Model 14C Survey Meter
Ludlum Measurements, Inc. Page 4 July 2022
The count rate scale reads 0-5K COUNTS/MINUTE (kcpm or 1000s of counts per minute) and has
BAT TEST on the dial.
If the needle is pointing as indicated below and the instrument range selection switch is on the ×0.1
scale multiple, then the reading is 3.5 kcpm (multiplied by) ×0.1 = 350 cpm.
The same needle indications on successive ranges would be:
×1 = 3.5 kcpm (or 3500 cpm)
×10 = 35 kcpm (or 35,000 cpm)
×100 = 350 kcpm (or 350,000 cpm)
A typical dual scale (two arcs) meter face is shown below. The top scale reads 0-2 mR/hr. The
bottom scale also reads 0-2 mR/hr and is for ×100 only scale. The ×100 ONLY scale will work
correctly when the multiplier switch is in the ×100 range. The meter face also has a BAT TEST
position on the dial.
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