Nova-Tech GKa Indicator User Manual

Adam Equipment

GK INDICATOR

(P.N. 9264, Revision K1, July 2011)

V1.17 GK-H scales for Europe

V2.25 EC Approved scale

V3.32 GK scale for Europe

V4.07 GK-H scale for USA

V5.32 GK scales for USA

Easy Reference:

Model name of the indicator:

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. INTRODUCTION..................................................................................... 3

2. SPECIFICATIONS .................................................................................. 5

3. INSTALLATION...................................................................................... 7

3.1. UNPACKING..................................................................................... 7

4. LOCATING.............................................................................................. 7

5. CONNECTION ........................................................................................ 8

6. DISPLAY............................................................................................... 11

6.1. SYMBOLS AND INDICATORS....................................................... 11

7. CALIBRATION COUNTER FOR APPROVED INDICATORS.............. 12

8. BATTERY ............................................................................................. 14

9. BACKLIGHT ......................................................................................... 14

10. AUTO POWER OFF........................................................................... 14

11. OPERATION...................................................................................... 15

11.1. ZEROING..................................................................................... 15

11.2. TARING........................................................................................ 15

11.2.1

11.2.2

MANUAL TARE...................................................................... 15

PRESET TARE (NOT AVAILABLE ON GK-M APPROVED

INDICATORS)....................................................................................... 16

11.3. WEIGHING................................................................................... 17

11.4. PARTS COUNTING..................................................................... 17

11.5. CHECK-WEIGHING..................................................................... 20

11.5.1

11.5.2

SETTING UP WHILE WEIGHING.......................................... 21

SETTING UP WHILE PARTS COUNTING OR % WEIGHING 22

11.6. LIMITS STORING AND RECALLING.......................................... 22

11.7. PERCENT WEIGHING................................................................. 24

11.8. ANIMAL (DYNAMIC) WEIGHING................................................ 27

11.8.1

ANIMAL WEIGHING PROCEDURE....................................... 28

11.9. ACCUMULATED TOTAL............................................................. 29

11.9.1

11.9.2

MANUAL ACCUMULATION................................................... 29

AUTOMATIC ACCUMULATION............................................. 31

12. RS-232 SPECIFICATION................................................................... 32

12.1. INPUT COMMANDS FORMAT.................................................... 37

13. CALIBRATION................................................................................... 38

14. PARAMETER SETTINGS.................................................................. 39

14.1. CHECK WEIGHING PARAMETERS............................................ 39

14.2. RS-232 PARAMETERS ............................................................... 42

14.3. INDICATOR PARAMETERS........................................................ 44

14.4. PERCENT WEIGHING AND ANIMAL WEIGHING...................... 46

15. ERROR MESSAGES ......................................................................... 47

16. SERVICE PARAMETERS.................................................................. 49

16.1. ACCESS TO PARAMETERS....................................................... 49

16.2. USING “2006” TO ENTER THE SERVICE PARAMETERS ........ 50

16.2.1

16.2.2

16.2.3

16.2.4

16.2.5

16.2.6

16.2.7

16.2.8

16.2.9

F1 -CALIBRATION................................................................. 52

F2–DECIMAL POINT POSITION............................................ 53

F3 – CAPACITY..................................................................... 53

F4 –INITIAL ZERO RANGE.................................................... 54

F5 -RE-ZERO RANGE........................................................... 54

F6 -SUCCESSIVE TARE........................................................ 55

F7 –ADC COUNTS................................................................. 55

F8 –ZERO MODE.................................................................. 56

F9 –LOW VOLTAGE DETECTION......................................... 56

16.2.10 F10 –CALIBRATION COUNT (GK-M ONLY).......................... 57

16.2.11 F10 –AUTO ZERO RANGE (NOT AVAILABLE ON GK-M) .... 57

17. REPLACEMENT PARTS AND ACCESSORIES................................ 58

18. SERVICE INFORMATION.................................................................. 59

19. APPENDIX......................................................................................... 61

1. INTRODUCTION

• The GK indicator provides an accurate, fast and versatile general

purpose indicator with parts counting, percent weighing and checkweighing functions.

• The GK has LEDs to indicate when a weight is below the low limit,

between the limits or above the high limit next to the display. These can work in conjunction with an audible alarm for check weighing as well as LCD showing LO, OK and HI.

• The GK is supplied with a RS-232 bi-directional interface and real time

clock (RTC).

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

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

• Includes automatic zero tracking, semi-automatic & pre-set tare,

accumulation facility that allows the weight to be stored and recalled as an accumulated total.

• OIML Approved models, GK-M, do not allow pounds units, have

calibration controlled by jumpers or passcodes and other limitations as noted in the manual.

2. SPECIFICATIONS

INPUT SECTION

Load Cells Up to 4 , 350 ohm load cells

Minimum 87 ohms, maximum 1120 ohms

Connection 6 wires

2 excitation, 2 sense, 2 signal Excitation 5Vdc Sensitivity 0.15uv/d (GK-M, 1.5uv/e) Linearity 0.01% FS Zero Range 0- 10mv Signal range 0-40mv ADC Sensitivity Approximately 0.02 µv/ADC count DIGITAL SECTION Maximum Range Typically 1kg – 30000kg Divisions Up to 30,000, (GK –M, 3000 or less) Weigh units kg / g for Europe, Asia, Africa

kg / g / lb / oz / lb:oz for USA

kg only for GK-M series Stabilisation Time 2 Seconds typical

Operating Temperature Power supply 230 VAC 50/60 Hz

Battery Internal rechargeable battery

Calibration Automatic External Display 6 digits LCD digital displays

Indicator Housing ABS Plastic

-10°C - 40°C

14°F - 104°F

12V 800ma adaptor for USA verisons

with capacity tracker and symbols for units

Overall Dimensions (wxdxh) Net Weight 2 kg / 1 lb

Applications Weighing and check weighing

Functions Weighing, Check Weighing, Parts counting, check-counting, , Animal

Interface RS-232 bi-directional interface

260 x 170 x 115mm

10.2” x 6.7” x 4.5”

Weighing, Accumulating memory,

English, German, French, Spanish selectable text

For approved indicators the input specifications is limited to 1.5 µv per division and the number of divisions is limited to 3000d. Kilograms only.

3. 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 15 for set-up information.

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

4. 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.

5. CONNECTION

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

The GK has a connector configured for a 6 wire load cell. 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.

GK-M model must use the 6 wire connection and has certain limitations for wire size and length. Refer to the Approval Test Certificate for details.

8 © Adam Equipment Company 2011

Figure 1A shows the connections to a 6 wire load cell. Figure 1B shows a preferred method to attach a 4 wire load cell, using 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 together near the load cell.

For less exacting applications you can connect the excitation to the sense at the connector.

KEYPAD

KEYS PRIMARY FUNCTION SECONDARY FUNCTION

[Zero] Sets the zero point for all subsequent

weighing. The display shows zero.

[Tare] It tares the indicator and 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.

[Unit] This is used to select the weighing units

from a preset list of available units.

Escape from any setting menus

Accept the set values

Allows the weight, unit weight, and count to be seen when parts counting or to change from weight to % in percent weighing

9 © Adam Equipment Company 2011

[Low Limit]

[High Limit]

[Lim] It stores and recalls any of 10 preset limits None

[Func] This is used to select percent weighing, RS-

[Count]

It sets the limits for check weighing and allows setting of either the low limit or the high limit or both.

232 parameters, Operation of the bar graph, RTC settings, User ID and Scale ID.

Enter Parts Counting

None

None.

[Print] It is used to print the results to a PC or

printer using the RS-232 interface. It also adds the value to the accumulation memory if the accumulation function is not automatic.

[1] to [0] and [CE]

Allow entering numerical values where required, setting of limits, tare value, time and date for example.

None

10 © Adam Equipment Company 2011

6. DISPLAY

6.1. SYMBOLS AND INDICATORS

The LCD has unique symbols to indicate the following:

0

Net

kg / lb

The display is at Zero

The scale is Stable

Net weight- The scale has been tared

Symbols shown for the units

Capacity Tracker- A bar graph indicating the proportion of the scale capacity being used by the weight on the pan

Low battery

bAt LO or

pcs

HI, OK, LO

The scale is in Percent weighing mode

The scale is in Parts counting mode

The scale is in Check weighing mode

The colons “:” are used to separate pounds from ounces and for the real time clock.

11 © Adam Equipment Company 2011

Next to the LCD are a number of LED’s that show when the weight is below, within or over the limits during check weighing.

Weight LED LCD

below the low limit Amber LO

Within the limits Green OK

Above the high limit Red HI

NOTE: The LED’s can be set by the user to off, bar, spot or segment mode. See “F3 LED” in section 13.1

The LED can be set to display as a bar, increasing from Low to OK to High, a single spot increasing from Low, OK to High, or as a single bar that changes colour as the weight progresses from Low to OK to High.

7. CALIBRATION COUNTER FOR APPROVED INDICATORS

With approved (GK-M Model) indicators we have the ability to control access to the calibration or metrology parameters using a passcode to limit access. The requirements for doing this stipulate the code should be apparent and recorded in a suitable location on the indicator.

In this way if the record of the Calibration or Parameter counters do not agree with recorded settings the responsible person inspecting the indicator can take appropriate action.

The Counters are incremented any time the calibration section or the Factory parameters section have been modified.

At power on, the display will show the current software revision number followed by the message of the Calibration Count “[AL[nt” then a number i.e. “123”. The number from the counter memory. Then the Parameter Counter message of “PAr[nt” and probably a different number, i.e. “234”. The counters cannot be reset to 0, they will increment until the display can no longer hold the values. (1 to

999999). It is expected we will never have more than 1 million calibrations in the life of the machine.

Each display is held for 1-2 seconds.

The indicator will then continue to do the display test and go to normal weighing.

If during the time the counting displays are shown, the user presses the [Tare] key, the user will be given a message to enter the passcode necessary to calibrate the indicator, “P - - - - “ Enter the code “P0000” to Enter calibration or “P1000” to enter the parameters, followed by pressing the [Tare] key.

The Calibration access will allow user calibration (See section 15.1) and the parameter code will allow access to the following parameters. (see section 15.2).

“F4 Int” Initial Zero Range

“F5 rEZ” Re-Zero range

“F6 SCS” Successive Tare Enable

“F7 Cnt” Display ADC counts

“F8 Zem” Zero Mode

“F9 Lvd” Low voltage detection

Other parameters must be changed using the service parameters as described in section 15.2

8. BATTERY

• The indicators can be operated from the rechargeable battery, if

desired. The battery life is determined by the number and impendence of the load cells connected. With a single load cell and backlight disabled the life is approximately 70 hours before needing to be recharged.

• When the battery needs charging a symbol on the display will turn on.

The battery should be charged when the symbol is on. The indicator will still operate for a period of time after which it will automatically switch off to protect the battery.

• To charge the battery, simply plug into the mains power supply. The

indicator does not need to be turned on.

• The battery should be charged for 12 hours for full capacity.

• To the right of the display is a LED to indicate the status of battery

charging. When the indicator is plugged into the mains power the internal battery will be charged. If the LED is green the battery is being charged. If it is red it is nearly discharged and yellow indicates the battery is increasing the charge level. Continue to charge overnight for a complete re-charge.

9. BACKLIGHT

The backlight for the LCD can be set by the user to always off, always on or automatic (on only when the indicator is in use or a key is pressed). See setting of the parameter “S2 bL” in section 13.3.

10. AUTO POWER OFF

The auto power off can be set by the user to disable the feature or to a pre-set time interval. See setting of the parameter “S3 AoF “ in section 13.3.

11. OPERATION

11.1. ZEROING

• 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 when the platform is empty. When the zero point is obtained the display will show the zero indicator.

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

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

11.2. TARING

11.2.1 MANUAL TARE

• Zero the indicator by pressing [Zero]. The zero indicator will be on.

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

• Press [Tare] when the reading is stable. The weight that was displayed

is stored as the tare value and it is subtracted from the display, leaving zero on the display. The stable and Net indicator will be on.

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

indicator 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.

NOTE:

When the container is removed a negative value will be shown. If the indicator was tared just before removing the container, this value is the gross weight of the container plus all products which were removed. The zero indicator will also be on as the platform is back to the same condition it was when [Zero] was pressed last.

If the value to be tared is very large the scale may not allow you to tare the value as the negative value will not fit on the display area. In this case the scale will beep twice when the [Tare] key is pressed and then return to normal weighing without setting tare.

Press [Tare] or [Zero] to remove the tare value and display zero. The Net indicator will disappear.

11.2.2 PRESET TARE (NOT AVAILABLE ON GK-M APPROVED INDICATORS)

When the indicator is at zero with no weight on the platform it is possible to enter a preset tare.

• Zero the indicator by pressing [Zero]. The zero indicator will be on.

• Enter a value using the numeric keys.

• Press [Tare] to tare the indicator. The value that was entered is stored

as the tare value and it is subtracted from the display, leaving a negative number on the display.

11.3. WEIGHING

To determine the weight of a sample, first tare an empty container if used, then place the sample in the container. The display will show the weight and the unit of weight currently in use.

To change the weighing unit press the [Unit] key. The only alternative weighing unit is pounds. This can be enabled by the user in the parameters section. See section 13.3.

11.4. PARTS COUNTING

The indicator can be used to count parts based on the average weight of a sample weighed. When more parts are added the total number of parts are displayed.

• If a container is to be used, place this container on the platform before entering parts counting and press [Tare].

• Press [Cnt] to enter the Parts Counting mode. The display will show the

last sample size used. For example, “10 Pcs”.

• Either place 10 parts on the platform for determining the average piece

weight or use a different number of parts. For example, place 20 parts on the platform, press [CE] to clear the last values and then enter the value 20 using the numeric keypad.

• Press [Cnt] to weigh the samples and determine an average piece

weight.

• If the parts are too light to measure accurately, the count may become

faulty. It is suggested that the samples to be weighed should each weigh more than the resolution of the indicator.

• After the sample has been weighed the indicator will count any other

parts added by applying the average piece weight to the weight of the

parts to be counted.

• The [Tare] key works normally during this time, so it is possible to tare

the display with a container on the platform or to enter a preset tare value as described in section 10.2.2.

• During parts counting the display can be changed to show the net

weight, unit weight and number of parts by each time pressing the

[Func] key.

• To count a different sample quantity, press the [Count] key. The display

will show the last used sample size. Either use this sample size with a different part or enter a new sample size as above.

• To return to weighing, press [Unit] when “XX pcs” is displayed.

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