KERN WTB-N User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected]
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating instructions
Compact balance
KERN WTB-N
Version 2.0
09/2012
GB
WTB-N-BA-e-1220

WTB-N-BA-e-1220 2
GB
KERN WTB-N
Version 2.0 09/2012
Operating instructions
Compact balance
Contents
1Technical data ............................................................................................ 3
1.1 Dimensions............................................................................................................................. 5
2Appliance overview.................................................................................... 6
2.1 Overview of display................................................................................................................ 6
2.2 Keyboard overview................................................................................................................. 8
3Basic Information (General) ...................................................................... 9
3.1 Proper use.............................................................................................................................. 9
3.2 Improper Use ......................................................................................................................... 9
3.3 Warranty................................................................................................................................. 9
3.4 Monitoring of Test Resources................................................................................................ 9
4Basic Safety Precautions ........................................................................ 10
4.1 Pay attention to the instructions in the Operation Manual ................................................... 10
4.2 Personnel training ................................................................................................................ 10
5Transport and storage ............................................................................. 10
5.1 Testing upon acceptance..................................................................................................... 10
5.2 Packaging / return transport................................................................................................. 10
6Unpacking, Setup and Commissioning.................................................. 11
6.1 Installation Site, Location of Use.......................................................................................... 11
6.2 Unpacking and placing......................................................................................................... 12
6.2.1 Scope of delivery.................................................................................................................. 14
6.3 Rechargeable battery operation (optional)........................................................................... 14
6.3.1 Mains connection during rechargeable battery operation.................................................... 16
6.4 Initial Commissioning........................................................................................................... 17
6.5 Type of protection IP65........................................................................................................ 17
7Adjustment ............................................................................................... 17
7.1 Adjustment ........................................................................................................................... 17
7.1.1 Adjustment ........................................................................................................................... 18
8Operation .................................................................................................. 19
8.1 Weighing .............................................................................................................................. 19
8.2 Taring................................................................................................................................... 19
8.3 Background illumination....................................................................................................... 20
8.4 Weighing with tolerance range............................................................................................. 21
9The menu .................................................................................................. 23
9.1 Navigation in the menu ........................................................................................................ 23
9.2 Menu overview..................................................................................................................... 24
9.3 Set auto-OFF function.......................................................................................................... 25
9.4 Multi-Tare function ............................................................................................................... 26
10 Error messages........................................................................................ 26
11 Instant help............................................................................................... 27
12 Service, maintenance, disposal.............................................................. 28
12.1 Cleaning............................................................................................................................... 28
12.2 Service, maintenance........................................................................................................... 28
12.3 Disposal................................................................................................................................ 28

3 WTB-N-BA-e-1220
1 Technical data
KERN
WTB
1K -4N
WTB
3K -3N
WTB
6K -3N
Weighing range (max)
1.5 kg
3 kg
6 kg
Readability (d)
0.2 g
0.5 g
1 g
Reproducibility
0.2 g
0.5 g
1 g
Linearity
±0.4 g
±1 g
±2 g
Recommended adjustment
weight, not added (class)
1500 g
(M1)
3 kg
(M1)
6 kg
(M1)
Stabilization time (typical)
2 sec.
Units
kg
Warm-up time
30 min.
Electric Supply
Input voltage: 110V-230V AC
Power supply unit: 12 V, 500 mA
Rechargeable battery
operation
Service life: background illumination ON: 30 h
Background illumination off: 50 hours
Loading time 12 h
Auto-Off (rechargeable
battery)
15 min., 5 min., 3 min., off
Display type
LCD with background illumination
Character height 2.5 cm
Operating temperature
-10° C …. + 40° C
Humidity of air
0 % - 80 % (non-condensing)
Dimensions of weighing plate
(Stainless steel) (mm)
262 x 202
Casing dimensions
286 x 316 x 126.5
Weight kg (net)
3.2
IP protection
IP65

WTB-N-BA-e-1220 4
KERN
WTB
10K -3N
WTB
30K -3N
Weighing range (max)
15 kg
30 kg
Readability (d)
2 g
5 g
Reproducibility
2 g
5 g
Linearity
±4 g
±10 g
Recommended adjustment
weight, not added (class)
15 kg
(M1)
30 kg
(M1)
Stabilization time (typical)
2 sec.
Units
kg
Warm-up time
30 min.
Electric Supply
Input voltage: 110V-230V AC
Power supply unit: 12 V, 500 mA
Rechargeable battery
operation
Service life: background illumination ON: 30 h
Background illumination off: 50 hours
Loading time: 12 h
Auto-Off (rechargeable
battery)
15 min., 5 min., 3 min., off
Display type
LCD, digit height 25 mm
Operating temperature
-10° C …. + 40° C
Humidity of air
0 % - 80 % (non-condensing)
Dimensions of weighing plate
(Stainless steel) (mm)
262 x 202
Casing dimensions
286 x 316 x 126.5
Weight kg (net)
3.2
IP protection
IP65

5 WTB-N-BA-e-1220
1.1 Dimensions

WTB-N-BA-e-1220 6
2 Appliance overview
1Weighing plate
2Keyboard
3Bubble level
4Display
2.1 Overview of display
Rear view:

7 WTB-N-BA-e-1220
Display
Description
Description
Zeroing display
Should the balance not display exactly zero
despite empty scale pan, press the
button. The balance will be set to zero after a
short standby time.
Stability display
Scales are in a steady state
Net weight display
Net weight will be displayed
Capacity display
Rechargeable battery
Triangle above the capacity indicator appears
when the battery capacity is almost exhausted
Display Weighing with
tolerance range
Triangle above "+": upper limit value
Triangle above "-": lower limit value
Power supply connected
Lights with power supply via power supply unit,
then the battery is being charged
Display Weighing unit kg
Displayed weight in kg

WTB-N-BA-e-1220 8
2.2 Keyboard overview
Key
Description
Function
in menu
ON/OFF-switch
Turn on/off
TARE button
Tare balance
Weighing with
tolerance range
Call up menu
Change to the next menu
item /parameter
Zero setting key
Set balance to zero
Select menu item /
parameter
+
Push TARE + reset
button
simultaneously
Switch-over units

9 WTB-N-BA-e-1220
3 Basic Information (General)
3.1 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 balcance”, i.e. the
material to be weighed is manually and carefully placed in the centre of the weighing
pan.. As soon as a stable weighing value is reached the weighing value can be read.
3.2 Improper Use
Do not use balance for dynamic weighings. 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 on the balance.)
Do not leave permanent load on the weighing pan. This may damage the measuring
system.
Impacts and overloading exceeding the stated maximum load (max) of the balance,
minus a possibly existing tare load, must be strictly avoided. Balance may be
damage by this.
Never operate balance in explosive environment. The serial version is not explosion
protected.
The structure of the balance may not be modified. This may lead to incorrect
weighing results, safety-related faults and destruction of the balance.
The balance may only be used according to the described conditions. Other areas of
use must be released by KERN in writing.
3.3 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 or damage by media, liquids, natural wear and tear
The appliance is improperly set up or incorrectly electrically connected
The measuring system is overloaded
3.4 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.

WTB-N-BA-e-1220 10
4 Basic Safety Precautions
4.1 Pay attention to the instructions in the Operation Manual
Carefully read this operation manual before setup and commissioning,
even if you are already familiar with KERN balances.
All language versions contain a non-binding translation. The original
German is binding.
4.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
5 Transport and storage
5.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
5.2 Packaging / return transport
Keep all parts of the original packaging for a possibly required return.
Only use original packaging for returning.
Prior to dispatch disconnect all cables and remove loose/mobile
parts.
Reattach possibly supplied transport securing devices.
Secure all parts such as the glass wind screen, the weighing
platform, power unit etc. against shifting and damage.