MGP WRM2 Spezifikationen PDF herunterladen (Seite 27)

TelePole WR/ Operating & Maintenance Manual Page 27

7.1.2. Power Supply

DRW #12850-42-00.

H.V. Board Block Diagram

High Voltage Converter & Internal Geiger (optional)

The high voltage converter and internal geiger components are installed on the board

only when the internal geiger is used. As well, a short is performed on jumper E3. When

the microcontroller identifies the short on E3 via J5/5, the internal geiger is activated.

High Voltage Circuit for the Internal Geiger

The H.V. circuit includes an ORAM 5525 transformer, a voltage multiplier (D4, D5, D6,

C7, C3), and an RV4192 switching regulator.

R10 and R9 are voltage feedback for the switching regulator.

The high voltage, 500V ±5% generated in the H.V. circuit is transmitted to the geiger.

When the Geiger is positioned in a radiation field, positive pulses are obtained on

pin K1 of the Geiger. These pulses are shaped and amplified by Q1, Q4 and RC

components.

High Voltage

Converter

Option

Internal Geiger

3V to 5V

Converter &

Low Battery

Identification

3V to 12V

Converter

Internal / External

Geiger

WRM

Communication

Geiger

Calibration

Switch

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MGP WRM2 Spezifikationen Seite 27