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ManualsBrandsMettler Toledo ManualsConsumer electronicsM400
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Transmitter Multiparameter M400 7
© 11 / 08 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter Multiparameter M400
Printed in Switzerland 52 121 378
1 Introduction
Statement of Intended Use – The M400 Multiparameter transmitter is a single- channel online
process instrument for measuring various properties of fluids. These include Conductivity,
Dissolved Oxygen and pH / ORP. The M400 is not suitable for O
2
gas-phase measurement
applications. The M400 is available in three different levels. The level indicates the amount of
measurement parameters which can be covered. The parameters are indicated on the label on
the back of the system.
The M400 is a unique mixed mode transmitter who can handle conventional sensors (analog)
or ISM sensors (digital).
M400 parameter fit guide
Parameter Type 1 Type 2 Type 3
Analog ISM Analog ISM Analog ISM
pH / ORP • • • • • •
Conductivity • •* • •* • •*
Oxygen ppm / ppb / traces – – • / – / – • / – / – • / • / – • / • / –
Oxygen optical ppm / ppb – – – • / – – • / •
* Q1 / 2009
A large four line backlit Liquid Crystal Display conveys measuring data and setup information.
The menu structure allows the operator to modify all operational parameters by using keys on
the front panel. A menu-lockout feature, with password protection, is available to prevent the
unauthorized use of the meter. The M400 Multiparameter transmitter can be configured to use
its four analog and / or six relay outputs for process control.
The M400 Multiparameter transmitter is equipped with a USB communication interface. This
interface provides real-time data output and complete instrument configuration capabilities for
central monitoring via Personal Computer (PC).
2 Safety instructions
This manual includes safety information with the following designations and formats.
2.1 Definition of equipment and documentation symbols and
designations
WARNING: POTENTIAL FOR PERSONAL INJURY.
CAUTION: possible instrument damage or malfunction.
C
NOTE: Important operating information.
On the transmitter or in this manual text indicates: Caution and / or other possible hazard
including risk of electric shock (refer to accompanying documents)
The following is a list of general safety instructions and warnings. Failure to adhere to these
instructions can result in damage to the equipment and / or personal injury to the operator.