Promax OD-603 Manual page 25

To adjust the probe attenuation.
►
For correct measurements, the attenuation coefficient settings in the
operating menu of the Channel should always match what is on the probe
(see "How to Set the Probe Attenuation Coefficient"). If the attenuation
coefficient of the probe is 1:1, the menu setting of the input channel should
be set to X1.
Take the Channel 1 as an example, the attenuation coefficient of the probe
is 10:1, the operation steps is shown as follows:
Press the CH1 MENU button to show CH1 SETUP menu.
In the SETUP menu, press the H3 button, the Probe menu will display
at the right of the screen, then press the F1 button and with the knob
select X10 for the probe.
The Figure 16 illustrates the setting and the vertical scale factor when the
probe of the attenuation coefficient of 10:1 is used.
A list of the probe attenuation coefficient and the corresponding menu settings:
Attenuation Coefficient of
1000:1
20
Page
Figure 16. Regulation of the Attenuation Ratio of the Probe.
the Probe
1:1
10:1
100:1
Corresponding Menu
Setting
X1
X10
X100
X1000
June 2016