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17. Current Units Indicator
These LEDs indicate the units of the current in milliamperes or amperes.
18. Volt-Ampere Display
Displays the five digit value of the volt-ampere setting which has been entered through the
keypad. Displays the option code immediately after power up.
19. Key Voltage Status LED
Step 1 in establishing the output setting. When illuminated a voltage value may be entered.
20. Key Volt-Ampere Status LED
Step 2 in establishing the output setting. When illuminated a volt-ampere value may be entered.
21. Select Mode Status LED
Step 3 in establishing the output setting, 811A only. Directs user to either press enter for watt
meter testing, or to key in the volt-ampere-second or event count setting if energy meter testing is
desired. (811A only)
22. Gate Indicator (811A only)
This LED is illuminated between the initiation and termination of the energy time gate, or by
selection, when an event occurs.
23. Error Indicator
Illuminated whenever the following Series 800 limits are exceeded.
Voltages greater than 749 volts.
Currents greater than 50 amperes, or less than 0.011 amperes.
Rear panel fuse out.
Flashes for failure to synchronize.
24. % Deviation Display
Displays the unit under test error in percent of setting as a 2
½
digit decimal readout. The display
is blank for the Deviation "Off" position or if 0 PF is selected.
25. Non-Sinusoidal Current Waveshape Selector (800A only)
Two push buttons, one of which selects a 90
o
chopped waveform (approximately ½ power).
26. Deviation Range Selector Switches
Three switches selecting OFF and full scale ranges of 0.1% and 1%.
27. Fractional Setting Control and Indicator
This control divides the power setting in fifths, fourths, or thirds. The indicator is illuminated to
show the fractional setting function is in use.
28. Deviation Control
Potentiometer which inserts change in volt-amperes output to measure meter under test error.
29. Connector, IEEE-488 Standard Interface, J46.
30. Line Frequency Synchronizing Switch
Switch to enable or disable output frequency synchronization to the power line (mains) frequency.
Frequency vernier must be in the off position when line synchronization is enabled. Relative
frequency switch must be selected.
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