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3. Precautions
Attention
3.1 Operational conditions
Item
Condition
Temperature range
-20
℃
to
＋
50
℃
Relative humidity
90% or less (No condensation)
Storage temperature
-20
℃
to +50
℃
Reset of cumulative dose
Reset through the Dosimeter Setting Device
Alarm volume
Approximately 85dB @20 cm
Battery life
Continuously 2880 hours
(Using a new battery under normal temperature
and no alarm activity)
Impact resistance
Impact from 150cm drop onto a hard wood surface
Dose threshold (default)
Alarm 0.5mSv (50 mrem)
Pre-Alarm 0.25mSv (25 mrem)
Dose rate threshold (default)
Alarm
700mSv/h (70000 mrem/h)
Pre-Alarm 70mSv/h (7000 mrem/h)
Overload indication
‘OVER’ is indicated
*1 Default of dose and dose late threshold of neutron are set to 9.999Sv and
9.999Sv/h, respectively. If these thresholds are used, please reset the
threshold properly via setting device.
3.2 Other requirements
(1) See User’s Manual “Dosimeter Setting Device” for information on parameter writing and data
reading via the device and a PC.
(2) If multiple dosimeters are used, dosimeter rack (*Option) is recommended. See Outline
Drawing “Dosimeter Rack” for information on the rack for storage dosimeters.
(3) Try to turn OFF & ON the dosimeter if you encounter technical problems. See the
“Troubleshooting Table” if not recovered.
(4) The dosimeter NRF31 cannot be reset by inserting the plug pin (*Option) if the reset-mode
setting of dosimeter is “OFF”. In this case, please reset the Dosimeter through the Dosimeter
Setting Device.
