KERN HTS-A User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]
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 background 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 (subtractive) 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-up 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 Forged steel
Net weight (kg) 6.5 8.5 12.0 20.0
Infrared remote control 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).
Use 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 protected.
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 condensation
(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 location 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 open air

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 revolvable
Infrared remote control unit
Keyboard, see chapter 3.4

HTS_A-BA-e-1531 10
3.2 Display
1 Indicator net weight
2 Indicator zero display
3 Indicator gross 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

11 HTS_A-BA-e-1531
3.5 Infrared remote control unit
The balance can be operated by the radio remote control like by a keyboard. All
functions (excepted ON/OFF) can be selected.
The red LED must light up when any button is pressed. If it does not light up, the
batteries in the remote control must be exchanged.
Range on free surface (free of buildings) approx. 10 m.
Point the remote control at the balance.
„ON“ Switching on only possible during
standby mode of the balance.
„OFF“ Set balance into stand-by mode
Zeroing
Taring
Gross weight Net weight

HTS_A-BA-e-1531 12
3.6 Label
Do not stand or go under suspended loads.
Do not use on building site.
Keep an eye on suspended loads.
(example)
Do not exceed nominal load of crane scales.

13 HTS_A-BA-e-1531
4. Commissioning
Attention: Always observe chapter 2 „General Safety Instructions“!
4.1 Unpacking
SAFETY
INSTRUCTIONS
for protection against
break
Once delivered and unpacked, crane scales will not be
taken back.
The crane scales have been sealed by Messrs. KERN.
Shackles and hooks are sealed by Sella tape.
The packaging is also sealed by adhesive tape.
+
Broken seal obliges to purchase.
Thanks for your comprehension.
Your KERN Quality assurance team
Danger for the back!
The crane scales are compact and quite heavy.
Remove the scales from packaging only with the help of
a second person.
Use a lifting device such as a crane or a forklift truck.
Secure the scales that they cannot fall down when they
are lifted.
Only use original packaging for returning.
Make sure that all parts are completely present.
•Crane scales
•Mains adapter
•Precision fuse
•Remote control
•Operating instructions (logbook)
4.2 Installing a precision fuse
Prior to starting up the balance insert the fuse as shown on the image below.
Remove the fuse for longer transport or when balance is not in use.

HTS_A-BA-e-1531 14
4.3 Checking the original dimensions
Enter the original dimensions shown on the production data sheet in the grey
boxes of checklist chap. 10.3.
Check original dimension of crane scales; for implementation see chap. 10.2
„Regular Maintenance“
Enter all data (date, tester, results) in the first line under „Inspection before first
use“ in the checklist (see chapter 10.3)
CAUTION
If the dimensions of your first safety inspection do not match those
of KERN, the balance must not be put into operation. In this case
please contact a service partner authorised by Messrs. KERN.
4.4 Rechargeable battery operation
CAUTION
Material damage on crane scales
Only use the delivered mains adapter.
Make sure that the mains adapter, the cable and the
mains plug are in a perfect condition.
Do not use the crane scales during the loading process.
Before the first use, the rechargeable battery should be charged by connecting it to
the mains power cable for at least 24 hours. The operating time of the rechargeable
battery is approx. 100 hours.
If the capacity of the rechargeable battery is exhausted, „LOb“ appears. The balance
will be ready to operate for about another 10 minute, then it will switch off
automatically. Connect the power cable as soon as possible to load the rechargeable
battery.
When the crane scales are out of operation for a longer period, remove the
rechargeable battery.

15 HTS_A-BA-e-1531
4.5 Suspending the balance
Condition
The crane needs a safety bracket (1) that the unloaded crane scales cannot fall
down.
If the safety bracket is missing or damaged, please contact the crane manufacturer in
order to receive a hook with this safety equipment.
Suspend the crane scales on the lower hook of a crane and close the safety
bracket.
The crane scale’s upper eyelet should rest in the saddle (2).

HTS_A-BA-e-1531 16
5. Operation
5.1 Safety instructions
Danger
Risk of injury due to falling loads!
Take great care when operating the crane and follow the
general rules for crane operation.

Check all parts (hook, eyelet, rings, rope slings, cables,
chains etc.) for excessive wear or damage

If faults can be seen on the safety bracket of the hook
or if it is missing
completely, the scales must not be
used
Work only with appropriate speed
Always avoid vibrations and horizontal forces. Avoid
any kind of shock, torsion and oscillating (e.g. caused
by inclined suspending)
Do not use the crane scales for transporting loads.
Do not stand or go under suspended loads.
Do not use on building site.

17 HTS_A-BA-e-1531
Keep an eye on suspended loads.
(example)
Do not exceed the nominal load of crane, crane scales
or any kind of load attachment devices at the crane
scales.
5.2 Loading the crane scales
For good weighing results observe the following, illustrations see next page:
Only use load attachment devices which guarantee a one-spot suspension and
where the scales can be suspended freely.
Do not use too large load attachment devices which do not guarantee any one-
spot suspension.
Do not use multiple suspensions.
Do not pull or push the load or the loaded balance.
Do not pull the hook horizontally.
Loading the balance
1. Position the hook of the crane scales over the load.
2. Move downwards the crane scales until the load can be suspended on the hook
of the balance. Reduce the speed when the respective height is going to be
reached.
3. Suspend the load on the hook. Ensure that the safety bracket is closed. If the load
is fixed by slings, ensure that the slings rest completely on the saddle of the
balance hook.
4. Lift-off the load slowly.
When the load is fixed by slings, ensure that the load is well balanced on both
sides and that the slings are correctly positioned

HTS_A-BA-e-1531 18
Only use load attachment devices
which guarantee a one-point
suspension and where the scales
can be suspended freely.
Do not use too large load
attachment devices which cannot
guarantee a one-point
suspension.

19 HTS_A-BA-e-1531
Do not push or pull
Do not pull the hook
horizontally
Do not use multiple
suspensions

HTS_A-BA-e-1531 20
5.3 Turn on/off
Start-up
Press on the keyboard of the balance. The display lights up and the balance
carries out a selftest. The display runs through “PoUP2„ESC2“„8.8.8.88“,
followed by the battery loading status (e.g. “CH5“ corresponds to a battery loading
status of 50%) and the check number of adjustments. The selftest is completed
when the weight value 0 appears on the display.
Battery loading status:
The battery loading status is represented in the form of “CH .x“, such as
This corresponds to a battery loading status of 90%.
Check number:
For verified balances pay attention to check number!
The check number will be shown after the balance has been turned on. This
number will be adjusted automatically after each adjustment activity. In
verified balances this number is an integral part for conformity evaluation.
This allows you to check at any time whether new adjustment has been
carried out.
To display the check number, turn the balance off and then restart it with . The
display shows successively e.g.:
8.8.8.8.8
Check LCD segments
CH .9
Battery loading status (example: CH .9 corresponds to a battery
loading status of 90%
8985
Check number
•Switching on/off only possible on the keyboard of the balance.
•Using the remote control unit, the balance can only be switched on from
the standby mode.