Front Panel Operation
Auto Range Versus Locked Range
4
4-17
4-19. Auto Range Versus Locked Range
A softkey is provided to toggle between the ranging method auto or locked. This feature
is available only for single-output dc volts and dc current outputs.
330 mV
auto
auto
locked
When auto is selected (the default setting), the calibrator automatically selects the range
that provides the best output resolution. When locked is selected, the calibrator locks the
selected range and will not change ranges when you are editing the output, or entering
new outputs. Values lower or higher than the locked range are not allowed. The locked
selection is usually made when you do not want range changes that may cause a small
perturbation in the output, e.g., when checking the linearity of a given multimeter range.
4-20. Setting the Output
Setting the calibrator output is similar to entering values into a calculator: press the keys
that represent the value you desire and then press a units key to identify which of the
volts, amps, hertz, etc. you want the value to represent. The control display indicates the
value and units you select as you type them into the calibrator. Once you are satisfied
with the value and units, press E . If the output display indicates STBY, press
O to output the selection. The display of a small “u” (unsettled) in the Output Display
indicates the calibrator is allowing for its internal circuitry to settle.
For example, to set the output to 10 V dc, press:
1 → 0 → V → E → O
To set the output to 20 V ac at 60 Hz, press:
2 → 0 → V → 6 → 0 → H → E → O
To change the output to dc, press:
0 → H → E or I → E
Step-by-step procedures are provided for each output function as follows:
• DC voltage
• AC voltage
• DC current
• AC current
• DC power
• AC power
• Dual DC voltage
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