MHT410 User Guide - MHT410

Product status
Document code: M211737EN-J
Language: English
Product: MHT410
Document type: User guide

Safety
ESD protection
About this document
Documentation conventions
Regulatory statements
FCC Part 15 compliance statement
Trademarks
Product overview
Main features
Product parts and package contents
Measurement parameters and units
Oil types
Oil type information in order code
Oil-specific coefficients for ppmw moisture measurement
Data logging
Status LEDs
Installation
Planning the installation
Recommended installation locations
Mechanical installation
Electrical installation
Loop-powered display
Wiring the loop-powered display
Checklist after installation
Oil fittings check after installation
Removing the transmitter
Re-installing the transmitter in new location
Analog output
Analog output overrange behavior
Modbus
Overview of Modbus protocol support
Vaisala Industrial Protocol
Connecting to MHT410 via service port
Installing driver for the USB service cable
Connecting USB service cable
Configuring terminal application settings
Serial commands summary
Device information and status commands
Serial line output and communication commands
Measurement output commands
Measurement output format commands
Serial line communication commands
Analog output commands
Calibration and adjustment commands
Other commands
DNP3 protocol
Taking DNP3 protocol into use
Vaisala MI70 Handheld Indicator
MI70 indicator overview
MI70 indicator parts
Basic display
Graphical display
Main menu
Installing and recharging MI70 batteries
Connecting MI70 to service port
Holding and saving the display
Recording data
Starting and stopping the recording
Viewing recorded data
Clearing data memory
Comparing readings with MM70 probe
Changing the rechargeable battery pack
Vaisala Indigo520 Transmitter
Taking Indigo520 Modbus settings into use in MHT410
Connecting an MHT410 transmitter ordered using the Indigo520 order selection
Cabling and cable gland
Indigo520 and MHT410 wiring diagram
MHT410 status messages shown in Indigo520
Settings in Indigo520
Calibration and adjustment
H2 calibration and adjustment
Taking DGA sample and saving current H2 reading
Entering DGA H2 reading to transmitter
Clearing H2 calibration and adjustment
RS & T calibration and adjustment
Troubleshooting
Error states
Changing bleed screw
Technical data
Spare parts and accessories
Dimensions
Wiring diagrams
Recycling
Operating principle
Method used for measuring moisture in oil
Transformer oil
Modbus reference
Default Modbus communication settings
Function codes
Data encoding
32-bit floating point or 32-bit integer format
16-bit integer format
Register map
Modbus registers
Measurement data registers
Status registers
Device identification objects
Exception responses
Moisture ppmw calculation for transformer oils
Calculation model with average coefficients
Calculation model with oil-specific coefficients
Maintenance and calibration services
Technical support
Warranty

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