5 kg0.0005 kg / 0.5 g0.00002 kg / 0.02 g
25 kg0.002 kg / 2 g0.0001 kg / 0.1 g
50 kg0.005 kg / 5 g0.0002 kg / 0.2 g
Overcapacity indication (upper dashes) will occur at 9 divisions over rated
capacity or 102% of full scale capacity.
1 part in 2,000,000 (QDT
Standard digital software filtering
Seven digits of seven-segment, high-contrast black LCD, .5" (1.3 cm) high
with blue electro-luminescent backlight
15VDC at 300mA from a 117VAC 60Hz inline transformer
Optional 12VDC lead acid battery
Bidirectional RS-232 output with selectable baud rate
TM
)
Operating environment:
14° to 104° F (-10° to 40° C)
10 to 90% relative humidity, non-condensing
4PC-805 Parts Counter Service Manual
Page 5
What's In This Manual?
This manual contains the information you need to configure, calibrate and
service the PC-805 counting scale. The manual is divided into the following
sections:
• Scale Menu
• Diagnostic Menu
• Configuration Menu
• Communication
• Technical Drawings and Assemblies
Accessing Menus and
Modes
Switches not listed in Table are
irrelevant to the mode. It does
not matter what position they
are in for that particular mode.
The different modes of operation are accessed by placing the switches of
SW1 in the positions described in Table 1. Switch SW1 is located under the
scale shroud on the right side of the scale. See Figure 1. Calibration,
diagnostics, and configuration can also be accessed by pressing and
holding the PRINT key for five seconds.
Switch SW1
ONOFFMode of Operation
1, 2Normal Operation Mode
21Menu Mode (Scale, Diag., Config.)
3External Display Mode
Table 1
Switch settings
Figure 1
Switch SW1 location
5PC-805 Parts Counter Service Manual
Page 6
Scale Menu
y
y
Because a 7 segment display
cannot show all of the alphabet, the words on the display
are the closest representations
of the words they stand for that
can be accomplished. The
menus show the words as all
caps and clarified in some
instances. The explanations in
the text will use the letters and
case you will see on the
display.
The first menu you see when entering the menu mode is the Scale menu.
Follow these steps to explore the Scale menu.
1. Set SW1-2 to the ON position
and SW1-1 to the OFF position
OR hold the PRINT key for 5
seconds.The display shows SCALE. The
entire Scale menu is shown in
Figure 2 below.
2. Follow the legend at the top of
the menu to navigate through the
menu. Each item is explained on
the next pages.
To move , press the key.
To move , press the ke
To move , and to choose an option, press theke
Press key to go up one menu level.
COUNT/WEIGHT
SAMPLE
TA R E
.
ZERO
* = factory default value
.
Press any key
but
SAMPLE
to abort the
calibration process
6PC-805 Parts Counter Service Manual
Figure 2
Scale Menu
Page 7
CALib (Calibration)
A
CALib is the calibration function for the scale. Follow these steps to calibrate your scale:
The scale defaults to 10,000d
resolution after calibration.
Table 2
lternate Span Weights
Scale
Capacity
5
10
25
50
75
100
125
150
200
250
300
500
Press any key except the
SAMPLE key to abort calibration. If you abort the procedure,
Abort is displayed briefly then
CALib.
Alt 1
N/A
N/A
10
10
10
10
10
10
50
50
50
50
Alt 2
N/A
N/A
25
25
50
50
50
50
100
100
100
200
1. With CALib displayed, press the
ZERO key. . .PoUnd or 1000 g is displayed.
These are your choices for unit of
measure for the calibration test
weight.
2. Toggle between these two units
of measure by pressing the
SAMPLE key. With the unit of
measure you want displayed,
press the ZERO key. . .A weight capacity is shown on the
screen.
3. Press the SAMPLE key to scroll
through the choices of scale
capacity. With your choice
displayed, press the ZERO
key. . .LoAd 0 is displayed. Be sure all
weight is removed from the scale.
4. Press the ZERO key. . .bUSY is briefly displayed then LoAd
X. X is the amount of weight to put
on the scale for calibration. You can
scroll to an alternate weight by
pressing the ZERO key. See Table 2
at left.
During calibration the display
may show bUSY if scale
motion is detected. Wait to see
if the display clears. If not, turn
off the scale and turn back on.
Repeat the calibration procedure
ConFig (Configuration)
5. With LoAd X displayed, place X
weight on the scale and press
the ZERO key. . .bUSY is briefly displayed then donE.
The display then returns to CALib.
ConFig (scale configuration) is the next item under the Scale menu. Below
are descriptions of each item in this submenu. Use the ZERO and SAMPLE
keys as you did in the calibration section to navigate through the choices
and select the configuration items you want.
0 rAngEZero range
Choices: 100% or 2% of full capacity
Use this to set the allowable zero range.
0 StartZero Start
Choices: YES or NO
If YES is select, the scale zeros when it powers up. If NO is
selected, the scale will display the weight on the platter when it
powers up.
Azt rngAuto zero tracking range
Choices: Off, 0.5d, 1d, 2d, 3d, 5d
Use this to set the allowable zero tracking range. This will not
affect the count or sample modes.
7PC-805 Parts Counter Service Manual
Page 8
Bold selections are factory
defaults.
ovr CAPOver capacity
Choices: 102% or full capacity or 9 divisions
Use this to set the overcapacity limit.
StAblEStability
Choices: Off, 0.25d, 0.5d, 1d, 2d, 5d
Use this to set the stability limit. This is the allowable motion for
zero acceptance, tare acceptance and the stable indicator.
Off = 100d.
rESoResolution
Choices: 5k, 10k, 12.5k, 15k, 20k, 25k, 30k, 40k, 50k, 75k,
100k, 125k, 150k, 200k, 250k, 300k, 400k, 500k
Use this to set the desired scale resolution.
FiLtErFilter
Choices: Normal and Fast
Use this to set the amount of filtering needed for your situation.
Choose Fast in situations with excess vibration.
Choices: Yes, No
Use this to reset the Config. factory defaults. Calibration will not
be affected.
rEStArt (Restart)
SEAL (Seal)
done (Done)
LFiLtLFilter
Choices: 4, 5
Sets filtering of the QDT® cell. A setting of 4 is more accurate
but slows response compared to a setting of 5.
doneDone
Hit the SAMPLE key with this displayed to move back to the
ConFig display.
Restart is the next menu item. Use this to reinitialize the scale. You will need
to recalibrate if you choose yes.
Seal is the next menu item. Choose Yes if you want to disable access to the
scale menu through the front panel PRINT key. If yes is chosen and you try
to access the scale menu, SEALEd will be displayed. Choose No if you
want to leave front panel access to the scale menu available.
Done is the last menu item in the Scale menu. Press the COUNT/WEIGHT
key to return to the SCALE display.
8PC-805 Parts Counter Service Manual
Page 9
Diagnostic Menu
A
AZT
Figure 3 shows the Diagnostic menu.
To move , press the key.
To move , press the key.
SAMPLE
TARE
To move , and to choose an option, press thekey.
Press key to go up one menu level.
shows voltageshows raw
compression
crystal count
Lets you
check key
function
COUNT/WEIGHT
tension
crystal
count
shows high
resolution with
ZT on
digital count
shows high
resolution w/o
Figure 3
Diagnostic menu
performs
a serial
loopback
test
ZERO
shows model #,
software
revision level
and performs a
display segment
test
A PC-805 with the backlight
enabled and a fully charged
battery may be expected to last
12 hours before recharging is
necessary. With the backlight
disabled the battery will last
approximately 24 hours and
take about eight hours to
recharge.
Access the diagnostic menu by following the instructions in the section
Accessing Menus and Modes. Below are explanations for each of the items
in this menu. With the test name displayed, press the ZERO key to perform
the test.
BAttERYBattery
Choose this to display the current battery voltage. Battery
voltage will usually read from 11 to 13 volts. The Lo Bat annunciator will show up when voltage drops to 11.5 volts. The scale
will shut off when voltage is 10 volts. While recharging, this
display will show 13-14.5 volts and if AC powered the display will
show approximately 14.5 volts.
C CRYStCompression Crystal
Choose this to display the raw frequency from the compression
crystal in the Quartzell
scale should be as stable as the other crystal frequency and
within 10% of each other. This number should increase as
weight is applied to the scale. Press the ZERO key to end the
test.
t CRYStTension Crystal
Choose this to display the raw frequency from the tension
crystal in the Quartzell
scale should be as stable as the other crystal frequency and
within 10% of each other. This number should decrease as
weight is applied to the scale. Press the ZERO key to end the
®
. A typical count with no load on the
®
. A typical count with no load on the
9PC-805 Parts Counter Service Manual
Page 10
test.
CountCount
Choose this to display the raw, digital counts from the
Quartzell
TM
. Count should be approximately 100,000-200,000
and as stable as the crystal counts.
SERIALChoose this to perform a serial loopback test. You must connect
the transmit and receive lines together for this test to work.
Display will show pass or fail.
dISPLAYDisplay
Choose this to display the model number, software version part
number and revision and to perform a display segment test.
bUttonSButtons
Choose this to test the keys of the front panel. Each key press is
spelled out in the display to show it is functioning properly. The
COUNT/WEIGHT key will return the display to bUttonS.
HI RESAHigh resolution with AZT enabled
Choose this to display weight data with 1,000,000 count resolution. AZT is enabled during this test. Press the SAMPLE orCOUNT/WEIGHT key to stop the test.
HI RESnHigh resolution with no AZT
Choose this to display weight data with 1,000,000 count resolution. AZT is disabled during this test. Press the SAMPLE orCOUNT/WEIGHT key to stop the test.
10PC-805 Parts Counter Service Manual
Page 11
Config. (Configuration) Menu
The Config. menu is shown in Figure 4. Access the Config. menu by following the instructions in the section Accessing Menus and Modes. Below are
explanations for each of the items in this menu.
Figure 4
Configuration menu
11PC-805 Parts Counter Service Manual
Page 12
Bold selections are the factory
defaults.
UnitSUnits
Choices: pounds, grams, kilograms, ounces
Enable the unit or units of measure you want to have available
when pressing the UNITS key. Default is all units are enabled.
Choices: bul (bulk) and dri (dribble)
Choose the type of sampling you want to use. Pick bulk sampling if you want to place all the sample parts on the scale at the
same time. Pick dribble sampling if you will be counting (dribbling) parts onto the scale.
PIE-rndPiece weight rounding
Choices: Off, 1%, 2%, 5%
Choose the percent of piece weight rounding you want.
SerialSerial
Use this submenu to configure the serial interface.
dEVICEDevice
Choices: none, broadcast, imp printer, Orion, computer
Use this to choose the device to be interfaced with
your scale. If you select imp, the output format will
be selected by the format menu. If you select computer, the output is determined by the commands
received from the computer. Select broadcast to
continuously output the format selected in the format
menu. If you pick the Orion printer, the format shown
in the Print Formats section is sent.
bAUdBaud
Choices: 1200, 2400, 4800, 9600, and 19,200
Choose the baud rate for your serial communication.
dAtAbitDatabit
Choices: 7 or 8
Choose the data bits to be used in serial communication.
PAritYParity
Choices: none, even, odd
Choose the parity to be used in serial communication.
12PC-805 Parts Counter Service Manual
AdvAnCE Advance
Choices: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
If you are using an imp printer, use this to choose the
number of advances to be inserted after the format-
Page 13
ForNatFormat
AutoAutoprint
donEDone
IdLEIdle
Choices: off, 5, 10, 15, 20, 25, 30, 60 minutes
Choose the amount of idle time the scale will remain powered
when operating under battery power. Choose off if you do not
want the scale to automatically shut off. The scale will not do the
power zero test if Off is chosen. Maximum battery life with
continuous backlight usage is approximately 12 hours on a full
charge. Without backlight enabled, battery life is approximately
24 hours and takes about eight hours to recharge.
ted transmission.
Choices: 0, 1, 2, 3, 4, 5, 6, 7
If you are using an imp printer or Broadcast, choose
from 8 preformatted outputs. These are described in
the Serial Communications section of this manual.
Choices: No and Yes
If you are using an imp printer, choose no to disable
autoprint and yes to enable autoprint. If enabled the
weight will automatically be printed after each weight
is added and stabilizes. Autoprint will re-arm after the
weight has returned to within 10 divisions of net zero.
Press the ZERO key to return to the Serial display.
LatchSample Latching
Choices: 1, 2, OFF
Latching, if enabled, gives the appearance of stability immediately following the sample process. The sample latch is broken
when motion is detected or if the calculated count is over two
pieces away from the sample size. The latch will not function
again until another sample process is completed.
Backlight Backlight
Choose to turn backlight on or off. On is the default setting.
donEDone
Press the ZERO key to return to the ConFig display.
13PC-805 Parts Counter Service Manual
Page 14
Error Messages
The error messages you might see on the display are shown below.
EPr ErrEEPROM error - press the TARE key to acknowledge the error
CAL ErrCalibration error - perform calibration procedure to correct
Lo BatLow battery voltage - this annunciator will appear when battery
Serial Communications
voltage reaches 11.5 volts. The scale will shut off at 10 volts.
Cable Pinouts
A straight through cable (1 to 1,
2 to 2, etc.) can be used from a
9-pin computer serial port to
connect this scale.
Pinout assignments for the serial communication are shown below.
9-pin Female
Scale
PinNameDirection
2TXDOUT
3RXDIN
5SG -
14PC-805 Parts Counter Service Manual
Page 15
Preset Print Formats
If the scale is in count mode,
displayed weight formats will
send weight, not count.
There are six preset serial print formats. Choose the one you want to use
during configuration of the scale. The formats are described below.
Abbreviations:
CR = carriage return
LF = line feed
SP = space
U = units character
W = weight character
C = count character
T = tare character
G = gross weight character
P = piece weight character
I = weight type identifier (G for gross, T for tare and N for net)
Imp Printer Format 0
Imp Printer Format 1
Imp Printer Format 2
Imp Printer Format 3
Imp Printer Format 4
Net weight only:
WWWW.WW<CR><LF>
Net weight with units:
WWWW.WW<SP>UU<CR><LF>
GTN with units:
'G'<SP>GGGG.GG<SP>UU<CR><LF>
'T'<SP>TTTT.TT<SP>UU<CR><LF>
'N'<SP>WWWW.WW<SP>UU<CR><LF>
Displayed weight with identifier:
I<SP>WWWW.WW<CR><LF>
In Count Mode: N<SP>CCCC<SP>PCS<CR><LF>
In Weigh Mode: I<SP>WWWW.WW<SP>UU<CR><LF>
15PC-805 Parts Counter Service Manual
Page 16
Imp Printer Format 5
Net weight with units, count and piece weight:
Net= WWWW.WW<SP>UU<CR><LF> (Net = or Gross =)
Count= CCCCCCC<CR><LF>
Piece Wt= .PPPPPP<SP>UU<CR><LF>
Imp Printer Format 6
Imp Printer Format 7
Zebra 2443 / Orion Printer
Fixed Format Label Output
Fixed length (nine digits) displayed weight with units.
sxxxxx.xx uu<CR> (s = positive (a space) or negative (-) weight)
COUNT: CCCC<SP>PCS<CR><LF>
You may also choose to print an Orion printer bar code label. This printer
has one format shown below. It can be chosen through the configuration
menu explained in the Service Manual. The active unit of measure will be
printed. This example shows the weight in LB and the time and date line. If
your printer is not equipped with time and date capability, the time and date
line will not appear on the label.
16PC-805 Parts Counter Service Manual
Time and date line only appear if the printer
has time and date capability.
Page 17
Computer Protocol
COMMANDRESPONSEDESCRIPTION
CA<CR>noneClear Sample
CC<CR>cc_xxxxx<CR>Request piece count
CP<CR>cp_x.xxxxxxuu<CR>Request piece weight value
CM<CR>noneSwitch to count mode
DIxxxxxxxx<CR>noneDisplay Message xxxx
IC<CR>noneReset Scale (warm start)
PWx.xxxxx_uu<CR>noneLoads x.xxxxx as piece weight
TR<CR>tr_ _ _ _x.xxxuu<CR>Request tare value
The scale's RS-232 bidirectional communication works in a master/slave
protocol. A computer or master sends a command code to the scale (slave)
which will return a response to the master device or perform a scale function. Commands to the scale are in uppercase, terminated with a carriage
return. Scale responses begin with the lowercase equivalent of the command code.
(message is 8 characters max)
TZ<CR>noneClear the current tare
Txxxx.x_uu<CR>noneLoads xxxx.x as tare
WD<CR>wd_ _ _xx.xxx<CR>Request net weight
WE<CR>we_ _ _xx.xxxuu<CR>Request net weight with units
W<CR>we_ _ _ _x.xxxuuHML<CR>Request net weight with units
and status
WG<CR>wg_ _ _xx.xxxuu<CR>Request gross weight with
units
WM<CR>noneSwitch to weight mode
WS<CR>ws_HML<CR>Request scale status
WZ<CR>noneZero the scale
Legend:
1) "_" ....... represents the ASCII space character
2) "u" ....... represents the units of measure character(s):
........... "LB" for pounds
........... "KG" for kilograms
........... "G" for grams
3) <CR> .. represents the ASCII carriage return
4) HML .... represents three bytes of scale status information as described
on the next page.
5) Value entered is assumed to be in same units of measure as what the
scale is currently in.
6) Display messages are limited to seven characters.
17PC-805 Parts Counter Service Manual
Page 18
Scale Status Byte H:
BIT:7 6 5 4 3 2 1 0
0011XXXX
Scale Status Byte M:
BIT:7 6 5 4 3 2 1 0
0011XXXX
1: In motion
1: At zero
1: Under capacity
1: Tare active
If it is necessary to service the PC-805, follow this checklist for disassembly
and re-assembly.
✍
❒ 1.Disconnect the scale from the power source and remove the scale
❒ 2.Remove the two socket-head screws securing the top plate to the
WARNING! Be sure to counter
the torque force applied when
loosening or tightening screws
connected to the weight
sensor, or weight sensor
damage may result. Also do
not use a "T" handle allen
wrench and always lay the
palm of your hand on the
aluminum top plate when you
break loose the top screws.
shroud.
SEE WARNING TO THE LEFT.
weight sensor. Lift off the top plate. Do not lose the weight sensor
spacer located between the top plate and the weight sensor.
To access the electronics:
To remove the power
supply/IO board:
Figure 5
Spacer locations
❒ 3.Disconnect the display cable from the scale base.
❒ 4.Remove the four screws holding the electronics cover plate to the
base and lift off the cover.
❒ 5.Remove the weight sensor interface cable from the pins on the
power supply board.
❒ 6.Remove the screws holding the PC board to the base and lift out the
PC board.
19PC-805 Parts Counter Service Manual
Page 20
20PC-805 Parts Counter Service Manual
Page 21
PC-805 COUNTING SCALE
10 lb / 5 kg cap. , 12” x 14” BASE
PARTS AND ASSEMBLY