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3 Performing measurements
(see menu "setup" / "integration time").
The P
-
9710 can only detect peak values of pulses that are longer than the
settling time of the input current amplifier
-
see “
2.5 Description of the meas-
urement ranges”
„I“
measures and calculates the result (luminious intensity, radiant intensity)
regarding the distance between the light source and the detector. The meas-
urement distance (for result calculation) can be adjusted with „Setup / Meas.
Distance".
„I
-
Effective (SC)“
measures single pulses and calculates the result according
to the "Schmidt
-
Clausen" formula. Pressing the <run/stop> key starts the
measurement. The measurement time can be adjusted with "Setup \ Pulse
Meas. Time". The time constant C (for result calculation) can be adjusted with
„Setup / IF Time Constant". The measurement distance (for result calculation)
can be adjusted with „Setup / Meas. Distance".
„I
-
Effective (BR)“
measures single pulses and calculates the result according
to the "Blondel
-
Rey" formula. Pressing the <run/stop> key starts the measure-
ment. The measurement time can be adjusted with "Setup \ Pulse Meas.
Time". The pulse length (for result calculation) can be adjusted with „Setup / IF
Pulse Length". The measurement distance (for result calculation) can be ad-
justed with „Setup / Meas. Distance".
„Pulse Energy“
measures single pulses and calculates the total energy over
the adjusted measurement time. Pressing the <run/stop> key starts the meas-
urement. The measurement time can be adjusted with "Setup \ Pulse Meas.
Time".
For modes "I
-
Effective (SC)" "I
-
Effective (BR)", and "Pulse Energy" the influ-
ence of ambient light can be reduced with „Setup / Pulse Offset“. If "Static" is
selected an offset value can be set in "Offset” menu. If "Continuous" is select-
ed, the last CW measurement before the pulse measurement is started will be
used as offset value.
If "Auto Range" is set, the P
-
9710 will display "OVL" (overload) or
"UDL" (underload) if the range of the last pulse measurement was not optimal.
On next measurement(s) the range is automatically switched one step in the
suitable direction until the optimum range is locked
-
in.
„Relative (%)“
displays the measurement result in percent of the reference
value,
„Relative (Fact.)“
as factor to the reference value and
„Relative
(Log)“
as dB in relation to the reference value. To adjust the reference value
