MGP WRM2 Dokumentacja Pobierz pdf (Strona 41)

TelePole WR/ Operating & Maintenance Manual Page 41

8.14. Detector failure (PC 2003)

The detector alarm is activated when:

- The detector high voltage power supply is defective.

- The detector is located in a background radiation field and the low range Geiger is

defective. If the detector is located in a radiation field higher than 800mR/h, and the

meter displays the following readings sequence: 800 mR/h, 600 mR/h, 0.00 mR/h -

this indicates high range Geiger malfunction.

Check (500÷550)V

on R4/R5

Check 5V on C2

Check (500÷550)V

on R4/R5

Check positive

pulses on ZP1201

G1 (Geiger pin)

O.K.

Detector failure

O.K.

Yes

O.K.

Replace U3

END

Replace Q2 or Q4

Check TTL pulses

on U3/8

Check TTL pulses

on J1/4

Replace U1

Replace T1

Check and fix the

cable between

meter & detector

O.K.

Replace Q3 & Q1

Check TTL pulses

on U3/1

Check (500÷550)V

on R4/R5

Check (500÷550)V

on R4/R5

Replace Card

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 57 58

Brak uwag

MGP WRM2 Dokumentacja Strona 41