7
Storage
temperature &
humidity
-20
℃～
60
℃；
below 70%rh
Overload
Protection
Measuring earth ground resistance: between each
interfaces of
H-E
、
S-FR
,
AC 280V/3 seconds
Insulation
Resistance
Over 20M
Ω
(between circuit and enclosure it is 500V)
Withstanding
Voltage
AC 3700V/rms (Between circuit and enclosure)
Electromagnetic
Features
IEC61326(EMC)
Protection Type
IEC61010-1 (CAT III 300V, CAT IV 150V, Pollution
Degree 2);
IEC61010-031;
IEC61557-1 (grounding resistance);
IEC61557-5 (soil resistivity);
JJG 366-2004
V
．
Tester Structure
1.
LCD
2.
C(H
)
interface: Current electrode
3.
P(S)
interface: Voltage electrode
4.
ES
interface: Auxiliary earth electrode
