AWS PN-Series User manual

INSTRUCTION
MANUAL
PN-Series
Precision Balance
©2010 American Weigh Scales, Inc.
American
Weigh
Scales, Inc.
ON/OFF
Level
UNIT
TARE
MODE CAL
Tare
ON/OFF
Level
UNIT
TARE
MODE CAL
Tare
ON/OFF
Level
UNIT
TARE
MODE CAL
Tare
ON/OFF
Level
UNIT
TARE
MODE CAL
Tare

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PN-Series Manual
TABLE OF CONTENTS
1. INTRODUCTION
1.1 PN-A Balance Stucture.........................................................................P. 3
1.2 PN-B, PN-C Balance Stucture...................................................................P. 4
1.3 Technical Specications .......................................................................p. 7
2. INSTALLATION
2.1 Part List .......................................................................................p. 6
2.2 Unpacking ....................................................................................p. 6
2.3 Installation Instructions .......................................................................p. 6
2.4 Turning on the Balance and Self-testing........................................................p. 6
2.5 Underweighing ...............................................................................p. 7
3. OPERATION
3.1 Sample Weighing .............................................................................p. 8
3.2 Weighing with a Container ....................................................................p. 8
3.3 Unit Switching ................................................................................p. 8
3.4 Parts Counting ................................................................................p. 8
3.5 Calibrating the Balance ........................................................................p. 8
3.6 Linear Calibration .............................................................................p. 9
4. APPENDIX
4.1 RS232 Serial Data Communication .............................................................p. 10
4.2 Serial Number.................................................................................p. 10
4.3 Commands ...................................................................................p. 10
4.2 Proper Care & Maintenance....................................................................p. 10
4.3 Troubleshooting ..............................................................................p. 11

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PN-Series Manual
ON/OFF
Level
UNIT
TARE
MODE CAL
Tare
ON/OFF
Level
UNIT
TARE
MODE CAL
Tare
ON/OFF
Level
UNIT
TARE
MODE CAL
Tare
ON/OFF
Level
UNIT
TARE
MODE CAL
Tare
1.1. PN-Series (non draft-shield models)
1Weighing Pan
2Leveling Foot
3Bubble Level
4ON/OFF Button
5UNIT Button
6TARE Button
7MODE Button
8CAL Button
9TARE Button
10 Weight Display
Figure 1.1
1
2
3
4
5
6
7
8
9
PN-2100B, PN-510A Platform
10

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PN-Series Manual
ON/OFF
Level
UNIT
TARE
MODE CAL
Tare
1.2. PN-Series (draft-shield models)
1Draft Shield
2Leveling Foot
3Bubble Level
4ON/OFF Button
5UNIT Button
6TARE Button
7MODE Button
8CAL Button
9TARE Button
10 Weight Display
11 Weighing Platform
12 Sliding Door Handle
Figure 1.2
1
2
3
4
5
6
7
8
9
10
11
12

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PN-Series Manual
1.3. Technical Specications
Model PN-510A PN-2100A PN-6100A PN-210B
Max. Capacity 510g 2100g 6100g 210g
Readability 0.1g 0.01g
Repeatability ±1d
Linearity ±2d
Span Calibration Weight 250 g 1000 g 3000 g 100 g
Linear Calibration Weights 500 g, 250 g 2000 g, 1000 g 6000 g, 3000 g 200 g, 100 g
Response Time 2~3 sec.
Pan Size Ø 5.0 in Ø 5.4 in 6.3 x 7.4 in Ø 5.0 in
Dimensions 11.0 x 7.9 x 3.0 in 11 x 7.9 x 10.4 in
Draft-shield No No No Yes
Net Weight 4.4 lb 5.7 lb 8.8 lb
Power Requirements One 9V Battery or AC Adapter Input:120V 60hz / Output: 9V 200mA (included)
Rechargeable Battery 6V 1.3Ah (Optional)
Output Interface Bi-Directional RS232
Model PN-610B PN-2100B PN-201C
Max. Capacity 610g 2100g 200g
Readability 0.01g 0.001g
Repeatability ±1d
Linearity ±2d
Span Calibration Weight 300 g 1000 g 100 g
Linear Calibration Weights 600 g, 300 g 2000 g, 1000 g 200 g, 100 g
Response Time 2~3 sec.
Pan Size Ø 5.0 in Ø 5.4 in Ø 3.1 in
Dimensions 11 x 7.9 x 10.4 in 11.0 x 7.9 x 3.0 in 11 x 7.9 x 10.4 in
Draft-shield Yes No Yes
Net Weight 9.7 lb 13.2 lb 9.0 lb
Power Requirements One 9V Battery or AC Adapter Input:120V 60hz / Output: 9V 200mA (included)
Rechargeable Battery 6V 1.3Ah (Optional)
Output Interface Bi-Directional RS232

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PN-Series Manual
2. INSTALLATION
2.1. Part List
Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 pc.
Weighing Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 pc.
Draft Shield (Model PN-210C only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 pc.
Calibration Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0-2pcs
(depending on model)
AC Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 pc.
RS232 Cable ( DB9M to DIN5M ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 pc.
Instruction Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 pc.
Warranty Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 pc.
2.2. Unpacking
Carefully unpack the balance and remove it from its styrofoam supports. You may want to keep the original
box and packing materials for storing the balance when not in use.
If the balance is damaged contact the supplier immediately. Keep all packing materials as they were when
you received them.
2.3. Setting Up the Balance
Place the balance on a level surface, free of vibration.
For the PN-C Series, there is a red security screw that
must be loosened before rst use. Remove any tape
used to hold the glass doors secure in shipping and
carefully set the scale platform into place (See Fig.
2.3a and 2.3b). You may want to keep the original
box and packing materials for storing the balance
when not in use.
If the balance is damaged contact the supplier
immediately. Keep all packing materials as they were
when you received them.
Security Screw
(PN-C only)
Platform
Mount
Draft Ring
(PN-C only)
Weighing
Platform
Weighing
Platform
Fig. 2.3b (PN-B, PN-C)
Fig. 2.3a (PN-A)

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PN-Series Manual
2.4. Turning on the Balance and Self-testing
1. Connect the AC adapter to an available wall socket and plug the other end of the cable into the balance.
2. Press the ON / OFF key to turn the scale on. A display test will be performed (5 seconds).
3. Once the display shows “0.0g” the balance is ready to use.
4. To turn the scale o, press the ON / OFF key.

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PN-Series Manual
3. OPERATION
3.1. Sample Weighing
1. Press TARE / ZERO to make the balance return to zero.
2. Load the sample onto the scale pan.
3. The weight is stable when g (depending on which weighing unit is active) appears on the display.
3.2. Weighing with a container
Sometimes it is necessary to weigh an object (such as a liquid) using a container. To display just the weight
of the contents (net weight) and not the whole combined weight (gross weight), the TARE button is used.
1. Place an empty container on the weighing pan.
2. Once the weight stabilizes, press the TARE / ZERO key briey. The display will return to zero.
3. Add the sample to the container.
4. The weight is stable when“o”appears in the top right corner of the display.
3.3. Unit Switching
This balance has 10 possible weighing units. They are gram (g), carat (ct), pound (lb), ounce (oz), troy ounce
(oz), grain (GN), pennyweight (dwt), Newton (N), Tola (T), and T/A/R. Follow these instructions to change the
weighing unit:
1. Press the UNIT button.
2. The weighing unit will cycle between the dierent weighing units with each press of the button.
3.4. Parts Counting
With items of uniform weight (ie. all the pieces are of equal weight value) it is possible to use this scales parts
counting feature to quickly and accurately obtain a piece count. To use the parts counting feature, follow
these instructions:
1. Press the MODE key until the display shows“pcs” to indicate parts counting mode.
2. The display will show“10 pcs” to indicate that you should place a sample quantity of 10 pieces onto the
platform. You may change the sample size by pressing the “CAL” button. Possible sample sizes are 10, 20, 50,
100, 150, 200, 250, and 500.
3. Press MODE again once you have selected the sample quantity placed on the platform.
4. You can now add any number of pieces to the platform (or container) and the display will show a count.
5. To exit counting mode press the MODE key.
Notes: The larger the sample size used, the more accurate the count will be. Tare can be used in this mode.
The reference sample is not stored upon exiting parts counting mode.
3.5. Calibrating The Balance
The balance may need to be calibrated in certain situations such as:
• Before weighing for the rst time
• After the balance has not been used for some time
• If the balance location has changed
• If ambient temperatures have changed greatly
1. Prepare the calibration weight (See Section 1.3 for required weight).

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PN-Series Manual
2. Clean the weighing pan and press TARE to re-zero the balance.
3. When the balance is stabilized press and hold the CAL button for 5 seconds.
4. The display will show“-CAL-” then the required weight will ash on the display.
5. Place the calibration weight onto the center of the platform and wait for the display to stop ashing.
6. You may now remove the weight. The scale will return to normal weighing mode
3.6. Linear Calibration
Linear calibration adjusts the balance at two or more points, rather than just one. To enter linear calibration,
follow these steps:
1. Prepare the calibration weights (See Section 1.3 for required weight).
2. Clean the weighing pan and press TARE to re-zero the balance.
3. When the balance is stabilized, press and hold the CAL button for 5 seconds.
4. The display will show“-CAL-”, then the standard calibration weight will ash on the display.
5. At this point, press and hold the MODE button for 5 seconds.
6. The display will ash the rst required calibration weight for linear calibration. Place the required weight
onto the center of the platform.
7. Once the weight is accepted, the display will ash the next required calibration weight. Place the required
weight onto the center of the platform. The weights value will be displayed when it is accepted.
8. When the last required calibration weight is removed, the display will return to zero to indicate that
calibration is complete.

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PN-Series Manual
4. APPENDIX
4.1. RS232 Serial Data Communication
This balance has a Bi-Directional RS232 port for communication with a PC. When connected to a computer,
the weight value can be sent to the computer and commands can be sent to the balance
Transfer Format: Asynchronous
Communication Protocol: 1 start bit, 8 data bits, 1 stop bit
Baud Rate: 9600
Parity: None
Flow Control: Xon/Xo
When sending the weight request command to the scale, the scale’s serial port will reply with the current
weight in ASCII format with the following structure:
1 2 3 4 5 6 7 8 9 10 11 12 13
Weight Data Unit
Example String: “ 0 0 0 1 2 3 . 4 5 c t ”
Hex Output: 11h 20h 30h 30h 30h 31h 32h 33h 2Eh 34h 35h 63h 74h 20h 20h 13h
Meaning: 123.45ct (carats)
When sending a command to the scale such as Tare, the scale’s serial port will reply with <ACK>
NOTE: The CD included with the balance is meant for demonstration purposes only. To install, simply copy
the program les to your computer and launch Weight Display.exe. By default, the program listens for
weight data on serial port1.
4.2. Serial Number
When communicating with the balance from a PC, a serial number (from 1-100) is used to identify the
balance. By default, the serial number is 001. To change the serial number, press and hold the UNIT and
MODE buttons together until the display shows “No - ###” (### stands for the serial number). Tap the CAL
button to change the serial number from 1-100. Press the MODE button when you are nished.
4.3. Commands
The following commands can be sent to the balance:
Command Function Example
serial no. (hex) + s Request weight data example: 01h s hex: 01:73
serial no. (hex) + v Enter Calibration Mode example: 01h v hex: 01:76
serial no. (hex) + c Enter Counting Mode example: 01h c hex: 01:63
serial no. (hex) + u Change weighing unit example: 01h u hex: 01:75
serial no. (hex) + t Tare the balance (zero) example: 01h t hex: 01:74

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PN-Series Manual
4.4. Care & Maintenance
Please read all operating instructions carefully before use. Scales are precision instruments and should
always be handled with proper care. To ensure years of reliable service, keep these simple tips in mind:
•Donotexceedthescalesmaximumcapacity.Overloadingyourscalecanpermanentlydamageit!
•Avoidexposuretoextremeheatorcold.Scalesperformbestatnormalroomtemperature.Iftemperatures
have changed dramatically, recalibration may be necessary.
•Allowyourscaletowarmupforthreehoursbeforeperforminginitialcalibration.
•Storeyourscaleinaclean,drylocation.Dust,dirt,andmoisturecanaccumulateontheweighingsensors
and electronics causing inacuracy or malfunction.
•Avoidstaticelectricitysources,astheycanhaveanadverseeectontheweighingsensors.
•Alwaysweighonaatandlevelsurface,freefromvibrationsanddrafts.Thecornerofaroomisusuallythe
most stable.
•Gentlyapplyallitemstobeweighed.Donotdropitemsontotheweighingplatform.
•Avoiddroppingyourscale.Thewarrantydoesnotcoverdamageduetoroughtreatmentoroverload.
•Keeptheweighingpancleanusingasoftcloth.Donotuseharshchemicals.
4.5. Troubleshooting
Problem: The display shows “F - - -”
Solution: 1. The weight on the scale is in excess of the rated capacity. Remove the excess weight.
2. The balance may be improperly calibrated. Try recalibration (Section 3.5)
Problem: The display uctuates.
Solution: 1. Vibration or wind is interfering with the measurement. Try using the balance in a more
stable location.
2. Electronic balances can be aected by static electricity and radio waves. Make sure the
area is static free and away from any strong radio wave emitting devices such as cordless
phones.
3. The item on the platform is in motion. Wait for it to stabilize or try supporting it with
whatever means is convenient.
Problem: The scale is weighing inaccurately.
Solution: 1. The scale requires recalibration. Follow the steps in Section 3.7.
2. The TARE feature has been used improperly. Remove the items and try again.
3. The balance is not level. Adjust the leveling feet until the bubble level is centered.
4. Battery power may be low (the“ ” symbol will appear). Replace the batteries.