Specifications

Transmitter M300 FLOW 63
© 09 / 08 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M300 FLOW
Printed in Switzerland 52 121 319
14 Trouble Shooting
If the equipment is used in a manner not specified by these instructions, 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 selected.
– Sensor or transmitter need calibration.
– Sensor 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 defective.
Displayed is flashing.
– Setpoint is in alarm condition (setpoint exceeded).
Cannot change menu settings. – User locked out for security reasons.
14.1 Changing the Fuse
Make sure the main cable is unplugged before changing the fuse. This operation should only be
carried out by personnel familiar with the transmitter and who are qualified for such work.
If the power consumption of the M300 transmitter is too high or a manipulation leads to a short
circuit the fuse will blow. In this case remove the fuse and replace as specified in Chapter 16.
15 Accessories and Spare Parts
Description Part Number
Panel Mount Kit for ½ DIN models 52 500 213
Pipe Mount Kit for ½ DIN models 52 500 212
Configuration & Data Logger Software Kit 58 077 300
Adaptor Panel – M300 to 200/2000 cutout 58 083 300
Replacement power fuse 5x20 mm, 1 A, 250 V,
time lag, Littlefuse or Hollyland
–
Please contact your local Mettler-Toledo Sales office or representative for details on available
accessories and spare parts.