User Maintenance Routines; Cleaning - PeakTech 2020 GN Operation Manual

6. If the risetime is slow compared to the period, no further control manipulations are necessary. If the
risetime is fast (leading edge almost vertical), to set x10 MAG to the X10 MAG position and
reposition the trace as in Step 5 (See Figure 2-10 b).
7. Count the number of horizontal divisions between the central vertical line (10 % point) and the
intersection of the trace with the 90 % line.
8. Multiply the number of divisions counted in step 7 by the setting of the TIME/DIV switch to find the
measured risetime. If 10 x magnification was used, divide the TIME/DIV setting by 10. For example,
if the timebase setting in Figure 2-10 was 1 s/div (1000 ns), the risetime would be 360 nanoseconds
(1000 ns ÷ 10 = 100 ns, 100 ns x 3.6 div = 360 ns)
9. To measure falltime, simply shift the trace horizontally until a trailing edge passes through the 10 %
and central vertical gratitude lines, and repeat Steps 7 and 8.
10. When measuring the rise and fall time, note that 17.5 ns-Rise time (tr) = 0.35/f-3dB which is
transition time is contained in the PeakTech 2020 GN oneself. Therefore the real transition time (tc)
is composed of measure transistion time (tm) and tr. The above all is explained with the following
formula:
tc = √ tm² - tr²
a) Basic Display Setup
3.

User Maintenance Routines

Maintenance routines performable by the PeakTech 2020 GN/PeakTech 2030 KT operator are listed in this
section. More advanced routines (i. e. procedures involving repairs or adjustments within the instrument)
should be referred to qualified service personnel.
3.1

Cleaning

If the outside of the case becomes dirty or stained, carefully wipe the soiled surface with a rag moistened
with detergent, then wipe the cleaned surface with a dry cloth. In case of severe stain, try a rag moistened
with alcohol.
Do not use powerful hydrocarbons such as benzene or paint thinner.
tc = Real transition time
tm = Measured transition time
tr = Rise time of oscilloscope
Figure 2-12: Risetime Measurement
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b) With horizontal Magnification