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1. INTRODUCTION
The ELECTRA is a portable ratemeter for use with a variety of GM and Scintillation probes for
the measurement of Radioactive Contamination and Radiation.
The SELECTRA is a portable ratemeter derived from the ELECTRA, dedicated for use with
the Thermo Electron range of ‘intelligent’ GM and Scintillation ‘I’ series probes for the
measurement of Radioactive Contamination and Radiation.
Upon connection of a suitable ‘I’ series probe, the SELECTRA will interrogate the probe’s on-
board memory store containing the probe’s operating parameters and overwrite the
SELECTRA SET UP parameters with these values/options. This enables the SELECTRA-
probe combination to commence monitoring immediately without the need to reset the SET UP
parameters for the probe required.
The SELECTRA has been designed to provide accuracy in the lower level discriminator and
high voltage settings. This accuracy enhances consistency between the performance of
SELECTRA (and ELECTRA) units. This consistency implies that ‘I’ series probes can be
interchanged between any number of SELECTRA units without variation in probe
performance.
1.1 GETTING STARTED: QUICK OPERATION GUIDE
The following is a brief guide only; full details of operational modes can be found in section 4.
1.1.1 Switch - on
press
⇒
Ratemeter
Mode
1.1.2 Rate → Integrate
press
⇒
Integrate Mode
To see elapsed time:
press
⇒
10 s
(This feature toggles with the integrate count).
To stop integration:
press
⇒
Final Result
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