Troubleshooting - Axis T90D20 IR-LED User Manual

AXIS T90D Illuminator Series

Troubleshooting

Troubleshooting
Ensure all tests are undertaken by a qualified, trained engineer.
Ensure safe working practices are followed at all times.
• Basics
- Check the LED indicators. See LED Indicators on page 16.
- Check the polarity of the illuminator connection: red = +ve, black = -ve.
- Ensure the illuminator uses the correct power range.
- Ensure the power supply is suitably rated for the product.
- Ensure the telemetry wires are short–circuited or valid telemetry input is applied and correctly wired.
- Check that the photocell is working. If you cover the photocell fully, light should turn on. It can be difficult to
see infra-red illuminators working in high brightness conditions.
• Illuminator test
Note
Use the appropriate multimeter depending on how the illuminator is powered. Cover the photocell fully (or
disable the photocell using the optional remote control) and make sure the telemetry wires are short–circuited or
closed contact input (zero volt) is applied.
- Check that the current is being drawn. The amount of current depends on the power setting of the illuminator.
• Set up camera, lens and illumination
- Make sure the power is set to maximum.
- Check the orientation of illuminator and make sure it is pointing in the correct direction
- Check the angle of the diverging lens. A too narrow angle may cause hot spots and the aperture of the camera
lens to close down. A too wide angle may cause insufficient light on the scene.
• Remote Control (optional accessory)
- Press the Status button to check the status of the remote control, see How to enable or disable the LED
indicators on page 13.
- The illuminator might be in operating mode. See About operating and programming mode on page 8 .
- In bright sunlight, the distance between the remote control and the illuminator may need to be reduced.
- Check the battery on the remote control (CR2025) and replace if necessary.
- Make sure no other strong infra-red source is pointing at the remote receiver.
- Make sure there is a clear line of sight between the illuminator and the remote control.
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