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Step 3 :

Press the " CAL. Button " ( 3-3, Fig. 1 ) once again, 

display value of " 200.00 g " will flash 6 times, then the 

calibration procedures are finished completely & balance 

is ready for the measurement accurately.

3) Calibration under the 100 gram standard weight

a) Power on the scale until the display show zero value.

Apply the 100 gram standard to the center of the

platform gently. If the scale is not accurate, then may

show the weight value around 100 g ( for example 99.94 g

, 100.05 g.....)

b)

Step 1 :

Press the " CAL. Button " ( 3-3, Fig. 1 ) once, 

display will show the value of " 100.00 g "

Step 2 :

Press the " CAL Button " ( 3-3, Fig. 1 ) once again, 

display value of " 100.00 g " will flash 6 times, then the 

calibration procedures are finished completely & balance 

is ready for the measurement accurately.

Consideration of Self-Calibration :

*  The internal Self-Calibration value is saved to the

internal EEPROM circuit permanently. Once power off then

power on, the calibration value will be not disappeared .

*  After make the self calibration, measure the 100 g or 200 g

standard weight again, if the display value existing few

counts deviation, it is normal. However  within few hours,

the balance will be kept under a high accuracy condition.

Those accuracy will be even better than the published

specification ( refer page 2 ).

*  Under the status of " oz " unit, still can use the weight of

100 g or 200 g to make the calibration. However the " g "
marker will disappear.

7

Summary of Contents for GM-300P

Page 1: ...E marks a step forward for you into the field of precision measurement Although this DIGITAL BALANCE is a complex and delicate instrument its durable structure developed Please read the following inst...

Page 2: ...B Button 3 3 5 Display 3 3 6 Power Switch 3 3 7 Rubber Pads 3 3 8 Battery Cover Compartment 3 3 9 DC 9V Receptacle 3 3 10 RS232 Output Socket 3 3 11 Unit Switch 3 4 PLATFORM INSTALLATION 4 5 WEIGHT ME...

Page 3: ...even power off High precision counting scale function RS 232 computer interface Accept battery or AC DC adapter power source two way power supply Built in level bubble the adjustable rubber pads Heav...

Page 4: ...100 g or 200 g standard weight to execute self calibration automatically Operating 0 to 50 32 to 122 Temperature Operating Humidity Less than 80 RH Size Cabinet 250 x 190 x 70 mm Platform Round 120 mm...

Page 5: ...3 FRONT PANEL DESCRIPTION Side view Bottom view Front view Back view Fig 1 3...

Page 6: ...CAL Button function A Button 3 4 Tare Button function B Button 3 5 Display 3 6 Power Switch 3 7 Rubber Pads 3 8 Battery Cover Compartment 3 9 DC 9V Receptacle 3 10 RS232 Output Socket 3 11 Unit Switc...

Page 7: ...position will set to gram unit the right down corner of LCD will show the g marker Slide the Unit Switch to the left position will set to oz unit 3 Turn the Power Switch 3 6 Fig 1 to the On position 1...

Page 8: ...on again 6 SELF CALIBRATION 1 Please prepare the following optional Standard Weight 200 gram standard weight WT 200 optional or 100 gram standard weight 2 Calibration under the 200 gram standard weig...

Page 9: ...e again display value of 100 00 g will flash 6 times then the calibration procedures are finished completely balance is ready for the measurement accurately Consideration of Self Calibration The inter...

Page 10: ...d is present then release the finger away from function A Button 3 a The bottom left corner of LCD will show the COUNT marker at the same time the LCD will show no of sample units from 10 20 50 100 in...

Page 11: ...isplay will flash twice and freeze the set counting no then take away the sample units Now the balance is ready for counting the sample counting units already change to new value Consideration Under t...

Page 12: ...mpartment replace the battery cover 9 DC 9V AC DC ADAPTER OPERATION Adapter is optional accessory 1 The scale will also be operated by the household ACV power source 110 220 240 ACV with a DC 9V Adapt...

Page 13: ...9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Each digit indicate the following status D15 Start Word D14 4 D13 1 D12 D11 Annunciator for Display g 57 oz 58 count 30 D10 Polarity 0 Positive 1 Negative D9 Decimal Point...

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