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Fluke 85RF Probe under test
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Required Equipment List
The following equipment (or equivalent) is required for
testing the performance of the 85RF II:
Equipment Type
Recommended Model
AC Calibrator
Fluke 5520A-SC600
50-Ohm Feed Thru
Termination
JFW Industries P/N 50L-001
BNC Jack to Banana
Plug Adapter
Pomona P/N 1269
BNC to Probe Adapter
Fluke P/N 574756
Digital Multimeter,
3-1/2 Digit (DMM)
Fluke 87V
BNC Jack to Jack
Adapter
Pomona 3283
gsk002.eps
Figure 2.
Equipment Configuration for Performance Test
2. The DMM will read between 0.950 V dc and 1.050 V dc. If
the Probe is functional but is not in these limits,
disassemble the Probe (refer to the “Probe Disassembly”
Section in this Instruction Sheet) and adjust R2 for a DMM
measurement
between 0.990 V dc and 1.010 V dc.
Reassemble the Probe.
3. Move the unit in test to the Normal output of the calibrator
and decrease the output level to 0.250 V rms and 1 MHz.
The DMM will read between 0.223 V dc and 0.280 V dc.
4. Set the AC Calibrator to
STDBY
, decrease the frequency
to 100 kHz and increase the voltage to 30 V ac rms. (Do
not increase the voltage to more than 30 V ac.)
5. Set the AC Calibrator switch to
OPER
. The DMM will read
between 28.3 V dc and 31.8 V dc.
6. Move the unit in test back to the scope output and set the
level sine to 1 V rms 160 MHz. The DMM will read
between 0.9 V dc and 1.12 V dc. Increase the frequency
to 450 MHz. The DMM will read between 0.562 V dc and
1.780 V dc.