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Weller’s WCU High-Precision Temperature Measurement Device Provides Fast Measurements with High Levels of Accuracy

By Luca Conte, Sales Manager Weller Southern Europe

Weller WCU mobile high-precision temperature measurement device

A professional control unit that controls soldering and reworking tools must ensure the precision of its working parameters. Some technologies have individual settable temperatures, in step increments of 1° while others work with fixed temperature tips. In both cases, it is crucial that the actual working temperature ensures a safe,repeatable process. The advanced Weller professional soldering technologies use a closedloop temperature regulation to monitor the temperature of the tip via a high-quality Platinum sensor. It automatically adjusts the power to the silver core heating element according to the application, component and solder joint size. As the Weller® heater design continuously maintains the same physical material characteristics during its lifecycle, no calibration is required. The Platinum sensor and the control technology ensure temperature accuracy and stability according to IPC J-STD001 D. For advanced precision, surpassing IPC J-STD-001 D temperature accuracy requirements, all the professional digital units manufactured by the German company in the last 20 years have a built-n OFFSET function, which sets a value to correct any slight deviations (due to the specificity of the tip or to the state/wear or shape of it).

Weller’s WCU (T0053450199) is a compact, stand-alone and high-precision temperature measurement device for quick,accurate temperature measurement. The WCU unit is strategically designed for users that need to make measurements fast and easily while maintaining the highest level of accuracy. It comes with a large, non-backlight display. It is ESD safe, so it can be used in ESD protected areas (EPA). This compactly designed, battery-powered device can easily be shared between different workstations and its auto off function extends battery life. It allows for highprecision measurements within 10, with a counter (to replace sensors, for example).

This new device has a double purpose as the temperature can be measured by the built-in thermo cross or with a standard external type K sensor. Its main function uses the three filaments (one of which is mechanical only) that form the probe: the soldering tip has to touch at their intersection and the real temperature can be measured and shown in the middle of the screen of the WCU. The two contacts that carry out the reading are protected with heat-resistant and antistatic caps to avoid false readings caused by the proximity of the soldering iron’s resistance to the probes. There is a metal plate under them to simplify cleaning, and the probes are easily replaceable (5 in the scope of supply and also available in packs of 10 pcs, T0058771712).

As an alternative (or addition) to the thermo cross, a type K thermocouple can be connected to carry out temperature measurements of any type: from a solder bath or a process, or even to verify “system accuracy” regardless of the specific tip used, but based on a sample tip, and this would use the 0.5 mm probe together with the appropriate Weller measurement tip (sold separately, T0053119099). The temperate read by the external sensor is shown in the top left corner of the display.

Weller WCU can be connected to Weller units from the WX family but also can be used with older or other units, even with other brands, as well as used as an external temperature sensor (not necessarily for tips or nozzles). By connecting it to the Weller WX units (using a cable sold separately, T0058764710), once the temperature verification process has been completed (about 10″), any offset will be automatically set in the built-in memory of the WX connected tool. The WCU is supplied with its calibration certificate and a Weller service center is available for periodic certification.

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