Hach 410M Manual Básico Del Usuario página 13

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.
In addition, and to prevent any damage to the sensor electronics, the use of a purge safety backup
unit (ORBISPHERE Model 32605) is highly recommended to ensure the supply of purge gas remains
uninterrupted to the sensor in the event of a mains power outage.
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
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 13