Optional Remote GPS
Tracking
GPS-L1 (1575.42 MHz)
12 channel (tracks up to 12 satellites)
Acquisition
2 minutes typical
Accuracy
UTC-USNO
±
1
µ
s (only 1 satellite with
correct position needed)
Out-of-Lock
Indication
Via system interface and status display;
optional, via contact closure.
Timebase Error
GPS locked
Less than
±
1
µ
s, when locked to at least one
satellite with correct position
Unlocked
10 ppm, typical, after being locked to
10 minutes minimum (
<
1 second/day unlocked,
typical)
IRIG-B
Less than
±
1
µ
s + accuracy of IRIG-B source
8.7
Measurement Specifications
NOTE
: Accuracy specifications include all sources of uncertainty. Except
as noted, specifications apply for the full operating range, including
temperature (-10
◦
to +50
◦
C), line voltage, input range including specified
over-range, power factor, input frequency, and drifts over a one-year
calibration interval. Specifications assume synchronization to GPS and
operation in 3-element mode or in a well-balanced system where imbalance
does not degrade accuracy.
Accuracy
Watts, Wh
0.05% of reading, for voltage 7 to 650 Vrms and
current 10 mA to 20 Arms and
P F >
0
.
2
Underrange
0.005% multiplied by (10 mA/I rms) for current
<
10 mA rms, typical
Vrms
0.05% of reading
1
or
±
5 mV, whichever is greater
Arms
0.05% of reading
1
or
±
0.1 mA, whichever is
greater
Low range
1% of reading
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