Fluke 78 - Page 61

Specifications
49
Function Range Resolution Accuracy
Frequency
(1 Hz to 20 kHz)
(10
7
V-Hz maximum)
99.9
999.9
9.999
20.00 kHz
>20.00 kHz to 99.99 kHz
500.0 kHz
0.01 Hz
0.1 Hz
0.001 kHz
0.01 kHz
0.01 kHz
0.1 kHz
±(0.01% + 2)
±(0.01% + 2)
±(0.01% + 2)
±(0.01% + 2)
Usable
Usable
RPM1
RPM2
60 - 7,000 RPM (useable to 9.999)
120 - 7,000 RPM (useable to
9,999)
1 RPM
1 RPM
±(0.2% + 2) RPM
±(0.2% + 2) RPM
Dwell Angle 0 - 120 1 degree ±2 degrees
Duty Cycle 0.0 - 99.9%
(1 Hz to 20 kHz, pulse width >5 µs)
0.1% ±(0.2% per kHz + 0.1%)
(for rise time <1 µs
Temperature*
-40 to +999°C @ >20°C ambient, to
+980°C below 20°C ambient
1 degree ±(0.3% + 6°C) @ -40 to -20°C
±(0.3% + 4°C) @ -20 to 0°C
±(0.3% + 3°C) @ 0 to 170°C
±(0.3% + 5°C) @ 170 to 260°C
±(0.3% + 6°C) @ 260 to 700°C
±(0.3% + 7°C) @ 700 to 999°C
* When measuring temperature, the accuracy of the system is the combined accuracy of the meter and the thermocou-
ple.
Frequency Counter Sensitivity and Trigger Level
Input Range Minimum Sensitivity (rms Sine Wave) Approximate Trigger level (DC Volts Function)
1 Hz to 5 Hz 5 Hz to 20 kHz
400.0 mV dc
4000 mV dc
4.000 V
40.00 V
300.0 V


0.7 V
7 V
70 V


03 V
3 V
30 V
400 mV
400 mV
1.7 V
4 V
40 V