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06/2003

1. General

As implied by its name, the 6150AD probe connector serves for connecting external probes to the

6150AD. However, the probe connector offers additional features, especially to read the 6150AD

instrument by a computer (which is used e.g. by the Automess Dose Rate Acquisition Systems

DES11/12/13). This manual shall provide information to 6150AD users how to use the output signals for

own applications. Throughout this manual it is assumed that the reader is familiar with the operation of

the 6150AD series instruments.

Pin assignment of the probe connector is as follows:

Term (pink)

Control

(gray)

S/E (yellow)

Contrary to e.g. sub-D connectors the pins are not numbered on the body of the connector due to lack of

space. Instead the six pins were given the names indicated above (which are names taken from the

schematics of the 6150AD). All further discussions of the signals will refer to these names. The colours in

parentheses are those of the wires in the Automess standard probe cable. So the easiest way to access the

signals for testing or for connecting some user equipment would probably be to cut a standard probe cable

into two equally sized pieces, which would give two test cables at a time.

The purpose of the signals is listed below an will be discussed in more detail later:

GND

Ground potential. Note that there is no pin for GND. The cable shield serves both as shield

and as ground connection. The aluminium housing of the 6150AD and the AD probes is

electrically equal to GND.

4.75V

Supply voltage for external probes. Identical to supply of 6150AD internal electronics.

PL, S/E

Signals needed for serial readout of probe data (probe type and calibration parameters). PL

(»parallel load«) is an output used to load these data into a shift register. S/E

(»Senden/Empfangen« = »transmit/receive«) is a tri-state bidirectional line used to clock

and read the shift register.

Ext

Pulse input from external probes. External pulses will only be counted if an external probe

was recognized through lines PL and S/E.

Term

Serial output similar to RS232 (»terminal«) for a periodic readout of dose rate by a

computer.

Control

Output to switch between the two GM counters in the telescopic probe AD-t.

External probes require all lines except Control and Term. The two detector probe AD-t additionally

requires the Control line. Term is not required by any probe.

Daimlerstrasse 27

D-68526 Ladenburg

Technical Manual 6150AD Probe Connector

PL (white)

GND (shield)

4.75V (green)

Telefon +49(0)6203-9503-00 http://www.automess.de

Telefax +49(0)6203-9503-29 eMail: [email protected]

Ext

(brown)

Page 2 of 14

USt.-ID-Nr. / VAT ID No.

DE 144 458 420