CM-11 Wall Mounted Alpha/Beta Contamination Monitor

Measurement
Background is measured and stored until the proximity sensor is tripped or the probe lifted from the hanger, when monitoring starts. Background is then subtracted from the counts before they are displayed. The peak hold feature makes it easier to pinpoint spots of contamination, and their levels, by simultaneously displaying the peak and instantaneous readings.

Results are shown on a log scale ranging from 0.2 to 10 alarm levels, and on a digital display in units of countrate, total activity or specific activity. The two readout channels are normally configured for alpha and beta/gamma, but can be configured to separate 125I from beta/gamma when used with the GP13 low energy gamma probe. Versions in which the probe window faces out allow hands to be monitored before actually touching the probe.

Display Units cps, cpm, Bq*, dpm*, Bq.cm-2*, nCi* (*Probe efficiency and area are entered during setup)
Alarm Levels 0.1 to 100,000 display units
Display Channels α, β/γ, αplus β/γ, 125I plus β/γ
Monitoring Update Time 0.1 to 10 s. Background Update Time 10 to 100 s User Control Removal of probe from hanger (or triggering optional proximity sensor activates measurement cycle with back ground subtracted. Replacement of probe causes resumption of background measurements
Display CCFL backlit LCD, resolution 240 x 128 pixels. Digital, bargraph and graphic display. Timed count rate, timed disintegration rate, HV scan and plateau plot
Audible Indications Distinct tones for particle detected, alarm and fault condition
Printout Peak results, parameter settings and HV scan results
External Printer Any RS 232 serial printer
Temperature Range 5 to 40 °C, (41 to 104 °F) operational -10 to 50 °C (14 to 122 °F) during storage. Humidity Up to 95% RH
Power 85 to 264 VAC, 74 to 63 Hz, 40VA
Dimensions 240 x 380 x 160 mm approx. (9.5” x 15” x 16.5”)