Xylem 4046 ANALOG TO SDI-12 CONVERTER - Manual

Model 4046 SDI Sensor
Instruction Manual 60-0004046-00
1.0 INTRODUCTION
1.1. General Description:
The model 4046 SDI Sensor provides an interface to convert inputs from two
(2) analog sensors and one (1) tipping bucket to an SDI serial data interface.
The 4046 also provides internal measurements of battery voltage and
ambient temperature.
1.2. Specifications:
Size 3.5”LX0.75”WX2.1”H
Weight 1.9 oz.
Operating Temperature -30-60Degrees Centigrade
Power requirements 12 VDC
<200 uA during sleep
<1 A for sensor power
Mounting: Din Rail
Connections: Screw Terminal
Wire Size #24-#14 AWG
Inputs: Gnd, + 12VDC, (2) Analog 0- 5VDC
Tipping Bucket (contact closure to ground
Communication: SDI -12 (version1.1 compliant)
Sensor Power: 12VDC or 5.00VDC (jumper selectable)
2.0 OPERATION
The 4046 responds to all basic SDI commands. The sensor power is switched
on after successfully decoding a “Start Measurement” command and switched off at
the completion of the measurement. The duration (sensor warm-up time is
programmable using SDI commands. The 4046 will go into low power sleep state
when it is not being polled. User values for Slope (multiplier) and Offset (adder) are
programmable for both analog channels and tipping bucket. The tipping accumulator
can be set to zero by SDI command.