Doc. # 5016
BM-185D/285D/286D
Rev. A
Operation and Service Manual
6.0
TROUBLESHOOTING
6.1 DIAGNOSTIC TOOLS
There are several diagnostic tools available to help isolate problems in the unit. Access to the
diagnostics is available only to level 0 users with a valid password. The system administrator
normally controls the password access. Press Setup Waste Streams from the operating screen to
access the Waste Streams Menu. From the Waste Streams Menu, select the desired Waste
Stream. From that screen the following diagnostics may be selected:
6.1.1 Variance
Tests the statistics of the detector counts versus a Gaussian distribution. If periodic noise is being
counted the results of the variance test will approach 1.0. Light leaks will result in a variance
near 2.0. Refer to section 3.4.4 for details on the variance test.
6.1.2 Efficiency Check
Performs an efficiency calibration on the six plastic scintillation detectors. The results are only
displayed and are not written to disk.
Both the Variance and Efficiency are unique to each individual waste stream. Setting the
discriminators for one waste stream does not affect the discriminator settings for any other waste
stream. This gives the user the ability to fine tune each waste stream for optimal Variance and
Efficiency.
PAGE 47
