UVP UVX Radiometer - Manual (Page 13)

UVX Radiometer 13
Change the range switch to the 20 uW/cm
2
position. The display should now indicate 0.10
uW/cm2 and the voltmeter should read .0100 volts Again, if the voltmeter indication did not
decrease by a factor of 10, then the malfunction is in the range changing switch and the unit must
be returned to UVP for repair.
In the event the input amplifier, U1, the range changing switch, and integrated circuit, U4, are
found to be functioning correctly, then the malfunction is in the UVX sensor.
Note: For direct traceability to NIST standards, the sensor must be returned to UVP for repair and
recalibration. Refer to the section in the manual on Sensor Details.
Figure 2: Radiometer Functional Block Diagram