KERN & SOHN FOB 30K-3NL User Manual

KERN & Sohn GmbH

Ziegelei 1	Phone: +49-[0]7433- 9933-0
D-72336 Balingen	Fax: +49-[0]7433-9933-149
E-Mail: [e-mail]	Internet: www.kern-sohn.com

Operating manual

Compact balance

KERN FOB-N

Version 1.0

09/2014

GB

FOB-NS

FOB-NL

FOB-N-BA-e-1410

		KERN FOB-N
	GB	Version 1.0 09/2014
		Operating manual
		Compact balance
Contents
1	Technical data................................................................................................		4
2	Basic Information (General)..........................................................................		6
2.1	Proper use ..................................................................................................................................		6
2.2	Improper Use..............................................................................................................................		6
2.3	Warranty .....................................................................................................................................		6
2.4	Monitoring of Test Resources.....................................................................................................		7
3	Basic Safety Precautions ..............................................................................		7
3.1	Pay attention to the instructions in the Operation Manual..........................................................		7
3.2	Personnel training.......................................................................................................................		7
4	Transport and storage...................................................................................		7
4.1	Testing upon acceptance ...........................................................................................................		7
4.2	Packaging / return transport .......................................................................................................		7
5	Unpacking, Setup and Commissioning .......................................................		8
5.1	Installation Site, Location of Use ................................................................................................		8
5.2	Unpacking...................................................................................................................................		8
5.2.1	Placing ........................................................................................................................................		9
5.2.2	Scope of delivery ........................................................................................................................		9
5.3	Mains connection (optional)........................................................................................................		9
5.4	Battery operation ........................................................................................................................		9
5.5	Initial Commissioning................................................................................................................		10
5.6	Adjustment................................................................................................................................		10
5.7	Adjustment................................................................................................................................		10
6	Operating elements .....................................................................................		13
6.1	Keyboard overview ...................................................................................................................		13
6.1.1	Models FOB-NS: ......................................................................................................................		13
6.1.2	Models FOB-NL:.......................................................................................................................		14
6.2	Overview of display	..................................................................................................................	15
6.2.1	Models FOB-NS: ......................................................................................................................		15
6.2.2	Models FOB-NL:.......................................................................................................................		15
7	Operation......................................................................................................		16
7.1	Simple weighing .......................................................................................................................		16
7.2	Taring........................................................................................................................................		17
7.3	Weighing units switch-over.......................................................................................................		17
7.4	Hold function (only "L" models) ................................................................................................		18
7.5	Backlight of the display (only "L" models) ................................................................................		19

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8	The menu......................................................................................................	20
8.1	Call up menu ............................................................................................................................	20
8.2	Navigation in the menu.............................................................................................................	20
8.3	Menu overview .........................................................................................................................	21
8.3.1	Models FOB-NS: ......................................................................................................................	21
8.3.2	Models FOB-NL:.......................................................................................................................	21
8.4	Menu settings ...........................................................................................................................	22
8.4.1	Setting weighing units...............................................................................................................	22
8.4.2	Automatic switch-off function „AUTO OFF“ in stand-by mode .................................................	24
9	Error messages............................................................................................	26
10	Servicing, maintenance, disposal ..............................................................	26
10.1	Cleaning....................................................................................................................................	26
10.2	Servicing, maintenance ............................................................................................................	26
10.3	Disposal....................................................................................................................................	26
11	Instant help...................................................................................................	27

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1 Technical data

Models „FOB-NS“:

	KERN		FOB 0.5K-4NS		FOB 5K-3NS
	Readability (d)		0.1 g		1 g
	Weighing range (max)		500 g		5000 g
	Reproducibility		0.1g		1 g
	Linearity		± 0.2 g		± 2 g
	Weighing Units		g, lb, oz, ozt, dwt
	Recommended adjustment		500 g (M1)		5000 g (M1)
	weight, not added (class)
	Warm-up time		10 min
	Stabilization time (typical)		2 sec.
	Operating temperature		+ 10° C .... + 35° C
	Humidity of air		25% - 95% (non-condensing)
	Housing (B x D x H) mm		170 x 150 x 40
	Weighing plate, stainless steel		120 x 150 x 10
	(mm)
	Weight kg (net)		650 g
	Auto off		Options: 2, 3, 4, 5, min; off
	Battery		9 V block
	Secondary voltage powerpack		9 V / 100 mA
	IP protection		IP65

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Models „FOB-NL“:

	KERN		FOB 7K-4NL		FOB 10K-3NL		FOB 30K-3NL
	Readability (d)		0.5 g / 1 g		1 g / 2 g		2 g / 5 g
	Weighing range (max)		5 kg / 7.5 kg		8 kg / 15 kg		16 kg / 30 kg
	Reproducibility		0.5 g / 1 g		1 g / 2 g		2 g / 5 g
	Linearity		± 1.5 g / 3 g		± 3 g / 6 g		± 6 g / 15 g
	Weighing Units				g, lb, oz, ozt, dwt
	Recommended adjustment		5 kg (M1)		10 kg (M1)		30 kg (M1)
	weight, not added (class)
	Warm-up time		30 min		30 min		30 min
	Stabilization time (typical)				2 sec.
	Operating temperature			+ 5° C …. + 35° C
	Humidity of air		25% - 95% (non-condensing)
	Housing (B x D x H) mm				285 x 255 x 90
	Weighing plate, stainless steel				252 x 200 x 14
	(mm)
	Weight kg (net)				3611 g
	Auto off				2 min
	Battery				4 x 1,5 V AA
	Secondary voltage powerpack				9 V / 100 mA
	IP protection				IP67

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2 Basic Information (General)

2.1Proper 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 manually and carefully placed in the centre of the weighing plate. As soon as a stable weighing value is reached the weighing value can be read.

2.2Improper 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 on the balance.)

Do not leave permanent load on the weighing plate. 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.

2.3Warranty

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

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2.4Monitoring 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.

3 Basic Safety Precautions

3.1Pay 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.

3.2Personnel training

The appliance may only be operated and maintained by trained personnel.

4 Transport and storage

4.1Testing upon acceptance

When receiving the appliance, please check packaging immediately, and the appliance itself when unpacking for possible visible damage.

4.2Packaging / 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 plate, power unit etc. against shifting and damage.

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5 Unpacking, Setup and Commissioning

5.1Installation Site, Location of Use

The balances are designed in a way that reliable weighing results are achieved in common conditions of use.

You will work accurately and fast, if you select the right location for your balance.

Therefore, observe the following for the installation site:

•Place the balance on a firm, level surface;

•Avoid extreme heat as well as temperature fluctuation caused by installing next to a radiator or in the direct sunlight;

•Protect the balance against direct draughts due to open windows and doors;

•Avoid jarring during weighing;

•Protect the balance against high humidity, vapours and dust;

•Do not expose the device to extreme dampness for longer periods of time. 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.

•Avoid static charge of goods to be weighed or weighing container.

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.

5.2Unpacking

Carefully remove the weighing balance from the packaging and install it at the designated work place.

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5.2.1 Placing

The balance must be installed in a way that the weighing plate is exactly in horizontal position.

5.2.2 Scope of delivery Serial accessories:

•Balance

•Weighing plate

•Mains adapter (optional)

•Protective cover

•Operating manual

5.3Mains connection (optional)

The balance may be operated via the optional mains adapter. The stated voltage value must be the same as the local voltage.

Only use original KERN mains adapters. Using other makes requires consent by KERN.

5.4Battery operation

Unscrew battery cover on the bottom of the housing (see figure 1).

•9 V block battery (FOB-NS) or

•4 x 1.5V AA batteries (FOB-NL)

Put battery cover back in place and tighten it.

Fig. 1:

	FOB-NS		FOB-NL

When you tighten the battery cover, make sure that not too much pressure is put on the weighing plate. The load cell may be damaged.

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