PTW DIADOS E, Руководство пользователя

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DIADOS E
T11035
Operating Manual
– Performing a Measurement
32 D616.131.00/10 en
4.3 Charge and Current
Measurement
4.3.1 General Information
DIADOS E can also be used as an electrometer for
measurement of current or charge. This is possible
only when the unit C has been selected in the Set-
up menu.
Please note that DIADOS E will almost exclusively
measure currents and charges in the direction indi-
cated as positive. A positive direction means that
the current will flow from the amplifier. In the direc-
tion indicated as negative, currents up to only ap-
prox. -1 pA can be measured.
4.3.2 Preparing for a Measurement
Please observe the information given in chapter 2.
Connect the measuring cable to the DETECTOR
socket at the top of DIADOS E (refer to Figure 2).
The display will be similar to the one shown in Fig-
ure 15 (electrical unit in the first line, no indication of
application and filter).
Figure 15: Display in electrometer mode
Use the RANGE function to select the measuring
range LOW, MEDIUM or HIGH. Table 1 section 2.8
shows the upper range limits for the ranges Low,
Medium, and High in current measurements. The
same limits apply for charge measurements
( Table 2 section 2.8), because these are based on
current measurements.
Besides the fixed ranges, the Autorange can also
be selected with the RANGE function. The Au-
torange is indicated by AUTO L in the line indicating
the range.
Use the MODE key to select normal or pulsed
mode. In normal mode, the device will measure the
current, the charge and the time. In pulsed mode,
the device will measure the charge, the charge per
pulse and the number of pulses and the unit in the
upper line is displayed in reverse video.
Now install the detector at the measuring point.
4.3.3 Starting the Measurement
DIADOS E is permanently in the Autostart mode. A
measurement will begin as soon as a signal is de-
tected. The measurement can also be started man-
ually with the START/STOP key.