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
at
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: 1.9" (48mm)
Clamping diameter: 1.9" (48mm)
Screen:
LCD display unit
Blue backlighting
Dimension: 1.6 x 1.9" (41 x 48mm)
Dimension:
10.7 x 3.6 x 1.6" (272 x 92 x 41mm)
Weight:
1.32 lbs (600g) with the batteries
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