KERN & SOHN ALJ 310-4A User Manual
KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating Manual
Analytical and precision balances
KERN ALJ/ALS/PLJ/PLS
Version 3.8
08/2013
GB
ALJ/ALS/PLJ/PLS-BA-e-1338
2
GB
KERN ALJ/ALS/PLJ/PLS
Version 3.8 08/2013
Operating Manual
Analytical and precision balances
Table of Contents
1 Technical Data ............................................................................................... 4
2 Explanation of graphical symbols .............................................................. 17
3 Basic Information (General) ........................................................................ 17
3.1 Proper use ................................................................................................................17
3.2 Improper Use ............................................................................................................17
3.3 Warranty ...................................................................................................................17
3.4 Monitoring of Test Resources ...................................................................................17
4 Basic Safety Precautions ............................................................................ 18
4.1 Pay attention to the instructions in the Operation Manual .........................................18
4.2 Personnel training .....................................................................................................18
5 Transportation & Storage ............................................................................ 18
5.1 Testing upon acceptance ..........................................................................................18
5.2 Packaging / return transport ......................................................................................19
6 Unpacking, Setup and Commissioning ..................................................... 21
6.1 Installation Site, Location of Use ...............................................................................21
6.2 Unpacking / placing ..................................................................................................21
6.2.1 Placing ...................................................................................................................................... 22
6.2.2 Scope of delivery / serial accessories ...................................................................................... 24
6.3 Appliance overview ...................................................................................................24
6.3.1 Front side of the balance .......................................................................................................... 24
6.3.2 Back and bottom side of the balance ....................................................................................... 25
6.4 Controls ....................................................................................................................26
6.4.1 Overview of display .................................................................................................................. 26
6.4.2 Keyboard overview ................................................................................................................... 26
6.5 Connect and switch-on power supply ........................................................................27
6.6 Rechargeable battery operation (depends on model, see chp.1) ..............................27
6.7 Connection of peripheral devices ..............................................................................28
6.8 Initial Commissioning ................................................................................................28
6.8.1 Stability display ......................................................................................................................... 28
6.8.2 Balance zero display ................................................................................................................ 28
7 Adjustment ................................................................................................... 28
7.1 Models with external weight (KERN ALS/PLS)..........................................................29
7.1.1 Adjustment with recommended adjustment weight (factory setting) ........................................ 29
7.1.2 Adjustment with weights of other nominal values .................................................................... 30
7.2 Models with internal weight (KERN ALJ/PLJ) ............................................................32
7.2.1 Adjustment models PLJ-M ....................................................................................................... 33
7.2.2 Overwrite internal adjustment weight ....................................................................................... 34
7.3 Verification ................................................................................................................35
ALJ/ALS/PLJ/PLS-BA-e-1338
8 Basic Operation ........................................................................................... 36
8.1 Underfloor weighing ..................................................................................................37
9 User menu .................................................................................................... 38
9.1 Weighing unit ............................................................................................................43
9.2 Data output type .......................................................................................................44
9.3 Baud rate ..................................................................................................................45
9.4 Auto Zero ..................................................................................................................46
9.5 Filter .........................................................................................................................48
9.6 Standstill control display ...........................................................................................49
9.7 Setting the contrast of the display .............................................................................50
9.8 Display background illumination ................................................................................51
9.9 Automatic switch-off function „AUTO OFF“ in stand-by mode ...................................52
10 User menu .................................................................................................... 53
10.1 Parts counting ...........................................................................................................54
10.1.1 Switching over between quantity and weight display ........................................................... 56
10.1.2 Automatic reference optimization ......................................................................................... 56
10.1.3 Numeric entering of the reference weight ............................................................................ 57
10.2 Density determination (Hydrostatic weighing) ...........................................................58
10.2.1 Density determination of solids ............................................................................................ 58
10.2.2 Determining density of liquids .............................................................................................. 60
10.3 Adding function .........................................................................................................62
10.4 Checkweighing .........................................................................................................64
10.5 Percent determination ...............................................................................................66
10.5.1 Entering the reference weight by weighing .......................................................................... 66
10.5.2 Numeric entering of the reference weight ............................................................................ 67
10.6 Animal weighing function ..........................................................................................68
10.7 Peak value function ..................................................................................................69
11 Data output RS 232C ................................................................................... 70
11.1 Technical Data ..........................................................................................................70
11.2 Pin allocation of balance output plug .........................................................................70
11.3 Interface....................................................................................................................71
11.4 Data transfer .............................................................................................................71
11.5 Format for data transmission ....................................................................................72
11.6 Remote control instructions.......................................................................................74
11.7 Printer mode .............................................................................................................74
12 Error messages ............................................................................................ 76
13 Service, maintenance, disposal .................................................................. 76
13.1 Cleaning ...................................................................................................................76
13.2 Service, maintenance ...............................................................................................76
13.3 Disposal .................................................................................................................... 76
14 Instant help ................................................................................................... 77
15 Declaration of Conformity ........................................................................... 78
ALJ/ALS/PLJ/PLS-BA-e-1338 3
4
1 Technical Data
KERN
ALJ 160-4A
ALJ 250-4A
ALJ 310-4A
Weighing range (max)
160 g
250 g
310 g
Readability (d)
0.1 mg
0.1 mg
0.1 mg
Reproducibility
0.1 mg
0.1 mg
0.1 mg
Linearity
± 0.3 mg
± 0.3 mg
± 0.3 mg
Stabilization time (typical)
4 sec.
4 sec.
4 sec.
Minimum unit weight at
piece counting
> 0.5 mg
> 0.5 mg
> 0.5 mg
Warm-up time
8 hours
Adjustment weight
internal
Reference quantities at
piece counting
10, 25, 50, 100 freely selectable
Weighing Units
ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply
24 V AC, 500mA
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Housing (B x D x H) mm
210 x 340 x 330
Dimensions of windshield
(B x D x H) mm
160 x 140 x 205 (inside)
190 x 195 x 225 (outside)
Weighing plate (stainless
steel)
Ø 80 mm
Weight kg (net)
6.5 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338
KERN
ALJ 160-4AM
ALJ 250-4AM
ALJ 310-4AM
Weighing range (max)
160 g
250 g
310 g
Readability (d)
0.1 mg
0.1 mg
0.1 mg
Reproducibility
0.1 mg
0.1 mg
0.1 mg
Linearity
± 0.3 mg
± 0.3 mg
± 0.3 mg
Verification value (e)
1 mg
1 mg
1 mg
Verification class
I I I
Minimum load (Min)
10 mg
10 mg
10 mg
Stabilization time (typical)
4 sec.
4 sec.
4 sec.
Minimum unit weight at
piece counting
> 0.5 mg
> 0.5 mg
> 0,5 mg
Warm-up time
8 hours
Adjustment weight
internal
Reference quantities at
piece counting
10, 25, 50, 100 freely selectable
Weighing Units
ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply
24 V AC, 500 mA
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Housing (B x D x H) mm
210 x 340 x 330
Dimensions of windshield
(B x D x H) mm
160 x 140 x 205 (inside)
190 x 195 x 225 (outside)
Weighing plate (stainless
steel)
Ø 80 mm
Weight kg (net)
5.7 kg
6.7 kg
5.7 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338 5
6
KERN
ALS 160-4A
ALS 250-4A
Weighing range (max)
160 g
250 g
Readability (d)
0.1 mg
0.1 mg
Reproducibility
0.1 mg
0.1 mg
Linearity
± 0.3 mg
± 0.3 mg
Stabilization time (typical)
4 sec.
4 sec.
Minimum unit weight at
piece counting
> 0.5 mg
> 0.5 mg
Warm-up time
8 hours
Recommended adjustment weight,
not added (class)
150 g (E2)
200 g (E2)
Reference quantities at
piece counting
10, 25, 50, 100 freely selectable
Weighing Units
ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply
24 V AC, 500 mA
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Housing (B x D x H) mm
210 x 340 x 330
Dimensions of windshield
(B x D x H) mm
160 x 140 x 205 (inside)
190 x 195 x 225 (outside)
Weighing plate (stainless steel)
Ø 80 mm
Weight kg (net)
5.7 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338
KERN
PLJ 310-3F
PLJ 420-3F
PLJ 720-3A
Weighing range (max)
310 g
420 g
720 g
Readability (d)
0.001 g
0.001 g
0.001 g
Reproducibility
0.001 g
0.001 g
0.001 g
Linearity
± 0.003 g
± 0.003 g
± 0.002 g
Stabilization time (typical)
3 sec.
2 sec.
2 sec.
Minimum unit weight at
piece counting
> 5 mg
> 5 mg
> 5 mg
Warm-up time
4 hours
4 hours
4 hours
Adjustment weight
internal
Reference quantities at
piece counting
10, 25, 50, 100 freely selectable
Weighing Units
ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply
230V/50 Hz
(Euro) 9V DC
230V/50 Hz
(Euro) 9V DC
230V/50 Hz
(Euro) 24V AC
Operating temperature
+ 5° C / + 35° C
Humidity of air
max. 80 % (not condensing)
Underfloor weighing
-
-
Clevis type
eyelet, standard
Housing (B x D x H) mm
210 x 340 x 160
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high
yes
yes
yes
Weighing plate
(stainless steel)
Ø 11 cm
Ø 11 cm
Ø 11 cm
Weight kg (net)
4 kg
4.5 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338 7
8
KERN
PLJ 1200-3A
PLJ 1200-3DA
PLJ 3100-2F
Weighing range (max)
1200 g
720 g/1200 g
3100 g
Readability (d)
0.001 g
0.001 g/0.01 g
0.01 g
Reproducibility
0.001 g
0.001 g/0,01 g
0.01 g
Linearity
± 0.003 g
± 0.003 g/0.03 g
± 0.03 g
Stabilization time (typical)
2 sec.
2 sec.
2 sec.
Minimum unit weight at
piece counting
> 5 mg
> 5 mg
> 50 mg
Warm-up time
8 hours
4 hours
4 hours
Adjustment weight
internal
Reference quantities at
piece counting
10, 25, 50, 100 freely selectable
Weighing Units
ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply
230V/50 Hz (Euro)24 V AC
230V/50 Hz
(Euro)9 V DC
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Underfloor weighing
Clevis type eyelet,
standard
Clevis type eyelet,
standard
-
Housing (B x D x H) mm
210 x 340 x 160
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high
yes
yes
no
Weighing plate
(stainless steel)
Ø 11 cm
Ø 11 cm
Ø 16 cm
Weight kg (net)
4.5 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338
KERN
PLJ 4200-2F
PLJ 6200-2A
PLJ 6200-2DA
Weighing range (max)
4200 g
6200 g
4200 g /6200 g
Readability (d)
0.01 g
0.01 g
0.01 g /0.1 g
Reproducibility
0.02 g
0.01 g
0.01 g /0.1 g
Linearity
± 0.04 g
± 0.03 g
± 0.03 g / 0.3 g
Stabilization time (typical)
2 sec.
2 sec.
2 sec.
Minimum unit weight at
piece counting
> 50 mg
> 50 mg
> 50 mg
Warm-up time
4 hours
Adjustment weight
internal
Reference quantities at
piece counting
10, 25, 50, 100, freely selectable
Weighing Units
ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply
230V/50 Hz
(Euro)9V DC
230V/50 Hz (Euro)24V AC
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Underfloor weighing
-
Clevis type
eyelet, standard
Clevis type
eyelet, standard
Housing (B x D x H) mm
210 x 340 x 100
210 x 340 x 100
210 x 340 x 100
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high
no
no
no
Weighing plate
(stainless steel)
Ø 16 cm
Ø 16 cm
Ø 16 cm
Weight kg (net)
4.5 kg
5 kg
5.0 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338 9
10
KERN
PLJ 300-3FM
PLJ 720-3AM
Weighing range (max)
320 g
720 g
Readability (d)
0.001 g
0.001 g
Reproducibility
0.001 g
0.001 g
Linearity
± 0.003 g
± 0.002 g
Verification value (e)
10 mg
10 mg
Verification class
II
II
Minimum load (Min)
20 mg
20 mg
Stabilization time (typical)
3 sec.
2 sec.
Minimum unit weight at
piece counting
> 5 mg
> 50 mg
Warm-up time
4 hours
Adjustment weight
internal
Reference quantities at
piece counting
10, 25, 50, 100, freely selectable
Weighing Units
ct, g
Electric Supply
220V – 240 V AC, 50 Hz
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Underfloor weighing
Clevis type eyelet, standard
Housing (B x D x H) mm
210 x 340 x 100
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high
yes
Weighing plate
(stainless steel)
Ø 11 cm
Ø 11 cm
Weight kg (net)
4 kg
4.5 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338
KERN
PLJ 3000-2FM
PLJ 6200-2AM
Weighing range (max)
3200 g
6200 g
Readability (d)
0.01 g
0.01 g
Reproducibility
0.01 g
0.01 g
Linearity
± 0.03 g
± 0.02 g
Verification value (e)
100 mg
100 mg
Verification class
II
II
Minimum load (Min)
20 mg
50 mg
Stabilization time (typical)
3 sec.
2 sec.
Minimum unit weight at
piece counting
> 50 mg
> 50 mg
Warm-up time
4 hours
Adjustment weight
internal
Reference quantities at
piece counting
10, 25, 50, 100, freely selectable
Weighing Units
ct, g
Electric Supply
220V – 240 V AC, 50 Hz
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Housing (B x D x H) mm
210 x 340 x 100
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high
yes
Weighing plate
(stainless steel)
Ø 16 cm
Ø 16 cm
Weight kg (net)
4.0 kg
4.5 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338 11
12
KERN
PLS 310-3F
PLS 420-3F
PLS 510-3A
Weighing range (max)
310 g
420 g
510 g
Readability (d)
0.001 g
0.001 g
0.001 g
Reproducibility
0.002 g
0.002 g
0.001 g
Linearity
± 0.003 g
± 0.004 g
± 0.002 g
Stabilization time (typical)
3 sec.
3 sec.
2 sec.
Minimum unit weight at
piece counting
> 5 mg
> 5 mg
> 5 mg
Warm-up time
4 hours
4 hours
4 hours
Recommended adjustment
weight, not added (class)
300 g (E2)
400 g (E2)
500 g (E2)
Reference quantities at
piece counting
10, 25, 50, 100, freely selectable
Weighing Units
ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply
230V/50 Hz (Euro)9V DC
230V/50 Hz
(Euro)24V AC
Operating temperature
Operation period 30 h
Loading time 10 h
-
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Underfloor weighing
Clevis type eyelet, standard
Housing (B x D x H) mm
210 x 340 x 160
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high
Weighing plate
(stainless steel)
Ø 11 cm
Weight kg (net)
4 kg
4.5 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338
KERN
PLS 720-3A
PLS 1200-3A
PLS 1200-3DA
Weighing range (max)
720 g
1200 g
720 g /1,200 g
Readability (d)
0.001 g
0.001 g
0.001 g /0.01 g
Reproducibility
0.001 g
0.001 g
0.001 g /0.01 g
Linearity
± 0.002 g
± 0.003 g
± 0.002 g / 0.02 g
Stabilization time (typical)
2 sec.
2 sec.
2 sec.
Minimum unit weight at
piece counting
> 5 mg
> 5 mg
> 5 mg
Warm-up time
4 hours
8 hours
4 hours
Recommended adjustment
weight, not added (class)
600 g (E2)
1 kg (E2)
1 kg (E2)
Reference quantities at
piece counting
10, 25, 50, 100, freely selectable
Weighing Units
ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply
230V/50 Hz (Euro)24V AC
Rechargeable battery
-
-
-
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Underfloor weighing
Clevis type eyelet, standard
Housing (B x D x H) mm
210 x 340 x 160
210 x 340 x 160
210 x 340 x 160
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high
yes
yes
yes
Weighing plate
(stainless steel)
Ø 11 cm
Ø 11 cm
Ø 11 cm
Weight kg (net)
4.5 kg
4.5 kg
4.5 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338 13
14
KERN
PLS 3100-2F
PLS 4200-2F
PLS 4200-2A
Weighing range (max)
3100 g
4200 g
4200 g
Readability (d)
0.01 g
0.01 g
0.01 g
Reproducibility
0.02 g
0.02 g
0.01 g
Linearity
± 0.03 g
± 0.04 g
± 0.02 g
Stabilization time (typical)
3 sec.
3 sec.
2 sec.
Minimum unit weight at
piece counting
> 50 mg
> 50 mg
> 50 mg
Warm-up time
4 hours
4 hours
4 hours
Recommended adjustment
weight, not added (class)
3 kg (E2)
4 kg (E2)
4 kg (E2)
Reference quantities at
piece counting
10, 25, 50, 100 freely selectable
Weighing Units
ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply
230V/50 Hz (Euro)9V DC
230V/50 Hz
(Euro)24V AC
Rechargeable battery
Operation period 30 h
Loading time 10 h
no
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Underfloor weighing
Clevis type eyelet, standard
Housing (B x D x H) mm
210 x 340 x 160
210 x 340 x 100
210 x 340 x 100
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high
no
no
no
Weighing plate
(stainless steel)
Ø 16 cm
Ø 16 cm
Ø 16 cm
Weight kg (net)
4 kg
4 kg
4.5 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338
KERN
PLS 6200-2A
PLS 6200-2DA
Weighing range (max)
6200 g
4200 g/6200 g
Readability (d)
0.01 g
0.01 g/0.1 g
Reproducibility
0.01 g
0.01 g/0.1 g
Linearity
± 0.03 g
± 0.02 g / 0.2 g
Stabilization time (typical)
2 sec.
2 sec.
Minimum unit weight at
piece counting
> 50 mg
> 50 mg
Warm-up time
4 hours
4 hours
Recommended adjustment
weight, not added (class)
5 kg (E2)
5 kg (E2)
Reference quantities at
piece counting
10, 25, 50, 100, freely selectable
Weighing Units
ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply
230V/50 Hz (Euro)
24V AC
230V/50 Hz (Euro)
9V DC
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Underfloor weighing
Clevis type eyelet, standard
Housing (B x D x H) mm
210 x 340 x 100
210 x 340 x 100
Windshield mm
no
no
Weighing plate
(stainless steel)
Ø 16 cm
Ø 16 cm
Weight kg (net)
4.5 kg
4.5 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338 15
16
KERN
PLS 8000-2A
PLS 20000-1F
Weighing range (max)
8200 g
20 kg
Readability (d)
0.01 g
0.1 g
Reproducibility
0.01 g
0.1 g
Linearity
± 0.03 g
± 0.4 g
Stabilization time (typical)
2 sec.
3 sec.
Minimum unit weight at
piece counting
> 50 mg
> 500 mg
Warm-up time
4 Stunden
4 hours
Recommended adjustment
weight, not added (class)
5 kg (E2)
20 kg (E2)
Reference quantities at
piece counting
10, 25, 50, 100, freely selectable
Weighing Units
ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply
230V/50 Hz (Euro)
24V AC
230V/50 Hz (Euro)
9V DC
Operating temperature
+ 5° C …. + 35° C
Humidity of air
max. 80 % (not condensing)
Underfloor weighing
Clevis type eyelet, standard
Housing (B x D x H) mm
210 x 340 x 100
210 x 340 x 100
Windshield mm
no
no
Weighing plate
(stainless steel)
Ø 16 cm
200 x 175 mm
Weight kg (net)
4.75 kg
4 kg
Interface
RS 232C
ALJ/ALS/PLJ/PLS-BA-e-1338
2 Explanation of graphical symbols
Note: follow the directions included
in the attached document or
Follow the Operating Instructions
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
plate. 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“ in the balance. (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.
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 or damage 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.
ALJ/ALS/PLJ/PLS-BA-e-1338 17
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4 Basic Safety Precautions
Carefully read this operation manual before setup and
commissioning, even if you are already familiar with KERN
balances.
Versions in other languages are non-binding translations.
The only binding version is the original document in German.
4.1 Pay attention to the instructions in the Operation Manual
4.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
5 Transportation & Storage
5.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
ALJ/ALS/PLJ/PLS-BA-e-1338
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.
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Models ALJ/ALS:
ALJ/ALS/PLJ/PLS-BA-e-1338
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, vapors 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 / placing
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
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6.2.1 Placing
Models ALS/ALJ
Models PLS/PLJ, d = 1 mg
Design layout of weighing balance:
ALJ/ALS/PLJ/PLS-BA-e-1338
Models PLS/PLJ, d = 100 mg
Models PLS/PLJ, d = 10 mg
Level balance with foot screws until the air bubble of the
water balance is in the prescribed circle.
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Remove the transportation lock:
1
Cover windshield
2
Bubble level
3
Windshield
4
LCD display
5
Function keys
6
Adjustable feet
On the left lower side of the balance replace the golden-coloured screw with the
silver-coloured one (see sticker).
6.2.2 Scope of delivery / serial accessories
Balance (See chpt. 6.2.1)
Mains power supply
Operating Manual
6.3 Appliance overview
6.3.1 Front side of the balance
ALJ/ALS/PLJ/PLS-BA-e-1338
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