KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating manual
Electronic Crane Scales
Logbook
Regular maintenance and care
KERN HTS-A
Version 3.1
12/2015
GB
HTS-A-BA-e-1531
HTS_A-BA-e-1531 2
GB
KERN HTS-A
Version 3.1 12/2015
Operating instructions / logbook
Electronic Crane Scales
Contents
1. Technical data ______________________________________________________________ 4
1.1 Dimensions (mm) __________________________________________________________________ 5
2. General Safety Instructions ___________________________________________________ 6
2.1 Duties of the owner-operator _________________________________________________________ 6
2.2 Organizational measures ____________________________________________________________ 6
2.3 Environmental conditions ____________________________________________________________ 6
2.4 Proper use ________________________________________________________________________ 7
2.5 Improper Use ______________________________________________________________________ 7
2.6 Warranty __________________________________________________________________________ 7
2.7 Safe working_______________________________________________________________________ 8
2.8 Monitoring of Test Resources ________________________________________________________ 8
2.9 Testing upon acceptance ____________________________________________________________ 8
2.10 Initial Commissioning _______________________________________________________________ 8
2.11 Shutdown and storage ______________________________________________________________ 8
3. The crane scales at a glance __________________________________________________ 9
3.1 Overview __________________________________________________________________________ 9
3.2 Display __________________________________________________________________________ 10
3.3 Keyboard ________________________________________________________________________ 10
3.5 Infrared remote control unit _________________________________________________________ 11
3.6 Label ____________________________________________________________________________ 12
4. Commissioning ____________________________________________________________ 13
4.1 Unpacking ________________________________________________________________________ 13
4.2 Installing a precision fuse ___________________________________________________________ 13
4.3 Checking the original dimensions ____________________________________________________ 14
4.4 Rechargeable battery operation _____________________________________________________ 14
4.5 Suspending the balance ____________________________________________________________ 15
5. Operation _________________________________________________________________ 16
5.1 Safety instructions _________________________________________________________________ 16
5.2 Loading the crane scales ___________________________________________________________ 17
5.3 Turn on/off _______________________________________________________________________ 20
5.4 Set balance to zero ________________________________________________________________ 21
5.5 Taring ___________________________________________________________________________ 22
3 HTS_A-BA-e-1531
5.6 Weighing _________________________________________________________________________ 22
5.7 Gross / net invocation ______________________________________________________________ 22
5.8 Display backgr ound illumination _____________________________________________________ 22
6. Adjustment and verification __________________________________________________ 23
6.1 Adjustment _______________________________________________________________________ 23
6.2 Verification _______________________________________________________________________ 24
7. Error messages ____________________________________________________________ 25
8. Cleaning and Disposal_______________________________________________________ 25
8.1 Cleaning and Disposal _____________________________________________________________ 25
9. Maintenance and repair ______________________________________________________ 26
9.1 Regular maintenance and care ______________________________________________________ 26
9.2 Regular maintenance ______________________________________________________________ 27
9.3 Checklist „Regular maintenance“, (see chapter 10.2) ___________________________________ 28
10. Enclosure _________________________________________________________________ 31
10.1 Checklist „Enhanced maintenance“ (General revision) __________________________________ 31
10.2 List „spare parts and repair of safety-relevant parts“ ____________________________________ 32
HTS_A-BA-e-1531 4
1. Technical data
KERN
HTS 1T-4AM HTS 3T-3AM HTS 6T-3AM HTS 10T-3AM
Readability (d) 500 g 1 kg 2 kg 5 kg
Weighing range (max) 1 500 kg 3 000 kg 6 000 kg 10 000 kg
Taring range (subtr active) 1 000 kg 3 000 kg 6 000 kg 10 000 kg
Minimum weight (min) 10 kg 20 kg 40 kg 100 kg
Verification value (e) 500 g 1 kg 2 kg 5 kg
Verification class III
Reproducibility 500 g 1 kg 2 kg 5 kg
Linearity ± 1 kg ± 2 kg ± 4 kg ± 10 kg
Recommended adjustment
weight, not added (class)
1.5 t (M2) 3 t (M2) 6 t (M2) 10 t (M2)
Stabilization time 2 s
Warm-u p time 10 min
Unit kg
Allowable ambient temperature -20…+50 °C
Relative humidity 10 to 95 %, non-condensing
Input voltage Appliance 110V - 230V AC
Input voltage Mains adapter 9V, 800 mA
Rechargeable battery
(standard equipment)
6 V 3.2 A
Service life 100 h (background light on)
Loading time 12 h
Display Digit height 25 mm
Housing size W x D x H,
(mm)
270x175x200 270x175x200 300x190x230 300x190x230
Housing material Alu casting, varnished
Material hooks and shackle Forg ed steel
Net weight (kg) 6.5 8.5 12.0 20.0
Infrared remote cont rol unit
(standard equipment)
Block battery 9V
48 x 16 x 95 mm (W x D x H)
Range approx. 10 m
5 HTS_A-BA-e-1531
1.1 Dimensions (mm)
A B C D E F
HTS 1T-4AM
37 29 32.5 314.6 12.7
33.3
HTS 3T-3AM
56 47 42.5 346.75 17.5
42.9
HTS 6T-3AM
60 55 54 440 24.6
58
HTS 10T-3AM
79 61 58 535.35 35
82.6
HTS_A-BA-e-1531 6
2. General Safety Instructions
2.1 Duties of the owner-operator
Follow national accident prevention regulations and all operator health and safety at
work and operating regulations.
Observe all safety regulations of the crane manufacturer.
The balance may only be used for the proposed purpose. Any type of use which
is not specified in these operating instructions, will be considered as improper
use. The customer is solely responsible for material damage and injury of persons
resulting from an improper use, Messrs. KERN & Sohn will not be liable under
any circumstance.
Messrs . KERN & Sohn cannot be held liable, if the crane scales are modified or
used improperly and if damage is resulting from such use.
Inspect and service crane balance, crane and load suspension devices regularly
(see chap. 10).
Log the test result and keep it in the logbook.
2.2 Organizational measures
Only trained and instructed staff may operate the balance.
Make sure that the operating instructions are kept nearby the operation site of the
crane scales.
Assembly, commissioning and maintenance should only be carried out by trained
specialists.
Repair of safety-relevant pieces may only be carried out by KERN or by service
partners authorized by Messrs. KERN. (competence certificate or training).
Us e original spare parts only.
All repairs and spare parts must be documented by the service partner (see list,
chap. 11.2).
All maintenance must be documented (see checklist chap. 10.3).
Load suspending components may only be exchanged as a complete spare parts
set. The dimensions of the new components must be noted (see checklist chapter
10.3).
2.3 Environmental conditions
Never operate the crane scales in explosive environment. The serial version is
not explosion protecte d.
Operate the crane scales only under environmental conditions as specified in
these operating instructions (especially in chapter 1 „Technical data“).
Do not expose the crane scales to strong humidity. Non-permitted condensati on
(condensation of air humidity on the appliance) may occur if a cold appliance is
taken to a considerably warmer environment. In this case, acclimatize the
disconnected appliance for ca. 2 hours at room temperature.
Do not operate the crane scales in corrosive environment.
Protect the crane scales against high humidity, vapours and dust.
7 HTS_A-BA-e-1531
Major display deviations (incorrect weighing results) may be experienced should
electromagnetic fields (e.g. due to mobile phones or radio equipment), static
electricity accumulations or instable power supply occur. Change locati on or
remove source of interference.
2.4 Proper use
The balance you purchased is intended to determine the weighing value of material
to be weighed. It is intended to be used as a “non-automatic“ balance, i.e. the
material to be weighed is suspended on the crane hook only vertically, manually,
carefully and without jerks. As soon as a stable weighing value is reached the
weighing value can be read.
Use the crane scales only for lifting and weighing of freely movable loads.
Danger of injury due to improper use. Not allowed are e.g.:
- Exceeding the allowed nominal load of crane, crane scales or any type of
load attachment devices
- Conveying persons,
- Pulling loads over an inclined surface,
- Tearing-off, pulling or towing loads.
Modifications or reconstructions of the crane scales or of the crane are not
allowed.
2.5 Improper Use
Do not use balance for dynamic weighing. In the event that small quantities are
removed or added to the material to be weighed, incorrect weighing results can be
displayed due to the “stability compensation“. (Example: Slowly draining fluids from a
container suspended on the balance.) Do not leave permanent load suspended on
the balance. This may damage the measuring system as well as safety-relevant
parts.
The balance may only be used according to the described conditions. Other areas of
use must be released by KERN in writing.
2.6 Warranty
Warranty claims shall be voided in case
Our conditions in the operation manual are ignored
The appliance is used outside the described uses
The appliance is modified or opened
Mechanical damage and damage caused by media, liquids,
Natural wear and tear
The appliance is improperly set up or incorrectly electrically connected
The measuring system is overloaded
HTS_A-BA-e-1531 8
2.7 Safe working
Do not stand underneath suspended loads!
Position the crane in a way that the load is lifted vertically.
When working with the crane and crane scales wear personal safety equipment
(helmet, safety shoes etc.).
2.8 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the
balance and, if applicable, the testing weight, must be checked regularly. The
responsible user must define a suitable interval as well as type and scope of this test.
Information is available on KERN’s home page (www.kern-sohn.com) with regard to
the monitoring of balance test substances and the test weights required for this. In
KERN’s accredited DKD calibration laboratory test weights and balances may be
calibrated (return to the national standard) fast and at moderate cost.
2.9 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
2.10 Initial Commissioning
In order to obtain exact results with the electronic balances, your balance must have
reached the operating temperature (see warming up time chap. 1).
During this warming up time the balance must be connected to the power supply
(mains, accumulator or battery).
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
For checking original dimensions, s. chap. 4.2
2.11 Shutdown and storage
Take off the crane scales from the crane and dismantle all load attachment
devices from the crane scales.
Do not store the crane scales at op en ai r
9 HTS_A-BA-e-1531
3. The crane scales at a glance
The crane scales are a multi-purpose and cost-saving solution for overhead weighing
applications such as e.g. recycling, metal processing, machine engineering, transport
and logistics.
With the infrared remote control, operation will be more comfortable yet.
3.1 Overview
Balance
1
Shackle
2
Display
3
Keyboard
4
Safety bracket
5
Hook, not rev olvabl e
Infrared remote control u nit
Keyboard, see chapter 3.4
HTS_A-BA-e-1531 10
3.2 Display
1 Indicator net weight
2 Indicator zero display
3 Indicator gr oss weight
4 Stability display
5 Battery charge display
3.3 Keyboard
Button
Description of function
• Zeroing
• Taring
• Gross weight Net weight
• Background illumination of the display on/off
• Turn on/off balance
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