HOBO U30 Station (NRC) User’s Guide
59
HOBO U30 Station
lights provide basic diagnostics
Logging Interval
1 second to 18 hours, user-specified
interval
Battery Type
4 Volt, 4.5 AHr or
10 AHr, Rechargeable sealed lead-acid
Rechargeable Battery
Service Life
Typical 3–5 years depending upon
conditions of use. Operation within the
extended operating range (but outside the
normal range) will reduce battery service
life.
Time Accuracy
0 to 2 seconds for the first data point and
±5 seconds per week at 25°C (77°F)
Environmental Rating
Weatherproof enclosure, tested to NEMA
6. (Requires proper installation of cable
channel system).
Mounting
3.8 cm (1.5 inch) mast or wall mount
Enclosure Access
Hinged door secured by two latches with
eyelets for securing with user-supplied
padlocks
Sensor Network Cable
Length
100 m (328 ft) maximum
External Power
External power is required. The system
optionally accepts the following Onset
solar panels (see the next section):
SOLAR-1.2W
SOLAR-3W
SOLAR-6W
Alternatively it accepts an AC power
adapter:
AC-U30
Specification
Approval pending
60
HOBO U30 Station (NRC) User’s Guide
Optional Analog Sensor Port Specifications
Input Channels
Two, single-ended
Field Wiring
Two- or three-wire via screw terminals on
detachable connector, 16–24 AWG.
Replacement detachable connectors: Part
of spares kit, Part No. A-FS-CVIA-7P-1
Input Range
User-configurable: 0–20 mA DC, 0–20
VDC (suitable for 2.5, 5, 10V sensors)
Minimum / Maximum
Input Voltage
0 / 24 VDC
Minimum / Maximum
Input Current
0 / 24 mA DC
Minimum Current Source
Impedance
> 20 K
Ω
Accuracy
± 0.25% of FSR from 50mV to FSV
ADC Resolution
12 bits
Excitation Power
Switched 12 VDC, up to 50 mA; user-
selectable warm-up from 5msec to 2
minutes.
