Models 375 (Including Series One), 375/1, 375/2 & 375/4 Section 3
Ludlum Measurements, Inc. Page 3-1 May 2017
Specifications
Compatible Detectors: GM, proportional, and scintillation
Display: four-digit LED display with 2 cm (0.8 in.) character height
Display Range: 000.0-9999 (Series One: 00.00-9999)
Display Units: can be made to display in µR/hr, mR/hr, R/hr, µSv/h,
mSv/h, Sv/h, µrem/hr, mrem/hr, rem/hr, cpm, cps, and others
Linearity: readings within 10% of true value with detector connected
Operating Range: depends upon the type of detector used. The
operating range of the 375/2 is from 1 µSv/h to 10 mSv/h (0.1 mR/hr
to 1 R/hr). The operating range of the 375/4 is from 0.01 mSv/h to 100
mSv/h (1 mR/hr to 10 R/hr). External detectors will have different
operating ranges.
Response: typically 3 seconds from 10% to 90% of final reading
Status (green light): indicates the instrument is functioning properly
Low Alarm: indicated by a yellow light and slow beep (1 per second)
audible tone (can be set at any point from 0.0-9999 {00.00-9999 for
Series One})
High Alarm: indicated by a red light and a fast beep (4 per second)
audible tone (can be set at any point from 0.0-9999 {00.00-9999 for
Series One})
Note:
Audible indicators can be configured as a single beep by
dipswitch if desired. Audio intensity is controlled by rotating
the baffle on the audio device. Audio intensity may also be
adjusted by moving an internal connector.
Sectio
3
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