A general purpose scaler‐timer suitable for radioactivity counting utilising Geiger‐Muller tubes; and as a general purpose millisecond digital timing device with manual or electronic triggering
The bright L
E
D
has six digits, 24mm high, making it suitable for individual use or for class demonstrations
In the radioactivity mode there is an adjustable 300 to 500V E
H
T
supply for G
M
tubes
Loudspeaker sockets are also provided for use when an audible indication of count rate is required
In the radioactivity mode, the display features 'most significant figure' blanking
In the timing mode, the display reads in seconds, i
e
from 0 up to 999.999s, and increments in ms
This provides a clean, unambiguous display
Timing can be actuated manually or by light operated or mechanical switches and also incorporates triggered timing
Supplies of 2V and 6V a
c
at 0.5A are provided via front panel sockets for optical switch light sources, etc
Display: Six‐digit 24mm bright L
Timing Oscillator: 1000Hz (1ms period) �0.5%, typically �0.2%
Reset: push button
Radioactivity Inputs: GM tube via BNC socket with integral 300‐500V
