Weller WA2000 User Manual
Page 3
2005 Cooper Industries, Inc.
2
S805
3/05
TIP TEMPERATURE MEASUREMENT
The unit has the ability to check for either temperature stability (
T) or absolute
temperature. To perform these tests, two methods must be used.
TEMPERATURE STABILITY
This test is used for compliance with the MIL-STD-2000 requirement. The detachable
contact pyrometers were designed for use in this test. The pyrometers will not give
accurate absolute measurements. Due to loading effects, the temperature measured
will be lower than the actual tip temperature (about 30°F or 17°C); however, stability can
easily be checked with the pyrometer. The
T measured has an accuracy of better than
±0.1% over a ten degree span. This is more than adequate to fulfill the temperature
measurement requirements of the MIL-STD-2000 specification.
ABSOLUTE MEASUREMENT
The K-111 and K-181 thermocouple assemblies have been provided for making
absolute temperature measurements. These assemblies can also be used to monitor
active soldering and can measure temperature loading, excursions and heater
response. Although not a requirement for compliance to the MIL-STD-2000
specification, it does provide a good tool for process control and improvement.
MEASUREMENT PROCEDURE
1.
Set the rotary selector switch to the TEMP position and the slide switch to °C or
°F to select the desired unit of measure.
2.
Plug either a contact pyrometer or thermocouple assembly into the TEST
receptacle. If using a pyrometer, place the tinned tip of the iron to be tested onto
the contact pyrometer. Using the iron "holder" provided with the WA2000 will aid
in obtaining an accurate reading. Add additional solder to increase contact area
to each side of the pyrometer. Response time will be 5 seconds or less.
3.
Record both the low and the high temperature reading and calculate
T = (T
H
-
T
L
).
*** PLEASE NOTE ***
The ground adapter is provided for testing tip noise and resistance only. For
temperature measurements, the ground adapter must not be connected to the tester or
temperature errors can occur.