Unitek 6-099-04, Operation And Maintenance Manual

Page: 41 / 88

CHAPTER 3: OPERATING INSTRUCTIONS
MICROPULL
®
IV WIRE BOND PULL TESTER
990-180 3-13
3 The messages that can be received from the MP4 in the Non-Destruct Mode are:
VALID TEST
NO TEST
HIT UPSTOP
WIRE BROKE / HOLD TIME
FALSE ERROR
An "OUT OF LIMITS" message is generated by the software whenever the Pull Value is less than the
contents of the Minimum or greater than the Maximum Non-Destruct Limit fields. A "NO TEST /
OPERATOR" message is generated by the software whenever the operator presses <F7>. The software
replaces the "Valid Test" message with a space and skips any test which contains the "NO TEST"
message.
4 Press the footswitch and proceed with the first test. The data resulting from this test will be displayed
immediately after the footswitch is depressed for the second test.
5 The following is an example of a typical printout. In this example, eight tests were performed and the
"Print All Data" field contains a "Y." The printout indicates that the operator pressed <F7> during the
second test. Therefore the test was printed, but was not included in the test results (“No. of Good
Tests”). During the fifth test the wire broke after the proper pull was applied to the bond. Because the
"Accept Failure Location Codes" field contained a "Y," the operator was able to enter a location
(A12B44) to assist the repair personnel in locating the defective bond.
BOND PULL (gf) LOCATION ERROR
1 2.5 gf
2 .3 gf NO TEST/OPERATOR
2 2.5 gf
3 2.6 gf
4 2.5 gf A12B44 WIRE BROKE /HOLD TIME
5 2.6 gf
6 2.5 gf
7 2.6 gf
8 2.5 gf
Serial Number: 1005
No. of Tests: 8
No. of Good Tests: 7
No. of Bad Tests: 1
6 Just after the last test, the computer sounds two tones as a signal to the operator to press <Fl> to confirm
that this test was the last for the device. Testing will not end until either <Fl>, <F3>, <F4>, or <Fl0> is
pressed. The computer inhibits the MP4 immediately after the last test is made, and a colon is displayed
on the MP4, to the left of the Peak Force Display. As the operator pressed <Fl> after the eighth test, the
summary was printed.