General; Functionality; Photocell Features; Type Of Photocell - ALGE-Timing Photocell PR1a Manual

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General

The photocell PR1a combines highest precision and performance with smallest dimensions.

1.1 Functionality

The photocell transmitter sends a modulated light beam in infrared range. The receiver moni-
tors the light beam for disruptions. In case of a disruption of the infrared beam the receiver
releases a pulse. For multipurpose use the photocell can be operated in three different oper-
ation modes: reflection photocell, transmitter and receiver.

1.2 Photocell Features

x Releasing accuracy 1/10.000 second
x Diversity of types:
Reflection photocell
One-way photocell for large distances
x Large photocell range:
Reflection photocell approx. 25 m
Transmitter and receiver photocell more than 150 m
x Variable supply of the photocell:
Battery operation
Supply from ALGE timing device
External supply from 4 to 18 VDC
x Battery condition indication with LED (green, yellow, red)
x Indication of the photocell alignment with LED (green, yellow, red)
x Synchronisation of two photocells (main and backup), to prevent interferences
x Setting of dead time (approx. 20 ms to 2 s /factory setting = 20 ms)
1.3 Types of photocell
According to its type the photocell can consist of the following parts:
Photocell PR1a
Tripod TRI128
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Manual
PR1a
Reflector PR1a-Ref
Photocell cable 001-10
Mounting bracket BBG
Photocell cable 001-30