LUDLUM 193 MicroR Survey Meter (0 ~ 5 µR/hr - 0 ~ 5000 µR/hr)
Application: Low-level (microR) gamma survey
Compatible Detectors: Scintillation
Linearity: Reading within 10% of true value
Meter Scale: 0 to 5 µR/hr provides an overall range of 0 to 5000 µR/hr (other meter scales available)
Meter: 1 mA, 6.4 cm (2.5 in.) scale, pivot-and-jewel suspension
Alarm: The alarm is adjustable from 10% of full meter scale to greater than full meter scale. An alarm is manifested by an alarm lamp on the front panel and an audio signal.
Detector Failure: Indicated by a rapid audible beep and meter reading of zero, instrument waits for 8 s after initial power-up sequence before giving indication to a detector failure (no count) condition
Front-Panel Potentiometers: Located under a removable front panel (not shown): alarm set, discriminator, HV adjustment, range calibration adjustments (x1000, x100, x10, x1)
High Voltage: Externally adjustable and variable from 200 to 1500 Vdc
Audio Output: Built-in unimorph speaker, audible click-per-deviation; beeps for every 1/8 second interval that is 2 sigma above background level, enabled or disabled by the audio ON/OFF switch, corresponds to the ALARM lamp initiation
Power: Two standard alkaline ˝D˝ cell batteries, secured in an isolated compartment
Battery Life: 600 hours
Construction: Cast and drawn aluminum with beige powder coat and silk-screened nomenclature
Size (H x W x L): 16.5 x 8.9 x 21.6 cm (6.5 x 3.5 x 8.5 in.) including instrument handle
Weight: 1.6 kg (3.5 lbs.), including batteries
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