Lafayette Instrument J00105 User manual

Model J00105 User Instructions
www.lafayetteinstrument.com . [email protected]
Model J00105
Lafayette Hydraulic
Hand Dynamometer
User Instructions
3700 Sagamore Parkway North
Lafayette, IN 47904 USA
Tel: [phone]
[email protected]
www.lafayetteinstrument.com
© 2022 by Lafayette Instrument Company, Inc. All Rights Reserved- Rel. 2.8.22
MAN32261

Lafayette Hydraulic Hand Dynamometer
3700 Sagamore Parkway North Lafayette, IN 47904 . Phone: [phone]
Table of Contents
Description 2
Benets 3
Operation 4
Service Tips 5
Table: Average Grip Strength vs Age 7
References 8
Warranty 8
CE-Declaration of Conformity 9
Symbol Glossary 10
Description
The Lafayette Hand Dynamometer oers many features for both routine screening work and for
evaluating hand trauma and disease.
Dual-Scale Readout
Our Dynamometer displays grip force in pounds (200 lbs max) and kilograms (90 kg max).
Peak-Hold Needle
For convenience and easy recording, the Lafayette Hand Dynamometer automatically retains the
highest reading. This reading remains on the gauge until the examiner resets it.
Accurate and Reproducible
Isometric in use, with almost no perceptible motion of the handles, regardless of grip strength.
The hand grasp is both comfortable and eective. These features combine to ensure accurate,
reproducible results.
Adjustable Handle
To accommodate various size hands, the Lafayette Hand Dynamometer handle adjusts to ve grip
positions: from 1 3/8 to 3 3/8 inches, in half-inch increments.
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Model J00105 User Instructions
www.lafayetteinstrument.com . [email protected] 3
Benets
Detection of the Malingerer. For various reasons, some patients will be reluctant to exert maximum
eort in grip force evaluation. Repeated tests after short rest periods will detect the malingering
patient. To determine whether the patient is exerting maximum eort:
a. Test grip in the usual manner, taking readings with the hand grip in all positions on the
dynamometer.
b. Test the normal hand, followed by the injured hand, allowing the subject to see readings.
c. After about ve minutes, repeat the test.
Usually, if the subject has carried out the test will full eort, there will be less than 10% variation in
results for various grip positions. But if he has exerted less-than-full-eort, there will be a larger,
erratic variation, sometimes as much as 100% between the two tests.

Lafayette Hydraulic Hand Dynamometer
3700 Sagamore Parkway North Lafayette, IN 47904 . Phone: [phone]
4
Operation
When you use the Lafayette Hand Dynamometer, please remember
that it is a precision instrument and its accuracy can be impaired
by abuse. Have the subject use the wrist safety strap to minimize
the chance of dropping the dynamometer.
To use the dynamometer
1. Set the adjustable handle to the desired spacing. If the handle
is not replaced in the correct position, the readings will not be
accurate.
2. Rotate the red peak-hold needle counterclockwise to 0.
3. Let the subject arrange the instrument so that it ts in his hand
comfortably. Ask him to squeeze with his maximum strength.
The peak-hold needle will automatically record the highest
force he has exerted.
4. After the subject has used the instrument, record the reading.
5. Reset the peak-hold needle to zero before recording new
readings.
Suggested Standard Procedures
1. Sit or stand comfortable
2. Shoulder adducted and neutrally rotated
3. Elbow exed to 90 degrees
4. Forearm in neutral position
5. Wrist in neutral position
6. Each test should be repeated 3 times
7. Use the average as the recorded result
Suggested Interfering Factors
The following factors have shown positive correlation with grip strength:
1. Weight
2. Hand width
3. Height
4. Mesomorphy
Peak-Hold
Needle
Peak-Hold
Knob
Gauge
Needle
Crystal

Model J00105 User Instructions
www.lafayetteinstrument.com . [email protected] 5
Service Tips
The Lafayette Hand Dynamometer is designed to provide reliable service, with minimum maintenance,
over a period of many years. To make sure the instrument is reading accurately, it’s a good idea to
make a few checks, occasionally, as listed below.
Wrist Strap
The Lafayette Hand Dynamometer is equipped with a wrist strap.
Simply place your hand through the strap before grasping the body
of the dynamometer to protect the instrument from damage if
dropped.
Calibration
The instrument is calibrated at the factory using a custom
calibration device. To ensure proper operation, the instrument
should be returned to the manufacturer for calibration on a regular,
preferably, annual basis. If the instrument has been dropped or
there is some particular reason to suspect that the calibration is
in error, the instrument should be serviced by the manufacturer
immediately.
Zero Reading
The gauge needle may be above or below the zero reading upon receipt of the instrument. The gauge
on this instrument is sensitive to pressure changes due to changes in altitude and will most likely
require an adjustment to re-zero the instrument. Follow these steps to return the gauge needle to
zero:
1. Unscrew (counter clockwise) and remove the lens from the gauge (the red peak-hold needle is
attached to the lens)
2. Remove the handle (to prevent applying pressure during this process)
3. Place the instrument on a sturdy surface
4. Using a small slotted screwdriver, rotate the slotted screw counter clockwise in the gauge dial face
until the needle is below zero (if it is already zero, turn the cam until it is slightly farther below
zero)
5. Turn the screw in the reverse direction until the gauge needle is almost touching the zero line
6. Reattach the gauge lens and the handle
7. Pick up and squeeze to apply pressure to the instrument a few times
8. Place the instrument back on a sturdy surface and return the red peak-hold needle to zero by
turning the center knob
9. Check to see that the red peak-hold needle is at zero
10. If the red peak-hold needle is not on zero, repeat steps 1-10 until the red peak-hold needle is at
zero
Zero
Adjustment
Screw

Lafayette Hydraulic Hand Dynamometer
3700 Sagamore Parkway North Lafayette, IN 47904 . Phone: [phone]
6
Red Peak-Hold Needle
Check for excessive friction in the red peak-hold assembly by
turning the peak-hold knob in the lens counterclockwise. If
the peak-hold needle deects the gauge needle, return the
instrument for service. Likewise, if the red peak-hold needle
moves too freely, (i.e. spins without pressure applied) return the
instrument for service.
Cleaning
Cleaning with mild antibacterial soap and water is
recommended. Do not soak or saturate the device with water.
Handle and posts can be cleaned with an isopropyl alcohol
wipe. Do not use alcohol on the plastic gauge faceplate or cover.
Disclaimer: The cleaning instructions for Lafayette Instrument products are a recommendation of
compatible cleaning materials only. Product end users are responsible for instituting an appropriate
cleaning regimen utilizing best practices and techniques. Lafayette Instrument assumes no
responsibility for the cleanliness or sanitation of the products after initial use nor makes any claim that
the use of the recommended cleaning materials mitigates all risk of potential cross infection.
Hydraulics
Any sign of hydraulic oil is an indication of damage to the instrument which requires service by the
manufacturer.
Hydraulic Fluid
Lafayette hand and pinch dynamometers are lled with a biodegradable, plant based hydraulic uid.
Under normal circumstances, the uid is contained within the device and does not come into contact
with the user or patient. If the device is damaged, the uid can leak out and human exposure to the
uid is a possibility. The uid is non-toxic and contains no chemicals known to cause cancer, birth
defects or other reproductive harm. Despite the relative safety of the uid, precautions should be
taken to limit exposure. If exposure occurs, the following guidelines from the Material Safety Data
Sheet (MSDS) of the uid should be followed.
• ORAL: DO NOT INDUCE VOMITING. If conscious, give 2 glasses of water. Get immediate medical
attention.
• EYE: Flush with water at least 15 minutes. Get medical attention if eye irritation develops or
persists.
• SKIN: Wash with soap and water. Remove contaminated clothing. Get medical attention if irritation
develops. Launder contaminated clothing before reuse.
• INHALATION: Remove exposed person to fresh air if adverse eects are observed. If breathing
is labored, administer oxygen. If breathing has stopped, apply articial respiration. If irritation
persists, get medical attention.
Peak-Hold
Needle

Model J00105 User Instructions
www.lafayetteinstrument.com . [email protected] 7
Table: Average Grip-Strength vs Age
Males Females
Age Hand Mean SD Mean SD
6-7 R 32.5 4.8 28.6 4.4
L 30.7 5.4 27.1 4.4
8-9 R 41.9 7.4 35.3 8.3
L 39.0 9.3 33.0 6.9
10-11 R 53.9 9.7 49.7 8.1
L 48.4 10.8 45.2 6.8
12-13 R 58.7 15.5 56.8 10.6
L 55.4 16.9 50.9 11.9
14-15* R 77.3 15.4 58.1 12.3
L 64.4 14.9 49.3 11.9
16-17* R 94.0 19.4 67.3 16.5
L 78.5 19.1 56.9 14.0
18-19* R 108.0 24.6 71.6 12.3
L 93.0 27.8 61.7 12.5
20-24 R 121.0 20.6 70.4 14.5
L 104.5 21.8 61.0 13.1
25-29 R 120.8 23.0 74.5 13.9
L 110.5 16.2 63.5 12.2
30-34 R 121.8 22.4 78.7 19.2
L 110.4 21.7 68.0 17.7
35-39 R 119.7 24.0 74.1 10.8
L 112.9 21.7 66.3 11.7
40-44 R 116.8 20.7 70.4 13.5
L 112.8 18.7 62.3 13.8
45-49 R 109.9 23.0 62.2 15.1
L 100.8 22.8 56.0 12.7
50-54 R 113.6 18.1 65.8 11.6
L 101.9 17.0 57.3 10.7
55-59 R 101.1 26.7 57.3 12.5
L 83.2 23.4 47.3 11.9
60-64 R 89.7 20.4 55.1 10.1
L 76.8 20.3 45.7 10.1
65-69 R 91.1 20.6 49.6 9.7
L 76.8 19.8 41.0 8.2
70-74 R 75.3 21.5 49.6 11.7
L 64.8 18.1 41.5 10.2
75+ R 65.7 21.0 42.6 11.0
L 55.0 17.0 37.6 8.9
* The mean scores for
individuals, aged 14-19
years, may be slightly
low (0-10 lb lower than
they should be) due to
instrument error detected
after the study.

Lafayette Hydraulic Hand Dynamometer
3700 Sagamore Parkway North Lafayette, IN 47904 . Phone: [phone]
References
Everett, P., Sills, F., “The Relationship of Grip Strength to Stature, Somatotype Components, and
Anthropometric Measurements of the Hand,” The Research Quarterly 23: 161-166, 1952.
Ewing-Fess, E., “A Method for Checking Jamar Dynamometer Calibration,” Journal of Hand Therapy
1.1:28-32, 1987.
Gill, D., Reddon, J., Renney, C., Stefanyk, W., “Hand Dynamometer: Eects of Trials and Session,”
Perceptual and Motor Skills 61:195-198, 1985.
Mathiowetz, V., Donahoe, L., Renells, C., “Eect of Elbow Position on Grip and Key Pinch Strength,” The
Journal of Hand Surgery 10A: 694-697, 1985.
Mathiowetz V., Dove, M., Kashman, N., Rogers, S., Volland, G., Weber, K., “Grip and Pinch Strength:
Normative Data for Adults,” Arch Phys Med Rehabilitation 66: 69-72, 1985.
Mathiowetz, V., Federman, S., Wiemer, D., “Grip and Pinch Strength: Norms for 6 to 19 Year Olds,” The
American Journal of Occupational Therapy 40: 705-711,1986.
Mathiowetz, V., Weber, K., Volland, G., Kashman, N., “Reliability and Validity of Grip and Pinch Strength
Evaluations,” The Journal of Hand Surgery, 9A: 22-26, 1984.
Warranty
The Lafayette Hand Dynamometer has a 1 year parts and labor warranty. Please contact our service
department at [email protected] to schedule your yearly calibration or repair.
Any attempt to service or calibrate the dynamometer outside of Lafayette Instrument will void the
warranty.
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Model J00105 User Instructions
www.lafayetteinstrument.com . [email protected]
CE - Declaration of Conformity
World Headquarters EU Authorised Representative
Lafayette Instrument Company AJW Technology Consulting GmbH
3700 Sagamore Parkway North Breite Straße 3
Lafayette, IN 47904 40213 Düsseldorf
U.S.A. Germany
SRN: Pending
Product/Trade Name: Hand and Pinch Dynamometers
Model Designations: 5030L1 Lafayette Professional Hand Dynamometer
5030P1 Lafayette Hydraulic Pinch Gauge
5030K1 Professional Hand Evaluation Kit
J00105 Lafayette Hydraulic Grip Dynamometer
J00109 Hand Evaluation Kit
Basic UDI: 0855170007STRENGTHTESTV9
RISK CLASS: 1
The above listed devices are hereby conrmed to conform to the essential requirements of the
European Union Medical Device Regulations (EU 2017/745)
This declaration of conformity is issued under the sole responsibility of the manufacturer.
Eective Date: October 19, 2021
Person responsible for making this declaration:
Name: Brent E. Smitley
Position/Title: Engineering Manager, Lafayette Instrument Company
Place: Lafayette, Indiana U.S.A.
Legal Signature:
9

Lafayette Hydraulic Hand Dynamometer
3700 Sagamore Parkway North Lafayette, IN 47904 . Phone: [phone]
Manufacturer
Indicates the medical device manufacturer
ISO 15223-1:2016 Ref. 5.1.1
Authorized Representative
Indicates authorized representative in
the EU
ISO 15223-1:2016 Ref. 5.1.2
Date of Manufacture
Indicates date when device was
manufactured
ISO 15223-1:2016 Ref. 5.1.3
Use by Date
Indicates date after which the device is
not to be used
ISO 15223-1:2016 Ref. 5.1.4
Batch Code
Identies the manufacturer's lot or batch
code
ISO 15223-1:2016 Ref. 5.1.5
Catalog Number
Indicates the manufacturer's part
number
ISO 15223-1:2016 Ref. 5.1.6
Serial Number
Identies the manufacturer's serial
number
ISO 15223-1:2016 Ref. 5.1.7
Sterile
Indicates that a device has been subject
to sterilization
ISO 15223-1:2016 Ref. 5.2.1
Do not use if package is damaged
Indicates device should not be used if
opened
ISO 15223-1:2016 Ref. 5.2.8
Non-Sterile
Indicates a device has not been subject
to sterilization
ISO 15223-1:2016 Ref. 5.2.7
Fragile, handle with care
Indicates device that needs careful
handling
ISO 15223-1:2016 Ref. 5.3.1
Keep away from sunlight
Indicates a device needs protection
from sunlight
ISO 15223-1:2016 Ref. 5.3.2
Temperature limit
Indicates upper and lower temperature
limits
ISO 15223-1:2016 Ref. 5.3.7
Keep dry
Indicates device should be protected
from moisture
ISO 15223-1:2016 Ref. 5.3.4
Do not reuse
Indicates a single use device
ISO 15223-1:2016 Ref. 5.4.2
Consult Instructions for use
Prompts the user to consult the user
manual
ISO 15223-1:2016 Ref. 5.4.3
Contains latex
Indicates the presence of natural rubber
latex
ISO 15223-1:2016 Ref. 5.4.5
Caution
Indicates the need to review cautionary
information
ISO 15223-1:2016 Ref. 5.4.4
Humidity Limitation
Indicates the upper and lower limits of
humidity
ISO 15223-1:2016 Ref. 5.3.8
CE Mark
Product is certied for sale in the EU
Regulation (EC) No. 765/2008 Annex II
Made in the USA
Device was manufactured in the USA
No Standard Applicable
Medical Device
Enclosed equipment is classied as a
medical device
No Standard Applicable
Symbol Glossary
The following glossary describes the symbols included on the device label. Some symbols may not
apply to this device.
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Model J00105 User Instructions
www.lafayetteinstrument.com . [email protected] 11
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Lafayette Hydraulic Hand Dynamometer
3700 Sagamore Parkway North Lafayette, IN 47904 . Phone: [phone]
Terms and Conditions
LIC Worldwide Headquarters
Toll-Free: [phone] (USA only)
Phone: [phone]
Fax: [phone]
[email protected]
[email protected] (Outside the USA)
Mailing Address:
Lafayette Instrument Company
PO Box 5729
Lafayette, IN 47903, USA
Lafayette Instrument Europe
Phone: [phone]
Fax: [phone]
Email: [email protected]
Phone, Fax, Email or Mail-in Orders
All orders need to be accompanied by a hard copy of your purchase order. All
orders must include the following information:
• Quantity
• Part Number
• Description
• Your purchase order number or method of pre-payment
• Your tax status (include tax-exempt numbers)
• Shipping address for this order
• Billing address for the invoice we’ll mail when this order is shipped
• Signature and typed name of person authorized to order these products
• Your telephone number
• Your email address
• Your FAX number
Domestic Terms
There is a $50 minimum order. Open accounts can be extended to most
recognized businesses. Net amount due 30 days from the date of shipment
unless otherwise specied by us. Enclose payment with the order; charge with
VISA, MasterCard, American Express, or pay COD. We must have a hard copy
of your purchase order by mail, E-mail or fax. Students, individuals and private
companies may call for a credit application.
International Payment Information
There is a $50 minimum order. Payment must be made in advance by: draft
drawn on a major US bank; wire transfers to our account; charge with VISA,
MasterCard, American Express, or conrmed irrevocable letter of credit.
Proforma invoices will be provided upon request.
Exports
If ordering instrumentation for use outside the USA, please specify the country
of ultimate destination, as well as the power requirements (110V/60Hz or
220V/50Hz). Some model numbers for 220V/50Hz will have a “*C” sux.
Quotations
Quotations are supplied upon request. Written quotations will include the price
of goods, cost of shipping and handling, if requested, and estimated delivery
time frame. Quotations are good for 30 days, unless otherwise noted. Following
that time, prices are subject to change and will be re-quoted at your request.
Cancellations
Orders for custom products, custom assemblies or instruments built to
customer specications will be subject to a cancellation penalty of 100%.
Payment for up to 100% of the invoice value of custom products may
be required in advance. Cancellation for a standard Lafayette Instrument
manufactured product once the product has been shipped will normally be
assessed a charge of 25% of the invoice value, plus shipping charges. Resell
items, like custom products, will be subject to a cancellation penalty of 100%.
Exchanges and Refunds
Please see the cancellation penalty as described above. No item may be
returned without prior authorization of Lafayette Instrument Company and
a Return Goods Authorization (RGA#) number which must be axed to the
shipping label of the returned goods. The merchandise should be packed well,
insured for the full value and returned along with a cover letter explaining the
reason for return. Unopened merchandise may be returned prepaid within
thirty (30) days after receipt of the item and in the original shipping carton.
Collect shipments will not be accepted. Product must be returned in saleable
condition, and credit is subject to inspection of the merchandise.
Repairs
Instrumentation may not be returned without rst receiving a Return Goods
Authorization Number (RGA). When returning instrumentation for service,
please call Lafayette Instrument to receive a RGA number. Your RGA number
will be good for 30 days. Address the shipment to:
Lafayette Instrument Company
3700 Sagamore Parkway North
Lafayette, IN 47904, USA.
Shipments cannot be received at the PO Box. The items should be packed
well, insured for full value, and returned along with a cover letter explaining
the malfunction. An estimate of repair will be given prior to completion
ONLY if requested in your enclosed cover letter. We must have a hard copy
of your purchase order by mail or fax, or repair work cannot commence for
non-warranty repairs.
Damaged Goods
Damaged instrumentation should not be returned to Lafayette Instrument
prior to a thorough inspection. If a shipment arrives damaged, note damage on
delivery bill and have the driver sign it to acknowledge the damage. Contact the
delivery service, and they will le an insurance claim. If damage is not detected at
the time of delivery, contact the carrier/shipper and request an inspection within
10 days of the original delivery. Please call the Lafayette Instrument Customer
Service Department for repair or replacement of the damaged merchandise.
Limited Warranty
Lafayette Instrument Company warrants equipment manufactured by the
company to be free of defects in material and workmanship for a period of one
year from the date of shipment, except as provided hereinafter. The original
manufacturer’s warranty will be honored by Lafayette Instrument for items
not manufactured by Lafayette Instrument Company, i.e. resell items. This
assumes normal usage under commonly accepted operating parameters and
excludes consumable products.
Warranty period for repairs or used instrumentation purchased from Lafayette
Instrument is 90 days. Lafayette Instrument Company agrees either to
repair or replace, at its sole option and free of part charges to the customer,
instrumentation which, under proper and normal conditions of use, proves to
be defective within the warranty period. Warranty for any parts of such repaired
or replaced instrumentation shall be covered under the same limited warranty
and shall have a warranty period of 90 days from the date of shipment or the
remainder of the original warranty period whichever is greater. This warranty
and remedy are given expressly and in lieu of all other warranties, expressed or
implied, of merchantability or tness for a particular purpose and constitutes
the only warranty made by Lafayette Instrument Company.
Lafayette Instrument Company neither assumes nor authorizes any person to
assume for it any other liability in connection with the sale, installation, service or
use of its instrumentation. Lafayette Instrument Company shall have no liability
whatsoever for special, consequential, or punitive damages of any kind from any
cause arising out of the sale, installation, service or use of its instrumentation.
All products manufactured by Lafayette Instrument Company are tested and
inspected prior to shipment. Upon prompt notication by the Customer,
Lafayette Instrument Company will correct any defect in warranted equipment
of its manufacture either, at its option, by return of the item to the factory, or
shipment of a repaired or replacement part. Lafayette Instrument Company will
not be obliged, however, to replace or repair any piece of equipment, which
has been abused, improperly installed, altered, damaged, or repaired by others.
Defects in equipment do not include decomposition, wear, or damage by
chemical action or corrosion, or damage incurred during shipment.
Limited Obligations Covered by this Warranty
1. In the case of instruments not of Lafayette Instrument Company
manufacture, the original manufacturer’s warranty applies.
2. Shipping charges under warranty are covered only in one direction. The
customer is responsible for shipping charges to the factory if return of
the part is required.
3. This warranty does not cover damage to components due to improper
installation by the customer.
4. Consumable and or expendable items, including but not limited to
electrodes, lights, batteries, fuses, O-rings, gaskets, and tubing, are
excluded from warranty.
5. Failure by the customer to perform normal and reasonable maintenance
on instruments will void warranty claims.
6. If the original invoice for the instrument is issued to a company that
is not the company of the end user, and not an authorized Lafayette
Instrument Company distributor, then all requests for warranty must
be processed through the company that sold the product to the end
user, and not directly to Lafayette Instrument Company.
Export License
The U.S. Department of Commerce requires an export license for any polygraph
system shipment with an ULTIMATE destination other than: Australia, Japan,
New Zealand or any NATO Member Countries. It is against U.S. law to ship a
Polygraph system to any other country without an export license. If the ultimate
destination is not one of the above listed countries, contact us for the required
license application forms.