5
Safety Information
Accuracy
We define measurement tolerances in terms of f.s. (full scale), rdg. (reading) and setting values,
with the following meanings:
f.s. (maximum display value
or scale length)
The maximum displayable value or scale length.
For this instrument, the maximum displayable value is the range (V/div)
times the number of divisions (20) on the vertical axis.
Example: When range is 1 V/div, f.s. = 20 V
rdg. (display value)
The value currently being measured and indicated on the measuring
instrument.
setting
Indicates the value set as the output voltage, current, or other quantity.
Measurement Categories
To ensure safe operation of measuring instruments, IEC 61010 establishes safety standards for
various electrical environments, categorized as CAT II to CAT IV, called measurement categories.
DANGER
•
Using a measuring instrument in an environment designated with a higher-
numbered category than that for which the instrument is rated could result in
severe accidents, and must be carefully avoided.
•
Using a measuring instrument that has no category rating in an environment
designated with the CAT II to CAT IV category could result in severe accidents,
and must be carefully avoided.
CAT II: When directly measuring the electrical outlet receptacles of the primary electrical circuits in
equipment connected to an AC electrical outlet by a power cord (portable tools, household
appliances, etc.)
CAT III: When measuring the primary electrical circuits of heavy equipment (fixed installations)
connected directly to the distribution panel, and feeders from the distribution panel to
outlets
CAT IV: When measuring the circuit from the service drop to the service entrance, and to the power
meter and primary overcurrent protection device (distribution panel).
T
Outlet
CAT II
Internal Wiring
Distribution panel
Service Entrance
Service Drop
CAT IV
Power Meter
CAT III
Fixed Installation
The applicable measurement category is determined by the module being used.
Refer to “18.6 Module Specifications” (p. 360).
10
9
8
7
6
5
4
3
2
1
Appx.
Index
Содержание MR8827
Страница 19: ...14 Operation Precautions ...
Страница 81: ...76 Start and Stop Measurement ...
Страница 111: ...106 Manage Files ...
Страница 125: ...120 Miscellaneous Printing Functions ...
Страница 143: ...138 View Block Waveforms ...
Страница 191: ...186 Setting Output Waveform Parameters ...
Страница 291: ...286 FFT Analysis Modes Measurable Ranges With Octave Analysis 1 1 OCT 1 3 OCT ...
Страница 292: ...287 FFT Analysis Modes 1 1 OCT 1 3 OCT 13 FFT Function ...
Страница 293: ...288 FFT Analysis Modes 1 1 OCT 1 3 OCT ...
Страница 295: ...290 FFT Analysis Modes ...
Страница 309: ...304 Editor Command Details ...
Страница 387: ...382 Module Specifications ...
Страница 405: ...400 Dispose of the Instrument Lithium Battery Removal ...
Страница 431: ...A26 FFT Definitions ...
Страница 436: ......