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For air delivery, the detector should be placed in a sealed container to ensure gradual changes in pressure, which otherwise may cause irreparable damage to the GM tube. ROTEM Industries Ltd. reserves the right to change specifications without advance notice. Page 3...
10 preset threshold values. When the meter is turned off, the last threshold value is kept in memory. The RAM SURF meter can be placed in a holder. The detector surface is covered with a cap for protection against mechanical damage.
0 to 1 cps 0 to 50 cpm Sensitivity (Cs-137) Approx. 5.8 cps/Sv/h (58 cps/mR/h) Approx. 350 cpm/Sv/h (3500 cpm/mR/h) Count rate range 0 to 42,000 cps 0 to 999,000 cpm 15% of reading Accuracy Page 7 RAM SURF Operating Manual...
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0.15 0.04 1700 I () 7.56 I () 4600 Th () 5400 Am () * Minimum Detectable Level calculations are based on background reading of 1 cps, and the confidence level is 99%. RAM SURF / Operating Manual Page 8...
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Tc () 580+2280 1446 21.7 1.57 0.06 Y() 0.27 Cl () 1160 6.42 0.21 Pb () * Minimum Detectable Level calculations are based on background reading of 50 cpm, and the confidence level is 99%. Page 9 RAM SURF Operating Manual...
If the reading exceeds threshold value and then decreases below 75% of threshold value, the ALr. LCDs and the beep sound are automatically cancelled, even though the SPEAKER push-button has not been pressed. Page 11 RAM SURF Operating Manual...
Displays / advances threshold RESET Long press Out of threshold mode saving new threshold RESET Short press Out of threshold mode resuming old threshold RESET& Measuring units selection (refer to section 5) SPEAKER RAM SURF / Operating Manual Page 12...
Figure 5-1. RAM SURF Battery Compartment 4.2. External Power Supply The RAM SURF equipped with an external dc input. It can be operated either with a 9V battery or an external 9V DC power supply. The battery can be used in conjunction with the external power supply.
5.1. Calibration with a Contamination Source Calibration should be performed by an authorized technician. 5.1.1. To calibrate the RAM SURF meter, use U9 dip-switch on the CPU board. 5.1.2. Expose the detector to a Beta source to calibrate the meter to contamination measurement (cps or cpm) ( Tc source whose activity is 50 to 250 Kdpm).
U22 - CPM-uSv/h (not in use in this meter) Each press on the SPK push button will move from one to other measuring unit. To save the new measuring unit Press on the LIGHT& SPK for 10 second again. Page 15 RAM SURF Operating Manual...
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