The electrometer must be calibrated for each individual detector and radiation source. A special feature inherent in the 37-720 is the ability to switch between DET A and DET B, using the front panel switch, so that two detectors can be utilized for monitoring at the same time. This feature is applicable when the measurement is being taken in the dose or rate mode.
37-720 User Manual 1.2 Specifications Range cGy: 0 to 2000 cGy/min: 0 to 2000 Sensitivity .25 nC/cGy – 2 nC/cGy Calibration Adjustments Front panel screwdriver adjustments: CAL A and CAL B used for calibration of detector A and detector B.
General Information Specifications Routine Cleaning CAUTION Do not immerse the Model 37-720 Dual-Diode Dosimeter Patient Dose Monitor. The unit is not waterproof. Liquid could damage the circuits. The unit should be kept clean and free of dirt and contamination. The unit may be cleaned by wiping with a damp cloth using any commercially available cleaning or decontaminating agent.
Operation 2.1 Battery Check Model 37-720 Dual-Diode Dosimeter Patient Dose Monitor is shipped with the battery installed. Turn power on by placing the ON/OFF switch to the ON position, then look at the upper left hand corner of the display. If the battery is low, a LO BAT message will appear on the display.
37-720 User Manual NOTE If two detectors are connected, alternate readings can be taken by switching between DET A and DET B. Both detectors should be calibrated concurrently. The highest degree of calibration can be attained by calibrating at a dose or dose rate near ½ scale (1000 cGy or 1000 cGy/min).
Maintenance Battery Replacement Section 3 Maintenance 3.1 Battery Replacement If the LO BAT message appears on the display, the battery should be replaced. Turn the power off. Open the battery compartment (located on the rear panel). Pry on the rippled side to open the door and gain access to the battery.
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