SHIMPO 921A - Manual (Page 2)

TRICOR Systems Inc.
1.1
SECTION 1
INTRODUCTION
The Model 921A Displacement - Force (DF) Test Station operation is similar
to the highly acclaimed Models 951A and 961A Test Stations. The high
accuracy and many of the features of the 951A and 961A have been
incorporated in the 921A. Testing on the 921A is performed using remote
test fixtures similar to the 961A. The remote operation permits testing a wide
variety of components/devices and also allows the 921A to operate as part of
a fully automated test line. Keyboards, springs, switches and other
components requiring measurement of displacement, force, or resistance
(one channel optional) can be tested manually, individually or with automatic
feed. The 921A is also ideally suited for engineering investigation and new
product development. Table 1-1 lists the specifications of the 921A.
When interfaced with a personal computer (PC), the resulting test data can
be viewed, analyzed, and printed. The 921A stores test criteria for one test
configuration. To assure simplicity of operation and efficient, effective, error-
free use by anyone, the test station displays operator prompts and provides a
minimum of operator controls: a MODE switch and a TEST switch.
Three operating modes are featured: 1) Local - a pass/fail indication is
provided during standalone operation, test results are not stored; 2) PC - a
PC interfaces with the test station and is used to configure device test criteria
and view stored test results; and 3) Engineering - test data is logged for
every 0.0001 inch of travel and is available for viewing at the PC.
The 921A features a precision lead-screw drive mechanism used to trip the
device under test which serves to guarantee repeatability of results.
Prior to testing, the operator must perform a calibration cycle (refer to section
4.1). Testing cannot be initiated until a calibration cycle has been performed.