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Fluke 78 - Controls: Rotary Switch and Pushbutton

Fluke 78
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78
Service Manual
1-6
Table 1-1. Specifications (cont)
Function Range Resolution Accuracy Burden Voltage
(Typical)
AC Volts* 4.000 V 0.001 V ± (2.5%+2)
(45 Hz to 1 kHz) 40.00 V 0.01 V ± (2.5%+2) N/A
300.0 V 0.1 V ± (2.5%+2)
300 V 1 V ± (2.5%+2)
To 20 kHz -- -- ± 1.5 dB typical
DC Volts* 400.0 mV 0.1 mV ± (0.3%+5)
4000 mV 1 mV ± (0.3%+1)
4.000 V 0.001 V ± (0.3%+1)
40.00 V 0.01 V ± (0.3%+1) N/A
300.0 V 0.1 V ± (0.3%+1)
300 V 1 V ± (0.3%+1)
Resistance 400.0
J
0.1
J
± (0.5%+2) N/A
4.000 k
J
0.001
J
± (0.5%+1)
40.00 k
J
00.01 k
J
± (0.5%+1)
400.0 k
J
000.1 k
J
± (0.5%+1)
4.000 M
J
0.001 M
J
± (0.5%+1)
40.00 M
J
0.01 M
J
± (1%+3)
Continuity 400.0
J
0.1
J
Beeper on @
<30
J
for
short of
1 ms or longer
Open circuit voltage
< 1.5 V
Diode Test 2.500 V 0.001 V ± 2% typical Open circuit voltage
< 3.3 V
AC Current
(45 Hz to 1 kHz)
10.00 A** 0.01 A ± (2.5%+2) 0.03 V/A
DC Current 4.000 A
10.00 A**
0.001 A
0.01 A
± (1.0%+5)
± (1.0%+2)
0.03 V/A
0.03 V/A
* Input impedance: 10 M
J
(nominal), < 150 pF.
** 10 A continuous, 20 A overload for 30 seconds maximum.
Function Range Resolution Accuracy
Frequency 99.99 0.01 Hz ± 0.01%+2)
(1 Hz to 20 kHz) 999.9 0.1 Hz ± (0.01%+2)
9.999 kHz 0.001 kHz ± (0.01%+2)
20.00 kHz 0.01 kHz ± (0.01%+2)
(10
7
V-Hz maximum) >20.00 kHz to 99.99 kHz 0.01 kHz Usable
500.0 kHz 0.1 kHz Usable
RPM 1 70-7,000 RPM (usable to 9,999) 1RPM ± (0.2% + 2)
RPM 1 120-7,000 RPM (usable to 9,999) 1RPM ± (0.2% + 2)
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
thermocouple.

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