Similar to other measurement instrumentation, a Tektronix digital multimeter (DMM) must be calibrated to ensure accuracy and reliability. Time, environment and physical use of a Tektronix digital multimeter cause the characteristics of the DMM to change. For this reason, it is extremely important to know the basics of Tektronix digital multimeter calibration to ensure your instrument is functioning properly before and after calibration.
Below we have listed four calibration basics to be aware of for your Tektronix digital multimeter:
EXPECT THE DRIFT
A Tektronix digital multimeter is a commonly used piece of test equipment and is heavily relied on to operate properly. To ensure proper operation of a Tektronix digital multimeter calibration should be performed regularly. This is because DMM, like most measurement devices, are prone to drift. With time and continued use, a Tektronix digital multimeter will drift out of proper calibration, therefore, frequent calibration must be completed to verify the DMM performance.
RECOGNIZE THE DMM CALIBRATOR REQUIREMENTS
Proper calibration of a Tektronix digital multimeter must be done by the proper calibrator. A DMM calibrator should consist of the following characteristics:
- Calibrator specifications should be at least four times better than those of the DMM it is testing.
- Calibrator functions should cover all functions of the DMM it is calibrating and needs to be able to confirm that the DMM is calibrated for all function ranges. Notably, Tektronix digital multimeters have at least five functions with a variety of ranges.
KNOW THE SEQUENCES OF CALIBRATION MAY VARY
It’s important to remember that the sequence of Tektronix digital multimeter calibration may vary depending on the “as received” calibration state of the instrument. The three sequences of calibration include:
- Calibration only with no adjustments
- Adjustments and post-adjustments calibration
- Pre-adjustment calibration, adjustment and post-adjustment calibration
The third sequence is the most common sequence for Tektronix digital multimeters calibration.
CONFIRM THE INFORMATION ON THE CALIBRATION CERTIFICATE
You should always confirm the information on the calibration certificate after your DMM has been calibrated. A Tektronix digital multimeter calibration certificate should include the following information:
- General information regarding the calibration
- Method of calibration
- Identification of the procedures
- Calibration results
- Measurement uncertainty ratio
- Additional comments regarding the DMM