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Rybak1943

USA
4 Posts
Posted - 04/16/2014 :  16:07:12  Show Profile  Reply with Quote
I need to reload Factory setting to my GMC-300E, which is available in:
Init Setup/Factory Reset
Can you please inform me how can I navigate to Init Setup?
Reply #1

ZLM

1261 Posts
Posted - 04/18/2014 :  09:06:36  Show Profile  Reply with Quote
1. Press menu(S4) key to Main menu
2. Press arrow down(S3) key to scroll down to the Init Setup menu item.
3. Press enter (S4) key to enter this menu.
4. Select Factory reset and then press the enter(S4) key to start a factory reset confirmation.
5. Press any key will toggle the confirmation YES and NO. Select YES to confirm and wait for the popup message goes away to complete the factory reset.
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Reply #2

myf

France
6 Posts
Posted - 06/10/2018 :  09:30:36  Show Profile  Reply with Quote
Hello,

I have a gmc-300E and I get CPM on laptop by USB link with a Python program. I don't know how to transform these CPM to µSv/h.

I can read both the µSv/h value and CPM value on the device display but I can only get CPM on the laptop.

Is it a linear formula ? Sv/h = k*CPM. what is k value ?
Is there a false time correction ? Sv/h = k* CPM / (1 - a*CPM)
Is there a temperature coefficient ?
What is the tube reference ?

Thank you a lot for your help !

François (From France)

The program I write is this one, but you must indent inside the test if..else: and inside the while: loop.

import serial, time

ser = serial.Serial("/dev/ttyUSB0", 57600)
ser.write (("<<GETVER>>"+chr(0)).encode(encoding='utf-8'))
time.sleep(1)
print ((str(ser.read_all ()))[2:-1])

while True :
ser.write (("<<GETCPM>>"+chr(0)).encode(encoding='utf-8'))
time.sleep(1)
res = ser.read_all ()
if len (res) == 2 :
print (time.ctime() + " , " + str(res[0]*256+res[1]) + "CPM")
else :
print (time.ctime() + " , ERROR")
time.sleep(59)
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Reply #3

ullix

Germany
1171 Posts
Posted - 06/10/2018 :  23:36:59  Show Profile  Reply with Quote
There is a simple factor between CPM and µSv/h:

Dose Rate [µSv/h] = CPM * 0.0065

An advanced Python Program GeigerLog is available here:
https://sourceforge.net/projects/geigerlog/

The GeigerLog manual explains the relationship of CPM and µSv/h in more detail.
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Reply #4

myf

France
6 Posts
Posted - 06/11/2018 :  01:20:41  Show Profile  Reply with Quote
Hello Ullix,

Thank you very much for your so precise answer !

I install phonon on my laptop and now all is pretty...

sudo apt-get install python3-pyqt4.phonon

Now I'll test a gps logger and maybe will play with openradiation.

h**p://www.openradiation.org/

Have a nice day !

F. from France
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Reply #5

EmfDev

2250 Posts
Posted - 06/11/2018 :  08:24:15  Show Profile  Reply with Quote
Thanks ullix :D
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