User guide

6 Fluke Corporation 1740 Series Three-Phase Power Quality Loggers Memobox
Logger
Power supply
Functional Range 88 V to 660 V absolute, 50 Hz/60 Hz
100 V to 350 V dc
Internal fuse: 630 mA T
Power consumption 5 Watts
Ride through Fluke 1745: Internal battery for typ. > 5 hours ride through with intelligent power
management
Fluke 1743/44: 3 sec Capacitor
Fuse Power supply fuse can be replaced in service facility only. Supply can be connected in
parallel to measuring inputs (up to 660 V)
Display, indicators LEDs for status and voltage levels
Fluke 1745: LC-display with backlight for voltage, current, active power, phase sequence.
Memory Capacity 8 MB Flash-EPROM
Intervals A function > 12,000 intervals for > 85 days with 10 min intervals
P function > 30,000 intervals for > 212 days with 10 min intervals
Events > 13,000
Memory model Linear or circular
Interface USB and RS 232, 9600 to 115,000 Baud, automatic Baud rate selection, 3-wire
communication
Dimensions Fluke 1745: 282 mm x 216 mm x 74 mm (115 in x 88 in x 33 in)
Fluke 1743/44: 170 mm x 125 mm x 55 mm (69 in x 51 in x 22 in)
Weight Fluke 1745: approx. 3 kg (6.5lb)
Fluke 1743/44: approx. 2 kg (435 lb)
Measurement
A/D converter 16 bit, sample rate: 10.24 kHz
Anti-aliasing filter FIR-Filter, f
C
= 4.9 kHz
Frequency response Uncertainty < 1 % of Vm for 40 Hz to 2500 Hz
Interval length 1, 3, 5, 10, 30 s, 1, 5, 10, 15, 60 minutes
Averaging time for Min/max values ½, 1 mains period, 200 ms, 1 , 3 , 5 s
Time base Resolution: 10 ms (at 50 Hz), deviation: 2 s/day at 23 °C ± 2 °C (74 °F ± 2 °F)