Installation and programming manual PiloTREK 2-wire 3
1. INTRODUCTION
1.1 MEASUREMENT PRINCIPLE
FMCW: Frequency Modulated Continuous Wave
The FMCW-radar uses a high frequency signal ~ 10 GHz.
The frequency of the signal is increased linearly by 1 GHz
during the measurement cycle (frequency sweep) The signal is
emitted via an antenna and reflected by the measuring surface
and received time-delayed. The received signal is frequency
shifted. The difference of frequencys ∆f is calculated from the
mixed time signal of the actual transmit frequency and the
received frequency. The difference is directly proportional to the
distance i.e. a large frequency difference correspond to a large
distance and vice versa.
The frequency difference is transformed via a Fourier transformation (FFT) into a frequency spectrum and then the distance
is calculated from the spectrum.The level results from the difference between tank height and distance.
1.2 PRODUCT LIABILITY AND WARRANTY:
The PiloTREK 2-WIRE level gauge is designed solely for measuring the level, distance, volume and reflection of liquids,
pastes, slurries, particulate materials and solids.
The PiloTREK 2-WIRE level gauge does not form part of an overfill protection system as defined in the WHG (German
water pollution regulation).
Local codes and regulations apply to its use in hazardous areas.
Responsibility as to suitability and intended use of these level gauges rests solely with the user.
Improper installation and operation of our level gauges may lead to loss of warranty.
In addition, the "General conditions of sale", form the basis of the purchasing contract.
If you need to return the level gauge to the manufacturer or supplier, please refer to the information given in Section
“Maintenance, error handling”
2. HANDLING AND STORAGE
SAFETY ADVICE
Depending on the version, the device will weigh between approx. 5 kg and 30 kg. To carry, use both hands to
lift the device carefully by the converter housing. If necessary, use lifting gear.
When handling the PiloTREK 2-WIRE, avoid hard blows, jolts, impact, etc.
When storing the "Wave-Stick" version, make sure that the device is not placed on its side on the PTFE antenna, as this may
cause the rod to bend.
3. ITEMS INCLUDED WITH SUPPLY
The scope of supply includes, in the version as ordered:
Signal converter bolted to wave-guide window and antenna;
optionally: antenna extension, sunshade (with fastening material in each case)
Shielding material with tightening strap for instruments with flange (not for the US market)
Installation and programming manual
Certification and approval documents, unless reproduced in the device documentation
Installation material (stud bolts, flange gasket and cabling) not supplied, to be provided by customer!
∆f
Time signal
t
Spectrum
f
