HP 6034a schematic

Agilent Technologies, Inc.
395 Page Mill Rd.
Palo Alto, California 94306

[phone] telephone
[phone] alternate
+1 650 facsimile
www.agilent.com

Memory Type: CMOS SRAM

Memory Size: 32KB

Memory Function: Store readings and error messages

User Modifiable (Y/N): Yes

Volatile (Y/N): Yes

Memory Erase Processes: Power cycle of the unit erases all volatile memory

 Reading Storage (up to 512 reading may be stored in volatile memory; they can be cleared with

a power cycle or by overwriting with other readings).

 Error message storage (cleared by power cycle or by sending the *CLS command).

Memory Type: OTPROM

Memory Size: 256KB

Memory Function: stores operating code for the product

User Modifiable (Y/N): No

Volatile (Y/N): No

Memory Erase Processes: Contains operating code for the product. If you clear this, the instrument is

dead.

Memory Type: CMOS EEPROM

Memory Size: 512B

Memory Function: Store calibration constants and other non-volatile storage

User Modifiable (Y/N): Yes

Volatile (Y/N): No

Memory Erase Processes: Calibration constants are overwritten during the calibration/adjustment

process. Other non-volatile storage must be manually overwritten with default information using the
front panel.

 Calibration Message (non-volatile 40 character message that can be over-written).
 Calibration Count (this is a number that is stored by the instrument and tracks the number of

single point adjustments that have been done since the product was manufactured – the
maximum value for this number is 32,767 after which it wraps around to 0).

The following items must be overwritten manually:

1) GPIB Address

2) Programming Language Selected.

3) Parity for RS-232 Operation.

4) Remote Interface Selection (RS-232 or GPIB).

5) Baud Rate Setting.

6) Display Format.

7) Beeper State

Memory Information and Procedures

Product: 34401A 6½ Digit Digital Multimeter
Date: June 2, 2009

Memory Type: OTPROM

Memory Size: 8-Bit MCU w/

8K EPROM

Memory Function: Contains operating code for the earth-referenced logic which handles instrument
I/O on GPIB and RS232

User Modifiable (Y/N): Yes

Volatile (Y/N): No

Memory Erase Processes: Contains operating code for the product, if erased I/O functions will not

operate.