14 Technical Data
Measuring ranges
St USGS specification version
0 … 15 m or 0 … 1500 mbar
0 … 50 ft or 0 … 25 psi
30 m measuring range version
0 … 30 m or 0 … 3000 mbar
0 … 100 ft or 0 … 50 psi
Resolution
1 mm or 0.1 mbar
0.01 ft or 0.001 psi
Accuracy SDI-12 interface
St 30 m measuring range version
±5 mm
±0.02 ft
USGS specification version
measuring range 0 … 15 ft: ±0.01 ft
measuring range 15 … 50 ft: ±0.065 % of measured value or
±0.02 ft, whichever is less
Accuracy 4 … 20 mA interface
±0.1 % FS; TC 10 ppm/°C (at 20 °C)
Measuring dynamics (max. level change)
1 m/min
Units
m or ft; bar or PSI
Interfaces
4 … 20 mA, SDI-12, SDI-12 via RS-485
Power supply
10 … 30 V DC, typ. 12/24 V DC
Current consumption
Query interval 1 min
typ. 320 mAh / day (max. 3 700 mAh / day)
Query interval 15 min
typ. 25 mAh / day (max. 300 mAh / day)
Dimensions L x W x H
165 mm x 205 mm x 115 mm
operating/display elements
DIP switches
setting operating parameters (eight)
Pump membrane button
Call purge function; display error status using LED
Status LED
Display operating state/error status
Weight
approx. 1,500 g
Housing material
ABS
Type of protection
IP 43
Temperature range
Operation
–20 … +60 °C
Storage
–40 … +85 °C
Relative humidity
10 … 95 % not condensing
Measuring tube
internal diameter
Connection possibilities for 2 mm, 4 mm, 1/8"
Length
2 mm, 1/8": max. 100 m
4 mm: max. 75 m
EMC limits
Resistance to electrostatic discharge (ESD)
complies with EN 61000-4-2 degree of severity 2
(4 kV contact discharge)
Resistance to electromagnetic fields
complies with EN 61000-4-3 degree of severity 3 (3 V/m)
Resistance to transient fields (burst)
complies with EN 61000-4-4 degree of severity 5 (4 kV)
Resistance to surge
complies with EN 61000-4-5 degree of severity 5 (4 kV)
Line-borne and radiated interference
complies with EN 55022 Class B (30 … 1000 MHz)
27