Gram AHV Series User manual

SERIES

AHV

AH-300V / AH-600V / AH-1200V

AH-1500V / AH-3000V

OPERATION MANUAL

INDEX English

Precautions before using the balance 4

Name and type of the instrument 5

Keys and display description 5

Keys function 6

Display 7

Function 7

Power-Up 8

Weighing mode 8

Display range 8

Zero-Setting 8

Semi-automatic zero-setting 8

Zero-tracking 8

Initial zero-setting 9

Tare 9

Semi-automatic tare 9

Units selection 10

Overload alarm 10

Counting mode 10

Percentage weighing mode 11

Calibration procedure 12

Parameters setting 13

Ratio span calibration 15

Weight span calibration 16

Weight loading 17

Parameters set-up 18

Auto-shut off time 18

Transmitting mode 19

Label format 21

Baud rate 21

Data bits 22

Unit weight re-computing in counting mode 23

Blacklight type 23

Recovery of the default values from memory 24

Specification of output interface 24

Error messages 26

Technical data 26

Guarantee 27

ENGLISH

PRECAUTIONS BEFORE USING THE BALANCE

For safe and dependable operation of this balance, please comply with the

following safety precautions:

• Verify that the input voltage printed on the AC Adapter and the plug type

matches the local AC power supply.

• Make sure that the power cord does not pose a potential obstacle or

tripping hazard.

• Disconnect the scale from the power supply when cleaning the scale.

• Do not operate the scale in hazardous or unstable environments.

• Do not immerse the scale in water or other liquids.

• Do not drop loads on the platform.

• Use only approved accessories and peripherals, as available.

• Operate the scale only under ambient conditions specified in these

instructions.

• Service should be performed by authorized personnel only.

• It must not be bumped against by other items or overloaded with

excessively heavy weights (The load must not exceed the maximum

capacity of the balance).

• Give a warm-up for 30 mins before using the scale.

NAME AND TYPE OF THE INSTRUMENT

The AH-V model weighing balance is a self-indicating weighing scale of

Class II with single weighing range, an external AC mains adapter, and an

internal rechargeable battery.

The balance consists of analogue to digital conversion, microprocessor

control, power supply, keyboard, and a weight display contained within a

single enclosure.

KEYS AND DISPLAY DESCRIPTION

The balance is equipped with 13 keys membrane keypad to control the

functions and also the ON/OFF of the balance.

Keys function

ON/OFF switch.

Function key to choose weighing, parts counting and percentage

weighing.

Units selection (8 units are available).

To take samples in parts counting mode or percentage weighing mode.

To subtract the container’s weight.

To return the display to “0”.

Confirmation key and print key.

To enter into setup mode (User Programming Setting).

To return to last menu or exit Setup Mode; extend one more digit for

the current display for 5 seconds.

Move to left.

Move to right.

Page up (Increase value).

Page down (Decrease value).

Display

When the Capacity of the balance is 600.0g, the last digit will be the auxiliary

display digit (a symbol indicating the digit):

When the Capacity of the balance is 150.00g, 300.00, 1500.0 and 3000.0g, the

last digit will be blank in normal weighing mode only if the key is pressed

to extend the display.

FUNCTION

The balance can be available for operation from mains at 110~240V (50/60Hz)

with an external AC/DC adapter with 12V output voltage and an optional

internal 6V rechargeable battery.

POWER-UP

When power up the balance, the display will first show the software version

(Ver. 1.01) for 2 seconds and then perform a self display test. Then it will

show the Calibration counting times for about 1 second. After that it will

automatically establish the current weight as a new zero reference point.

WEIGHING MODE

Display range

The display can show weight from –Max (Tare weight) to Max+9e (Gross

weight).

Zero-Setting

Zero-setting range: ±2% of Max

Zero-setting is only available when the load receptor is not in motion (The

display is stable).

Semi-automatic zero-setting

When there is a minor weight displayed (without load on the pan), press

key to return to the display to zero, then the Zero symbol appears which

indicates that the display now is at the zero point.

Zero-tracking

The instrument is equipped with a zero-tracking feature which operates at a

speed of ±0.25e/s and only when the indicator is at gross zero and there is no

motion in the weight display.

Initial zero-setting

Initial zero-setting range: ±10% of Max

When the initial zero-setting range is below -10% of Max, the display shows

“-------” and the buzzer sounds. To return the display to normal mode,

please adding more weights until the initial zero-setting range is between

±10% of Max.

When the initial zero-setting range is beyond +10% of Max, the display shows

“-------” and the buzzer sounds. To return the display to normal mode, please

take off weights until the initial zero-setting range is between ±10% of Max.

Tare

The instrument is provided with a semi-automatic subtractive tare.

Semi-automatic tare

Press key to subtract the current displayed weight value as the tare

weight value (Consecutive tare operations are permitted). The NET symbol

appears and the display will show a net weight of the object to be weighted.

To clear the tare value, please remove the container on the pan, then the

display will show a minus tare weight value and press key again.

Note:

1. When performing the tare operation(s), make sure the instrument is in stable.

2. If consecutive tare operations have been performed, to clear the tare value,

please remove all the containers on the pan first and then press key.

3. Tare range is the full capacity of balance for all models.

Units selection

Press the key to choose the weighing units and the display will be

changed to the new value with the units shown. There are up to 8 units of

weight that can be enabled.

Overload alarm

When the weight on the pan exceeds the Max. capacity, the display will show

“--OL--” at the same time the buzzer sound. Please take off the weight at

once. Otherwise the load cell will be easy to be damaged.

Counting mode

In normal weighing mode, press the key to enter into parts counting

mode. The display shows as below:

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