LUDLUM 2350-1, Руководство пользователя

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MODEL 2350-1 Data Logger
5
1. INITIAL INSTRUMENT CALIBRATION
10. If the instrument does not read approximately 300 kC/m adjust the gain pot (R10) on the main
board until it reads properly.
NOTE: The instrument threshold is now set at 100 = 10 mV
11. Turn the window ON (WON), and set it to 100 (W100).
12. Adjust the pulse amplitude control until it reads approximately 20 mV. The ratemeter reading
should again indicate approximately 75% of the counts (300 kC/m).
13. Adjust the threshold setting to 200 (T200), 300 (T300), and 400 (T400) repeating the above procedure
each time to verify that the threshold and window settings are linear.
14.Turn the window off (WOFF) and reset the threshold to 100 (T100).
High Voltage Calibration
15. Disconnect the instrument from the pulser and connect it to a high impedance voltmeter.
16. Set the high voltage to 1500 volts (H1500).
17. If the voltmeter does not read from 1498 - 1502 volts adjust the HV pot (R52) on the main board
until it reads within tolerance.
18. Adjust the high voltage to 500 volts (H500). The voltmeter should read between 490 - 510 volts.
19. Adjust the high voltage to 2000 volts (H2000). The voltmeter should read between 1940 - 2060
volts.
Overload Calibration
21. Disconnect the instrument from the voltmeter, and connect it to the overload simulator resistor
box.
22. Change to the Alarm Display (SVD3).
23. Turn the overload on (OON), and set it to 15.0
m
A (O150).
24. Change to the Parameter Display (SVD1).
25. Set the high voltage to 1500 volts (H1500).
26. Change to the Main Display (SVD0). The ratemeter display at the top of the screen should be
alternating between the ratemeter display and the word OVERLOAD at approximately 1 second
intervals.
27. If this is not occuring adjust the OVERLOAD pot (R7) on the main board until the display alternates
properly.
28. Adjust the high voltage to 1000 volts (H1000). The overload indicator should stop appearing.
29. Adjust the overlaod to 10.0
m
A (O100). The OVERLAOD indicator should again begin to alternate
with the ratemeter indicator.
30. Repeat steps 28 and 29 again with a voltage setting of 500 (H500) volts and an overload setting of
5
m
A (O50).
31. When properly completed turn the overload alarm off (OOFF).