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<br />Chapter 2. Specifications <br />0.0025 IPS to 1.2 IPS (0.063 to 30.5 MMPS) <br />0.005 IPS to 2.5 IPS (0.125 to 64 MMPS) <br />Acoustic Ranges 0.02 to 2.56 millibars (100 to 142 dB) <br /> 0.04 to 5.12 millibars (106 to 148 dB). <br />Trigger Levels Seismic <br />2.5 IPS Range - 0.01 to 0.57 IPS (0.25 to 14.5 MMPS). <br /> 5.0 IPS Range - 0.02 to 1.14 IPS (0.5 to 29 MMPS). <br /> 10.0 IPS Range - 0.04 to 2.28 IPS (1.0 to 58 MMPS). <br /> Seismic trigger sensitivities are proportionally modified by optional <br /> gains. <br /> Acoustic - 106 to 142 dB or 112 to 148 dB. <br />Manual Trigger Allows triggering from the keyboard or by an external input. One unit <br /> may be used to trigger additional instruments. <br />Record Duration Mini-Seis: From 1 to 6 seconds at a sample rate of 2048 samples <br /> per second. At lower sample rates, the duration is automatically <br /> increased proportional to the amount of decrease in the sample <br /> rate. <br /> Mini-Seis II: From 1 to 9 seconds at 1024 samples per second. <br />Cycle Time Mini-Seis: At 1024 samples per second, up to 12 seconds of data <br /> can be taken with only 50 milliseconds between events. After 12 <br /> seconds of data are stored, another event cannot be taken until the <br /> previous data have been processed. Processing requires about 3 <br /> seconds per second of recording time. <br /> Mini-Seis II: Maximum continuous data time is 9 seconds. <br />Records Stored Up to 341 typical coal mine or quarry blast events. <br />Calibration Test (Seismic) A dynamic transducer test is performed automatically after each <br />event or manually on command. The test is stored in the <br />summarized data and may be downloaded as an event. <br />Calibration Test (Acoustic) An electronic test of the microphone is performed with the seismic <br />test and is stored in memory along with the seismic test. <br />84 Hour Cal Test In a remote installation, an automatic calibration test occurs if no <br />event has been recorded for 84 hours. <br />RS232 Serial Port Data can be downloaded and setup commands can be uploaded <br />directly by computer or remotely by modem. <br />Baud Rate From 1200 to 38.41K.