Centech 59492 User manual

Manual Revised 11f
Visit our website at: http://www.harborfreight.com
Email our technical support at: [email protected]
Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual near the assembly diagram (or month and year of purchase if product has no number).
Keep this manual and the receipt in a safe and dry place for future reference. 22a
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright©2021 by Harbor Freight Tools®. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in
any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.

Page 2 For technical questions, please call 1-888-866-5797. Item 59492
Important Safety Information
1. Do not exceed Scale’s 110 LB./
1760 OZ. / 50,000 G / 50 kg
max. weight capacity. An “ERR”
will appear on digital display
if scale is overloaded.
2. Do not expose scale to vibration,
extreme temperatures or moisture.
3. Do not mix old and new
batteries. Do not mix alkaline,
standard (carbon-zinc), or
rechargeable (nickel-cadmium)
batteries. Position batteries
in proper polarity. Do not use
swollen or leaking batteries.
4. This product is not a toy.
Do not allow children to play
with or near this item.
5. Weight readings are for
household use only. Do not
use for commerce or trade.
6. Inspect before every use; do not
use if parts are loose or damaged.

Page 3For technical questions, please call 1-888-866-5797.Item 59492
Specifications
Max. Tray
Capacity 110 LB. / 50kg.
Measurements Pounds/Ounces, Ounces,
Grams/Kilograms
Shut-Off 90-second auto shut-off
(when using batteries)
Battery/AC
Adapter
4 “AAA” Batteries (included)
AC Adapter (included)
Scale Accuracy 0.1 oz.
NOTE: Do not use scale for commerce or trade.m
Functions
a
b
c
d
e
f
a. POWER - turn the
Scale on or off.
b. TARE - reset the LCD to 0.0.
c. MODE - change the
measuring unit.
d. HOLD - lock the weight.
e. Accuracy to 0.1 ounce.
f. Maximum weight - 110 lbs.

Page 4 For technical questions, please call 1-888-866-5797. Item 59492
Operating Instructions
Read the ENTIRE IMPORTANT SAFETY INFORMATION section
at the beginning of this document including all text under
subheadings therein before set up or use of
this product.
Installing/Replacing Batteries
1. Remove battery compartment
cover from digital display unit.
2. Insert batteries into battery
compartment. Position
batteries in proper polarity.
3. Replace battery
compartment cover.
Using Adapter
1. Connect the cord to the
display unit and the scale.
2. Connect the USB-C power
cable to the display unit and
to the receptacle located at
the rear of the Scale.
3. Plug the Adapter into
120VAC grounded outlet.
Using Batteries
1. Connect the cord to the
display unit and the scale.

Page 5For technical questions, please call 1-888-866-5797.Item 59492
Operation
1. Plug the supplied cable into
display unit and rear of scale.
2. Put the scale on a flat level surface
before weighing any items.
3. Press the POWER button once.
When “0” appears on the display,
the Scale is ready for weighing.
4. If the number shown is not
“0” before weighing, press
TARE button to reset to “0”.
NOTE: The default unit is lb./oz.
5. Press MODE
to select the measuring unit.
NOTE: The scale will automatically
switch to kg when the weight
is larger than 1000g.
6. Gently place item to be weighed
in the middle of platform. The
weight will appear on the display.
NOTE: “ERR” will appear on
display if scale is overloaded and
will power off after 10 seconds.
NOTE: Units are automatically
saved after powering off.
Hold Button
1. Press HOLD button to lock
the weight. The LED will show
“hold” in the upper left corner.
2. Press HOLD again to unlock
or it will automatically unlock
after 60 seconds.
3. To turn off Scale, press POWER
button. If using batteries, the scale
will turn off in 90 seconds
if there is no operation.
Tare Button
1. To weigh item in a container,
place container on Scale
and press TARE button.
2. Add item to container.

Page 6 For technical questions, please call 1-888-866-5797. Item 59492
CalibrationN is required.lace the Scale on a flat and stable surface.
1. Place the Scale on a flat
and stable surface.
2. Press and hold the MODE and
POWER buttons until random
numbers are on the display.
3. Press POWER button again,
the screen will display “2Ero”.
4. Press MODE button to choose
the weight of calibration
weight. Default is 5 lb. Press
TARE and HOLD buttons to
adjust weight of calibration
weight, if different than 5 lb.
5. Place the 5 lb. Calibration Weight
on the center of the platform.
6. Wait until “CAL” and
“PASS” are displayed.
7. If calibration is successful, the
scale will return to Weighing Mode.
Note: If calibration is unsuccessful,
repeat calibration process or have
qualified technician calibrate scale.
Note: Do Not turn Scale off
during the Calibration process.

Page 7For technical questions, please call 1-888-866-5797.Item 59492
Troubleshooting
Problem Possible Causes Likely Solutions
Display flashes
battery symbol in
lower left corner.
Batteries are low. Replace batteries
Display flashes “LO”. Batteries are low. Replace batteries or use
adapter to ensure accuracy.
Display doesn’t
respond to controls.
Circuit needs to be reset. Remove batteries, wait 30
seconds, replace batteries
and turn scale “ON”.
Display does
not show.
Battery has poor connection
or battery voltage is too low.
Take batteries out and
adjust connections.
Replace batteries as
necessary or use Adapter.
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Replacement parts are not available for this item.
Note: Reference UPC 193175472748.

26677 Agoura Road • Calabasas, CA 91302 • 1-888-866-5797
Limited 90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure that its products meet high
quality and durability standards, and warrants to the original purchaser that this
product is free from defects in materials and workmanship for the period of 90 days
from the date of purchase. This warranty does not apply to damage due directly or
indirectly, to misuse, abuse, negligence or accidents, repairs or alterations outside
our facilities, criminal activity, improper installation, normal wear and tear, or to lack of
maintenance. We shall in no event be liable for death, injuries to persons or property,
or for incidental, contingent, special or consequential damages arising from the use
of our product. Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation of exclusion may not apply to you.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS
OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us
with transportation charges prepaid. Proof of purchase date and an explanation
of the complaint must accompany the merchandise. If our inspection verifies
the defect, we will either repair or replace the product at our election or we may
elect to refund the purchase price if we cannot readily and quickly provide you
with a replacement. We will return repaired products at our expense, but if we
determine there is no defect, or that the defect resulted from causes not within the
scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also
have other rights which vary from state to state.