EWJ 6000-1SM - Scale Kern - Free user manual and instructions

USER MANUAL EWJ 6000-1SM Kern

Digital laboratory balance scale with digital display and control buttons (no visible text or symbols on the device itself)

Further language versions you will find online under www.kern-sohn.com/manuals

Front view of a laboratory balance with labeled ports (7, 8, 9) and an internal device (no text or symbols on the device body)

Front view of a laboratory balance with labeled ports (7, 8, 9) and internal components (no text or symbols on the device itself)

6.8 Eichung

Allgemeines:

7.2 Ausschalten

7.4 Einfaches Wägen

Stabil / Brutto	ST,GS: 50.00g
Stabil / Netto	ST,NT: 50.0g
Instabil / Brutto	UT,GS: 50.00g
Instabil / Netto	UT,NT: 50.0g

3.4 Monitoring of Test Resources.... 12

4 Basic Safety Precautions.... 12

4.1 Pay attention to the instructions in the Operation Manual.... 12

4.2 Personnel training.... 12

5 Transport and storage.... 12

5.1 Testing upon acceptance 12

5.2 Packaging / return transport 12

6 Unpacking, Setup and Commissioning 13

6.1 Installation Site, Location of Use 13

6.2 Unpacking, Scope of delivery 13

6.2.1 Scope of delivery / serial accessories: 13

6.2.2 Installing / removing transport fittings.... 14

6.3 Mains connection.... 18

6.4 Storage battery operation (optional) 18

6.5 Connection of peripheral devices....18

6.6 Initial Commissioning....18

6.7 Adjustment....19

6.7.1 Manual internal adjustment by pressing button.... 19

6.7.2 Automatic internal adjustment 20

6.8 Verification....21

7 Operation....22

7.1 Start-up 22

7.2 Switching Off 22

7.3 Zeroing....22

7.6 Percent determination 23

7.7 Parts counting.... 24

7.8 Manual totalizing....25

7.9 Automatic adding-up....28

8 Menu 30

8.1 Navigation in the menu....30

8.2 Access to technology menu.... 31

8.3 Overview....32

9 Interfaces.... 35

9.1 Technical data 35

9.2 Printer operation (RS 232).... 36

9.3 Output log (continuous output) 37

10 Servicing, maintenance, disposal 37
10.1 Clean 37
10.2 Servicing, maintenance 37
10.3 Disposal 37
11 Error messages.... 38
12 Instant help.... 39
13 Declaration of conformity 40

1 Technical data

KERN	EWJ 300-3	EWJ 300-3H	EWJ 3000-2
Readability (d)	0.001 g	0.001 g	0.01 g
Weighing range (max)	300 g	300 g	3000 g
Reproducibility	0.001g	0.001g	0.02 g
Linearity	±0.003 g	±0.003 g	±0.05 g
Smallest part weight for piece counting	2 mg	2 mg	20 mg
Reference quantities at piece counting	10, 20, 50, 100, 200
Weighing Units	g, ct, dwt, lb, mo, oz, ozt, tl (HK), tl (Singap., Malays), tl (Tw)
Adjustment	internal
Warm-up time	2 hours
Stabilization time (typical)	3 sec.
Operating temperature	+ 5°C .... + 40°C
Humidity of air	max. 80 % (not condensing)
Dimensions, completely assembled (wind shield) (W x D x H) mm	220 x 315 x 180	220 x 315 x 321	220 x 315 x 180
Dimensions of the housing (B x D x H) mm	220 x 315 x 95
Dimensions of windshield inside (B x D x H) mm	145 x 160 x 80	155 x 175 x 217	-
Dimensions of windshield outside (B x D x H) mm	158 x 143 x 82	180 x 191 x 230	-
Weighing plate, stainless steel (mm)	∅ 80		∅ 120
Weight kg (net)	2200 g	2560 g	2900 g
Input voltage balance	12 V / 2500 mA
Rechargeable battery (optional)	Service life – background illumination ON 10 h
	Operating time – background illumination OFF 15
	Loading time 4h
Interfaces	RS-232
	USB
KERN	EWJ 600-2M	EWJ 600-2SM
Readability (d)	0.01 g	0,01 g
Weighing range (max)	600 g	600 g
Reproducibility	0.01 g	0,01 g
Linearity	± 0,03 g	± 0,03 g
Verification value (e)	100 mg	100 mg
Verification class	II	II
Minimum weight (min)	500 mg	500 mg
Smallest part weight for piece counting	20 mg 20 mg
Reference quantities at piece counting	10, 20, 50, 100, 200
Weighing unit	g	g
Adjustment	internal
Warm-up time	2 hours	2 hours
Stabilization time (typical)	3 sec.
Operating temperature	+ 5°C .... + 40°C
Humidity of air	max. 80 % (not condensing)
Dimensions fully mounted (wind shield) (W x D x H) mm	220 x 315 x 180	220 x 315 x 180
Dimensions of the housing (B x D x H) (mm)	220 x 315 x 95
Dimensions of windshield inside (B x D x H) mm	145 x 160 x 80	145 x 160 x 80-
Dimensions of windshield outside (B x D x H) mm	158 x 143 x 82	158 x 143 x 82
Weighing plate, stainless steel (mm)	∅ 120	∅ 120
Weight kg (net)	2560 g	2560 g
Input voltage balance	12 V / 2500 mA
Rechargeable battery (optional)	Service life – background illumination ON 10 h
	Operating time – background illumination OFF 15
	Loading time 4h
Interfaces	RS-232	-
	USB	-
KERN	EWJ 6000-1M	EWJ 6000-1SM
Readability (d)	0.1 g	0,1 g
Weighing range (max)	6000 g	6000 g
Reproducibility	0.1 g	0,1 g
Linearity ± 0.3 g ± 0,3 g
Verification value (e) 1 g 1 g
Verification class	II	II
Minimum weight (min)	5 g	5 g
Smallest part weight for piece counting	20 mg	20 mg
Reference quantities at piece counting	10, 20, 50, 100, 200
Weighing unit	g	g
Adjustment	internal
Warm-up time	2 hours	2 hours
Stabilization time (typical)	3 sec.
Operating temperature	+ 5°C .... + 40°C
Humidity of air	max. 80% (not condensing)
Dimensions fully mounted (wind shield) (W x D x H) mm	-	-
Dimensions of the housing (B x D x H) (mm)	220 x 315 x 95
Dimensions of windshield inside (B x D x H) mm	-	-
Dimensions of windshield outside (B x D x H) mm	-	-
Weighing plate, stainless steel (mm)	155 x 145	155 x 145
Weight kg (net)	2900 g	2900 g
Input voltage balance	12 V / 2500 mA
Rechargeable battery (optional)	Service life – background illumination ON 10 h
	Operating time – background illumination OFF 15
	Loading time 4h
Interfaces	RS-232	-
	USB -

2 Appliance overview

Example EWJ 300-3 / EWJ 600-2M:

Front view of a laboratory balance with labeled ports (7, 8, 9) and an internal device (no text or symbols on the device body)

1. Windshield
2. Weighing pan
3. Levelling screw
4. Bubble level
5. Keyboard
6. Display
7. RS-232
8. USB
9. Terminal power supply unit
10. Battery compartment
11. Transportation locks
12. Adjustment switch

Example EWJ 300-3H:

Front view of a laboratory balance with labeled ports (7, 8, 9) and internal components (no text or symbols on the device itself)

1. Windshield
2. Weighing pan
3. Display
4. Bubble level
5. Keyboard
6. Levelling screw
7. RS-232
8. USB
9. Terminal power supply unit
10. Battery compartment
11. Transportation locks
12. Adjustment switch

2.1 Keyboard overview

Key Function Function in Menu
	Calculate weighing data via interface	Exit menu / back to weighing mode.
	Switch-over weighing unit	Scroll forward in menu
	Parts countingDelete total added memory
	Percent determinationStart internal adjustment (longer pressing of the button)
	Taring
	Zeroing	Take over selected setting
	Turn on/off

2.2 Overview of display

→0←	Zero indicator
→T←	The displayed weighing value is a net weighing value
0000100010001000F	Capacity displayThe bar graph display moves from the left to the right and proceeds equally to the weight loaded onto the weighing balance. Its full width is reached at maximum load.This is an analogue display of the current allocation of the weighing area.
o	Stability display
Pcs Indicator for counting
% Indicator for percent determination
mom kg t#t	Currently selected weight unit
fully loaded	Loading status of the rechargeable battery (prerequisite menu setting „P9batt on“, see chap. 8.2).The number of segments informs about the loading status of the rechargeable battery.
1/2 loaded
empty

3 Basic Information (General)

3.1 Proper 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 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 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 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 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

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 glass wind screen, the weighing platform, power unit etc. against shifting and damage.

6 Unpacking, Setup and Commissioning

6.1 Installation 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.

6.2 Unpacking, Scope of delivery

Remove device and accessories carefully from packaging, remove packaging material and place device at the planned work place. Verify that there has been no damage and that all packing items are present.

6.2.1 Scope of delivery / serial accessories:

• Balance, see chap. 2
- Mains adapter
- Protective cover
- Operating manual
- Transport Securing
- Glass wind shield only models EWJ 300-3, EWJ 300-3H, EWJ 600-2M, EWJ 600-2SM

6.2.2 Installing / removing transport fittings

The right place is decisive for the accuracy of the weighing results of high-resolution precision balances (see chap. 6.1).

→ Turn the screw to the stop to the left

→ Install weighing plate and wind shield if necessary.

Install weighing plate as follows:

Models EWJ-300:

Put holder weighing plate
Screw screw with hexagon socket carefully and fix holder weighing plate so
Attach the weighing plate

Models EWJ-600-2M\_EWJ-3000-2

Put holder weighing plate
Screw screw with hexagon socket carefully and fix holder weighing plate so
Attach the weighing plate

Models EWJ-6000:

Attach the weighing plate
Ensure that the slanted side faces forward
Screw screw with hexagon socket carefully and fix pan so

⇒ Level balance with foot screws until the air bubble of the water balance is in the prescribed circle.

→ Check levelling regularly

6.3 Mains connection

Power is supplied via the external mains adapter. The stated voltage value must be the same as the local voltage.

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

6.4 Storage battery operation (optional)

Before the first use, the battery should be charged by connecting it to the mains power supply for at least 12 hours.

The LED display provides information about the battery's charging status.

Voltage has dropped below prescribed minimum.

Rechargeable battery very low.

Rechargeable battery completely reloaded

To spare the rechargeable battery the permanent background illumination of the display can be switched off in the menu item „F2 bl“, see chapter 8.2.

6.5 Connection of peripheral devices

Before connecting or disconnecting of additional devices (printer, PC) to the data interface, always disconnect the balance from the power supply.

With your balance, only use accessories and peripheral devices by KERN, as they are ideally tuned to your balance.

6.6 Initial Commissioning

In order to obtain exact results with the electronic balances, your balance must have reached the operating temperature (see warming up time chap. 1). During this warming up time the balance must be connected to the power supply (mains, accumulator or battery).

The accuracy of the balance depends on the local acceleration of gravity.

Strictly observe hints in chapter Adjustment.

6.7 Adjustment

As the acceleration value due to gravity is not the same at every location on earth, each display unit with connected weighing plate must be coordinated - in compliance with the underlying physical weighing principle - to the existing acceleration due to gravity at its place of location (only if the weighing system has not already been adjusted to the location in the factory). This adjustment process must be carried out for the first commissioning, after each change of location as well as in case of fluctuating environment temperature. To receive accurate measuring values it is also recommended to adjust the display unit periodically in weighing operation.

- Observe stable environmental conditions. Stabilisation requires a certain warm-up time.

6.7.1 Manual internal adjustment by pressing button

⇒ In weighing mode keep ⚠% pressed as long as „CAL“ is displayed

≡CAL≡

⇒ The motor noise of the loading system for the internal adjustment weight can be heard, the internal adjustment is started.

After successful adjustment „PASS“ will be displayed. The balance returns automatically into weighing mode.

6.7.2 Automatic internal adjustment

Automatic adjustment takes place:

• when the balance is switched off and on.
• at the end of a time interval

After a set time interval (selectable 1 – 8 hrs.) in the menu (F5 HoUr, see chap. 8.3) the internal adjustment is automatically started.

⇒ The motor noise of the loading system for the internal adjustment weight can be heard, the internal adjustment is started.

After successful adjustment „PASS“ will be displayed. The balance returns automatically into weighing mode.

6.8 Verification

General introduction:

According to EU directive 2014/31/EU balances must be officially verified if they are used as follows (legally controlled area):

a) For commercial transactions if the price of goods is determined by weighing. b) For the production of medicines in pharmacies as well as for analyses in the medical and pharmaceutical laboratory.
c) For official purposes
d) For manufacturing final packages

In cases of doubt, please contact your local trade in standard.

Verification notes:

An EU type approval exists for balances described in their technical data as verifiable. If a balance is used where obligation to verify exists as described above, it must be verified and re-verified at regular intervals.

Re-verification of a balance is carried out according to the respective national regulations. The validity for verification of balances in Germany is e.g. 2 years.

The legal regulation of the country where the balance is used must be observed!

Verification of the balance is invalid without the seal.

The seal marks attached on balances with type approval point out that the balance may only be opened and serviced by trained and authorised specialist staff. If the seal mark is destroyed, verification looses its validity. Please observe all national laws and legal regulations. In Germany a re-verification will be necessary.

Position of seals and adjusting switch:

1. Self-destroying seal mark
2. Plastic disk to cover the adjustment switch
3. Adjustment switch
4. Lead
5. Wire
6. Housing screw

7 Operation

7.1 Start-up

→ Press

The display is shining and the motor noise of the loading system for the internal adjustment weight can be heard.

The balance carries out a selftest, the maximum load and software version will also be shortly displayed, followed by the internal adjustment. During this process „CAL“ appears in the display.

As soon as the weight display appears, the balance is ready for weighing.

7.2 Switching Off

→ Press

the display will disappear.

7.3 Zeroing

Resetting to zero corrects the influence of light soiling on the weighing plate.

→ Unload the balance
→ Press →0←

and zero display as well as indicator 0 will appear.

7.4 Simple weighing

→ Place goods to be weighed on balance.
→ Wait for stability display ☐
→ Read weighing result.

Overload warning

Overloading exceeding the stated maximum load (max) of the device, minus a possibly existing tare load, must be strictly avoided. This could damage the instrument.

Exceeding maximum load is indicated by the display of „----“ and an audio sound. Unload weighing system or reduce preload.

7.5 Weighing with tare

⇒ Deposit empty weighing container. Wait for stability display, then press TARE. Zero display appears. The weight of the container is now internally saved.
→ Weigh the material, the net weight will be indicated.

• The balance is able to only store one taring value at a time.
• When the balance is unloaded the saved taring value is displayed with negative sign.
• To delete the stored tare value remove load form the weighing plate and press TARE
• The taring process can be repeated any number of times, e.g. when adding several components for a mixture (adding). The limit is reached when the taring range capacity is full.

7.6 Percent determination

Percent weighing allows to display weight in percent, in relation to a reference weight.

Put the nominal weight

→ Place the nominal weight (reference weight which corresponds to 100 %).
⇒ Wait for stability display, then press ⚠%. 100% is displayed.

Percent weighing /commutation

→ Place goods to be weighed on balance.
The weight of the item to be weighed is displayed in percent, with reference to the nominal weight.
⇒ Press %, the weight of the item to be weighed is displayed in the current weighing unit e.g. gram.

7.7 Parts counting

Before the balance can count parts, it must know the average part weight (i.e. reference). Proceed by putting on a certain number of the parts to be counted. The balance determines the total weight and divides it by the number of parts, the so-called reference quantity. Counting is then carried out on the basis of the calculated average piece weight.

As a rule:

The higher the reference quantity the higher the counting exactness.

Set reference

⇒ Press PCS, the current reference quantity (e.g. 10) and the indicator Pcs are displayed.

⇒ Use MODE to set the desired reference quantity (e.g. 100), selectable SP 10, SP 20, SP 50, SP100, SP 200.

Place as many items to be counted (such as 100 items) as demanded by the set reference quantity and confirm by 0 . The weighing scales calculate the reference weight. The current quantity (such as 100 items) will be displayed.

→ Remove reference weight. The balance is from now in parts counting mode counting all units on the weighing plate.

Switching over between quantity and weight display

→ Place load on pan and read the number of pieces.
⇒ Press PCS, the weight will be displayed.

7.8 Manual totalizing

With this function the individual weighing values are added into the summation

memory by pressing PRINT CSG and edited, when an optional printer is connected.

The totalizing function is active at menu setting

• For menu settings, see chapter 8.2:

- The totalizing function is not active when the weight is under 20d.

Add up:

→ Place item to be weighed A, e.g. 100 g.

Wait for stability display, then press the weight value will be saved and printed if an optional printer is connected. The number of weighings, followed by the total weight will be indicated.

→ Remove the weighed good. More weighed goods can only be added when the display ≤ zero.

→

→ Place item to be weighed B, e.g. 200 g.

Wait for stability display, then press the weight value will be added to the summation memory and edited. Number of weighings, followed by the total weight will be displayed for 2 sec. After that the current weighing value is displayed.

→ Add more weighed goods as described before.

Please note that the weighing system must be unloaded between the individual weighing procedures.

This process may be repeated 99 times or till such time as the capacity of the weighing system has been exhausted.

Display and output sum „Total“:

When the balance is unloaded (zero display) press, the number of weighings, followed by the total weight will be shown for 2 sec and printed if an optional printer is connected.

Delete total added memory:

When display „Sum „Total“ appears, press PCS. The data in the summation memory are deleted.

Printout example (KERN YKB-01N):

1: 100.00 g

G: 100.00 g

2: 200.00 g

G: 200.00 g

1-2: 300.00 g

First weighing

Second weighing

Total of weighing processes 1 - 2

7.9 Automatic adding-up

With this function the individual weighing values are automatically added into the summation memory when the balance is unloaded without pressing 21-d edited, when an optional printer is connected.

The totalizing function is active at menu setting „SALE-Mode no“, see chap. 8.2.

• Menu settings, chap. 8.2: „F3 COM“ ⇒ „S 232 ⇒ „P AUto“ „SALE n“
• The totalizing function is not active when the weight is under 20d.

Add up:

→ Place item to be weighed A, e.g. 100 g.

After stabilisation control has taken place, you will hear an audio sound.

→ Remove the weighed good. The weighing value is added to the summation memory and printed if an optional printer is connected.

→ More weighed goods can only be added when the display ≤ zero.
Place item to be weighed B, e.g. 200 g. After stabilisation control has taken place, you will hear an audio sound.

→ Remove the weighed good. The weighing value is added to the summation memory and printed if an optional printer is connected. Number of weighings, followed by the total weight will be displayed for 2 sec.

→ Add more weighed goods as described before.

Please note that the weighing system must be unloaded between the individual weighing procedures.

This process may be repeated 99 times or till such time as the capacity of the weighing system has been exhausted.

Display and delete the weighing data, as well as printout examples see chap. 7.9.

8 Menu

8.1 Navigation in the menu

Call up menu	Switch-on balance and during the selftest press .The first menu item „F1 Unt,, is displayed.
Select menu item	With help of , the individual menu items can be selected one after the other.
Select setting	Confirm selected menu item by pressing . The current setting will be displayed.
Change settings	Switch into the available settings using
Acknowledge setting / exit the menu	Either save by pressing or cancel by pressing
Return to weighing mode	Press . eatedly to exit menu.

8.2 Access to technology menu

The access to the technology menu „tECH“ is locked by the key combination

When on balances with type approval „tECH“ is displayed, the seal mark must be destroyed and the adjustment switch be actuated. Position of adjustment switch see chap. 6.11

Attention:

After destruction of the seal the balance must be re-verified by an authorised agency and a new verification wire/seal mark fitted before it can be reused for applications subject to verification.

graph TD
    A["Unit"] --> B["MODE"]
    B --> C["TECH"]
    C --> D["→0←"]
    D --> E["Pin"]
    E --> F["PCS"]
    E --> G["PRINT ESC"]
    E --> H["TARE"]
    F --> I["Pin_'"]
    G --> J["Pin_Ln"]
    H --> J

8.3 Overview

Factory settings are marked by *.

Menu block	Menu item		Available settings / explanation
F1 Unt Weighing Units	Not documented
F2 bl Display background illumination	EL AU*		Automatic background illumination on when weighing pate is loaded or key pressed.
	EL on		Background lighting of display is switched on permanently
	EO OFF Display back		background illumination off
F3 Com Interface parameter	S 232 S USb	Use to select interface: RS232 or USB
		P Prt*	• Output of a stable weighing value after pressing of • Manual totalizing (menu setting „ SALE no “), see chap. 7.9.Press the weighing value will be added to the summation memory and issued.
		P Cont	Continuous data output see chap. 9.3
		P AUto	For automatic add-up see chap. 7.10.This function is used to issue and add individual weighing values automatically to the summation memory on unloading of weighing scale.(menu setting „ SALE no “)
		wirel	Not documented
		P ASK	Remote control instructions
			Command	Function
			S	Stable weighing value for the weight is sent via the interface
			W	Weighing value for the weight (stable or unstable) is sent via the interface
			T	No data are sent, the balance carries out the tare function.
			Z	No data are sent, the zero-display appears.
			P	Quantity will be sent via the interface
	Acknowledge selection by →0←
	b600 ↓ b 9600*		Baud rate 600, 1200, 2400, 4800, 9600 selectable.
	Acknowledge selection by →0←

		tP Sta	Standard printer setting
		LP 50	Not documented
		Acknowledge selection by
		Eng*	Standard stetting English.only displayed for setting „LP 50“
		chi	Not documented
F4 SPDDisplay speed	SPd L	Verifiable models:“Low”		Non-verifiable models:SPd 1
	SPdn	“Normal”		SPd 2
	SPd H	“High”		SPd 3
	SPd 4
F5 HoUr	oFF	Automatic adjustment switched off
	1 HoUr↓8 HoUr	Time interval after which the automatic adjustment starts, selectable 1, 2, 3,4, 5, 6, 7, 8 hours.
P6 bAtt	bAttoF	Mask loading status display „Recharg.battery“
	bAtton	Display loading status display „Recharg.battery“
SALE m	SALEN	Sale mode no: d= 0.1g
		EWJ 300-3:d= 0.001 g	EWJ 600-2M:d= 0.01 g		EWJ 6000-1M:d= 0.1 g
	SALE y	Sale mode yes: d= 0.01 g
		EWJ 300-3:d= 0.01 g	EWJ 600-2M:d= 0.1 g		EWJ 6000-1M:d= 1 g
[4x66] The SALE mode is locked for balances with type approval.To disable the access lock, destroy the seal and actuate the adjustment switch. Position of the adjustment switch see chap. 6.11Attention:After destruction of the seal the balance must be re-verified by an authorised agency and a new verification wire/seal mark fitted before it can be reused for applications subject to verification.

	Technology menu, see chap. 8.2At „Pin“ display pressPCS, Print ESC, TARE, subsequently the first menu block „P1 Lin“ will be displayed.
P1 Lin Linearisation	(not documented)
P2 CAL	Adjustment (not documented)
P3 Cnt	XXXXXX	Display internal resolution
P4 A 2n	A2 oFF	Automatic zero point correction switched off
	A2n0.5d	Automatic zero point correction (Autozero) by changing the display, digits selectable (0.5d, 1d, 2d, 4d)
	A2n 1d
	A2n 2d*
	A2n 4d
P5 GrA	XXXXXX	Local gravitational constant (not documented)
P6 CAP	XXXX Capacity (max)

9 Interfaces

(except models EWJ-SM)

Via the interfaces weighing data may be exchanged with connected peripheral devices.

RS 232 interface	USB interface for PC connection
For menu settings, see chapter 8.2: „F3 COM“ ⇒ „S 232“	For menu settings, see chapter 8.2: „F3 COM“ ⇒ „USB“
Suitable peripheral devices:• Printer• PC	Suitable peripheral devices:• PCOn the PC a virtual COM-Port is installed, which is recognized and triggered by the PC software (e.g. KERN balance connection).
i We recommend the USB interface set KERN DBS A02 (scope of supply: USB cable, driver CD, software balance connection.)For further information please go to KERN-Homepage (www.kern-sohn.com).

The following conditions must be met to provide successful communication between the weighing balance and the peripheral devices.

- Connect balance using a suitable cable with the interface of the peripheral device. Faultless operation requires an adequate KERN interface cable.

- Communication parameters (baud rate, bits and parity) of balance and peripheral device must match.

9.1 Technical data

Connection (RS 232) 9 pin d-subminiature bushing

Pin 2 input

Pin 3 output

Pin 5 signal earth

Baud rate Optional 600/1200/2400/4800/9600

Parity 8 bits, no parity

9.2 Printer operation (RS 232)

Printout examples (KERN YKB-01N):

1. Menu setting F3 COM „P Prt“

Gross weight	G	300.00g
Net weight	N:	100.0g
Percent determination	PERC:	50.01 %
Parts counting PCS		20PCS
	UW:	5.00027g
	G	100g
Totalization	1:	49.99g
	G	49.99g
	1:	49.99g
	G	49.99g
	3:	149.99g
	G	149.99g
	1-3	299.97g

1. Menu setting F3 COM „P Cont“

stable / gross	ST,GS: 50.00g
stable / net	ST,NT: 50.0g
unstable / gross	UT,GS: 50.00g
unstable / net	UT,NT: 50.0g

Weighing values ≤ zero are not edited via the interface.

9.3 Output log (continuous output)

,

/ -

k

g

CR

LF

-HEADER1-

-HEADER2-

-WEIGHT-

-WEIGHT UNIT-

HEADER1: ST = stable, US = instable

HEADER2: NT = net, GS = gross

10 Servicing, maintenance, disposal

Before any maintenance, cleaning and repair work disconnect the appliance from the operating voltage.

10.1 Clean

Please do not use aggressive cleaning agents (solvents or similar agents), but a cloth dampened with mild soap suds. Ensure that no liquid penetrates into the device. Polish with a dry soft cloth.

Loose residue sample/powder can be removed carefully with a brush or manual vacuum cleaner.

Spilled weighing goods must be removed immediately.

10.2 Servicing, maintenance

The appliance may only be opened by trained service technicians who are authorized by KERN.
→ Before opening, disconnect from power supply.

10.3 Disposal

Disposal of packaging and appliance must be carried out by operator according to valid national or regional law of the location where the appliance is used.

11 Error messages

Error message	Description Possible causes	/Remedy error
Err lo	Too small calibration weight	Check calibration weight and calibrate again
Err hi	Too big calibration weight
Err 3 Calibration error
Err 4	Resetting range error	Resetting range exceeding when switched onReduce load of the weighing scale plate
Err 6	Value of the analog-to-digital converter	Reduce load of the weighing scale plateCheck if the weighing scale plate is placed correctlyCheck if the load cell is connected correctly
Err 7	Error of percentage weighing	Reference weight when determining percentage weight must be >0.5 d
Err 19 Zero point drift		Remove additional preloads (vessels). Adjustment of weighing scale
Err E	EPROM memory error	Check EPROM memory
----	Maximum load exceeded	Reduce the weight or reduce load of the weighing scale plate

12 Instant help

In case of an error in the program process, briefly turn off the balance and disconnect from power supply. The weighing process must then be restarted from the beginning.

Help:

Fault Possible cause

The displayed weight does not glow.

• The balance is not switched on.
• The mains supply connection has been interrupted (mains cable not plugged in/faulty).
  • Power supply interrupted.

The displayed weight is permanently changing

• Draught/air movement
  • Table/floor vibrations
• Weighing pan has contact with other objects.
• Electromagnetic fields / static charging (choose different location/switch off interfering device if possible)

The weighing result is obviously incorrect

• The display of the balance is not at zero
- Adjustment is no longer correct.
• The balance is on an uneven surface.
• Great fluctuations in temperature.
• Warm-up time was ignored.
- Electromagnetic fields / static charging (choose different location/switch off interfering device if possible)

Should other error messages occur, switch balance off and then on again. If the error message remains inform manufacturer.

13 Declaration of conformity

To view the current EC/EU Declaration of Conformity go to:

www.kern-sohn.com/ce

i The scope of delivery for verified weighing balances (= conformity-rated weighing balances) includes a Declaration of Conformity.

KERN EWJ

Version 1.7 2019-06

Front view of a digital laboratory balance with labeled ports (7, 8, 9) and an internal chamber (no text or symbols beyond labels)

Front view of a laboratory balance with labeled ports (7, 8, 9) and internal components (no text or symbols on the device itself)

6.8 Etalonnage

Généralités:

7.4 Pesage simple

Avertissement surcharge

→

stable / brut	ST,GS: 50.00g
stable / net	ST,NT: 50.0g
instable / brut	UT,GS: 50.00g
instable / net	UT,NT: 50.0g

HEADER1: ST = Stable, US = Instable

HEADER2: NT = Net, GS = Brut