HOBO® 4-Channel Pulse Input
Data Logger (UX120-017x) Manual
14638-E
The HOBO 4-Channel Pulse Input data logger records electronic pulses and mechanical or
electrical contact closures from external sensing devices. Using HOBOware®, you can easily
configure each of its four channels to monitor and record pulse, event, state, or runtime data in
a wide variety of applications, including tracking building energy consumption, monitoring
mechanical equipment, and recording water and gas flow rates. Plus, when combined with the
E50B2 Energy & Power Meter (T-VER-E50B2), this logger provides extensive power and energy
monitoring capabilities. There are two models of the HOBO 4-Channel Pulse Input data logger:
the UX120-017 stores more than 500,000 measurements while the UX120-017M holds more
than 4,000,000 measurements.
Specifications
Inputs
External Contact Input
Electronic solid state switch closure or logic driven digital signals to
24 V
Maximum Pulse Frequency
120 Hz
Maximum State, Event,
Runtime Frequency
1 Hz
Bits
4–32 bits depending on pulse rate and logging interval
Maximum Pulses Per
Interval
7,863,960 (using maximum logging rate)
Driven Logic Signal
Input Low:
≤
0.4 V; Input High: 3 to 24 V
Absolute Maximum Rating
Maximum Voltage: 25 V DC
Minimum Voltage: -0.3 V DC
Solid State Switch Closure
Input Low: < 10 K
Ω
; Input High: > 500 K
Ω
Internal Weak Pull-Up
100 K
Ω
Input Impedance
Solid state switch closure: 100 K
Ω
pull up; Driven signal: 4.5 K
Ω
Minimum Pulse Width
Contact closure duration: 500 uS; Driven logic signal: 100 uS
Lockout Time
0 to 1 second in 100 ms steps
Edge Detection
Falling edge, Schmitt Trigger buffer
Preferred Switch State
Normally open or Logic “1” state
Logging
Resolution
Pulse: 1 pulse, Runtime: 1 second, State and Event: 1 State or Event
Logging Rate
1 second to 18 hours, 12 minutes, 15 seconds
Time Accuracy
±1 minute per month at 25°C (77°F) (see Plot A on next page)
Battery Life
1 year, typical with logging intervals greater than 1 minute and
normally open contacts
Battery Type
Two AA alkaline or lithium batteries
Memory
Memory
UX120-017: 520,192 measurements (assumes 8-bit)
UX120-017M: 4,124,672 measurements (assumes 8-bit)
Download Type
USB 2.0 interface
Download Time
30 seconds for UX120-017, 1.5 minutes for UX120-017M
Physical
Operating Range
Logging: -40° to 70°C (-40° to 158°F); 0 to 95% RH (non-condensing)
Launch/Readout: 0° to 50°C (32° to 122°F) per USB specification
Weight
149 g (5.26 oz)
Size
11.4 x 6.3 x 3.3 cm (4.5 x 2.5 x 1.3 inches)
Environmental Rating
IP50
The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU).
HOBO 4-Channel Pulse
Input Data Logger
Models: UX120-017
UX120-017M
Included Items:
•
4 Mounting screws
•
2 Magnets
•
Hook & loop tape
•
4 Terminal block connectors
Required Items:
•
HOBOware Pro 3.2 or later
•
USB cable (included with
software)
Accessories:
•
Additional terminal blocks
(A-UX120-TERM-BLOCK)
•
Lithium batteries (HWSB-LI)
