HOBO Pendant Event Data Logger (UA-003) Manual
© 2009–2017 Onset Computer Corporation. All rights reserved. Onset, HOBO, Pendant, and HOBOware are trademarks or
registered trademarks of Onset Computer Corporation. All other trademarks are the property of their respective companies.
This product has been manufactured by Onset Computer Corporation and in compliance with Onset’s ISO 9001:2008 Quality
Management System.
Patent # 6,826,664
9831-I MAN-UA-003
Battery
The logger requires one 3-Volt CR-2032 lithium battery. Battery
life varies based on the temperature, the type of external
switch, and the frequency at which the logger is recording data
(the logging interval). A new battery typically lasts one year
with logging intervals greater than one minute. Deployments in
extremely cold or hot temperatures, or logging intervals faster
than one minute, may significantly reduce battery life.
Continuous logging at the fastest logging rate of one second will
deplete the battery in as little as two weeks.
Replacing the Battery
Before you begin:
You will need a small Philips head
screwdriver and silicone-based O-ring grease, such as Parker
Super-O-Lube, to complete these steps (no petroleum-based
lubricants). The logger should be wiped clean and dried
completely before opening it.
To replace the battery:
1. Avoid electrostatic discharge while handling the logger and
internal circuit board; ground yourself by touching an
unpainted metal surface. Hold the circuit board by its edges
and avoid touching electronics.
2.
Working on a clean, dry surface, remove the two screws
that secure the end cap to the case and remove the cap.
The circuit board is attached to the cap.
3.
Examine the desiccant pack that is tucked below the battery
holder. If the desiccant is not bright blue, put the desiccant
pack in a warm, dry place until the blue color is restored.
Or, for faster drying, the desiccant can be dried for two
hours in a 70°C (160°F) oven.
4.
Carefully push the battery out of the holder with a small,
nonmetallic blunt instrument.
5.
Insert a new battery, positive side facing up.
6.
Remove the O-ring from the end cap. Use the thumb and
fingers of one hand to hold the cap and grommet, and use
the thumb and fingers on your other hand to slide the O-
ring to form a loop as shown in photo at right. Use this loop
to roll the O-ring off the cap and over the grommet (do not
slide it over the circuit board).
7.
Inspect the O-ring for cracks or cuts and replace it if any are
detected (the O-ring is included in this logger’s replacement
parts kit).
8.
Using your fingers (not cloth or paper), spread a small dot of
silicone-based grease on the O-ring, just enough to moisten
it all the way around and making sure that the entire O-ring
surface is completely coated with grease. As you work the
grease into the O-ring, make sure there is no grit or debris
on the O-ring.
9.
Feed the O-ring over the cable and grommet on to the end
cap, making sure it is fully seated and level in the groove.
Make sure the O-ring is not pinched or twisted and that no
dirt, lint, hair, or any debris is trapped on the O-ring.
10.
Very slightly grease the inside rim of the case, especially
around the screw holes with the silicone grease, just
enough to moisten the inside edges. Make sure that there is
no excess lubricant that could get onto the logger
electronics or label. Make sure there is no debris on this
surface.
11.
Return the circuit board, desiccant pack, and label to the
case, carefully aligning the circuit board with the grooves in
the case so that the battery faces the ridged side of the
case.
12.
Carefully push the end cap into the lubricated case until the
screw holes are aligned. Visually check that the O-ring forms
a uniform seal all around.
13.
Re-fasten the screws. Tighten the screws until you feel
them hit the bottom of the screw holes, but not so tight
that they distort the clear housing.
14.
Make sure the grommet is still tight. If loose, hand-tighten it
and then tighten an additional half-turn with a 15 mm
wrench.
WARNING:
Do not cut open, incinerate, heat above 85°C
(185°F), or recharge the lithium battery. The battery may
explode if the logger is exposed to extreme heat or conditions
that could damage or destroy the battery case. Do not dispose
of the logger or battery in fire. Do not expose the contents of
the battery to water. Dispose of the battery according to local
regulations for lithium batteries.
O-ring on end cap
Logger case
Circuit board
Battery
Desiccant
Grommet
Shop for Data Logging products online at:
www.
DataLoggerStore
.ca
1.800.561.8187
