
Transmitter Cond/Res 2-Channel M300 57
© 05/07 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter Cond/Res 2-Channel M300
Printed in Switzerland 52 121 318
13 Maintenance
13.1 For Technical Support
For technical support and product information for M300 Thornton Transmitters contact:
Mettler-Toledo Thornton, Inc.
36 Middlesex Turnpike
Bedford, MA 01730
Phone: 781-301-8600 or 800-510-PURE
Fax: 781-271-0214
Or: Your local Mettler-Toledo Sales Office or representative
13.2 Front Panel Cleaning
Clean the front panel with a damp soft cloth (water only, no solvents). Gently wipe the surface
and dry with a soft cloth.
14 Troubleshooting
If the equipment is used in a manner not specified by Mettler-Toledo Thornton, Inc., the
protection provided by the equipment may be impaired.
Review the table below for possible causes of common problems:
Problem Possible Cause
Display is blank.
– No power to M300.
– Blown fuse.
– LCD display contrast set incorrectly.
– Hardware failure.
Incorrect measurement readings.
– Sensor improperly installed.
– Incorrect units multiplier entered.
– Temperature compensation incorrectly set or
disabled.
– Sensor or transmitter needs calibration.
– Sensor or patch cord defective or exceeds
recommended maximum length.
– Hardware failure.
Measurement readings not stable.
– Sensors or cables installed too close to equipment
that generates high level of electrical noise.
– Recommended cable length exceeded.
– Averaging set too low.
– Sensor or patch cord defective.
Displayed is flashing.
– Setpoint is in alarm condition
(setpoint exceeded).
Cannot change menu settings. – User locked out for security reasons.
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