Connection of Auxiliary probes

The auxiliary sockets are mounted under the station cross arm. They are used to connect optional sensors. The Weather-Pro Weather Station has one pulse input and one analog input. The Weather-Pro PLUS Weather Station has one pulse input and three analog inputs.

The following Weather-Pro sensors are available:

Pulse Output Sensors

• a tipping bucket rain gauge (normally supplied with 6 metre cable)

Analog Output Sensors

• ground temperature probe (normally supplied with 4 metre cable)
• leaf wetness sensor (normally supplied with 6 metre cable)
• water level probe (normally supplied with 10 metre cable)
• soil moisture tension probe (normally supplied with 4 metre cable)
• external humidity probe (normally supplied with 4 metre cable)
• external pressure probe (normally supplied with 6 metre cable)

These optional sensors are available from your Weather-Pro agent. These will be supplied with the auxiliary plug already connected. If you require a different length of cable than that specified for the sensor please discuss this with your Weather-Pro agent.

The Weather-Pro tipping bucket rain gauge is fitted with an analog auxiliary input socket to allow for the connection of an analog output sensor. If you require both the tipping bucket rain gauge and an analog output sensor to be connected to the auxiliary socket on the cross arm, discuss this with your Weather-Pro agent before ordering.

To connect analog sensors to the auxiliary input you will require a 3 pin male Switchcraft plug EN3C3M (Farnell part number 727-003). These can also be obtained from your Weather-Pro agent.

The Analog Auxiliary Input pin out is as follows:

1. Switched Power (3 volts at 2mA max used to energize sensors for 30ms before a reading is taken)
2. Analog Input (0 to 3 volts)
3. Ground (the common return for the Analog input)

To connect pulse output sensors to the auxiliary input you will require a 2 pin male Switchcraft plug EN3C2M (Farnell part number 726-990). These can also be obtained from your Weather-Pro agent.

The Pulse Auxiliary Input pin out is as follows:

1. Slow Pulse input (usually used for tipping bucket rain gauge. Accepts a maximum pulse rate of up to 5 pulses per second with a minimum pulse duration of 1ms)
2. Ground (the common return for the Slow Pulse input)