Instructions
Man_7005_1019 www.testec.de 5
Inspection Procedure
1. Connect the BNC output connector to the vertical input of the oscilloscope.
2. Power on the probe.
3. Set the attenuation setting on the oscilloscope to match the probe.
4. Connect the input of probe to a function generator. Then select a square-wave
output of 10 V amplitude and 100 kHz frequency.
5. The square-wave will be displayed on the screen of the oscilloscope. This
indicates the probe is working properly.
Note that the oscilloscope should show the same voltage and frequency as
the function generator.
Getting Started
1. Connect the BNC output connector to the vertical input of a general purposed
oscilloscope. The oscilloscope must have a ground referenced.
2. Connect power adapter.
3. Select the proper attenuation ratio. When measuring signals below 3,5 V,
switch the attenuation ratio to x1 in order to get higher resolution and less
noise ratio. For voltages up to 18 V, set the attenuation ratio to x5 and for
voltages up to 35 V set the attenuation ratio to x10.
4. The power indicator LED should turn on.
5. Plug the supplied grips onto the test leads and connect the circuit under test.
Vertical Scale on Oscilloscope
The actual vertical scale of the oscilloscope is equal to the attenuation factor
multiplied by the range of vertical scale selected on the oscilloscope.
For example, with the probe on factor x00 and the oscilloscope on 0.5 V/div, the
real vertical scale is 10 x 0.5 = 5 V/div.
With the probe on x5, the real vertical scale is 5 x 0.5 = 2,5 V/ div.
These values apply when the oscilloscope is set to the typical 1 MΩ impedance
input. When the scope is set to 50 Ω input, the actual vertical scale will be
doubled:
10 V/div for the x10 setting and 5 V/div for the x´5 setting.
Scope Input
Probe
Actual
Vertical Scale
Actual Vertical
Impedance
Attenuation
Attenuation
Reading on
Scale of the
Setting
Setting
Oscilloscope
Oscilloscope
1 MΩ
x1
x1
0,5 V/div
0,5 V/div
1 MΩ
x5
x5
0,5 V/div
2,5 V/div
1 MΩ
x10
x10
0,5 V/div
5 V/div
50 Ω
x1
x2
0,5 V/div
1 V/div
50 Ω
x5
x10
0,5 V/div
5 V/div
50 Ω
x10
x20
0,5 V/div
10 V/div