Table of Contents
Related Manuals for NIVELCO EasyTREK SCD-300 Series
Summary of Contents for NIVELCO EasyTREK SCD-300 Series
- Page 1 INSTALLATION PROGRAMMING MANUAL edition HiTECH/NIVELCO Process Control Co. 301Oxford Valley Road, Bldg 505, Yardley, PA 19067 Tel: (215) 321-6012 ♦ Fax: (215) 321-6067 www.hitechtech.com E-mail:info@hitechtech.com ♦ ♦ scd3404a0600p_01 1 / 36...
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- Page 3 PRINCIPLES OF ULTRASONIC LEVEL MEASUREMENT Angle of repose: DIST=distance (measured) LEV= level calculated H-DIST) VOL= volume (calculated from LEV) ♦ scd3404a0600p_01 3 / 36...
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Page 4: Table Of Contents
C O N T E N T S 1. INTRODUCTION ................5 6. MAINTENANCE, REPAIR ............33 2. TECHNICAL DATA .................7 7. STORAGE CONDITIONS ............. 33 2.1. G ................7 8. PARAMETER TABLE..............34 ENERAL DATA 2.2. S ................7 PECIAL DATA 2.3. A ................8 CCESSORIES 2.4. -
Page 5: Introduction
A Total beam angle of 5° at –3 dB is a feature of all HiTECH/NIVELCO’s ultrasonic sensors designed for the level measurement of free flowing solids. This uniquely narrow beam angle ensures reliable measurement in narrow silos with uneven side walls or sometimes even in the presence of dusting. - Page 6 HE FOLLOWING TYPES OF APPLICATIONS ARE POSSIBLE DEPENDING ON THE COMMUNICATION AND WHAT THE OUTPUT SIGNAL IS USED FOR Using the unit as a three - or four -wire current transmitter. Normally, we use the analogue (4…20 mA) output signal of the EasyTREK. The application parameters of the device are set through HART communication at installation (right after installation or in a laboratory, prior to installation).
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Page 7: Technical Data
2. TECHNICAL DATA 2.1. G ENERAL DATA Type EasyTREK SCD– 3 EasyTREK SCD– 3 - 8 Ex* Housing material PP+ Aluminium Aluminium Total beam angle (-3dB) 5° Process temperature -22ºF (–30°C) ... + 140ºF (60°C) - 4ºF (–20°C) ... +140ºF (60°C) Process pressure (absolute) 0,07 ... -
Page 8: Accessories
2.3. A CCESSORIES • Installation and Programming Manual • Guaranty Certificate • Manufacturer’s Declaration • EView Light configuration software and description on CD CCESSORIES TO BE ORDERED • Split flange (order code: SFA – 3 5) • EView configuration software CD •... -
Page 9: Dimensions
2.5. D IMENSIONS SCD-330-_ SCD-330-_ Ex SCD-310-_ SCD-310-_ Ex SCD-340-_ SCD-340-_ Ex SCD-33J-_ SCD-33J-_ Ex SCD-31J-_ SCD-31J-_ Ex SCD-34J-_ SCD-34J-_ Ex Ball-joint Housing (view from above) ♦ scd3404a0600p_01 9 / 36... -
Page 10: Installation
3. INSTALLATION OSITIONING Selecting optimal location for the transmitter various considerations should be made. If the measured material is granule (material size > 5 mm) and the tank roof is dome shaped or conical, do not install the transmitter in the centre of the tank/silo. In general the transmitter can be installed on the radius r= (0,3 …... - Page 11 When the entire tilting range of the aiming arm is required, the thickness of the roof can not exceed the values specified below. The EasyTREK can also be mounted on existing (manhole) covers, access lids or for instance on a steel structure lowered into a larger (ex.: 0.5 x 0.5 m) opening on the roof.
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Page 12: Wiring
4. WIRING 4.1. W IRING CONDITIONS Brown • The transmitter is SELV supplied. In the case of DC supply the connection is Supply independent of polarity. Green • Only SELV circuits can be switched on to the relay output. + HART •... - Page 13 Multiple SCD-300 transmitters connected to a MultiCONT process control unit Trial and laboratory programming of the SCD-300 transmitters Output current test Power is supplied from a common external source, the relays are not used. Grey EasyTREK DEVICES White MultiCONT 26 27 28 Brown SELV supply...
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Page 14: Putting Into Operation, Adjusting, Programming
5. PUTTING INTO OPERATION, ADJUSTING, PROGRAMMING 5.1. P UTTING INTO OPERATION After switching on the correctly wired unit the transducer begins to click audibly. In about 20 … 50 s the ECHO LED goes on and a signal between 4 ... 20 mA appears on the current output. -
Page 15: Status Indication Signals In Measuring Mode
- with a HART modem and EView or Eview light configuration software run on a PC - by the HiTECH/NIVELCO made MultiCONT multichannel controller This instruction describes parameters and features behind them but does not deal with technical details for their selection and editing of their values. Compact Disk attached to the transmitter contains detailed information on the Eview configuration software (to install on PC) and its description. -
Page 16: Parameters
5.4. P – D ARAMETERS ESCRIPTION AND PROGRAMMING 5.4.1. M EASUREMENT ONFIGURATION P00: - c b a Application/Engineering Units ATTENTION! Programming of this parameter will result in loading the factory default with the corresponding engineering units. Operating (measurement) mode Free flowing solids level measurement Engineering units (according to “c”) ( according to „c”) Metric... - Page 17 P01: - - b a Measurement Mode Values transmitted by HART protocol, current output and the switching points of the relays will be interpreted into the engineering units of the (measured or calculated) process value corresponding to the programmed measurement mode. On the other hand, the higher the “a” of the programmed parameter value the more (measured or calculated) process values can be transmitted through HART (e.g.
- Page 18 P02: - c b a Calculation units Temperature °C °F This table is interpreted according to P00(c), P01(a) and P02(c) and is irrelevant in case of percentage measurement ( P01(a)= 2 or 4 ) Volume Weight (set also P32 Metric Metric tone lb (pound)
- Page 19 P05: - - - - Minimum measuring distance (Close-end blocking) Basic feature of the ultrasound level meters is their not being able to measure next to the sensor surface. Within this range the measurement can not be interpreted, thus it should be avoided that material level get into this range. By entering a value, higher than the factory default, the minimum measuring range will be extended and fixed to that value.
- Page 20 P06: - - - - Far-end blocking Far-end blocking is the range below the level set in parameter P06. Far-end blocking can be used to avoid disturbing effects of stirrers or heaters at the bottom of the tanks. When the unit detects echoes in this range it gives special signals.
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Page 21: Current Value
5.4.2. C URRENT VALUE P08: - - - - Fixed output current With this step the output current can be set as a fix value, selected between 3,8 mA and 20,5 mA. This function is not operational as per the factory default: 0. -
Page 22: Relay Output
5.4.3. R ELAY OUTPUT P13: - - - - Relay functions Relay functions Also to set: P14, P15 Level If the value selected for controlling the relay Keep at least 2 cm DIFFERENTIAL difference between increases over P14 : relay energises LEVEL CONTROL P14 and P15 Time... -
Page 23: Measurement Optimalization
5.4.4. M EASUREMENT OPTIMALIZATION P20: - - - a Damping This parameter can be used for reduction of unwanted fluctuation of the displayed value and the output. Granules Damping time [s] particle size >2-3 mm particle size < 1-2 mm None For test only Not recommended... - Page 24 P24: - - - a Target tracking speed With this parameter the evaluation can be sped up at the expense of the accuracy. Tracking speed Remark Standard For most applications Fast For fast changing level For very special cases only, as this reduces the maximum measuring range to 50% of the nominal value! The Special measuring window (P25 and P33) is inactive and the EasyTREK will respond practically instantly to any target.
- Page 25 P27: - - - - Level wane rate (emptying speed) [m/h] Use these parameters to provide additional protection against echo loss in applications involving dust during the filling process (powders, dusting granules). Reliability of the measurement can be enhanced by the correct setting of this parameter. These parameters must not be smaller than the fastest possible filling/emptying rate of the actual technology.
- Page 26 Blocking out of object One object in the tank/silo disturbing measurement can be blocked out. Enter distance of the object from the transducer. Use the Echo Map (P70) to read out the precise distance of disturbing objects. FACTORY DEFAULT: 0 P31: Sound velocity at 20°C (m/sec or ft/sec depending on P00(c) ) Use this parameter if the sound velocity in the gases above the measured surface differs largely from that of in air.
- Page 27 ANUAL ECHO SELECTION Weak echo Disturbing echo from the surface Eg.: 5.2 m Eg.: 3.85 m Received signal amplitude (flight time) measuring window Transmitted DIST value (locked on the disturbing echo) (of the disturbing echo) Window signal (comp.) Setting: P33=4.00 (results in shifting the measuring window to 4 m) Window signal (comp.) Measuring Window finds the echo from the surface...
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Page 28: Volume Measurement
5.4.5. V OLUME MEASUREMENT P40: - - ba Tank / silo shape Other parameters to be Tank/silo shape Standing cylindrical tank shape: value of “b” as below bottom P40(b), P41 Standing cylindrical tank/silo with conical bottom P41, P43, P44 Standing rectangular tank/silo (with chute P41, P42, P43, P44, P45 Lying cylindrical tank shape: value of “b”... -
Page 29: Linearisation
5.4.6. L INEARIZATION P47: - - - a Linearization Linearization is the method of assigning requested (calibrated or calculated) level, volume or flow to values measured by the transmitter. It can be used for instance if the sound velocity is not known (LEVEL⇒LEVEL) or in the case of tank with other shape than under 5.4. 5. (LEVEL ⇒ VOLUME). -
Page 30: Informational Parameters
5.4.7. I NFORMATIONAL PARAMETERS P60: - - - - Overall operating hours of the unit (h) P61: - - - - Time elapsed since last switch-on (h) P62: - - - - Operating hours of the relay (h) P63: - - - - Number of switching cycles of the relay (h) P64: - - - - Actual temperature of the transducer (°C/°F) -
Page 31: Test Parameters
P71: - - - - Distance of the of Measuring Window P72 - - - - Amplitude of the selected echo [dB] <0 P73: Position of the selected echo (time) : (ms)[ms] P74: Signal to Noise Ratio Ratio Measurement conditions Over 70 Excellent Between 70 and 50... -
Page 32: Error Codes
Linearization table error: measured Level is higher than See the Section “Linearization” Err15 the last Volume or Flow data-pair Err16 The checksum of the program in the EEPROM is wrong Contact HiTECH at 888 NIVELCO ♦ scd3404a0600p_01 32 / 36... -
Page 33: Maintenance, Repair
(ex.: static build-up) it can be cleaned by pressurised air. Equipment sent back for repair should be cleaned or sterilised by the User. The User must declare that the above has been carried out. Repairs during or beyond the guarantee period are carried out by HiTECH/NIVELCO. 7. STORAGE CONDITIONS Environmental temperature range: - 22ºF (-30) ... - Page 34 8. Parameter TABLE Par. Page Description Value Par. Page Description Value d c b a d c b a Application/Engineering Units Echo loss indication Measurement Mode Blocking out of disturbing object Calculation units – Sound velocity in different gases Maximum Measuring Distance Specific gravity Minimum Measuring Distance –...
- Page 35 Page Description Value Description Value Par. Par. Page d c b a d c b a – TOT2 volume flow totalised – – – – – – Overall operating hours of the unit – Time elapsed after last switch-on – –...
- Page 36 May 2006 reserves the right to change technical specifications without notice. HiTECH/NIVELCO ♦ scd3404a0600p_01 36 / 36...