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The receiver receives data (Data LED occasionnally blinks) but the
sensor list does not contain entries.
The filter in the sensor list may have been activated (start the Logger software
> Menu list > arrow below > sensor filter list). This filter list must be empty.
Otherwise the system will only receive the listed sensors in this list!
How do I check the sensor's operation?
Take care to place the sensors in the receiver's vicinity (at e.g. 3 meters or
less). Check the battery's voltage, which should at least be 1.3 Volt for each
individual cell. Insert the battery cells into the sensor and be careful to choose
the correct polarity (+ and -)!
Within 5 seconds after inserting the last cell, the sensor will start transmitting,
automatically blinking the green LED, followed by the listing of the sensor in
the sensor list.
Is a wireless sensor interfering with other equipment?
The sensor will transmit periodically at a rate of 1 message/minute. The mes-
sage is very short (milliseconds) at a low energy level. Therefore permanent
interference cannot be caused by the sensors. These sensors cannot be
compared to a wireless headset (which will permanently transmit signals) or
mobile phones (which use high RF-energy levels).
The sensors display different values although they are located
next to each other.
The sensors may all be working with a certain margin. One of the temperature
sensors may deviate 0.5 degree upwards and the other sensor may deviate
0.5 degree downwards, which would sum up to a difference of 1 degree! Still
both sensors may be working within their tolerance levels and specifications.
Other causes for differences may be the local position, draught and the sun-
light respectively shadow position of the sensors.
Are the sensors calibrated and how can we calibrate the system?
We use digital sensors, which are guaranteed to work within their factory spe-
cifications. Some customers (hospitals and pharmacies) order certified specia-
lists to calibrate their AREXX sensors once a year at their installed equipment
site.
Systematic deviations and tolerances may be compensated by an offset value
in the software. See Logger Software (Sensor List > Left mouse click on sen-
sor > Sensor properties > Offset).
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