Instruction Manual
Alpha DO 500
6
2.3.2 Connecting Dissolved Oxygen Electrode
Refer the instruction sheet that comes with your Dissolve Oxygen electrode
to identify polarity (+ve and –ve) of DO wires.
1. Connect DO +ve wire to
Pin 1
of SL1 connector
2. Connect DO -ve wire to
Pin 2
of SL1 connector
2.3.3 Connecting Temperature Probe
For Automatic Temperature Compensated (ATC) readings, a 100
:
Pt RTD
temperature probe (2-wire or 3-wire) can be connected to the Transmitter.
3-Wire Probe:
1. Connect PT100 compensate wire to
Pin 5
of SL1 connector
2. Connect PT100 sense wire to
Pin 6
of SL1 connector
3. Connect PT100 GND wire to
Pin 7
of SL1 connector
2-Wire Probe:
1. Short
Pin 5 & 6
of SL1 connector using a small piece of wire.
2. Connect PT100 sense wire to
Pin 6
of SL1 connector
3. Connect PT100 GND wire to
Pin 7
of SL1 connector
