Gill Instruments HS-50, Руководство пользователя

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Gill Instruments Ltd
Celsius
-40 0 +60
Kelvin
233.15 273.15 333.15
Channel 6 - Reserved for future expansion
This analogue output is not currently used.
Channel 7 and 8 - Analogue Inputs
Channels 7 and 8 echo the voltage on the lowest two analogue inputs that are enabled i.e. the first
two in the serial data message from the anemometer. The analogue inputs at the anemometer are in
the range ±5V. The analogue outputs have a range of ±2.5V. The voltage output is half the analogue
input value. For example an analogue input of +5V is echoed at +2.5V.
10.3 Analogue Sync. Output
A logic 1 on the Analogue Sync output indicates that the analogue outputs have settled. A logic 0 is
generated during the period when the analogue outputs are being updated (approximately 2ms
duration). The pin assignment and electrical specification of the Analogue Sync. output are
contained in Section 13.
10.4 Status Output
A logic 1 on the status output indicates that the analogue outputs are valid (i.e. the full set of
configuration data have been received from the anemometer and there are no data errors for the
current output data). The pin assignment and electrical specification of the status output are
contained in Section 13.
10.5 Test Modes
The analogue output system includes two self-test modes. They are activated by the pulling low the
relevant pin on the main 25-way connector, and remain active until the pin is pulled high or allowed
to go open circuit. The pin assignment and electrical specification are contained in Section 13.
Pulling Test Pin 1 low causes all eight analogue outputs to simultaneously cycle through the
following sequence of voltages:
-2.50v, -1.25v, 0.00v, 1.25v, 2.50v
The outputs remain at each voltage for four seconds so that the sequence repeats every twenty
seconds. Pulling Test Pin 2 low causes the same sequence of voltages to be output on each channel in
turn, while the unused channels are held at 0.00v. i.e. the sequence is first output on channel 1, then
channel 2, then 3 etc. For this test the complete sequence lasts 160 seconds.
HS-50 Research Anemometer Page 36 Issue 02
Doc. No. 1199-PS-0032 November 2004