31
FUNCTIONAL ‘QUICK CHECKS’
The following checks can be used to verify instrument operation and to help narrow
the focus for solving problems.
At power-up after a manual power-down, the ES3 logo should either scroll onto the
LCD or appear quickly, depending on the scroll setting, and the backlight should
be on. After an inactivity timeout power-down, the logo is bypassed. In either
case, the ES3 should proceed to the “Select An Option:” screen and should
respond to keypad control.
Keypad operation can be tested by pressing keys and verifying that the
appropriate response occurs (e.g., pressing {▲} increases level, {►} increases
frequency, etc.). The speaker should produce audible ‘ticks’ when keys are
pressed while in the menu system (keys are silent in test mode).
Next, check signal generation and keypad control. Set frequency to 1000 Hz, set
level to 70 dB HTL, and press {Ο}. A tone (pulsed or continuous) should be heard
at a comfortable loudness level. Verify that the signal is heard at the correct ear.
Press {▲} {Ο} and {▼} {Ο} to verify that signal loudness increases or decreases,
respectively. Press {2} {Ο} and verify that the signal is presented to the other ear.
Plug in a response button and verify that pushing the button causes the “∗“
symbol to appear near the center of the display.
Enter the menu sequence ⌐S
ETUP ⌐DATE ⌐SET TIME and verify that the time is
correct and that the seconds count is incrementing.
Attach the printer, verify that printer output is selected via the menu sequence
⌐S
ETUP ⌐COMMUNICATIONS ⌐DEFAULT OUTPUT, and transmit data to the printer via
the ⌐S
END DATA main menu option.
To Next Page
Loading...