D01392701A
Z
Strain gauge load cell Instructions for Use
TU-BR-G
Tension/Compression
Load Cell
Introduction
Thank you for purchasing the TU-BR-G load cell.
Please read this document completely before using this
load cell to achieve its best performance and ensure safe
and proper operation.
Included accessories
If anything is missing or damaged, contact the retailer
where you purchased the product.
Test report × 1
Instructions for Use (this document) × 1
o
Company names and product names in this document are the
trademarks or registered trademarks of their respective owners.
IMPORTANT SAFETY INSTRUCTIONS
V
WARNING
If something abnormal occurs
Request repair from the retailer where you purchased
the product.
Do not open the cover.
Never remove the cover from this unit. Doing so could
cause malfunction. Request inspection and repair from the
retailer where you purchased the product. Do not alter this
unit. Doing so could cause malfunction.
Do not put foreign objects or water, for example,
into the unit.
Do not place a container that holds water, for example, on
top of this unit. If liquid is spilled, for example, and enters
the unit, this could cause malfunction.
Do not use the unit with any power supply voltage
other than that specified.
Do not use the unit with any power supply voltage other
than that specified. Doing so could cause malfunction.
V
CAUTION
Unsuitable installation locations
Do not place the unit in the following types of locations.
Doing so could cause malfunction.
o
Locations where it might be exposed to smoke or steam,
such as near a kitchen table or humidifier
o
Unstable locations, including unsteady stands and
tilted places
o
Locations that are very humid or dusty
o
Locations that are exposed to direct sunlight
When not using the unit for a long time
For safety, cut the power supply when not using this unit
for a long time.
Do not operate a damaged unit.
Precautions for use
o
This unit is not built to be water or splash resistant,
and it cannot be used in conditions when the relative
humidity is high. Moreover, use in atmospheres with
corrosive gases should be avoided.
o
Be careful to prevent water, oil and other substances
from getting on the unit.
o
Avoid use in conditions where condensation could occur.
o
Connect cores to the load cell after discharging (elim-
inating) static electricity from your body.
o
If the surrounding temperature changes suddenly, the
values output by this device could become unstable,
making accurate measurement impossible.
(This could occur, for example, in a location blown by
warm or cold air.)
o
Conduct load calibrations periodically.
Installation procedures
o
To use load buttons, screws, bolts and rod ends, for
example, with this load cell, attach them to the screw
holes in its top and bottom.
c
c
3
Rod end use example
Load button use example
Tensile load (+ output)
Compression load
(– output)
Sensor
part
Top
threaded part
Bottom
threaded part
Base plate
ATTENTION
When attaching a rod end or load button to the top
screw hole, hold the top threaded part (shown with
diagonal lines) and tighten the screw/bolt and nut.
In the same way, when attaching a rod end or base to the
bottom screw hole, hold the bottom threaded part (shown
with diagonal lines) and tighten the screw/bolt and nut.
When tightening the screw or nut, holding the threaded
part on the opposite end will cause twisting force to
be applied to the sensor and damage the load cell.
o
There is a gap between the load cell and its cover.
Measurement errors could occur if foreign materials enter
this space or if the cover becomes deformed causing it
to contact the load cell. If this should happen, remove
the foreign material or fix the deformation.
Cover
Cable
Cover attach-
ment area
Do not remove
this
Detection
(sensor) part
o
Do not screw the threaded parts of load buttons, bolts
and rod ends, for example, into the load cell deeper than
the screw hole depth indicated in the table with the
dimensional drawing of the specifications. For example,
if the load cell has a 2kN rating, do not screw anything
in more than 16 mm. Screwing anything in more than
this will damage the sensor part.
o
When using a rod end or other tension jig, hold the
attachment areas shown with diagonal lines in the
same way as with compression so that twisting force
is not applied to the sensor part.
o
When using with tension, consider the detent of all
the screws, and conduct inspections before starting
work, for example.
o
Consider examinations to prevent accidents caused
by falling objects due to damaged load cells resulting
from overloads and unbalanced loads, for example.
o
The screw dimensions are shown in the table below.
Rated capacity
Screw size
Tightening torque
200 N
M6x1
5.07 N·m
500 N
1 kN
2 kN
M12x1.75
76.5 N·m
5 kN
10 kN
20 kN
M16x2
190
Use class 12.9 strength screws.
o
Since this load cell is made with aluminum material
(200N, 500N, 1kN and 2kN), we recommend using flat
washers suitable for the screws and bolts being used.
Precautions when placing loads on the unit
o
Make sure the load is applied perpendicularly to the
length of the load cell. Make sure that the load is also
applied in alignment with the load-receiving hole. If
the load is not centered (eccentric load), twisting, for
example, and measurement errors could occur. This
could even result in damage.
F1
F3
F2
F4
F
F
F is the correct load
orientation
F1 and F3 are eccentric
angular loads
F2 and F4 are eccentric
loads
o
Be careful to avoid turning and twisting from lateral
loads. This could cause troubles like those described
in the previous item.
o
Be careful to avoid applying loads that exceed the
rated capacity. In particular, use caution when there are
vibrations because loads that exceed the rated capacity
could occur due to sympathetic vibrations, for example.
Continued on the next page
e
