KERN 1500-2M Manual de usuario

EW-BA-defsi-0620 17

1 Technical data

KERN EW 150-3M EW 600-2M EW 1500-2M

Readout (d) 0,001 g 0,01 g 0,01 g

Verification value (e) 0,01 g 0,1 g 0,1 g

Weighing range (Max) 150 g 600 g 1.500 g

Min. load (Min) 0,02 g 0,5 g 0,5 g

Taring range 150 g 600 g 1.500 g

Reproducibility 0,002 g 0,01 g 0,01 g

Linearity ± 0,003 g ± 0,02 g ± 0,02 g

Recommended adjusting

weight, not included (class)

1 x 100g

+ 1 x 20g (F1) 500 g (F2) 1 x 1 kg

+ 1 x 200 g (F1)

Stabilisation time 2 sec.

Weighing plate, stainless steel Ø 110 mm Ø 140 mm Ø 140 mm

Balance dimensions 180 x 230 x 85 mm

Mains adapter 230 V, 50/60 Hz, balance 9 V DC, 400 mA

Net weight (kg) 2,0

Air humidity max. 80 % relative (non-condensing)

Ambient temperature 0° C to 40° C

Authorised surroundings

conditions for verifiable

applications

10° C to 30° C

Units g, ct

Vibration filter yes

Interface RS 232 C interface (as option)

Accu as option

EW-BA-defsi-0620

KERN EW 3000-2M EW 6000-1M

Readout (d) 0,01 g 0,1 g

Verification value (e) 0,1 g 1 g

Weighing range (Max) 3.000 g 6.000 g

Min. load (Min) 0,5 g 5 g

Taring range 3.000 g 6.000 g

Reproducibility 0,01 g 0,1 g

Linearity ± 0,02 g ± 0,2 g

Recommended adjusting

weight, not included (class)

1 x 2 kg

+1 x 1kg (E2) 5 kg (F2)

Stabilisation time 2 sec.

Weighing plate, stainless steel Ø 140 mm

Balance dimensions 180 x 230 x 85 mm

Mains adapter 230 V, 50/60 Hz, balance 9 V DC, 400 mA

Net weight (kg) 2,0

Air humidity max. 80 % relative (non-condensing)

Ambient temperature 0° C to 40° C

Authorised surroundings

conditions for verifiable

applications

10° C to 30 ° C

Units g, ct

Vibration filter yes

Interface RS 232 C interface (as option)

Accu as option

EW-BA-defsi-0620 19

2 Unpacking and standard accessories

Take the balance carefully out of the packing and store the plastic wrap for a possible

future transport.

The standard accessories consist of:

Balance

Weighing pan

Weighing pan support

External mains adapter

Operating instructions

3 Setting up the balance

Place the pan base packed with the weighing pan on the balance. Fix it on the

shaft by driving the knurled nut in the centre. Place the weighing pan properly on

the pan base.

Place the balance on a firm surface. See also chapter 11.

Drive the adjusting legs to centre the bubble in the circle of the level (front left in

the housing).

EW-BA-defsi-0620

4 External view

Key functions

ON/OFF ON/OFF key for lighting display

Print Print key or data transmission key

FFunction key, to call various functions

TARE Zeroing / Taring key – parameter selection key

EW-BA-defsi-0620 21

Display panel

5 Installation

Please note that your KERN balance is a precision weighing instrument. Even if the

instrument is made for robust and continuous use, please handle it carefully and do

avoid unnecessary use.

The balance requires a warm-up time. The optimum weighing results are achieved

when starting to used the balance only 5 minutes after turning it on.

6 Power supply

Plug balance into a socket 230 V / 50 Hz. Do not connect it when there should be

another mains voltage.

Socket must be grounded as per VDE prescription. Inspection by authorised special

electrical shop only.

Plug the adapter cable on the back of the balance.

Only then:

Plug the given mains adapter (230 V AC / 9 V DC / 400 mA) in the socket.

The balance is now in the Standby mode, see "Power Display *"

Press now the ON/OFF key

The balance performs now a self-check.

After approx. 5 - 8 seconds the balance is ready to operate.

EW-BA-defsi-0620

7 Declaration of conformity

Declaration of conformity

The electronic precision balances

Type: KERN EW 150-3M

KERN EW 600-2M

KERN EW 1500-2M

KERN EW 3000-2M

KERN EW 6000-1M

EC type approval certificate number: T5026

Issued by: NMI

correspond to the following EC directives:

EC directive

EC directive EMC (about the

electromagnetic compatibility)

Version 90/384/EWG

Version 89/336/EWG

Applied harmonised norms, in particular

EN 45501, EN 50081-1, EN 50082-1

This declaration is only valid with the certificate of conformity by a

notified body.

This declaration ceases its validity at each changing of the above mentioned

apparatus which is not in accordance with KERN.

Date: 20 January 2000 Signature:

Gottl. KERN & Sohn GmbH

Managing Director

Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72322 Balingen-Frommern, Tel. +49-07433/9933-0,Fax +49-07433/9933-149

EW-BA-defsi-0620 23

8 Adjusting (CAL)

8.1 Adjusting for verification

General Information

Prior to the procedure of verification the balance has to be adjusted. See also section

8.2 Adjusting (CAL).

After the successful adjusting it is necessary to make the adjusting possibility

impossible on KERN EW balances. The switch for this step is located on the inside of

the balance (beneath the housing, above the display) (only with models KERN EW).

Blocking / Releasing of the adjusting function

Remark:

The adjusting is only possible when not being blocked by the adjusting switch.

Switch to the right Adjusting function is blocked

After successful adjusting the adjusting has to be blocked

by this position of the switch.

This setting has to be selected before starting to verify.

Switch to the left Adjusting function is released

The balance should be separated from the mains after each operation of the

switches.

After the verification the cap has to be secured by a verification mark against access.

The balance is now prepared for the procedure of verification.

EW-BA-defsi-0620

8.2 Adjusting (CAL)

Adjustment should be carried out with the recommended adjusting weight (see

Chapter 1 „Technical Data“). The adjustment can also be carried out with different

adjusting weights (see table), but not ideal from a metrological point of view.

Model Alternative adjusting weight

EW 150-3M 50 g

EW 600-2M 200 g

EW 1500-2M 500 g

EW 3000-2M 1.000 g

EW 6000-1M 2.000 g

Information concerning the adjusting weights is available at:

http://www.kern-sohn.com

Caution:

With verified balances the possibility of adjusting is made impossible. See section 8.1

Adjusting for verification.

Take account of stable ambient conditions.

A warm-up time of approx. 30 minutes is necessary.

Press Fand hold pressed until CAL appears, then release the key.

Press Tare and hold pressed. Immediately press Fbriefly and then also release

TARE. Display .on 0 briefly flashes.

Do not touch the weighing plate.

Shortly after this in the display appears on F.5

Place the adjusting weight(s) carefully in the centre of the weighing plate.

Display on F.5 flashes and shows briefly the weighing value of the

adjusting weight.

Take down the adjusting weight. The adjusting is completed.

In case of an adjusting error or to interrupt the procedure of adjusting, quit by

pressing S.

Store the adjusting weight next to the balance for daily check on the accuracy of the

balance.

Note:

Please handle the adjusting weight with care. Protect the adjusting weight from

damage and dirt. Have it checked periodically. Store it next to the balance (to

prevent from being mixed up).

EW-BA-defsi-0620 25

9 Operating the balance

9.1 Warm-up time

Optimum weighing results are being achieved when starting to operate the balance

only 5 minutes after turning the balance on.

9.2 Power display

If the symbol (*) is visible, the balance is provided with power via the mains adapter.

By pressing the ON/OFF key the balance is in the weighing mode.

Thus the power display in the balance display no longer is visible.

It is recommended to turn the mains adapter off after having terminated to work with

the balance.

Bar Graph display

The weighing range of the balance is separated in 20 graphic cuboids. If the balance

is not loaded, the zero (0) is displayed in the graphic display. If the balance is loaded

up to the half of its weighing range, 10 graphic cuboids are displayed.

Note:

If the tare weighing is carried out, the graphic weighing display continues to show the

quantity of cuboids of the tare weight.

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