KERN EMB-V 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 instructions
Density Scale
KERN EMB-V
Version 2.0
01/2013
GB
EMB-V-BA-e-1320

EMB-V-BA-e-1210
2
GB
KERN EMB-V
Version 2.0 01/2013
Operating instructions
Density Scale
Contents
1Technical data ................................................................................................ 4
2Appliance overview ....................................................................................... 5
2.1 KERN EMB 200-3V with installed density kit KERN YDB-01...................................... 6
2.2 KERN EMB 2000-2V with installed density kit KERN YDB-02.................................... 7
2.3 Keyboard overview .................................................................................................... 8
2.3.1 Numeric entry ............................................................................................................................. 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...................................................................................10
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, Scope of delivery ...................................................................................11
6.3 Mains connection......................................................................................................12
6.4 Battery operation (optional).......................................................................................12
6.5 Initial Commissioning................................................................................................12
6.6 Adjustment................................................................................................................13
7Basic Operation ........................................................................................... 15
8Density determination ................................................................................. 17
8.1 Principle of Density Determination............................................................................17
8.1.1 Influencing magnitudes and error sources ............................................................................... 18
8.2 Density determination of solids.................................................................................19
8.2.1 Density determination while using the density kits KERN YDB-01 or YDB-02........................ 19
8.2.2 Density determination using the suspended weighing device.................................................. 24
8.2.3 Density determination of solid material with a density of less than 1 g/cm3............................. 27
8.3 Determining density of liquids...................................................................................29
8.3.1 Density determination while using the density kits KERN YDB-01 or YDB-02........................ 29
8.3.2 Density determination using the suspended weighing device.................................................. 31

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9Preconditions for Precise Measurements ................................................. 34
9.1 Calculation of Results...............................................................................................34
9.2 Influence Factors for Measurement Errors................................................................34
9.2.1 Air bubbles................................................................................................................................ 34
9.2.2 Solid body sample .................................................................................................................... 34
9.2.3 Liquids ...................................................................................................................................... 35
9.2.4 Surface ..................................................................................................................................... 35
9.2.5 Sinker for density determination of liquids................................................................................ 35
9.3 General information..................................................................................................35
9.3.1 Density / Relative Density......................................................................................................... 35
9.3.2 Drift of Balance Display ............................................................................................................ 35
10 Density Table for Fluids .............................................................................. 36
11 Uncertainty of Measurement for Density Determination of Solids .......... 37
12 User Instructions ......................................................................................... 38
13 Menu ............................................................................................................. 39
13.1 Navigation in the menu.............................................................................................39
13.2 Menu overview..........................................................................................................40
13.3 Description of individual menu items.........................................................................41
13.4 Interface parameters ................................................................................................44
14 Data output RS 232 C .................................................................................. 45
15 Service, maintenance, disposal .................................................................. 47
15.1 Clean........................................................................................................................47
15.2 Service, maintenance ...............................................................................................47
15.3 Disposal....................................................................................................................47
16 Instant help ................................................................................................... 48

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1 Technical data
KERN EMB 200-3V EMB 2000-2V
Readability (d) 0.001 g 0.01
Weighing range (max) 200 g 2000 g
Reproducibility 0.002 g 0.02
Linearity ± 0.003 g ± 0.03 g
Recommended adjustment
weight, not added (class) 200 g
(F1)
2000 g
(F1)
Stabilization time (typical) 2.5 sec
Warm-up time 2 h
Unit g
Operating temperature +5°C… +35°C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 170 x 240 x 39
Weighing plate mm Ø 82 Ø 150
Battery operation (optional) 9V block
Operating time: 12 h
Mains adapter 100 mA / 9V
AUTO-OFF-function
(With battery operation)
3 min.
Underfloor weighing Standard hooks
Interface RS-232 standard

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2 Appliance overview
KERN EMB 200-3V
KERN EMB 2000-2V
bottom side

Weighing pan 
RS 232

Display 5
Battery compartment
Keyboard 6
Underfloor weighing

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2.1 KERN EMB 200-3V with installed density kit KERN YDB-01
Upper sample dish of the immersion basket
Weighing plate "density kit"
Beaker
Lower sample dish of the immersion basket
Platform

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2.2 KERN EMB 2000-2V with installed density kit KERN YDB-02
Upper sample dish of the immersion basket
Beaker
Lower sample dish of the immersion basket
Platform
Weighing plate "density kit"

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2.3 Keyboard overview
Key Function
•Turn on/off
•Calculate weighing data via interface
•Menu access (longer pressing of the button)
•Cancel process/input
•Density determination mode to switch over to weighing mode
•Numeric input / dialing digits to the right
•Taring / Setting to zero
•Confirm
•Save and exit menu
•Adjustment menu access (longer pressing of the button)
•Density determination access mode for solids
•Scroll backwards in menu
•Density determination access mode for liquids
•Scroll forward in menu
•Weighing in air
•Weighing in liquid
2.3.1 Numeric entry
Key Function
Dialing the digits to the right, each active site flashes.
Each time you press the button, the numerical value of the
flashing digit increases.
Confirm entry

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3 Basic Information (General)
3.1 Proper use
The scale purchased by you is intended to determine the density of solids and
liquids. The determination of the density is based on the Archimedean Principle, see
chapter 8.1.
Furthermore, the scale can also be used to determine the weighing value of the
weighing object. It is intended to be used as a “non-automatic balance”, 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 add-on weighing procedures, if small amounts of
goods to be weighed are removed or added. The “stability compensation“
installed in the balance may result in displaying an incorrect measuring value!
(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

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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.
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.
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 weighing platform, power unit
etc. against shifting and damage.