Sutron Accubar 5600-0120-3, Руководство по эксплуатации и обслуживанию

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Accubar SDI-12 Barometric Pressure Sensor Operations & Maintenance Manual Rev-B 30 Nov 2017 pg. 5
1 Introduction
The 5600-0120-3 ACCUBAR
®
Pressure Sensor is a solid-state pressure transducer suitable for data collection and
monitoring applications. The ACCUBAR
®
sensor has been designed with the following features to operate in a
wide range of applications:
low power
consumption standby power is 0.05 mA, average power when taking
measurements every 15 minutes via SDI-12 is less than 0.1 mA
typical.
high accuracy
0.2 mB (hPa) -3A version at 20

C
full temperature
compensation 0.3 mB accuracy (-3A) is maintained over the temperature range of
-40

to +60

C.
selectable units the sensor can be configured to output the data in mB, hPa, kPa,
"Hg, mmHg, Atm, and psi.
non-volatile setup the setup is stored in EEROM and remains even when power is
removed from the sensor
wide operating
voltage the sensor operates over the voltage range of 8 to 16 VDC
2 Quick Start
The Barometer comes prepared with a short cable to connect to your SDI-12 Data Recorder.
•
Black – Ground
•
Red – Power (8-16VDC)
•
White – SDI-12 Data
The unit comes configured from the factory at SDI-12 address 0 and ready to make barometric pressure readings
in mB (hPa). Just issue the basic SDI-
12 start measurement command “M” to address 0 ( 0M! ) and the unit will
initiate a reading of the barometric pressure. Get the data back with a “D0” command ( 0D0! ) (done
automatically by most data recorders when they are measuring) and the unit will return the barometric pressure
plus a units indicator number.
If using with other SDI-12 sensors, then the unit will need to be set to a unique address. This is done with the
change a
ddress command ( aAb! ) where “a” is current address and “b” is the new address. The unit needs to be
only SDI- 12 module on the bus at address “a” when this command is issued, or you will end up changing both
units to address “b”. For example, to change the address from the factory default of “0” to “2”, issue the
command:
0A2!
All future commands will then need to be sent to address 2.