PT PT520 User Manual

PT520

Weighing Scale

User Manual

Rev. 8.10.29

Innovative Measurement Electronics

Thank you for purchasing a PT Electronic Digital Scale. In order to use the

scale properly, please read this Manual carefully before use. If you have a

problem concerning the scale, please contact your supplier.

PT regularly updates and issues new information regarding products, the

most up-to-date information and additional detailed information is located on

the PT web site.

www.pt-global.com

PT520 User Manual Rev 8.10.29

1. TABLE OF CONTENTS

1. TABLE OF CONTENTS ............................................................................................................... 1

2. PREPARATION ........................................................................................................................... 2

2.1.Before using the scale ....................................................................................................... 2

2.2.Preparing the scale for use ............................................................................................... 2

3. FEATURES AND SPECIFICATIONS ........................................................................................... 3

3.1.Features ............................................................................................................................ 3

3.2.Specifications .................................................................................................................... 3

3.3.Product Package ............................................................................................................... 3

3.4.Selectable Weight Unit ...................................................................................................... 3

3.5.Error Messages ................................................................................................................. 3

4. DISPLAY AND KEYBOARD FUNCTIONS .................................................................................. 4

4.1.Basic Operation ................................................................................................................. 4

4.1.1.Switching the scale on / Re-zeroing ................................................................... 4

4.1.2.Selecting the desired unit ................................................................................... 4

4.1.3.Using TARE to deduct the weight of the container ............................................. 5

4.1.4.Net / Gross displayed weight switching ............................................................... 5

4.1.5. Simple counting Function .................................................................................. 5

5. ADVANCED FUNCTIONS ........................................................................................................... 6

5.1.Calibration ......................................................................................................................... 6

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PT520 User Manual Rev 8.10.29

2. Preparation

2.1. Before using the scale

1. Please keep the scale in a cool and dry place. Do not store at high temperatures.

2. Do not allow any liquids to come into or contact with the scale. If this has happened, wipe the scale dry with a cloth.

3. Avoid objects impacting with the scale. Do not drop loads onto the scale or subject the weigh pan to any strong shock loads. Do not leave loads on the scale for extended periods.

4. The load placed on the platform must not exceed the maximum weighing capacity of the scale. The LCD display will blank if the scale is overloaded.

5. If the scale is not going to be used for some time, please clean it and store it in a plastic bag in dry conditions. A desiccant sachet may be included to prevent moisture build up.

2.2. Preparing the scale for use

1. Unpack the scale carefully and place it on a firm surface. Turn the scale over and remove the single transit locking screw located underneath if it is present.

2. For accurate weight readings locate the scale on a firm level surface free from vibrations and adjusted to be level with the adjusting feet. The installer can use a builders level or similar on top of the platform. The bubble should be inside the black marks.

3. Install the indicator (display) in a convenient position by laying it flat or unhinging the stand recessed into the back of the display for desk mounting. It is possible to disconnect the AC adapter and operate the scale on the internal battery so that the PT520 becomes truly portable.

4. Avoid operating the scale in direct sunlight or drafts of any kind.

5. Remove any weight that might be on the platform before the scale is switched on and avoid leaving weight on the platform for long periods of time.

6. Once the scale has been switched on, it will go through a LCD display test and then rezero to be ready for use.

7. For best accuracy switch the scale on for 1~2 minutes before use.

8. Please note that if the battery is flat the indicator will power off and the battery needs to be changed or the mains adapter used.

9. All goods weighed should be placed in the centre of the platform for accurate weighing. The overall dimensions of the goods being weighed should not exceed the size of the weigh pan.

10. The acceleration due to gravity varies around the world. The force on the scale is a product of the gravity value and the mass placed on the scale to weigh. As the gravity value can vary with different world locations so can the weight displayed for the same mass. The Scales have been calibrated for a gravity value (acceleration due to gravity) of g=9.799 m/ s2. Discrepancies in readings at the location of installation could be due to a different gravity value and adjustment of the scale calibration or gravity value may be needed.

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PT520 User Manual Rev 8.10.29

3. FEATURES AND SPECIFICATIONS

3.1. Features

●

Multi-function operation: Fast weighing operation; 50% tare range; Net / Gross weight display; Auto power-off.

●

Dual-weighing units: kilogram (kg) pound (lb). Simple Counting.

●

User-friendly design: Simple calibration; Large LCD display (57mm x 20mm).

●

Dual-power source: The power source can either be from AC / DC or 9V internal battery.

●

Remote indicator with desk stand and 1m of connecting cable.

3.2. Specifications

Model Capacity Division Resolution Min. Cap. PT520-50 50kg (110 lb) 10g (0.02 lb) 1/5000 (1/5500 lb) 200g

PT520-100 100kg (220 lb) 20g (0.05 lb) 1/5000 (1/4400 lb) 400g PT520-150 150kg (330 lb) 50g (0.10 lb) 1/3000 (1/3300 lb) 1000g

Operating Temperature 0°C ~ 40°C (32°F ~ 104°F) Power Source DC 9V battery (PP3) or AC adaptor (9V 500mA, 2.5x5mm

centre negative polarity) Indicator 140mm H x 92mm W x 25mm Thick, 5 digit LCD Weigh pan Size 300 x 300 mm x 80mm H

3.3. Product Package

●

Scale 1 off

●

User manual 1 off

●

AC adapter 1 off

●

9V alkaline battery 1 off

●

Please contact to your supplier, if any of the items described above are missing.

3.4. Selectable Weight Unit

Kilogram (kg) 1 kg = 1000 g Pound (lb) 1 lb = 453.59237 g PCS 10, 20, 50, 100

3.5. Error Messages

There are no error messages. The scale will blank the display if it goes over range. Remove the load for the display to show the weight again. The scale will also blank the display if the TARE/ZERO key is pressed while the reading is unstable. Remove the load or wait for the load to become stable for the display to show the weight again.

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PT520 User Manual Rev 8.10.29

4. DISPLAY and KEYBOARD FUNCTIONS

: The key to switch the scale off.

: ON/UNIT key. When the scale is off, press the key to switch it on. When the scale

is switched on, press this key to change the units from kg >lb, lb >PCS, PCS > kg

: TARE/ZERO key. Press the key to deduct the weight of the container. The tare key

is not functional when the weight value shown on the display is negative or over the full scale capacity. The scale is in gross mode when it is first turned on and the tare key is functional. Once the tare key has been pressed the TARE annunciator will be displayed.

:NET/GROSS weight key. The gross weight = Tare weight + Net weight

(The key is ONLY functional if a tare weight has been stored with the tare key and it will change between Net and Gross weight display with each press.)

4.1. Basic Operation

4.1.1.Switching the scale on / Re-zeroing

1. When the scale is off, press the key to turn the scale on.

2. When the scale is on and without any object placed on the weigh pan, press the

key to obtain a zero reading. The ”▼” indication points to the word ZERO

in the right hand side of the display. If the weight is equal or above one division the indicator will tare and the ”▼” indication points to the words ZERO and NET otherwise the display will show the ”▼” indication pointing to the word ZERO. To zero out one division or more turn the scale off and back on again.

4.1.2.Selecting the desired unit

1. Press the

key while the scale is on to select kilogram (kg) or pound (lb)

units, the ” ▼” indication will point to the selected unit in the left hand side of the display.

2. If counting function is required please see section 4.1.5.

3. After power off, the active units will reset to kg. When the scale is powered on again, select lb if required.

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OFF

ON

UNIT

TARE ZERO

NET

GROSS

ON

UNIT

TARE ZERO

ON

UNIT

PT520 User Manual Rev 8.10.29

4.1.3.Using TARE to deduct the weight of the container

1. Place the container on the weigh pan. After the reading stabilizes, press

key to deduct the weight value of the container. The ”▼” indication points to the words ZERO and NET.

2. Place the object/liquid to weigh in the container, the scale will show the net weight value of the object.

3. Remove the container and weighing object, and the display shows the negative

weight value of the container. Press the key to clear the weight value of

the container, and the first ”▼” indication points to the words ZERO.

4. Tare continuously (Press key, when weight is added or deducted on the

weigh pan so the next amount added or removed can be weighed).

5. Tare value = 50% capacity (The scale can be continuously up to 50% of capacity)

4.1.4.Net / Gross displayed weight switching

1. In the tare mode, the display shows the ”▼” indication pointing to the words NET

and ZERO. Press key to show the gross weight value, and the ”▼”

indication pointing to the words NET and ZERO goes off. You may need to hold the

key until the display changes.

2. Press key again, the display shows the net weight value and the ”▼”

indication pointing to the words NET and ZERO shows again.

3. The key is ONLY functional in the tare mode (when a tare action has been

performed).

4.1.5. Simple counting Function

For best results the suggested unit weight of the item to be counted should be heavier than the division of the scale. The larger the sample quantity the better the accuracy.

1. With the scale on and in the weighing mode, place the sample quantity to be counted on the scale.

2. Press key until the display shows -PCS- then it will display 0 (Zero)

3. Press and hold the key until display shows S = 10 and then press

again to select quantity sample to be weighed. Options are 10, 20, 50, &100 .

4. Press key and wait until the display shows the sample quantity chosen.

5. The scale is now ready to count.

6. Press to return to weighing mode.

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TARE ZERO

NET

GROSS

NET

GROSS

NET

GROSS

NET

GROSS

NET

GROSS

NET

GROSS

ON

UNIT

ON

UNIT

ON

UNIT

PT520 User Manual Rev 8.10.29

5. ADVANCED FUNCTIONS

5.1. Calibration

The PT520 is calibrated when it leaves PT but due to gravity varying in between localities it may be necessary to re-calibrate the scale for your location. Please follow the procedure below to achieve this.

Instructions Display Description

1. Press the [NET/GROSS] key and switch the scale on at the same time. Do not release your finger from the [NET/GROSS] key until the LCD shows the firmware version of the scale.

6.3

6.36.3

6.3

Version of the firmware

2. Press the [TARE/ZERO] key and do not release your finger from the [TARE/ZERO] key until the LCD shows

SEtUP

SEtUPSEtUP

SEtUP

SEtUPSEtUP

SEtUP

3. Press the [ON/UNIT] key once to select

0000

.

0000

4. Press the [ON/UNIT] key and do not release your finger from the [ON/UNIT] key until the LCD flashes

CAL - 1

CAL - 1CAL - 1

CAL - 1

and then shows

000.00

000.00000.00

000.00

CAL - 1

CAL - 1CAL - 1

CAL - 1

↓

000.00

000.00000.00

000.00

5. Press the [TARE/ZERO] key to shift the flashing digit to the position required.

00

0000

000000.0

.0.0

.0

0000

↓

0000

0.00

0.000.00

0.00

6. Press the [ON/UNIT] key to set the value of the digit for the standard weight that will be used to calibrate the scale. This should ideally be 75-90% of the scale capacity.

0000

0.00

0.000.00

0.00

↓

0000

3333

0.00

0.000.00

0.00

If you use a 30kg standard weight to calibrate:

●

Press the [TARE/ZERO] key to

select 0000

0000

0.00

0.000.00

0.00

●

Press the [ON/UNIT] key to set the value

to 0000

3333

0.00

0.000.00

0.00

7. Press the [NET/GROSS] key to confirm. The LCD will show an internal zero OFFSET value.

XXXXX

8. Please wait until the internal OFFSET value is stable, and then press the [NET/GROSS] key once.

The LCD will show

00000

0000000000

00000

.

00000

0000000000

00000

9. Put the standard weight (set in step 6) on the platter. The LCD will show an internal SPAN value.

XXXXX

10. Please wait till SPAN value is stable, and then press the [NET/GROSS] key once. The LCD will

flash

Good

oodood

ood

twice, and then the scale will re-boot

automatically.

Good

GoodGood

Good

↓

re-boot

automatically

!!

Note:

Please take the standard weight off the scale after

the LCD flashes

“Good

GoodGood

Good”

twice

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