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35040
Operators Manual
3-18
Figure 3-28. The Measurement Screen With the
Charge and Current Limits Exceeded After the First
60 Seconds
Figure 3-29. The Measurement Overrange Screen
Table 3-1 specifies the conditions that cause the Model 35040 Therapy Dosimeter to display the
overrange indicator for a measurement.
Table 3-1. Overrange Conditions
Condition Values Overranged
charge > 2.4 μC
charge, accumulated charge, dose, accumulated dose, average
current, average dose rate, effective exposure time
accumulated charge > 1.0000 C accumulated charge, accumulated dose
current > 100.0 nA all except leakage
time > 59 min 59 s effective exposure time
3.9.14 Reset Error
Pressing the RESET /MEASURE button while on the Measurement Screen causes the Model 35040
Therapy Dosimeter to reset the electrometer, zero all readings, and restart the measurement process. If
an exposure starts during the reset operation, the instrument displays the reset error message (see
Figure 3-30).
Figure 3-30. The Measurement Screen Showing a Reset Error
To remove the error condition, end the exposure, and press the RESET/MEASURE button. Wait a few
seconds and repeat the exposure.
OVER nC
OVER min OVER s
OVER pA
ADC
Current Overrange
Press RESET/MEASURE
Reduce exposure and
ADC
and Repeat Exposure
Press RESET/MEASURE
ADC
Internal Reset Error