PRASTEL 2PH60C Manual Del Usario página 10

2PH60C
Three pairs in a line
TX CH1
Two overlapping pairs
TX CH1
TX CH3
11. OPTIC ALIGNMENT
1. Power the transmitter and the receiver
2. Look through the alignment finder on the receiver
and adjust the vertical and horizontal angle until the
transmitter is located in the centre of the finder.
3. Connect a voltmeter with 10VDC end of scale to
inputs Monitor (+) and Monitor (-) on the receiver
(see fig. 1).
4. Position the attenuation sheet provided on the upper
pair of lenses of the TX and of the RX.
5. Adjust the horizontal and vertical alignment (in that
order) both on the Transmitter and on the Receiver,
until the maximum value is obtained on the voltmeter.
6. Repeat points 4 and 5 on the lower pair of lenses.
7. Once the alignment has been checked, remove
the voltmeter and the attenuation sheets.
The table below gives the voltage values on the Monitor
terminals in the various alignment situations
(values with attenuation sheets)
Voltage on Monitor terminals
Between 250 mV and 700 mV
RX CH1 RX CH1
RX CH1
RX CH3
Over 700 mV
Under 250 mV
ENGLISH
TX CH1 TX CH3
Four overlapping pairs
TX CH1
TX CH3
RX CH2
RX CH4
Vertical adjustment
(rough)
Alignment level
Excellent
RX CH3
RX CH1
RX CH3
TX CH2
TX CH4
Voltmeter (+)
Voltmeter (-)
(Receiver)
Good
Poor
IS2PH60C_11_14
Optic finder
for alignment
Vertical adjustment
(fine)
Attenuation
sheet
10