OHAUS AS142 User manual

Instruction Manual
MODEL AS142
Impact Printer
Ohaus Corporation
29 Hanover Road
Florham Park NJ
07932-0900

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NOTE:NOTE:
NOTE:NOTE:
NOTE: THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPLY
WITH THE LIMITS FOR A CLASS A DIGITAL DEVICE, PURSUANT TO PART
15 OF THE FCC RULES.
THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE PROTECTION
AGAINST HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERAT-
ED IN A COMMERCIAL ENVIRONMENT. THIS EQUIPMENT GENERATES,
USES, AND CAN RADIATE RADIO FREQUENCY ENERGY AND, IF NOT
INSTALLED AND USED IN ACCORDANCE WITH THE INSTRUCTION MANUAL,
MAY CAUSE HARMFUL INTERFERENCE TO RADIO COMMUNICATIONS.
HOWEVER, THERE IS NO GUARANTEE THAT INTERFERENCE WILL NOT
OCCUR IN A PARTICULAR INSTALLATION. IF THIS EQUIPMENT DOES
CAUSE HARMFUL INTERFERENCE TO RADIO OR TELEVISION RECEPTION,
WHICH CAN BE DETERMINED BY TURNING THE EQUIPMENT OFF AND
ON, THE USER IS ENCOURAGED TO TRY TO CORRECT THE INTERFER-
ENCE BY ONE OR MORE OF THE FOLLOWING MEASURES:
-REORIENT OR RELOCATE THE RECEIVING ANTENNA.
-INCREASE THE SEPARATION BETWEEN THE EQUIPMENT AND RECEIVER.
-CONNECT THE EQUIPMENT INTO AN OUTLET ON A CIRCUIT DIFFERENT
FROM THAT TO WHICH THE RECEIVER IS CONNECTED.
-CONSULT THE DEALER OR AN EXPERIENCED RADIO/TV TECHNICIAN
FOR HELP.
Unauthorized changes or modifications to this equipment are not
permitted.

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TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
INTRODUCTION .................................................................................................. 4
DESCRIPTION ..................................................................................................... 4
UNPACKING ........................................................................................................ 5
INSTALLATION .................................................................................................... 5
Environment .................................................................................................. 5
Controls ......................................................................................................... 5
OPERATION
Indicators and Switches Operation ............................................................... 6
Self-Test Mode .......................................................................................... 6
On/Off Mode .............................................................................................. 6
Baud rate Selection ....................................................................................... 7
Parity Selection ............................................................................................ 7
Serial Interface Connection ........................................................................... 8
Ribbon Cassette Loading .............................................................................. 8
Loading Paper ............................................................................................. 11
CARE AND MAINTENANCE.............................................................................. 13
SERVICE INFORMATION ................................................................................. 14
SPECIFICATIONS ............................................................................................. 14
PARTS INFORMATION ..................................................................................... 14
REPLACEMENT PARTS ................................................................................... 15
ACCESSORIES ................................................................................................. 15
LIMITED WARRANTY........................................................................................ 15

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INTRODUCTION
This manual covers installation and operation for the Ohaus Model AS142 lmpact
Printer. Toinsureproperoperationoftheprinter,pleasereadthismanualcompletely.
DESCRIPTIONDESCRIPTION
DESCRIPTIONDESCRIPTION
DESCRIPTION
The Ohaus Model AS142 Impact Printer, is a dot-matrix microprinter which can
interface directly to various Ohaus Balances which contain an RS232 lnterface
connector. TheprintercanbeusedwithOhausBalancesModelsAP,AS,GT,TP,TS,
CT, MB200, I5, I10, I20W, Explorer and Voyager. The printer interface is serial,
RS232 compatible. Internal DIP switches can be set to baud rates from 150 to 9600.
Additional internal switches are used to set parity and handshaking. There are two
LED lamps, Power and SEL indicators, and two push button switches, SEL select on/
off line and LF line feed switch. The printer utilizes an impact dot matrix head in a 5 x
7 format with 42 characters per line, and can print one line per second. Ribbon life is
10,000 lines. Printing paper width is 2.25 “/5.7cm. Power is supplied through an AC
Adapter which is included and provides 9 volts dc, 1 A to the printer.

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UNPACKINGUNPACKING
UNPACKINGUNPACKING
UNPACKING
Your AS142 was shipped with the following items:
•AC power adapter
•Instruction manual
•A paper roll and a ribbon are loaded inside the printer before packing.
Itisrecommendedtosavethecartonandpackingmaterialforstoring,transportingthe
balance or returning it for service.
INSTALLATIONINSTALLATION
INSTALLATIONINSTALLATION
INSTALLATION
EnvironmentEnvironment
EnvironmentEnvironment
Environment
The printer should always be used in an environment which is free from corrosives,
vibration, and temperature or humidity extremes.
ControlsControls
ControlsControls
Controls
The controls, indicators and connectors of the model AS142 impact printer are shown
in the illustration below.
CAUTION:CAUTION:
CAUTION:CAUTION:
CAUTION:

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OPERATIONOPERATION
OPERATIONOPERATION
OPERATION
Indicators and Switches OperationIndicators and Switches Operation
Indicators and Switches OperationIndicators and Switches Operation
Indicators and Switches Operation
Therearetwoindicatorsandtwobuttonswitchesonthepaneloftheprinter.Thepower
indicatorislabeled”P”. TheotheristheSELindicator.Abuttonswitchislabeled”SEL”
for selecting ON/OFF. Another is labeled “LF” for paper line feeding. See illustration
below for controls and indicators.
SELSEL
SELSEL
SEL LFLF
LFLF
LF
Indicators and Switches
TheSELbuttoncan change the SEL indicator’s staus. When the SEL indicatorisON,
the printer is ON.
TheprinterworkingmodecanbechangedwithbuttonSELandLFamongthreemodes
- self-test, on/off and paper feed.
Self-Test ModeSelf-Test Mode
Self-Test ModeSelf-Test Mode
Self-Test Mode
Self-Test checks the condition of the printer. If the printer prints out the Self-Test
sample correctly, the printer is working normally. If Self-Test is wrong, the printer or
power supply needs repairing. Self-Test prints out all characters in the fonts, then
prints the messages about the interface type.
1. To enter the Self-Test mode with the printer OFF, press LF button then press SEL
button. Release both buttons. The printer will enter Self-Test mode.
NOTE: There are two ways to exit the self-test mode as follows:
1.Theprinterwillexitself-testautomaticallyafterfinishingtheself-testsampleprintout.
2. When the self test sample is being printed, it can be terminated by pressing the
SEL button. The printer will exit the self-test mode.
On\Off ModeOn\Off Mode
On\Off ModeOn\Off Mode
On\Off Mode
AfterapplyingpowertotheprinterorbeingintheSelf-Testmode,theprinterentersOn
mode and the SEL indicator lights up. Press the SEL button, SEL indicator light turns
off. PrinterenterstheOffmode. WhentheprinterisinOffmode,itcannotreceivedata.
Press SEL again. Printer re-enters the On mode.
PP
PP
P
SELSEL
SELSEL
SEL

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On\Off Mode (Cont.)On\Off Mode (Cont.)
On\Off Mode (Cont.)On\Off Mode (Cont.)
On\Off Mode (Cont.)
SELhasanotherfunction,tointerrupttheprintout. IfSELispressedandthenreleased
duringaprintout,theprinterwillstopaftercompletingthecurrentline. Atthispoint,you
can load more paper. To complete the printout, press and release SEL button. The
printer will run again at the point the printout was interrupted.
Baud Rate SelectionBaud Rate Selection
Baud Rate SelectionBaud Rate Selection
Baud Rate Selection
The baud rate of serial interface can be selected as 150, 300, 600, 2400, 4800 or
9600bps. It can be set with internal DIP switches as required. To set the baud rate,
take off the removable cover and the upper case of the printer. You can see the DIP
switch in the upper right comer of the printed circuit board. Baud rate can be selected
as shown in the Baud Rate Selection table. The switch near the white mark is Sl. The
factory setting is Sl ON, S2 OFF, S3 OFF. The baud rate is 9600 bps.
Parity SelectionParity Selection
Parity SelectionParity Selection
Parity Selection
Parity Check can be set with S4 - S6 DIP
switches as shown in the Parity Selection
Table. These are set at NO Parity ex-
factory, S4 ON, S5 ON, S6 ON.
PARITY SELECTION TABLE
PARITY
ONON
ONON
ON
8-NON
DIP SWITCH
ONON
ONON
ON
ONON
ONON
ON
ONON
ONON
ON
ONON
ONON
ON
ONON
ONON
ON
8-ODD
8-EVEN
7-NON
7-ODD
7-EVEN
ONON
ONON
ON
ONON
ONON
ON
ONON
ONON
ON
ONON
ONON
ON
ONON
ONON
ON
ONON
ONON
ON
4800
DIP SWITCH
ONON
ONON
ON
150
300
600
1200
2400
9600
BAUD RATE SELECTION TABLE
B.P.S.
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6 1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6

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Serial Interface ConnectionSerial Interface Connection
Serial Interface ConnectionSerial Interface Connection
Serial Interface Connection
The 25 pin connector is located on the back of the printer. The serial interface is
standard RS232C compatible.
The operation procedure of the serial interface is shown as follows:
1. Select baud rate with DIP switches Sl-S3.
2. Select parity with DIP switches S4-S6.
Pin No. Signal
2 R x D
3 T x D
5 DTR
7 GND
8 CTS
PIN SIGNALS OF SERIAL INTERFACE TABLE
Ribbon Cassette - LoadingRibbon Cassette - Loading
Ribbon Cassette - LoadingRibbon Cassette - Loading
Ribbon Cassette - Loading
A ribbon cassette has been put inside of
the printer before packing. When the
printing becomes lighter after long use,
put in a new ribbon as follows:
1. Push forward the removable cover
plate with both thumbs. (Note the
arrow on the cover plate). Then take
off the cover plate carefully. Correct Action

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2. Hold the left end of the ribbon cassefte
with your left hand. Hold right end in right
hand.Rightthumbisontopandforefinger
below. Lift the right end of the cassette
with the end of the cassette with the right
forefinger,thenlifttheleftend. Theribbon
cassette will come off easily.
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
Never lift the left end first. This mayNever lift the left end first. This may
Never lift the left end first. This mayNever lift the left end first. This may
Never lift the left end first. This may
damage ribbon and printer head.damage ribbon and printer head.
damage ribbon and printer head.damage ribbon and printer head.
damage ribbon and printer head.
Ifisdifficulttopushtheleftenddown,raise
itagain. Holdthecassettewithrighthand,
then rotate slightly as indicated. See ar-
row on the cassette cover.
Keep right end of cassette up
Ribbon Cassette Unloading
Turn the gear as indicated by the arrow
3.Take a new ribbon. Hold the cassette as in step 2. Put the left end on the axle of the
gearontheleftendoftheprinterhead. Keeptherightendofthecassetteup asshown
in the illustration.
Incorrect Action - Wrong Direction

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Secure the cassette on the printer head.
The procedure may be repeated several
times until it is easy to push the left end of
the cassette onto the axle of the gear.
Then, press down on the right end of the
cassette with the right thumb as shown in
the illustration.
Sometimes, the cassette is put in cor-
rectly, but part of the ribbon rides up over
the printer head. This may be cause by
two reasons: 1. The paper has been
loaded before the ribbon. Remove paper
andtryagain. 2.Theribbonisausedone.
Re-place with a new cassette.
4. Install the removable cover plate. Place
theplateontheguideslot. Pushintoplace
as gently as shown in the illustration.
Press down the right end with thumb
Cover plate installation