doble Calisto H1 User manual
Calisto™ H1
User Guide
Calisto™ H1 User Guide
TP-CH1-Rev B 2 03/2022
This Manual is solely the property of the Doble Engineering Company (Doble) and is provided
for the exclusive use of Doble Clients under contractual agreement for Doble Test equipment
and services.
In no event does Doble assume the liability for any technical or editorial errors of commission
or omission; nor is Doble liable for direct, indirect, incidental, consequential damages, or lost
profits arising out of or the inability to use this Manual.
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is subject to restrictions as set forth in subparagraphs (c)(1) and (c)(2) of the Commercial Com-
puter Software - Restricted Rights Clause at FAR 52.227-19.
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tocopying, recording, or otherwise without express written permission from Doble.
Doble and the Doble logo are trademarks of Doble Engineering Company.
Microsoft, Windows, and Windows 10 are registered trademarks of Microsoft Corporation in
the United States and/or other countries.
©1999-2022 Doble Engineering Company
All Rights Reserved
TP-CH1-Rev B
03/2022
Calisto™ H1 User Guide
TP-CH1-Rev B 3 03/2022
Contents
Preface 5
1. Introduction 7
2. Features 8
Sensor 8
Mechanical 8
Electrical 8
3. Electrical Interface 9
Power Supply 9
Ground 9
Data+ 9
Data- 9
RS485 Interface 9
4. Default settings 11
Calisto H1 Default Settings 11
5. Installation 12
Handling Precautions 12
6. Operation 13
Startup 13
7. Modbus 14
Exception Response 16
Modbus Command Register Definitions 19
Unit Status 26
Error Status 27
User-Defined Oil Type Configuration Window 27
Calisto™ H1 User Guide
TP-CH1-Rev B 4 03/2022
User-Defined Oil Type Name 28
Ostwald Slope, Slope (m) 28
Ostwald Offset, Offset (b) 28
Oil Type Operations 28
8. Firmware Upgrade 29
A. LEGAL NOTICE 30
Warranty 30
Equipment Limited Warranty 30
Software Limited Warranty 30
Limitations of Remedies 31
B. Modbus Address Programming 32
Calisto™ H1 User Guide Preface
TP-CH1-Rev B 5 03/2022
Preface
This guide is intended for anyone who works with Calisto H1 online hydrogen monitoring
sensor. It is assumed that the reader is familiar with professional standards and safety
practices.
This document uses two special typefaces to indicate particular kinds of information:
•Bold—Used for software controls and user-entered text, such as buttons, check
boxes, or other items that are clicked or selected. Example:
Click Close.
Also, any text you must type in is shown in this typeface. Example:
Type in 1500 ms.
•Monospace—Used for text displayed in the user interface, such as an error
message or prompt. Example:
Uploading test results.
Notes, Cautions, and Warnings
This document uses icons to draw your attention to information of special importance, as
follows.
Note: Notes provide supplemental information that may apply to only
some circumstances.
Caution: Cautions provide information that prevents damage to
hardware or data.
Warning: Warnings provide information about anything that can affect
operator health.
Calisto™ H1 User Guide Preface
TP-CH1-Rev B 6 03/2022
Support
For customer service, contact Doble.
Global Telephone: 617-926-4900
Email: [email protected]
Web: www.doble.com
Doble Engineering Company
123 Felton Street
Marlborough, MA 01752 USA
Calisto™ H1 User Guide 1. Introduction
TP-CH1-Rev B 7 03/2022
1. Introduction
The Calisto™ H1 is designed to detect and measure hydrogen as a component of
transformer oil. The hydrogen-specific solid-state sensing element is designed for ease of
use and interface flexibility. The Calisto™ H1 is an online hydrogen monitoring sensor for
distribution class transformers. The sensor provides calibrated hydrogen readings through
Modbus protocol over a 2-wire RS485 bus. The measured hydrogen is reported as ppm H2
dissolved in oil and is comparable to industry standard DGA measurements. Oil
temperature at the sensing element is measured and available through the digital
interfaces.
This document has been updated for use with firmware revision 1:18:A.
Note: Pictures of the devices that are shown throughout this guide are
representative, and may not be identical to their in practice counterparts
due to ongoing product development.
Calisto™ H1 User Guide 2. Features
TP-CH1-Rev B 8 03/2022
2. Features
Sensor
The Calisto™ H1's hydrogen measurement is based on a solid state palladium alloy sensor.
• Calibrated to measure hydrogen dissolved in transformer oil
• Periodic reference cycles are automatically run to eliminate offsets affecting long
term stability
• No maintenance, long life sensing element
Warning: The sensor element may be damaged if exposed to hydrogen
concentrations above 5,000 ppm.
Mechanical
The Calisto™ H1 is a rugged waterproof mechanical assembly design for distribution
transformer applications. A ¾”-14 NPT fitting is provided for attachment of the sensor to a
transformer. Overall dimensions are shown below.
Figure 1 Calisto™ H1
Electrical
The Calisto™ H1 uses a single M12 4-pin connector for power and communications.
• DC power input of 9 to 48 volts, 10 watts
• 2-wire RS485 for Modbus RTU communications
Calisto™ H1 User Guide 3. Electrical Interface
TP-CH1-Rev B 9 03/2022
3. Electrical Interface
All electrical connections are supplied through a 4-pin M12 connector. The key location and
pin numbers are shown below.
Figure 2 Key Location and Pin Numbers
Power Supply
Connect a DC power source rated for 9 to 48 volts, 10 watts to pin 1.
28 VDC or 48 VDC power supply is recommended.
Ground
Connect DC ground to pin 2.
Data+
Connect the RS485 Data+ signal to pin 3.
Data-
Connect the RS485 Data- signal to pin 4.
RS485 Interface
The RS485 input is isolated inside the Calisto H1 to improve noise immunity in harsh
electrical environments. The Calisto H1 does not have line biasing built into the device.
Calisto™ H1 User Guide 3. Electrical Interface
TP-CH1-Rev B 10 03/2022
When networking the device to a supervisory device, please ensure that line biasing is
provided by another device on the same network bus. A 120-ohm termination resistor,
between Data+ and Data- is installed in the Calisto H1.
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