Gram FV 220, FV 120, FV 220C, FV 120C Operation Manual

SERIES

FV

120 / 120C / 220 / 220C

OPERATION MANUAL

2

INDEX English

Introduction 3

Installation 4

Unpacking 4

Specifications 4

Environmental requiremens 5

Setting up the balance 6

Using the balance 6

Basic weighing 6

Count weighing 7

Percent Deviation 8

Display and keyboard 8

Display symbols 9

Calibration 9

Auto-calibration (For models FV-120C and FV-220C) 10

Manual calibration (For models FV-120 and FV-220) 10

Parameters setting 12

Parameters index 13

RS-232 interface 14

Transmission Format 14

Data output mode 14
Auto Output Mode 14
Command Output Mode 15

External commands 16

Connection of balance and external device 17

Trouble shooting 17

Care and maintenance 19

Cleaning 19

Guarantee 20

3

ENGLISH

INTRODUCTION

To insure a proper operation of the balance, please read this manual
completely before you start to use your balance.

The analytical balances are the latest products of years of research, design,

development and infield testing. Every balance incorporated with the
advanced electromagnetic force sensor technology, mechanical engineering
and software technology offers the following features:

• Easy to operate and read results from a clear big LCD with a white backlight.

• Rapid weighing speed is 10 times faster than mechanical balances.

• Able to tare up to the maximum capacity of the balance.

• Multiple weighing modes can be selected.

1. Normal weighing.

2. Piece counting.

3. Percentage weighing.

• Multiple weighing units conversion such as g and ct as standard units
and the extra weighing units popularly used in some countries can be
put into the balance on customer´s request.

• A standard RS-232 interface for connecting peripheral device such as a
computer or a printer.

• Dysfunction alarm.

• Easy to calibrate the balance.

• Display separate from body.

4

INSTALLATION

Unpacking

CAUTION: Handle with care all time!

Remove the balance from the carton carefully with the following items:

Packing List

• 1 Main body of the balance.

• 1 Pan.

• 1 Pan support.

• 1 AC power adapter.

• 1 User.

• 1 Standard weight (F1 Class).

• 1 Display.

It is recommended to save the cartons and packing materials for storing and
transporting the balance or returning it for services.

SPECIFICATIONS

MODEL FV-120 FV-220 FV-120C FV-220C

Capacity 120g 220g 120g 210g

Readability 0,1 mg

Repeatability 0,1 mg

Linearity 0,2 mg

5

Four-corner 0,2 mg

Stabilization time About 5 sec.

Sensitivity 2 ppm

Calibration External Automatic internal

Operating temperature 20 - 25 ºC

Pan size 90 mm

Dimensions 320 x 300 x 470 mm

Power AC 110V-230V 50Hz-60Hz

ENVIRONMENTAL REQUIREMENS

As a precision instrument, the analytical balance requires an environment
which is free from excessive air flow, corrosive, vibration and temperature
or humidity extremes.The mentioned factors will affect displayed weighing
readings.

• Keep weighing ambient clean and dry all time;

• The best operating temperature is about 20ºC / 68ºF at about 50%

relative humidity.

• Use a stable AC main.

• Don´t place the balance:

– In direct sunshine.
– Next to open windows or a door causing draft or rapid temperature

charges.
– Near heater or air conditioner.
– Near vibrating, rotating or reciprocating equipment.
– Near magnetic field or equipment which generates magnetic field.
– On an unstable weighing table.
– In areas where the danger of explosion exists.

6

SETTING UP THE BALANCE

Warm up the unplugged balance at an indoor temperature for two hours
whenever moved it from a colder place, otherwise the accuracy will be
affected by condensation of in side and surface of the balance.

• Place the balance on a stable and level work surface.

• Level the balance by turning the adjusting feet, checking the level

indicator on the balance,until the bubble appears in the center of the
circle.

• Put the parts of the balance as following sequence: dust guard, draft
ring, pan support and pan.

• Plug in the AC adaptor.

• Check if the adaptor does match your main supply before plug in.

USING THE BALANCE

Note: To avoid dust, keep your balance door closed whenever it is not

continually used.

Plug in and pre-warm your balance at least 30 minutes before weighing.

Basic weighing

1. Plug in the power, the balance will automatically proceed system
initialization and display status of off.

2. Press the key, the balance will display 0.0000g.

7

3. Place the container on the weighing pan.

4. Press the key.

5. Place the sample object in the container and close the doors.

6. Read out the value after display is stable.

7. Repeat the steps to weigh next object.

Count weighing

To decide the total number of the components of similar weights, first get the

weight of a known number of the components as a reference, then we could
get the average weight of the component. Then the amount of the components
on the pan will be decided.

1. First set the sample components quantity refer PARAMETER SETTING (for
example, if the amount of sample is 50 pcs, you should setup the C2-2).

2. Press the key, the balance will display 0.0000g.

3. Press the key, till the balance will display PCS mode.

4. Place the sample on the pan, then press the

key, the balance will read the

amount number of the samples. The unit displayed on the LCD display is PCS.

5. Add the sample components you want, you could read the value when [O]
is on the display.

6. Press the key to convert between counting mode and other mode.
PCS indicates piece number.

Note: The sample value should not be less than readability value.