Model 948A-5

Remote alarms are available for area and process monitors to provide a visual/audible indication of a high alarm state. Remote alarm units are also available with an analog meter scale that indicate in the range of 0 to 107 CPM or various mR/h ranges. Remote alarms for process and area monitors are driven by the associated ratemeter or Model 960 Local Control Unit, which provides both the analog signal (for the meter) and the alarm signal (for the visual and the audible indication). For ion chamber area monitors, the remote alarm can be electrically driven by the digital preamplifier. The remote alarm/indicator is an optional component of the Model 945A Area Monitoring System. A typical area monitoring system consists of the following instruments: a Model 977 Series Wide Range Ion Chamber Detector, a Model 946A Universal Digital Ratemeter and a Model 948A-5 Remote Alarm/Indicator. The remote alarm/indicator has a horn, light and analog meter mounted on the front panel. The indicator continuously indicates the level of radioactivity measured at the detector site. The scale is calibrated from 0.1 to 107 mR/h. The horn and light actuate when the radiation level at the detector site exceeds the high alarm set point of the ratemeter. The Model 948A-5 Remote Alarm/Indicator also contains two terminal blocks for field wiring connections.