HOBO U30 Ethernet Data Logger

Normal operating range: -20°C to 40°C (-4°F to 104°F)

Extended operating range: -40 to 60°C (-40 to 140°F) - see "Rechargeable Battery service Life" for impact of operations in Extended Operating Range.

Sensor Inputs: 5 standard; option to expand to 10

Smart Sensor Compatibility: Compatible with most Onset smart sensors

Data Channels: Maximum of 15 (some sensors use more than one data channel)

Alarm Output Relay: Can be configured to be activated, deactivated or pulsed on user-defined sensor alarms. The relay can be configured as normally open or normally closed, and is rated for 30 V and 1 amp max.

Expansion Slot: One expansion slot is available for factory-installed expansion port.

Local Communication: Full Speed USB via USB mini-B connector

Size: 17.8 H x 11.7 D x 19.3 W cm (7.0 H x 4 .6 D x 7.6 W inches)

Weight: 2 kg (4 lbs 10 oz)

Materials: Outer Enclosure: Polycarbonate/PBT blend with stainless steel hinge pins and brass inserts
Inner Enclosure: Polycarbonate with brass inserts
U-Bolts: Steel with zinc dichromate finish
Gaskets: Silicone rubber
Cable entry channel: EPDM rubber
Cable entry bars: Aluminum with ABS plastic thumb screws

Data Storage Memory: Nonvolatile flash data storage, 512K bytes local storage

Memory Modes: Stop when full, wrap around when full

Operational Indicators: Up to seven (depending upon options) status lights provide basic diagnostics

Logging Interval: 1 second to 18 hours, user-specified interval

Battery Type: 4 Volt, 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

Alarm Notification Latency: Logging interval plus 2–4 minutes (typical). Onset is not responsible for failed connections or undelivered mail/text messages.

Alarm Output Relay: One relay contact closure can be configured as normally open, normally closed, or pulsed.
Voltage: t30 V Current: 1 amp max.

Sensor Network Cable Length: 100 m (328 ft) maximum

External Power: External power is required. The system optionally accepts the following Onset solar panels:

• SOLAR-1.2W
• SOLAR-3W
• SOLAR-6W

Alternatively it accepts an AC power adapter:

• AC-U30

Ethernet:

Interface: Ethernet 10Base-T or 100Base-TX (Using external RJ45 Jack)

Encryption: 256-bit AES Rijndael encryption

RJ 45 Jacks: 1

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, 0-2.5 VDC, 0-5 VDC, 0-10 VDC, or 0–20 VDC
Minimum / Maximum Input Voltage: 0 / 24 VDC
Minimum / Maximum Input Current: 0 / 24 mA DC
Minimum Current Source Impedance: > 20 KΩ
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