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TelePole WR/ Operating & Maintenance Manual Page 18

Where

n is the detector frequency obtained in the radiation field.

N is the updated measurement reading.

Between 300 R/h to 400 R/h, a weighted average of F2 and F3 is used as the dead time

correction factor. The calculation of the "averaged factor" and the corresponding

measurement formula follow:

x = (last N(R/h) - 300)/100

Last N = previous measurement reading

F average = (1-x)* F4 + x* F5

N(R/h) = [n*F1 + dead time correction {n*F average}/300

The following graph illustrates the ranges over which F2, F3 and F average are used as the

TelePole's dead time correction factor:

5.2. Calibration Procedure (See Appendix 2)

5.2.1. To set the TelePole to the calibration mode unscrew the calibration screw located on the

back of the meter. Turn the internal switch to the calibration position.

In a field higher than 10 mRh, the meter automatically enables only the display and setting

of the appropriate factor, depending on the field intensity.

F1 if the probe head is in a field higher than 10 mR/h and lower than 100 mR/h.

F2 if the probe head is in a field higher than 100 mR/h and lower than 800 mR/h.

Optional switching 070301 Firmware: F2 factor must be set at the range of 800 to

1500 mR/h when using the optional switching firmware

F3 if the probe head is in a field higher than 800 mR/h and lower than 50 R/h.

F4 if the probe head is in a field higher than 50 R/h and lower than 350 R/h.

F5 if the probe head is in a field higher than 350 R/h

5.2.2. Expose the detector to a radiation field of 50 mR/h

±±

20 mR/h.

The display will show:

→ F1 → F (factor) → mR/h (reading) →

↑__________________________________↓

Dead time

correction factor

F average

Field [R/h]

1000

400

300

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 57 58

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MGP WRM2 Dokumentacja Strona 18