Spectral Instruments Series 800, User Manual, Page: 23 / 70

Spectral Instruments
Pt # 2500- 23
requirements are given below and are labeled on the back of the power supply. Power
and fuse changes are accomplished as follows:
1) Make certain that the power cord is not plugged into the power supply!
2) Using a small flat-head screw driver, insert it into the small recess on the left hand
side of the fuse holder module. Gently pry the fuse holder out of the module. Inside,
fuses are visible. Inspect the fuse values. For 230-240 mains, the fuses must be T1.0
fuses or T1.5 depending upon the TEC power supply installed. For 100-120 mains the
fuses must be T2.0 or T3.0 fuses, again depending upon the TEC supply installed. All
of the fuses are 5-20 (metric) fuses and they must be TUV approved.
3) Using a small pair of pliers or strong tweezers, carefully remove the very small
circuit board assembly that resides on the right hand side of the cavity exposed when
the fuse holder was removed. This is a 2-part power selector. The circuit board,
inserted with the correct power indicated at the leading edge of the circuit board,
actually makes the proper power connection to the power entry module. The small
plastic indicator can be “wiggled around” so as to point its dot in the opposite
direction. The effect of repositioning the dot is to move it up or down to indicate the
proper power selection when the unit is reassembled. Once the dot is opposite the
power label you selected, replace the circuit board assembly.
4) Insert the fuse holder module and inspect the power setting now indicated by the
white dot. If it is not correct then redo steps 2 and 3 until it is correct.
5) The six fuses (labeled F1, F2, F3, F4, F5 and F6) for the DC power must be correct
for the incoming line voltage. The first three fuses are identical and are T0.5A for
100/120 volts incoming power. The second set of fuses are also identical and are
T1.5A for 100/120 voltage. For 230/240 the two sets are 1.4A and 0.75A
respectively.
Once the AC power setting on the electronics unit has been set up for the local AC
power, assembly of the camera consists of connecting the power supply cable to the
camera.
2.3.3 Digital Camera Interface
Spectral provides two versions of the computer interface module. One is the PDCI-
AIA parallel data card that is a PCI bus interface card for the Spectral Instruments 500,
600 and 800 Series cameras. It accepts camera image data at rates up to 10 MHz and
directs it to computer memory by bus-master direct memory access. It also transmits
and receives RS422 levels for camera communications. The interface card connects to
the camera by a 68-pin to 50-pin high-density cable.
The other data interface option is the PDCI-FO, a fiber optic module with the same
characteristics insofar as the host computer device driver is concerned. It has a MT-RJ
fiber optic connector instead of the 68-pin AIA connector.