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6-2
Range, Units, Digits, Rate, and Filters
Range, units, and digits
Range
The ranges for each measurement function are listed in Table 6-1. The range setting (fixed or
AUTO) is remembered by each function.
The full scale readings for every measurement range are 5% over range. For example, on the
20V range, the maximum input voltage is ± 21V. Input values that exceed the maximum readings
cause the overflow message (“OVERFL0W”) to be displayed.
Manual ranging
To select a range, press the RANGE
or
key. The instrument changes one range per
key-press. The selected range is displayed momentarily. If the instrument displays the “OVER-
FLOW” message on a particular range, select a higher range until an on-range reading is dis-
played. Use the lowest range possible without causing an overflow to ensure best accuracy and
resolution.
Autoranging
When using autorange, the instrument automatically goes to the most sensitive available
range to measure the applied signal. Up-ranging occurs at 105% of range, while down-ranging
occurs at the range value. For example, if on the 20V range, the instrument will go up to the
200V range when the input signal exceeds 21V. While on the 200V range, the instrument will
go down to the 20V range when the input level goes to 20V.
The AUTO key toggles the instrument between manual ranging and autoranging. The AUTO
annunciator turns on when autoranging is selected. To disable autoranging, press AUTO or the
RANGE
or
key. Pressing AUTO to disable autoranging leaves the instrument on the present
range.
Table 6-1
Measurement ranges
V
I
Ω
Q
2V
20pA
2k
Ω
20nC
20V
200pA
20k
Ω
200nC
200V
2nA
200k
Ω
2µC
20nA
2M
Ω
20µC
200nA
20M
Ω
2uA
200M
Ω
20uA
2G
Ω
200uA
20G
Ω
2mA
200G
Ω
20mA
Summary of Contents for 6514
Page 203: ...14 CommonCommands...
Page 207: ...15 SCPISignalOriented MeasurementCommands...
Page 235: ...18 PerformanceVerification...
Page 254: ...19 Calibration...
Page 274: ...20 RoutineMaintenance...
Page 278: ...A Specifications...
Page 282: ...B StatusandErrorMessages...
Page 288: ...C GeneralMeasurement Considerations...
Page 294: ...D DDCEmulationCommands...
Page 299: ...E ExamplePrograms...
Page 306: ...F IEEE 488BusOverview...
Page 320: ...G IEEE 488andSCPI ConformanceInformation...
Page 324: ...H CalibrationOptions...