Gram RZ Series User manual

2
INDEX
INDICE
PRECAUTIONS
5
BEFORE USING THE BALANCE
5
PRODUCT INTRODUCTION
6
•Features & Specifications
6
•Front panel
7
•Keyboard & functions of keys
7
POWER SUPPLY
9
SETTING PARAMETERS
9
CALIBRATION
12
OPERATION
13
•Weighing
13
•Tare
13
•Checking function
14
•Counting pieces
15
•Accumulation
15
CONNECT THE BALANCE TO A PRINTER
16
EXPORTING DATA TO PC IN FORM EXCEL
17
U.KEY CONNECTOR
19
GARANTIE
20
PRECAUCIONES
21
ANTES DE UTILIZAR LA BALANZA
21
INTRODUCCION DEL PRODUCTO
22
•Características y especifiaciones
23
•Descripción del display
23
•Teclado y función de las teclas
24
ALIMENTACION
25
CONFIGURACION DE PARAMETROS
25
CALIBRACION
28
OPERACION
29
•Pesaje
29
•Tara
29
•Límites de peso
30
•Cuentapiezas
31
•Acumulación de pesadas
31
CONECTAR LA BALANZA A UNA IMPRESORA
32
TRANSMISION DE DATOS A UN PC EN FORMATO EXCEL
34
CONECTOR U.KEY
35
GARANTIA
36

3
SOMMAIRE
PRECAUTIONS
37
AVANT D´UTILISER LA BALANCE
37
VU ECLATÉE DE LA BALANCE
38
•Specifications
38
•Description de l´écran
39
•Description du clavier
40
ALIMENTATION
41
CONFIGURATION DES PARAMETRES
42
ETALONNAGE
47
MODE D´UTILISATION
48
•Pesage
48
•Fonction de Tare
48
•Limite de poids
49
•Compte-pieces
50
•Accumulation de pesées
50
CONNEXION DE LA BALANCE A L´IMPRIMANTE
52
FORMAT EXCEL
56
CONNECTEUR U.KEY
58
GARANTIE
60

4
PRECAUTIONS
*"Place the scale on a flat and stable surface.
*"Verify that the input voltage and the plug type matches the local AC power
supply.
* Warm up the scale for 15 minutes before using it for the first time.
* Keep the scale away from EMI noise, strong wind and vibration, which might
cause incorrect reading.
*"Avoid sudden temperature changes (suitable operating temperature is
between 0℃~ 40℃.)
*"Disconnect the power supply when cleaning the scale.
* Do not immerse the scale in water or other liquids.
*"Service should be performed by authorized personnel only.
BEFORE USING THE BALANCE
Unpacking and Checking
Open the package and check the instrument for transport damage. Immediately inform your
dealer if you have complaints or if parts are missing. The package should contain:
●Scale body ●User manual
●Weighing pans ●Adaptor
Installing Components
1) Before using the scale, remove the shipping protection screw (rotate counterclockwise),
which located underneath the scale and cork the plug buckle.
Note: the RZ-30 model doesn´t include the shipping protection screw.
2) Cover the weighing pans on the scale body properly.
Leveling the Scale
To compensate for small irregularities or inclinations at the location, the scale can be leveled.
The scale is equipped with a level indicator at the front panel .Adjust the leveling feet until
the air bubble in the indicator is centered as shown.
Note: The scale should be leveled each time once its location is changed.

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PRODUCT INTRODUCTION
1. Leveler
2. Keypad
3. Adjusting feet
4. Plastic weighing pan
5. Stainless Steel weighing pan
6. On/Off switch
7. Transport protection screws
8. Power socket
SPECIFICATIONS
FEATURES
·Resolution up to 1/15000
·Tare, Preset Tare, auto zero tracking
·Single point and linear calibration available
·HI/OK/LO quantity checking function
·Weighing platter easy to disassemble with dust proof PVC cover
·Low battery and charging status indication
·Accumulation of weight and quantity
·RS 232 port
Model
RZ-6
RZ-15
RZ-30
Capacity(kg)
6
15
30
Weighing units
Kg/g/lb
Display
LCD backlit displays (6/5/6 Digits)
Pan size
294 x 228 x 13.5mm
Scale dimensions
330 x 289 x 104mm
Power supply
DC 9v/400mA or rechargeable battery（6V/4A）

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FRONT PANEL
Low battery indicator
Tare indicator
Zero indicator. The zero range is ±2﹪maximum capacity
Battery charge indicator
High limit indicator (HI)
Ok limit indicator.
Low limit indicator (LOW).
Predeterminated Tare symbol “ ”
Net weight symbol “ ” it light on when a tare is done or a
predeterminated tare value has been entered.
Stable symbol .
“M+” symbol “ ” when weighing accumulation is actived.
Unit weight symbol, it light on when an unknow unit weight has been
entered
KEYBOARD

7
Short press steps through activated weighing units, release on desired one.
Displays gross and net weight by turns.
1. Tares the weight of the container or accepts the keypad tare entries.
2. Preset Tare and cancel the Tare
3. Select the later parameter in the same level
4. Select the later record when checking the accumulation record
5. Shift keys rightwards
1. Zeros the display (within 2% of max. capacity
2. Exits from certain operation without save
1. Long press to enter function setting
2. Deletes accumulation records
3. Delete the present accumulation record for the sake of wrong accumulation
operation under the accumulation mode
1. Adds the indicated weight into accumulation memory
2. During editing, save and return to the higher option
1. Select the former parameter in the same level
2. Select the former record when checking the accumulation record
3. Shift keys leftwards.
1. During setting value, add 1 to the current value
2. Set the upper limit of the check weighing
3. Print
1. During setting value, deduct 1 to the current value
2. Set the lower limit of the check weighing
3. Hold function

8
POWER SUPPLY
Please verify the local power source before plugging into the power outlet, and use the
individual power socket and original adaptor.
Alternative power supply
1)（9V/400mA）adaptor
2) (6V/4A) internal rechargeable battery
Power Consumption
About 300mW (without backlight)
About 380 mW (with backlight)
Low battery warning
When “ ” appears in the upper left corner of the weight window, the battery power
requires recharging. The charge lamp turns green from red when the recharging is
completed (which takes about 8 hours). Disconnect the scale from power supply when it is
fully charged. A full charged battery can operate the scale for approximately 65 hrs with
backlight, 80hrs without backlight.
Note: Battery is to be replaced only by an authorized service dealer .Risk of explosion can
occur if replaced with the wrong type or connected improperly
SETTING MODE
Function Setting
1) Press key while powering on, or key in the weighing mode to enter
parameter setting. The window displays “check”
2) Press key or to shift between the functions
3) Press key to enter the selected parameter.
4) Press key or to circle the items of present parameter.
5) Press key to save after changing and return to parameters choosing.
6) Press key to return without saving.
7) Press key again to return to weighing mode.

9
PARAMETERS
P00 Internal code checking
P01 Backlight modes
= Backlight
= No backlight
= Auto-on after getting a stable weigh data or any key is pressed. But auto off after N
seconds (N=2s, 5s, 10s, 20s, ever) with no action.
(ever=the backlight lasts forever with more than 9d placed on the pan) when
it is stable.
P02 Current using units setting
Unit: Press the key to select the default unit when powering the balance:”pcs, lb,
oz, g. kg. final” Final= keep the final being used unit when power off
Use: Press the key to select the weighing unit
On = Enable the unit
Off = Disable the unit
P03 Zero range setting
d0 (one division) , d1 (2 divisions), d2 (3 divisions), d3 (4 divisions), d4 (5 divisions) and
d5 (6 divisions)
P04 Hold function
Hold 0 : No hold function
Hold 1 : Peak hold
Hold 2: Hold after stable
Hold 3: Hold after stable. Release after moving away the article. The hold value is base
on the current value and its range could be set in sub menu. Accumulation hold function
is available, that is you could add article after hold the first value.
Hold 4: Press the key
Sub-menu for Hold 3 mode: INF (default: infinity) / 10 / 20 / 50 / 100 / 200 / 500 / 1000 /
2000/5000/10000/20000/50000
H=current hold value, R=hold value range, d=division, W=actual weight

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P05 Stable weight checking setting
On: it starts checking weight when the weight and quantity are within the checking range
and the stable symbol appears.
Off: it starts checking weight once the weight and quantity are within the checking range
P06 Check weighing function
On: Check weighing under the condition that the weight is within the limits and the stable
indication appears.
Off: Check weighing under the condition that the weight is within the limits.
P07 Check weighing buzzer beep
Hi: There will be a warning sound when the weight of articles exceeds the upper limit and
the weight is equal or more than 20d.
Lo: There will be a warning sound when the weight of articles exceeds the lower limit and
the weight is equal or more than 20d
Out: There will be a warning sound when the weight of articles is between the upper and
lower limit and the weight is equal or more than 20d
No beep: No beep
P08 External devices
= Computer
U.KEY: U.KEY connector works with PC to send the weighing data to computer
(WinXP/Win7) in form of Excel and so on.
P09 Baud rate setting:9600、4800、2400
P10 Printing modes setting
contin：Printing continually
stable：Printing automatically when get a stable weight (more than 20d)
key：Printing by pressing keys
P11 Printing format setting: prt01~prt03
P12 Filtering setting:1，2，3，4Set the filtering level in which the stable indication

11
turns on .The higher the setting, the slower stabilization time.
P13 Precondition for zeroing or taring setting:
stable ：Taring or zeroing can be not action without stable indication after pressing the
key or
always：Taring or zeroing can be action without stable indication after pressing the key
or
auto：Press key or , but it works only when get the stable indication.
P14 Weight memory parameter
On: display the last weight when powering on again
Off: do not display the last weight when powering on again
P15 Parameter initialization
Press key then key to start initialization. It is finished when displaying OK.
CALIBRATION
Note: Before calibration, please set the capacity first. The unit used in calibration is the one
that has been set before. During the calibration procedure, long press to return to
normal weighing mode without saving.
Here we take 3kg/0.2g as an example
1. Press and hold while powering on, not release it till the window displays “CAL”
2. With no load on the weighing pan, press to start zero point calibration.
3. Wait till the window displays the first calibration value.
Note: The first calibration value is default. If the value has been changed, the default value is
1/3 of full load.

12
Note: If you need to change the value, do as the following: Press key to enter the
value setting. Press key or to move leftwards or rightwards. Press key or
to modify the value (or via numeric keys). Press key to save.
4. Put the corresponding weight on the weighing pan, and then press to complete the
first point calibration.
Note: After the first point calibration, the window can display the weight value. If no need for
the other point calibration, press the to save and exit from calibration mode.
5. Add another weight 500g to the current weight. The window will show the
total weights value, press the key to complete
Repeat this step to complete the calibrations of on3, on4 and on5.
6. Press to save. After the window displays “ ”, It will return to normal weighing
mode.
Note: the window displays automatically when on5 is finished. It will be saved and
return to the normal weighing.
OPERATION
Weighing
Put item to be weighed on the scale. The Weight window shows the weight.
Tare
When weighing a sample that must be held in a container, tare and store the container
weight into memory.
1) Under the weighing mode, put the container on the scale.
Press the key to complete tare action.
The symbol appears and the window displays as shown on the right
2）Put the item into the container, then the window displays the net weight.
3）Clear the pan. The window displays the taring weight, that is the weight of container.
4) To cancel tare action, clear the pan and press or keys

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Preset Tare
1) Long press the key for three seconds, it enters to preset tare setting.
Preset-tare value setting: Press key or to shift and key or to
modify the value (or via numerickeys).
Press key to save and return to weighing mode.
2) Put the items into the container and the weight of container will be tared automatically
from the total weight.
NOTE: Press the key to display the gross and net weight in turns.
3) To cancel the preset-tare action, clear the pan and press or keys
Checking Function
Upper weight limit
1) Long press key under the weighing mode.
The number leftmost is blinking.
2) Press key or to shift and key or to modify the value
3) Press key to confirm and save.
Lower limit weight
1) Long press key under the weighing mode.
The number leftmost is blinking.
2) Press key or to shift and key or to modify the value
3) Press key to start or close weighing checking
4) Press key to confirm and save.
Put the sample on the weighing pan.
HI indication appears, when the item on the weighing pan is greater than the upper limit
OK indication appears, when the item on the weighing pan is between upper and lower limits.
LO indication appears, when the item on the weighing pan is smaller than lower limit

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Note: the item on the weighing pan should be more than or equal to 20e.
When changing the Hi-Lo value, the scale will activate the weighing checking function
automatically. If the Lo value is higher than Hi value, then the Hi value will become the same
value as Lo data.
Basic counting pieces
1) Under the weighing mode, press the key to select the unit “PCS”
.
2) Long press the key, the ex-factory default sample quantity (10pcs) is displayed.
3) Use the and keys to choose the sampling amount. Available options are: 10,
20, 50, 100, 200, 500, 1000 (pieces)
4) Put the corresponding samples on the weighing pan and then press the key. The
message is displayed momentarily before the display reverts to the sample quantity.
5) Remove the samples and put the load on, the scale calculates the amount of the load.
6) To go back to the normal weighing mode, remove the load and press the key to
select the proper unit weight.
Accumulation
1) Under the weighing mode, put the item on the weighing pan. Press the key, the
display will show momentarily the message “Add01”.
2) Remove the item and the display goes back to zero before the next accumulation can
register. (The maximum is 99 pieces, display the lastest 10 accumulation events in details)
Accumulation display
1) Press key to displays the total accumulation data.
2) Press key or to check the total accumulation and each accumulation in detail.
The number of accumulated weight is showed at the left bottom.
Note：XX=total accumulation events；XX=the single accumulation
Accumulation clear
To clear the total accumulation data or the first 10 accumulation events, press key to
display the accumulation data needed and then press the key to clear data chosen.
When clear total accumulation data, the accumulation signal “ ” will disappear and back

15
to normal weighing mode. If need to exit without clearing data and return to normal
weighing mode, press the key.
INITIALIZATION OF THE SCALE TO PRINTER (Optional)
1. Press the key while powering on to enter parameter setting. Use the
and to shift to P09 parameter.
2. Press key to enter the external device setting. Press or keys to
choose the printer model.
3. After choosing one printer model, press the key and the display will show “UNSUP”
or “INIT?”
•“UNSUP” means the printer can´t be initialized by scale. Press the key to return.
•“INIT” means the printer is should be initialized. Press the key to initialize the
printer. When the initialization is finished, the display will show the message “ok” and
then displays the printer model. Press the key to return.
Input commands
Connect the scale to computer. Run serial port debugging program on the computer. Input
the capital number “Z”, “T”, “R”, “C”, “P” in the sending area and the indicator can conduct
the corresponding actions:
Z = Zero
T = Tare
C = Cancel Tare
R/P = Reading / Print
SERIAL INTERFACE
If external interface is needed, please select proper RS-232 board and only when this board
is adopted, the functions can be enabled.
Note: RTC Is unavailable.

16
Troubleshooting and Error message
Exporting data to PC in the form of EXCEL
Introduction:
Connect the scale with PC and set the parameter of external device as “EXCEL” on the
scale, then you could export the weighing data to PC in the form of EXCEL. With this
function, you could record/accumulate/average/data statistical analysis the testing data,
which we could call it as scale-computer data management function.
Note: pls enable “Use Serial Keys” function in the computer.
Error
Message
Problem
Solution
ERR0
Exceed the zero range
The item on the pan should be within 2% of
full load.
ERR2
Initial zero point exceeds 30% of
full load
1.Remove the obstacle article under the pan
2.Replace the load cell or contact the
maintenance department.
ERR3
Exceed the A/D resolution range
1. Replace A/D
2..Replace the load cell or contact the
maintenance department.
ERR4
EEPROM failure
Re-weld EEPROM or contact the
maintenance department.
ERR5
Overload condition
Remove the overload item
ERR6
Exceeds the display range
-----------------------------------------------
ERR7
Accumulated number of
weighments exceeds the display
range
Delete the exceeding weights
ERR8
Weight limit value is higher than the
full load value
Reset the weight limit value.
ERR9
Exceed tare or pre-tare range
0＜Tare value≤full load
ERR10
Wrong calibration weights
Place the right test weights and the
calibration value should be below full load.

17
Hardware connection and settings
1. Use transmitting serial wire or USB wire to connect scale and pc.
Note: pls install usb driver first, if you use usb wire.
2. Parameter settings in scale:
"PERI" = "EXCEL" (external device)
"BAUD" = "2400"/"4800"/"9600" (baud rate)
"PRT.M" = "KEY"/"STABLE" (printing model)
"PRT.F" = "PRT.F01" (printing format)
Enable the function of “Use Serial Keys” in the computer
Set Windows XP as a example:
1. Press “Start” ->"Run", and enter “access.cpl” ->”OK”.
2. In the dialog box ”Accessibility Options”, enter General option, choose “Use Serial Keys”
and press “Settings”.
In the dialog box ”Settings for SerialKeys” , set the corresponding Serial port and Baud
rate, which should be same as Baud rate in scale.
3. Test if Serial Keys works well.
Open a Text Document, and press the Print buotton on the scale. The Serial Keys works
well, if pc exports the weighing data to Text.

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Export weighing data to Excel
1．Open Excel.
2．Press [Print], then Excel will show Weighing data.
3. Use “Format Cells” to beautify Excel:
Troubleshooting
1. Enable “Fast User Switching” function will disable “Use Serial Keys” in the computer.
Note: Start->"Control Panel "->"User Account"-> “Fast User Switching” function.
2. The data export requires only “GND+RX+TX” three lines, while some wire include nine
lines (including usb 9-25pin adapter), which may cause abnormal function.
Note: cut other useless line to check if these three lines work well.
U.KEY Connector
Introduction
Connect the scale with PC and set the parameter of external device as “U.KEY” on the scale,
then you could export the weighing data to PC in the form of EXCEL. With this function, you
could record/accumulate/average/data statistical analysis the testing data, which we could
call it as scale-computer data management function.
Most importantly, you don’t need any setup in computer, but only use U.KEY connector to
link computer system directly, such as EXCEL, Express System, ERP system and so on.
This connector is compatible with windows2000/xp/Vista/win7/win8/Linux/Android system,
and the weighing data will show on the position where the mouse cursor in.
With one USB port, you could connect scale to computer easily.
Precaution
1.Close the input method program before connecting.
2.Ensure the decimal point digit is same as the parameter setting of scale, if use EXCEL file

19
in computer.
For Example:
Scale shows: Total Weight: 1.000KG 、Unit Weight: 0.001g、Total: 1000PCS
EXCEL Setting: the decimal point digit should be 3 for total weight and unit weight column,
and the decimal point digit should be 0 for total column.
Setting
1．Prepare one computer with windows2000/xp/Vista/win7/win8/Linux system or Android
pad.
2. Scale setting:
"PERI" = "U.KEY" (External devices)
"BAUD" = "9600" (Baud)
"PRT.M" = "KEY"/"STABLE" (Print Mode)
"RTC" ="ON"/"OFF" (Time)
3. Open the receiving port such as EXCEL or ECR system, and the weighing data will show
on the position where the mouse cursor in
WARRANTY
This scale is guaranteed for one year from the delivery date. The guarantee covers any
fabrication defect of the material.
During this period GRAM PRECISION, covers the manpower and the spare parts necessary
for the reparation of the scale.
This guarantee does not cover the failures caused by an inappropriate use or overcharge.
The guarantee does not cover the freight cost (transport) necessary to repair the scale.

20
PRECAUCIONES
*"Instalar la balanza sobre una superficie plana y estable.
* Comprobar que el voltaje de entrada y el tipo de enchufe coincida con la fuente de
alimentación local.
* Precaliente la balanza durante 15 minutos antes de utilizarla por primera vez.
* Mantener la balanza lejos de vibraciones, fuertes corrientes de aire y luz
directa solar.
* Evitar cambios bruscos de temperatura (la temperatura de funcionamiento adecuada está
entre 0℃~ 40℃.)
*"Desconectar la balanza de la red para limpiarla.
*"No sumergir la balanza en agua u otros líquidos.
ANTES DE UTILIZAR LA BALANZA
Desembalar
Abrir el embalaje y revisar que la balanza está en perfectas condiciones y que no exista
ningún desperfecto por el transporte. En caso de desperfectos informar inmediatamente al
Distribuidor. El embalaje incluye:
●Balanza ●Manual de Instrucciones
●Plato de pesada ●Alimentador
Instalación
1) Antes de utilizar la balanza, retirar el tornillo de protección (rotar en sentido antihorario), el
tornillo de protección está situado en la parte inferior de la balanza.
Nota: El modelo RZ-30 no lleva instalado este tornillo de protección.
2) Colocar el contraplato de plástico y el plato de acero inoxidable correctamente.
Nivelar la balanza
Para compensar pequeñas irregularidares o inclinaciones de la superficie, se debe nivelar la
balanza ajustando los pies regulables hasta que la burbuja del nivel quede en el centro.
Nota: La balanza se debe nivelar cada vez que se cambie de ubicación.