Gill Instruments HS-50, Руководство пользователя

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8. USING THE ANALOGUE INPUTS OF THE ANEMOMETER
Six differential analogue inputs are available of 14-bit resolution. A specification for these is given in
Section 11.6. This feature allows the user to power extra equipment local to the anemometer and to
take analogue data from that equipment. The anemometer digitises the analogue data and appends it
to the digital data string.
A sensor supply voltage is available at each connector. The voltage at this connector is the supply
voltage at the anemometer minus 1.5 volts. The sensor supply voltage is internally regulated to 21±2
volts for anemometer supply voltages above 22 volts.
For sensors with a common supply and signal ground, this ground should be connected to Sensor
Supply -. In this situation Analogue Input - should be connected to Sensor Supply - and Analogue
Ground left floating.
The
total
current drawn from the sensor supply by all the external sensors must not exceed 70mA.
Sensor connector pin out:
1 Sensor power -
2 Analogue input 1+ / 3+ / 5+
3 Analogue ground
4 Analogue input 1- / 3- / 5-
5 Analogue input 2+ / 4+ / 6+
6 Analogue input 2- / 4- / 6-
7 Sensor power +
8 Chassis/screen
HS-50 Research Anemometer Page 33 Issue 02
Doc. No. 1199-PS-0032 November 2004