| Intrinsic error |
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Refers to the reference conditions
and is guaranteed for two years |
| Warranty |
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2 years |
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| Recalibration interval |
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2 years recommended |
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| Quality system |
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developed, designed, and
manufactured according to DIN ISO 9001 |
| Reference conditions |
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23 °C ± 2 K; 74 °F ± 2 K , Vm=230 V
± 10%, 50 Hz ± 0.1 Hz or 60 Hz ± 0.1 Hz |
| Phase
sequence: |
L1, L2, L3 |
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| Interval
length: |
10 minutes |
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| Wye
connection: |
(L1, L2, L3 to N) |
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| Power supply: |
88 V ... 265 V AC |
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| Environment conditions |
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| Working
temp. range: |
-10 °C to 55°C; 14 °F to 131°F |
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| Operating
temp. range: |
0 °C to 35°C; 32 °F to 95°F |
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| Storage
temp. range: |
-20 °C to 60°C; -4 °F to 140°F |
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| Reference
temp. range: |
23 °C ± 2 K; 74 °F ± 2 K |
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| Relative
humidity: |
Fluke 1745: Class B2 acc. IEC
60654-1 |
| Fluke
1744/43: Class C2 acc. IEC 60654-1 |
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| Housing |
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robust, fully insulated housing and
accessories |
| Protection type |
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| Fluke 1745: |
IP50 as per EN 60529 |
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| Fluke
1744/1743: |
IP65 as per EN 60529 |
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| Safety |
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IEC/EN 61010-1 600 V CAT III, 300 V
CAT IV, pollution degree 2, double insulation |
| Type test voltage |
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5.2 kV rms, 50 Hz / 60 Hz, 5 s |
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| EMC |
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| Emission: |
IEC/EN 61326-1, EN55022 |
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| Immunity: |
IEC/EN 61326-1 |
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| Voltage and
Current Measurement |
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| Input voltage |
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| Input range
VI P-N: |
max 480 V AC |
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| Input range
VI P-P: |
max 830 V AC |
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| Max. overload voltage: |
1.2 VI |
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| Input
range selection: |
By job programming |
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| Connections: |
P-P or P-N, 1- or 3-phase |
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| Nominal
voltage VN: |
<= 999 kV with PTs and ratio |
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| Input
resistance: |
App. 820 kΩ per chan. Lx-N Single
phase (L1 or A, L2 or B, L3 or C connected): app. 300 kΩ |
| Intrinsic
uncenrtainty: |
0.1 % of VI |
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| Voltage
transformer: |
Ratio: <999 kV / VI |
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| Ration
selection: |
By job programming |
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| Current
input with Flexi Set |
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| Input ranges II L1 or
A, L2 or B, L3 or C, N: |
15 A / 150 A / 1500 A / 3000 A ac |
| Measuring
range: |
0.75 A … 3000 A ac |
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| Intrinsic
uncertainty: |
< 2 % of II |
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| Position
influence: |
Max. ± 2 % of measured value – for
distance conductor to meas. head > 30 mm |
| Stray
field influence: |
<> 200 mm |
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| Temperature
coefficient: |
< 0.05 % / K |
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| Current
transformer: |
Ratio <= 999 kA / II |
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| Ratio
selection: |
By job programming |
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| Connection: |
3-phase, 3-phase +N, 2 phase L1 or A
and L3 or C (2 W-meter-method) 7 pole connector |
| Current input for clamp |
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| Input ranges II L1 or A, |
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| L2 or B,
L3 or C, N: |
0.5 V nominal (for II) 1.4 Vpeak |
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| Intrinsic
uncertainty: |
< 0.3 % of II |
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| Max.
overload: |
10 V ac |
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| Input
resistance: |
App. 8.2 kΩ |
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| Current
transformer: |
Ratio Ω 999 kA / II |
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| Power systems |
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Delta, 2-Element Delta, Wye, Single
Phase, Split Single Phase |
| Logger |
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| Power supply |
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| Functional
Range: |
88 V to 660 V absolute, 50 Hz / 60
Hz |
| 100 V to
350 V dc Internal fuse: 630 mA T |
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| Power
consumption: |
5 Watts |
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| Ride
through: |
Fluke 1745: Internal battery for
typ. > 5 hours ride through with intelligent power management |
| Fluke
1743/44: 3 sec Capacitor |
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| 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 |
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LEDs for status and voltage levels |
| Fluke 1745:
LC-display with backlight for voltage, current, active power, phase sequence. |
| Memory |
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Capacity 8 MB Flash-EPROM |
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| Intervals: |
A function > 12000 intervals for
> 85 days with 10 min intervals |
| P function
> 30000 intervals for > 212 days with 10 min intervals |
| Events: |
> 13000 |
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| Memory
model: |
linear, circular |
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| Interface |
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RS 232, 9600...115 000 Baud,
automatic Baud rate selection, 3-wire communication |
| Dimensions |
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| Fluke 1745: |
282 mm x 216 mm x 74 mm (115in x
88in x 33in) |
| Fluke
1743/1744: |
170 mm x 125 mm x 55 mm (69in x 51in
x 22in) |
| Weight |
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| Fluke 1745: |
approx. 3 kg |
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| Fluke
1744/1743: |
approx. 2 kg |
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| Measurement |
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| A/D
converter: |
16 bit, sample rate: 10.24 kHz |
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| Anti-aliasing
filter: |
FIR-Filter, fc =4.9 kHz |
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| 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: 2s/day at 23 °C; 74 °F ± 2 K |
