Most power supply manufacturers define static regulation as the change in output voltage resulting directly from a change in input supply voltage (Line-regulation) or from a change in load resistance (load-regulation).  Changes in output voltage resulting from changes in temperature or time are specifically excluded from this definition.  As a result, static regulation is measured at "constant temperature" and over "short" time intervals (i.e., several seconds, allowing the output to stabilize after the load has been charged).

Test Setup

Connect the output voltage measuring circuit as shown in Figure 3.

Test Method, Static Line Regulation

Select the test setup for constant (fixed) load. Adjust the supply input voltage over the specified range by means of the autotransformer and record the changes in DC output voltage. Regulation is specified as the change expressed as a % of the output voltage.

Test Method, Static Load Regulation

Connect the output voltage measuring circuit as shown in Figure 3. Adjust the input voltage to nominal. Vary the load and record the change in output voltage. Static load regulation may be specified at other than nominal input voltage and at various output voltage levels, if desired.

Note:  (1) All the above applies only to static regulation. Dynamic regulation may be important if the line or load may be expected to change abruptly or when the load is sensitive to transient deviations of the output voltage. If it is necessary to measure dynamic regulation, please consult the Glassman Engineering Department.  (2) The voltage measuring meter, M, must have sufficient resolution to indicate the small regulation change levels.

Figure 3

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