Hanna Instruments HI 8001, Руководство по установке, Страница: 8 / 16

8
2.2.4 Analog input connections 2.2.4 Analog input connections
2.2.4 Analog input connections 2.2.4 Analog input connections
2.2.4 Analog input connections
The pH, EC and solar radiation sensors have be connected to the analog inputs through the transmit-
ters, that have 4-20mA (source current type) outputs and 0-2V (solar radiation). The Hanna
transmitters that can be used are HI98143-22 (1 pH, 1 EC). The user can or can not use the second pH,
EC sensors or the pH input sensor. The number os EC, pH sensors is configured within panel S55 -
SENSOR CONFIG.
The EC-in sensor can be replaced from installation without modifications. Thus, the “EC-in “ input will
stay unconnected.
The transmitters will be supplied from the +/-Vs outputs. The maximum consumption supported by
the controller is around 250mA (12V). This means that two Hanna transmitters can be supplied from
the same output (2 pH channels and 2 EC channels) and one transmitter for the EC-in sensor.
The following type of sensors can be connected to the transmitters:
HI 1001 HI 1001
HI 1001 HI 1001 HI 1001 Plastic in-line pH electrode
HI 3001
HI 3001
HI 3001 HI 3001
HI 3001 4-ring conductivity probe
2.2.5 V 2.2.5 V
2.2.5 V 2.2.5 V
2.2.5 Valve connections alve connections
alve connections alve connections
alve connections
The valves have to be connected as in the following figure. Each group of 8 valves has a common pin
placed near the valve’s output called COM OUT 1, 2, 3. The valves are not supplied from the controller.