Automess 6150AD Manuel technique - Page 6

Parcourez en ligne ou téléchargez le pdf Manuel technique pour {nom_de_la_catégorie} Automess 6150AD. Automess 6150AD 7 pages. Dose rate meter probe connector

Imprimer la page

06/2003

det$ = "Probe AD-17"

unit$ = "cps"

CASE 18

det$ = "Probe AD-18"

CASE 19

det$ = "Probe AD-19"

unit$ = "cps"

CASE 20

det$ = "internal GM"

CASE 21

det$ = "AD-t low DR"

CASE 22

det$ = "AD-t high DR"

END SELECT

RETURN

' ---------------------------------------------------------------------

Handler for transmission errors

' ---------------------------------------------------------------------

RecvErr:

IF ERR = DEVERR THEN PRINT TIME$; " Transmission Error": RESUME MainLoop

ON ERROR GOTO 0

2.2 »Control«

This output switches between the two GM counters in the telescopic probe AD-t, where Control = high

(4.75V) selects the low dose rate GM counter, and Control = low (GND) selects the high dose rate GM

counter. If any other or no probe is connected, Control will always be high.

Certain software versions of the 6150AD (e.g., the Swedish version V-36.04) make additional use of the

Control output: With the AD-t probe, Control will operate as described above. With any other or no probe

the Control output will signal dose rate alarm: Control = high indicates that dose rate alarm is off, and

Control = low indicates that dose rate alarm is on. This allows triggering of external alarming devices.

However, one has to consider that the Control output can only drive very small loads due to its internal

structure:

micro-

processor

The microprocessor port can sink only a few mA and can source almost no current, because the high state

is achieved through a weak pull-up resistor of 10-100 kOhms depending on the manufacturer of the

microprocessor. The Control output can therefore only drive high impedance low capacity inputs like

CMOS gates as shown in the drawing above. Such buffering is strongly recommended before connecting

some external device.

Daimlerstrasse 27

D-68526 Ladenburg

Technical Manual 6150AD Probe Connector

6150AD

4.75V

Control

port

GND

1 kOhm

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

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

CMOS gate 4000 series

(e.g. 4049, 4069, 40106)

buffered

output

(inverted)

Page 6 of 14

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

DE 144 458 420