KERN & SOHN CM 50-C2N User Manual

KERN & Sohn GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Operating instructions
Pocket balance

KERN CM

Version 1.8
10/2006
GB

Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com

CM-BA-e-0618

GB

KERN CM

Version 1.8 10/2006

Operation instructions
Pocket Balance

Table of contents

1 Technical data ----------------------------------------------------------------------------------- 3
2 Declaration of conformty--------------------------------------------------------------------­3 Fundamental information (general)-------------------------------------------------------

3.1 Intended use------------------------------------------------------------------------------------------- 5

3.2 Inappropriate use------------------------------------------------------------------------------------- 5

3.3 Guarantee---------------------------------------------------------------------------------------------- 5

3.4 Monitoring the test substances ------------------------------------------------------------------- 5

4 Fundamental safety information----------------------------------------------------------- 6

4.1 Observe the information in the operating instructions -------------------------------------- 6

4.2 Staff training ------------------------------------------------------------------------------------------- 6

5 Transport and storage ------------------------------------------------------------------------ 6

5.1 Acceptance check------------------------------------------------------------------------------------ 6

5.2 Packaging ---------------------------------------------------------------------------------------------- 6

6 Unpacking, installation and commissioning ------------------------------------------ 6

6.1 Place of installation, place of use ----------------------------------------------------------------6

6.2 Unpacking---------------------------------------------------------------------------------------------- 7

6.2.1 Installation ----------------------------------------------------------------------------------------------------7

6.2.2 List of items supplied--------------------------------------------------------------------------------------- 7

6.3 Battery operation and change--------------------------------------------------------------------- 7

6.4 Draft shield + weighing container (CM 50-C2N, CM 500-GN1) -------------------------- 8

6.5 Initial start-up ------------------------------------------------------------------------------------------ 8

6.6 Adjustment --------------------------------------------------------------------------------------------- 8

6.7 Adjusting------------------------------------------------------------------------------------------------ 8

7 Operation------------------------------------------------------------------------------------------ 9

7.1 Overview of display CM 60-2N / CM 150-1N / CM 320-1N / CM 1K1N ---------------- 9

7.2 Overview of display CM 50-C2N ----------------------------------------------------------------- 9

7.3 Overview of display CM 500-GN1 --------------------------------------------------------------- 9

7.4 Operating elements---------------------------------------------------------------------------------- 9

7.4.1 Weighing ------------------------------------------------------------------------------------------------------9

7.4.2 Taring -------------------------------------------------------------------------------------------------------- 10

7.4.3 Plus/Minus Weighings ----------------------------------------------------------------------------------- 10

7.4.4 Net-total weighings --------------------------------------------------------------------------------------- 10

7.4.5 Unit change------------------------------------------------------------------------------------------------- 11

7.5 Rear illuminated display -------------------------------------------------------------------------- 12

7.6 Calculator -------------------------------------------------------------------------------------------- 13

8 Maintenance, upkeep, disposal-----------------------------------------------------------13

8.1 Cleaning ---------------------------------------------------------------------------------------------- 13

8.2 Maintenance, upkeep ----------------------------------------------------------------------------- 13

8.3 Disposal ---------------------------------------------------------------------------------------------- 13

9 Troubleshooting -------------------------------------------------------------------------------

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CM-BA-e-0618

1 Technical data

KERN CM 60-2N CM150-1N CM 320-1N CM 1K1N

Readout (d) 0,01 g 0,1 g 0,1 g 1 g
Weighing range (max) 60 g 150 g 320 g 1.000 g
Taring range (subtractive) 60 g 150 g 320 g 1.000 g

Recommended adjusting weight,
not included (class)

50 g

(M2)

100 g

(M3)

200 g

(M3)

1000 g

(M3)

Optimal temperature range 18 – 25 °C
Units g / tol / tlt
Permissible relative humidity < 85 %(non-condensing)
Weighing plate mm 70 x 80
Size (B x H x T) mm 85 x 130 x 25

KERN CM 50-C2N CM 500-GN1

Readout (d) 0,01 ct 0,002 g 0,1 gn 0,01 g
Weighing range (max) 50ct 10 g 500 gn 32 g
Taring range (subtractive) 50ct 10 g 500 gn 32 g
Test weight (included) 5 g (M1) 10 g (M2)
Units ct / g g / gn
Optimal temperature range 18 – 25 °C
Permissible relative humidity < 85 % (non-condensing)
Weighing plate mm 40 x 50
Size (B x H x T) mm 85 x 130 x 25

CM-BA-e-0618

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2 Declaration of conformty

Declaration of Conformity

The electronic pocket balance

Type: KERN CM 60-2N

KERN CM 150-1N
KERN CM 250-1N
KERN CM 1K1N
KERN CM 50-C2N
KERN CM 500-GN1

correspond to the following EC requirements:

EC-EMC-directive version 89/336/EEC

Compatible norms are, in particular

Standards for electronic scale.

EN 61000-6-3 :2001
EN 61000-6-1 :2001
Standard for calculator :
EN 55022 : 1998+A1 : 2000
EN 55024 : 1998+A1 : 2001

If a change is made to the above mentioned appliances without consulting KERN

this declaration will become invalid

Date: 01.10 2004 Signature:
Gottl. KERN & Sohn GmbH
Management

Gottl. KERN & Sohn GmbH, Ziegelei 1, 72336 Balingen-Frommern, Tel. [phone], Fax [phone]

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CM-BA-e-0618

3 Fundamental information (general)

3.1 Intended use

The balance you have acquired serves to determine the weighing value of the mate­rial to be weighed. 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
plate. The weighing value can be read off after a stable weighing value has been ob­tained.

3.2 Inappropriate use

Do not use the 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“ in the balance. (Example: Slowly drain­ing fluids from a container on the balance.)
Do not leave a permanent load on the weighing plate. This can damage the measur­ing equipment.
Be sure to avoid impact shock and overloading the balance in excess of the pre­scribed maximum load rating (max.), minus any possible tare weight that is already
present. This could cause damage to the balance.
Never operate the balance in hazardous locations. The series design is not explo­sion-proof.
Structural alterations may not be made to the balance. This can lead to incorrect
weighing results, faults concerning safety regulations as well as to destruction of the
balance.
The balance may only be used in compliance with the described guidelines. Varying
areas of application/planned use must be approved by KERN in writing.

3.3 Guarantee

The guarantee is not valid following

• non-observation of our guidelines in the operating instructions

• use outside the described applications

• alteration to or opening of the device

• mechanical damage and damage caused by media, liquids

• natural wear and tear

• inappropriate erection or electric installation

• overloading of the measuring equipment

3.4 Monitoring the test substances

The metrology features of the balance and any possible available adjusting weight
must be checked at regular intervals within the scope of quality assurance. For this
purpose, the answerable user must define a suitable interval as well as the nature
and scope of this check. 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. Test weights and balances can be adjusted quickly and at
a reasonable price in KERN’s accredited DKD calibration laboratory (return to na­tional normal).

CM-BA-e-0618

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