KERN 1500-2M Manuale utente
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
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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).
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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.
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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
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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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