46
4.2.22 Indication of Phase Order
Frequency range
47 to 400Hz
Acceptable voltage range
50 to 1000V
Acquisition duration period
≤
500ms
Validity duration period
approximately 10s at 50Hz
approximately 2s to 400Hz
Acquisition duration measurement period
and phase order display
≤
500ms
Acceptable phase unbalance
±
10
Acceptable amplitude unbalance
20%
Acceptable level of harmonics in voltage
10%
4.3 ENVIRONMENTAL CONDITIONS
Conditions
Operating
Storage
Temperature
-4° to +131°F
(-20° to +55°C)
-40° to +158°F
(-40° to +70°C)
Relative humidity (RH):
≤9
0% up to 131°F (55°C)
≤90% up to 158°F (70°C)
4.4 MECHANICAL SPECIFICATIONS
Housing:
Rigid polycarbonate shell with over-molded elastomer
covering;
UL94 V1
Jaws:
Polycarbonate
Opening: 1.3" (34mm)
Clamping diameter: 1.3" (34mm)
Screen:
LCD display unit
Blue backlighting
Dimension: 1.1 x 1.7" (28 x 43.5mm)
Dimension:
8.7 x 3.0 x 1.65" (222 x 78 x 42mm)
Weight:
0.86 lbs (340g) with the batteries
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