Yokogawa DO402 Dissolved Oxygen Analyzer - Manual (Page 15)

IM 12J05D02-01E
Introduction 1-7
e. Ingold model 32 sensors with 12, 19 and 25 mm shaft
These sensors are available in many different configurations. The sensor is a polarographic sensor
and therefore settings of service code 01 has to be changed from 0 to 1.
The sensor output is normally between 30 and 100 nA in ambient air under reference conditions,
but the “large cathode” version has a current output between 200 and 700 nA. To utilize Slope
diagnostic features, it is best to read current output during first air calibration in “display” mode and
to enter that value in service code 01.
The temperature compensator is a NTC resistance and that can be chosen by entry of 3 in code 10.
The wiring of the sensor is different as well:
The red wire: the anode goes to terminal 18
The white wire: the cathode goes to terminal 17
The green/yellow wire: the shield goes to terminal 14 and the 2 black wires for NTC go to terminal
11 and 12.
The membrane checking feature cannot be used for these sensors, due to the construction of the
sensor.
1-5-2. The holders
a. PB30 floating ball holder
All Yokogawa sensors are compatible with the floating ball holder that is specified in GS12J6K4
and GS12J5A1.
b. FD30 immersion fitting
The DO30 sensor is compatible with the FD30 immersion holder as specified in GS12J6K4 and with
all flow fittings and flow fitting subassemblies that are specified in GS12D7K2.
c. DOX8HS submersion type holder
The DOX8SM and the DO30G sensor are compatible with the DOX8HS holder and all PH8 model
holders.