KYOWA LMB-A Instruction Manual

LMB-A Small-sized Compression Load Cell INSTRUCTION MANUAL
Thank you for purchasing LMB-A Small Compression Load Cell (hereinafter referred to
as the LMB-A). Before using it, please read this instruction manual carefully. Also,
keep the manual within easy reach so that you can refer to it whenever necessary.
1. Calling the operator's attention
The following cautionary symbols and headlines are used to invite the operator's
attention. Be sure to observe the accompanying precautions in order to safeguard the
operator and preserve the performance of the instrument.
Improper handling may cause serious injury to the
Warning
operator. To avoid harm, be sure to observe the
accompanying instructions.
Improper handling may cause deleterious effects to the
Caution
operator's body. To avoid harm, be sure to observe the
accompanying instructions.
Cautions are given to invite the operator's attention, in
Caution
order to avoid instrument failure or mal-function. Be
sure to observe the accompanying instructions.
2. Safety precautions
The LMB-A is designed to detect only the load applied to the center axis. Its
installation may directly affect measurement accuracy. Therefore, carefully install
the LMB-A, thereby avoiding a slant load, lateral load, bending moment, etc.
The compensated temperature range of the LMB-A sufficiently covers daily
atmospheric temperature changes. Partial exposure to direct heat, however, must
be avoided. If not, transient output change may occur resulting in deterioration of
measuring accuracy.
If an ambient temperature unavoidably exceeds the allowable temperature range,
protect the whole LMB-A with heat insulation material in order to maintain a
temperature within the compensated temperature range.
When impacts or vibrations are applied to the direction of a load, the dynamic load
shall be static load × acceleration. If the magnitude of acceleration is not known,
rated capacity should be sufficiently large considering the dynamic load applied on
the LMB-A.
Do not disassemble the LMB-A.
Do not apply shocks to or drop matters on the LMB-A.
Calibrate the LMB-A once a year or so. (Contact KYOWA or our representative.)
Calibration is necessary whenever the LMB-A is subjected to an excessive
horizontal force component or an excessive load.
In case abnormal output value is displayed, immediately stop the measurement. If
the LMB-A is used in the system, immediately stop the system operation.
Wire the cable with a little slack not to be pulled during use.
The LMB-A is in a structure with a strain
gage bonded on the upper diaphragm as
shown in the figure below. Because the
diaphragm is very thin, carefully handle it
to avoid damage.
In vibration environment, fix the cable at its outlet and required portions. Or, the
cable may vibrate due to continuous load and cable may break and cause damage
to the LMB-A.
Make sure that the bending radius of cable is longer than 6 times of a diameter of
the cable.
3. Dimensions
LMB-A-10N to 200N
Caution
Diaphragm
LMB-A-500N to 2KN
4. Mounting･Removing
Sufficiently fix the LMB-A.
Or, it may slip when a slant or lateral load is applied.
The top of the LMB-A may collapse when excessive load is applied.
4.1 Mounting
(a) Remove grease and dirt from the mounting portion with acetone, methylene
chloride, etc. If any rust, polish with sandpaper grit 120 and the like.
(b) Apply a little drop of CC-33A as shown in the following figure and quickly spread
a thin film on the bonding portion with a match head, etc.
(c) Gently press and hold the LMB-A with fingers,
etc. Since diaphragm is very thin, hold only
its circumference with fingertips and do not
press the center and its vicinity.
(d) When using other adhesive, also observe
precautions.
4.2 Removing
When removing, insert a keen-edge cutter knife, etc. between the bottom face of
the LMB-A and the cement position.
Take care not to be hurt with the knives.
Do not forcedly insert a screwdriver to the circumference of the LMB-A bottom face
or the mount may come off.
Please use a
cutter knife to
remove.
4.3 How to use the mounting base
Attach as shown using the optional mounting base CFM.
Strain gages
Mounting method using the CFM-10B
NOTE: Cross recessed screw in the figure are included with each mounting base.
IM-T-252F 2016.8
Caution
LMB-A
Warning
Caution
○ ×
Mounting method using the CFM-16B
Hold with
Fingertips
Bonding Portion
Do not
forcedly insert
a screwdriver
or the mount
may come off.