KERN 770-12 Bedienungsanleitung

770/GS/GJ-BA-defsi-0023

E KERN 770/GS/GJ

Version 2.3 04/2000

Operating Instructions

Electronic Precision Balance

Contents

1OPERATING ELEMENTS 69

1.1 IMPORTANT INSTRUCTIONS 75

1.2 GETTING STARTED 76

1.2.1 Installation of the weighing chamber 76

1.2.2 Connecting the Balance to AC Power 78

1.2.3 Safety Precautions 79

1.2.4 Connecting Electronic Peripheral Devices 79

1.2.5 Levelling the Balance Using the Level Indicator 79

1.3 OPERATING THE BALANCE 80

1.3.1 Warm-up Time 80

1.3.2 Turning the Balance On and Off (Standby Mode) 80

1.3.3 Self-Test 80

1.3.4 Taring 81

1.3.5 Simple Weighing (Weight Determination) 81

1.4 ADJUSTING (FORMERLY CALIBRATION) 82

1.4.1 Internal Adjusting for Balances with a Built-in Adjusting Weight 82

1.4.2 External Adjusting 83

1.4.3 Blocking the Adjusting Functions 83

1.5 DATA INTERFACE 84

1.6 BELOW BALANCE WEIGHING 85

1.7 ANTI-THEFT LOCKING DEVICE 85

1.8 TROUBLESHOOTING GUIDE 86

1.9 CARE AND MAINTENANCE 87

1.9.1 Cleaning 87

1.9.2 Safety Inspection 87

2DECLARATIONS OF CONFORMITY 88

3BALANCE OPERATING MENU 90

3.1 CHANGING MENU CODE SETTINGS 90

3.1.1 Accessing the Menu 91

3.1.2 Reset Function - Undoing All Menu Code Changes 92

3.2 BALANCE OPERATING PARAMETERS 93

3.2.1 Adapting the Balance to Ambient Conditions 93

3.2.2 Standard Weighing Mode - Manual Filling Mode 93

3.2.3 Stability Range 93

3.2.4 Tare Parameter 94

3.2.5 Auto Zero Function 94

3.2.6 Adjusting and Linearisation Functions Using CAL 94

3.3 UNIT CONVERSION 95

3.3.1 Weight Units 95

3.4 INTERFACE PARAMETER SETTINGS 96

3.4.1 Baud Rate 96

3.4.2 Parity 96

3.4.3 Number of Stop Bits 96

3.4.4 Handshake Mode 96

3.5 DATA INTERFACE 97

770/GS/GJ-BA-defsi-0023 69

3.5.1 Data Output Parameter 97

3.5.2 Auto Print 97

3.5.3 Data Output at Defined Intervals 98

3.5.4 Automatic Taring after Data Output 98

3.5.5 Data ID Codes 99

3.5.6 Automatic Output of the Tare Memory Data 99

3.6 ADDITIONAL FUNCTIONS 99

4APPLICATION PROGRAMS 100

4.1 TARE MEMORY 100

4.2 PRACTICAL EXAMPLE “NET TOTAL“ 101

4.3 WEIGHING IN PERCENT 102

4.4 PRACTICAL EXAMPLE “DETERMINATION OF THE RESIDUAL WEIGHT IN PERCENT“ 103

4.5 COUNTING 104

4.6 PRACTICAL EXAMPLE “COUNTING SMALL PARTS“ 105

4.7 ANIMAL WEIGHING/AVERAGING 106

4.8 PRACTICAL EXAMPLE “ANIMAL WEIGHING IN THE AUTOMATIC START MODE“ 108

4.9 PRACTICAL EXAMPLE “ANIMAL WEIGHING IN THE MANUAL START MODE“ 109

5ISO/GLP-COMPLIANT PRINTOUT OR RECORD 110

5.1 DATA PRINTOUT/RECORD (ISO/GLP-COMPLIANT) 112

5.2 DATA PRINTOUT/RECORD FOR APPLICATION PROGRAMS (E.G. COUNTING) 113

6INTERFACE DESCRIPTION 114

6.1 GENERAL INFORMATION 114

6.2 INTERFACING DEVICES WITH THE BALANCE 114

6.3 GENERAL SPECIFICATIONS 115

6.4 DATA OUTPUT FORMATS 116

6.5 DATA INPUT FORMATS 120

6.6 SYNCHRONISATION AND DATA OUTPUT PARAMETERS 123

6.7 INTERFACE PARAMETER SETTINGS 126

6.8 PIN ASSIGNMENT CHART 127

7SPECIFICATIONS 129

8SUPPLEMENT - OVERVIEW OF ALL MENU SETTINGS 132

Please read through these installation and operating instructions carefully before

operating your new balance.

After unpacking the balance, please check it immediately for any visible damage as a

result of rough handling during shipment.

If this is the case, proceed as directed in the section entitled "Safety Inspection."

Save the box and all parts of the packaging for any future shipment of your balance.

Before packing your balance, unplug all connected cables to prevent damage.

1 Operating Elements

770/GS/GJ-BA-defsi-0023

KERN 770-12, KERN 770-13, KERN 770-14, KERN 770-15

No. Designation No. Designation

1 Weighing pan 13 Verification ID label with metrological data

2 Shield ring for verified balances approved for use as

3 Metrological ID label for verified balances legal measuring instruments

approved for use as legal measuring 14 AC jack

instruments 15 Manufacturer’s label with the CE mark of

4 Menu access switch conformity

5 Levelling foot 16 Data interface port

6 TARE key 17 Level indicator

7 PRINT key (data output)

8 Function key F

9 CAL key

10 CF key (clear function) Not shown:

11 ON/OFF key Dust cover

12 Weight display Caps and plugs (set)

KERN 770-60

770/GS/GJ-BA-defsi-0023 71

No. Designation No. Designation

1 Weighing pan 12 Weight display

2 Shield disk 13 AC jack

3 Metrological ID label for verified balances 14 Verification ID label with metrological data

approved for use as legal measuring for verified balances approved for use as

instruments legal measuring instruments

4 Access switch 15 Manufacturer’s ID label with the

5 Levelling foot CE

CECE

CE mark of conformity

6 TARE key 16 Data interface port

7 PRINT key (data output) 17 Level indicator

8 CF key (clear function)

9 Function key F

10 CAL key

11 ON/OFF key

770/GS/GJ-BA-defsi-0023

KERN GS / KERN GJ

Pos. Designation Pos. Designation

1 Weighing pan 14 Level indicator

3 Shield ring 15 AC jack

4 Levelling foot 16 Menu access switch

5 Level indicator 17 Data interface port

6 PRINT key (data output) 18 Draft shield cover

7 CF key (clear function) 19 Glass draft shield cylinder

8 Function key F20 Pan support

9 CAL key

10 ON/OFF key

11 Weight display

12 Manufacturer’s ID label with the

CECE

CE mark of conformity

13 Lug for attaching an anti-theft locking Not shown:

device Caps and plugs (set)

770/GS/GJ-BA-defsi-0023 73

KERN GS / KERN GJ

Pos. Designation Pos. Designation

1 Weighing pan 12

Manufacturer’s ID label with the CE

CECE

CE mark

3 Shield ring of conformity

4 Levelling foot 13 Lug for attaching an anti-theft locking

5 TARE keys device

6 PRINT key (data output) 14 Level indicator

7 CF key (clear function) 15 AC jack

8 Function key F16 Menu access switch

9 CAL key 17 Data interface port

10 ON/OFF key 20 Pan support

11 Weight display

Not shown:

Caps and plugs (set)

770/GS/GJ-BA-defsi-0023

KERN GS / KERN GJ

Pos. Designation Pos. Designation

1 Weighing pan 12

Manufacturer’s ID label with the CE

CECE

CE mark

4 Levelling foot of conformity

5 TARE key 13 Lug for attaching an anti-theft locking

6 PRINT key (data output) device

7 CF key (clear function) 14 Level indicator

8 Function key F15 AC jack

9 CAL key 16 Menu access switch

10 ON/OFF key 17 Data interface port

11 Weight display 21 Shock absorber

Not shown

Caps and plugs (set)

770/GS/GJ-BA-defsi-0023 75

1.1 Important Instructions

Ambient Conditions

The KERN 770, GS and GJ balances are designed to

provide reliable weighing results under normal ambient

conditions in the laboratory and in industry. When choosing

a location to set up your balance, observe the following so

that you will be able to work with added speed and

accuracy:

- Set up the balance on a stable, even surface (benchtop

or floor);

- Avoid placing the balance in close proximity to a heater

or otherwise exposing the balance to extreme heat or to

direct sunlight;

- Protect the balance from drafts that come from open

windows and doors;

- Avoid exposing the balance to extreme vibrations during

weighing;

- Protect the balance from aggressive chemical vapours;

- Do not operate the balance in a hazardous

area/location.

Do not expose the balance to extreme moisture over long

periods. Moisture in the air can condense on the surface of

a cold balance whenever it is brought to a substantially

warmer place. If you transfer the balance to a warmer area,

make sure to condition it for about 2 hours at room

temperature, leaving it unplugged from AC power.

Afterwards, if you keep the balance connected to AC power,

the continuous positive difference in temperature between

the inside of the balance and the outside will practically rule

out the effects of moisture condensation.

Do avoid electric and magnetic fields around the balance.

Do check the balance with test weights at least once a day.

Balance’s opening causes invalidity of warranty !

770/GS/GJ-BA-defsi-0023

1.2 Getting started

Remove the plastic sheeting, adhesive tapes and foam material from the balance.

Important information:

Control Seals on Verified Balances Approved for Use as Legal Measuring

Instruments in the EU*:

Legal regulations require the verified balance to be sealed. This control seal consists

of an adhesive label with the name „KERN“ on it. This seal will be irreparably

damaged if you attempt to remove it. In this case, the validity of the seal becomes

void and you must have your balance re-verified.

For model 770-60

Connecting the Balance to the Electronics Box.

- Plug the cable into the socket of the electronics box

1.2.1 Installation of the weighing chamber

For models 770

Place the components listed below inside the chamber in

the order given:

- Shield ring

- Weighing pan

For models GS/GJ with a glass draft shield

- Place the shield disk on the balance. Turn the disk

counter-clockwise until it stops and is secured.

Place the components listed below on the balance in the

order given:

- Pan support

- Weighing pan

- Glass draft shield cylinder

- Draft shield cover

770/GS/GJ-BA-defsi-0023 77

For models GS/GJ with a rectangular weighing pan

- Place the weighing pan on the balance

For models GS/GJ with a round weighing pan

Place the shield disk on the balance. Turn the disk

counter-clockwise until it stops and is secured.

Place the components listed below on the balance in the

order given:

- Pan support

- Weighing pan

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