
Transmitter M300 25
© 12 / 11 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter Multiparameter M300
Printed in Switzerland 52 121 389
4.3.3 TB3andTB4*for1/2DINand1/4DINversions–
pH/ORPSensors
pH/ORP sensors use 52 300 1XX series VP cables, or 10 001 XX02 series AS9 cables
(ORP only).
Pinno. SensorwireColor Function
1 Coax inner/transparent Glass
2 not used
3** Coax shield/red Reference
4** green/yellow, blue Solution GND/Shield
5 – not used
6 white RTD ret/GND
7 RTD sense
8 green RTD
9 – +5V
grey (no connection)
* Only on dual channel version.
Terminal 4 and 6 are internally connected, either terminal can be used to connect a wire.
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NOTE: ** Install Jumper 3 to 4 when used without Solution Ground.
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NOTE:ForsensorswithPt100temperatureprobe,thePt100adapterisrequired.
ThePt100adapterisenclosedinthepackageofeachtransmitter.
4.3.4 TB3andTB4*for1/2DINand1/4DINversions–
DissolvedOxygen/DissolvedOzoneSensors
(except58037221)
These sensors use 52 300 1XX series VP cables.
Pinno. SensorwireColor Function
1** – not used
2 Coax Shield/red Anode
3** – not used
4** green/yellow Shield/GND
5 Coax Inner/transparent Cathode
6 white, grey Temperature, Guard
7 – not used
8 green Temperature
9 – +5V
Blue wire not used.
* Only on dual channel version.
Terminal 4 and 6 are internally connected, either terminal can be used to connect a wire.
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NOTE: ** Install Jumper (supplied) 1 to 3 to 4 when using Thornton Dissolved Oxygen and
Ozone Sensors.
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