Weller WA2000 - Manual (Page 5)

2005 Cooper Industries, Inc. 4 S805
3/05
MEASUREMENT PROCEDURE
1. Set the analyzer rotary selector switch to the OHMS position.
2. Insert the yellow plug from the ground adapter into the analyzer TEST receptacle
and the ground pin into the GND receptacle. Record lead resistance R
L
, which
will be subtracted later.
3. Remove yellow plug from the analyzer TEST receptacle and reinstall pyrometer.
Plug iron to be tested into the ground adapter and the adapter into an AC power
source. Turn on the iron under test and allow to stabilize. Lay the iron's tip onto
the pyrometer to complete the test circuit. Add additional solder to increase
contact area.
4. Record the reading R
T
and subtract lead resistance, R
T
- R
L
. The result will be the
iron's tip to ground resistance.
**IMPORTANT**
When making measurements, always use a clean tinned tip. A dirty oxidized tip can
cause erroneous measurements.
Always add additional solder to the tip and pyrometer, during measurement, to
ensure sufficient electrical contact. Do not add solder to the thermocouple assemblies.
RECORDER OUTPUT
A buffered output and recorder plug assembly has been provided for connection to a
chart recorder. This output can also be connected to a DVM with an IEEE 488 type
output for data acquisition and statistical analysis on a P.C.
Recorder Output Parameters
Temperature: 1mV/degree
(°F or °C)
Resistance: 1mV/0.1 ohms
Tip Noise: 1mV/0.1 mVRMS
HANDS OFF OPERATION
A small stand is provided with the analyzer to enable the user to support the iron
under test when using the contact pyrometer. This helps in providing a stable method of
supporting the iron, which results in consistent measurements.