D01337101B
Z
Strain gauge load cell Instructions for Use
TU-QR(T)-G3
Tension/Compression Load Cell
Introduction
Thank you for purchasing the TU-QR(T)-G3 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
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Unstable locations, including unsteady stands and
tilted places
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Locations that are very humid or dusty
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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
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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.
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Be careful to prevent water, oil and other substances
from getting on the unit.
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When there is a tensile load, be careful not to apply
bending loads or twisting.
When using with a tensile load, we recommend a rod end.
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Be careful to avoid applying loads that exceed the
rated capacity.
If using in a location with vibrations, consider resonance
phenomena and other factors when choosing the
rated capacity.
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Avoid use in conditions where condensation could occur.
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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
If a cable of this unit needs to be bent and shifted, make
the curvature of the bent part at least 50 mm. Do not
apply tension to the cable.
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Conduct load calibrations periodically.
Installation procedures
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When using with a tensile load, attach a rod end.
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When attaching a rod end to a load cell, use a nut to
prevent loosening.
Use a wrench (12mm width across flat) when tight-
ening the nut.
(Caution: When tightening the nut, be careful not to
apply a twisting load (momentum) to the load cell itself.
Doing so could cause damage, for example.)
o
After connecting a rod end, screw in and tighten hexagon
socket set screws into the two M3 screw holes on both
sides of the load cell to prevent rotation.
During inspection before use, confirm that the M3 screws
are not loose and that there are no signs of turning.
o
After installing a load cell, confirm that the cable will
not be pulled. Pulling on the cable could result in error.
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Verify that safety measures to prevent falling and drop-
ping have been implemented.
With tensile load
Nut
Hold the rod end in place
Wrench
With tensile load, install
the diaphragm side down
(recommended)
M3 screw holes for hexagon socket set screws in
two locations to stop rotation and prevent falling.
F
Tensile load
With compression load
If the load receiving area is contacted by something that
is at a different temperature and the load is increased,
the values output by this device could become unstable,
making accurate measurement impossible.
In such a case, wait until the temperature difference ceases
to exist before measuring.
Compression load
F
With compression load,
install the diaphragm side up
(recommended)
Electrical connection of load cell with
built-in TEDS
o
Connect as shown in the illustration below. Incorrect
connections could result in inability to balance and
in errors occurring in the output voltage when loads
are applied.
Using a cable with bare lead wires
Red
Input (+)
Black
Output (−)
Blue
Input (−)
White Output (+)
Orange TEDS signal (+)
Green TEDS signal (COM)
Yellow Shield
TEDS
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This unit has a built-in TEDS function.
The orange and green cores in the cable and the F and
G pins in the connector are wired for TEDS.
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This unit does not support remote sense.
See the operation manuals of indicators and strain
amps that support remote sense for how to connect
sensors with those units.
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The shield is not connected to the main body of this
product. For this reason, if grounding is necessary
because of external noise or another issue, arrange to
ground the shield to a part other than the body of this
unit, for example.
o
Since the cable is directly connected to this unit, use
a specialized cable to increase the length. (Please
consult with us.)
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When conducting insulation resistance tests, limit them
to the red, black, blue and white cores. Do not apply to
the TEDS cores (orange and green).
