Voltage Measurement; Measuring Dc Voltage (Dc V) - Hioki 3285 Instruction Manual

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2.3 Voltage Measurement

2.3.1 Measuring DC Voltage (DC V)

1. Press to display
2. Slide the slide cover up using the slide knob. Next,
insert the red test lead to V and the black test lead
to COM of the voltage measurement terminal.
3. Switch between the auto range and the manual range
as necessary.
4. If the counter does not show zero, switch to the range
you will use (manual range), and press
to perform an auto-zero adjustment.
annunciator lights to indicate that auto-zero-
ADJ
adjustment is complete.
5. Carefully contact the test leads to a circuit.
･ You can perform the auto-zero-adjustment up to 4%
NOTE
of the range.
･ When you switch ranges after auto-zero adjustment,
deviation of the adjustment value will prevent
accurate measurement. Always perform the auto-zero
adjustment after switching ranges. (Do not perform
auto-zero adjustment when using the auto range.)
･ A lit － annunciator indicates that potential is
higher at the black test lead than at the red test lead.
･ The DC V mode permits only DC voltage
measurements that does not include the AC
component (see 1.5: Modes).
･ Every range will display up to 125% of the range,
however, only the range from 10% to 100% can be
displayed with guaranteed accuracy.
･ At any range, gross errors may occur at 1% or below
of the range, whose accuracy is not guaranteed, as a
result of internal corrective calculations.
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Chapter 2 Measurement Procedure
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