1 Introduction
This document presents an overview of the calibration process and functionality testing
performed on the MicroTymp2 handle by the calibration system. The primary purpose of
the calibration system is to calibrate MicroTymp2 handles after they have been as-
sembled. An important secondary purpose is to perform basic functionality testing of the
handle to insure that each of the major components are working. These functionality
tests fall into two categories. The first includes those tests that are an integral part of the
calibration process. All other tests are incidental to calibration and are performed only to
insure that the unit is working. These latter tests may be performed during calibration or
separately.
2 Calibration Process
The MicroTymp2 handle calibration process is organized around the following steps.
o
calibrate speaker gain pot
o
calibrate microphone gain pot
o
calibrate admittance offset pot
o
calibration pressure offset pot
o
calibration pressure gain pot
o
motor speed table calibration
Additional functional testing is interspersed throughout these tests to take advantage of
the equipment setup at the time.
o
pressure leak test
o
THD test
o
Vea Check
o
Button test
o
LCD test
o
Tymp Noise Test
2.1
Background Information
Each digital potentiometer has an address in the I
2
E
2
PROM that the handle will read
and initialize the potentiometer to during power up. Calvin will determine the best set-
tings for these pots and store the values in the proper I
2
E
2
PROM locations during cali-
bration.
For brevity, I
2
E
2
PROM is referred to as PROM throughout this document.
22
Error Handling
When an error is detected, the operator will have the option of retrying the test or failing
the unit. If the unit if failed, a reason for the failure will be displayed. Additionally, the
current log file willhave additional information leading up to the failure. See the section
on Log Files for more information.
