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MA-029 Rev. 1.0, 30-Jul-18
GE Grid Solutions, Lissue Industrial Estate East,
Lissue Walk, Lisburn, BT28 2LU, United Kingdom
Tel: +44 (0) 28 9262 2915,
Fax: +44 (0) 28 9262 2202
Email: ge4service@ge.com
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
1 General Warnings ...................................................................................................................................... 16
2 Introduction 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
3 User 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
4 Verification, 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
5 Communications 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
6 Alarms ......................................................................................................................................................... 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
7 Operation ................................................................................................................................................... 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
8 Troubleshooting ....................................................................................................................................... 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
9 Maintenance ............................................................................................................................................. 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: +44 28 9262 2915
Fax: +44 28 9262 2202
Email: ge4service@ge.com
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: +1 800 361 3652 (United States and Canada)
Tel: +1 514 420 7460 (worldwide)
Email: ge4service@ge.com
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Hydran* M2-X Instruction Manual
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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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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.
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[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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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
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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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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.
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1 General 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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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
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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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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
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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
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so can result in property damage, personal injury
and/or death.
12. The surface of the base plate can be hot. Heating for the dynamic oil sampling
system (Section 2.5) is achieved using heating resistors mounted on the internal
side of the base plate.
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2 Introduction to the Hydran M2-X
2.1 Overview
The Hydran M2-X is an intelligent, on-line monitoring system that measures the
level of combustible gases and moisture in dielectric oil for the evaluation of
dangerous conditions, bubbling temperature and aging rate, and for the early
detection of incipient faults in trans-formers (or any other oil-filled electrical
equipment).
The Hydran M2-X consists of a Type NEMA 4X enclosure (Figure 2-1) easily
installed on one of the valves of the equipment to be monitored.
Figure 2-1: Hydran M2-X's Enclosure
The Hydran M2-X’s user interface (Figure 2-2) consists of an eight-key membrane
keypad and a 128 x 64 pixels, backlit liquid crystal display (LCD) to use the Hydran
M2-X as a stand-alone unit. For more information on the user interface, see Chapter
3.
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Figure 2-2: User Interface of the Hydran M2-X
Note: Although the Hydran M2-X’s user interface can be used to perform all
required tasks (some of the set-up functions can be performed only from the user
interface), it is recommended to connect (using an RS-232 link) the Hydran M2-X to a
laptop computer running the Perception software. This software provides an easier
and friendlier environment to perform the same tasks.
2.1.1 Gas Detection
The Hydran M2-X’s sensor is equipped with a gas detector that is sensitive to the
four gases that are the primary indicators of incipient faults in oil-filled electrical
equipment:
• Hydrogen (H
2
)
• Carbon monoxide (CO)
• Ethylene (C
2H4
)
• Acetylene (C
2H2
)
Note: The gas detector measures a composite value of the above dissolved gases
in oil.
For information on how to compare the Hydran M2-X’s gas level reading with a
DGA, see Section 9.4.2.
2.1.2 Moisture Detection
The Hydran M2-X’s sensor is equipped with a thin-film capacitive sensor that
measures the moisture in oil. Water exists in oil in four forms:
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• Dissolved: Water dissolved in oil and available to move from the oil to the air
or to the solid insulation in the transformer to reach equilibrium.
• Bound: Water chemically bonded to polar molecules such as by-products of
oxidation, and to synthetic anti-oxidants. Although this water is not readily
available to move in and out of the oil, it will to some extent.
• Oversaturated: This water in a free state is present in the oil in a concentra-
tion exceeding the solubility of water in oil and is, in effect, saturating the oil.
• Water bonded to cellulose and metal particles in suspension in oil.
The conventional Karl Fischer titration method measures the total water content
in oil in ppm (the sum of all four forms of water in oil). The moisture sensor provides
essentially the measurement of water dissolved in the oil.
2.1.3 Optional I/O Interfaces
Up to four optional I/O interfaces can be installed. Available types are:
• 4–20 mA analog input
• 4–20 mA analog output
Any combination is allowed. For more information, see item 3 on page 28.
2.1.4 Backward Compatibility with Hydran Products
General Electric’s Hydran products line also includes the Hydran 201Ti Intelligent
Transmitter (H201Ti) and the Hydran 201Ci Controllers, a generic term that
encompasses the three Hydran Controllers:
• Hydran 201Ci-C Communications Controller (H201Ci-C)
• Hydran 201Ci-1 One-Channel Controller (H201Ci-1)
• Hydran 201Ci-4 Four-Channel Controller (H201Ci-4)
The H201Ti and Hydran Controllers can be combined in various ways to form a
Hydran 201i System. To summarize, a Hydran 201i System is either a H201Ti used
alone or the combination of at least one H201Ti and a Hydran 201Ci Controller. The
Hydran 201R Model i is a specific configuration of Hydran 201i System, which
consists of one H201Ti linked to a H201Ci-1.
The Hydran M2-X also includes controller functions. The Hydran M2-X is designed
to be compatible with the communication features of the three Hydran 201C i
Controllers. A Hydran M2-X can therefore replace a H201Ti in any Hydran 201i
System and communicate with the Perception software using a laptop computer.
Note: The H201Ci -1 and H201Ci-4 can only display the gas level reading of the
Hydran M2-X, not the humidity level. They are also limited to two alarm levels: gas
High and High-High (Alarm 1 and Alarm 2 of the Hydran M2-X).
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2.1.5 Possible Configurations
The Hydran M2-X can be used in three configurations:
• As a stand-alone unit (using its keypad and display, or the Perception software
running on a laptop computer).
• In a network of up to 32 Hydran M2-X’s. Network communications are performed
through an isolated RS-485 link. Networking is described in Chapter 6.
• As a replacement for a Hydran 201Ti in any Hydran 201i System.
2.1.6 Other Features
• Several adjustable alarm conditions relative to gas detection, moisture detection,
analog inputs and system faults.
• Six history files (automatic recording of data): Short Term, Long Term, Events,
Alarms, Service and Sensor card.
• Semimonthly, automatic sensor test and state report.
• Dynamic oil sampling, a pumpless sampling system using thermal convection
cycles.
• Terminal blocks to connect the following items:
– ac power supply.
– Five alarm contacts (four are configurable, and one is assigned to system
fault alarm conditions).
– TDM signal for backward compatibility with Hydran 201Ci controllers (gas
reading).
– Optional I/O interfaces.
– Input and output for RS-485 network link.
• An RS-232 connector for local communications with the Perception software.
• An extremely high immunity to electrical surges, radio-frequency interferences
and electrostatic discharges.
• A very wide temperature range for all-weather outdoor operation.
• Accessories are also available (see Appendix L)
For more details, see the technical specifications in Appendix A.
2.2 External Components
For detailed information on the dimensions of the Hydran M2-X’s enclosure, see
Section A.2.1.
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Figure 2-3: External Pats of the Hydran M2-X
The enclosure is composed of the following parts (see Figure 2-3):
1. Cover: The cover provides mechanical and weather protections for the
sensor and electronic card cage (see Figure 2-4).
2. Cover screws: Four screws maintain the cover in place. The cover can be
easily removed to access the electronic card cage.
3. Gasket: This gasket renders the joining of the cover and heater plate
impermeable to water.
4. Heater plate: The heater plate accommodates the dynamic oil sampling.
The dynamic oil sampling system is carefully controlled to generate oil
convection and ensure accurate gas readings. For details, see Section 2.5.
The surface of the base plate can be hot. Heating
for the dynamic oil sampling system (see Section
2.5) is achieved using heating resistors mounted
on the internal side of the base plate.
5. Membrane vent: Air penetrates through the watertight membrane vent
and inside the Hydran M2-X. The gas detector requires air to function
properly.
6. Conduit fittings: Up to six watertight, non-conducting conduit fittings can
be mounted on the heater plate. They are used to install standard,
watertight, flexible (recommended) or rigid steel conduits. The conduit
fittings are made of non-conducting material (plastic) to prevent problems
caused by ground loops through the conduits (for example, if the
transformer tank is grounded at a single point and monitored
continuously for tank-to-ground currents).
CAUTION
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All metallic conduits or cable shields must be connected to
the ground at one point.
7. Sensor clamp: To secure the sensor.
8. Sensor: See Section 2.4.
9. Ground lug: To ground the Hydran M2-X.
The enclosure must be grounded
10. Display window: The cover has a window to see the display. The display,
along with the keypad, is located on the front of the electronic card cage.
To access the display and keypad, the cover must be removed. For more
information on the display and keypad, see Chapter 4.
Figure 2-4: Interior of the Hydran M2-X
2.3 Electronic Card Cage
The user interface (display and keypad), terminal blocks, fuse holder and
connectors are all mounted on the exterior of the electronic card cage (see Figure
2-4).
2.3.1 Front – Keypad and Display
CAUTION
WARNING
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The Hydran M2-X’s user interface (see Figure 2-2) consists of an eight-key
membrane keypad and a 128 x 64 pixels, backlit liquid crystal display (LCD) to use the
Hydran M2-X as a stand-alone unit. For more information on the user interface, see
Chapter 3.
2.3.2 Right Side – Terminal Blocks
The following connectors and terminal blocks are mounted on the right side of
the electronic card cage (when facing the display; see Figure 2-5):
Figure 2-5: Right Side of the Electronic Card Cage
1. DB-9 connector for RS-232 link: This surge-protected, male connector
allows local RS-232 communications between the Hydran M2-X and a
laptop computer running the Perception software. For details, see
Chapter 5.
2. TDM and RS-485 terminal block: This terminal block is used to connect
the following signals (from left to right; for wiring details, see Section D-1):
• Terminals 1 to 4: Standard TDM (time division multiplexing) signal. This
TDM signal is provided for backward compatibility with the Hydran
201Ti; see the Hydran 201i System Instruction Manual. This TDM signal
transmits two pieces of information:
– The percentage of gas level (where 100 % is 2,000 ppm for the
standard model).
– The state of the alarm relays 1 and 2.
• Terminals 5 to 12: RS-485 network link input and output signals. These
signals are used to connect two or more Hydran M2-X’s in a daisy
chain configuration to form a network. The network can be connected
temporarily through the DB-9 connector to a laptop computer running
the Perception software. For information on networking, see Chapter
5.
3. Two optional I/O interfaces: The following interfaces are available (any
combination is allowed):
• 4–20 mA general-purpose isolated input: The Hydran M2-X can
monitor up to four analog inputs. These analog inputs are typically
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used to monitor various transformer parameters (top oil temperature,
load current, etc.). For wiring details, see Section D-2.
• 4–20 mA analog output: Isolated (up to 2,500 Vac) current output that
can supply a load up to 500 (10 V maximum). This analog output is
typically monitored by a SCADA system. For general and wiring
details, see Section D-4. To convert ppm to mA, see Section K-1.
Note: Each I/O interface is identified by a label on its connector.
Note: When ordered with the Hydran M2-X, optional I/O interfaces are added to the
Hydran M2-X at the General Electric’s plant before shipping. To add an I/O interface
after the assembly of the Hydran M2-X is completed, see Appendix E.
2.3.3 Left Side - Terminal Blocks
The following items are mounted on the left side of the electronic card cage
(when facing the display; see Figure 2-6:
1. Temporary plug: This plug must be removed and replaced with a
watertight fitting to connect the ac power supply cable (see Section
4.3.10.6).
2. AC power supply terminal block: The power supply is connected to the
three terminals at the top of this terminal block. The three terminals at
the bottom are connected to the three wires of the line filter located inside
the electronic card cage. For wiring details, see Section D-7.
Note: The external ac power supply range is 90-132Vac or 180-264Vac, and
from 47 to 63 Hz.
3. AC power supply fuse: The Hydran M2-X includes one fuse holder. For
the technical specifications, see section 9.2.
4. Alarm contacts terminal block: This terminal block is used to connect the
Hydran M2-X’s five SPDT (single pole double throw) alarm relays to a
SCADA system. Each relay requires three terminals; for wiring details, see
Section D-8. The first four sets of alarm contacts (terminals 1 to 12) can be
assigned to different alarm conditions (see Section 3.3); the last set of
alarm contacts (terminals 13 to 15) is always assigned to the system fault
alarm conditions. For more information on alarms and relays, see Chapter
6.
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5. Expansion port: Not used. This is used in Hydran S2 only.
Figure 2-6: Left Side of the Electronic Card Cage
2.3.4 Inside
The electronic card cage contains the circuit boards (CPU, sensor card, etc.) and
the battery.
2.3.4.1 Battery
The Hydran M2-X’s battery is used to keep the real-time clock functioning and to
retain the parameter values and data of the history files when the ac power is not
available. For the specifications, see Section 9.3; should you need to replace the
battery, see Appendix G.
2.3.4.2 Internal Real Time Clock
An internal real-time clock (RTC) provides a calendar and a permanent clock,
unless the battery is disconnected. The clock uses a crystal oscillator as its time
base; its 0.01 % accuracy (four minutes per month) is independent of the ac power
supply frequency. The calendar accounts automatically for leap years (366-day
year).
To set the Hydran M2-X’s date and time, see Section 3.4.3.
The Hydran M2-X’s internal clock manages the following functions:
1. Temporary
Plug
2. AC Power Supply
Terminal Block
3. AC Power Supply
Fuse
4. Alarm Relays
Terminal Block
5. Expansion Port
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• History files date stamp (see Section 3.4.2)
• Delays of all alarm conditions (see Section 3.2.1)
• Semimonthly, automatic sensor tests (see Section 3.5)
2.3.4.3 Non Volatile Memory
The nonvolatile memory allows the Hydran M2-X to retain its data even during
the following events:
• Disconnection of the Hydran M2-X’s battery.
• Failure of the ac power supply.
• Update of the Hydran M2-X’s embedded software.
The Hydran M2-X’s nonvolatile memory is used to retain the following data:
• Setup > Temperature Setup
• Service > Sensor Param
• View Readings > View History > View Sensor Card History
2.4 Hydran M2-X Sensor
Never touch the gas detector or moisture sensor inside the
Hydran M2-X sensor. Touching them may damage the
Hydran M2-X sensor and void the warranty.
2.4.1 Overview
The Hydran M2-X sensor is composed of a permeable-membrane gas detector
and a thin-film capacitive humidity sensor.
The Hydran M2-X sensor (see Figure 2-7) is made of brass. It consists of the
following parts:
Figure 2-7: Parts of the Hydran M2-X Sensor
1. O-ring: To assure the water tightness of the enclosure.
CAUTION
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2. Sampling port: See the bleed screw (item 3 below). The sampling port fits the
Luer stopcock valve of a DGA syringe.
3. Bleed screw: The bleed screw and sampling port (item 2 above) are used to
purge the air from the sensor during the installation and to sample oil for
Dissolved Gas Analysis (DGA). The oil sampling procedure is described in
Appendix J.
4. 1.5-in NPT male threads: They are used to mount the Hydran M2-X directly
on an open-bore valve of a transformer or any other oil-filled electrical
equipment. The gas detector and moisture sensor are both mounted inside
the sensor’s threaded extremity.
5. Sensor’s serial number: The serial number is also specified on the Test
Certificate and Data Sheet (for an example, see Figure 3-12). Sensors are
identified with a serial number as each one is unique and comes with a
different set of calibration parameters.
Note: Each Hydran M2-X is configured for a specific sensor. If several Hydran
M2-X’s are received, take the necessary precautions not to swap the sensors
and Hydran M2-X’s.
6. Connector: To link the sensor to the electronic card cage.
7. Breathing hole: Air penetrates through the watertight membrane vent (see
item 5 in Figure 2-3) and inside the Hydran M2-X, and the breathing hole
allows the air to reach the gas detector (inside the sensor). The gas detector
requires air to work properly.
8. Twist-and-lock mechanism: This twist-and-lock feature is no longer used to
attach the Hydran M2-X enclosure and the sensor together. This has been
replaced by a clamp mechanism. Refer to Figure 4-3. The Hydran M2-X
enclosure can be replaced without removing the sensor from the valve.
2.4.2 Measurements Performed by the Sensor
The sensor continuously makes three measurements:
• Gas level: Gas detection is based on combustible gases dissolved in the oil
passing through a selectively gas-permeable membrane into an
electrochemical gas detector (located inside the sensor). Within the gas
detector, the gases combine with oxygen (from ambient air) to produce an
electrical signal that is measured by an electronic circuit and converted to
ppm. The gas detector is sensitive to the gases that are the primary
indicators of incipient faults in oil-filled electrical equipment:
– Hydrogen (H
2
)
– Carbon monoxide (CO)
– Ethylene (C
2H4
)
– Acetylene (C
2H2
)
• Moisture level: Moisture detection is performed by a thin-film capacitive
moisture sensor. The capacitive value of this sensor varies according to the
moisture level. This value is converted to an electrical signal that is
digitalized for reading by the CPU.
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• Sensor temperature: A thermistor is included within the sensor to measure
its temperature.
Note: The Hydran M2-X also measures the heater plate temperature using
thermistors mounted inside the heater plate; see Section 2.5.
2.4.3 Sensor Temperature
For the recommended operating temperature range of the sensor, see the
technical specifications in Appendix A. The sensor temperature is controlled by the
dynamic oil sampling system of the heater plate (see Section 2.5). The external
factors that affect the sensor temperature are:
• Ambient air temperature surrounding the Hydran M2-X.
• Oil temperature behind the valve on which the Hydran M2-X is mounted
Note: A system fault alarm condition is detected when the sensor temperature is
outside the operating limits. For more information, see Section 3.3.2.6 and Section 6.3.
2.5 Heater Plate (Dynamic Oil Sampling System)
The Dynamic Oil Sampling (DOS) system uses controlled heating and passive
cooling to stimulate oil movement in front of the sensor to ensure a representative
sample is supplied to the sensor at all times.
Heating is achieved using heating resistors mounted on the internal side of the
heater plate. The heating power is controlled by a time-proportioning algorithm.
This algorithm modulates the temperature around the desired set point. For more
information, see Section 3.2.4.
Note: Detection of an open thermistor shuts the heating power off.
Note: The dynamic oil sampling system temperature is limited to 50°C (122°F). A
thermal fuse with an 80°C (176°F) rating is located on the base plate and a FUI located
on the power supply board to provide protection against any fault from the control
circuitry
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3 User Interface and Software
The Hydran M2-X’s user interface (see below) is located on the front of the
electronic card cage. To access it, remove the cover.
Figure 3-1: User Interface
The user interface allows the use of the Hydran M2-X as a stand-alone unit. It
consists of a 128 x 64 pixels, backlit liquid crystal display (LCD) and an eight-key
membrane keypad.
• The display requires no manual contrast adjustment and is equipped with
temperature compensation. The backlight display allows easy reading of the
display at night. When the Hydran M2-X is closed, the display remains visible
through a window in the cover. The figure below shows a typical screen.
Figure 3-2: Typical Display
• There are eight keys (for more information, see Section 3.1.1):
– Three context keys.
– Esc
– Four arrow keys: Up, Down, Left and Right
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Both the display and keypad are designed to function under an extremely wide
temperature range.
Note: It is recommended to use the Perception software rather than the Hydran
M2-X’s user interface (keypad and display; see Figure 3-1); Only the analog I/O
calibration and communication parameters cannot be accessed with the Perception
software. All other parameters and commands can be accessed both with the Hydran
M2-X’s user interface and the Perception software.
3.1.1 Using the Keypad Keys
3.1.1.1 Three Context Keys
The purpose of each of these keys can change according to the screen content.
Their purpose is displayed on the bottom line of the display, directly above the keys
(for an example, see Figure 3-2). A key that is not used will have no bottom line text.
A specific function is always assigned to the same context key. The Table below
shows examples of common context keys in the Main Display mode (see
Section 3.1.2.3).
Key Name
Key Location
Function
Main Menu
Middle
Return to the top level of the Main Menu
Enter
Right
Enter a submenu
Change
Right
Change the value of a parameter
Ackn.
Right
Acknowledge an alarm
Cancel
Left
Return to the previous value
Accept
Right
Validate the new value
Table 3-1: Examples of Common Context Keys
3.1.1.2 Four Arrow Keys
These keys are used as follows:
• They are used to navigate through options in a menu, parameters in a list or
digits of a parameter value. When an item is selected, it is displayed in white
on a black background. Use the arrow keys to select other items on the
screen: the Up arrow goes up, the Down arrow goes down, etc.
• When changing the value of a parameter, the Up arrow increments the value
of the selected digit and the Down arrow decrements it. Press and hold these
keys for more than one second to accelerate the rate of increase or decrease.
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• Any of the four arrow keys can be used to display the next screen of the Main
Display mode (see Section 3.1.2.3).
3.1.1.3 Esc
The Esc key is used as follows:
• In the Menu Navigation mode (see Section 3.1.2.2), it is used to return to the
preceding level in the menu hierarchy.
• When changing a value, it cancels the current modification and returns to the
preceding level.
• It can be used to switch from the Main Display mode to the Main Menu, and
vice versa.
3.1.2 Operating Modes
The Hydran M2-X’s user interface has three operating modes:
• First priority: Unacknowledged Alarms mode (see Section 3.1.2.1). In this
mode, the Hydran M2-X displays messages of unacknowledged alarms.
• Second priority: Menu Navigation mode (see Section 3.1.2.2). In this mode,
the user accesses the Hydran M2-X’s Main Menu’s options, parameters and
commands.
• Third priority: Main Display mode (see Section 3.1.2.3). In this mode, the
Hydran M2-X displays up to four screens of messages:
– Gas readings and trends.
– Moisture readings and averages.
– Readings of the optional analog inputs (present only if one or more analog
inputs are installed).
– List of active alarms.
Note: The Hydran M2-X automatically returns to the Main Display mode if the keypad
is not used for five minutes.
3.1.2.1 Unacknowledged Alarms Mode
Note: Alarms are explained in detail in Chapter 7. Alarm messages due to system fault
conditions are listed in Section 8.1. Appendix I presents the list of all alarm messages
that can be displayed by the Hydran M2-X and that can appear on the Perception
software.
In this mode, the display shows the list of detected alarm conditions that have
not yet been acknowledged; each displayed screen corresponds to one alarm
condition. If two or more unacknowledged alarm conditions are present, the Hydran
M2-X rotates through the screens; each one is displayed for five seconds. A screen
example is shown in Figure 3-3.
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Figure 3-3: Example of Unacknowledged Alarm
Each screen contains:
• The name of the parameter responsible for the alarm.
• The value of this parameter.
• The date and time at which the alarm condition was detected.
The unacknowledged alarm screens are always displayed in priority. When an
alarm condition occurs, the Main Display mode is immediately replaced by the
Unacknowledged Alarms mode.
An alarm is acknowledged by pressing the Ackn. context key while the
corresponding message is displayed. When acknowledged, the message is removed.
The Hydran M2-X returns to the Main Display mode when all alarms have been
acknowledged.
Acknowledged alarms that are still active are shown in a screen of the Main
Display mode (see Section 3.1.2.3). When an alarm condition disappears, the
corresponding message is removed from the Main Display mode screen.
3.1.2.2 Menu Navigation Mode
In the Menu Navigation mode, the keypad is used to access the Main Menu’s
options, parameters and commands. The Main Menu gives access to all Hydran M2X’s parameters and commands To access the Main Menu (from the Main Display
mode), press the Main Menu context key.
Each option of the Main Menu is described in detail in Section 3.3 to Section 3.6.
Note: The Hydran M2-X automatically returns to the Main Display mode if the keypad
is not used for five minutes.
3.1.2.3 Main Display Mode
This mode is displayed automatically if there are no unacknowledged alarms and
the keypad is unused for more than five minutes. To select this mode manually from
the Main Menu, press the Esc key until screen 1 (described below) of the Main Display
mode is reached.
In the Main Display mode, the Hydran M2-X displays four screens of messages:
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• Screen 1 (below) displays gas-related information (for more information, see
Section 3.2.8.1):
• Gas Level: The gas level in ppm.
• Gas Hourly Tr.: The gas hourly trend in ppm/x hours.
• Gas Daily Tr.: The gas daily trend in ppm/x days.
Figure 3-4: Screen 1 of Main Display Mode - Gas Readings Screen
• Screen 2 (below) displays moisture-related information (for more information,
see Section 3.2.8.2):
• %RH Level: The relative humidity in percentage.
• Average: The relative humidity average in percentage.
• PPM H2O Level: The moisture level in ppm.
• Average: The average moisture level in ppm.
• Sensor Temp: The temperature of the sensor in °C.
Figure 3-5: Screen 2 of Main Display Mode - Moisture Readings Screen
• Screen 3 (see following page) displays the readings performed through the
optional analog input(s) (if present).
Note: The I/O names and units values are set in Setup > I/O Setup > An. Input
Setup > IO#x(In.4-20mA) > Configuration > Identification.
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Figure 3-6: Screen 3 of Main Display Mode - Analog Input Readings Screen
Note: The readings of screens 1, 2 and 3 can also be accessed in View Readings >
Current Readings (see Section 3.4.1).
• Screen 4 (see below) displays the list of active alarms. Alarm conditions are
listed in this screen only if an alarm occurred, if it was acknowledged and if
the alarm condition is still present.
Figure 3-7: Screen4 of Main Display Mode - Active Alarms Screen
3.1.3 Changing the Value of a Parameter
Proceed as follows to change the value of a parameter:
1. Navigate to the desired parameter and press the Change context key. There
are two possibilities:
• For numeric parameters, a screen similar to the one shown in Figure 3-8 is
displayed. This screen indicates the following information:
– Current Value: Current value of this parameter.
– Min Value: Lowest value at which this parameter can be set.
– Max Value: Highest value at which this parameter can be set.
– New Value: To set a new value for this parameter.
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Figure 3-8: Typical Screen for Changing Numeric Parameters
• For alphanumeric parameters, a screen similar to the one shown in Figure 3-9
is displayed. This screen indicates the following information:
• Current Value: Current expression of this parameter.
• New Value: To set a new expression for this parameter.
Figure 3-9: Typical Screen for Changing Alphanumeric Parameters
2. Use the Right or Left arrow key to position the cursor on the digit or character
to be changed.
3. To change New Value, there are three possibilities:
• For numeric parameters, use the Up or Down arrow key to increment or
decrement this digit.
• For alphanumeric parameters, use the Up or Down arrow key to scroll in
ascending or descending order through the list of available characters.
See Table 3-1.
• Press the Delete context key to eliminate this digit from the value.
Note: Press and hold the Up or Down arrow keys for more than one second to
accelerate the rate of increase or decrease.
4. Repeat the last step for each digit or character you wish to change. To add
digits or characters, press the Right key past the last digit or character.
5. Press the Accept context key to validate the new value; you can also press
the Cancel context key or the Esc key to quit the screen and return to the
previous value.
6. If the new value is validated using the Accept context key, the message Value
Changed appears, as shown in Figure 3-10.
Note: Each parameter has a default value. The Hydran M2-X resets each
parameter to its default value when the battery is replaced (see Appendix G) or
when the Hydran M2-X’s embedded software is upgraded (see Appendix F).
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1. 0 to 9
10. [ 19. } 28. ’ 2. :
11. \ 20. ~ 29.
(
3. ;
12. ] 21.
(empty space)
30. ) 4. <
13. ^ 22. ! 31. * 5. = 14. _ 23. " 32. + 6. > 15. ` 24. # 33.
,
7. ?
16.
a to z
25. $ 34. - 8. @
17. { 26. % 35. . 9. A to Z
18. | 27. & 36.
/
Table 3-2: List of Available Characters for Alphanumeric Parameters
Figure 3-10: Message Value Changed
When an adjustable parameter is highlighted, the word Change is displayed
above the context key on the right. If the word Change is not displayed, this item
cannot be changed.
3.1.4 Scrolling Indicators
The Hydran M2-X’s display can show up to seven lines of text at a time; if a screen
contains more lines, scrolling indicators are displayed in the bottom right corner:
• : Indicates there is at least one item below the displayed items. Press the
Down arrow until these items are displayed.
• : Indicates there is at least one item above and below the displayed items.
Press the Up or Down arrow until these items are displayed.
• : Indicates there is at least one item above the displayed items. Press the
Up arrow until these items are displayed.
3.1.5 Passwords
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The Hydran M2-X’s user interface is protected by two passwords. A password is
required to modify parameters:
• Password No. 1 (first level): The password No. 1 is 1253. It gives access to
most variable adjustment functions.
• Password No. 2 (second level): The password No. 2 is 1231. It gives access to
the following items:
• Setup > Calibration (to calibrate the Hydran M2-X’s I/O’s and sensor
board).
• Service > Install New Sensor (to enter the sensor parameters).
• History Setup > Clear HM2-X History File (to erase the history files).
Password protection prevents accidental or unauthorized change of the Hydran
M2-X’s parameters. The passwords should be disclosed to authorized personnel
only, particularly password No. 2. The passwords are common to all Hydran M2-X’s
and cannot be changed.
When the Hydran M2-X requests a password, one of the two following messages
is displayed:
• Password 1?
:1247
• Password 2?
:1247
Use the Up or Down keys to increment or decrement the displayed value, and
press the Enter context key to accept the value. The user is now authorized to
change the protected parameters until he quits the Menu Navigation mode. No
password will be requested again unless a higher-level password is required.
Note: All modifications are recorded in the Events history file. See Section 3.4.2.3.
3.2 Setup Menu
3.2.1 Alarms Setup
These functions are identical to the ones in Alarms > Alarms Setup. See Section
3.3.2.
3.2.2 Date & Time
The Date & Time function is used to change the date and time of the Hydran M2-
X.
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The internal clock (see Section 2.3.4.2) provides the date and time unless the
battery (see Section 2.3.4.1) is disconnected.
3.2.3 Relay Setup
3.2.3.1 Relay Test
The Relay Test parameters are used to set the operation mode of each of the five
relays. The four operation modes are explained in Section 6.5.3.
3.2.3.2 Relay#1 Setup to Relay#4 Setup
These four options display all alarm conditions assigned to a relay. They are used
to assign new alarms, or to remove some, to each of the four alarm relays.
Individual alarm conditions can also be assigned to a relay through parameters
Alarm L-L Relay, Alarm Low Relay, Alarm Hi Relay and Alarm Hi-Hi Relay from
Alarms > Alarms Setup (see Section 3.3.2).
3.2.4 Temp Setup
The Temp. Setup parameters pertain to the operation of the Hydran M2-X’s
heater plate and dynamic oil sampling system.
• Temp Set Point: Set point of the sensor temperature (average target
temperature of the heater plate). The default value is 35 °C.
• Temp SP Modulation: Temperature variation around the Temp Set Point. For
example: if Temp Set Point is set to the recommended temperature of 35 °C
(95 °F) and Temp SP Modulation to 10 °C (18 °F), the temperature varies
between 30 and 40 °C (86 and 104 °F).
• Temp Mod. Period: Modulation period of the temperature variation. If Temp
Mod. Period is set to 120 minutes (default value) in the above example; it
takes 120 minutes for the heater plate temperature to go from 35 to 40 to 35
to 30 to 35 °C (from 95 to 104 to 95 to 86 to 95 °F).
For more information on the dynamic oil sampling system, see Section 2.5.
3.2.5 Calibration
The Calibration function is used to calibrate the following analog inputs:
• The gas sensor signal.
• The moisture sensor signal.
• The thermistor in the sensor.
• The thermistors in the heater plate.
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This function is used only for service purposes. Misuse of this
function will render the Hydran M2-X inoperative.
3.2.6 History Setup
The History Setup function is used to:
• Set the logging rate parameters of the Short Term and Long Term history files.
• Clear the contents of the history files.
3.2.6.1 History Log Rate
• Short Term Rate: Acquisition rate for Short Term recordings. This value can
be set from 1 to 360 minute(s), thus spanning a period of 8 hours to 4 months.
To change the value, click the arrows of the thumb wheel or type the value
directly in the field. The total capacity is 4,760 records; for example:
• A logging rate of 1 minute provides a capacity of 79 hours.
• A logging rate of 5 minutes provides a capacity of 16 days.
• A logging rate of 15 minutes (default value) provides a capacity of 50 days.
• A logging rate of 60 minutes provides a capacity of 198 days.
• A logging rate of 360 minutes (6 hours) provides a capacity of 1,190 days
(40 months).
• Long Term #1, #2, #3 and #4: One to four Long Term recordings can be set
during one day. To disable a parameter, set it to 00:00. Long Term #1 cannot
be turned off; Long Term #2, #3 and #4 however can each be turned off. The
logging times must be set in chronological order, Long Term #1 being the first
of the day, Long Term #2 being the second, etc. The total capacity is 4,760
records; for example:
• 1 recording per day provides a capacity of 4,760 days (13 years).
• 2 recordings per day provides a capacity of 2,380 days (6.5 years).
• 3 recordings per day provides a capacity of 1,587 days (4 years and
4 months).
• 4 recordings per day provides a capacity of 1,190 days (3 years and
3 months).
Note: Once changed, the new value takes effect after the completion of the
current period.
3.2.6.2 Clear HM2-X History File
The contents of the Short Term, Long Term and Events history files can be
individually cleared. Proceed as follows:
1. Select the desired option:
CAUTION
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• Clear Short Term Hist: To delete the content of the Short Term history file.
• Clear Long Term Hist: To delete the content of the Long Term history file.
• Clear Event Hist: To delete the content of the Events history file.
2. Press Ok. The message History Cleared is then displayed.
Clearing a history file deletes its data from the Hydran M2-X.
This data cannot be recovered. To keep the data, download it
using the Perception software before clearing the file.
3.2.6.3 Clear Sensor Hist File
Clr S.Card#1 Hist: To delete the content of the Sensor history file.
Note: Use this function only if the sensor card is replaced.
3.2.7 Comm Setup
Note: The Hydran M2-X’s communication parameters can only be modified using the
Hydran M2-X’s keypad and display. They cannot be changed using the Perception
software.
The Comm Setup function is used to:
• Set the network and Hydran M2-X’s identification number.
• Set the communication baud rate and other communication parameters.
3.2.7.1 Identification
• Power Station ID: Power station’s identification number, ranging from 1 to 9999.
All Hydran M2-X’s belonging to a local network must share the same power
station identification number. This number is used when accessing a station
remotely or when analyzing and displaying history file data in the Perception
software. Each local network must have a different power station identification
number.
• Monitor ID: Hydran M2-X’s identification number, ranging from 1 to 254. An
exclusive identification number must be assigned to each Hydran M2-X in a local
network. If two Hydran M2-X’s share the same number in a local network, they
will not be able to communicate properly with the Perception software. The
numbers can be assigned sequentially or using any other assignment method
preferred by the user; it can be useful to assign numbers that correspond to the
CAUTION
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identification numbers of the transformers being monitored. For an example, the
Table below.
Transformer
Hydran M2-X Monitor ID Parameter
Reserved
1
a
T1AS
11
T1B
12
T1C
13
T2A
21
T2B
22
T2C
23
a. At least one Hydran M2-X in a local network must be set to an
identification number between 1 and 5 (inclusively).
Table 3-3: Setting Example for Identification Numbers
Both identification numbers must be identical to those assigned to the same
Hydran M2-X’s and power station in the Perception software.
Note: The identification numbers of each Hydran M2-X must be kept on record for
reference.
The identification number of at least one Hydran M2-X in a
local network must be set between1 and 5 (inclusively).
CAUTION
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3.2.7.2 Baud Rate and Other Parameters
• RS-232 Baud Rate: Baud rate of the RS-232 serial communication link (DB-9
connector). The available rates are: 1,200, 2,400, 4,800, 9,600, 19,200, 38,400,
57,600 or 115,200 bps (bits per second). The Perception software must be set to
the same baud rate value.
Note: All Hydran M2-X’s in a local network must be set to the same data
communication speed. The recommended speed is 9,600 bps.
• RS-485 Baud Rate: Baud rate of the RS-485 serial communication link. The
available rates are: 1,200, 2,400, 4,800, 9,600, 19,200, 38,400, 57,600 or 115,200
bps (bits per second); the default rate is 19,200 bps. All Hydran M2-X’s belonging
to one network must be set to the same baud rate.
• RS232<->RS485 Bridge: To enable or disable communications with the local
network. Press Change to switch from Enabled to Disabled:
– If Enabled (default value), the laptop computer connected to the DB-9
connector of a Hydran M2-X can communicate with all Hydran M2-X’s in
the RS-485 local network.
– If Disabled, the laptop computer can only communicate with the Hydran
M2-X to which it is connected.
• Modem Dial String: When an alarm condition is detected and the Call on Alarm
mode is selected, the Hydran M2-X will send the Modem Dial String to the
modem. The default string sent is: ATDS0. For information on how to change an
alphanumeric parameter, see Section 3.1.3. This string could be changed, if
needed, in function of the modem used.
3.2.8 Readings Setup
3.2.8.1 Gas Reading Setup
• Daily Tr. Period: Period of the daily trend (number of days used to calculate the
gas daily trend). Increasing the period decreases the normal fluctuations of the
readings, but increases the response time.
• Hourly Tr. Period: Period of the hourly trend (number of hours used to calculate
the gas hourly trend). Increasing the period decreases the normal fluctuations of
the readings, but increases the response time.
• Hydran PPM Period B: Part of the dynamic oil sampling system.
For information on the hourly and daily trends, see Section 6.2.5.
3.2.8.2 H
2
0 Reading Setup
• %RH Average: Time (in hours) used to calculate the %RH Hourly Avg. value.
• PPM H
2
O Avg.: Time (in hours) used to calculate the PPM H2O Hr. Avg. value.
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These values are accessible in two menus:
• In View Readings > Current Readings > H
2
O Readings.
• In the moisture readings screens of the Main Display mode (see Section 3.1.2.3).
In these screens, both values are named Average.
3.2.8.3 Sensor Temp Avg Per
Time (in hours) used to calculate the View Readings > Current Readings > Temp.
Readings > Sensor Temperature Avg. value.
3.2.9 I/O Setup
The I/O Setup function is used to configure the optional I/O interfaces. For more
information, see item 3 on page 28.
3.2.9.1 Analogue Input Setup
The An. Input Setup function is used to set up the optional analog inputs module.
• Input1, Input2, ...: To select the desired I/O.
• IO State: Actual input signal expressed as a percentage of full scale.
• Analog Input: Actual reading name. The name for this value is set in Setup >
I/O Setup >An. Input Setup > IO#x(In.4-20mA) > Configuration > Identification
> Input Name.
• Sample Rate: To set the frequency at which the signal is sampled. The readings
are updated immediately after each sample.
• An. Input Calibration: To calibrate the analog input signal.
• Configuration:
– Identification:
– Input Name: This name is used to indicate the actual reading (see above).
– Input Short Name: This name is used as the first part of an option name
in Alarms > Alarms Setup, in Setup > Alarms Setup and in Setup > I/O
Setup > An. Input Setup > IO#x(In.4-20mA) > Alarm Setup. It is always
followed by Alarm Setup. For example, if Input Short Name is set to
I/O#1, the option name would be I/O#1 Alarm Setup.
– Input Units: This name is used to the right of the actual reading. For
example, this parameter can be set to “C” to indicate °C.
– Reading Setup:
– Reading Precision: Number of decimals to be displayed. This value is
used when displaying the actual reading for this analog input.
– Input Min.: Minimum possible value for the range of this analog input.
This value corresponds to a current of 4 mA. Refer to the sensor
specifications.
– Input Max.: Maximum possible value for the range of this analog input.
This value corresponds to a current of 20 mA. Refer to the sensor
specifications.
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Note: For example, the reading range of a Magnetic-Mount Temperature
Transmitter (part number 13298) is -40 to 150 ºC. For this sensor, the Input
Min. parameter would be set to -40 ºC and Input Max. to 150 ºC.
– Input Resolution: Degree to which the result of the reading approximates
the true reading. Set this parameter only if discrete values need to be
displayed (for example, in the case of a tap changer position); otherwise, it
is set to 0.
– Alarm Setup: These parameters are identical to the ones in Alarms > Alarms
Setup > Analog Input Alarm Setup. See Section 3.3.2.5.
3.2.9.2 Analogue Output Setup
The An. Output Setup function is used to set up the optional analog output
signal.
• Analog State: Displays the state of the Hydran M2-X’s analog output as a
percentage of the maximum electric current. The analog output provides the
gas level being measured; the displayed percentage is thus directly proportional
to the gas level. For details on the analog output, see Section 2.3.2 and Section
K-1.
• Analog Mode: To set the operation mode of the analog output. The three
Force x % modes are used only to test the operation of the Hydran M2-X.
Table 3-4 shows the electrical current generated for each mode.
Type of Output
Operation Mode
Force 0 %
Force 50 %
Force 100 %
4–20 mA
4.00 ± 0.10 mA
12.00 ± 0.20 mA
20.00 ± 0.40 mA
Table 3-4: Electrical Current Generated by the Analog Output for Each Operation Mode
3.2.9.3 TDM Output Setup
The TDM Output Setup function is used to set up the TDM output signal. The TDM
signal is monitored by a Hydran 201Ci-1 or Hydran 201Ci-4 Controller.
• IO State: Displays the state of the TDM signal in percentage. The displayed
percentage by IO State is thus directly proportional to the gas level (% output =
ppm/20; 2,000 ppm = 100 %).
• IO Mode: Used to set the operation mode of the TDM signal. The three Force x %
modes are used only to test the operation of the TDM signal.
• Comm #2 TDM Relay A: Used to select a first relay. The state of this relay will be
transmitted in the TDM signal.
• Comm #2 TDM Relay B: Used to select a second relay. The state of this relay will
be transmitted in the TDM signal.
• Sample Rate: To set the frequency at which the signal is updated.
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• Configuration:
– Reading To Output: Indicates the value to transmit with the TDM signal.
There are four choices: %RH Level, PPM H2O Level, Gas Level and None. If
the TDM signal is connected to a Hydran 201Ci controller, you must select
Gas Level.
– Input Min.: Indicates the minimum of the value to transmit.
– Input Max.: Indicates the maximum of the value to transmit.
3.3 Alarms Menu
3.3.1 Current Alarms
The Current Alarms function displays the list of active alarm conditions. An alarm
condition is listed only if it is not acknowledged or if the alarm condition is present.
Press any arrow key to rotate through the list of current alarms. Each displayed
screen corresponds to one alarm condition. If two or more alarm conditions are
present, the Hydran M2-X scrolls through the screens, each one being displayed for
five seconds. A screen example is shown below.
Figure 3-11: Example of Current Alarms
Each screen contains the following information:
• The name of the parameter responsible for the alarm.
• Alarm Status: The status of this alarm, which can be Not ack., On or Off.
• Alarm SP: The set point of this alarm.
• Current Val.: The value currently measured.
• On at: .The date and time at which the alarm condition was detected.
3.3.2 Alarms Setup
The Alarms Setup functions are used to set the alarm parameters.
The operation of the relays and alarms is described in Chapter 6. In summary, an
alarm is triggered if the alarm condition (value of parameter Alarm Hi SP or Alarm
Hi-Hi SP) is exceeded for a period of time greater than the corresponding delay
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(parameter Alarm Delay); when an alarm condition is detected, the relay assigned to
this alarm condition (parameters Alarm Hi Relay and Alarm Hi-Hi Relay) is activated.
The parameters in Alarms Setup are also located in Setup > Alarms Setup.
3.3.2.1 Hydran Alarms Setup
• The Hydran Alarm Setup functions give access to the parameters of the gas
alarm conditions:
– Alarm Hi SP: Set point of the gas level High alarm condition.
– Alarm Hi-Hi SP: Set point of the gas level High-High alarm condition.
– Alarm Delay: Alarm delay for both set points.
– Alarm Hi Relay: Relay activated when a gas level High alarm condition is
detected.
– Alarm Hi-Hi Relay: Relay activated when a gas level High-High alarm
condition is detected.
• Hydran Hourly Trend Alarm: Gives access to the hourly trend High and High-
High alarm parameters:
– Alarm Hi SP: Set point of the hourly trend High alarm condition.
– Alarm Hi-Hi SP: Set point of the hourly trend High-High alarm condition.
– Alarm Delay: Alarm delay for both set points. This delay is calculated in
percentage of the hourly trend period; see parameter Hourly Tr. Period in
Setup > Reading Setup > Gas Reading Setup in Section 3.2.8.1.
– Alarm Hi Relay: Relay activated when a gas hourly trend High alarm
condition is detected.
– Alarm Hi-Hi Relay: Relay activated when a gas hourly trend High-High alarm
condition is detected.
• Hydran Daily Trend Alarm: Gives access to the daily trend High and High-High
alarm parameters:
– Alarm Hi SP: Set point of the daily trend High alarm condition.
– Alarm Hi-Hi SP: Set point of the daily trend High-High alarm condition.
– Alarm Delay: Alarm delay for both set points. This delay is calculated in
percentage of the daily trend period; see parameter Daily Tr. Period in Setup
> Reading Setup > Gas Reading Setup in Section 3.2.8.1.
– Alarm Hi Relay: Relay activated when a gas daily trend High alarm condition
is detected.
– Alarm Hi-Hi Relay: Relay activated when a gas daily trend High-High alarm
condition is detected.
• Hydran Sensor Temp Alarm: See Alarms Setup > Temp. Alarm Setup > Sensor
Temp. Alarm in Section 3.3.2.3.
Note: Each alarm of the Hydran M2-X can be assigned to any one of the four relays (1
to 4). More than one alarm can be assigned to a same relay. Appendix I presents the
list of all alarm messages that can appear in the Perception software.
3.3.2.2 Moisture Alarms Setup
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The Moisture Alarm Setup functions give access to the parameters of the
moisture alarm conditions:
• %RH Level Alarm: Gives access to the %RH moisture level High and High-High
alarm parameters:
– Alarm Hi SP: Set point of the relative humidity High alarm condition.
– Alarm Hi-Hi SP: Set point of the relative humidity High-High alarm condition.
– Alarm Delay: Alarm delay for both set points.
– Alarm Hi Relay: Relay activated when a relative humidity High alarm
condition is detected.
– Alarm Hi-Hi Relay: Relay activated when a relative humidity High-High alarm
condition is detected.
• H2O PPM Level Alarm: Gives access to the ppm moisture level High and High-
High alarm parameters:
– Alarm Hi SP: Set point of the ppm moisture level High alarm condition in ppm.
– Alarm Hi-Hi SP: Set point of the ppm moisture level High-High alarm
condition in ppm.
– Alarm Delay: Alarm delay for both set points.
– Alarm Hi Relay: Relay activated when a moisture level High alarm condition
is detected.
– Alarm Hi-Hi Relay: Relay activated when a moisture level High-High alarm
condition is detected.
• %RH Hourly Average Alarm: Gives access to the relative humidity average High
and High-High alarm parameters:
– Alarm Hi SP: Set point of the relative humidity average High alarm condition.
– Alarm Hi-Hi SP: Set point of the relative humidity average High-High alarm
condition.
– Alarm Delay: Alarm delay for both set points. T his delay is calculated using
parameter %RH Average in Setup > Reading Setup > H2O Reading Setup;
see Section 3.2.8.2.
– Alarm Hi Relay: Relay activated when a relative humidity average High alarm
condition is detected.
– Alarm Hi-Hi Relay: Relay activated when a relative humidity average High-
High alarm condition is detected.
• H2O PPM Hourly Average Alarm: Gives access to the average ppm moisture
level High and High-High alarm parameters:
– Alarm Hi SP: Set point of average ppm moisture level High alarm condition in
ppm.
– Alarm Hi-Hi SP: Set point of average ppm moisture level High-High alarm
condition in ppm.
– Alarm Delay: Alarm delay for both set points. This delay is calculated using
parameter PPM H2O Avg. in Setup > Reading Setup > H2O Reading Setup;
see Section 3.2.8.2.
– Alarm Hi Relay: Relay activated when an average moisture level High alarm
condition is detected.
– Alarm Hi-Hi Relay: Relay activated when an average moisture level High-
High alarm condition is detected.
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Note: Appendix I presents the list of all alarm messages that can appear in the
Perception software.
3.3.2.3 Temperature Alarms Setup
• Hydran Sensor Temp Alarm: Gives access to the sensor temperature Low-Low,
Low, High and High-High alarm parameters:
– Alarm Low-Low SP: Set point of the sensor temperature Low-Low alarm
condition.
– Alarm Low SP: Set point of the sensor temperature Low alarm condition.
– Alarm Hi SP: Set point of the sensor temperature High alarm condition.
– Alarm Hi-Hi SP: Set point of the sensor temperature High-High alarm
condition.
– Alarm Delay: Alarm delay, in minutes, for all above set points.
– Alr C. Open Relay: Relay activated when a sensor temperature Low-Low
alarm condition is detected.
– Alarm Low Relay: Relay activated when a sensor temperature Low alarm
condition is detected.
– Alarm Hi Relay: Relay activated when a sensor temperature High alarm
condition is detected.
– Alr C. Short Relay: Relay activated when a sensor temperature High-High
alarm condition is detected.
• Base Plate Temp Alarm: Gives access to the base plate temperature Low-Low,
Low, High and High-High alarm parameters:
– Alarm Low-Low SP: Set point of the base plate temperature Low-Low alarm
condition.
– Alarm Low SP: Set point of the base plate temperature Low alarm condition.
– Alarm Hi SP: Set point of the base plate temperature High alarm condition.
– Alarm Hi-Hi SP: Set point of the base plate temperature High-High alarm
condition.
– Alarm Delay: Alarm delay, in minutes, for all above set points.
– Alr C. Open Relay: Relay activated when a base plate temperature Low-Low
alarm condition is detected.
– Alarm Low Relay: Relay activated when a base plate temperature Low alarm
condition is detected.
– Alarm Hi Relay: Relay activated when a base plate temperature High alarm
condition is detected.
– Alr C. Short Relay: Relay activated when a base plate temperature High-High
alarm condition is detected.
Note: Appendix I presents the list of all alarm messages that can appear in the
Perception software.
3.3.2.4 Battery Alarm Setup
The Battery Alarm Setup functions give access to the battery’s alarm
parameters:
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• Alarm Low-Low SP: Set point of the battery voltage Low-Low alarm condition.
• Alarm Low SP: Set point of the battery voltage Low alarm condition.
• Alarm Delay: Alarm delay for both set points.
• Alarm L-L Relay: Relay activated when a battery Low-Low alarm condition is
detected.
• Alarm Low Relay: Relay activated when a battery Low alarm condition is
detected.
Note: Do not adjust without consulting the General Electric Customer Service (the
coordinates can be found at the bottom of page 9).
A battery alarm is triggered if the voltage of the battery is below the Low or Low-
Low set point for a period of time longer than the delay. For details, see
Section 6.3.2.3.
Note: Appendix I presents the list of all alarm messages that can appear in the
Perception software.
For explanations pertaining to the Hydran M2-X’s battery, see Section 2.3.4.1; for
the battery specifications, see Section 9.3.1; to replace the battery, see Appendix G.
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3.3.2.5 Analog Input Alarm Setup
The first part of this function name (Analog Input) is set in Setup > I/O Setup > An.
Input Setup > IO#x(In.4-20mA) > Configuration > Identification >Input Short Name.
There is one Analog Input Alarm Setup function for each input interface installed
on the Hydran M2-X.
The Analog Input Alarm Setup function gives access to the alarm parameters for
each optional input interface:
• Alarm Low-Low SP: Set point of the Low-Low alarm condition.
• Alarm Low SP: Set point of the Low alarm condition.
• Alarm Hi SP: Set point of the High alarm condition.
• Alarm Hi-Hi SP: Set point of the High-High alarm condition.
• Alarm Delay: Alarm delay for all set points.
• Alarm L-L Relay: Relay activated when a Low-Low alarm condition is
detected.
• Alarm Low Relay: Relay activated when a Low alarm condition is detected.
• Alarm Hi Relay: Relay activated when a High alarm condition is detected.
• Alarm Hi-Hi Relay: Relay activated when a High-High alarm condition is
detected.
3.3.2.6 System Fault Trigger
The Sys. Fault Trigger parameters are used to disable (Off) or enable (On) each
system fault condition. Press the Change context key to enable or disable a
condition. The disabled (Off) system faults:
• Do not trigger the Unacknowledged Alarms mode (see Section 3.1.2.1).
• Are not listed in Alarms > Current Alarms.
3.3.3 Alarm History
The data displayed in Alarm History is identical to the one in View Readings >
View History Data > Alarm History. See Section 3.4.2.5.
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3.4 View Readings Menu
3.4.1 Actual Readings
3.4.1.1 Temperature Readings
• Sensor Temp: Actual temperature of the sensor, in °C.
• Sensor Temp Avg: Average temperature of the sensor, in °C. The period used to
calculate this value is set with parameter Sens. Temp Avg Per. in Setup
>Readings Setup (see Section 3.2.8.3).
• Heater Plate Temp: Actual temperature of the heater plate, in °C.
• Heater Power: Actual heating power of the heater plate, in percentage of the
maximum power.
• Temp SP Current: Actual temperature control set point (part of the dynamic oil
sampling system).
3.4.1.2 Gas Readings
The gas readings displayed are the same as the ones shown in the Main Display
mode.
• Gas Level: Actual reading of gas level, in ppm.
• Gas Hourly Tr.: Actual gas hourly trend, in ppm/x hours. Parameter Hourly Tr.
Period. (in Setup > Readings Setup > Gas Reading Setup) specifies the period
used to calculate this trend (see Section 3.2.8.1).
• Gas Daily Tr.: Actual gas daily trend, in ppm/x days. Parameter Daily Tr. Period
(in Setup > Readings Setup > Gas Reading Setup) specifies the period used to
calculate this trend (see Section 3.2.8.1).
• Sensor Temp: Actual temperature of the sensor, in °C.
• Gas ServiceU: Value of ServiceU variable.
• Gas ServiceV: Value of ServiceV variable.
3.4.1.3 Moisture Readings
• %RH Level: Actual level of relative humidity.
• PPM H
2
O Level: Actual reading of moisture, in ppm.
• Sensor Temp: Actual temperature of the sensor, in °C.
• %RH Hourly Avg.: Relative humidity average. Parameter %RH Average (in Setup
> Reading Setup > H2O Reading Setup) specifies the period used to calculate this
average; see Section 3.2.8.2.
• PPM H
2
O Hr. Avg.: Average ppm moisture level. Parameter PPM H2O Avg. (in
Setup > Reading Setup > H2O Reading Setup) specifies the period used to
calculate this average (same as %RH); see 3.2.8.2.
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• Sensor Temp Avg.: Average temperature of the sensor, in °C. The period used to
calculate this value is set with parameter Sens. Temp Avg Per. in Setup >
Readings Setup (see Section 3.2.8.3).
• H
2
O Cell mV: Voltage of the electrical signal currently sent by the moisture
sensor.
3.4.2 View History Data
The Hydran M2-X has an internal function that automatically records information
such as gas and moisture levels, trend values, alarm messages and setup
parameters. This information is stored in four sections, which are collectively referred
to as history files.
The View History Data functions are used to consult the four history files:
• Short Term (recording at a fixed logging rate; example: every 15 minutes)
• Long Term (recording at fixed logging rates; example: each day at midnight)
• Events (recording at the time of events; example: alarms)
• Service (recording at the time of the semimonthly, automatic sensor test)
The maintenance procedure in Section 9 shows how the data of the history files
can be used.
3.4.2.1 Short Term History
The Short Term History function gives access to the Short Term history file. From
1 to 360 minutes (adjustable; see parameter Short Term Rate in Setup > History
Setup > History Log Rate [see Section 3.2.6.1]), the date and time plus several values
are logged in this file. Its capacity is 4,760 records (if equipped with four analog input
inter-faces); when the file is full, a new record erases the oldest one in a first in, first
out method.
The following variables are recorded in the Short Term history file (this list is
identical for the Long Term and Event history files):
• Gas level in ppm.
• Service U.
• Hourly trend in ppm/x hours (default value is 24 hours).
• Daily trend in ppm/x days (default value is 30 days).
• Service V.
• Relative humidity level in %.
• Relative humidity average in %/x hours.
• Moisture level in ppm.
• Moisture average in ppm/x hours.
• H
2
O cell signal in V (microvolts).
• Heater plate temperature in ˚C.
• Heater plate output power in percentage.
• Sensor temperature in ˚C.
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• Sensor temperature average in ˚C.
• Readings or output of optional I/O #1 to #4.
Navigation is performed as follows:
1. From Short Term History, press Enter to read the date and time of the last event
recorded in the Short Term history file.
2. Press the Up or Down arrow keys to read the date and time of previous or next
recordings.
3. Press Enter and the Up or Down keys to read the value of the variables at the
selected date and time.
3.4.2.2 Long Term History
The Long Term History function gives access to the Long Term history file. From
one to four times per day (adjustable; see parameter Long Term Rate in Setup >
History Setup > History Log Rate [see Section 3.2.6.1]), the date and time plus
several values are stored in this file. Its capacity is 4,760 records (if equipped with
four analog input interfaces); when the file is full, a new record erases the oldest one
in a first in, first out method.
Navigation in this file is performed as in the Short Term history file. The values
recorded in the Long Term history file are also identical. See Section 3.4.2.1.
3.4.2.3 Event History
The Event History function gives access to the Events history file. When an event
occurs, the date and time of occurrence, an event message and several values are
stored in this file. Its capacity is 3,120 records (if equipped with four analog input
interfaces); when the file is full and a new recording occurs, the oldest recording is
deleted (first in, first out method). All event messages and their description are
provided in Appendix H.
The following events are recorded:
• An alarm is triggered.
• An alarm is acknowledged by a user.
• An alarm is cancelled (the alarm condition has disappeared).
• A parameter is changed by a user.
• The date and time are set.
• A new sensor is installed.
• The Hydran M2-X is calibrated.
• A power-up or a shutdown occurs.
• The Hydran M2-X is put in service (first power-up).
• The self-test sequence has failed during power-up.
• The microprocessor is reset by the internal watchdog.
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Navigation in this file is performed as in the Short Term history file. The values
recorded in the Events history file are the same as the ones recorded in the Short
Term file. See Section 3.4.2.1.
3.4.2.4 Service History
The Service History function gives access to the Service history file.
The Hydran M2-X performs a self test of its sensor on the first and fifteenth days
of each month at midnight (fixed logging rate, non adjustable). After each test, the
date and time of the test plus several variables are recorded in the Service history
file. Its capacity is 1,470 records (if equipped with four analog input interfaces); when
the file is full and a new recording occurs, the oldest recording is deleted (first in, first
out method). The Service history file may be required for maintenance or trouble
shooting purposes.
Navigation in this file is performed as in the Short Term history file. The values
recorded in the Service history file are the same as the ones recorded in the Short
Term file. See Section 3.4.2.1.
3.4.2.5 Alarm History
Navigation in this file is performed as in the Short Term history file. The values
recorded in the Service history file are the same as the ones recorded in the Short
Term file. See Section 3.4.2.1.
3.4.3 Date & Time
This function is identical to the one in Setup > Date & Time. See Section 3.2.2.
3.5 Test Menu
3.5.1 Sensor Test
The Sensor Test function is an internal diagnostic test that is initiated
automatically for approximately 5 seconds, twice per month (on the 1st and 15th) to
characterise the sensor performance. Upon completion of the test, the internal
sensor test results will automatically update and are stored in the unit’s Service
history files.
If the internal sensor signal is within optimal range, the display on the M2-X will
show Good, indicating that the sensor is operating as expected. No message will be
recorded in the Events history file.
If the internal sensor signal is no longer optimal, the M2-X will trigger a sensor
alarm indicating that there is an issue with the sensor and the corresponding alarm
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message will be displayed on the M2-X display. The Events history file will be
updated with the appropriate message.
Note 1: All alarms are ignored for two minutes following a sensor test.
Note 2: In addition to the automatic sensor test that is initiated semi-monthly at
midnight, the sensor test can also be initiated manually via the local keypad. For each
automatic sensor test, certain parameters are recorded in the Service history file (see
Section 3.4.2.4) for further analysis by General Electric.
3.5.1.1 Sensor Test Results
The alarm messages that can be displayed following a sensor test are shown in
the Table below. For the troubleshooting procedure for each of these alarms, see
Section 8.1.
Message
Significance
Good
Sensor operating as expected.
Replace Sensor Alarm
Sensor Test results outside optimal
operating range. Sensor must be replaced.
Cable Open
Cable disconnected, misconnected or
defective.
Cable Short
Sensor Cable misconnected or short-
circuited.
Sensor Not Installed!
Unable to perform the test. Install Sensor.
Table 3-5: Messages that can be Displayed Following a Sensor Test
Note: The Hydran M2-X is equipped with a provisional alarm called the “Sensor
Caution Alarm”. By default, this alarm is disabled, but can be enabled by the user to
give early notification of a potential impending issue with the sensor. If the “Sensor
Caution Alarm” is subsequently raised, it signifies that the “Replace Sensor Alarm” is
likely to occur soon. Users may wish to verify the DGA reading through comparison
with a manual sample.
3.5.2 Relay Test
The Relay Test parameters are used to set the operation mode of each of the five
relays. The four operation modes are explained in Section 6.5.3.
The same parameters can be accessed in Setup > Relay Setup > Relay Test. See
Section 3.2.3.1.
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3.6 Service Menu
3.6.1 Sensors Parameters
3.6.1.1 Gas Sensor Param
The Gas Sensor Param function gives access to the parameters of the gas
sensor. Each gas sensor has its own set of parameter values; the values are
indicated on the Test Certificate and Data Sheet (for an example, see Figure 3-12)
supplied with the Hydran M2-X. These options do not allow you to modify the
displayed values. To change the values, use Install New Sensor (see Section 3.6.2).
The gas sensor parameters are:
• Gas Serial No.: Serial number of the sensor (engraved under the sensor
connector). The same serial number is used for the gas sensor and humidity
sensor.
• B, M, N, S and A1 to A6: The ten parameters of the gas sensor in a normalized
format (integer numbers).
– The Hydran M2-X computes the gas level in ppm by performing two readings:
the sensor temperature (provided by the thermistor incorporated in the
sensor) and the gas sensor output (gas level). The calculation also requires
these ten parameters (from B to A6).
– These ten parameters characterize the behavior of the gas sensor by
modeling its response according to the temperature.
– The values of these ten parameters are stored in the Hydran M2-X’s
nonvolatile memory (see Section 2.3.4.3).
• Gas Param CkSum: Checksum of the above values. This value is added to the list
to avoid erroneous values from being entered.
Note: The Hydran M2-X uses the proven technology of the Hydran M2-X sensor. For a
complete description, see Section 2.4.
3.6.1.2 H
2
O Sensor Param
The H2O Sensor Param function gives access to the parameters of the moisture
sensor. Each moisture sensor has its own set of parameter values; the values are
indicated on the Test Certificate and Data Sheet (for an example, see Figure 3-12)
supplied with the Hydran M2-X. These options do not allow you to modify the
displayed values. To change the values, use Install New Sensor (see Section 3.6.2).
• H2O SerialNo.: Serial number of the sensor (engraved under the sensor
connector). The same serial number is used for the gas sensor and humidity
sensor.
• H
2
O Param C1 to C10: The ten parameters of the moisture sensor in a
normalized format (integer numbers).
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– The Hydran M2-X computes the moisture level in ppm by performing two
readings: the sensor temperature (provided by the thermistor incorporated in
the sensor) and the moisture sensor output (moisture level). The calculation
also requires these ten parameters (from C1 to C10).
– These ten parameters characterize the behavior of the moisture sensor by
modeling its response according to the temperature.
– The values of these ten parameters are stored in the Hydran M2-X’s
nonvolatile memory (see Section 2.3.4.3).
• H
2
O Param CkSum: Checksum of the above values. This value is added to the list
to avoid erroneous values from being entered.
Note: The Hydran M2-X uses the proven technology of the Hydran M2-X sensor. For a
complete description, see Section 2.4.
Figure 3-12: Test Certificate
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3.6.2 Install New Sensor
3.6.2.1 New Gas Sensor
This function is very similar to Gas Sensor Param (see Section 3.6.1.1), except that
New Gas Sensor allows to change the values of the gas sensor parameters.
Enter the new value of each parameter and press the Change context key. The
sensor is then immediately tested and the result (Good or else) is displayed after a
few seconds. For details, see Section 3.5.1.
Do not change these values unless you are installing a new
sensor.
3.6.2.2 New H
2
O Sensor
This function is very similar to H2O Sensor Param (see Section 3.6.1.2), except that
New H2O Sensor allows to change the values of the moisture sensor parameters.
Enter the new value of each parameter and press the Change context key. The
sensor is then immediately tested and the result (Good or else) is displayed after a
few seconds. For details, see Section 3.5.1.
Do not change these values unless you are installing a new
sensor.
3.6.3 Sensor Test
The H2 Sensor Test function is identical to the one in Test > Sensor Test (see
Section 3.5.1).
3.6.4 View Service Data
This function is used to read the value of internal parameters used by the General
Electric personnel during the Hydran M2-X maintenance or troubleshooting
procedures.
3.6.5 System Config
3.6.5.1 Current Config
• Comm#1: There is no device currently connected to the communication port #1
of the controller board.
CAUTION
CAUTION
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• Comm#2: The TDM and RS-485 link board is currently connected to the
communication port #2 of the controller board.
• IO#1: Used to connect one of the three types of optional I/O interfaces (analog
input, 4-20 mA analog output or TDM signal).
• IO#2: Same as IO#1
• IO#3: Same as IO#1
• IO#4: Same as IO#1
• Sensor Card #1: Currently, this port is used by the H2/H2O/B.P. Temp card,
which is an interface for the gas sensor, moisture sensor and heater plate
temperature signals.
• Sensor Card #2: There is currently no such card.
• Sensor Card #3: There is currently no such card.
3.6.5.2 Detected Config
This function is identical to Current Config. See Section 3.6.5.1.
3.6.6 Service History
This function is identical to View Readings > View History Data > Service Hist.
(see Section 3.4.2.4).
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3.6.7 Software Version
• HM2-X Version: Version number of the Hydran M2-X software
• Sensor Card#1: Version number of the sensor card 1 software
• Sensor Card#2: Version number of the sensor card 2 software
• Sensor Card#3: Version number of the sensor card 3 software
3.6.8 Sensor Card Status
The Sens. Card Status function indicates which sensor card is detected by the
Hydran M2-X. A card can be Ok (present) or Not Present.
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4 Verification, Installation and Configuration
Read all warnings and recommendations in Chapter 1 before
proceeding with the installation.
4.1 Incoming Inspection
4.1.1 Reception and Unpacking
Upon reception, the shipping box contains one pre-assembled Hydran M2-X.
1. Open the shipping box, and remove the documentation and the small bag
containing the accessories and tools.
2. Carefully remove the Hydran M2-X from the shipping box.
Do not remove the plastic cap from the Hydran M2-X sensor.
This cap protects the sensor’s threads and membrane.
Note: Keep the packing material for storage or further shipment of the Hydran
M2-X.
4.1.2 Shipping List
This Section lists all items included in the shipment of a Hydran M2-X. If any item
is missing, contact the General Electric Customer Service (the coordinates can be
found at the bottom of page 9).
1. One pre-assembled Hydran M2-X, including:
• Cover.
• Sensor with protective plastic cap.
• Electronic card cage with optional I/O.
• Heater plate.
• Sensor clamp.
2. Software and manuals:
• The installation CD-ROM that includes the following items:
– Perception Desktop software.
– The latest version of the embedded programs (firmware; for more
information, see Appendix F).
– The three manuals in PDF format: the Hydran M2-X Instruction Manual
(this manual), the Hydran M2-X Installation Guide and the Perception
Software Manual.
WARNING
CAUTION
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– The Hydran M2-X Installation Guide.
3. Set of tools and accessories:
• 3/16-in Allen key with 9-in T-shape handle (part number 11817), used for
the four screws of the cover.
• 5/32-in Allen key with short L-shape handle (part number 10013), used for
the sensor’s bleed screw.
• 1/16-in Allen key with short L-shape handle (part number 18048), used for
the sensor clamp set screw.
• Spanner wrench, used for the sensor clamp.
• Roll of Teflon tape (part number 10521).
• 1.8-m (6-ft) RS-232 cable (part number 12309).
4.1.3 Inspection
1. Using the shipping list (see Section 4.1.2), ensure all items are present.
2. Remove the four screws (for location, see Figure 2-3) that maintain the cover
in place, using the long 3/16-in Allen key with a 9-in T-shape handle.
3. Remove the cover.
4. Inspect the cover, sensor and electronic card cage for any visual damage
(bump, scratch or others).
5. Ensure the serial numbers of the following Hydran M2-X’s components
correspond to those indicated on the Test Certificate and Data Sheet (for an
example, see Figure 3-12) and the shipping box:
• Serial number of the sensor (located under the sensor’s connector; see
item 5 in Figure 2-7).
• Serial number of the Hydran M2-X (located on the heater plate).
Note: Each Hydran M2-X is configured for a specific sensor. If several Hydran M2-
X’s are received, take the necessary precautions not to swap the sensors and
Hydran M2-X’s.
6. Ensure the installed I/O options (see item 3 in Figure 2-5) correspond to those
indicated on the Test Certificate and Data Sheet (for an example, see Figure
3-12) and the purchase order.
7. Report any discrepancies to the company supervisor and the General Electric
Customer Service (the coordinates can be found at the bottom of page 9).
Note: Never return equipment without first contacting the General Electric
Customer Service (the coordinates can be found at the bottom of page 9).
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4.1.4 Storage
If the Hydran M2-X is to be stored (or unpowered), it is recommended to keep the
product in its original shipping box. The plastic cap must be left on the adaptor to
protect its threads and the membrane. The product can be stored (or unpowered)
for up to six months in a fully enclosed building that is free from damp and extremes
in ambient temperature. The storage facility temperature should be between 5 and
45 °C (41 °F and 113 °F) with a non-condensing, relative humidity between 5 and
95%. If these limits are likely to be exceeded, please contact the General Electric
Customer Service (the contact details can be found at the bottom of page 9). These
restrictions do not apply to transportation.
If the product has been stored for more than six months, it is recommended to
replace the battery before installation and powering-up. For the battery replacement
procedure, see Appendix G.
4.2 Verification of Operation Prior to Installation
It is strongly recommended to verify the operation of all Hydran M2-X’s before
installation in the field (for the installation procedure, see Section 4.3). Verification
confirms that no damage occurred during shipping and allows the user to become
familiar with the Hydran M2-X.
Note: It is highly recommended that the parameters of each Hydran M2-X
(identification number, power station identification number, communication speed,
operation mode of relays, etc.) be set before field installation.
The Hydran M2-X’s user interface (keypad and display) is described thoroughly in
Chapter 3.
4.2.1 Preparation
1. Remove the four screws (for location, see Figure 2-3 that maintain the cover
in place, using the long 3/16-in Allen key with a 9-in T-shape handle.
2. Remove the cover and place it aside.
3. Remove the plastic cover from the ac power supply terminal block.
4. Temporarily connect a three-wire cable to the Hydran M2-X’s ac power supply
terminal block. For identification, see Section 2.3.3; for wiring details, see
Section D.4.
Strip each wire to a maximum of 8mm before installing it. Be
sure to insert all strands in the terminal.
5. Connect this cable to the power supply.
CAUTION
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Turn off the electric power at the switch or circuit
breaker provided for disconnection before making any
electrical connections, and ensure a proper ground
connecting is made before connecting line voltage.
Failure to do so can result in property damage,
personal injury and/or death.
Note: The external ac power supply range is 110 Vac ± 15 % or 230 Vac ± 15 %, and
from 47 to 63 Hz.
6. Power up the Hydran M2-X. The Main Menu should be displayed.
7. Wait for five minutes or press the Esc key to switch to the Main Display mode
(see Section 3.1.2.3). Observe the various readings in each of the three
screens; it is normal for certain values to be low.
8. Wait a few minutes and touch the heater plate; it should be warm.
9. Proceed as follows to confirm keypad operation:
• Press the Main Menu context key. The Main Menu should be displayed.
• Click the Down arrow key two times to highlight Setup and press the Enter
context key.
• Try each arrow key and verify if the “cursor” moves in the corresponding
direction.
10. Make a shadow over the Hydran M2-X’s display and verify the backlighting
is functioning. The display should be readable under all ambient lighting
conditions.
4.2.2 Setting the Date and Time
1. Access Setup > Date & Time.
2. If necessary, set parameters Current Date and Current Time to local values.
4.2.3 Verifying the Sensor’s Serial Number
1. Access Service > Sensor Param > Gas Sensor Param and press Enter.
2. Compare the serial number displayed on the screen with the one engraved
under the sensor’s connector (see item 5 in Figure 2-7).
3. Press Esc to return to the previous level, select H
2
O Sensor Param and press
Enter.
4. Again, compare the serial number displayed on the screen with the one
engraved under the sensor’s connector.
4.2.4 Verifying the State of the Gas Detector
WARNING
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1. Access Service > Sensor Test > H2 Sensor Test and press Enter.
2. Press Ok to start the test.
3. Wait for a few seconds; the Hydran M2-X’s display should indicate the
message Good. If another message is displayed, see Section 8.1.
4.2.5 Verifying the Battery Voltage
1. Access Service > View Service Data.
2. Read the value of the parameter Battery. The value must exceed 2.85 V. If
not, contact the General Electric Customer Service (the coordinates can be
found at the bottom of page 9).
4.2.6 Verifying the Alarm Relays (If Used)
The steps described in this Section may be used during the Hydran M2-X
verification, maintenance and troubleshooting procedures.
Note: To verify the relays using the alarm contacts, connect an ohmmeter to the alarm
contacts terminal block (15 terminals). To identify each terminal, see Section D-8.
1. Access Test > Relay Test.
2. Simulate an alarm by setting parameter Relay #1 Mode to Force On. Make
sure:
• The NO contact of this relay is closed.
• The NC contact of this relay is open.
• The state of the other alarm contacts has not changed.
3. Perform the same test for relays #2, #3 and #4.
4. Simulate an alarm due to system fault conditions by setting parameter SysOK
Relay Mode to Force Off. Make sure:
• The NO contact of the system fault relay is open.
• The NC contact the system fault relay is closed.
5. Cancel the alarm due to system fault conditions by setting parameter SysOK
Relay Mode to Normal. Make sure:
• The NO contact of the system fault relay is closed.
• The NC contact of the system fault relay is open.
6. Cancel the other alarms by setting parameters Relay #1 Mode to Relay #4
Mode to Normal. Make sure:
• The NO contacts of relays #1 to #4 are open.
• The NC contacts of relays #1 to #4 are closed.
• The NO contact of the system fault relay is closed.
• The NC contact of the system fault relay is still open.
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6. If necessary, set parameters Relay #1 Mode to Relay #4 Mode and SysOK
Relay Mode to their initial mode.
4.2.7 Verifying the Standard TDM Signal (If Used)
This procedure requires a Hydran 201Ci-C Controller.
4.2.8 Verifying the Analog Input(s) (If Used)
The procedure described below should be performed for each optional 4–20 mA
analog output interface installed on the right side of the electronic card cage. Each
analog output terminal block has four terminals.
1. Configure the analog inputs before verifying them. See Section 4.4.7.
2. Connect a 4–20 mA calibrator-simulator (for example: Model CL-303-2 from
Omega) to terminals 2 (-) and 3 (+) of the analog input terminal block to verify.
For technical details on the terminal block, see Section D-2.
3. Access Setup > I/O Setup > An. Input Setup and select the analog input
interface to verify. In the screen that is now displayed, proceed as follows:
• Set the calibrator to 4 mA.
– IO State should display 0.0 ± 0.1 %.
– The line below IO State should display the minimum reading value
(defined during the configuration).
• Set the calibrator to 20 mA.
– IO State should display 100.0 ± 0.1 %.
– The line below IO State should display the maximum reading value
(defined during the configuration).
• Set the calibrator to 12 mA.
– IO State should display 50.0 ± 0.1 %.
– The line below IO State should display the middle reading value.
4. Disconnect the digital multimeter.
Note: If the input reading does not correspond to one of the above values,
calibrate this analog input.
4.2.9 Verifying the Analog Output(s) (If Used)
The procedure described below should be performed for each optional 4–20 mA
analog output interface installed on the right side of the electronic card cage. Each
analog output terminal block has four terminals.
1. Configure the analog outputs before verifying them. See Section 4.4.8.
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2. Set a digital multimeter to dc current (1 % accuracy and 0.01 mA resolution)
and connect it to terminals 2 (-) and 3 (+) of the analog output terminal block
to verify. For technical details on the terminal block, see Section D-3.
3. Access Setup > I/O Setup > An. Output Setup and select the analog output
interface to verify. In the screen that is now displayed, set the Mode
parameter as follows:
• Press Change, select 0% and press Enter.
– For 4–20 mA analog outputs, ensure that the output current is 4.00 ±
0.01 mA.
• Press Change, select 50% and press Enter.
– For 4–20 mA analog outputs, ensure the output current is 12.00 ± 0.02
mA
• Press Change, select 100% and press Enter.
– For 4–20 mA analog outputs, ensure that the output current is 20.00 ±
0.02 mA
4. Set the Mode parameter back to Normal.
5. Check the 4–20 mA supply voltage.
6. Disconnect the digital multimeter.
Note: If the output current does not correspond to one of the three above values,
calibrate this analog output.
4.2.10 Verifying the RS-232 Communications (If Used)
This verification procedure requires Perception software.
1. With the supplied RS-232 cable, connect the Hydran M2-X to a laptop
computer through their DB-9 connector.
2. Access Setup > Comm Setup > Identification.
3. Note the value of parameter Monitor ID and set it to 1.
4. Run the Perception software on the laptop computer.
5. In the Relays/Analog menu of Perception, force on and off the alarm relays to
test communications.
6. In the Relays/Analog menu set the state of the alarm relays to Normal upon
completion of the tests.
7. Disconnect the RS-232 link cable.
8. Access Setup > Comm Setup > Identification.
9. Set parameter Monitor ID to its initial value (noted during step 3).
4.2.11 Conclusion
The Hydran M2-X verification is now completed.
1. Power down the Hydran M2-X.
2. Disconnect the power supply cable from the Hydran M2-X.
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3. Close the Hydran M2-X’s cover; make sure the gasket is properly positioned
between the heater plate and the cover.
4. Store the Hydran M2-X in its shipping box, ready for installation.
Note: For storage information, see Section 4.1.4.
4.3 Installation
All procedures in this manual must be strictly adhered to.
Any deviation from these could cause irreversible damages
to the Hydran M2-X and/or the transformer being monitored,
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.
The installation and commissioning of the Hydran M2-X are divided in several
steps. This Section provides a detailed description of each step; Appendix B provides
a checklist for the entire installation procedure.
It is strongly recommended to verify the operation of all
Hydran M2-X’s before installation in the field. The verification
also allows the user to become familiar with the Hydran M2X; see Section 4.2.
Note: It is strongly recommended that the parameters of each Hydran M2-X
(identification number, power station identification number, communication
speed, operation mode of relays, etc.) be set before field installation.
4.3.1 Overview
4.3.1.1 Typical Installation
The Hydran M2-X is typically installed on a full-bore gate or ball valve of a
transformer. There are two cables:
• The Hydran M2-X’s power supply cable is passed in a flexible (recommended)
or rigid steel conduit toward a supervisory control and data acquisition
(SCADA) system.
• The alarm cable is passed in a flexible (recommended) or rigid steel conduit
toward a SCADA system.
4.3.1.2 Mounting Locations of the Hydran M2-X on a Transformer
WARNING
CAUTION
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Determining where to install a Hydran on-line incipient fault monitor on a
transformer can sometimes be challenging.
A Hydran M2-X monitor can be installed on any available transformer valve.
However, care must be taken in selecting a suitable location while respecting the
overall dimensions and weight of the monitor.
To achieve optimal performance from the Hydran monitor, it is imperative that:
• the Hydran is always mounted horizontally on the transformer valve
• there is no restriction between the Hydran and the main body of oil
• there is a good circulation of oil flowing towards the Hydran.
Figure 4-1 illustrates some typical valve locations that can be found on a
transformer. These locations vary between transformers, but there are some valve
locations on a transformer where the oil circulation is much better due to the nature
of a transformer’s operation.
The circulation of oil is generally the same in all transformers — the natural
convection of the oil circulates from warm to cool as the transformer warms up. The
oil at the bottom is usually cooler than the top as it returns from the cooling system,
as illustrated in Figure 4-1.
Figure 4-1: Typical Installation of the Hydran M2-X
Location #A: Cooling Return
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Some transformers may have a valve that is on the pipe that joins the
bottom of the cooling system to the transformer main tank. This location
offers an excellent circulation of oil. It allows for easy access for installation
and taking oil samples directly from the Hydran M2-X.
Note: If a pump is part of the cooling system, it is recommended that the
Hydran M2-X be installed on the discharge side of the pump.
Location #B: Drain Valve
All transformers are equipped with a drain valve. This location allows for
easy access for installation and taking oil samples directly from the Hydran
M2-X. Oil flow is reduced compared to the other locations and over time
there can be a buildup of sludge which can further impede the oil flow.
Note: A minimum distance of 12 in. between the ground and the valve is
required so that the Hydran enclosure and cables can be properly installed.
Location #C: Main Tank
Some transformers are equipped with a valve that is mounted towards
the middle portion of the transformer main tank. This location offers good oil
circulation and is easily accessible for installation and taking oil samples
directly from the Hydran M2-X.
Location #D: Upper Filling Valve
Most transformers are equipped with an upper filling valve. This location
offers excellent oil circulation, but is not easily accessible and may require an
outage to install the Hydran M2-X.
Location #E: Top of Cooling System
Some transformers may have a valve that is mounted on the pipe that
joins the top tank of the transformer to the top of the cooling system. This
location offers an excellent circulation of oil; but is not easily accessible and
may require an outage to install the Hydran M2-X.
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4.3.1.3 Warnings
This Section details important considerations for the installation of the Hydran
M2-X.
1. Always mount the sensor on a full-bore gate or ball valve where there is
sufficient convective oil flow.
2. If the Hydran M2-X is mounted directly on the wall of the transformer tank,
ensure it is installed below the oil level.
3. No obstructions (baffle, pipe, etc.) must exist behind the valve (inside the tank).
4. The Hydran M2-X is installed on a valve with a 1.5 in (approximately 38 mm)
nominal diameter (NPT female threads) or larger. If necessary, use a reducing
bushing.
Note: General Electric does not recommend installing the Hydran M2-X on a 1-in
diameter valve, due to the weight of our instrument and the vibration of the
transformer. Our tests have indicated that if a 1-in pipe is used to install the Hydran
M2-X to a distance exceeding 63 mm (2.5 in), the pipe may break under certain
conditions.
To ensure sufficient oil flow through the gas detector’s
membrane, the nominal diameter of the valve should never
be below 25 mm (1 in).
5. For valves 1.5 in or more in diameter: The total distance between the Hydran
M2-X and the mounting point of the valve must not exceed six times the
nominal diameter of the valve (230 mm [9 in] for a 38-mm [1.5-in] valve); see
Figure A - 7.
6. Ensure there is enough clearance above and below the Hydran M2-X to
separate it from its sensor. For more information, see Section A.2.1.
7. The Hydran M2-X must always be easily accessible.
8. The body of the valve should be grounded.
9. The Hydran M2-X weighs approximately 7.5 kg (16.5 lb). If the selected valve is
subject to strong vibrations, install a supporting bracket to reduce the load on
the valve. In case of doubt, consult the engineer responsible for the installation.
10. Do not install the Hydran M2-X on an elbow or a fitting box (see Figure 1-5).
The turbulent oil flow at these locations may result in inaccurate gas level
readings.
4.3.1.4 Vertical Installations of the Hydran M2-X
Regardless of the selected location, it is recommended to mount the Hydran M2X horizontally (as shown on Figure 4-1). If no horizontal valve is available, a vertical
installation may be acceptable; contact the General Electric Customer Service (the
coordinates can be found at the bottom of page 9).
If the Hydran M2-X is installed vertically, note the following points:
• The sensor’s threaded extremity must be oriented upward.
CAUTION
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• The oil temperature at this location must always be below 30 °C (86 °F).
• Do not use a 90° elbow to convert a vertical installation to a horizontal
installation.
• It is recommended to set the temperature set point (parameter Temp Set
Point in Setup > Temp. Setup; see Section 3.2.4) of the sensor to 45 °C (113 °F).
4.3.1.5 Tools, Accessories and Materials Required
In addition to the supplied tools and accessories (see the shipping list in Section
4.1.2), you will need the following ones to install the Hydran M2-X (see Figure 4-2):
• 3-mm (1/8-in) flat-blade screwdriver.
• #2 Phillips screw driver.
• Pliers or adjustable wrench.
• Wire stripper.
• Wire cutter.
• Bucket (or pan) and rag.
• Oil-absorbing rags.
• Optional) digital multimeter.
• 15-in (approximately 381 mm) adjustable wrench with smooth, non-marring 3
5/8-in (approximately 92 mm) jaws. An adjustable wrench can also be used.
Never use a wrench with jagged jaws.
The following material is also required:
• 1/2-in (approximately 12.7 mm) NPT cable fittings, PG-13 or M2-X0, with
locknuts and sealing gaskets.
• Cable ties.
• Conduits.
• Cables (for details, see Appendix D at page 166).
Note: One cable fitting, conduit and cable are required to connect the ac power
supply. Optionally, additional material is required for the alarms, RS-485 link, optional
analog input(s), optional analog output(s), standard and optional TDM signals. More
than one cable can pass through the same conduit, as long as the cables are
connected to the same side of the electronic card cage. It is recommended to use
flexible steel conduits rather than rigid ones. If preferable, an external junction box
could be used.
4.3.2 Verifying the Serial Numbers
Ensure step 5 on page 67 has been performed.
SUPPLIED WITH THE HYDRAN M2-X
CAUTION
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3/16-in Hex Key with 9-in
Blade & Cushion Grip T-
Handle
1/16-in and 5-32-in
standard Hex (Allen) L-Keys
Spanner wrench
Roll of PTFE tape
TO BE SUPPLIED BY THE INSTALLER
3-mm (1/8-in) Slotted
Screwdriver
#2 Phillips Screwdriver
Adjustable Pliers
or Wrench
Wire Stripper
Wire Cutter
Bucket and Rags
Adjustable Wrench with
smooth non-marking jaws
Figure 4-2: Tools Required for the Installation
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4.3.3 Preparing the Valve
1. Wipe the outside of the valve.
2. Clean the valve’s threads.
3. Dispose of the collected oil according to the company regulations.
4.3.4 Separating the Sensor from the Hydran M2-X
Separate the sensor from the Hydran M2-X. Proceed as follows (see Figure
below):
1. Remove the set screw (arrow 1 on Figure 4-3 that secures the Hydran M2-X
and its sensor together.
Figure 4-3: Separating the Sensor from the Hydran M2-X
2. Remove the sensor clamp using the spanner wrench.
3. Carefully pull the sensor a few centimeters from the enclosure.
A cable connects the sensor to the electronic card cage.
4. Disconnect the connector located at the back of the sensor (see Figure 4-3).
5. Rotate the connector anticlockwise (approximately 1/8 of a turn), then
carefully pull it from the sensor.
CAUTION
CAUTION
Oil on sensor
CAUTION
Sensor cable
1. Remove set screw.
2. Remove clamp using spanner wrench.
3. Carefully pull out sensor.
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Never touch the gas detector or humidity sensor inside the
Hydran M2-X sensor. Touching them may damage the
Hydran M2-X.
Figure 4-4: Disconnecting the Sensor Cable
6. Inspect the membrane inside the sensor by looking at it; its surface must be
flat, without cut or tear (a small curl is normal).
7. Store all parts, including the sensor, in a box and in a safe place until ready for
installation.
CAUTION
1. Rotate sensor connector anti-clockwise
(approximately 1/8 turn).
2. Pull connector from sensor.
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4.3.5 Installing the Sensor onto the Valve
The sensor has 1.5 in (approximately 38 mm) NPT male threads to screw onto the
valve. If an adaptor is not required to mount the sensor onto the valve, skip steps 1
to 3.
1. If using a finned, high-temperature adaptor, a thin layer of thermal joint
compound must be applied on the outside of the mounting adaptor before
assembling all parts; remove excess of compound with solvent.
2. Wrap PTFE tape on the adaptor’s threads.
Use only PTFE tape to seal the adapter’s threads. Wrap at
least four to five layers of tape around the threads.
3. Screw the adaptor onto the valve and tighten it using an adjustable wrench.
Never use a wrench with jagged jaws.
4. Wrap PTFE tape on the sensor’s threads. See Figure 4-5.
Use only PTFE tape to seal the sensor’s threads. Wrap at
least four to five layers of tape around the threads.
Figure 4-5: Wrap the Sensor’s Threads with PTFE
5. Loosen the bleed screw.
6. Install the sensor clamp around the sensor. See Figure 4-6 overleaf.
CAUTION
CAUTION
CAUTION
Always wrap the tape counter to
the threads, as shown here.
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Figure 4-6: Mount the Sensor Manually onto the Valve and Tighten it, Using an Adjustable Wrench
7. Screw the sensor manually onto the valve.
8. Tighten the sensor using an adjustable wrench. Do not use excessive force
when tightening the sensor onto the valve.
Note: If the sensor is installed horizontally, ensure the bleed screw is on top (at the “12
o’clock” position). See Figure 4-7 on the next page.
9. Ensure the O-ring is in place on the sensor flange.
1. Install clamp around sensor.
2. Install sensor on valve.
3. Tighten using adjustable wrench.
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Figure 4-7: The Bleed Screw Must Be on Top, at the 12 O’clock Position
4.3.6 Opening the Valve and Purging Air from the Sensor
Perform this step according to company regulations. Proceed
carefully to avoid introducing air into the transformer. Use a
bucket to collect the oil.
Proceed as follows (see Figure 4-8):
1. Using the 5/32-in Allen key, fully close the sensor’s bleed screw and then open
it 1/8 of a turn.
2. Slowly open partially the transformer valve until oil leaks out of the sensor’s
sampling port.
3. Wait until there are no more air bubbles present in the oil and shut the bleed
screw tightly.
4. Open the valve completely.
5. Wipe all traces of oil from the sensor.
Do not use any solvent.
6. Inspect the sensor for oil leaks.
7. Tighten the bleed screw.
8. Dispose of the collected oil according to the company regulations.
CAUTION
CAUTION
Bleed screw must be on top,
at
the “12 o’clock” position when
sensor is installed horizontally.
O-ring
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Figure 4-8: Opening the Valve and Purging the Air from the Sensor
Note: Prior to installing the Hydran M2-X onto the transformer valve, it is
recommended to drain approximately 2-4 liters of oil from the valve. This clears any
contaminants and moisture that may have accumulated inside the transformer valve.
4.3.7 Installing the Hydran M2-X on the Sensor
Proceed as follows (see Figure 4-9 on the next page):
1. Push the sensor cable connector into the sensor connector.
2. Rotate the connector clockwise (approximately 1/8 of a turn).
3. Position the enclosure and push the Hydran M2-X onto the sensor.
1. Loosen bleed screw.
2. Slowly open valve.
3. Purge air from sensor
(collect oil in bucket).
4. Tighten bleed screw.
5. Wipe oil from valve and
sensor using rag.
Note: The clamp ring is not
shown for clarity purposes.
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Ensure the sensor cable is not squeezed between the sensor
and the enclosure. Squeezing the cable may damage it.
CAUTION
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Figure 4-9: Installing the Hydran M2-X on the Sensor
4. Install the sensor clamp and tighten it using the spanner wrench.
5. Tighten the set screw using the 1/16-in Allen key.
4.3.8 Grounding the Hydran M2-X Enclosure
1. Connect a ground wire to the Hydran M2-X’s external ground lug (see Figure
4-10 on the next page), using a 10-6 AWG copper wire.
2. Ground the other end of this cable by connecting it to the transformer ground
grid.
Improper grounding could cause erratic operation and
damage the electronic circuit.
Note: If for operating consideration a non- grounded installation is required, contact
the General Electric Customer Service (the coordinates can be found at the bottom of
page 9).
1. Insert the sensor cable connector into the sensor
connector.
2. Rotate connector clockwise (approximately 1/8 turn).
3. Position the enclosure and push it on to the sensor; taking
care not to squeeze the sensor cable between the sensor
and the enclosure.
4. Install the sensor clamp and tighten it using the supplied
spanner wrench.
5. Tighten set screw using 1/16-in Allen key.
CAUTION
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Figure 4-10: Grounding the Hydran M2-X Enclosure
4.3.9 Installing the Cable Conduits
Note the following considerations prior to installation:
• All cables connected to the Hydran M2-X must be run through steel conduits
or must be armored.
• Conduits, or cable armors, should be made of steel to provide shielding
against magnetic fields.
• Flexible rather than rigid conduits should be used near the Hydran M2-X to
ease installation and servicing.
Proceed as follows:
1. Remove the cover’s four retaining screws using the supplied Allen key. See
Figure 4-11 on the next page.
2. Pull the cover.
3. Remove the cap from the desired conduit fittings. Install the necessary
watertight conduit fittings. See Figure 4-12.
All conduits, cables and fittings must be high quality and
watertight to avoid water ingress in the Hydran M2-X.
WARNING
Connect ground wire to
ground lug using a 10-6
AWG copper wire.
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Figure 4-11: Removing the Hydran M2-X Cover
4. Mount a conduit to each conduit fitting. Cables connected to terminal blocks
located on one side of the Hydran M2-X must pass through a conduit fitting
mounted on the same side. When possible, more than one cable can be run in
a single conduit. The following cables can be run (for the location of each
terminal block, see Figure 2-5 and Figure 2-6):
• Hydran M2-X’s left side (when facing the display):
– ac power supply cable.
– Alarm contacts cable (connected to a SCADA system)
• Hydran M2-X’s right side:
– Input cable of the RS-485 link (connected to another Hydran M2-X).
– Output cable of the RS-485 link (connected to another Hydran M2-X or
to a Hydran 2901Ci-C controller).
– Up to four optional cables for I/O (analog inputs and/or outputs).
5. Ground the conduits and/or cable shields at some point. Follow the company
regulations meticulously. To ground the conduit of the RS-485 cable, see
Section 5.2.
1. Remove four retaining screws (using
supplied Allen key), 4 lock washers
and 4 flat washers.
2. Pull out cover.
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The Hydran M2-X must always be grounded, even if the
transformer tank is grounded at a single point and
monitored for tank-to-ground currents.
Figure 4-12: Installing Cable Conduits
4.3.10 Installing the Cables
The Hydran M2-X’s operation may be affected if wires are not
connected correctly. Be careful when installing and inserting
each wire. Be sure to insert all strands in the terminal;
strands that touch two terminals will cause problems. Strip
each wire to a maximum of 8 mm before installing it. Do not
leave trims of metallic strands inside the Hydran M2-X’s
enclosure.
The first temporary plug (see item 1 in Figure 2-6 must be
removed and replaced with a watertight fitting to connect
the ac power supply cable (Section 4.3.10.6).
1. Mount the required, watertight conduits fittings: ½”-
NPT, PG-13 or M2-X0, with locknuts and sealing
gaskets.
2. Mount required flexible conduits.
3. Ground all metallic conduits.
4. Ensure that the plugs of all unused openings are
CAUTION
CAUTION
CAUTION
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4.3.10.1 Input and Output Cables of the RS-485 Link
For installation of the RS-485 network link cable, see Section 5.2.1.
4.3.10.2 Alarm Cable (if Used)
Proceed as follows:
1. Run the alarm cable through a conduit, from the Hydran M2-X to the SCADA
or annunciator system.
2. Verify all wires are identified at both ends.
3. Connect the wires to the alarm contacts terminal block of the Hydran M2-X.
For wiring details, see Section D.5.
4. Connect the other end of the cable to the SCADA or annunciator system.
4.3.10.3 Standard TDM Signal (Optional)
This TDM signal is supplied to be interfaced with a Hydran 201Ci -1 or Hydran
201Ci-4 Controller. For more information on the TDM signal, see the Hydran 201i
System Instruction Manual.
Note: The TDM is used with the Hydran 201Ci-1 or Hydran 201Ci-4 Controller to
display remotely the gas level and the status of alarm relays 1 and 2. There is no
display of the water level or the status of alarm relays 3 and 4.
Proceed as follows:
1. Run the TDM cable (shielded triad) through a conduit, from the Hydran M2-X
to the Hydran 201Ci-1 or Hydran 201Ci-4 Controller.
2. Verify all wires are identified at both ends.
3. Connect the wires to the TDM/RS-485 terminal block of the Hydran M2-X. For
wiring details, see Section D-1.
4. Connect the other end of the cable to the Hydran 201Ci-1 or Hydran 201Ci-4
Controller.
4.3.10.4 Analog Input Cable (if Used)
Proceed as follows:
1. Run the cable through a conduit, from the Hydran M2-X to the sensor that
supplies the analog signal.
2. Verify all wires are identified at both ends.
3. Connect the wires to the corresponding I/O terminal block of the Hydran M2-
X. For wiring details, see Section D-2.
4. Connect the other end of the cable to the sensor.
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4.3.10.5 Analog Output Cable (If Used)
Proceed as follows:
1. Run the cable through a conduit, from the Hydran M2-X to the SCADA system.
2. Verify all wires are identified at both ends.
3. Connect the wires to the corresponding I/O terminal block of the Hydran M2-
X. For wiring details, see Section D-3.
4. Connect the other end of the cable to the SCADA system.
4.3.10.6 AC Power Supply Cable
Turn off the electric power power at the switch or
circuit breaker provided for disconnection before
making any electrical connections, and ensure a proper
ground connection is made before connecting the
power supply. Failure to do so can result in property
damage, personal injury and/or death.
Note: The external ac power supply range is 110 Vac ± 15 % or 230 Vac ± 15 %, and
from 47 to 63 Hz.
Proceed as follows:
1. Run the cable through a conduit, from the Hydran M2-X to the power source.
The first temporary plug (see item 1 in Figure 2-6 must be
removed and replaced with a watertight fitting to connect
the ac power supply cable.
2. Remove the plastic cover from the ac power supply terminal block.
3. Connect the wires to the ac power supply terminal block of the Hydran M2-X.
For wiring details, see Section D-7.
4. Connect the other end of the cable to the power source. An external circuit
breaker must be installed on the ac source and labeled accordingly,
complying with the applicable regulations.
Note: Fuses or an external circuit breaker must be installed and duly identified near
the Hydran M2-X, in accordance with the IEC* 947-1 and 947-3 standards, the local
building codes or the current edition of the National Electrical Code.
5. Power up the Hydran M2-X.
6. Verify the display is lit.
Note: The earth/ground terminal (E/G) must be connected to the power source ground
(green wire) or directly to the transformer tank. For special considerations regarding
grounding, see the note at the beginning of Section 4.3.8.
Never perform high-voltage tests (mega-ohm measurements
using a Megger instrument) on cables connected to a Hydran
M2-X. Never apply high voltages to the Hydran M2-X
terminals, as they are equipped with surge protection
devices that could be damaged by Megger tests.
WARNING
CAUTION
CAUTION
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4.3.11 Verifying the Hydran M2-X Operation
1. After configuration of the Hydran M2-X (see Section 3.2 and Section 3.3),
fasten the cover with the four screws. Ensure the gasket is properly
positioned between the heater plate and the cover.
2. Verify all cable entry points are watertight.
3. Verify the heater plate is warm.
The surface of the base plate can be hot. Heating for the
dynamic oil sampling system (Section 2.5) is achieved using
heating resistors mounted on the internal side of the base
plate.
4.4 Configuring the Hydran M2-X
The Hydran M2-X configuration can be performed using either the Hydran M2-X’s
keypad or the Perception software running on the host or laptop computer. It is
recommended to use the Perception software because it makes the configuration
task much easier. See the Perception Software Manual.
The parameter configuration detailed in the following pages is written for those
who are using the Hydran M2-X’s display and keypad. To set up the communication
channel prior to the use of the Perception software, see Section 5.2.2 to Section
5.2.3.2.
Note: The values indicated in this Section are only given as an indication and may
differ from user requirements. The value of the various parameters should be decided
during the planning stage of the installation. Make sure to verify all parameters. It is
recommended to log the value of the Hydran M2-X’s parameters in Appendix B.
4.4.1 Setting the Date and Time
1. Access Setup > Date & Time (see Section 3.4.3).
2. If necessary, set the Current Date and Current Time parameters.
CAUTION
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4.4.2 Setting the Parameters of the History Files
1. Access Setup > History Setup > History Log Rate (see Section 3.2.6.1).
2. Verify and set, as required, the Short Term Rate as well as the Long Term #1
to Long Term #4 logging hours.
3. Press Esc, select Clear HM2-X Hist File and press Enter.
4. Erase the content of the history files by selecting each option and pressing
Ok.
4.4.3 Setting the Alarm Parameters
1. Wait at least 30 minutes after powering up the Hydran M2-X or until the gas
and moisture levels read by the Hydran M2-X are stable.
2. Access Alarms > Alarms Setup > Hydran Alarm Setup (see Section 3.3.2.1).
Verify and set, as required, all parameters.
3. Access Alarms > Alarms Setup > H2O Alarm Setup (see Section 3.3.2.2).
Verify and set, as required, all parameters.
4. Access Alarms > Alarms Setup > Temp Alarm Setup (see Section 3.3.2.3).
Verify and set, as required, all parameters.
5. Access Alarms > Alarms Setup > Battery Alarm Setup (see Section 3.3.2.4).
Verify and set, as required, all parameters.
6. Access Alarms > Alarms Setup > Analog Input Alarm Setup (see Section
3.3.2.5). Verify and set, as required, all parameters.
7. Access Alarms > Alarms Setup > Sys. Fault Trigger (see Section 3.3.2.6).
Verify and set, as required, all parameters.
4.4.4 Verifying the Battery Voltage
1. Access Service > View Service Data.
2. Verify the battery voltage (Battery) exceeds 2.85 V; if it is below 2.85 V, replace
the battery (see Appendix G). For the battery specifications, see Section 9.3.1.
4.4.5 Setting the Dynamic Oil Sampling System Parameters
1. Access Setup > Temp. Setup (see Section 3.2.4).
2. Verify and set, as required, the dynamic oil sampling system parameters. For
more information, see Section 3.2.4.
3. Clear the Sensor Hist File.
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4.4.6 Setting the Readings Parameters
1. Access Setup > Readings Setup > Gas Reading Setup (see Section 3.2.8.1).
Verify and set, as required, the gas reading parameters.
2. Press Esc and access H2O Reading Setup (ses Section 3.2.8.2). Verify and set,
as required, the parameters for the moisture and relative humidity average
calculation.
3. Press Esc; verify and set, as required, the Sens. Temp Avg Per. parameter
(used for the temperature average calculation of the sensor).
4.4.7 Configuring the Analog Input(s) (If Used)
1. Access Service > System Config > Current Config. Verify that the displayed
list corresponds to the Hydran M2-X configuration. If not, access Service >
System Config > Detected Config; the Hydran M2-X detects the installed
configuration. Press Save to reboot the Hydran M2-X.
2. Access Setup > I/O Setup > Analog In Setup (see Section 3.2.9.1).
Note: The following steps must be performed for each analog input interface.
3. Select the analog input interface to configure; the corresponding parameter
screen is now displayed.
4. Make sure Input Range is set to 4–20 mA.
Note: Analog input interfaces are calibrated at the factory for a 0–20 mA
range. However, when parameter Input Range is set to 4–20 mA, the interface
automatically adapts to this range.
5. In the parameter screen, scroll down the list of parameters and select option
Configuration. The Configuration screen is now displayed.
6. Select Identification and set all parameters as desired.
7. Press Esc to return to the Configuration screen and select Readings Setup.
Set all parameters as required.
8. Perform the verification procedure described in Section 4.2.8.
4.4.8 Configuring the Analog Output(s) (If Used)
1. Access Service > System Config > Current Config. Verify that the displayed
list corresponds to the Hydran M2-X configuration. If not, access Service >
System Config > Detected Config; the Hydran M2-X detects the installed
configuration. Press Save to reboot the Hydran M2-X.
2. Access Setup > I/O Setup > Analog Out Setup (see Section 3.2.9.2).
Note: The following steps must be performed for each analog output interface.
3. Select the analog output interface to configure, and then select the option
Configuration. The Configuration screen is now displayed.
4. Set all parameters as required.
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5. Perform the verification procedure described in Section 4.2.9.
4.4.9 Verifying the Sensor
1. Access Service > Sensor Test (see Section 3.5.1).
2. Press Ok to start the test. After a few seconds, the Hydran M2-X’s display
should show message Testing Success. If another message is displayed, see
Section 8.1.
Note: The keypad cannot be used for two minutes following a sensor test.
Wait before resuming the configuration.
4.4.10 Setting the Operation Mode of the Alarm Relays
For details on relays operation, see Section 6.5; for details on operation modes of
relays, see Section 6.5.3.
1. Access Test > Relay Test (see Section 3.5.2).
2. Verify and set, as required, the operation mode of each relay.
3. Verify the relay status is properly monitored by the SCADA or annunciator
system.
4.4.11 Verifying the Sensor Parameters
1. Access Service > Sensor Param > Gas Sensor Param (see Section 3.6.1.1).
2. Make sure the displayed serial number, the ten parameters (B, M, N, S and A1
to A6) and the checksum all correspond to the values on the Test Certificate
and Data Sheet (for an example, see Figure 3-12).
3. Press Esc and access H2O Sensor Param (see Section 3.6.1.2).
4. Make sure the displayed serial number, the ten parameters (C1 to C10) and
the checksum all correspond to the values on the Test Certificate and Data
Sheet.
4.4.12 Logging Values of the Service Data
1. Access Service > View Service Data.
2. Write the values of each parameter in Table B - 5.
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4.4.13 Resetting the Hourly Trend, Daily Trend and Period B
Resetting the hourly trend, daily trend and Period B consists in changing the
value of their period and then restoring them to their initial value after five minutes.
Perform this operation one hour after the initial power-up.
Proceed as follows:
1. Access Setup > Reading Setup > Gas Reading Setup.
2. Set parameter Hourly Tr. Period to 1 hour.
3. Set parameter Daily Tr. Period to 1 day.
4. Set parameter Hydran PPM Period B to 0 hour.
5. Wait five minutes and set these parameters to their default value:
• Hourly Tr. Period to 24 hours
• Daily Tr. Period to 30 days
• Hydran PPM Period B to 24 hours
For details on trend computations and reset, see Section 6.2.5.4.
4.4.14 Conclusion
If the configuration has been performed locally at the Hydran M2-X using
Perception software:
1. Access Setup > Comm Setup (see Section 3.2.7.2).
2. Disconnect the RS-232 link from the Hydran M2-X’s DB-9 connector.
3. Put the Hydran M2-X’s cover back in place (see Figure 4-13 on the page
below). Ensure the gasket is properly positioned between the heater plate
and the cover.
4. Insert the four retaining screws and washers.
5. Using the supplied Allen key, screw until they touch the heater plate.
6. Tighten the screws one by one diagonally.
The Hydran M2-X configuration is now completed.
When installing the cover, 4 screws must be tightened
correctly. A minimum torque of 50 lbf-in (5.6 Nm) is
recommended. Failure to do so may result in water ingress
inside the enclosure.
WARNING
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Figure 4-13: Fastening the Cover
4.5 Commissioning
1. Wait at least two hours for the Hydran M2-X to stabilize.
2. To verify the reading accuracy of the Hydran M2-X, compare the reading(s)
with a recent dissolved gas analysis (DGA).
3. Log the following information and keep it in a safe place:
• The serial number of each component of the network
• A general description of the installation (transformer number, power
station number, etc.).
The installation of the Hydran M2-X is now completed. If properly installed and
maintained, the Hydran M2-X provides many years of trouble-free service.
Note: Proper adjustment of trend alarm requires an observation period of trend
behavior to determine the optimal setting. See Section 6.2.5.4.
CAUTION
Gasket must be
properly in place
1. Put cover back in place.
2. Insert the four (4) screws with flat washers and split
lock washers. Using supplied Hex key tool, tighten
the screws one by one diagonally.
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5 Communications and Networking
The Hydran M2-X can be used as a stand-alone unit or within a network of up to
32 Hydran M2-X’s. Both configurations can be connected locally to a laptop
computer, or remotely to the host computer through a modem or Ethernet (via
copper wires or fiber optic).
5.1 Network Configuration Overview
As shown in the Figure below, a Hydran M2-X network is a daisy chain of Hydran
M2-X’s. The Hydran M2-X’s in the network are connected together using an RS-485
link (for technical details, see Section D-1).
Figure 5-1: Network Overview (Daisy Chaining of Hydran M2-Xs)
LED transmitters for fiber optic are classified as IEC 60825-1
Accessible Emission Limit (AEL) Class 1. Class 1 devices are
considered eye safe to the unaided eye. Do not view directly with
optical instruments.
In a network, the Perception software can communicate with each Hydran M2-X
individually because each one is identified by a unique identification number
(Monitor ID parameter) set by the user (see Section 3.2.7.1).
The Hydran M2-X’s manage all communications automatically (transmission and
reception). Data transmission is half-duplex (one direction at a time, from a single
source).
To host computer
with Perception
software via either:
• Ethernet (wire
or fiber optic)
• Modem
interface.
• Or RS-485 link
to Hydran 201Ci
controller
Daisy chain: RS-485 link, isolated, 1 triad
Maximum number of Hydran M2-Xs: 32
Maximum total length of cables: 1,200 m (4,000 ft)
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5.1.1 Local Communications with a Laptop Computer
For local communications, a single Hydran M2-X or a network of Hydran M2-X’s
can be linked directly to a laptop computer (see Figure 5-2) running Perception. To
do this, one Hydran M2-X in the daisy chain must be temporarily linked to the laptop
computer using the supplied RS-232 serial communication cable. The RS -232 cable
is attached to the Hydran M2-X’s DB-9 connector. The Hydran M2-X’s RS-232 port
should not be used for permanent connection to a computer.
Note: The maximum distance for an RS-232 local link is 7.5 m (25 ft).
Figure 5-2: Local Communications with a Laptop Computer
5.1.2 Remote Communications with a Host Computer (via Modem)
For remote communications, a single Hydran M2-X or a network of Hydran M2X’s can be linked, through a modem, to the host computer running the Perception
software. To do this, the first or last Hydran M2-X in the daisy chain must be linked
to a Hydran 201Ci Controller (equipped with a modem) using a supervisory link (see
Section 5.2.5). A typical configuration is shown in Figure 5-3 on the next page.
DB-9
connector
RS-232 Link
Laptop computer:
Fixed baud rate
8 data bits
No parity
1 stop bit
No flow control
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Figure 5-3: Remote Communications with a Host Computer via a Modem
5.1.2.1 Communications Modes
When using a modem, each Hydran M2-X in the network can be set to one of the
following modes: Call on Alarm and Answer Only. For more information, see
parameter Comm Mode in Setup > Comm Setup (see Section 3.2.7.2).
5.1.2.2 Sequence of Events in the Call on Alarm Mode
The sequence of events in the Call on Alarm mode is as follows:
1. An alarm condition is detected.
2. The Hydran M2-X sends, to the Hayes-compatible modem, the command
indicated in the Setup > Comm Setup > Modem Dial String parameter
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