How can I tell which eye is bad? 


The Pantron photo eyes have a built in diagnostics chip that will allow the end user to test and see weather the receiver or the transmitter has failed. 


To put amplifier into test mode, briefly press the Reset / Test Mode button and let it go. Holding this button

will result in a full reset. If the following LED’s flash, please note the instructions included:


  • No Signal LED: If this LED flashes with the Alarm LED, the transmitter or receiver is either out of alignment

    or there is an obstruction preventing the two eyes from seeing each other. To check alignment, we

    recommend the “String Method”. Pull a piece of string between the eyes to simulate the path of the infrared

    beam. A clear signal should be possible if the photoeyes and their cables are not damaged.

  • Signal Strength LED: If this LED blinks by itself, the eyes can see each other and the number of blinks

            shows the strength of the infrared beam. (1 blink signifies the weakest beam and 10 is the strongest). If the

            signal strength is low, try cleaning the face of the photoeye and realign them.

  • Transmitter Fail LED: If this LED blinks with the Alarm LED, watch how fast it blinks. If it blinks faster

            than the Alarm LED, there is a short on the transmitter side. Check your cable connections to make sure

            they are correct. If it blinks the same slow speed as the Alarm LED, there is an open on the transmitter

            side. Check the cable, first where it connects to the amplifier, and second in any areas where the cable is

            exposed or where there are splices. If you need to splice the wires, use a high quality .22 gauge cable,

            splice and solder the wires, and wrap with heat shrink tubing. If possible, do not use wire nuts! Also, if you

            are using quick disconnect photoeyes and cables, please use a silicon sealant to prevent corrosion buildup

            inside the connector.

  • Receiver Fail LED: If this LED blinks with the Alarm LED, watch how fast it blinks. If it blinks faster

            than the Alarm LED, there is a short on the receiver side. Check your cable connections to make sure they

            are correct. If it blinks the same slow speed as the Alarm LED, there is an open on the transmitter side.


            Check the cable, first where it connects to the amplifier, and second in any areas where the cable is exposed

            or where there are splices. If you need to splice the wires, use a high quality .22 gauge cable, splice and

            solder the wires, and wrap with heat shrink tubing. If possible, do not use wire nuts! Also, if you are using

            quick disconnect photoeyes and cables, please use a silicon sealant to prevent corrosion buildup inside the

            connector.