Hach ORBISPHERE 410 Manual Básico Del Usuario página 15

Connector J8 (sensor)
The numbers listed below refer to the 10 available J8 connections (from left to right) in
The colors indicated are the wire colors in the sensor cable.
Note: Remember, this connector is colored orange for EC sensors and black for TC sensors.
A1100 EC sensor
1. Guard electrode
2. RS485A+
3. Thermistor A
4. Anode electrode
5. RS485B
6. Thermistor B
7. GND
8. + 5V
9. Cathode electrode
10. Not used
4.7.5 Measurement alarm relays
The three output relays are located on the measurement board.
They can be individually configured to Normally Open (NO) or to Normally Closed (NC) by
physically moving the jumper on each relay. The illustration is for the EC measurement
board (the positions are different for the TC measurement board):
• Upper relay is set to NC
• Middle relay is set to NO
• Lower relay is shown with no jumper
Note: For all measurement boards, J4 is relay 1, J5 is relay 2 and J6 is relay 3
4.8 Sensor installation
4.8.1 EC sensors
For EC sensor installation, servicing, and maintenance ensure you follow the instructions in the
Sensor Installation and Maintenance manual that was supplied with the instrument.
4.8.2 TC sensors
For TC sensor installation, servicing and maintenance ensure you follow the instructions in the TC
Sensor Installation and Maintenance manual that was supplied with the instrument. Pay particular
attention to the installation and connection of the purge gas supply.
Do not place the TC sensor into a liquid sample until a constant supply of dry purge gas has been connected, as
liquid could condense inside the measuring chamber and cause damage to the thermal conductor chip.
To ensure the continuation of purge gas while the sensor is in contact with the sample, it is highly
recommended to use a backup purge gas cylinder with an automatic changeover valve that activates
when the first cylinder is empty.
The use of an ORBISPHERE Model 29089 gas regulator (or similar) is also recommended to deliver
a constant, pressure regulated supply of dry purge gas to the sensor, filtered to 40 μm.
31xxx EC sensor 31xxxS smart EC
sensor
Guard electrode Guard electrode
Not used I2C-SCL
Thermistor A Thermistor A
Anode electrode Anode electrode
Not used I2C-SDA
Thermistor B Thermistor B
Not used GND
Not used + 5V
Cathode electrode Cathode electrode
Not used Not used
N O T I C E
Figure
TC sensor Sensor
cable
GND for power Yellow
V2 signal Pink
Solenoid Grey
Relay coil Red
+12V power Purple
+24V power White
V3 signal Black
GND for signal Green
-5V power Blue
Temperature Brown
English 15
15.