Ludlum Measurements 4404-16-4, Руководство пользователя

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Model 4404-16 Geo-Exploration System Technical Manual
Section 5
Ludlum Measurements, Inc. Page 35 April 2018
Description of Controls and
Functions
Input : Voltage input; minimum 7.5 to maximum 35 Vdc, center pin is
positive.
RS-232 : Used in connecting the instrument to a computer, 8-N-1 19.2k
bps, no handshaking.
Detectors 1-12 : Up to 12 detectors may be connected depending on the
chassis size.
Test Points : Each slave board has test point for upper level
discriminator (ULD), lower level discriminator (LLD) and HV readback
voltage (HR).
Amplifier Output : Each slave board has an SMB-type coaxial output
for amplifier out. Use LMI part # 8303-632 (BNC to SMB).
Power LED : Red LED on front panel indicates unit power is on.
Note: Port connection and DTR must be high to activate this LED.
GN : Indicates gain adjustment for each slave board.
Note: At a normal gain setting of “10,” 500 mV on the LLD test point is
equal to a 50 mV detector sensitivity.
Section
5