Eaton Spyder 738r Manuel D'installation page 11

Example Jumper Settings
Reduced Sensitivity (see Fig 5). Use on: hardwood or metal window and door frames, or
on masonry walls.
Normal (see Fig 6). Use on: softwood or plastic window and door frames, where there is
excess paint, a long distance from glass, or around large glass windows. Note that this is
the default setting when the 738r is delivered from the factory.
Improved Discrimination (see Fig 7). Use in installations with high background noise,
for example near to busy roads or railway lines. If the shock sensor is not triggered then
remove jumper A to select High Sensitivity. Re-calibrate.
Note: In the above examples, if the shock sensor is not triggered turn pot VR1 clockwise to
make more sensitive and re-calibrate.
To commission the 738r:
1. Fit jumper C and A to put the 738r into calibration mode at low sensitivity (see Fig 8).
Note: If the battery is low then the Calibration LED flashes continuously. Fit a new battery.
2. Turn VR1 fully anti-clockwise. The 738r is now at its lowest sensitivity.
3. Strike the extremities of the area you wish the 738r to guard. Use a blunt, hard-sur-
faced tool, for example a screw driver handle.
The calibration LED flashes when the sensor detects the shock: once for a small shock,
twice for an alarm level shock, and three times for a very large shock.
4. Adjust the sensitivity until the calibration LED flashes twice for each blow on the ex-
tremity of the area you wish to guard.
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