Hioki IM3533, Instruction Manual

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Safety Information
4
Accuracy
We define measurement tolerances in terms of f.s. (full scale), rdg. (reading) and dgt. (digit) values, with
the following meanings:
To ensure safe operation of measurement instruments, IEC 61010 establishes safety standards for vari-
ous electrical environments, categorized as CAT II to CAT IV, and called measurement categories. These
are defined as follows.
Using a measurement instrument in an nvironment esignated with a higher-numbered category than that
for which the instrument is rated could result in a severe accident, and must be carefully avoided.
Notation
Symbols in this manual
Indicates the prohibited action.

p. )
Indicates the location of reference information.
* Indicates that descriptive information is provided below.
[ ]
Menus, commands, dialogs, buttons in a dialog, and other names on the screen and the
keys are indicated in brackets.
CURSOR
(Bold character)
Bold characters within the text indicate operating key labels.
Windows
Unless otherwise specified, “Windows” represents Windows 95, 98, Me, Widows NT4.0,
Windows 2000, Windows XP, Windows Vista or Windows 7.
Dialogue Dialogue box represents a Windows dialog box.
f.s. (maximum display value or
scale length)
The maximum displayable value or scale length. This is usually the name
of the currently selected range.
rdg. (reading or displayed value)
The value currently being measured and indicated on the measuring instrument.
dgt. (resolution)
The smallest displayable unit on a digital measuring instrument, i.e., the in-
put value that causes the digital display to show a "1" as the least-signifi-
cant digit.
Measurement categories
CAT II
Primary electrical circuits in equipment connected to an AC electrical outlet by a power cord (portable
tools, household appliances, etc.) CAT II covers directly measuring electrical outlet receptacles.
CAT III
Primary electrical circuits of heavy equipment (fixed installations) connected directly to the distribution
panel, and feeders from the distribution panel to outlets.
CAT IV
The circuit from the service drop to the service entrance, and to the power meter and primary over-
current protection device (distribution panel).