Test Products International 460 - Manual (Page 33)

Appendix A
Test and Calibration
This chapter is designed to re-affirm that your TPI Scope Plus 460 is functioning correctly and is
on a par with the original calibration. This test and calibration procedure can be used as an
annual test, goods inward (Acceptance) test, or re-affirmation test when readings have not been
expected ones.
Test Procedures
The TPI Scope Plus 460 has no built-in test programs, however, the following procedures can be
used to perform a quick functional check on most 460 operations. Procedural titles that are fol-
lowed by an asterisk (*) are less important, and can be considered optional in cases where a
quicker spot test is required.
Initial Setup
The following tests should be made with an adequate battery charge and with the power charge
plug in place, and the RS232 cable disconnected. If the battery has previously been low, allow at
least 15-minutes for the battery charge to build up.
On power up (press and briefly hold the POWER ON button), allow a further 5-minutes for the
circuitry, and LCD screen to stabilize. After stabilization, press USER, then F2 to arrive at CON-
TRAST. Press ENTER, and use the Up / Down keys to adjust for optimal contrast. One way to do
this is to press the Up arrow until the background begins to darken and then backtrack down by
pressing the down arrow once. In any case , the waveform and alphanumeric characters should
both be black and stand out in strong contrast to the background
Check the brightness by pressing the blue button with the Sun icon. Continue pressing. After
10-counts, it should resume to maximum brightness.
If any of the above steps perform unsatisfactorily, you either have an undercharged battery, or a
malfunctioning LCD display. Check with the service department (see phone numbers on Page 1
of this document), before returning the unit.
A-1
460 User s Guide Test and Calibration