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Detailed Sensor Description
Versions
When ordering parts, or seeking help troubleshooting, you must know the correct sensor version or model
number. At the writing of this manual, there are two versions of the Source 12 Basis Weight Sensor, -00 and -
01. Their only difference is the radiation interlock PCB, which comes in two versions. This board is located on
the source holder assembly and is visible by opening the Modular Head access cover. The following table
describes where the two Source 12 versions are used:
Model #
09420200 -00 Basis Weight Sensor, Line Source,
09420201 -01 Basis Weight Sensor, Line Source,
Source 12 Hardware
An understanding of the major hardware components and their functions is necessary for proper maintenance.
The Source 12 Basis Weight Sensor hardware and its heads consists of the following:
1. Source holder assembly containing the radioactive Promethium source capsule
2. Source head containing source holder, backplane, and source air curtain.
3. Receiver assembly containing detector, amplifier, and integral air curtain.
4. Receiver head containing receiver assembly (with integral air curtain) and backplane.
Source Holder
Figure 1 is a view of the Source 12 Source Holder assembly. Major features are identified:
aperture, shutter, source air column temperature measuring device, mechanical shutter indicator arm, mounting
tabs, Sx 12 Radiation Interlock PCB, fire safety pin, and blue cover. Underneath the blue aluminum cover are
the air cylinders and solenoid actuators for the shutter and both flags as well, orifice restrictors, and plumbing
hoses.
Version
PM147 , LED Radiation Lights
PM147 , Incadescent Radiation Lights
Where used
Used on scanners with
LED radiation warning
light
Used on scanner with
incandescent radiation
warning light
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