Gram RV-300i, RV-500i, RV-4000i, RV-3000i Operation Manual
GENERAL DESCRIPTION
RV series electronic balances are destined for high accuracy weighing in
laboratory practice.
RV series balances are equipped with internal calibration system for accuracy
control during balance operation.
All balances are Metrologically tested. According to an order balances can be
calibrated or legally verified.
Balances with legal verification are marked with the following legal and securing
items:
- Green metrological mark placed on the balance name plate,
- Notified body stamp (number of notified body) on the balance name plate,
- Protective seals placed on: an edge of balance name plate, the casing mounting
screw and in the place of access to adjustment switch,
Renewing of balance legal verification is required when protective seal is violated
or after period of 3 years starting from 1st December of year when first legal
verification was performed. In order to renew legal verification please contact
your Distributor.
Certificates:
Certificate of ISO quality system Certificate of balance type approval
DIN EN ISO 9001:2000 TCM 128/06-4428
PACKING LIST
1. Balance
2. Pan elements:
- For balances with round pan (RV-300 and RV-500): a pan support and a
pan.
- For balances with rectangular pan (RV-3000 and RV-4000): gum nuts (4pcs)
and a pan,
3. Draft shield with cover (RV-300 and RV-500)
4. Feeder 12V / 850mA
5. User manual,
SAFETY RULES
It is necessary to follow safety rules of work with the
balance shown below. Obeying those rules is the
condition to avoid electrical shock or damage of the
balance or connected peripheral devices.
• Repairs and necessary regulations can be done by authorised personnel
only.
• To avoid fire risk use a feeder of an appropriate type (supplied with the
balance) and supply voltage have to be compatible with specified
technical data.
• Do not use the balance when its cover is opened.
• Do not use the balance in explosive conditions.
• Do not use the balance in high humidity environment.
• If the balance seems not to operate properly, switch it off and do not use
until checked by authorised service.
According to current acts of low about protection of
natural environment, wasted balances should not be
put into waste containers together with ordinary
waste.
• Wasted balance after operation period can be delivered to units
authorized for gathering wasted electronic devices or to the place where
it was bought.
TECHNICAL DATA
Model
RV-300
RV-500
RV-3000
RV-4000
Capacity (Max)
300g
500g
3000g
4000g
Min load (Min)
0,02g
0,02g
0,5g
0,5g
Reading unit (d)
0,001g
0,001g
0,01g
0,01g
Verification unit (e)
0,01g
0,01g
0,1g
0,1g
Tare range
-300g
-500g
-3000g
-4000g
Accuracy class
II
Working temperature
+18 ÷ +33°C
Weighing time
<3s
Pan dimension
f115m
m
165x165mm
Balance dimension (with legs)
215(235 with legs)x345x90mm
Balance weight
5kg
Power supply
~230V 50Hz 6VA / =12V 800mA
Recommended external calibration weight (OIML)
F1 100g
F1 200g
F1 2000g
F1 2000g
Caution:
F1 is international symbols of calibration weight classes according to
O.I.M.L. Some requirements for weight accuracy are connected with those
classes.
GENERAL BALANCE VIEW
RV-300 and RV-500
1 – Pan
2 – Pan support
3 – Pan ring
4 – Display LCD
5 – Keys
6 – Rotating legs
7 – Water level
8 – Draft shield
.
7
6
1
2
4
3
5
8
RV-3000 and RV-4000 balances:
1 – Pan
2 – Nuts (under pan)
4 – LCD display
5 – Keys
6 – Rotating legs
7 – Water level
Connectors view:
Feeder
~230V/50Hz
Printer
or computer
ON
OFF
Adjustment
switch
RxD (receiver)
TxD (transmitter)
GND
Case
RS232C
Feeder
1
2
3
4
5
6
7
8
9
7
6
1
2
4
5
KEYS AND INDICATORS
Description of basic functions for keys and indicators:
®T¬
- taring (enter mass subtracted from weighed mass)/ confirmation
of selected menu options,
®0¬
- zeroing (option),
- result printout (transmission),
- internal calibration / accelerated options viewing
✣
- switch: special function / weighing,
MENU
- enter to special function menu,
I/
- switch on / switch off (standby),
indicator
- shows stabilization of weighing result,
linear indicator
- indicator of balance load (0-100%),
OFF indicator
- appears after the balance is switched off with I / key,
distinction of last
digit
- informs that reading unit value is lower than acceptable indication
error (balances with legal verification, d¹e)
Max, Min, d, e, II
- metrological parameters of the balance.
The use of keys during entering numeric values (special functions):
- increment current digit,
- insert comma,
®T¬ - move to next position,
MENU - finish entering.
Max Min e d
II
PREPARING WORKING ENVIRONMENT
+18°C
+33°C
Location for the balance should be chosen with care in order to limit influence of the
factors that can interrupt working balance. This location has to maintain proper
temperature for working balance and necessary space for its operating. The balance
should stay on stable table made of material that does not influence magnetically on
the balance.
Rapid air blasts, vibrations, dust, rapid temperature changes or air humidity over 90%
are not allowed in balance surrounding. The balance should be far from heat sources
and devices emitting strong electromagnetic or magnetic fields.
PREPARING THE BALANCE TO WORK
1. Take the balance, the feeder and
mechanical elements of the pan out.
It is recommended to keep the
original scale package in order to
transport the balance safely in
future.
2. Place the balance on a stable
ground not affected by mechanical
vibrations and airflows.
3. Level the balance with rotating
legs 6 so that the air bubble in water
level 7 at the back of the balance is
in the middle.
4. (For RV-300 and RV-500) Gently
insert the mandrel of pan support 2
into balance mechanism socket
through the pan ring 3 and the pan 1
on.
5. (For RV-3000 and RV-4000)
Place nuts 2 on mandrels that are
visible in balance cover holes, put
the pan 1 on nuts.
If the balance was taken from a lower temperature surrounding to a room
with higher temperature, e.g. in winter, moisture can liquefy on the balance
casing. Do not connect power supply to the balance, because this can cause
damage or improper work of the balance. In this case leave the balance for
at least 4 hours unplugged for acclimatization.
7
6
1
2
3
7
6
1
2
GENERAL OPERATION PRINCIPLES
1. Weighed sample should be placed in the centre of the pan
2. The balance allows taring in the whole measuring range. To tare the balance press
®T¬
key (on the left or on the right). Taring does not extend measuring range, but
only subtracts tare value from mass value of a sample placed on the pan. To make
the control of pan load easier and to avoid crossing measurement range, the
balance has a load indicator calibrated 0÷100% Max.
3. Weighing result should be read when the indicator " " lights, which signalises
stabilisation of a result.
4. When the balance is not used but should be ready to work immediately, it can be
switched off by pressing I/ key. The backlight of balance reading system is then
switched off and the balance enters into "standby" mode, in which the balance
maintains internal temperature and ability to start working with maximum accuracy.
Standby mode is signalled by the OFF indicator. To switch the balance on press I/
key.
5. In direct sale use (d=e), make sure that ®0¬ zero indicator is displayed before
sample is placed on the pan. If not, press ®0¬ key and wait until the balance is
zeroed and zero indicator appears. In other balances the key does not operate.
6. Balance mechanism is a precise device sensitive to mechanical shocks and
strokes.
7. After every change of balance position, level the balance and perform internal
calibration using key.
8. The balance cannot be used to weigh ferromagnetic materials due to decrease of
weighing accuracy.
START-UP
Plug feeder into 230V power supply socket. When the pan is empty plug feeder output
connector into 12V socket at back of the balance. Autotests and internal calibration will
be performed.
Do not overload the balance more than 20% of maximum capacity.
Do not press the pan with a hand.
For transportation take off the pan (move it gently and lift it up) and pan
support (lift it up) and protect from any damages.
Steps after start-up of the balance:
Tests of electronic components.
Test of internal calibration motor test
(engine heard).
Displaying balance program version.
Starting internal calibration.
Zeroing the balance.
Loading internal weight.
Zeroing the balance
Balance is ready to work.
INTERNAL CALIBRATION
The balance is equipped with internal calibration system, which general task is to
maintain required measurement accuracy on the balance.
Internal calibration is the process of putting internal weight on automatically by balance
mechanism and correcting accuracy in balance firmware. The correction is necessary
because of differences between values of gravitational acceleration in the place where
the balance was manufactured and in the place where it is operated, as well as due to
changes of balance level and temperature.
Internal calibration is performed in the following situations:
C-1
C-5
-------
-------
0.000g
AC-...
LO A D C
C
-CAL-
- When key is pressed,
- After defined time interval (for legally verified balances - 2 hours),
- After temperature change (for legally verified balances – more than 2oC).
In legally verified balances time interval is set to 2 hours and defined temperature
change is 2oC. In not legally verified balances those values can be set as calibration
options. Starting internal calibration process is signalled with - CAL - message.
In order to perform internal calibration, proceed with the following:
1. Empty the pan.
2. Press key (to leave internal calibration, press second time when “------“ is
displayed).
During calibration internal weight is put three times on and obtained results are
compared.
Discrepancy of results is signalled with a message and causes the balance being
blocked.
Until calibration process is finished do not perform any operation on the balance. Any
vibrations and shocks interfere calibration process and may delay it or deteriorate
accuracy of its result.
When internal calibration is performed successfully the balance indicates zero on the
display at empty pan.
BASIC FUNCTIONS
Following symbol graphic will be used in instruction:
- Loaded pan
- Unloaded pan
- Press a key when ... (on left)
- Forced change
- Automatic change
1 2 g
T
NORMAL WEIGHING
When a pan is empty and
indication is different than zero
press ®T¬ key.
Weighing result should be read
when the indicator " " lights.
WEIGHING WITH TARE
A balance is equipped with tare
equal to its range.
BALANCE CHECKING
As weight indication depends on gravitational acceleration, it is advised to check
balance indication accuracy before and after series of measurement using any load
with known weight.
To check a balance with legal verification use calibration weight as stated in Technical
Data table with valid calibration certificate. In case permissible error is exceeded it is
advised to contact the nearest service to calibrate a balance.
0.00 g
43.04 g
23.13 g
0.00 g
63.24 g
T
T
CONNECTING THE BALANCE TO A COMPUTER OR PRINTER
The balance may send data to a computer or a printer via RS232C interface.
When cooperating with a computer, the
balance sends weighing result after
initialising signal from a computer or after
pressing key.
When cooperating with the balance, a
computer should be equipped with a
program that enables receiving and
processing data from the balance.
GRAM PRECISION offers computer programs to cooperate with balances. Demo
versions and program descriptions are available on the website: www.gram.es:
- Komunikacja – free serial port testing program,
- ProCell – residual program for cooperation with Microsoft EXCEL and other
Microsoft Windows applications (demo version).
Detailed information for programmers:
The balance sends data with a following method:
Computer ® Balance: initiation signal S I CR LF (53h 49h 0Dh 0Ah),
Balance ® Computer: weighing result in the following format:
(16Bytes, LONG protocol - 8bits, 1stop, no parity, 4800bps),
Bytes description:
1
- „-„ mark or space
2
- space
3¸4
- digit or space
5÷9
- digit, decimal point or space
10
- digit
11
- space
12
- k, l, c, p or space
13
- g, b, t, c or %
14
- space
15
- CR
16
- LF
Connection cable WK-1 (balance – computer / 9-pin):
RxD (receiver)
TxD (transmitter)
GND
Case
RS232C
1
2
3
4
5
6
7
8
9
Connection cable WD-1 (balance - KAFKA printer):
Setup of printer internal switch – printer AXIS C-001:
SW-1
SW-2
SW-3
SW-4
SW-5
SW-6
SW-7
SW-8
on
off
on
off
off
on
off
off
SPECIAL FUNCTIONS DESCRIPTION
q Menu customization function (ACtIV),
q Removal of all function from menu (dEFAUL).
q Autozeroing function (AutoTar),
q Pieces counting function (PCS),
q Function for setting serial port working (SEndIng),
q Function for setting serial port parameters (RS232),
q Extended calibration function (CALIbr),
q Changing measurement unit (UnIt),
q Percentage weighing function (PErCEnt),
q Recipe weighing function (rECIPE),
q Entering tare function (tArE),
q Force measurement (F),
q Maximum value indication function (UP),
q Anti-disturbance filter function (FILtEr),
q Weighing large animals function (LOC),
q Average calculating function (AVErAGE),
q Determining solids and liquids density function (hYdro)*
q Statistical calculations (StAt)- option*
q Paperweight calculation function (PAPEr)*
Function with additional equipment require:
§ Options with the clock:
- Setting current date and time function (dAtE)
- Total weight function (totAL)
§ Options with the transoptors connectors:
- Checkweighing function (thr)
BALANCE COMPUTER
BALANCE PRINTER
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