Vaisala WXT530 Series User Manual

Mode Standby PTU PT1000 Level Tipping
bucke
t
Solar
radiation
Precipitation
Continuous
rain
RS-
232
RS-485
RS-422
SDI-
21
continuous
1.5 mA +0.9 mA +0.1 mA +0.4 mA +0.1 mA +0.4 mA +0.4 mA
SDI-12 native 0.1 mA +0.9 mA
(int
erval
5 s)
+0.1 mA
(interval
5 s)
+0.4 mA
(interval
5 s)
+0.1 mA
(interval 1 s)
+0.4 mA
(interval
5 s)
+0.4 mA
(interval 5 s)
Analog
output (mA)
N/
A N/A N/A N/A N/A N/A N/A
SDI-12 native mode power save is based on measurements only when requested. Due to
SDI-12 polling mode oper
ation, only periodic wind measurement results are comparable
with other communication modes. Continuous measurement is not relevant for SDI-12
mode. Every measurement request increases power consumption for the first time
measurement. The total SDI-12 power consumption can be changed by changing
measurement request intervals.
Table 5 Economic Power Management
Measurement Consumption
Wind measurement The most consuming operation in the system, with extra variations depending on
how the wind is r
eported. If you need long time averages and measure wind
constantly, there are no large dierences between requesting periods or modes.
Fully continuous wind measurement with a 4 Hz sampling rate adds about 4.5 mA
to the standby current, depending on the wind and some other climatic conditions.
A 10-second average requested every 2 minutes consumes 8 times less. 1 Hz
sampling rate decreases it to about one fourth.
PTU measurement Adds approximately 0.9 mA to the standby consumption. Each single measurement
takes 5 sec
onds (including the warm-up period). This can be used for estimating the
average consumption of the PTU.
Continuous
precipita
tion
Adds approximately 0.4 mA to the standby consumption. A single, isolated raindrop
increases current consumption for about 10 seconds (continued, if more raindrops
are detected within the 10-second period).
ASCII RS-232 Standby
consumption
Typically 1.5 mA. The jumper wires across TX+/RX+ and TX-/RX- (only necessary in
2-wire RS-485) increase consumption slightly.
ASCII RS-232 Polling
mode and Aut
omatic
mode
Equal consumption. The Automatic mode is a little more economic, since
interpreting the poll takes more processing time than starting the Automatic
message. However, note that when selecting the Precipitation Auto-send mode, the
sub-modes M=R and M=C can cause extra consumption in rainy conditions due to
triggers for sending messages about rain incidents.
Chapter 5 – Wiring and Power Management
57
sales@streamlinemeasurement.co.uk
01457-864334
www.streamlinemeasurement.co.uk

Vaisala WXT530 Series Specifications

General

Brand	Vaisala
Model	WXT530 Series
Category	Transmitter
Language	English