Appendix D. 8520Cs Signal Selector; Introduction; Leading Particulars; Table D-1. 8520Cs Signal Selector (Only - Honeywell Chadwick-Helmuth 8500C Maintenance Manual

Appendix D. 8520CS Signal Selector

D.1 Introduction
The 8520CS Signal Selector is similar to the 8520C Signal Selector referenced in Section 4, but it has
inputs for 8 Velocimeter channels, rather than 12 channels. The 8520CS also has the following input
channels: 4 balanced differential output Accelerometers, 2 Magnetic Pickups and 2 Photocells
compatible with the Chadwick-Helmuth 10200 Photoprobe. The following sections highlight the
differences between the 8520CS and 8520C in the areas of physical description, theory of operation,
and testing. Disassembly/reassembly instructions and a parts list are also included.
D.2 Leading Particulars
Input Power
Velocimeter signal input levels
Input Impedance
Accelerometer (balanced differential output)
- Frequency Response:
Magnetic pickup signal inputs
Photocell input:
Dimensions:
Weight

Table D-1. 8520CS Signal Selector (Only)

28VDC
8 Channels, 0 to 7.125Vpk
100K (unselected channel), 2.5K (selected)
4 Channels, 10-150 pC/g (programmable)
+/-2% 14Hz to 20kHz
-5% at 8Hz (nominal)
-12% at 5Hz (nominal)
2 channels, 0.5Vpk to 12Vpk
2 channels, compatible with Chadwick-
Helmuth's high speed Photocell Probe 10200
(ref Manual 10473-1)
7.1 x 10.81 w x 4.01 h in.
4.5 lbs
8500C/8500C+ System Maintenance Manual D-1