ESCO Technologies ETS-LINDGREN SuiteSentry, Operation And Installation Manual

Page: 24 / 34

Page 24 of 34
6.1 Sensitivity Adjustment
SuiteSentry Single Screener produces an audible and visual alarm when detecting ferromagnetic
objects. The sensors in the unit are inherently very sensitive and designed for that purpose.
Furthermore, the sensors in the SuiteSentry Single Screener are so sensitive that attempting to use
them
too near the MR Scanner or other electronic sources will likely cause inconsistent results and/or
reduced sensitivity (as described in Section 3.3) .
SuiteSentry Single Screener sensitivity adjustment is set at the time of detector installation by the
installer. Changing of the sensitivity control should be approached with care as too high a sensitivity
setting may produce undesired alarm activation (False Positives) and too low a sensitivity setting may
cause smaller ferromagnetic objects not to trigger the alarm.
Please refer to Figure 14 for the following steps.
1. Access to the SENSITIVITY control is located behind the top cover on the Sensor Array
Column. Slide the cover up by slightly squeezing and applying steady upward pressure;
the cap will slide up approximately 3 inches exposing the controls.
2. Before adjustment is attempted, turn off the motion detector function
Switch 1 in Figure 14
to keep the portal continuously activated allowing determination of the magnetic
environment where the portal is located. Make sure that the ALARM switch 2
(DIP switch
2 labeled AUDIO ALARM in figure 14)
is in the ON position during the adjustment to verify
alarm is functional. You may shut the alarm off temporarily while adjusting sensitivity.
3. Begin by noting the current setting of the SENSITIVITY control as the original setting. To
determine exactly where the SENSITIVITY control is set, unplug the power cord and plug
it back in, counting the number of beeps produced by the audio alarm. The number of
beeps indicates the specific sensitivity setting of the SENSITIVITY control. One long beep
indicates the sensitivity is set to maximum while one shorter beep indicates that the
sensitivity has been reduced slightly from maximum. The greater the number of beeps
indicates how much the sensitivity has been reduced by the SENSITIVITY control from
maximum. Turn the POWER switch OFF and then ON after each adjustment and note the
change of the sensitivity setting, as indicated by the number of beeps.
4. If increased sensitivity is desired, rotate the SENSITIVITY dial clockwise about ½ of a
division at a time and re-evaluate the performance. Do not increase the SENSITIVITY dial
to the point where any of the blue bars of the bar graph illuminate with ambient
conditions. False positive alarms are likely to occur.
5. If decreased sensitivity is desired, rotate the SENSITIVITY dial counter-clockwise about ½
of a division at a time and re-evaluate the performance. It is recommended to adjust the
sensitivity in one beep increments as described in step 3. The evaluation should include
testing the system with objects which are desired to be detected and insuring that the
alarm is indeed triggered.
6. When the adjustment is complete, turn on the motion detector using Switch 1, and slide
the top cap down.