AWID LR-2000 Specifications download pdf (Page 19)

LR-2000 Manual V1.4 Page 19 of 20

11.8 ISOLATION

 Disconnect everything from the reader, except power. Move the reader to a remote location that has no electrical or RF noise.

Use a backup battery (12 volts, 7.5 ampere-hours, fully charged) instead of the DC power supply. Test using the test unit

and test tags from AWID’s LR-2000KIT Test & Set-up Kit.

• Observe the reader’s performance by itself. Map the reader’s effective RF field by moving the tag slowly, side to side,

gradually farther from the reader. Measure the maximum width of the field, and the farthest point where the tag reads.

(This is the reader’s read range for that tag.)

• Reconnect the rest of the system, one component at a time. Observe the reader’s performance at each step. What is it

that makes the problem re-appear?

 Disconnect other devices near the problem reader. Observe performance of the LR-2000 reader by itself.

• Remove power temporarily from proximity card readers, communications gear, intercoms, telephone-access controllers,

arc-type lamps, PCs and monitors, transformers, motors, etc., that are near the LR-2000.

• When the LR-2000 is connected directly to the system’s panel, disconnect other readers that are connected to that panel.

11.9 REPLACEMENTS AND SUBSTITUTIONS

 Try a different reader in place of the problem reader:

• Is there a spare LR-2000 reader in your truck or at your shop? If so, use it in place of the original reader.

• Is there another LR-2000 reader, installed at this site, operating correctly? If so, interchange the two readers,

and observe if the malfunction moves with the reader or stays at the original location?

• Do you have a different kind of reader, like a proximity reader and a compatible card or tag? If so, wire it into the panel

in place of the LR-2000 reader. This may indicate a panel or system programming problem.

 Do all tags give the same results? Try other tags and compare results.

 Interface the LR-2000 reader to an access control system that has tested good previously with a different reader.

11.10 ENVIRONMENT

 Remove power temporarily from all other equipment near the reader that generates magnetic fields or electric fields.

• Look for communications antennas, PC monitors, arc-type lighting (including fluorescent), heavy electrical equipment

(elevator motors, air conditioners, etc.), RF-type telephone access panels, other RF-type readers (even 125 kHz

proximity readers), high-voltage 60 Hz power lines, etc.

 If the reader’s cable to the system has a junction inside the gate-motor housing, try removing power from the gate motor

for the reader performance tests.

 Shield the reader from possible RF noise sources:

• Form a large sheet of aluminum foil into a hemisphere around the reader’s rear and edges, to block environmental RF

interference. Leave the aluminum foil open in front of the reader so that the reader can communicate with the test tags.

 Remove power from other LR-2000 readers that are less than 12 feet from the tested reader if they are aimed parallel (as in

neighboring lanes at the gates), or less than 30 feet from the tested reader if they are aimed head-on toward the tested reader.

• Does the problem go away? Does the reader operate normally?

 To see how the reader performs when it is removed from possible RF interference, do a “greenfield” test.

• Collect the LR-2000 reader, a back-up battery (or use your truck’s battery), a tag, and the test unit from the Test & Set-up

Kit. Carry them to a remote site away from interfering devices. Test the reader’s performance under these conditions.

11.11 HOST SYSTEM

 Observe messages on the PC monitor while the access control program is running.

• If no message – there may be no data input from the reader to the panel, or from the reader input module to the controller.

• If no message – there may be input data but not with the number of bits for which the system is programmed.

For example, induced noise or data collision may add bits to the normal bit stream from the reader (commonly 26 bits).

• If the message indicates bit-count error, or format error, or parity error, or facility code error, or non-valid identification

number – find the source of the error. It may be incorrect programming of the host system, or of AWID’s cards or tags.

• Watch the “Access denied: …” message. The listed reason for denying access may point to the cause of failure.

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AWID LR-2000 Specifications Page 19

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