Nova-Tech GC Indicator User Manual

GC INDICATOR

(

P.N. 3056610550, Revision C6, August 2010)

Software Rev 2.18 and up

Adam Equipment

Easy Reference:

Model name of the indicator/scale:

Serial number of the unit:

Software revision number (Displayed when power is first turned on): Date of Purchase:

Name of the supplier and place:

CONTENTS

1.0 INTRODUCTION...................................................................................3

2.0 SPECIFICATIONS ................................................................................4

3.0 INSTALLATION....................................................................................6

3.1 UNPACKING......................................................................................6

3.2 LOCATING.........................................................................................6

3.3 CONNECTION ...................................................................................7

4.0 KEY DESCRIPTIONS ...........................................................................8

5.0 DISPLAYS ............................................................................................9

5.1 WEIGHT DISPLAY.............................................................................9

5.2 UNIT WEIGHT DISPLAY..................................................................10

5.3 COUNT DISPLAY ............................................................................10

5.4 OTHER SYMBOLS ..........................................................................10

6.0 OPERATION.......................................................................................11

6.1 ZEROING THE DISPLAY.................................................................11

6.2 TARING............................................................................................11

6.3 PARTS COUNTING .........................................................................12

7.0 USER PARAMETERS ........................................................................15

7.1 SETTING OF PIN.............................................................................16

7.2 ENABLE WEIGHING UNITS ............................................................16

8.0 CALIBRATION....................................................................................17

9.0 RS-232 INTERFACE...........................................................................18

9.1 INPUT COMMANDS FORMAT ........................................................21

9.2 RS-232 SETUP ................................................................................22

9.3 REAL TIME CLOCK SETUP ............................................................24

9.4 AUTO SLEEP FUNCTION ...............................................................25

10.0 BATTERY AND BACKLIGHT OPERATION....................................25

10.1 BATTERY......................................................................................25

10.2 BACKLIGHT FOR LCD .................................................................26

11.0 ERROR CODES...............................................................................27

12.0 SERVICE PARAMETERS................................................................28

12.1 USING “0000” TO ENTER THE CALIBRATION PARAMETER .....28

12.2 USING “2006” TO ENTER THE SERVICE PARAMETERS...........30

13.0 REPLACEMENT PARTS AND ACCESSORIES..............................36

14.0 SERVICE INFORMATION ...............................................................38

15.0 WARRANTY INFORMATION ..........................................................40

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1.0 INTRODUCTION

• The GC series provides accurate, fast and versatile parts counting scales.

• There are 2 types of scales within the GC series ： GC indicators are

kilogram/gram scales and the GC-a indicators are changeable from pounds to kilograms if the user requires it. The indicators have the same functions except that GC-a scales have the ability to toggle between the two weighing units.

• The indicators can be set to display up to 30000 divisions

• All indicators are supplied with a RS-232 bi-directional interface and real time

clock (RTC).

• The indicator has a sealed keypad with colour coded membrane switches and

there is a large, easy to read liquid crystal type display (LCD). The LCD is supplied with a backlight.

• The indicators include automatic zero tracking, audible alarm for pre-set counts,

automatic tare, pre-set tare, an accumulation facility that allows the count to be stored and recalled as an accumulated total.

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2.0 SPECIFICATIONS

INPUT SECTION

Load Cells

Minimum 87 ohms, maximum 1120 ohms

Connection

Excitation

Sensitivity

Linearity

Zero Range

Signal range

ADC Sensitivity

DIGITAL SECTION

Maximum Range 100 g – 30000 g

Divisions Up to 30,000

Up to 4, 350 ohm load cells

4 wire or 6 wire load cells

5Vdc

0.15uv/d

0.01% FS

0-10mv

0-40mv

Approximately 0.015 uv/ADCount

1 kg – 30000 kg

1 lb to 30000 lb

Stabilization Time

Operating

Temperature

Power supply 230 VAC 50/60 Hz

12VDC @ 800ma adaptor for CKa type units.

Battery Internal rechargeable battery

Calibration Automatic External

Display 3 x 6 digits LCD digital displays

Indicator

Housing

2 Seconds typical

-10°C - 40°C

14°F - 104°F

ABS Plastic

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Overall

Dimensions

(wxdxh)

Net Weight

Applications

Functions

Interface

Date/Time

260 x 110 x 170mm

10.2” x 4.3” x 6.7”

1.1 kg / 2.4 lb

Counting Scales

Parts counting, weighing, accumulating memory,

pre-set count with alarm

RS-232 bi-directional interface

English, German, French, Spanish selectable text

Real Time Clock (RTC),

To print date and time information

(Dates in year/month/day, day/month/year or

month/day/year formats- Battery backed)

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3.0 INSTALLATION

3.1 UNPACKING

This indicator must be connected to a load cell platform and calibrated as necessary to match the platform and user requirements. See Section 12.0 for set-up information.

The user’s application and the technical specifications of the platform or load cell will determine the necessary configuration.

3.2 LOCATING

• The scales should not be placed in a location

that will reduce the accuracy.

• Avoid extremes of temperature. Do not place in

direct sunlight or near air conditioning vents.

• Avoid unsuitable tables. The table or floor must

be rigid and not vibrate.

• Avoid unstable power sources. Do not use near

large users of electricity such as welding equipment or large motors.

• Do not place near vibrating machinery.

• Avoid high humidity that might cause

condensation. Avoid direct contact with water. Do not spray or immerse the scales in water.

• Avoid air movement such as from fans or

opening doors. Do not place near open windows or air-conditioning vents.

• Keep the scales clean. Do not stack material on

the scales when they are not in use.

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3.3 CONNECTION

This indicator must be connected to a load cell platform and calibrated as necessary to match the platform and user requirements.

The GC has a connector configured for either 4 or 6 wire load cells. Connect the load cells/platform to the indicator as shown below. The cable length should be as short as possible, using a large size wire to minimise errors due to resistance in the leads.

Figure 1A shows the connections to a 6 wire load cell. Figure 1B and 1C show 2 different ways to attach a 4 wire load cell, 1B uses a 6 conductor cable to go from the indicator to the platform or load cell where it connects to the 4 wires from the load cells.

The Excitation and sense wires are connected internally in the GC indicator.

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4.0 KEY DESCRIPTIONS

Keys

[0-9, .] Numeric entry keys, used to manually enter a value for tare weights, unit

weight, and sample size.

[CE] Used to clear the unit weight or an erroneous entry.

[M+] Add the current count to the accumulator. Up to 99 values or full capacity of

the weight display can be added. Also prints the displayed values when Auto print is switched off.

Functions

[MR] To recall the accumulated memory.

[Pst]

To set the upper limit for the number of items counted. When this upper limit is exceeded the scale will sound the beeper.

[Print] To print the weight/ unit weight and count to a PC or printer using the RS-232

interface. Print the totals from memory when [MR] is pressed first.

[Smpl] Used to input the number of items in a sample.

[U.Wt./Units] Used to enter the weight of a sample manually.

Select the weighing unit when the “Unit Weight” display is at zero if enabled.

[Tare] Tares the scale. Stores the current weight in memory as a tare value, subtracts

the tare value from the weight and shows the results. This is the net weight. Entering a value using the keypad will store that as the tare value.

[Zero] Sets the zero point for all subsequent weighing to show zero.

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5.0 DISPLAYS

The scales have three sections. These are “Weight”, “Unit Weight” and “Count”.

The LCD design is:

WEIGHT UNIT WEIGHT

5.1 WEIGHT DISPLAY

It has 6-digit display to indicate the weight on the scale.

Net Weight Display, "Net"

Stability indicator, symbol

Zero indicator, 0 symbol

The weighing unit: kg, lb

COUNT

5.2 UNIT WEIGHT DISPLAY

This display will show the unit weight of a sample. This value is either input by the user or computed by the scale. The unit of measurement is grams if grams if kilograms is selected for the weighing unit, or pounds if pounds is selected.

5.3 COUNT DISPLAY

This display will show the number of items on the scale or the value of the accumulated count. See the next section on OPERATION.

5.4 OTHER SYMBOLS

• The symbol, when there is insufficient number of samples to

accurately determine the count.

• When the unit weight is not large enough to determine an accurate count,

the symbol will be on.

• In both cases the scale continues to operate and the indications are to

alert the user for a potential problem.

• If a preset count has been stored the symbol will be on.

• A low battery symbol will turn on if the battery should be recharged.

• The Lo, OK, Hi symbols will be used when the preset count has been set.

• The symbol “Mem” will be seen when the internal memory has a record of

previous weighings stored in it.

6.0 OPERATION

NOTE: GC-a Scales only

SETTING THE WEIGHING UNIT, lb or kg

The scale will turn on displaying the last weighing unit selected, either kilograms or pounds. To change the weighing unit press the [U. Wt./Units] key when the “Unit Weight” display shows zero. If necessary press the [CE] key to clear the unit weight before changing.

6.1 ZEROING THE DISPLAY

• You can press the [Zero] key at any time to set the zero point from which

all other weighing and counting is measured. This will usually be necessary only when the platform is empty. When the zero point is obtained the “Weight” display will show the indicator for zero, “>Z<”.

• The scale has an automatic re-zeroing function to account for minor

drifting or accumulation of material on the platform. However you may need to press [Zero] to re-zero the scale if small amounts of weight are still shown when the platform is empty.

6.2 TARING

• Zero the scale by pressing the [Zero] key if necessary. The indicator

“>Z<” will be ON.

• Place a container on the platform and its weight will be displayed.

• Press [Tare] to tare the scale. The weight that was displayed is stored as

the tare value which is subtracted from the display, leaving zero on the display. The indicators “Net” and “>Z<” will be ON.

• As a product is added only the weight of the product will be shown. The

scale could be tared a second time if another type of product was to be added to the first one. Again only the weight that is added after taring will be displayed.

• When the container is removed a negative value will be shown. If the

scale was tared just before removing the container, this value is the gross weight of the container plus all products those were removed. The indicator “>Z<” will also be ON because the platform is back to the same condition as it was when the [Zero] key was pressed last.

6.2.1 Preset Tare

• The user can enter a preset tare value if the display is at zero or gross

weight. Enter the value for preset tare using the keypad, then press the [Tare] key to set the preset zero value.

• If the display was at zero the weight will show a negative value equal to

the preset tare value entered and the “Net” indicator will be on. If a weight was on the platform then the preset value will be subtracted from the weight, displaying the NET weight only.

6.3 PARTS COUNTING

6.3.1 Setting Unit Weight

In order to do parts counting it is necessary to know the average weight of the items to be counted. This can be done by weighing a known number of the items and letting the scale determine the average unit weight or by manually inputting a known unit weight using the keypad.

A. Weighing a sample to determine the Unit Weight

To determine the average weight of the items to be counted, you will need to place a known quantity of the items on the scale and then to key in the number of items being weighed. The scale will then divide the total weight by the number of items and display the average unit weight. Press [CE] anytime to clear the unit weight.

• Zero the scale by pressing the [Zero] key if necessary. If a container is to

be used, place the container on the scale and tare by pressing [Tare] as discussed earlier.

• Place a known quantity of items on the scale. After the weight display is

stable, enter the quantity of items using the numeric keys and then press the [Smpl] key.

• The number of units will be displayed on the "Count" display and the

computed average weight will be shown on the "Unit Weight" display.

• As more items are added to the scale, the weight and the quantity will

increase.

• If a quantity which is smaller than the sample is placed on the scale,

then the scale will automatically enhance the Unit Weight by recalculating it. To lock the Unit Weight and avoid re-sampling, press [U.

Wt./Units].

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