Gram AHV Series, AH-300V, AH-600V, AH-1200V, AH-1500V Operation Manual

SERIES

AHV

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

AH-1500V / AH-3000V

OPERATION MANUAL

2

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

3

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

4

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.

5

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.

6

Keys function

F

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).

7

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.

8

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

9

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.