Weller WESD51 User Manual
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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