Ametek SEQUOIA Series - Page 293

Sequoia / Tahoe Series User Manual California Instruments
270 M447352-01 REV-A
9. Calibration
This section presents the procedures required to calibrate the power supply. It is recommended that
calibration should be performed at 12-month intervals, or following service if subassemblies are replaced.
The procedures are performed using SCPI commands through the remote digital interface using either the
Sequoia/Tahoe Virtual Panels GUI program or a communications program such as HyperTerminal. For
details pertaining to operation through the remote digital interface, refer to the Sequoia Series
Programming Manual, M447353-01 Tahoe Series Programming Manual P/N M445374-01 for more details.
9.1 Calibration Equipment
Table 9-1 presents the equipment required to conduct the calibration.
Equipment Model
Power Analyzer Tektronix, Model PA3000, or equivalent
Digital Phase Meter Krohn-Hite, Model 6620, or equivalent
DVM Fluke, 8508A, or equivalent
Function Generator Keysight, Model 33210A, or equivalent
Differential Probe Tektronix, Model P5202A, or equivalent
Load Bank Resistive loads resistors at power levels per model rating
Computer Controller
Remote communications program through LAN, USB, or RS-232C
Table 9-1. Calibration Equipment
9.2 Source Mode Calibration Procedures
9.2.1 Preparation for Calibration
WARNING!
Hazardous voltages exist at the rear of the power source. Care must be
taken to avoid contact with the AC input and AC/DC output terminals.
Only authorized personnel should perform these procedures.
Only technically trained personnel, who understand the operation of the power source, and are capable
of taking accurate readings and following the procedure steps, should perform calibration. The
calibration procedures require precision instrumentation to measure voltage and current; when
substituting for the recommended test equipment, ensure that the accuracy is adequate so that
excessive error is not incurred, compared to the specifications of the parameters that are to be
calibrated.
To set up the alignment procedures, perform the following initial steps:
1. Disconnect AC mains power when making setup connections.
2. Connect the test equipment and loads to the output and control inputs of the power source.
3. Connect the digital voltmeter to the output of the power source.
4. Allow a 30-minute warm-up period for the power source and test equipment before conducting
the calibration procedure.