Fluke 45 - Page 22

45
Service Manual
1-10
Maximum Input
mA 300 mA dc or ac rms. Protected with a 500 mA, 250 V, IEC 127-sheet I,
fastblow fuse and a 440 mA, 1000 V, fast blow fuse.
A 10 A dc ac rms continuous, or 20 A dc or ac rms for 30 seconds maximum.
protected with a 11 A, 1000 V, 17,000 A interrupt rating, fast blow fuse.
Note
Resistance between the COM binding post and the meter’s internal
measuring circuits is approximately .003
Ω
AC Current
Resolution
Range
Slow Medium Fast
Burden Voltage*
10 mA 100 µA - - 0.14 V
30 mA - 1 µA 10 µA 0.45 V
100 mA 1 µA 10 µA 100 µA 1.4 V
10 A 100 µA 1 mA 10 mA 0.25 V
* Typical at full range
Accuracy
Accuracy
Range Frequency
Slow Medium Fast
mA (To 100 mA) 20-50 Hz 2% + 100 2% + 10 7% + 2
mA (To 100 mA) 50 Hz - 10 kHz 0.5% + 100 0.5% + 10 0.8% + 2
mA (To 100 mA) 10 - 20 kHz 2% + 200 2% + 20 2% + 3
A (1-10 A) 20 - 50 Hz 2% + 100 2% + 10 7% + 2
A (1 - 10 A) 50 Hz - 2 kHz 1% + 100 1% + 10 1.3% + 2
A (0.5 to 1 A) 20 - 50 Hz 2% + 300 2% + 30 7% + 4
A (0.5 to 1 A) 50 Hz - 2 kHz 1% + 300 1% + 30 1.3% + 4
mA accuracy specifications apply within the following limits, based on reading rate:
Slow Reading Rate: Between 15,000 and 99,999 counts (full range)
Medium Reading Rate: Between 1,500 and 30,000 counts (full range)
Fast Reading Rate: Between 150 and 3,000 counts (full range)