Keithley DMM6500 User Manual

DMM6500
6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 4: TS
P command reference
DMM6500-905-01 Rev. E June 2021 4-9
cal.unlock()
This attribute unlocks calibration operations.
Type TSP-Link accessible
Affected by Where saved Default value
Function
No
Usage
cal.unlock("password")
password
A string containing the password to unlock calibration
Details
Calibration data is locked during normal operation. To perform calibration, you must unlock
calibration.
The default password is KI000CAL. You can use cal.password to change the default.
An error is generated if this command is issued when calibration is already unlocked.
Example
cal.unlock("KI000CAL")
-- Perform operations to generate the calibration data
cal.save()
cal.lock()
Unlock the calibration for the instrument using the default password.
Save the calibration data.
Lock the calibration data.
Also see
cal.lock() (on page 4-6)
cal.password (on page 4-7)

Keithley DMM6500 Specifications

General

Resolution	6.5 digits
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
DC Current Range	10 µA to 10 A
AC Current Range	10 µA to 10 A
Temperature Range	-200 °C to 1820 °C
Display	5-inch capacitive touch screen
Resistance Range	100 MΩ
Frequency Range	3 Hz
Sampling Rate	1 MS/s
Connectivity	USB, LAN, GPIB (optional), TSP-Link
Memory	7 million readings

Summary

DMM6500 6½-Digit Multimeter Calibration and Adjustment Manual

Safety Precautions

Section 2 Performance Verification

Verification Test Requirements

Calibration Verification Limits

Performing the Verification Test Procedures

Summarizes the calibration verification test procedures and items to consider before testing.

Front-Panel Calibration Verification

Details verification procedures performed using the DMM6500's front-panel terminals.

DC Voltage Verification

Describes the procedure to verify the accuracy of the DMM6500's DC voltage measurements.

Verify DC Voltage Accuracy for the 100 mV to 1000 V Ranges

Details the steps and connections for verifying DC voltage accuracy across multiple ranges.

DC Voltage Range Verification

AC Voltage Verification

Details the procedures for verifying the AC voltage measurement accuracy of the DMM6500.

Verify AC Voltage Accuracy for the 100 mV to 100 V Ranges

AC Voltage Range Verification

Verify AC Voltage Accuracy for the 750 V Range

Digitize DC Voltage Verification

Explains how to verify the accuracy of digitized DC voltage measurements on the DMM6500.

Verify the Digitize Voltage 100 mV to 1000 V Ranges

Digitize Voltage Range Verification

Frequency Verification

Details the procedure to verify the frequency measurement accuracy of the DMM6500.

Simulated Thermocouple Type J Temperature Verification

Explains how to verify temperature measurements using a simulated Type J thermocouple.

Simulated RTD Temperature Verification

Describes the process for verifying temperature measurements using a simulated RTD.

Verify the Simulated RTD Temperature

Resistance Verification

Outlines the procedures for verifying the resistance measurement functions of the DMM6500.

Four-Wire Resistance Verification

To Verify 4-Wire Resistance Accuracy

Verify 2-Wire Resistance Accuracy

DC Current Verification

Explains how to verify the DC current measurement accuracy of the DMM6500.

DC Current 10 µA to 100 mA Range Verification

DC Current 100 mA to 3 A Range Verification

Digitize Current Verification

Explains how to verify the digitized DC current measurement accuracy.

Verify Digitize Current 100 µA to 3 A Ranges

AC Current Verification

Details the procedures for verifying the AC current measurement accuracy of the DMM6500.

Verify AC Current on the 100 µA to 3 A Ranges

Capacitance Verification

Details the procedure for verifying the capacitance measurement accuracy.

Verifying Zero Values using a 4-Wire Short

Verify DC Voltage Zero Values using the 4-Wire Short

DC Current 10 A Range Verification

Outlines the procedure for verifying the 10 A DC current range.

Digitize Current 10 A Range Verification

Details the procedure for verifying the 10 A digitized current range.

AC Current 10 A Verification

Explains how to verify the AC current 10 A range.

Section 3 Adjustment

Recommended Test Equipment

Lists the essential test equipment required for performing DMM6500 calibration adjustments.

General Adjustment Considerations

Lists crucial factors to consider before and during the calibration adjustment process.

Unlock Calibration

Remote Calibration Adjustment Procedures

Introduces the sections detailing remote adjustment procedures and command parameters.

Front-Terminal Adjustments

Details front-terminal adjustment procedures, including 4-wire short and open circuit methods.

Rear-Terminal Adjustments

Details rear-terminal adjustment procedures, including 4-wire short and open circuit methods.

Resistance Adjustment

Outlines the procedure for performing resistance adjustments on the DMM6500.

DC Voltage Adjustment

Details the procedure for performing DC voltage adjustments.

DC Current Adjustment

Outlines the procedure for performing DC current adjustments.

DC Current 10 A Range Adjustment

AC Voltage Adjustment

Details the procedure for performing AC voltage adjustments.

AC Current Adjustment

Outlines the procedure for performing AC current adjustments.

AC Current 10 A Range Adjustment

Frequency Adjustment

Save Calibration and Set Adjustment Dates