Arbiter Systems 931A, Operation Manual

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2.7.3 Auto-Shutdown Mode
Auto-Shutdown Mode extends the battery-life by deactivating the instru-
ment power if no input signals are present and no keystrokes occur within
a period of approximately 10 minutes. To return to normal operation,
simply press the ON/OFF key. Activate the Auto-Shutdown Mode by
using the MENU key (see Section 3.3.1.13).
2.8 Start-Up Sequence
Several tasks are performed during the power-on initialization sequence.
First, the Model 931A reads calibration data from the EEPROM (installed
only in units with serial numbers greater than A0194). The initial sign-on
message reports any errors in the calibration data along with the cali-
bration date. These errors are corrected using a built-in Hamming Code
Algorithm. If the number of reported errors increases with subsequent
start-ups it is an indication that the EEPROM should be replaced. The
calibration date is displayed as a decimal number with the format:
MMDDYY.
The second part of the sign-on display shows the ROM program
copyright date, the Help ROM version date and the DSP ROM version
date. The DSP ROM date is displayed as a decimal number in the format:
MMDDYY. As new features are added to the Model 931A these dates are
updated.
2.8.1 Holding the Start-Up Sequence
Holding the escape key during the startup sequence holds the startup
displays, including the two parts mentioned above.
Holding the enter
key during the startup sequence allows resetting the setup parameters of
calibration.
2.8.2 Reset – Instrument Default Setup
To reset the instrument to original default conditions when it shipped
from the factory, follow the resetting procedure listed below. Three menu
selections are available, shown in the simulated display below. Normally,
only the first or second items should be selected. Selecting FULL will
completely reset the instrument and calibration constants will be lost. To
reset the 931 to factory defaults, select PARTIAL. To escape from this
menu, select EXIT and press the ENTER key.
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