AWID LR-2000 Specifications download pdf (Page 20)

LR-2000 Manual V1.4 Page 20 of 20

 Program the host system to configure the data input from the readers.

• Enter the code format of the tags (usually “26-bit Wiegand standard”), the tags’ facility code or site code,

and (in the cardholders database) the ID number for the UHF tag.

• Program your own test tag as an administrator, with top-priority level, access to all doors or gates, for all days and times.

 If the tag’s code data shown on the PC monitor are different from the code that is printed on the tag’s label –

• Consistently wrong code for every read indicates that the tag is programmed wrong. Test the code from a different tag.

• Randomly different code for every tag read indicates induced noise, intermittent wiring connection, or incorrect

system grounding. Check for cable and wiring problems.

 If the problem is data collision in the host system because it can not process repeated code inputs quickly enough –

o Use the reader’s arming circuit to transmit a single code read to the system. Touch the yellow wire to the black wire

for only about one-half second. Does the system process the single code transmission correctly, every time?

o Contact AWID about slowing the LR-2000 reader’s repetition read rate to prevent data collision in the host system.

11.12 POINTERS

 Keep the screws that fasten the aluminum plate to the reader’s plastic housing in place. Do not drill holes in the plate.

 Shield the LR-2000 from heavy rain, or from bright sunshine in hot weather. Use a suitable shade, hood or cabinet.

 Remove heavy snow from the face of the LR-2000 reader.

 Wipe snow and rain from the windshield. Wash salt coating from the windshield. Avoid metal films and embedded wires.

11.13 TESTING TOOLS AND TECHNIQUES

 Digital multimeter (DMM): Absolutely necessary for voltage checks, and for current measurements at the reader.

 Oscilloscope: Useful for observing digital data output at the reader and input at the panel, and for analyzing the pulse shape.

 Test tags: Test the tags on a reader that is known to work well, to be sure that the tags work at their full rating.

 Reader substitution: Indicates whether the problem is in the reader or in the other components at the “bad” location.

12 GLOSSARY

Controller panel................. The electronic device that contains the input data port for the LR-2000 reader. For the Wiegand interface,

this may be the access control system’s panel or board near the reader or gate operator, or the reader input

module (RIM). For the RS-232 interface, this may be the system controller or a PC’s serial input port.

Credential........................... A token, such as a card or tag, that carries data to identify the individual token, and therefore to identify

the person or vehicle by which the token is carried.

Effective RF field ............... The three-dimensional space in front of the LR-2000 reader in which the vehicle tag can be read by the

reader. The field is circularly polarized. It has a circular cross-section at every distance from the reader.

See Figure 1 for a diagram of the effective RF field.

Isolation .............................. A trouble-shooting technique that separates the components of the system temporarily so that

performance of the components can be observed and measured individually.

Lane..................................... The roadway that leads the vehicle past the reader and toward the gate. The ideal lane is a single

vehicle width, or is marked by signs, painted stripes, cones, posts, bollards or barriers that remind

the drivers to stay close to the reader.

Power supply, switching.... A DC power supply whose DC output is generated by a circuit that produces interrupted current flow,

at a rate of around 25 kilohertz.

Read range The space along the axis of the reader’s effective RF field in which the tag can be read in hand-held

testing. This extends from the LR-2000 reader’s face to the maximum distance – typically between

10 feet and 15 feet, depending upon the tag. (See Figure 1, “Effective RF field”.)

Substitution ........................ A trouble-shooting technique that replaces a component of uncertain performance with a similar

component that you know works well.

Sweet spot ........................... The space in front of the LR-2000 reader where most credentials in a given installation are read. This is

typically about 10 feet to 15 feet direct measurement from the face of the reader. At the sweet spot,

the reader’s effective RF field has a cross-section with a diameter of about 3 feet or more.

Tag orientation................... Direction (“landscape” or “portrait”) that tags are mounted in or on vehicles. If the reader looks down

on a tag, landscape may give best reading. If the reader is at the side of the vehicle, portrait may be best.

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AWID LR-2000 Specifications Page 20

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