse från dessa procedurer kan orsaka oåterkalleliga skador på den
övervakade transformatorn och/eller på Hydran M2-X samt leda till
egendomsförlust, personskada och/eller livsfara.
•Installation och underhåll av Hydran M2-X måste utföras av behörig personal. Råd
var god posterar operatören före underhåll. Funktionsduglig insida Hydran M2-X
kan starta oönskade parameterändringar för larm tack vare, driver avstängning,
systemomstart eller elektrostatisk urladdning.
•För ett maximalt avstånd på 15 m från kraftuttaget, använd 2,08 mM2-X kabel (14-
AWG) och ett överströmsskydd.
Safety Symbols Description
Description of safety symbols used on the Hydran M2-X device:
Refer to the Instruction Manual to prevent injury or damage to
equipment.
Hazardous voltages may be present.
Protective earth connection.
Description of safety messages used in this Instruction Manual:
A procedure, practice, or condition that could cause equipment
damage or permanent loss of data, if not adhered to.
A procedure, practice, or condition that could cause bodily
injury or death, if not adhered to.
CAUTION
WARNING

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Hydran* M2-X Instruction Manual
MA-029 Rev. 1.0, 30-Jul-18
Preface
This manual provides a complete reference for the Hydran M2-X, which is a
unique, continuous, on-line monitor of combustible gases and moisture in dielectric
oils.
The information in this manual may be used by:
•Purchaser or specifier
•Installation planner
•Operator
•Commissioning manager
•Person responsible for collecting the readings
•Maintenance technician
•Troubleshooting technician
•All procedures in this manual must be strictly adhered to.
Any deviation from these may cause irreversible damage to
the transformer being monitored and/or the Hydran M2-X,
and may lead to property damage, personal injury and/or
death.
•Installation and maintenance of the Hydran M2-X must be
carried out by qualified personnel only.
This manual is not a tutorial on combustible gases or water in dielectric oil. It is
assumed that the reader is already familiar with these subjects. However, forms of
water in oil are summarized in Section 2.1.2.
To simplify the text, the following expressions are used:
•“Supervisory control and data acquisition” (SCADA) is used to identify the
numerous devices (control panel, alarm panel, retransmission unit,
display, terminal, data recorder, external detection device, etc.) on which
can be connected the Hydran M2-X.
•“Sensor” refers to the cylindrical brass assembly that encases the gas
detector and humidity sensor.
This manual is written for the 0–2,000 ppm operating range only. This range is
the one used by most Hydran M2-X’s. Should your Hydran M2-X(’s) use a different
operating range, please convert the values (in doubt, contact the General Electric
Customer Service; the coordinates can be found at the bottom of page 9).
To help the reader, a Table of Contents is at the beginning of the manual, along
with a Glossary in Appendix M at the end of the manual.
The names of menus, options, parameters, etc., shown on the Hydran M2-X’s
display are displayed in bold characters; for example: the Main Menu. The Hydran
WARNING

Hydran* M2-X Instruction Manual
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MA-029 Rev. 1.0, 30-Jul-18
M2-X’s menus and options are sorted according to a tree structure; to indicate the
path from the Main Menu to a submenu, an option or a parameter, the symbol “>” is
used to separate each level (“branch” of the tree). In the example Setup > Reading
Setup > Gas Reading Setup, these steps must be followed to navigate from the Main
Menu to the Gas Reading Setup options:
1. From the Main Menu, select Setup.
2. From Setup, select Reading Setup.
3. From Reading Setup, select Gas Reading Setup.
The Hydran M2-X Instruction Manual (this manual), the Hydran M2-X Installation
Guide are located in PDF format in the English/Manuals folder of the Hydran M2-X
installation CD. Hard copies of each manual can be purchased from General Electric.
Standard GE Warranty
The products covered by this manual and manufactured by GE (“Products”) are
warranted to be free from defects in material, workmanship and title at the time of
delivery. Any components of a Product or other products manufactured by persons
other than GE carry only the warranty provided by the manufacturers thereof and GE
gives no warranty on behalf of the manufacturers of such products.
GE warrants the Products until one (1) year from first use or eighteen months (18)
months from delivery, whichever occurs first, except that software is warranted for
ninety (90) days from delivery.
GE represents and warrants that any software and firmware covered by this
manual is free from functional deficiencies. If any functional deficiencies are
discovered and are reported to GE within the Warranty Period, GE agrees to use due
diligence to correct such deficiencies within 30 days after receipt of such notification.
Upon receiving such notice, GE may lend telephone support or patches. If the
reported deficiencies cannot be eliminated within 30 days, the Buyer may request,
and GE shall then furnish, monthly status reports to the Buyer regarding the
progress of GE’s efforts to correct such functional deficiencies.
If Products covered by this manual do not meet the above warranties during the
applicable Warranty Period, the Buyer shall promptly notify GE in writing but not
later than 30 days and make the Products available promptly for correction. GE shall
thereupon correct any defect by, at its option, repairing the defective Products or
making available necessary replacement parts.
Any failure which is the basis for a warranty claim shall not be cause for
extension of the duration of the applicable Warranty Period. GE shall not be
responsible for removal or replacement of systems, structures or other parts of the
Buyer’s facility. If a defect in Products or part thereof cannot be corrected by GE’s
reasonable efforts, the parties shall negotiate an equitable adjustment in price with
respect to such Products or part thereof. All decontamination work necessary for

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MA-029 Rev. 1.0, 30-Jul-18
the correction of defects shall be performed by the Buyer at the Buyer’s expense.
The condition of any tests shall be mutually agreed upon and GE shall be notified of
and may be represented at all tests that may be made.
GE does not warrant Products or any repaired or replacement parts against
normal wear and tear, including that due to environment or operation, including
excessive operation at peak capability, frequent starting, type of fuel, detrimental air
inlet conditions, or erosion, corrosion or material deposits from fluids, or which have
been involved in an accident. The warranties and remedies set forth herein are
further conditioned upon:
•Proper storage, installation, operation and maintenance of the Buyer’s
equipment and conformance with the instruction manuals (including revisions
thereto) provided by GE and/or its subcontractors, as applicable.
•Repair or modification pursuant to GE’s instructions or approval.
The Buyer shall keep proper records of operation and maintenance during the
applicable Warranty Period. These records shall be kept in the form of log sheets
and copies shall be submitted to GE upon its request in connection with a warranty
claim by the Buyer. GE does not warrant any products or services of others
designated by the Buyer where such products or services are not normally supplied
by GE.
The preceding paragraphs set forth the exclusive remedies for all claims based
on failure of or defect in Products covered by this manual, whether the failure or
defect arises before or during the applicable Warranty Period and whether a claim,
however instituted, is based on contract, indemnity, warranty, tort (including
negligence) or civil liability, strict liability or otherwise. The foregoing warranties are
exclusive and are in lieu of all other warranties and guarantees whether written, oral,
implied or statutory. NO IMPLIED STATUTORY WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE SHALL APPLY.

Hydran* M2-X Instruction Manual
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MA-029 Rev. 1.0, 30-Jul-18
1General Warnings
Mishandling of the Hydran M2-X sensor (such as a
perforation or scratch on the membrane or subjecting the
sensor to paint or solvent) voids the warranty.
1. Do not remove the plastic cap from the sensor’s threaded extremity until the
sensor is installed on the valve (see Figure 1-1). This cap protects the threads and
the sensor from debris and sharp objects. If the sensor is unmounted, place
immediately the cap onto its threads.
Figure 1-1: Plastic Cap Must Remain in Place Until the Sensor Is Installed on the Valve
WARNING

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Hydran* M2-X Instruction Manual
MA-029 Rev. 1.0, 30-Jul-18
2. Do not touch the membrane located inside the threaded extremity of the sensor
with a finger or an object (see Figure 1-2). The membrane is easily impaired;
impairing the membrane damages the sensor permanently, thus voiding the
warranty.
Figure 1-2: Do Not Touch the Sensor’s Membrane with a Finger or an Object
3. Do not block the sensor’s breathing hole or puncture the breathing hole’s
membrane (see Figure 1-3). Located above the sensor’s connector, this opening
provides oxygen to the gas detector (inside the sensor). Blocking this opening or
puncturing its membrane damages the sensor permanently, thus voiding the
warranty
Figure 1-3: Do Not Block the Sensor’s Breathing Hole or Puncture the Breathing Hole’s Membrane

Hydran* M2-X Instruction Manual
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MA-029 Rev. 1.0, 30-Jul-18
4. Install the Hydran M2-X horizontally; not at an angle, vertically or horizontally
using an elbow (see Figure 1-4). For details pertaining to the positioning of
Hydran M2-X’s,see Section 4.3.1.2.
Figure 1-4: Do Not Install the Hydran M2-X at an Angle, Vertically or Using an Elbow
5. Do not install the Hydran M2-X on elbows or fitting boxes (see Figure 1-5). Elbows
may cause turbulence that can affect the accuracy of gas level readings.
Figure 1-5: Do Not Install the Hydran M2-X on an Elbow or a Fitting Box
6. Do not install the Hydran M2-X on the inlet side of the radiator pump (see Figure
1-6).

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Hydran* M2-X Instruction Manual
MA-029 Rev. 1.0, 30-Jul-18
Figure 1-6: Do Not Install the Hydran M2-X on the Inlet Side of the Radiator Pump
7. Do not subject the Hydran M2-X or its sensor to high-pressure water streams (see
Figure 1-7). High-pressure streams used to clean transformers may cause
serious damage.
Figure 1-7: Do Not Subject the Hydran M2-X or Its Sensor to High-Pressure Water Streams

Hydran* M2-X Instruction Manual
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MA-029 Rev. 1.0, 30-Jul-18
8. Do not paint the sensor (see Figure 1-8). Paint fumes block the sensor’s breathing
hole. Blocking this opening damages the sensor permanently, thus voiding the
warranty.
Figure 1-8: Do Not Paint the Sensor or Clean It with Any Solvent
9. Do not use hydrocarbon-based volatile compounds near the sensor; do not clean
the sensor with any solvent or other products (see Figure 1-8). The volatile fumes
of these compounds can deteriorate sensor performances. Products to avoid
include: paint, liquid Teflon, close vehicle exhaust, spray can, black pitch, thinner,
RTV (Room Temperature Vulcanization; silicon-based mastic) and solvent.
10. Do not use galvanized fittings to install the sensor. Galvanized fittings (pipes,
reducing bushing, rings, etc.) may react with the oil, consequently resulting in
higher readings of gas level. Similarly, do not use galvanized fittings on
transformer valves used for oil sampling.
11. Do not separate the Hydran M2-X’s from their respective sensor. The Hydran M2-X
is set at the factory for a specific sensor. To verify if the sensor and Hydran M2-X
are paired correctly, consult the serial numbers indicated on the shipping box
and/or the Test Certificate and Data Sheet (for an example, see Figure 3-12). The
sensor’s serial number is located below the sensor connector (see Figure 2-7); the
Hydran M2-X’s serial number is located on its back (external side of the heater
plate).
Turn off the electric power at the fuse box or
service panel before making any electrical
connections, and ensure a proper ground connection
is made before connecting line voltage. Failure to do
WARNING