Operations Manual

EXI HALO Installation & Operation Manual 981-000003-000
EXI Wireless Systems 20 March 2000
Revision 2.0
5.7.1.3. OPTION SWITCH SETTING
Option
Switch
Function Patient Monitoring Authorized Entry
0 Don’t act on any Tags No Tags are stopped No Tags authorized
1 Act on all Tags All Tags will be
stopped
All Tags authorized
5.7.1.4. THRESHOLD / RX SENSITIVITY SWITCH
The Threshold switch may be adjusted to increase or reduce the sensitivity of the Receiver and therefore
the range of detection of the Tag.
It is also used to remove some of the background noise as well as reduce interference from tags if the
controller is having trouble detecting tags. The result in the adjustment raises the RF field strength
threshold received from the tags in order to trigger the CPM into alarm (ie. from 25uV to 50uV) and
reduces the detection field range.
‘0’ = MAX sensitivity & ‘F’ = MIN sensitivity. The default setting is “2”.
5.7.1.5. TEST CONTROLLER AND SET UP FIELDS
After reading LOCATION FOR SRA EXCITER ANTENNAS, choose a suitable location for the SRA.
Setting up a field is a matter of experience gained by trial and error. The primary considerations here are
the field shape and strength. The field has to fill the area in front of the door all the way to the floor so that
no tag can reach the door without being detected.
To set up a field, start by placing the tag at the range you want for the field at the height a tag is usually
going to be found. The tag needs to be detected far enough from the door to allow the magnetic door lock
time to energize. The tag should be placed on a non-metallic surface for testing. You might want to do a
preliminary field setup by holding the SRA at the approximate location you want to install it but be aware
that your body could be affecting the field. The SRA should be temporarily placed and the field adjusted
for range using this stationary tag. Since the Tag will be read easier in some orientations with respect to the
SRA, it is also necessary to test with the Tag in a variety of positions.
With the SRA and tag in position use the SRA RANGE ADJUST control on the top right corner of the
controller circuit board to set up your field strength. Turn the control shaft clockwise for maximum field
range and counter clockwise for minimum field range.
Holding the tag, slowly pass through all the areas that you need the field to cover. DON’T FORGET
DOWN BY THE FLOOR. The device should continue to beep at a steady rate. An uneven rate indicates
that the controller is not able to read the tag successfully every time.
The final step is to ensure that the field does not extend into other rooms or areas that are regularly
occupied by tags. These tags could inadvertently keep a controller in an alarm state.
5.8. INSTALLING RECEIVERS
Receivers are meant for use where only a “TIC” signal needs to be detected. The “Relay” light on the front of
the receiver comes on to indicate relay activation when a “TIC” is detected. Receivers are not capable of
creating a field of energy using Exciters, as Controllers can, and therefore do not have to be connected to the
Exciter Antennae. Install the RX Antenna onto the Receiver and swivel it so that it is in the vertical plane.
Place the Receiver in the approximate location for final use, connect the power supply and power-up.