Greenlee DM-800 Manual De Instrucciones página 21

Specifications (cont'd)
Overvoltage Categories:
DM-800:
ΩV
Terminal: Category III, 600 VAC and 600 VDC; Category II, 1000 VAC and
1000 VDC
µA and mA Terminal: Category III, 240 VAC and 150 VDC
A Terminal: Category III, 240 VAC and 150 VDC
DM-810 and DM-820: Meets the requirements for double insulation to IEC 61010-1
(1995), EN61010-1 (1995), UL3111-1 (6.1994), CSA C22.2 NO. 1010-1-92, and IEC
61010-1 second edition draft (1999) to terminals:
ΩV
Terminal: Category III, 1000 Volts ac and dc, and Category IV, 600 Volts ac
and dc
A Terminal: Category III 1000 Volts ac and dc, and Category IV 600 Volts ac and dc
µA and mA Terminal: Category III and Category IV 600 Volts ac and 300 Volts dc
* Noise rejection is the ability to reject unwanted signals, or noise.
• Normal mode voltages are AC signals that can cause inaccurate DC measurements.
NMRR (Normal Mode Rejection Ratio) is a measure of the ability to filter out these
signals.
• Common mode voltages are signals present at the COM and + input terminals, with
respect to ground, that can cause digit rattle or offset in voltage measurements. CMRR
(Common Mode Rejection Ratio) is a measure of the ability to filter out these signals.
Per IEC1010 Overvoltage Installation Category
Overvoltage Category I
Equipment of Overvoltage Category I is equipment for connection to circuits in which
measures are taken to limit the transient overvoltages to an appropriate low level.
Note: Examples include protected electronic circuits.
Overvoltage Category II
Equipment of Overvoltage Category II is energy-consuming equipment to be supplied from the
fixed installation.
Note: Examples include household, office, and laboratory appliances.
Overvoltage Category III
Equipment of Overvoltage Category III is equipment in fixed installations.
Note: Examples include switches in the fixed installation and some equipment for industrial
use with permanent connection to the fixed installation.
Overvoltage Category IV
Equipment of Overvoltage Category IV is for use at the origin of the installation.
Note: Examples include electricity meters and primary overcurrent protection equipment.
DM-800 • DM-810 • DM-820
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