Fluke 45 - Page 25

Introduction and Specifications
Specifications
1
1-13
Frequency
5 Hz to > 1 MHz
Applicable Functions
Volts AC and Current AC
Resolution
Range
Slow & Medium Fast
Accuracy
1000 Hz .01 Hz .1 Hz .05% + 2
10 kHz .1 Hz 1 Hz .05% +1
100 kHz 1 Hz 10 Hz .05% +1
1000 kHz 10 Hz 100 Hz .05% +1
1 MHz 100 Hz 1 kHz *
* For measurement of 1 MHz and lower, accuracy is .05% + 1.
For measurement above 1 MHz, accuracy is not specified.
Sensitivity of AC Voltage
Frequency Level (Sine Wave)
5 Hz - 100 kHz 30 mV rms
100 kHz - 300 kHz 100 mV rms
300 kHz - 1 MHz 1 V rms
Above 1 MHz Not Specified
Sensitivity Level of AC Current
Frequency Input Level
5 Hz - 20 kHz 100 mA >3 mA rms
45 Hz - 2 kHz 10 A >3 A rms
Note
When the meter is set to measure frequency and there is no input signal
(i.e., the input terminals are open), the meter may read approximately 25
kHz (rather than zero). This is due to internal capacitive pickup of the
inverter power supply into the high-impedance, input circuitry. With
source impedance of < 2 k
Ω , this pickup will not affect the accuracy or
stability of the frequency reading.