Testing The Fuses - Fluke 175 Calibration Information Manual

175, 177, & 179
Calibration Information
Input Range
1, 2
Volts AC 600 mV
6 V
60 V
600 V
1000 V
Volts DC 6 V
60 V
600 V
1000 V
AC/DC Amps mA
A
1. Maximum input for specified accuracy = 10 x Range or 1000 V.
2. Noise at low frequency and amplitude may exceed the frequency accuracy specification.
3. Unspecified but usable depending on quality and amplitude of signal.
4. In mA and A ranges, frequency measurement is specified to 30 kHz.

Testing the Fuses

To avoid electrical shock or personal injury:
•
Remove the test leads and any input signals before replacing the battery or
fuses.
•
To avoid electrical shock, arc blast, or damage to the Meter, install only
fuses with the amperage, interrupt, and voltage, and speed ratings specified
in Table 5.
To test the fuses (refer to Figure 1):
1. Set the rotary switch to e.
2. Plug a test lead into the VeG terminal and touch the probe to the
or 10 A terminal (to test the 11 A fuse).
•
If the display shows a resistance value in the range shown in Figure 1, the fuse is good.
•
If the display reads
•
If the display shows any other value have the Meter serviced. See "Service Information" earlier in
this manual.
6
Frequency Counter Sensitivity
45 Hz to
2 Hz to 45 Hz 10 kHz
Unspecified 80 mV
3
0.5 V 0.6 V
5 V 3.8 V
50 V 36 V
500 300 V
0.5 V 0.75 V
4 V 3.8 V
40 V 36 V
500 V 300 V
5 mA 4 mA
0.5 A 0.4 A
WWarning
OL , replace the fuse and test again.
Typical Sensitivity (RMS Sine Wave)
10 kHz to
20 kHz
150 mV
1.0 V
4.1 V
39 V
320 V
1.4 V
4.3 V
39 V
320 V
4 mA
0.4 A
20 kHz to
50 kHz
400 mV Unspecified
2.8 V Unspecified
5.6 V 9.6 V
45 V 58 V
380 V NA
4.0 V Unspecified
6.6 V 13 V
45 V 58 V
380 V NA
4 mA NA
4
0.4 A NA
4
(to test the 440 mA fuse)
400 mA
50 kHz to
100 kHz
3
3
3