Iridium mono 2k IR 1040 06 V4 - Installation of the IRD system

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Installation of the IRD system

For the installation of the IRD system you do not need any complicated devices (e.g. oscilloscope). Recommended tools and equipment for single-antenna installation: drilling machine, screwdriver, pincers, and fasteners with appropriate screws. In case of multiple-antenna installation, you additionally need a wire for synchronisation of the individual systems. If the customer desires to cover this wire you will need covering rails for cabling (including fasteners and screws for rails installation). Other possibility is to hide the cable into a groove; possibly you will need floor saw, high-performance vacuum, and silicon sealer or cement jointing material - according to the floor kind and character of shop. Do not forget about the samples of tags for testing of detection distance.

Installation procedure

The location of installation

If it is possible, one should abide by the following recommendations when choosing a location of installation: the distance of the system from vertical electric conduits should be at least 1 m the distance of the system from huge metal constructions should be at least 0.5 m if it is possible, don’t install the system closer then 15 cm from the wall or close to potential sources of noise as: air conditioner, switched-on power supplies, PC, power lines etc. if one needs to install the system in the proximity of large metal frame (shop window, window etc.), we fix it in a perpendicular position, if possible. Note: a plastic window, if it can be opened, can also have a metal frame. For parallel installation in the proximity of huge metal frames, false alarms can occur. leading supply cables should be as short as possible there should be no other appliances connected to the same inlet 230 V socket don’t let a metal door be opened into the detection zone of the antenna

Provisional verification of the functionality of the system

We assemble the system on the chosen location of installation, connect it to the supply network and set the following parameters of the electronics board:

NodE NASt
trNo SS4n
rESP SloU
SEnS SEHI
tAGS PAPI, or HArd depending on the used tags at the installation site
PAPI – detection of paper labels without their destruction required
HArd – only hard tags are used
GAIn Auto
PoUt 100%
dENo Auto

Other parameters do not yet matter for temporary adjustment.
Turn the antenna off and on, wait for about 3 minutes, use the +, - to display the actual measured data. The displayed data represents the maximum measured value from the last 32 measurements in 0.64 seconds (50 Hz network frequency). In case the electronics detects error states for which it can not register the label in the detection frame (can not declare an alarm), it signals (using both light and sound) a series of short beeps and flashes that repeat. The number of "beeps" characterizes the type of error (Chapter 9. Error messages). Press the +, - buttons to display parameters 3, 4.

1,2 input signal level in channel 1, 2 in %. The displayed signal value in channels 1, 2 may range from 35% to 87%. The closer the measured value is to the background level (parameter 3, 4) of 35% to 41%, the better, as it indicates minimal environmental resonance (small environmental impact on frame detection). If the measured values do not change quickly, it means that the environment is more stable (without rapid background changes) and therefore less susceptible to false alarm generation.
3,4 average background level in channel 1, 2 in %. The background level is the value of the input signal outside of frame transmission (background). In automatic gain setting mode the electronics board tries to set the background level between 35% to 41%. If the displayed value is less than 35%, there is a large resonance in the environment, or a label is left in the antenna area. In this case, tag detection is already affected and the detection distance is shorter. The displayed value should never be greater than 44% in the automatic gain setting mode.
5,6 the level of resonance in the input signal. The resonance represents the difference between the level of the input signal and the average background level in the channel 1, 2 in %. Display 5 = channels 1-3, 6 = channels 2-4. A value of up to 20% is acceptable. If the value is greater than 20, the surrounding environment has a great impact on the frame detection, or there is a forgotten label near the antenna.
7,8 the gain of the signal in channel 1, 2. The gain is continuously set so that the background level is maintained at a level of 35% to 41%. A value of 25 to 100% is appropriate. Higher gain value is better because of the longer detection distance of the antenna. The gain value is significantly affected by the background signal level, the most unfavorable is the effect of permanent transmission (dual antennas nearby) or resonant metal objects (doors, windows, cables, ...). A value of less than 20% in both channels indicates a large effect on the detection distance. It is usually caused by two causes. The first cause is strong interference in the background, most likely caused by dual frames broadcasting nearby. In this case the level of persistent resonance is low (5, 6) and the background level is in the range of 35% to 41% of the usual values. The cause reflects itself only in a low gain. The second reason is the resonance in the antenna space or a forgotten label. This cause can be identified by a high level of persistent resonance (5, 6) and a low background level (3, 4) of less than 3
9,10 share of the input signal with an alarm value in %. A value of 100 is an alarm, the value of 50% indicates that the input signal has only half the level required to declare the alarm. The optimal value is 70% to 85%. A lower value of 70% indicates shorter detection distances but greater resistance to false alarms, a value higher than 85% indicates a longer detection distance but more false alarms.
11 total number of alarm level exceedings in channel 1. The number with a decimal point after the last digit is the total number of alarm level exceeded in channel 2; display is constantly alternating. In the environment there may be random interference that exceeds the alarm signal level, electronics will recognize these random "alarms" and will not alert (unless they meet the alarm requirements) but any alarm level exceeding is recorded. In the ideal case 0 is displayed (no alarm level exceeding). This is true only if no alarm is displayed (display 12 shows 0). The alarm number can not be reset using the buttons, so it is suitable for monitoring the interference for a certain time. Based on these data, the possibility of false alarms can be assumed. The value is reset only by switching off the antenna, by power failure or by remote internet control (requires remote control module connection).
12 total number of alarms. The number represents the total number of valid alarms in Channel 1 and 2 together. If an alarm happens in channel 1 and 2 at the same time, it is recorded as a single alarm. The number of alarms recorded can not be reset. The value is reset only by switching off the frame, by power failure or remote internet control (requires remote control module connection).

Using a test tag, we check frame detection parameters. If we are satisfied with the detection parameters, no additional electronics settings are required, and we use the automatic settings.
If the detection distance is considerably small, the cause can be temporary or permanent interference. If the location of installation is changed in this case, the system detection will usually become higher. If this does not help, it can be the problem of temporary noise from the surrounding or very strong permanent noise. We wait a moment and if the reason for small detection was temporary noise, the detection distance usually becomes higher after repeated testing.

Approval of place installation by a responsible person (owner, business manager etc.)

Never forget to meet this important requirement. In case you forget, some installation problems can occur in the future.

Finally, fix the system to the floor. In case of multiple (two or more IRD systems) installations, set the synchronization of the individual antennas.

Check the detection parameters of the system once more and then hand over the installed set to the customer together with the operating manual.