Transcell Technology PC 150 User manual

PC150
Digital Bench Scale
Operation Manual
Revision 1.2
September 14, 2000

1996-2000 Transcell Technology, Inc.
Contents subject to change without notice.
Transcell Technology, Inc.
35 Waltz Drive
Wheeling, IL 60090
Tel [phone]
Fax [phone]
E-mail: [email protected]
Web: www.transcell.net

PC-150 Operation Manual 1
ATTENTION:
To extend the life of your digital scale, do not drop items to be weighed onto the
platform or overload the scale beyond its rated capacity. Shock-loading and
overloading may damage the load cell and void the warranty.
Table of Contents
Introduction ............................................................................................................................ 1
Installation and Wiring............................................................................................................ 2
Display Overview ................................................................................................................... 3
Keyboard Functions................................................................................................................ 4
User Menu Mode.................................................................................................................... 5
Setup Menu Mode.................................................................................................................. 6
Calibration.............................................................................................................................. 8
APPENDIX A: Specifications.................................................................................................. 10
APPENDIX B: Troubleshooting the Serial Port ....................................................................... 11
APPENDIX C: Displayed Error Codes..................................................................................... 12
APPENDIX D: Warranty and Service Information................................................................... 13
Introduction
The PC-150 Digital Bench Scale is a com-
pact, 150 lb (70 kg) capacity bench scale
with display and five function keyboard. It
comes standard with a bright LED screen for
easy readout, a removable stainless steel
platform, and an RS-232C serial communi-
cation port.
The scale can be configured to display its
divisions in two separate modes – non-
NTEP mode and NTEP mode. The scale is
shipped from the factory configured in non-
NTEP mode. The NTEP mode is supplied
for scales that need to comply with Hand-
book 44 requirements. To re-configure the
scale, please refer to the “Setup Menu
Mode” section of the manual.
The PC-150 uses full duplex RS-232C serial
format for communication with personal
computers or remote displays. The unit can
transmit data on demand or continuously in
several popular data protocols.
The scale’s serial communication parame-
ters are altered through the User menu The
“User Menu Mode” section of the manual
explains how to use the five front panel keys
to maneuver and save settings in this menu.

2Revision 1.2
Installation and Wiring
The PC-150 back panel comes equipped
with a female DSUB-9 connector for the
RS-232 serial port, a jack for DC power
input, a calibration switch and an
ON/OFF rocker switch. To install the
scale, simply plug the enclosed AC Wall
Adapter into the scale’s DC power jack
first, then into an AC outlet (115 VAC
only). Finally, turn the rocker switch to
the ON (“1”) position. The scale is now
ready for use.
ON/OFF
SWITCH DC POWER JACK RS-232 PORT
ID TAG
CALIBRATION
SWITCH COVER
PC-150 Back Panel
The female 9-Pin RS-232
connector is used to interface
to a PC. Shown at right are
the pin assignments for the
connector.
Pin No. Pin Name
2Receive Data
3Transmit Data
5Signal Ground
235
9-pin RS-232 connector (female)
Shown at right is the suggested cable diagram
for direct connection to a PC. Or, you can or-
der the optional pre-wired NMC-1 Null Modem
Cable TO SCALE TO PC
2RXDRXD 2
TXD 3
S. GND 53TXD 5S. GND
6DSR
4DTR
8CTS
DSUB9 DSUB9
FIGURE 1. Cable Diagram for Scale to IBM PC

PC-150 Operation Manual 3
Display Overview
ZERO
TARE
NET
GROSS lb
STABLE
kg
PC-150 Display Area
ANNUNCIATOR MEANING
ZERO Better known as the “Center of Zero” annunciator, this light is active whenever the
displayed weight is within ± 0.25 divisions of true zero.
NET Indicates that the scale is displaying net weight.
GROSS Indicates that the scale is displaying gross weight.
TARE Indicates that the tare weight in the system was established by means of the push
button method.
lb and kg Indicates the unit of the displayed weight.
STABLE This light indicates that the scale is in equilibrium.

4Revision 1.2
Keyboard Functions
NET
GROSS
ZERO
lb
kg TARE PRINT
PC-150 Keyboard
KEY FUNCTION
ZERO Sets scale to display "0" only when a) in Gross mode, b) not in overload and c) not in
motion.
NET
GROSS Toggles between Gross and Net weight display if a tare has been established.
TARE Used to establish the weight on the platform as the tare weight. You cannot establish
zero or negative gross weight as a tare. Also, the scale must not be in motion or in
overload.
lb
kg
Toggles between lb and kg units if enabled in the User (“A”) Menu.
PRINT Sends "Print" data to serial port if scale is not in motion or in overload.

PC-150 Operation Manual 5
User Menu Mode
The PC-150 scale includes a User menu that contains the scale's serial communication pa-
rameters. It consists of 5 separate menu selections, each also with its own sub-menu of choices.
To change a listed parameter, you must first enter the User Menu mode. Once there, four of the
front panel keys become directional navigators to move around in the menus, and one key is
used to save or SET the selections.
To place the unit in User menu mode:
1. Turn the power off to the unit.
2. While holding down the lb/kg
key, turn the power back on.
3. When the display shows "A1",
the unit is in User Menu mode,
and you can release the lb/kg
key. Shown at right are the di-
rectional and SET key assign-
ments
SET
USER MENU CHART
A1
Baud Rate
1200 2400 4800 9600
A2
Data Bits, Parity
8n 7O 7E
A3
Transmission Mode
Cd
A4
Serial Data Format A5 Enable lb/kg Key
0 1
0 1 2 3 4 5
7n
19200
6
To place the unit back into the Normal Operating mode:
1. Turn off the scale. Turn the scale back on without pressing any keys.
2. The display will go through a digit check, then settle into Normal Operating mode. All front panel
keys will now return to their normal mode of operation.

6Revision 1.2
User Menu Mode / Continued
USER MENU DESCRIPTIONS
NAME/CODE DESCRIPTION CODE/VALUE
A1
Baud Rate Selects the baud rate for data transmission through the serial port. 1200 2400√√
4800 9600
19200
A2
Data Bits and
Parity
Selects the number of data bits and parity of serial transmission.
"8n" = 8 data bits with no parity bit and one stop bit
"7O" = 7 data bits with odd parity bit and one stop bit
"7E" = 7 data bits with even parity bit and one stop bit
"7n" = 7 data bits with no parity bit and two stop bits
8n√√
7O
7E
7n
A3
Mode of Serial
Transmission
Selects when data will be sent out of the serial port to a printer or
computer:"C" = Continuous mode; send data continuously
"d" = Demand mode; send data when a PRINT command is issued
from the printer, computer, or scale.
C
d√√
A4
Serial Data
Format
Selects the data format to be transmitted via the serial port to a
printer or computer.
"0" = Consolidated Controls Format
"1" = Toledo 8213 Format "2" = NCI 3825Format
"3" = Transcell Technology Format
“4” = Detecto ASD Format “5” = Triner Format
"6" = Fairbanks 70-2453-4 Format
0
1
2
3√√
4
5
6
A5
Disable the
lb/kg Key
Allows the lb/kg key to be disabled so that an operator cannot acci-
dentally press the key and change the displayed units.
"0" = Disable the lb/kg key "1" = Enable the lb/kg key
0
1√√
Setup Menu Mode
The PC-150 scale includes a Setup menu that determines the scale’s display mode, allows scale
calibration and also contains the scale's adjustable functional parameters. It consists of 5 sepa-
rate menu selections, each also with its own sub-menu of choices.
To change a listed parameter, you must first enter the Setup Menu mode. Once there, four of the
front panel keys become directional navigators to move around in the menus, and one key is
used to save or SET the selections.

PC-150 Operation Manual 7
Setup Menu Mode / Continued
To place the unit in Setup menu mode:
1. Turn the power off to the unit.
2. Locate the calibration switch on
the scale’s back panel and tog-
gle to the opposite position.
3. While holding down both the
ZERO and PRINT keys, turn the
power back on.
4. When the display shows "F1",
the unit is in Setup Menu mode,
and you can release the two
keys. Shown at right are the di-
rectional and SET key assign-
ments
SET
SETUP MENU CHART
F1
Display Mode F6
Zero Range F9
Calib. Unit.
0 1
F11
Display Check F12 Calibration
Press ZERO
key to begin Press ZERO key to begin
0 1 100% 1.9%
To place the unit back into the Normal Operating mode:
1. With the scale on or off, toggle the Calibration Switch back to its original position. Turn the scale
back on without pressing any keys.
2. The display will go through a digit check, then settle into Normal Operating mode. All front panel
keys will now return to their normal mode of operation.

8Revision 1.2
Setup Menu Mode / Continued
SETUP MENU DESCRIPTIONS
NAME/CODE DESCRIPTION CODE/VALUE
F1
Display Mode Selects display mode for the scale.
"0" = Non-NTEP mode
"1" = NTEP mode
0√√
1
F6
Zero Range Selects the range within which the scale may be zeroed. Note that
the scale must be in standstill to zero the scale. 100%√√
1.9%
F9
Calib. Unit Selects the primary base unit to be used in the calibration process.
Also the default unit for normal operation.
"0" = primary unit is lb. "1" = primary unit is in kg.
0√√
1
F11
Display Check Actuates the function that illuminates all digit segments, decimal
points, and LCD annunciators in a test sequence. Pressing the
ZERO key to scroll down one level begins the test sequence.
Press ZERO key
to begin sequence
F12
Calibration Places scale into the calibration routine. Scrolling down with the ZERO key one level begins the procedure. Press ZERO key to begin sequence
F13
Factory Reset This sub-menu will reset all parameters in the “F” and “A” menus to
the default settings. USE WITH CAUTION!!!!! Press the ZERO
key twice to exe-
cute.
NOTE: Sub-menu F13 restores all parameters in the User (“A”) Menu and Setup (“F”) Menu
to the factory default settings. PLEASE USE CAREFULLY AS YOU MAY LOOSE VITAL
SETUP PARAMETERS!!!
Calibration
ON/OFF
SWITCH DC POWER JACK RS-232 PORT
ID TAG
CALIBRATION
SWITCH COVER
CALIBRATION MODE KEY FUNCTIONS
ZERO GROSS
NET TARE PRINT
SET
lb
kg
The scale can be calibrated by following the procedure below. The minimum test weight that can
be used is 1.5 lb (0.7 kg), but 100 lb (50 kg) is the recommended test weight.

PC-150 Operation Manual 9
Calibration / Continued
To calibrate the scale:
1. If you are already in Setup Menu Mode, scroll to “F 12” and press the ZERO key. Otherwise,
turn the scale off and set the Calibration Switch on the back panel to the opposite position.
Turn the unit back on.
The message "C 0" appears on the display briefly, followed by a value which remains on the
screen. Allow a 20 minute warm-up period for the load cell and electronics to become ther-
mally stable.
2. Press ZERO to zero the value, then press the NET/GROSS key to save the zero point value.
3. The display will momentarily prompt "C 1" for the span calibration, followed by "0.00" with one
digit flashing. Place the test weight on the platform.
4. Use the four directional keys to adjust the displayed value to the actual test weight value in
pounds. Increase the flashing digit by pressing the lb/kg key. Decrease the flashing digit by
pressing the ZERO key. The position of the flashing digit may be changed by pressing the
PRINT key or the TARE key.
5. After setting the exact value, press the NET/GROSS key to save the value.
6. If the calibration was successful, the display will show "ECAL" momentarily, then freeze. Exit
the Calibration mode and enter the Normal Operating Mode by positioning the Calibration
Switch back to its original position.
7. If the calibration was not successful, one of the error messages below will appear. Take the
indicated action to correct the problem, then perform a new calibration.
"Err0" - The calibration test weight or the adjusted keyed-in weight is larger than full scale.
Change the calibration test weight or check the keyed-in weight.
"Err1" - The calibration test weight or the adjusted keyed-in weight is smaller than 1% of full
scale. Change the calibration test weight or check the keyed-in weight.
"Err2" - Check keyed-in weight with the actual weight placed on platform.
To place the unit back into the Normal Operating mode:
1. Toggle the Calibration Switch back to its original position.
2. The display will go through a digit check, then settle into Normal Operating mode. All front
panel keys will now return to their normal mode of operation.

10 Revision 1.2
APPENDIX A: Specifications
MODEL Non Legal-for-trade Capacity Legal-for-trade Capacity
PC-150 0 - 5 x 0.01 lb (0 - 2 x 0.005 kg)
5 - 70 x 0.02 lb (2 - 30 x 0.01 kg)
70 - 150 x 0.05 lb (30 - 70 x 0.02 kg)
0 - 150 x 0.05 lb (0 - 70 x 0.02 kg)
CONSTRUCTION:
Base: Steel and ABS
Platform: ABS
Feet: Non-skid Hard Rubber
DISPLAY:
6 Digit, 0.6", 7-Segment Green LED
OVER CAPACITY ANNUNCIATION:
102% of Full Scale Capacity
OPERATING TEMPERATURE RANGE:
32°F to 104°F
(0°C to 40°C)
PLATTER SIZE:
13” x 13” (330 mm x 330 mm)
POWER SOURCE:
AC Adapter, 12VDC, 500mA,
included
WEIGHT:
Net Weight: 24.3 lb (11 kg)
Shipping Weight: 27.8 lb (12.6 kg)
APPROVALS
Meets H-44 Class III
at 3,500 divisions
COC: 96-136A1
General Class III at
3,500 divisions
NOA: AM-5262
PHYSICAL DIMENSIONS
13.0 in [330.2 mm]
4.4 in [112 mm]
ON/OFF
SWITCH DC POWER JACK RS-232
PORT
ID TAG
CALIBRATION
SWITCH COVER
13.0 in [330.2 mm]

PC-150 Operation Manual 11
APPENDIX B: Troubleshooting the Serial Port
The scale’s serial port operation can be verified by following the procedure below. This proce-
dure makes use of HyperTerminal - a serial port communication program bundled with Windows
95 and Windows 98 operating systems. A HyperTerminal configuration file is available on the
Transcell website.
A comprehensive summary of the various Serial Data Formats (SDF’s) can be found in the PC-
150 Service Manual.
To test the scale’s serial port for proper operation:
1. Connect the NMC-1 Null Modem Cable or equivalent between the scale and your PC. Make
sure to note which communication port (i.e. COM1, COM2) you are using on the PC.
2. On the scale, select the desired setting in the User Menu, including baud rate (A1), Data
Bits and Parity (A2), mode (A3), and serial data format (A4). Note that all Transcell scales
have a fixed parameter of one (1) stop bit.
3. On your PC, run HyperTerminal. Select the proper settings for the following using the
scale’s settings:
Baud Rate
Data Bits
Parity
Stop Bits = 1
4. Enable the CAPS LOCK key on your PC.
5. This test verifies that the scale is transmitting properly. If the scale is set to Demand mode,
pressing the PRINT key on the scale should echo the weight readout on the PC screen. If
the Continuous mode has been selected on the scale, the PC screen will overrun with
weight information.
NOTE: The TOLEDO, NCI, FAIRBANKS and TRINER formats do not support a Continuous
mode.
6. This test verifies that the scale is receiving properly. Use the table below to determine the
valid commands for your serial data format setting. For example the ‘P’ command is exe-
cuted by pressing the capital “P” key on your PC keyboard. Unless otherwise specified, you
do not need to press the ENTER key on your PC.
NOTE1: If the scale is set to Continuous mode, the print commands will be ignored.
NOTE2: If the scale is in motion, the print commands will be ignored for most SDF’s.
FUNCTION FORMAT(S) COMMAND
Print the weight CONSOLIDATED & TRANSCELL ‘P’
TOLEDO ‘W’
NCI & TRINER ‘W’ + <ENTER>
DETECTO ‘~’
FAIRBANKS <ENTER>

12 Revision 1.2
APPENDIX C: Displayed Error Codes
CODE MODE MEANING / POSSIBLE SOLUTION
rrrrrr Normal Operating Mode A weight greater than 102% of the scale’s capacity has
been applied to the scale. Remove the weight from the
platter. Try re-calibrating the scale if this doesn’t solve the
problem. Otherwise, possible load cell damage due to
overloading.
_ _ _ _ _ _ Normal Operating Mode Underrange condition. Platter has been removed. Re-install
platter. Try re-calibrating the scale if this doesn’t solve the
problem. Otherwise, possible load cell damage due to
shock loading.
– HI – Warmup Mode The scale has been turned on with a weight already present
on the platter. Remove the weight and then press the
ZERO key if necessary. Try re-calibrating the scale if this
doesn’t solve the problem. Otherwise, possible load cell
damage due to overloading.
– LO – Warmup Mode The scale has been turned on without the platter installed.
Install the platter and then press the ZERO key if neces-
sary. Try re-calibrating the scale if this doesn’t solve the
problem. Otherwise, possible load cell damage due to
shock loading.
Err 0 Calibration Mode Keyed-in weight value in Calibration Mode is less than 1.5
lb (0.7 kg). Use a larger test weight or re-adjust value.
Err 1 Calibration Mode Keyed-in weight value in Calibration Mode is larger than
150 lb (70 kg). Use a smaller test weight or re-adjust value.
Err 2 Calibration Mode Internal resolution is not high enough to process keyed-in
weight value in Calibration Mode. Verify test weight and
value.
Err 3 All Modes Diagnostics check error - EEPROM Read
Err 4 All Modes Diagnostics check error - EEPROM Write

PC-150 Operation Manual 13
APPENDIX D: Warranty and Service Information
Transcell warrants that the PC-150 Digital Bench Scale will conform to written specifications,
drawings, and other descriptions made by the manufacturer, including any modifications thereof.
Transcell warrants the goods against faulty workmanship and defective materials. If any goods
fail to conform to these warranties, Transcell will, as its sole and exclusive liability hereunder,
repair or replace such goods if they are returned within the following warranty period:
Twelve (12) months from date of shipment from manufacturer.
These warranties are made upon the express condition that:
1) Transcell Technology, Inc. is given prompt written notice upon discovery by Buyer of such
non-conformity, with a detailed explanation of the alleged deficiencies;
2) Such goods are returned to the Transcell at the expense of the Buyer;
3) Examination of such goods by Transcell discloses that the nonconformity actually exists and
was not caused by accident, misuse, neglect, alteration, improper installation improper or un-
authorized repair, or improper testing, and
4) Such goods have not been modified, altered, or changed by any person other than the Tran-
scell or its duly authorized repair agents.
5) Transcell Technology, Inc. will have a reasonable time to repair or replace such goods.
THESE WARRANTIES EXCLUDE ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, ORAL
OR WRITTEN, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. TRANSCELL WILL NOT IN ANY EVENT BE
LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
IN ACCEPTING THIS WARRANTY, THE PURCHASER OR BUYER AGREES TO WAIVE ANY
AND ALL OTHER CLAIMS FOR RIGHT TO WARRANTY FROM TRANSCELL TECHNOLOGY,
INC. SHOULD THE SELLER BE OTHER THAN TRANSCELL TECHNOLOGY, INC., THE
BUYER AGREES TO LOOK ONLY TO THE SELLER FOR WARRANTY CLAIM OR CLAIMS.
No terms, conditions, understanding, or agreements purporting to modify the terms of this war-
ranty shall have any legal effect unless made in writing and signed by a corporate officer of the
Transcell.