This instrument incorporates independent adjustable alarms for the ratemeter and scaler operating modes. Audible alarms may be silenced (acknowledged) by depressing the RESET switch. The scaler count time, alarm values, and backlight on time are pre-programed values. This instrument can be programmed via its RS-232 port, which can also be used to output its readings at two-second intervals.
NCRP Report #151 redefines the need to evaluate not only new Linac installations but also equipment that has been upgraded for higher energies and broader capabilities, like IMRT and rotational beam systems, which may be beyond what original shielding designs had recommended.