Wahl ST2200, Руководство пользователя

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ST2200 Soldering Iron Tester User Manual
Page 26 of 34
8.0 APPLICATIONS, TECHNICAL INFORMATION AND TROUBLESHOOTING
8.1 Solder Pot and Wave Solder Machines
The ST2200 may also be used to measure solder pot and solder machine
temperature, voltage potential and ground resistance. Use the supplied wire probe
or the Optional Pot Solder Probe model TC801P.
1 . Connect the probe to the Auxiliary input.
2. Switch the Input Selector Switch to the AUX T/C-K position.
3. Use the Function Selector Switch to select Temperature, Millivolts AC only, or
Resistance. Do not use the Millivolts AC + DC function as the thermocouple
wire induces a small DC voltage which gives an erroneous reading.
The Voltage Spike Detector is also operational when testing in the AUX T/C-K
position. This enables detection of transient voltage spikes in solder pots or wave
solder machines.
8.2 Embedded Thermocouple in Soldering Iron Tip
A soldering iron with Type K thermocouple embedded in the tip can be measured
using the AUX T/C-K input. The tip temperature can be measured either from the
AUX T/C-K input or the TIP TEST input.
Tip voltage potential measured from the embedded thermocouple will be accurate
on the AC only function. The AC+DC position will be in error due to
thermocouple effects. Tip Resistance measured from the embedded thermocouple
will be in error due to lead resistance.
8.3 Ground Measurement Technical Info
8.3.1 Soldering Iron Ground Circuit
For soldering of electronic components, 3-wire grounded soldering irons are
recommended. This is to provide a means of protecting electronic components
from damage due to voltage potential at the solder joint for any reason.
The ground path on many soldering irons contains mechanical joints between
replaceable tips, heater and the ground wire. These joints are subject to
loosening, contamination and aging, all of which affect the ground integrity.
Other designs have a direct ground connection to the tip which offers greater
promise of reliability in spite of aging.
Ground integrity is improved by frequent disassembly and cleaning of irons.