Table 23 PTU Parameters Bits 1-8
Bit Description
1st bit (most left) Pa Air pressure
2nd bit Ta Air temperature
3rd bit
Tp Internal temperature
1)
4th bit Ua Air humidity
5th bit spare
6th bit spare
7th bit spare
8th bit spare
& delimiter
1) Tp temperature value is used in pressure calculation, it does not express the air temperature.
Bits 9-16 determine the PTU parameters included in the composite data message obtained
with the following commands:
• ASCII: aR0 and ar0
• NMEA 0183:aR0, ar0
• SDI-12: aM, aMC, aC, and aCC
• SDI-12 continuous: aR and aRC
Table 24 PTU Parameters Bits 9-16
Bit Description
9th bit Pa Air pressure
10th bit Ta Air temperature
11th bit Tp Internal temperature1
12th bit Ua Air humidity
13th bit spare
14th bit spare
15th bit spare
16th bit spare
Parameter Description
[I]
Update interval: 1 … 3600 seconds
[P]
Pressure unit: H = hPa, P = Pascal, B = bar, M = mmHg,
I = inHg
WXT530 Series User Guide M211840EN-D
124
sales@streamlinemeasurement.co.uk
www.streamlinemeasurement.co.uk
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