Unitek 6-099-04, Operation And Maintenance Manual

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CHAPTER 1: SYSTEM DESCRIPTION
MICROPULL
®
IV WIRE BOND PULL TESTER
990-180 1-9
The signal and pin numbers for J1, the RS-232C Interface connector, are shown in table 1-6.
Table 1-6. RS-232 Interface Connector, J1, Signals
Pin Description
2 Received data
3 Transmitted data
7 Signal ground
The MP4 can understand the eight-bit binary-coded messages shown in table 1-7.
Table 1-7. Message Codes Understood by MP4
Binary Code Response by MP4
196 Disables the footswitch. Colon will light.
197 Enables the footswitch. Colon will go out.
212 Current Peak Force reading and message will be transmitted.
The MP4 includes a 4-foot long RS-232 extension cable, with DB25 male connectors, used to connect
the MP4 to either a serial printer or the RS-232C serial port of a computer.
Calibration Weights
A set of uncertified calibration weights is supplied with the MP4. When used carefully, with the weight
hanger supplied, they provide an effective method of re-calibration. The weights supplied with the MP4
are: 1, 2, 5, 10, 20, 50 and 100 grams. A weight hanger and a 300 and a 500 gram weight are supplied
with the 1000gf beam. The weight rack, which is supplied, provides a convenient method for storing the
weights. These uncertified weights are within 1/4% of the weight indicated.
Standard Device Holder
The Model DHF device holder, included with each MP4, is designed for flat substrates which range
from 1/4 to 2 inches square. The base of the device holder is spring loaded so that it can be manually
depressed up to 1/4 inch. This feature allows easy removal of the hook from deep packages. The
overall size of this device holder is 3 inches (7.6 cm) diameter by 2.375 inches (6 cm) high.
In additional to the standard device holder, the following optional device holders may be ordered:
a Model DHD device holder, with spring-loaded base, is designed for 0.3 to 0.6 inch wide side-brazed
or 0.250 inch wide CERDIP packages with lengths up to 2.070 inch.
b Model DHL device holder is designed for lead frames which have eight to 40 leads.
Optics
An optional stereo zoom optic may also be ordered. The unit has 0.7 – 3x magnification, with 20x
eyepiece and a 0.5 object lens. The optic includes the arm and porthole assembly.