3-9. NONVOLATILE MEMORY
The 4278A uses two types of non-volatile memory: the internal EEPROM and the external
memory card.
3-9-1. INTERNAL MEMORY
The following data is stored in the 4278A's internal EEPROM.
Stray admittance data for OPEN compensation (Cp-G)
Residual impedance data for SHORT compensation (Ls-R)
Working standard reference data for STD compensation
Working standard actual measurement data for STD compensation
Offset capacitance value for OFFSET A
OFFSET B parameter and value
H P-IB settings (Addressable/Talk only and Address)
NOTE
The contents of the EEPROM may change if the 4278A is repaired.
3-9-2. MEMORY CARD
The memory card is an EEPROM card that is approximately the size of a credit card. The
following single set of instrument setup data can be stored in a memory card. Memory card
data will be automatically recalled if the the memory card is inserted when the 4278A is
turned on, and when a memory card is inserted and the LOAD key on the front panel is
pressed.
Measurement Parameter (MEAS PARMTR) selection
Test Signal FREQuency selection
High ACCuracy Mode setting (ON or OFF)
Test Signal Voltage (OSC LVL)
1 kHz MEASurement RANGE Selection
1 MHz MEASurement RANGE Selection
1MHz High Accuracy MEASurement RANGE Value
INTEGration TIME
Averaging Time (AVG RATE)
Trigger DELAY TIME
Trigger Mode
CABLE LENGTH Selection
OPEN COMPENsation (ON or OFF)
SHORT COMPENsation (ON or OFF)
STanDard COMPENsation (ON or OFF)
Display OFFSET (ON or OFF)
All Comparator Settings (except for count data)
DISPLaY PAGE Format
Number of Display Digits
Display Value (MEAS or TOL)
Value Monitor Selection
Memory Card ID Comment'
' Refer to Paragraph 3-9-3.
3.14
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