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MODEL WESD51 ELECTRONIC SOLDERING STATION
DESCRIPTION
The WESD51 Soldering Station is one in a series of products, which have been developed for industrial manufacturing as well as for the rework
and repair sector. Microprocessor control and a digital display allow for simple and easy operation. The digital electronic control system offers
excellent control performance for various soldering jobs.
A digital readout, grounded soldering iron tip, zero power switching and anti-static design of the station and tool allow the WESD51 Soldering
System to meet the high quality standards established by Weller
between Degrees F and Degrees C, and the ability to Lock the tip temperature setting using the PW50 Probe (supplied). The station will
automatically enter a sleep mode and shut off power to the tool and digital display, after 99 minutes of inactivity.
Tip temperature is adjustable in the range of 350°F to 850°F (177°C to 454°C), with the front panel temperature control knob. The Lockout
function will be indicated by a single Decimal Point in the upper left hand corner of the MSD (Most Significant Digit), when the station is
Locked. The station can also be switched between Degrees F and Degrees C. The station is represented in the Degrees C mode,
when the single Decimal Point in the upper left hand corner of the LSD (Least Significant Digit) of the display, is illuminated. An Offset
feature is offered and is indicated by a single Decimal Point in the upper left hand corner of the MD (Middle Digit), of the display. (See
Individual Operating Instructions for details). This soldering station meets all applicable standards for the CE mark.
OPERATING INSTRUCTIONS
Unpack unit carefully. Place spring and funnel in slot in top of tool stand. Position tool stand on appropriate area of workbench. Dampen the
sponge, distilled or de-ionized water is preferred. Insert tool in holder and connect tool plug to receptacle on power unit; rotate plug housing
Clockwise (CW) to lock plug into receptacle. Insert line cord plug into a properly grounded AC receptacle and turn station On. Set
temperature control knob to desired tip temperature. When the tip temperature reaches 400° F (204° C), remove tool from holder and tin tip
with solder. Unit will be ready for use when the set point temperature is reached.
When first turned On, the unit will display 888 for two seconds as a test and then will display the Set temperature for three
seconds before switching into the Read mode. The unit display shows a Read mode by default, which displays the current
temperature of the tip. To switch into the Set mode, turn the temperature control knob slightly and the display will show the current
Set temperature. Release the knob when you have reached the desired temperature setting and after a three second delay, the
display will switch back to the Read mode.
While in the Read mode, the displayed tip temperature may fluctuate. This fluctuation is normal and represents the control systems
response to the changing load. Tip selection, for a particular job, may be optimized by observing the tip temperature fluctuations
during the soldering application. Normally, the tip should be selected for minimum fluctuation. This will assist in providing the
shortest soldering dwell time. However, some applications may require a fast response time with total fluctuation not being critical.
Always use the lowest temperature that will handle the load that you are soldering. The Weller
power to the heated load even when set to the lowest temperature; therefore, there is no need to use high temperatures to handle
heavy soldering loads. By using lower temperatures and properly selecting tip styles, sensitive components will be protected from
heat damage.
WARNING: Do not remove ground prong from line cord plug. Removal may cause tip temperature control to be erratic.
®
. The station features an external tip temperature Offset, selectable
®
electronic control provides maximum
AVAILABLE MODELS AND HAND PIECES
PRODUCT DESCRIPTION
WESD51 Power unit, 120V 60Hz, °F/°C Selectable, PES51 tool and tool stand
WESD51D Power unit, 220V 50/60 Hz, °F/°C Selectable, PES51 tool and tool stand
WESD51DUK Power unit, 230V 50/60 Hz, °F/°C Selectable, PES51 tool and tool stand
WESD51J Power unit, 100V 50/60 Hz, °F/°C Selectable, PES51 tool and tool stand
WESD51T Power unit, 110V 60 Hz, °F/°C Selectable, PES51 tool and tool stand
PES51 50 watt Soldering Tool w/ETA Tip
WARNING: This product, when used for soldering and similar applications, produces chemicals known to the State of California
to cause cancer and birth defects or other reproductive harm.
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SPECIFICATIONS
STATIONS
1. Power Input: 120VAC ±10%, 60 Hz, (230VAC ±10%, 50/60 Hz), 60 watts.
2. Power unit output voltage: Isolated 24VAC @ 2.1 amperes.
3. Size: 4.5" x 5.9" x 3.6".
4. Line Cord: 3-Wire
5. Tip temperature control range: 350°F to 850°F (177°C to 454° C).
6. Control setting resolution: 1° F (1° C).
7. Stability: ±10° F (±6° C) per MIL-STD-2000.
8. Absolute accuracy: Average tip temperature can be Offset to ±9° F (±5° C) at idle with no load.
9. Ambient temperature range: 60° F to 110° F (16° C to 44° C).
IRONS
1. Wattage: 50 watts at 24 VAC.
2. Tip voltage: Less than 2 mv TRMS to line cord ground pin.
3. Tool weight: 2 ounces without cord.
4. Tool material: Static dissipative thermoplastic handle and stainless steel.
5. Heater type: Fiberglass and ceramic insulated heating element. Reverse wound for low leakage and magnetic
field cancellation.
6. Tip type: Weller® ET and SMT series tips. Copper with heavy Iron, Nickel and Chromium plating for long
life.
7. Sensor: Type K Thermocouple. Fits deep inside tip for maximum response.
8. Handle design: Heat insulated with foam sleeve for low grip temperature and maximum comfort.
9. Tool cord: Silicone rubber, burn resistant.
10. Connector: Polarized, 6 pin locking.
11. Recovery time: Less than 10 seconds from 100°F drop with ETA tip at 700°F.
STANDARDS
1. Housing and tool handle made with Electrostatic Protective Materials as required in MIL-B-81705.
2. Housing passes Static Decay Test per Federal Test Method Std. No. 101, Method 4046.
3. Weller® ESD tools comply with DOD-HDBK-263.
4. WES51 & WESD51 units meet MIL-STD-2000, MIL-S-45743, W-S-6536, W-S-570 and DOD-STD-1686.
5. WESD51 units meet all applicable standards for CE mark.
ACTIVATION OF LOCKOUT FEATURE
1. Set the digital display to the desired tip temperature.
2. Momentarily touch the Lockout Pencil (PW50) to the ESD symbol on the front panel. The decimal point on the MSD (Most
Significant Digit) will blink if the Lockout Pencil is held against the touch panel. Remove the Lockout Pencil from the ESD
Symbol and the single decimal point in the MSD (Most Significant Digit) will be illuminated, indicating that the station has
been Locked. The lockout set temperature will be displayed for 3 seconds before switching to the actual tip temperature. Adjusting the temperature set knob will temporarily display the Set point of the station, even though the unit will
not change the temperature setting, when in the Lockout mode.
3. Reverse the lockout by momentarily touching the Lockout Pencil to the ESD symbol. Remove the Lockout Pencil slowly
and the temperature set knob will function as normal. The single decimal point in the MSD (Most Significant Digit) will
now be Off.
Note: If the temperature set knob is adjusted during the Lockout mode, the temperature setting will display the
current Position/Setting of the temperature set pot, when the Lockout function is removed.
TIP TEMPERATURE OFFSET PROCEDURE
1. Monitor the tip temperature using the K111, Type K Thermocoupled Tip temperature test kits. (see Replacement Parts
and Accessories Section)
2. Set the digital display to the desired tip temperature and allow the tip temperature to stabilize (as indicated by the Read
mode).
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3. Apply the Lockout Pencil to the ESD symbol on the front panel. The single decimal point in the MSD (Most Significant
Digit) will slowly blink for approximately 3 seconds. At this point, the single decimal point in the MD (Middle Digit) will
begin to flash, indicating that it is in the Offset mode. Adjust the digital display to where it matches the measured tip
temperature. Now remove the Lockout Pencil and the temperature Offset procedure is complete. The Offset is retained
when the station power is turned off.
Note: The Offset allows for approximately +/- 75° F (42° C) adjustment capability. If the measured error is greater
than +/- 75° F (42° C), the station will reject the input by continuously displaying NO on the digital display,
until the Lockout Probe is removed from the panel. At this point, the Offset procedure (Step 3 above) must
be repeated with an offset used, within the acceptable range.
RESET STATION TO FACTORY DEFAULT SETTINGS
With the station power turned Off, adjust the temperature set knob to the lowest setting: 350°F (177°C). Apply the Lockout Pencil
to the ESD symbol on the front panel and turn the station On. Remove the Lockout Pencil and the procedure is complete. Any tip
temperature Offset programmed into the memory will now be reset to the nominal factory settings. Lockout will also be cleared.
AUTO OFF FEATURE
The Weller® Model WESD51 Model Station will automatically shut off power to the tool and the digital display after 99 minutes of
inactivity of the iron. Certain applications may not be recognized by the Loading Effect or Temperature Drop on the tool and may
require more frequent wiping of the tip on the damp sponge, to recognize use.
°F/°C OPERATION
The WESD51 Station will display temperature in either °F or °C. The factory default is °F. To change the display to °C, turn the
station off and adjust the temperature set knob fully clockwise to the maximum temperature setting. Apply the Lockout Pencil to the
ESD symbol on the front panel and turn the station on. Remove the Lockout Pencil. After a brief display test, the display will read all
temperatures in °C. Repeat the procedure to toggle back to °F.
TROUBLESHOOTING GUIDE
WARNING: AC line voltage is present inside power unit even when power switch is off. Refer service to qualified personnel.
NOTE: Access to internal parts, may be gained by removing the four rubber feet, four screws under feet and top case.
TOOL DOES NOT HEAT
With line cord unplugged and power switch on, check for approximately 21 ohms at line cord blades (55 ohms for 230V unit).
· Check power switch for continuity in the On position - replace if defective.
· Check line cord for continuity - repair or replace if defective.
· Check transformer primary - replace transformer if defective.
With line cord plugged in and power switch on, check for 24VAC ±10% between pins #2 and #6 of tool recep
· Check transformer secondary for 24VAC ±10% - replace transformer if defective.
· Check wiring to printed circuit board assembly - repair or replace if defective.
· Replace printed circuit board assembly.
Check wiring from tool receptacle to printed circuit board.
· Repair or replace if defective.
Replace soldering tool with known good tool and recheck.
· Refer to Tool Troubleshooting Guide
· Replace printed circuit board assembly.
TOOL OVERHEATING
Replace soldering tool with known good tool and recheck.
· Refer to Tool Troubleshooting Guide
Replace printed circuit board assembly in station.
tacle.
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TIP TEMPERATURE TESTING ERRORS
NOTE: Tip temperature testing must be done using the K111, Type K Thermocoupled Tip temperature test kits. (see
Replacement Parts and Accessories Section). Other methods, which include Contact Pyrometers or large loading
devices such as heavier thermocouple wire, will cause errors. Replace soldering tool with known good tool and
recheck tip temperature.
· Refer to Tool Troubleshooting Guide
Adjust station according to Tip Temperature Offset Procedure.
HIGH TIP VOLTAGE
Replace soldering tool with known good tool and recheck tip voltage.
· Refer to Tool Troubleshooting Guide
Check for continuity from pin #5 of tool receptacle to line cord ground pin.
· Check wiring from tool receptacle to line cord ground pin - repair if defective.
MODEL PES51 50 WATT SOLDERING TOOL
PRODUCT DESCRIPTION
The Weller® PES51 Soldering Pencil features a Nichrome wound, stainless steel heater element construction, a non-burning silicone rubber
cord and a large selection of Iron, Nickel and Chrome Plated, Copper tips in various styles, including tips for surface mount devices. The
handle design is lightweight, high impact ESD plastic, with controlled thermal conductivity via a foam sleeve to allow continuous use without
discomfort from heat or fatigue. The heating element is a fast response, long life, Nichrome wound, unit encased in stainless to eliminate
corrosion at high temperature.
The Weller
®
PES51 tools are interchangeable without the need to make adjustments to the station Offset function. This is made possible by
the use of a precision temperature sensor; which is positioned deep inside the tip to insure rapid response to soldering load variations.
The Weller
®
PES51 tool has been specifically designed for use at electrostatic free workstations and is completely free from stored static charges.
The plastic used in this product meets the requirements for Electrostatic Protective Materials. All Weller® ESD tools comply with DOD-HDBK-263.
The Weller
®
PES51 tool is designed to be used with the WES51& WESD51 series power units. The station and tool combination meets DOD-STD-
2000, MIL-S-2000, MIL-S-45743, W-S-570 as well as DOD-STD-1686.
PES51 SERIES SOLDERING TOOL TROUBLESHOOTING GUIDE
CAUTION: Disconnect from power unit before attempting repairs.
NOTE: If ground pin has been removed from power unit line cord, tip temperature control may be erratic.
1. Tool does not heat.
1.1 Check heater resistance from pin 2 to pin 6 (see Figure 1) of the tool connector, should measure 9 - 11 ohms.
1.1.1 Proceed to 1.2 if heater is correct.
1.1.2 Remove heater/sensor assembly from handle and check resistance at heating element wires.
1.1.2.1 Remove tip barrel/nut and tip.
1.1.2.2 Attach 3/8 - 24 nut to heater.
1.1.2.3 Release cord strain relief by pushing cord 1/4" to 1/2" into handle.
1.1.2.4 Clamp 3/8 - 24 nut in vise, pull and wiggle handle side-to-side to disengage heater.
1.1.3 Replace cord/handle assembly if heater is correct; else replace heater/sensor assembly, complete instructions are
provided with replacement part.
1.2 Check sensor resistance from pin 3 to pin 4 of the tool connector, should measure 1 - 2 ohms.
1.2.1 If sensor resistance is incorrect, remove heater/sensor assembly from handle and check at the sensor leads.
1.2.2 Replace cord/handle assembly if sensor is correct; else replace heater/sensor assembly.
1.2.3 Check resistance from pin 3 to pins 2 and 6 of the tool connector, should measure 1 meg ohm minimum.
1.2.4 Remove heater/sensor assembly from handle and check for shorts in wiring inside handle. Repair or replace as
required.
2. Tool overheating. (NOTE: Tool will overheat with tip removed).
2.1 Check resistance from pin 3 to pin 4 of the tool connector, should measure at least 1- 2 ohms.
2.1.1 Remove heater/sensor assembly and check for shorts in wiring inside handle. Repair wiring as required, or replace cord/
handle assembly, complete instructions are provided with replacement part.
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3. High voltage on tip.
3.1 Check resistance from pin 5 of the tool connector to tip, should measure 2 ohms maximum.
3.1.1 If tip ground is open, remove heater/sensor assembly and check continuity of ground wire in cord.
3.1.2 Repair wiring as required, else replace cord/handle assembly if open.
Weller® ET and SMT series tips are solid Copper, plated with Iron, Nickel and Chromium. The Nickel and Chromium protect the
shank from corrosion and solder creep. The tips are pre-tinned in the working area with solder. Use only Weller® soldering tips. Use
of non-Weller® components may void product warranty if the non-Weller® component causes damage to the unit. Consult tool and tip
selection sheet for available tip styles.
1. Keep tip tinned; wipe only before using.
2. Use rosin or activated rosin fluxes. Acid type fluxes will greatly reduce tip life.
3. Remove tip and clean with suitable cleaner for flux used. The frequency of cleaning will depend on the type of work and
usage. Tips in constant use should be removed and cleaned at least once a week. Corrosion between tip and sensor can
cause erratic temperature control. WARNING: If tip does not remove easily, do not force it. The sensor will be damaged.
Try removing the tip while heated. If this does not work, return tool to Weller® for service. When installing new tips, they
should slide freely over sensor probe.
4. Dont try to clean tip with abrasive materials other then the Weller® WPB1 polishing bar and never file tip; to do so will
greatly reduce tip life. Tip wettability is affected by contact with organics; such as plastic resins silicone grease, and other
chemicals. If the tip becomes unwettable, it may be cleaned hot with a soft steel or brass brush using solder flux as a
solvent; or with a Weller® WPB1 polishing bar. Do not over do this or the iron plating will be removed and the tip ruined. Retin tip immediately after cleaning to prevent oxidation.
5. Do not remove excess solder from heated tip before storing. The excess solder will prevent oxidation of the wettable
surface when tip is re-heated.
6. Do not use any compound or anti-seize material on Weller® tips or sensor probe. This may cause wettability problems and
may cause seizing after extended heating periods.
Use the soldering tool only with the specified voltage or specified pressure and pressure range.
REPLACEMENT PARTS AND ACCESSORIES
KEY NO.
1
2
3
4
5
6
7
8
Not Shown
Not Shown
Not Shown
Not Shown
Not Shown
Not Shown
Not Shown
Not Shown
Not Shown
Not Shown
PART NO.
SW110
WES207
TR215
TR216
PES51
BA60
PES201
PES203
PW50
EC254
PH50
SMTA
WA2000
K111
WPB1
SF60
TC205
WESD51PU
Power Switch
Circuit Board Assembly for WESD51
Power Transformer, 120VAC, 60 Hz
Power Transformer, 230VAC, 50/60 Hz
PES51 Soldering Iron Only
Barrel Nut Assembly
Heater/Sensor Assembly
Cord/Handle Assembly
Lockout Pencil
Spring and Funnel Only for PH50 Iron Stand
Tool Stand w/Spring and Funnel for PES51 Tool
Surface Mount Tip Adapter for PES51 Tool
Soldering Tool Analyzer
Temperature Test Kit w/Thermocoupled ETA Tip Type K
®
Polishing Bar
Weller
Tool Funnel for SMT Tips (PES51 Iron)
Replacement Sponge (PES51 Iron)
Power unit only, 120V 60 Hz, °F/°C Selectable, US style 120VAC plug.
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SELECTION OF WELLER
®
SOLDERING TIPS
NUMBER
ETA
ETAA
ETB
ETBB
ETC
ETCC
ETD
ETDD
ETH
ETJ
ETK
ETL
ETM
ETO
ETP
ETR
ETS
ETT
ETU
ETV
DESCRIPTION
Screwdriver
Single Flat
Screwdriver
Single Flat
Screwdriver
Single Flat
Screwdriver
Single Flat
Screwdriver
Long Conical
Long Screwdriver
Long Screwdriver
Long Screwdriver
Long Conical
Conical
Narrow Screwdriver
Long Conical
Long Conical
Single Flat
Single Flat
TIP
1/16
1/16
3/32
3/32
1/8
1/8
3/16
3/16
1/32
1/32
1/8
1/32
3/64
3/64
5/64
1/16
1/64
3/64
1/64
1/32
REACH
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
1
1
1
1
1
5/8
5/8
1
1
5/8
5/8
EXPLODED VIEW WESD51
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EXPLODED VIEW PES51
Figure 1
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