Kern PES 220-3M, PES 420-3M, PES 620-3M, PES 2200-2M, PES 4200-2M, PES 6200-2M, PES 8200-1M, PES 15000-1M, PES 31000-1M, PEJ 220-3M, PEJ 420-3M, PEJ 620-3M, PEJ 2200-2M, PEJ 4200-2M User guide
EC-Konformitätserklärung EC-Declaration of -Conformity
EC- Déclaration de conformité EC-Declaración de Conformidad
EC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodnościEC-Заявлениеосоответствии
Electronic Balance: KERN PES/PEJ
PES/PEJ-BA-e-1316
11
3. Basic Information (General)
The appliance may only be opened by trained service technicians according to
KERN standards.
Before opening, disconnect appliance from power supply!
Warranty claims will be voided when appliance is opened.
The PES/PEJ weighing system may not be used in explosive areas or areas
with explosive substances.
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 weighings. In the event that small quantities are removed or added to the material to be weighed, incorrect weighing results can be dis-
played 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. This could
cause damage to the balance.
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
when 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
PES/PEJ-BA-e-1316
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3.4. Monitoring of Test Resources
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.
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
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
Keep all parts of the original packaging in case you need to return the appliance.
Only use original packaging for returning.
Before sending, disconnect all connected cables and loose/movable parts.
Attach possibly existing transport safeguards. Secure all parts, e.g. glass windshield,
weighing plate, power unit etc., to prevent slipping and damage.
PES/PEJ-BA-e-1316
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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 instal-
ling 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 war-
mer environment. In this case, acclimatize the disconnected appliance
for ca. 2 hours at room temperature.
Avoid static charging of the material to be weighed, weighing container
and windshield.
If electro-magnetic fields or static charge occur, or if the power supply is unstable
major deviations on the display (incorrect weighing results) are possible. In that case,
the location must be changed.
6.2. Unpacking
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
PES/PEJ-BA-e-1316
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Air bubble
Covering lid over
underfloor
weighing device
Connection net adapter
Antitheft device
Rear view:
Your balance in overview:
RS 232 interface
Printer interface
PES/PEJ-BA-e-1316
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6.3. Scope of delivery
Positioning of weighing plate:
Levelling balance:
Use the foot screws to level the
balance until the air bubble in
the bubble level is in the prescribed circle.
Serial accessories:
Balance
Weighing plate
Mains power supply
Operating Manual
Protective cover
6.4. Setup
PES/PEJ-BA-e-1316
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6.5. Mains connection
Battery charge sufficient
Battery very low. To charge the battery, connect it to the mains
as soon as possible (re-calibration not possible).
flashes
Voltage has dropped below prescribed minimum. Plug in the
mains adapter, to charge the balance via the electrical network
(15h).
RS 232 interface
Printer interface
Power is supplied via the external mains power supply. The stated voltage value
must be the same as the local voltage.
Only use original KERN mains power supplies. Using other makes requires consent
by KERN.
In the menu you can activate the AUTO-SLEEP function . In net operation
the balance after 3 min without load change or key pressure passes in a sleep mode.
Automatic activation of the display by load change or by pressing any key.
6.6. Internal battery operation (cannot be reequipped)
The optionally supplied battery is charged with the supplied power supply.
Before the first use, the battery should be charged by connecting it to the mains
power supply for at least 15 hours. The operating time of the battery is about. 6h;
charging time until complete recharging ca. 15h.
In the menu you can activate the AUTO-OFF function . After 3 min without
load change the balance switches automatically off in order to spare the battery.
When the balance is in battery mode the following symbols appear on the display:
6.7. Terminal for external devices
PES/PEJ-BA-e-1316
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6.8. Initial Commissioning
The balance will carry out a self-test
Supply balance with power via the
mains power supply.
Balance is in stand-by mode
(green LED is on).
Use the -key to switch the balance on.
g
g
By pressing lightly it is possible to
check whether the balance display
changes.
Stand-by
Use the -key to switch the balance off. The balance is now in
stand-by mode again (green LED
is on).
A warming up time of 10 minutes after switching on stabilizes the measuring values.
The accuracy of the balance depends on the local acceleration of gravity.
Please be sure to observe the information in the chapter on adjusting in chap. 6.9.
weihging dish unloaded half of weighing range weighing range is used
to full capacity
In configuration menu 1 (chapter 7) you can activate/deactivate the bar graph display.
The weighing range of the balance is divided into 40 graphic cuboids. Zero (0) will
appear on the graphic display if there is no weighing value on the balance. 20 graphic cuboids are displayed if the balance is loaded up to one half of its weighing range.
6.8.3. Stability display
Stable
Unstable
If the display shows the stability display [ο] the balance is in a stable status. The [ο]
indication disappears if the condition is unstable.
6.8.4. Balance zero display
Environmental influences can lead to the exact figure of “000.0“ not being displayed
in spite of an empty weighing dish. It is, however, possible to reset your balance to
zero at any time and thus ensure that weighing really does commence at zero. Setting to zero when a weight is applied is only possible within a certain type-dependent
range. In the event that the balance cannot be reset to zero with an applied weight,
this range has been exceeded. [o - Err ] will appear on the display.
If an exact zero reading is not displayed on the balance in spite of the weighing dish
being empty, press the TARE key and the balance will start resetting to zero. Your
balance will be set to zero after a short standby time.
In addition to this, the sign for the balance zero setting will be displayed [0].
PES/PEJ-BA-e-1316
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Model
Recommended
adjusting weight
Not ideal for metrological adjustment
PES 220-3M
200 g (F1)
100 g
PES 420-3M
2 x 200 g (E2)
200 g
PES 620-3M
500 g (E2)
300 g
PES 2200-2M
2 kg (F1)
1000 g
PES 4200-2M
2 x 2 kg (E2)
2000 g
PES 6200-2M
5 kg (E2)
3000 g
PES 8200-1M
5 kg + 2 kg (F1)
4000 g
PES 15000-1M
10 kg + 5 kg (F1)
7000 g
6.9. Adjustment
As the acceleration value due to gravity is not the same at every location on earth,
each balance 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 balance has not already been adjusted to the location in the factory). This
adjustment process must be carried out at every 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 balance periodically in
weighing operation.
6.9.1. Adjustment with external weight (only PES)
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.
Information concerning the adjusting weights is available at: http://www.kern-sohn.com
Procedure when adjusting:
Observe stable environment conditions. A warming-up time of ca. 30 minutes for
stabilisation is necessary. Ensure that there are no objects on the weighing plate.
At verified balances, the adjustment is locked by a switch (except accuracy class I).
In order to adjust, open the locking switch see chap.6.10.1 (except accuracy class I).
PES/PEJ-BA-e-1316
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Operation
Display
Activate function [ ] (see chap. 7).
g
Zero point will be saved.
CAL
CAL
Carefully place adjusting weight in the centre
of the weighing plate
Adjustment process is started.
The process of adjustment is completed.
Remove adjusting weight, balance will return
into weighing mode automatically. In case of
an adjustment error or incorrect adjusting
weight the display will show [- Err]; repeat
adjustment process.
CAL
CAL
CAL
g
PES/PEJ-BA-e-1316
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6.9.2. Adjustment test with external weight (only PES)
Operation
Display
Activate function [ ]
(see chap. 7).
g
During adjustment tests the balance automatically compares the saved value of the
adjustment weight with the actual value. This is only a check, i.e. no values are
changed.
Procedure:
Observe stable environmental conditions. A warming up time of ca. 1 hour is required for stabilization. Ensure that there are no objects on the weighing plate.
PES/PEJ-BA-e-1316
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Start of the adjustment test:
Carefully place adjusting weight in the
centre of the weighing plate
The difference between the saved value
and the measured value is displayed.
Take away adjustment weight.
Press any key; the adjustment process is
cancelled and the balance returns to
weighing mode.
CAL
CAL
CAL
CAL
g
CAL
g
PES/PEJ-BA-e-1316
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Switch on the balance using ON/OFF.
The balance carries out a selftest, „M“
will be displayed flashing.
After that the automatic adjustment
starts:
„Aut. CAL“ appears flashing,
followed by „CH. 0“ and „CH. F.S.“
If „End“ is displayed, the automatic ad-
justment has been concluded successfully.
The balance changes into weighing
mode thus being ready for weighing.
g
6.9.3. Automatic adjustment (only PEJ)
After switching on the balance, the automatic adjustment starts with the internal adjustment weight.
PES/PEJ-BA-e-1316
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6.9.4. Adjustment with internal weight (only PEJ)
Operation
Display
Activate function [ ]
(see chap. 7).
g
Start of the automatic adjustment:
Adjustment is carried out automatically.
The process of adjustment is completed.
The balance returns automatically into
weighing mode.
CAL
CAL
CAL
With the internal adjustment weight, the weighing accuracy can be checked and readjusted at any time.
Procedure when adjusting:
Observe stable environmental conditions. A warming up time of ca. 1 hour is required for stabilization. Ensure that there are no objects on the weighing plate.
PES/PEJ-BA-e-1316
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CAL
g
Operation
Display
Activate function [ ]
(see chap. 7).
g
Start of the adjustment test:
The test is carried out automatically.
CAL
CAL
6.9.5. Adjustment test with internal weight (only PEJ)
During adjustment tests the balance automatically compares the saved value of the
adjustment weight with the actual value. This is only a check, i.e. no values are
changed.
Procedure:
Observe stable environmental conditions. A warming up time of ca. 1 hour is required for stabilization. Ensure that there are no objects on the weighing plate.
PES/PEJ-BA-e-1316
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CAL
The difference between the saved value
and the measured value is displayed.
Press any key; the adjustment process is
cancelled and the balance returns to
weighing mode.
g
g
PES/PEJ-BA-e-1316
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6.10. Verification
General introduction:
According to EU directive 90/384/EEC 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 instructions
An EU type approval exists for balances described in their technical data as verifyable. If a balance is used where obligation to verify exists as described above, it must
officially verified and re-verified in 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!
Balances with obligation to verify must be taken out of operation if:
The weighing result of the balance is outside the error limit. Therefore, in
regular intervals load balance with known test weight (ca. 1/3 of the max. load)
and compare with displayed value.
The reverification deadline has been exceeded.
Before models PES 2200-2M, PES 4200-2M, PES 8200-1M, PES 15000-1M are
verified, the adjustment function „ “ must be activated.
Therefore, external adjustment in verification mode is impossible
PES/PEJ-BA-e-1316
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