RADAR LEVEL METERS Radar level meters with guided wave (principle tdr) • Suited to continuous level mesurement of various liquid, mush and bulksolid materials. • Universal use, direct mounting into containers, silos, vessels, reservoirs, etc. • Stainless steel rod or rope electrode • Measuring range up to 40m • Linear measurement in non-conductive and in differently shaped containers • Quick view measured values on the display • Simple installation and setting • Current output (4 ... 20 mA), HART® protocol The GRLM® radar level meters are compact measurement devices including an transmitter of microwave pulses, central processor unit and display module. Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments The electronics transmits very short electrical pulses (0.5 ns), which are linked to a onewire transmission line (measuring electrode). Measuring electrode can be created of rod or rope. The pulse propagates along the electrode in the form of electromagnetic ave toward the level surface, where it is partly reflected and the reflected component is returned to the receiving module of the electronics. The electronics measures the ime of flight of electromagnetic wave and the instant distance to the surface level is calculated. According to the level height, the level meter output is set and the measured value is displayed on the display. Radar level meters are resistant against changes in the atmosphere (pressure, temperature, dust, steam) and to changes in medium parameters (change in dielectric constant, conductivity). Without electrode, the electrode is made by customer (only variant 10 or 30) and connected to the electrode junction by M8 thread. Uncoated stainless steel rod electrode, for level measurement liquids and bulk solid materials (water, water solutions, emulsion, oils, diesel, flour, sand, granulates, etc.). Maximum electrode length 8 m. Fully coated stainless steel rod electrode (PFA Teflon®), for level measurement of aggressive liquids and very pure liquids. Maximum electrode length 2 m. Fully coated stainless steel rod electrode (FEP Teflon®), for level measurement of aggressive liquids and drinks. Maximum electrode length 2 m. Uncoated stainless steel rod electrode with reference tube, for accurate level measurement of liquids in cramped spaces. Maximum electrode length 3 m. Uncoated stainless steel rope electrode and weight, for level measurement of liquids and bulk solid materials (water, grains, sand, flour, cement, etc.) in higher silos, vessels, reservoirs. Maximum electrode length 40 m. Fully coated stainless steel rope electrode and coated weight, for level measurement of aggressive liquids and very pure liquids. Maximum electrode length 12 m. Uncoated stainless steel rope electrode with anchorage, for level measurement of bulk solid materials (grains, flour, cement, etc.) in higher silos, vessels. Maximum electrode length 40 m.

RADAR LEVEL METERS Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments variant GRLM-70 with protective conductor High temperature performance GRLM–70_T

RADAR LEVEL METERS TECHNICAL SPECIFICATIONS - LEVEL METER Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments Dead zone 2) - for measur. sensitivity - low, medium, user (1-4) - high, user (5) - user (6, 7) - user (8) Electrical parameters for variants Xi (XiT) – max. internal values Measurement sensitivity (8 degrees) low (1) medium (3) high (5) user (1-8) Failure indication (echo loss, internal failure) Internal resistance / Electric strength (Electrode - Housing) Coupling capacity / Electric strength (Housing - Supply leads) Maximal current output load...

RADAR LEVEL METERS LEVEL USED MATERIALS SENSOR PART STANDARD MATERIAL aluminium with powder coating aluminium with powder coating Housing with thread St. Steel W. Nr. 1.4571 (AISI 316 Ti) St. Steel W. Nr. 1.4301 (AISI 304) St. Steel W. Nr. 1.4404 (AISI 316 L) Electrode coating Reference tube Weight coating Display module Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments Performance for non-explosive areas High temperature performance for non-Ex areas (max. 200°C) Performance for explosive areas (gases or vapour II 1/2 G Ex ia IIB T6 Ga/Gb with JBIP...

RADAR LEVEL METERS TEMPERATURE AND PRESSURE RESISTIVITY (PERFORMANCE N, XI) Variants Performance Max. operation pressure for temp. tp to 30°C Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments Note: For correct function of the level meter must not be exceeded any of the temperature range (tp, tm or ta). MAXIMAL TEMPERATURES FOR PERFORMANCE xi(xit) CATEGORY 1/2G temp. class The maximum allowable temperature of the medium, process connection and ambient temperature depends in GRLM-70Xi (XiT) at the desired temperature class (see tab. maximum temperatures...

RADAR LEVEL METERS INSTALLATION Install the level meter into the upper lid of the tank or reservoir using a welding flange or fastering nut. The min. distance to install the level meter into a lid or a ceiling of a tank from the metal tank wall is 300 mm and from the non-metal tank wall is 500 mm (except GRLM-70_-20). If installed in an open channel (sumps, reservoirs, etc.), install the level meter as closest as you can to the maximum level expected. Rope electrode level meter must untangle and then can be inserted into the tank. In case any visible defects are discovered, the manufacturer or...

RADAR LEVEL METERS Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments Measurement sensitivity Fig. 3: Level meter dead zone with rod electrode The end of the socket or the welding flange must not have an extension into the tank in Fig. 6. Fig. 6: Incorrect welding flange mounting to the tank Valid for all types except GRLM-70_20 Fig. 4: Level meter dead zone with rope electrode Do not install the level meter in or above the filling stream. The inflowing product can influence the measurement of the level meter. OUTSIDE THE INFLUENCE OF FILLING Fig. 11:...