Weller WS 51, Operating Instructions Manual, Page: 22 / 57

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changed by tapping or by firmly pressing the UP or DOWN button (3, 4) in the
desired
direction. Pressing the button will change the setpoint quickly. The digital display (2)
returns automatically to the actual value approximately 2 seconds after releasing the
button.
Maintenance
The transition between the heating element / sensor and the tip of the soldering iron
may not come in contact with dirt, foreign particles or become damaged, since this
affects the precision of the temperature control.
3. Equipotential bonding
The various circuit elements of the 3,5 mm jack bush (5) make 4 variations possible:
Hard-grounded: No plug (delivery form)
Equipotential bonding: With plug, equalizer at center contact (impedance 0 ohms)
Potential free: With plug
Soft-grounded: With plug and soldered resistance.
Grounding with set resistance value.
4. Instructions for use
For initial heating, coat the selective tinnable tip with solder. This removes any
oxidation or dirt on the tip which may have occurred during storage. During pauses
between soldering and before storing the soldering iron, ensure that the tip of the
soldering iron is well coated. Do not use aggressive fluxing agents.
Note: Always ensure the proper position of the soldering iron tip.
These soldering irons have been adjusted for an average-size tip. Deviations can
occur due to exchanging of the tip or using other tip designs.
5. Safety instructions
The manufacturer assumes no liability for uses other than those described in the
operating instructions, or for unauthorized alterations.
These operating instructions and warnings should be read carefully and kept in an
easily visible location in the vicinity of the soldering iron. Non-observance of these
warnings can result in accidents, injury or risks to health.
The WELLER soldering stations WS 81 and WS 51 are in compliance with the EC
Declaration of Conformity in accordance with the basic safety requirements specified
by Directives 89/336/EEC and 73/23/EEC.
6. Accessories
5 29 161 99 Soldering iron set WSP 80 (WS 81 only)
5 33 131 99 Soldering iron set MPR 80 (WS 81 only)
5 33 111 99 Soldering iron set MLR 21
5 33 112 99 Soldering iron set LR 21, antistatic
5 33 113 99 Soldering iron set LR 82 (WS 81 only)
5 33 133 99 Soldering iron set WTA 50
5 13 050 99 Reflow soldering unit EXIN 5
5 27 028 99 Preheating plate WHP 80 (WS 81 only)
5 33 155 99 Soldering iron set WMP (WS 81 only)
5 25 030 99 Thermal insulating unit WST 20
7. Scope of supply
WS 81 WS 51 PU 81 / PU 51
Control unit Control unit Control unit
Soldering iron WSP 80 Soldering iron LR 21 Power cable
Power cable Power cable Operating instructions
Operating instructions Operating instructions Jack
Soldering iron rest Soldering iron rest
Jack Jack
Illustration: Circuit diagram, see Page 52 + 53
Illustration: Exploded view, see Page 54 + 55
PK Elektronik Vertriebs GmbH, E-Mail: info@pkelektronik.com, Internet: www.pkelektronik.com