Pace ST 45 User manual

WORLDWIDE
Operation and Maintenance Manual for the
ST 45 & ST 55 Soldering Systems
P/N 5050-0453
Rev D

©2001 PACE Inc., Laurel, Maryland Page 2 of 20
All Rights Reserved
Title Page
General Information
Introduction ............................................................................................................. 3
Specifications..........................................................................................................3
Parts Identification .................................................................................................. 3
Safety..............................................................................................................................
Safety Guidelines, English Language.....................................................................4
Safety Guidelines, French Language .....................................................................4
Safety Guidelines, German Language.................................................................... 4
Safety Guidelines, Italian Language.......................................................................5
Safety Guidelines, Portuguese Language..............................................................6
Safety Guidelines, Spanish Language....................................................................6
Safety Guidelines, Swedish Language...................................................................7
System Set-Up
Mounting Options....................................................................................................8
Tip & Tool Stand ..................................................................................................... 8
Handpiece Connection............................................................................................ 8
System Power Up..........................................................................................................9
Heater Burn In...............................................................................................................9
Tip Installation ..............................................................................................................10
Definitions.....................................................................................................................10
Quick Start Procedure.................................................................................................. 11
Operation......................................................................................................................11
LED Display, Normal Operation...................................................................................12
LED Display - Temperature Adjust Mode..................................................................... 12
Temperature Setback...................................................................................................13
Auto Off Safety System................................................................................................13
Customizing Your System
Introduction ............................................................................................................ 14
Entering Set-Up Mode ...........................................................................................14
Password ...............................................................................................................14
Temperature Scale ................................................................................................14
Temperature Limits................................................................................................14
Offset Constant......................................................................................................15
Temperature Setback ............................................................................................15
Auto Off..................................................................................................................15
Temperature Display Impedance........................................................................... 16
Exiting Set-Up Mode..............................................................................................16
Factory Settings............................................................................................................16
Corrective Maintenance
System Accuracy and Calibration..........................................................................16
LED Display Message Codes................................................................................16
Power Source.........................................................................................................17
Handpieces............................................................................................................17
PS-90 Heater Replacement...................................................................................18
Packing List/Spare Parts..............................................................................................18
Service..........................................................................................................................19
Limited Warranty .......................................................................................................... 19
Contact Information......................................................................................................20

©2001 PACE Inc., Laurel, Maryland Page 3 of 20
All Rights Reserved
Introduction
Thank you for purchasing the PACE model ST 45 or ST 55 Digital Soldering System. This manual will
provide you with the information necessary to properly set up, operate and maintain the ST 45 or ST 55.
The ST 45 and ST 55 systems are available in either 115 VAC or 230 VAC versions, which incorporates a
highly responsive SensaTemp (closed loop) control system providing up to 80 Watts of total power to a
single output channel. The 230 VAC version system bears the CE Conformity Marking, which assures
the user that it conforms to EMC 89/336/EEC.
The 115 VAC version systems conform to FCC Emission Control Standard, Title 47, Subpart B, Class A.
This standard is designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment.
Specifications
System Power Source Power Requirements
ST 45 or ST 55 Operates on 97-127 VAC, 50/60Hz, 90 Watts maximum at 115 VAC,
60Hz
ST 45E or ST 55E Operates on 197-253 VAC 50/60Hz, 80 Watts maximum at 230 VAC,
50Hz
Temperature Specifications
Handpieces Tip Temperature Range: 204 to 455°C (400 to 850°F) nominal.
Temperature Stability: ±1.1°C (±2°F) at idle from set tip temp.
NOTE: Actual minimum and maximum Operating Tip Temperatures may vary depending on
Handpiece, Tip Selection and application.
EOS/ESD Specifications
The specifications shown below apply except on "Soft Ground Systems" which have a 1meg ohm
current limiting resistance and a label placed on the power source front panel referring to EN
100015-1.
Tip-To-Ground Resistance: Less than 2 ohms.
AC Leakage: Less than 2 Millivolts RMS from 50Hz to 10MHz.
Transient Level: Less than 500mV peak, out to 100MHz.
Parts Identification (ST 45 shown)
Power Receptacle
Power Switch
LED Display
Program Key
Scroll Up Key
Scroll Down Key
AC Power Receptacle/Fuse Holder
Fuse
Earth Ground Receptacle (ST 45E, ST 55 and ST 55E only)

©2001 PACE Inc., Laurel, Maryland Page 4 of 20
All Rights Reserved
English Language Safety Guidelines
The following are safety precautions that personnel must understand and follow when using or servicing
this product.
1. POTENTIAL SHOCK HAZARD - Repair procedures on PACE products should be performed
by Qualified Service Personnel only. Line voltage parts may be exposed when the
equipment is disassembled. Service personnel must avoid contact with these parts when
troubleshooting the product.
2. To prevent personnel injury, adhere to safety guidelines in accordance with OSHA and other
applicable safety standards.
3. SensaTemp handpiece heaters and installed tips are hot when the handpiece is powered on
and for a period of time after power off. DO NOT touch either the heater or the tip. Severe
burns may result.
4. PACE Tip & Tool Stands and handpiece cubbies are designed specifically for use with the
associated handpiece and houses it in a manner that protects the user from accidental burns.
Always store the handpiece in its holder. Be sure to place the handpiece in its holder after
use and allow for cooling before storing.
5. Always use PACE systems in a well ventilated area. A fume extraction system such as those
available from PACE are highly recommended to help protect personnel from solder flux
fumes.
6. Exercise proper precautions when using chemicals (e.g., solder paste). Refer to the Material
Safety Data Sheet (MSDS) supplied with each chemical and adhere to all safety precautions
recommended by the manufacturer.
Directives de Sécurité, Française Langue
Les précautions suivantes, sont celles que le personnel doit comprendre et suivre lorsqu'il utilise, effectue
la maintenance ou se sert d'un produit PACE.
1. Danger potentiel de choc èlectrique - Les procédures de réparation sur les produits PACE
doivent être effectuées seulement par du personnel qualifié. Des parties de l'équipement
désassemblées peuvent être sous tension. Le personnel de maintenance doit éviter tout
contact avec ces parties en réparant le produit.
2. Pour prévenir tout préjudice, le personnel adhère au guide de sécurité en accord avec OSHA
(équivalent à des normes françaises de sécurité) et d'autres standards de sécurité applicable.
3. La mise sous tension des outils SensaTemp comporte des éléments chauffants (buse). Ces
derniers, gardent la chaleur même après la mise hors tension pendant un certain temps. Ne
pas toucher les parties chaudes aux extrémités des outils. Des brûlures sévères peuvent en
résulter.
4. Les outils PACE et leurs pannes ainsi que le support sont dessinés de manière spécifique
afin de protéger l'utilisateur/opérateur de brûlures accidentelles. Reposer toujours les outils
après chaque utilisation dans leurs étuis/supports afin de permettre leur refroidissement.
5. Utiliser toujours les stations Pace dans unlieu bien ventilé. Des extracteurs de fumée Pace
sont hautement recommandés pour protéger votre personnel des vapeurs de soudure/flux.
6. Prenez les mesures nécessaires quand vous utilisez des produits (ex: solder paste) chimiques.
Reportez-vous au document (fiche technique/sécurité) du fabricant fourni avec chaque produit.
Respectez toutes les procédures de sécurité recommandées par le constructeur.

©2001 PACE Inc., Laurel, Maryland Page 5 of 20
All Rights Reserved
Sicherheit Korrekturlinien, Deutsche Sprache
Die nachfolgenden Sicherheitsvorschriften sollten vom Bedien- un Servicepersonal verstanden und
befolgt werden.
1. Entladung spannungsfuehrender Teile - Reparaturen an PACE Produkten sollten nur von
qualifizierten Personal durchgefuehrt werden. Spannungsfuehrende Teile koennen sich bei
gezogenen Netzstecker entladen. Servicepersonal muss den Kontakt dieser Teile vermeiden.
2. Um moegliche Gefahren fuer Personen auszuschliessen, muessen alle
Sicherheitsvorschriften in Uebereinstimmung mit OSHA und anderen anwendbaren
Sicherheitsstandards eingehalten werden.
3. Angeschlossene SensaTemp Heizelemente von Handwerkzeugen und installierte
Loetspitzen sind heiss wenn das System eingeschaltet ist oder erst vor kurzer Zeit
ausgeschaltet wurde. Heizelement und Loetspitze nicht beruehren. Verbrennungsgefahr.
4. PACE Tip & Tool und andere Handwerkzeugablagen sind so konstruiert, dass ein
versehentliches Beruehren des dazugehoerendes Handwerkzeuges vermieden wird.
Bewahren Sie das Handwerkzeug nach Gebrauch stets in der Ablage auf. Bevor das
Handwerkzeug an einem anderen Ort gelagert werden muss, lassen Sie es in der
Werkzeugablage vollstaendig abkuehlen.
5. Benutze PACE Systeme nur in gut beluefteten Raeumen. Ein Loetrauchabsaugsystem, wie
es z.B. von PACE erhaeltlich ist, hilft Bedienpersonen von den Gefahren von Loetrauch zu
schuetzen.
6. Wenn Chemikalien (z.B.: Lotpaste) verwendet werden, muessen alle die in den
Sicherheitsdatenblaettern des Herstellers ausgewiesenen Sicherheitsvorschriften eingehalten
werden.
Misure di Sicurezza, Italiana Lingua
Le seguenti instruzioni sono misure di sicurezza che il personale deve comprendere e seguire quando
utilizza o ripara I prodotti PACE.
1. EVENTUALI RISCHI DI SHOCK ELETTRICO- Si consiglia di far eseguire le operazioni
di riparazione dei prodotti PACE, da un servizio di personale qualificato. Quando la
stazione non é assemblata le parti sottoposte alla tensione di linea potrebbero essere
scoperte. Il personale deve evitare il contatto con queste parti durante manutenzione del
prodotto.
2. Per evitare eventuali pericoli al personale, attenersi alle norme di sicurezza previste dalla
guida, in conformitá all’OSHA e agli altri Standard di Sicurezza applicabili.
3. Le resistenze PACE Sensatemp e le punte installate sono calde quando la stazione é
accesa e per un periodo successivo allo spegnimento. Non toccare la resistenza e la
punta. Puó comportare gravi ustioni.
4. I supporti PACE sono specificamente costruiti insieme alla corrispondente impugnatura e
progettati per un uso che protegge gli utenti da ustioni accidentali. Mettere sempre
l’impugnatura nel propio supporto dopo l’utilizzo e lasciarla raffredare prima di riporla.
5. Utilizzare sempre I stazioni PACE in una zona be aerata per proteggere il personale dai
fumi. É fortemente raccomandato un sistema di aspirazione (dei fumi) come quello
disposta dalla PACE.
6. Usare precauzioni quando si utilizzano sotanze chimiche (es. Pasta di stagno). Fare
riferimento al Material Safety Data Sheet (MSDS) fornita con ogni sostanza chimica e seguire
tutte le misure di sicurezza raccomandate dal fabbricante.

©2001 PACE Inc., Laurel, Maryland Page 6 of 20
All Rights Reserved
Guidelines de Segurança, Portuguese Lingua
Segeum-se precauções de segurança que os operadores devem compreender e seguir ao utilizar ou
reparar produtos PACE.
1. Perigo de choque eléctrico - Os procedimentos de reparação em produtos PACE, devem ser
apenas efectuados por pessoal qualificado. Linhas de alimentação podem ficar expostas ao
desmontar o equipamento. Pessoal de reparação deve evitar o contacto com essas partes ao
reparar o produto.
2. Para evitar danos pessoais, siga as normas de segurança OSHA ou outras normas aplicáveis.
3. Resistencias de aquecimento dos ferros e as pontas instaladas estão quentesquando o ferro
está alimentado, e mesmo durante algum tempo após ser desligado. NUNCA TOCAR nem na
resistencia de aquecimento nem na ponta. Pode resultar em queimaduras severas.
4. Os suportes para pontas e ferros da PACE, foram concebidos para uso especifico, e para
proteger o operador de queimaduras acidentais. Coloque sempre os ferros nos respectivos
suportes. Tenha a certeza de colocar sempre o ferro no respectivo suporte após cada utilização
e deixe-o arrefecer antes de o guardar.
5. Utilize sempre os sistemas da PACE em locais bem ventilados. Um Sistema de extracção de
fumos, como os Sistemas disponiveis na PACE, são altamente recomendados para a protecção
dos utilizadores contra os fumos produzidos pela solda e fluxo.
6. Tenha precauções apropriadas ao utilizar produtos quimicos (ex. pasta de soldar). Lêr sempre
atentamente os normas de segurança fornecidas com cada produto químico e siga sempre todas
as precauções de segurança recomendadas pelo fabricante.
Guias de Consulta de Seguridad, Espãnol Lenguaje
Lo siguiente es precauciones de seguridad que el personal debe entender y debe seguir al usar o reparar
productos de PACE.
1. RIESGO de SHOCK POTENCIAL - Los procedimientos de la Reparación en productos de
PACE sólo deben ser realizados por Personal de Servicio Calificado. Pueden exponerse
partes de voltaje de línea cuando el equipo se desmonta. El personal de servicio debe evitar
contacto con estas partes al arreglar el producto.
2. Para prevenir lesión del personal, adhiera a las reglas de seguridad de acuerdo con OSHA y
otras normas de seguridad aplicables.
3. Las herramientas SensaTemp tienen sus calentadores y las puntas instaladas calientes
cuando la herramienta esta encendida y por un periodo de tiempo después de apagar el
equipo. No toque el calentador o la punta. Las quemaduras severas pueden resultar.
4. El Soporte de punta y Herramienta PACE se diseñan específicamente para el uso con las
herramientas asociadas y las almacena de una manera que protege al usuario de las
quemaduras accidentales. Siempre guarde la herramienta en su soporte. Esté seguro de
poner la herramienta en su soporte después del uso y permita que la herramienta enfríe
antes de guardar.
5. Siempre use sistemas de PACE en una área bien ventilada. Un sistema de extraccíon de
humo como esos disponibles de PACE se recomiendan para ayudar a protejer al personal
contra los humos de flujo de soldadura.
6. Ejercicie las precauciones apropiadas al usar químicos (ej., pasta de la soldadura). Refiérase a
la Hoja de Datos de Seguridad de Material (MSDS) proporcionadó con cada químico y adhiere a
todas las precauciones de seguridad recomendadas por el fabricante.

©2001 PACE Inc., Laurel, Maryland Page 7 of 20
All Rights Reserved
Säkerhetsföreskrifter, Svenska
Följande säkerhetsföreskrifter måste förstås och följas av personal som använder eller utför service på
PACE produkter.
1. RISK FÖR STRÖMSTÖT - Service / Reparation av PACE produkter får endast utföras av
aktoriserad service personal. Strömförande delar kan kommas åt när produkten är
isärplockad. Iaktag aksamhet när felsökning görs för att undvika strömstötar.
2. För att undvika personskada rekommenderas att OSHA eller andra liknande arbetssäkerhets
standarder följs.
3. SensaTemp verktygselement och installerade spetsar är heta när strömmen är påslagen och
en tid efter att strömmen slagits av. RÖR EJ element eller spets. Risk för brännskador!
4. PACE Spets och Verktygshållare är speciellt utformade för att passa PACE respektive
verktyg så att risken för brännskador kan undvikas. När verktyget ej används bör det alltid
förvaras i sin hållare.
5. Tillse att ventilationen är god där PACE System används. Ett lödröksutsug system som t.ex.
PACE tillhandahåller rekommenderas för att skydda användaren för giftig lödrök.
6. Tillse att gällande säkerhetsföreskrifter följs vid användning av kemikalier, t.ex. lodpasta.Se
säkerhetsdatabladen som medföljer kemikalierna och följ de rekommenderade
säkerhetsföreskrifterna från respektive tillverkare.

©2001 PACE Inc., Laurel, Maryland Page 8 of 20
All Rights Reserved
System Set-Up
Set up the ST 45 or ST 55 system using the following steps and associated drawings.
1. Store the shipping container in a convenient location.
Reuse of these containers will prevent damage if you store or
ship your system.
2. Place the Power Switch in the “OFF” or “0” position.
Mounting Options
The ST 45 and ST 55 can be placed directly on a workbench and can be stacked if more than one
system is used. The ST 55 can also be mounted under a workbench or shelf to conserve space. To
mount the system in this way:
1. Mount the bracket in the desired location (fasteners not
supplied).
2. Insert the 2 Mounting Screws (head first) into the power
source mounting slots.
3. Place the washers over the screws.
4. Fit the power source between the bracket’s support arms
and place the screws into the slots on the support arms.
5. Place the nut on the screw and tighten by hand.
6. Angle the power source so the operator can see the
display easily and tighten the nuts with a wrench or
pliers.
Tip & Tool Stand
The Tip & Tool Stand can be mounted to the power source. If the system will be placed on the
workbench, this is recommended. If the ST 55 is to be mounted under the workbench or shelf, the
Tip & Tool Stand should not be mounted to the power source.
1. To attach the stand to the power source:
a) Insert the 2 Mounting Screws (head first) into
the power source mounting slots (plastic case
shown). Slide the screws toward rear of the
power source.
b) Place the Tip & Tool Stand beside the power
source. Insert ends of the 2 Mounting Screws
into the 2 Tip & Tool Stand mounting holes as
shown.
c) Install a Thumb Nut onto the end of each
Mounting Screw and tighten Thumb Nuts.
2. Place the handpiece into its Tip & Tool Stand.
Handpiece Connection
Connect the handpiece connector plug into the Power
Receptacle in the following manner.
1. Align guide on connector with slot on power receptacle.
2. Insert connector into power receptacle.
3. Turn the connector housing clockwise to lock in place.

©2001 PACE Inc., Laurel, Maryland Page 9 of 20
All Rights Reserved
System Power Up
1. Insert the female end of the power cord into the AC Power Receptacle on the rear panel of
the power source.
2. Plug the prong end (male end) of the power cord into an appropriate 3 wire grounded AC
supply receptacle.
CAUTION: To insure operator and ESD/EOS safety, the AC power supply receptacle must be
checked for proper grounding before initial operation.
NOTE: Ensure that the system is placed in a well-ventilated area. Smoke will be generated
during the burn in cycle and while soldering. Fume extraction equipment is recommended
Burn In Procedure
Use the following instructions to perform the Heater Burn In procedure.
1. Place the Power Switch in the “OFF” (0) position.
2. Ensure that the handpiece is connected to the power source. If a plastic cap is present on
the heater assembly, remove it and discard. The cap is used for shipping purposes only.
3. Press and hold the Program ( ) and Scroll Up (
 ) keys together.
4. Place Power Switch in “ON” (I) position.
5. The display will read “brn” when the Program ( ) and Scroll Up (
 ) keys
are released.
6. Press the (
 ) Key to initiate the Burn In Mode. The handpiece heater will
begin to heat. The temperature of the heater will stabilize at 315°C (600 °F)
for 10 minutes.
7. At the conclusion of the 10-minute period, the heater temperature will
increase to 427°C (800°F) for 15 minutes.
8. At the conclusion of the 15-minute time period, the heater is turned off and
the Display will read “End”. Press and release the Scroll Up Key (
 ) to exit
Heater Burn In and return the to normal operation.
CAUTION: The heater will be hot at the conclusion of the Burn In procedure.
The microprocessor circuitry within the unit monitors the system and if any abnormalities are
encountered, the Burn In cycle will be interrupted and an error message displayed. Should
this occur, turn the system off and perform the procedure again. If the cycle is interrupted a
second time, refer to the Corrective Maintenance section of this manual.
This procedure should be performed whenever a new handpiece or heater is connected to
the system.
PS-70/PS-90 Tip Installation
For maximum productivity and proper fit, install tips into your soldering iron when
the heater is hot. CAUTION: To avoid burns or potential injury, always hold the
handpiece with the heater pointed at an angle up to prevent injury.
Installing PERMAGROUND Tips
1. PERMAGROUND Tips should be inserted into the heater with the tail
of the tip pointing towards the heater.
2. PERMAGROUND Tips can be used once the tip has been fully
inserted into the heater. The setscrew is not required to hold the
PERMA-
GROUND
Tip
Tip Tail
Heater

©2001 PACE Inc., Laurel, Maryland Page 10 of 20
All Rights Reserved
PERMAGROUND Tip in the heater.
3. If proper Tip orientation is required, the setscrew can be tightened to hold the tip in place.
Also, heat transfer will improve when the setscrew is used.
Installing Non-PERMAGROUND Tips
1. Insert the Tip fully into heater bore using the supplied Tip Tool.
2. Gently tighten the heater Set Screw.
3. Recheck the tip Set Screw periodically to insure that it remains snug.
NOTE: Periodically, clean the heater bore with a properly sized wire brush
(3/16" O.D. to insure optimum heat transfer and proper tip grounding when
non-PERMAGROUND tips are used.
Definitions
Please read and become familiar with the definitions of each of the following terms that are used
repeatedly in the following operational procedures.
Auto-Off: Safety feature that turns power off (10-90 minutes, settable in 10 minute increments)
after the system has entered Temperature Setback.
Normal Operation: Normal operating mode of the system in which the Operating Tip
Temperature is displayed.
Set Tip Temperature: The operator selected idle tip temperature entered into the system
memory.
Set-Up Mode: Mode of operation in which the operator can quickly and easily adjust the system
parameters (e.g., temperature limits, password, setback time).
Temperature Adjust Mode: Mode of operation where the Set Tip Temperature may be
adjusted.
Temperature Display Impedance (TDI) Mode: Stabilizes the tip temperature shown on the LED
Display by ignoring minor temperature fluctuations. Displayed changes in temperature are
delayed (impeded) for two seconds when a load is applied to the tip. Two seconds after the load
is removed, the displayed temperature will begin rising to set temperature. Particularly useful in a
production environment for monitoring of set temperatures, since under most production
circumstances the temperature will not deviate.
Temperature Setback: System feature that will independently set back the Set Tip Temperature
to 177°C (350°F) after a user selected period of handpiece inactivity (10 to 90 minutes, settable in
10 minute increments). This feature is enabled (or disabled) in the Set-Up Mode.
Tip Offset Constant: Specific value for a given handpiece/tip combination upon which the
system automatically calculates the correct Tip Temperature Offset at any entered Set Tip
Temperature. This value is the temperature loss (Tip Temperature Offset) at 371°C (700°F) and
is set in the Set-Up Mode. A value of 0-115°C (0-240°F) may be entered in the Set-Up Mode.
Password: The Password feature of the ST 45 or ST 55 system will prevent unauthorized
alteration of stored system temperature parameters and feature settings (refer to Table I, “Factory
Settings”). If a Password has been installed, the LED Display will display an instruction to enter
the Password (a 5 key sequence of the keys on the system front panel) when a setting change is
attempted.

©2001 PACE Inc., Laurel, Maryland Page 11 of 20
All Rights Reserved
Tip Temperature Compensation: Differences between the temperature settings and true tip
temperatures are negligible when using Thru-Hole, single point soldering tips. With any heating
system however, True Tip Temperatures can differ greatly from temperature settings when using
larger SMT soldering tips. This difference is called Tip Temperature Offset. The ST 45 or ST 55
Auto Tip Temperature Compensation feature lets you set and display true tip temperatures
regardless of size and type of tip or handpiece. PACE recommends the use of the Tip &
Temperature Selection System booklet (PACE P/N 5050-0251) as a guide to accurately set and
maintain a true tip temperature for any size and type of SMT tip. The booklet contains a listing of
PACE tip information including the Tip Offset Constant (for each tip), which must be stored in
system memory to ensure tip temperature accuracy. Refer to the “Set-Up Mode” section of this
manual for instructions on using this feature.
The ST 45 or ST 55 system is very easy to adjust and operate. The following instructions detail
system features and operation of the system. Also included is a "Quick Start" procedure. Information
regarding changing of system options (e.g., Temperature Setback time, Auto Off) is contained in the
"Customizing Your System" portion of this manual.
Quick Start Procedure
As received from the factory, the system can be quickly set up for use in standard soldering
operations. Simply perform the following Quick Start Procedure to begin using the system. The
systems can be stacked on each other for convenience and to preserve bench top space.
1. Ensure that the Set-Up procedure has been performed; including the Heater Burn In
procedure. Check for the following:
a) Handpiece connection to the power source.
b) Proper tip installed in handpiece.
c) Power cord connection between an appropriate AC supply receptacle and the
power source.
2. Turn the Power Switch “On” (“I”).
3. Press the Scroll Up (
 ) Key to enter the Temperature Adjust Mode.
4. Press the Scroll Up (
 ) Key to increase the desired Tip Temperature.
Press the Scroll Down (
 ) Key to decrease the desired Tip Temperature.
5. Press the Program Key ( ). The system will now return to normal
operation.
6. Observe the Digital Readout as the temperature reaches and stabilizes at the Set Tip
Temperature
NOTE: Read the “Operation” and "Customizing Your System" sections of this manual to utilize
the full capabilities of the system. This is especially important when using large soldering tips or
other SensaTemp handpieces.
IMPORTANT: PACE recommends that you not read the “Customizing Your System” section
until after you feel comfortable with system operation. Please read the following “Operation"
section thoroughly before changing the system settings.
Operation
1. Ensure that the Set-Up procedure has been performed; including the Heater Burn In
procedure. Check for the following:
a) Handpiece connection to the power source.
b) Proper tip installed in handpiece.
c) Power cord connection between an appropriate AC supply and the power source.
2. Turn the Power Switch On ("I").

©2001 PACE Inc., Laurel, Maryland Page 12 of 20
All Rights Reserved
3. Press the Scroll Up (  ) Key. The Set Temperature is now displayed, immediately perform
step 4. If a Password has been previously programmed into the system, "EP0" will be appear
on the LED Display at this point. When this message appears, the operator must enter the
correct Password before adjusting the temperature.
4. Adjust the temperature by pressing and holding Scroll Up (
 ) Key or Scroll Down (  ) key.
Observe the display as the Set Temperature increases first in increments of 1° and then in
increments of 10°. When the desired temperature is reached, release the key. NOTE: The
Set Temperature can only be within the set temperature limits. If the lower limit is reached,
the display will read off. If the upper limit has been reached, the display will read “HiL”.
Temperature limits can be adjusted in the Set-Up Mode
5. Press the Program Key ( ) and the system will return to normal operation.
6. Observe the Digital Readout as the temperature reaches and stabilizes at the Set Tip
Temperature
7. Manually force the system into Temperature Setback by pressing and holding the Scroll
Down (
 ) Key and the Scroll Up (  ) Key.
8. When the display begins to blink, the system is in Temperature Setback mode and will
reduce the set temperature to 177°C (350°F). NOTE: If Auto Off has been enabled in the
Set-Up Mode, the system will enter Auto Off (temperature Off and LED Display flashing "Off")
after the preset time of handpiece inactivity. Auto Off can be exited by pressing any key.
9. To exit Temperature Setback mode, perform any one of the following:
a) Press and release a Key (any of the 3 keys). This is the preferred method.
b) Wipe the hot handpiece tip on a wet sponge to lower the tip temperature.
c) Turn the Power Switch Off ("0") and then back on ("I").
10. The system is now in normal operation. Observe the LED Display as the tip temperature
reaches and stabilizes at the Set Temperature. Allow time for the temperature to stabilize at
the Set Temperature before using.
NOTE: Read the “Customize Your System” sections of this manual to utilize the full capabilities of
the system.
LED Display, Normal Operation
The LED Display provides a 3-digit display of temperature information. The LED Display will show:
1. A display of "888" on initial power up to ensure that all LEDs on the display are
working.
2. A display of the software version of the installed microprocessor (e.g., "1-2") for 2
seconds on initial power up after the "888" is displayed.
3. Actual tip temperature of the connected handpiece during normal operation.
4 The tip temperature displayed will flash when the system is in Temperature
Setback.
5. The displayed temperature will decrease and stabilize at 177°C (350°F) when the system is
in Temperature Setback.
6. "OFF" when the Set Tip Temperature has been set to Off (below minimum set tip
temperature). Refer to the "Set-Up Mode" portion of this manual.
7. "OFF" plus the LED Display will be flashing when the unit has entered Auto Off.
Refer to the "Set-Up Mode" portion of this manual.
8 Error messages ("OSE", "SSE" or "OCE") if a system fault is detected. Refer to the
"Corrective Maintenance" portion of this manual.
LED Display, Temperature Adjust Mode
The LED Display will show the following when adjusting the desired Set Tip Temperature.
1. The Set Tip Temperature.

©2001 PACE Inc., Laurel, Maryland Page 13 of 20
All Rights Reserved
2. "HiL" (High Temperature Limit) when adjusting the set tip temperature and
the maximum allowable temperature is exceeded. Refer to the "Set-Up
Mode" portion of this manual.
3. "OFF" (Low Temperature Limit) when adjusting the set tip temperature and
the minimum allowable temperature is exceeded. Refer to the "Set-Up
Mode" portion of this manual.
3. "EP0" will be displayed if a Set Tip Temperature adjustment is attempted and a Password
has been stored in system memory. As the Password is entered, the zero will increase by
one as each key entry is made. Upon entry of the fifth password key, the display will
change to the Set Tip Temperature if the entered Password matches the stored Password.
5. "no" will be displayed if the entered password does not match the stored Password.
Temperature Setback Mode
To preserve tip life and save energy, the ST 45 or ST 55 system can be programmed to automatically set
back its Tip Temperature to 177°C (350°F) after a selected period of handpiece inactivity (adjustable 10-
90 minutes in Set-Up Mode). As received from the factory, this feature is enabled. Refer to the “Set-Up
Mode” section of this manual to disable or adjust the time-out period of this feature. The operator can
also force the system into Temperature Setback.
Activating Temperature Setback: There are two ways to activate the Temperature Setback feature.
1. AUTOMATIC ACTIVATION: The system can be programmed so that this feature will
automatically activate after a preselected period (10-90 minutes) of handpiece inactivity.
See the “Customizing your System” section for details on programming this feature.
2. MANUAL ACTIVATION: The operator can manually force the system to place the
system in Temperature Setback by performing the following procedure.
a) Press and hold the Scroll Down (
 ) Key.
b) Press the Scroll Up (
 ) Key.
c) Release both keys.
Exiting Temperature Setback: Listed below are 3 ways to exit Temperature Setback.
1. Press and release either Scroll Key (  or  ). This is the preferred method.
2. Wipe the hot handpiece tip on a wet sponge to lower the tip temperature.
3. Method “1” is preferred but you can turn the Power Switch “OFF” (0) and then back
“ON” (1).
Set Tip Temperature and Tip Offset Constant values will be simultaneously restored. For optimum
performance, do not attempt to use the attached handpiece until the Set Tip Temperature is
achieved.
Auto Off Safety System Mode
When enabled, the Auto Off safety system of the ST 45 or ST 55 system turns off the power to the
handpiece 10-90 minutes after entering Temperature Setback. When the system has entered
Temperature Setback, an Auto Off timer within the system circuitry will start running (if Auto Off is turned
on in Set-Up Mode):
1. If any key is pressed during the selected time out period, the Auto Off timer is reset. The
system will return to normal operation.
2. At the end of the time out period, the system will enter Auto Off. Power is turned off to
the heater and the LED Display will show a flashing “OFF ”.
Exiting Auto Off: Auto Off can be exited; returning to normal operation by:
1. Pressing and releasing a Key (either of the 3 keys), or
2. By turning the Power Switch OFF (“0”) and then back ON (“1”).

©2001 PACE Inc., Laurel, Maryland Page 14 of 20
All Rights Reserved
Customizing Your System
The menu driven LED Display of the ST 45 or ST 55 system allows you to easily customize your system.
In Set-Up Mode, you can:
• Enter, remove or change a Password.
• Set the Default Temperature scale to °F or °C as desired.
• Change the Upper and Lower Temperature limits.
• Enter a Temperature Offset Constant (Auto Tip Temperature Compensation).
• Enable or disable the Temperature Setback feature and adjust the time-out period (if
enabled).
• Enable or disable the Auto Off feature and adjust the time-out period (if enabled).
• Enable or disable the Temperature Display Impedance (TDI) mode.
The following instructions should be performed to familiarize the operator with the system.
Entering Set-Up Mode
1. Place Power Switch in the “OFF” (“0”) position.
2. Press and hold the Program Key ( ) while turning on the Power
Switch (“I” position).
Password
3. The LED Display will display the version of the microprocessor and change to read “P--”
or "EP0".
4. If the display reads "EP0", a Password has been stored in system memory. Enter the 5
key sequence Password (the 5 key sequence is made up from the up, down, and
program keys). If the Password entered is incorrect, "no" appears on the display and the
system then returns to normal operation. If this occurs, repeat steps 1 through 5 and
enter the correct Password.
5. The LED Display reads "P--". Choose one of the following options:
a) Press the Program Key ( ) to keep the currently stored Password (including
no Password).
a) Press and release the Scroll Up (s) Key to enter a new Password.
b) Press and release the Scroll Down (t) Key if you wish to remove a stored
password or do not wish to store a Password.
6. If the LED Display now reads "EP0", select and enter a 5 key password sequence. Make
a note of the entered Password. As the Password is entered, the last digit of the display
will count up with each key entry. After the fifth key entry, proceed to step 8.
Temperature Scale
8. The LED Display now shows the stored default Temperature Scale (°C
or °F temperature shown on LED Display). Choose one of the following:
a) Press the Program Key ( ) to keep the stored default
Temperature Scale.
b) Press and release the Scroll Up (
 ) Key to change the default Temperature
Scale. Press and release the Program Key.
Temperature Limit
9. The LED Display now shows the stored default High ("Hi") Temperature Limit with the
display alternating to show "Hi" and the stored limit. Choose one of the following:
a) Press and release the Program Key ( ) to keep the stored High Temperature
Limit.
b) Press and release the Scroll Up (
 ) Key to increase the stored High
Temperature Limit (up to 454°C, 850°F). Press and release the Program Key to
proceed to the next step.

©2001 PACE Inc., Laurel, Maryland Page 15 of 20
All Rights Reserved
c) Press and release the Scroll Down (  ) Key to decrease the stored High
Temperature Limit. Press and release the Program Key to proceed to the next
step.
10. The LED Display now shows the stored default Low ("Lo") Temperature Limit with the
display alternating to show "Lo" and the stored limit. Choose one of the following:
a) Press and release the Program Key ( ) to keep the stored Low Temperature
Limit (204°C, 400°F).
b) Press and release the Scroll Up (
 ) Key to increase the stored Low Temperature
Limit. Press and release the Program Key to proceed to the next step.
c) Press and release the Scroll Down (
 ) Key to decrease the stored Low
Temperature Limit. Press and release the Program Key to proceed to the next
step.
Offset Constant
11. The LED Display now shows the stored Offset Constant with the display alternating to
show "OF" and the stored Offset Constant. Choose one of the following:
a) Press and release the Program Key ( ) to keep the currently stored Offset
Constant.
b) Press and release the Scroll Up (
 ) Key to increase the stored Offset Constant.
An Offset Constant of 0-133°C (0-240°F) can be stored. Press and release the
Program Key to proceed to the next step.
c) Press and release the Scroll Down (
 ) Key to decrease the stored Offset
Constant. Press and release the Program Key to proceed to the next step.
NOTE: If the attached handpiece is disconnected when the system is powered up, any stored
Offset Constant is reset to zero. The Offset Constant must be entered again in the Set-Up Mode.
Temperature Setback
12. The LED Display now shows the stored Temperature Setback time as "S-X" (x=0 thru 9).
Time is shown as tens of minutes (e.g., "S-3" equals 30 minutes). A display of "S- 0"
indicates that Setback is disabled. Choose one of the following:
a) Press and release the Program Key ( ) to keep the currently stored
Temperature Setback time.
b) Press and release the Scroll Up (
 ) Key to enable and/or increase the stored
Temperature Setback time. Press and release the Program Key to proceed to the
next step.
d) Press and release the Scroll Down (
 ) Key to decrease or disable the stored
Temperature Setback time. Press and release the Program Key to proceed to the
next step.
Auto Off
13. The LED Display now shows the stored Auto Off time as "AOx" (x=0 thru 9).
Time is shown as tens of minutes (e.g., "AO3" equals 30 minutes). A
display of "AO0" indicates that Auto Off is disabled. Choose one of the
following:
a) Press and release the Program Key ( ) to keep the currently stored Auto Off
time.
b) Press and release the Scroll Up (
 ) Key to enable and/or increase the Auto Off.
Press and release the Program Key to proceed to the next step.
e) Press and release the Scroll Down (
 ) Key to decrease or disable the stored
Auto Off time. Press and release the Program Key to proceed to the next step.
Temperature Display Impedance

©2001 PACE Inc., Laurel, Maryland Page 16 of 20
All Rights Reserved
14. The LED Display now shows the Temperature Display Impedance mode as Enabled
or Disabled ("AC0" = Disabled and "AC1" = Enabled). Choose one of the following:
a) Press and release the Program Key ( ) to keep the currently stored setting
(Disabled or Enabled).
b) Press and release the Scroll Up (
 ) Key to change the stored setting (Disabled
or Enabled). Press and release the Program Key to proceed to the next step.
Exiting Set-Up Mode
15. The LED Display now reads "End". The Set-Up Mode procedure is now complete.
Choose one of the following steps:
a) Press and release the Scroll Up (
 ) Key to exit Set-Up Mode
and return to normal operation.
b) Press and release the Scroll Down (
 ) Key to return to the start
of the Set-Up Mode procedure. Go back to step 4.
Factory Settings
The ST 45 and ST 55 systems come equipped with a number of features, which may be adjusted as
desired by the user. Listed below are the features and factory settings of each. To change and/or
learn about any of these features, refer to the applicable part of the “Customizing Your System”
section of this manual.
Feature Factory Setting
Password None Entered
°F for 115 VAC SystemsDefault Temperature Scale (°C/°F) °C for 230 VAC Systems
“HI” (Upper) Temperature Limit 454 °C (850 °F)
“LO” (Lower)Temperature Limit 204 °C (400 °F)
Set Temperature “OFF”
Tip Offset Constant “0”
Temperature Setback Enabled, 30 minutes
Auto Off Enabled, 30 minutes
Temperature Display Impedance Mode Enabled
Table 1: Factory Settings
Corrective Maintenance
System Accuracy and Calibration
No calibration adjustments are necessary to maintain the accuracy of the system.
LED Display Message Codes
Listed below are message codes, which, may be shown on the LED Display if a mistake is made by
the operator (e.g., wrong Password entry) or if the system has malfunctioned.
LED Display Message Description
The incorrect password has been entered. The displayed
message will time out after 6 seconds and revert to normal
operation. Enter the correct password.
No handpiece is connected to the power receptacle. Connect
handpiece.

©2001 PACE Inc., Laurel, Maryland Page 17 of 20
All Rights Reserved
The handpiece heater assembly sensor is open. Refer to table 4
to check handpiece.
The handpiece heater assembly sensor is shorted. Refer to
Table 4 to check handpiece.
The handpiece heater assembly may be defective. Refer to
Table 4 to check handpiece.
Power source malfunction. Contact PACE or your authorized
local representative for assistance.
Table 2: LED Display Message Codes
Power Source
Most malfunctions are simple and easy to correct. Refer to Table 3.
Symptom Probable Cause Solution
No power to
system Blown Fuse Check handpiece using table 4. Replace the fuse (located in the AC Receptacle Fuse Holder) with
one of the same rated value (see Table 6, Spare
Parts)
Defective Heater See Table 4.Handpiece will
not heat Power Source
Malfunction Contact PACE
Table 3: Power Source Corrective Maintenance
Handpieces
The following “Heater Assembly Checkout Procedures” (Table 4) is applicable to all PACE
SensaTemp handpieces used with the ST 45 or ST 55 system except for the TT-65 and DTP-80
handpieces. Refer to the applicable manuals for troubleshooting procedures pertinent to these
handpieces.
Perform the procedures with the handpiece heater at room temperature. If the heater is warm,
resistance readings will be different from those shown in Table 4. Disconnect the handpiece from the
power source. Use a meter to check resistance across the handpiece connector plug pins as outlined
in the “Checkout Procedure” column.
System Checkout Procedure Cause Solution
Check resistance: Pin 2 to
Pin 5. Refer to heater
specifications below if
resistance is high, see
Solution
Open Heater Replace Heater AssemblyHandpiece does not heat
Check resistance: Pin 3 to
Pin 6. If circuit reads open,
see Solution
Open Sensor Replace Heater Assembly
Handpiece Overheating Check Resistance: Pin 3 to
Pin 6. Resistance should
be 110 ohms. If resistance
is less than 105 Ohms, see
Solution
Shorted Sensor Replace Heater Assembly
Fuse blows when power
source is turned on Check resistance: Pin 2 to Pin 5. Refer to heater
specifications below if
resistance is low, see
Solution
Shorted Heater Replace Heater Assembly
and Fuse
No Ground on Tip Check resistance: Pin 4 to
a new tip. Resistance
should be less than 2 ohms,
if not see Solution
Oxidation build-up in heater
Bore Clean Heater Bore using wire brush

©2001 PACE Inc., Laurel, Maryland Page 18 of 20
All Rights Reserved
Defective Heater Replace Heater Assembly
Heater Specifications: PS-90 = 8-10 ohms
PS-70 = 11.3-12.3 ohms
Connector Plug Pin-Outs
Table 4: Heater Assembly Diagnostic Procedures
PS-70/PS-90 Heater Replacement
Ensure that the installed heater of the PS-70/PS-90 handpiece is defective by referring to Table 4
(Heater Assembly Checkout Procedures). If replacement becomes necessary, perform the following
procedure to ensure optimum performance and maximize the
life expectancy of the heater.
1. Allow the heater to cool.
2. Remove the Heater Retaining Nut.
3. Pull the Heater Assembly from the Handle. Discard
defective Heater Assembly.
4. Align the connector key on the handle end of the
replacement Heater Assembly with the keyway slot on
the handle.
5. Push the Heater Assembly fully into the handle.
6. Replace the Heater Retaining Nut and tighten by
hand.
Packing List
Quantity Supplied
ST 45 or ST 55
with PS-70 ST 45 or ST 55 with PS-90 ST 45 TT
Item # Description Part Number ST 45
ST 55 ST 45E ST 55E ST 45 ST 55 ST 45E ST 55E ST 45 ST 45E
1 System Power Supply ------ 1 1 1 1 1 1
2 PS-70 Handpiece Kit
(37W) 6993-0236-P1 0 0 1 1 0 0
3 PS-90 Handpiece Kit
(51W) 6993-0199-P1 1 1 0 0 0 0
4 TT-65 Handpiece (74W) 7025-0001 0 0 0 0 1 1
5 Power Cord, 115V 1332-0094 1 0 1 0 1 0
6 Power Cord, 230V 1332-0093 0 1 0 1 0 1
7 TT-65 Tip & Tool Stand ----- 0 0 0 0 1 1
8 ST TT Accessory Kit ----- 0 0 0 0 1 1
9 Tip Tool 1100-0206 1 1 1 1 1 1
10 Operations Manual 5050-0453 1 1 1 1 1 1
11 TT-65 Operation Manual 5050-0336 0 0 0 0 1 1
Table 5: Packing List
Spare Parts
Item # Description PACE Part Number
1 Fuse, 1.0 Amp Time Lag (ST 45 and ST 55) 1159-0246-P5

©2001 PACE Inc., Laurel, Maryland Page 19 of 20
All Rights Reserved
Fuse, 1.0 Amp Time Lag (ST 45E and ST 55E) 1159-0213-P5
2 PS-70 Heater, 21V, 37W 610-0128-P1
3 PS-90 Heater, 21V, 51W 6010-0095-P1
4 Retaining Nut for PS-70/PS-90 1410-0122-P5
5 Tip & Temperature Selection Chart 5050-0251
6 Replacement PCB Assembly 6020-0123-P1
Table 6: Spare Parts
Service
Please contact PACE or your local distributor for service and repair.
Warranty Information:
LIMITED WARRANTY
PACE warrants that this equipment will be free of defects in materials and workmanship for a period of
one (1) year from the date of receipt by original purchaser.
This warranty does not cover repair or replacement required as a result of misuse, mishandling or
improper storage. Failure to perform recommended routine maintenance, alterations or repairs made
other than in accordance with PACE’s directions, or removal or alteration of identification plates in any
way will void this warranty. This warranty is available only to the original purchaser, but the exclusions
and limitations therein apply to all persons and entities.
This warranty does not apply to consumable items, such as tips, filter elements, hoses, collection
chambers etc., except that heaters are normally warranted for a period of six (6) months from the date
of receipt by the original purchaser.
PACE MAKES NO OTHER WARRANTY, EXPRESSED OR IMPLIED, AND MAKES NO WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
PACE will, at its option, repair or replace any defective equipment or parts at its facility or other
location approved by PACE at no charge to the user, or provide parts without charge for installation by
the user in the field at user’s expense and risk. User will be responsible for all costs of shipping
equipment to PACE or other warranty location for warranty service.
EXCEPT FOR THE REMEDY ABOVE DESCRIBED, UNLESS OTHERWISE REQUIRED BY
APPLICABLE LAW, PACE WILL HAVE NO OTHER OBLIGATION WITH REGARD TO ANY BREACH
OF WARRANTY OR OTHER CLAIM WITH RESPECT TO THE EQUIPMENT, OR LIABILITY FOR
ANY DIRECT, INDIRECT, CONSEQUENTIAL, OR INCIDENTAL LOSS OR DAMAGE CAUSED BY
OR OCCURRING IN CONNECTION WITH ANY OF THE EQUIPMENT.
Do NOT return defective equipment or parts to PACE without obtaining prior authorization.
Any warranty or other claim with respect to the equipment must be made in writing and delivered to
PACE (or local authorized PACE Distributor outside the U.S.) within a reasonable time of the expiration
date of this warranty. Sufficient evidence of purchase and date of receipt must also be included,
otherwise user’s rights under this warranty shall be deemed waived.

©2001 PACE Inc., Laurel, Maryland Page 20 of 20
All Rights Reserved
PACE, Incorporated retains the right to make changes to specifications contained herein at any time,
without notice.
The following are registered trademarks and/or service marks of PACE, Incorporated, Laurel,
Maryland, USA and may only be used to identify genuine PACE products or services.
Arm-Evac®, Flo-D-Sodr®, Mini-Wave®, PACE®, SensaTemp®, Snap-Vac®, SODRTEKSM, Sodr-X-
Tractor®, THERMO-DRIVE®, ThermoFlo®, ThermoJet®, ThermoTweeze®, TOOLNET®,VisiFilter®,
PERMAGROUNDTM, Tip-BriteTM, Auto-OffTM
Additional copies of this manual or other PACE literature may be obtained from:
www.paceworldwide.com
PACE USA PACE Europe
9893 Brewers Court Sherbourne House
Laurel, MD 20723 Sherbourne Drive
USA Tilbrook, Milton Keynes
MK7 8HX
United Kingdom
Tel: [phone] (44) 01908-277666
(888)-535-PACE
Fax: [phone] (44) 01908-277777