Mirion Technologies UltraRadiac-Plus - Page 27

Chapter 4 Operational Verification Tests
• AUD and VIS indicate that the Audio
and Visual alarms are both enabled.
• The unit will start counting and
displaying the instantaneous Rate.
Naturally occurring background
radiation will cause the unit to display a
low reading
1
.
• To switch to the Dose Mode, press the
DOSE key.
• Press the RATE key to return to the
Rate Mode.
• The rate units indicator
hr
Rµ
will
blink slowly to show that the Rate
Mode is active.
Note: Because the UltraRadiac automatically
adjusts its display to accommodate the
amount of data, the units (R, for
instance) may be displayed with a
prefix. For instance, at natural
background levels, you’ll see µR,
microroentgens.
1
Naturally occurring background radiation typically
measures less than 20 mR/h or 0.20 mSv/h.
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