Niigata seiki JLVC-30 User Manual

PRECISION MEASURING TOOLS
LONG JAW CALIPERS
Thank you for purchasing Niigata Seiki Long Jaw Calipers.
This product is a precision measurement tool with a main scale and a vernier scale to indicate the measured value.
●For safe and proper use, please read this instruction manual before use and follow the procedures described.
Please keep manual where it is accessible to user for future reference.
●Keep this manual with the instrument if transferred or leased to a third party.
●For inquiries about this product, please contact dealer or Niigata Seiki.
■PART IDENTIFICATION AND FUNCTION
⑤ Inside Meas. Surfaces
⑥ Lock Screw
④Inside Jaws
③Step Meas.
Surfaces
⑩Slide ( Vernier Scale )
①Outside Meas.
Surfaces
① Outside Meas. Surfaces
② Outside Jaws
............ ③ Step Meas. Surfaces
④ Inside Jaws
⑤ Inside Meas. Surfaces
②Outside Jaws
⑥ Lock Screw
⑦ Fine Adjust Lock
⑧ Main Scale
⑨ Fine Adjust Feed
⑩Slide ( Vernier Scale )
SAFETY PRECAUTIONS
To prevent harm to yourself or others, and to prevent damage
to property, always follow the procedures marked by the
following symbols.
WARNING
Indicates risk of personal injury or property damage if not followed.
Read the manual and follow the directions.
・Use of product other than as described in the manual
may cause accident.
Use only for measuring.
・Use for any purpose other than measuring may
damage or wear the instrument. Improper use may
also cause accident.
Use only in suitable environment.
・Do not use in locations that are humid, wet, very hot,
cold, or in direct sunlight.
・Due to large size and weight, please use care and be
aware of your surroundings during use.
CALIBRATION
●In order to maintain instrument accuracy, it is recommended that
accuracy is confirmed through calibration on a periodic basis.
Wear of measuring surfaces from repeated use may affect accuracy and
periodic accuracy checks should be performed.
JLVC - 30/JLVC - 60
User Manual
Model No.
※Model JLVC-30 shown.
⑦ Fine Adjust Lock
⑧Main Scale
⑨Fine Adjust Feed
......
Position measured object between these surfaces.
........................
Measures external dimensions. Move Slide to open and close.
Measures the height of steps.
...........................
Measures internal dimensions. Move Slide to open and close.
.........
Position surfaces inside object to be measured.
...........................
Locks the Vernier Slide.
..................
Tighten to use Fine Adjustment Feed Wheel.
※For Fine Adjustment, Loosen Lock Screw ⑥, and tighten Fine
Adjust Lock ⑦. Rotate Fine Adjust Feed wheel ⑨.
...........................
Indicates measured value in 1mm graduations.
..................
Feed screw for fine adjust of Slide.
............
Scale for measuring with a resolution of 0.05mm.
Refer to following page for usage instructions.
Please Observe
Denotes a prohibition - Denotes a requirement -
You MUST NOT do You MUST do
Handle with Care.
・Do not drop or subject instrument to excessive shock.
Do not place under heavy objects. Improper handling may
cause damage or poor accuracy.
・Do not scratch instrument, for example by writing ID number.
Jaw tips are sharp̶Handle with Care.
・Careless handling may cause injury.
Do not disassemble or modify.
・Do not remove the vernier slide, please do not attempt to
disassemble or modify as it may cause damage or poor
accuracy.
We provide calibration services.
Please contact agent in country of
purchase to make arrangements.
PREPARATION FOR USE
Before using the caliper, follow the steps below:
●Do not apply excessive force to Slide.
Moving the Slide with excessive force may cause damage and measurement error.
●Wipe off rust proofing and dirt from measuring surfaces and slide.
Contamination of surfaces may cause measurement error.
●Allow the caliper and object to be measured time to reach the same temperature.
A temperature difference between the object to be measured and the
caliper may cause measurement error. Allow enough time for the
temperatures to equilibrate.
●Performing an accuracy check.
①Jaw Alignment
In closed position, make sure the measuring surfaces on the outside
jaws align properly and there is no gap ( no light should leak past. )
②Confirm "0" points on scale ( see diagram at right )
With jaws closed as in step ① above, make sure the reading is zero and
the vernier scale graduations align at the "0" and "39" positions as shown.
READING THE SCALE
The measured value is determined by reading the main
scale, and then adding the Vernier Scale reading
determined by the position where the vernier and main
scale graduations align.
Measured Value = Main Scale Reading + Vernier Scale Reading
●EXAMPLE 1
Measured Value: 77.00mm
Main Scale
( 1mm )
Vernier Scale
( 0.05mm )
●EXAMPLE 2
Measured Value: 77.30mm
Main Scale
( 1mm )
Vernier Scale
( 0.05mm )
●EXAMPLE 3
Measured Value: 77.35mm
Main Scale
( 1mm )
Vernier Scale
( 0.05mm )
SPECIFICATIONS
●Material : Stainless Steel
Model No. JLVC-30 JLVC-60
Max Meas. Length 300mm 600mm
Length Resolution 0.05mm
±0.08mm ±0.10mm
Maximum
permissible error
Weight
1.16kg 3.29kg
※Measurements made on area of Measurement Surface
closest to the Main Scale will have the highest accuracy.
When taking measurements using the tips of the Jaws,
accuracy depends of measurement technique and may not
meet the stated accuracy specifications.
PREVENTING ERRORS
In order to prevent measurement error, please note the
following.
POSITIONING CALIPER
＜Flat surfaces＞
Position the caliper
perpendicular to the surfaces
to be measured.
＜Cylindrical surfaces＞
Position the caliper
Reading
perpendicular to the axis of
7 7
＋
the cylinder.
0.0 0
7 7. 0 0
VIEWING THE SCALE
Scale should be read from
directly above the calipers.
Due to change in height of
Reading
vernier scale relative to main
7 7
＋
scale, if viewing direction is
0.3 0
not directly above the reading
7 7. 3 0
may have parallax error.
PREVENTING DEFLECTION
Due to the large size and weight of the instrument, if not well
Reading
supported during use the body may deflect and introduce
7 7
measurement error.
＋
0.3 5
We recommend use by more than one person during
7 7. 3 5
measurement for proper support.
AFTER USE CARE・STORAGE NOTES
●Wipe slide, measuring surfaces, and exterior with
a dry cloth to remove any dirt or oil.
For rust prevention, lightly apply anti-rust oil, or place in rust
preventive bag.
●Store with Lock Screw loosened.
If stored with Lock Screw tight, expansion due to temperature
changes may cause excessive force which will cause inaccuracy.
●Store in supplied case in a cool, dry location.
Store away from moisture or direct sunlight, and out of reach
of unauthorized personnel.
Niigata seiki Co., Ltd.
5-3-14, Tsukanome, Sanjo, Niigata, Japan, 955-0055
Tel. : +81-256-33-5522 Fax. : +81-256-33-5518
MAIL intl.sales@niigataseiki.co.jp
URL http://www.niigataseiki.co.jp
Check
alignment
Jaw
Measured
Object