Polimaster PM1401MA User Manual

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2.3 Going through self-tests and background calibration
During self-tests procedures the display first shows message with
firmware version [P-X.X],
message “bAtt” and remaining battery power in relative units on the analog
scale.
Then the message “tESt” is displayed and the unit will perform its self-
test procedures.
After the self-tests are completed the instrument goes to the
background calibration. Message “CAL” (calibration) is activated on the
display during this process, the instrument measures radiation background
and calculates threshold values using the specified values of the n coefficients.
When self-tests and background calibration are finished, the PM1401MA is ready for
operation.
2.4 Operation Modes
In order to meet the demands of every user, PM1401MA can be customized according
to the user’s requirements by means of enabling/disabling various instrument settings and
operation modes. The following operation modes and options are available for the regular
PM1401MA:
• Search Mode – designed mainly for detection and location of gamma radioactive
sources. The readings of the instrument’s gamma detector are displayed in counts per second
(s
-1
) and the search algorithm based on background calibration is used;
• Measurement Mode – designed for measurement of the dose rate of gamma
radiation. In this mode the instrument alarms only in case the safety thresholds is exceeded;
To toggle between various operation modes, the MODE button is used.
2.4.1. Search Mode

Polimaster PM1401MA Specifications

General

Detectors Gamma	CsI(Tl) scintillator
Sensitivity, gamma radiation Cs-137 Am-241	100 s-1/(µSv/h) / (1 s-1/(µR/h)) 100 s-1/(µSv/h) / (1 s-1/(µR/h))
Energy range Gamma	0.06 – 3.0 MeV
Indication range Gamma	0.01 µSv/h – 99.99 µSv/h / (1 µR/h – 9999 µR/h)
Response time	0.25 s
Measurement range Gamma (± 30 % at 137Cs)	0.1 µSv/h – 70 µSv/h / (10 µR/h – 7000 µR/h)
Alarm types	visual, audible and external vibrator
Drop test	1, 5 m (5 ft.) onto concrete surface
Power requirements	one AA size battery
Battery lifetime	Up to 1000 hours
Communication	IR interface
Memory	990 data points
Environmental Temperature range LCD indication Humidity	-30 to +50 °C (-22 to +122 °F ) -15 to +50 °C (+5 to +122, 5 °F ) up to 95 % at +35 °C (+95 °F )
Ingress Protection Rating	IP65

Weight and Dimensions

Dimensions	110х57х32 mm (41/3 х 21/4 х 11/4 in)
Weight, including battery	320 g. (11.29 oz)