Specifications

Calibration Procedure

Enter Calibration Mode

Voltage Calibration - With Remote Sensing

Voltage Calibration - With Local Sensing

Current Calibration

Enter a Calibration Date and Log Out

HAZARDOUS VOLTAGES The output may be enabled at turn-on, depending on the

*PON setting. Check this setting before attaching anything to the output terminals.

Introduction

The instrument features closed-case electronic calibration; no internal mechanical adjustments are required. The

instrument calculates correction factors based on input reference values that you set and stores correction factors in

non-volatile memory until the next calibration adjustment is performed. This EEPROM calibration memory is not

changed by cycling power or *RST.

l Refer to Recommended Test Equipment and Setups for the equipment list and test setups required for calibration.

l Refer to the Measurement Techniques section for information about setting up the voltmeter, connecting the cur-

rent shunt, and connecting the electronic load..

l The correct password is required to enter the Admin menu, which contains the calibration function. The password

is factory-set to 0 (zero). You can change the password once calibration mode is entered to prevent unauthorized

access to the calibration mode. Refer to Password Protection for more information.

l When calibrating the unit using SCPI commands, most steps involve sending a *OPC? query to synchronize with

the instrument’s command completion before proceeding. The response from the instrument must be read each

time *OPC? is given. Additionally, the relatively slow settling times and slew rates of the power supply must be

taken into account. Use "Wait" statements to allow for the appropriate settling times for the power supply.

l Any calibration section can be run and saved independently of the other sections. As each calibration section is

completed, the instrument calculates new calibration constants and begins using them. However, these constants

are not saved in nonvolatile memory until a SAVE command is explicitly given.

l Exit the calibration mode either by logging out of the Admin menu or by sending CAL:STAT OFF. Note that any cal-

ibration section that was calibrated but not saved will revert to its previous calibration constants.

HAZARDOUS VOLTAGES All models generate voltages in excess of 60 VDC, with some

models rated at up to 1,500 VDC! Ensure that all instrument connections, load wiring,

and load connections are either insulated or covered so that no accidental contact

with lethal output voltages can occur.

Always turn off the output when connecting or disconnecting any equipment on the

sense or output terminals of the unit.

Agilent N8900 Series Operating and Service Guide 127