EasyTREK SP-300, SP-300 Ex two-wire compact ultrasonic level transmitter Manufacturer: NIVELCO Process Control Co. H-1043 Budapest, Dugonics u. 11. Tel.: (36-1) 889-0100 Fax: (36-1) 889-0200 E-mail: sales@nivelco.com www.nivelco.
Device data 2 / 44 BKI 03 ATEX 027X spa3804a0600p_06 Application data Defaults: P06=0 Far endblocking Transmitted range Programmed measurement range Max. distance to be measured (H) Max. measurement range of the device Max. measuringdistance of thedevice (XM) m Programmed: P05>Xm Manual close-end blocking Default: P05=X Automatic close-end blocking Min. measuring distance (Xm) Min.
CONTENTS 1. INTRODUCTION........................................................................5 2. TECHNICAL DATA....................................................................6 2.1 General data....................................................................................6 2.2 Additional data for Ex certified devices ...........................................6 2.3 Special data.....................................................................................7 2.4 Accessories ...............
/ 44 spa3804a0600p_06
Thank you for choosing a NIVELCO instrument. We are sure that you will be satisfied throughout its use. 1. INTRODUCTION X Xm Principle of Operation The ultrasonic level metering technology is based on the principle of measuring the time required for the ultrasound pulses to make a round trip from the sensor to the level to be measured and back. The sensor emits an ultrasonic pulse train and receives the echoes reflected.
2. TECHNICAL DATA 2.1 GENERA L DATA Transducer/enclosure materials Process temperature Ambient temperature Pressure(1) (Absolute) Seals Ingress protection Power supply Accuracy(2) Resolution Outputs Electrical connection Electrical protection (1) (2) (3) Polypropylene (PP),PVDF, PTFE/PP PP, PVDF and PTFE transducers -30°C…+90° -30 °C … +80 °C 0.05 … 0.3 MPa (0.5 … 3 bar) SS316Ti for sensors with stainless steel 0.09 ... 0.11 MPa (0.9 ... 1.
2.3 SPECIAL DATA SPECIAL DATA FOR PP, PVDF AND PTFE TRANSDUCERS (ALSO APPLIES TO Ex MODELS) SP-39 - Type Transducer material Max measuring distance * (XM) [m / ft] Min. measuring distance* (Dead band) [m / ft] Total beam angle (-3dB) Measurement frequency Process connection SP-36- SP-34- PP, PVDF PTFE PP, PVDF SP-38- PTFE PP, PVDF PTFE PP or PVDF PP or PVDF 4/13 3/10 6/20 5/16 8/26 6/20 10/33 15/49 0.2/0.65 0.25//0.82 0.25//0.82 0.25//0.82 0.35/1.2 0.35/1.2 0.35/1.
2.
3. INSTALLATION 3.1 LIQUID LE VEL MEASUREMENT POSITION The ideal position of the EasyTREK is on the radius r = (0.3 … 0.5) R of the (cylindrical) tank / silo. (Take also sonic cone on page 5 into consideration.) SENSOR ALIGNMENT TEMPERATURE The sensor face has to be parallel to the surface of the liquid within 2-3. Make sure that the transmitter is protected against overheating by direct sunshine.
OBSTACLES Make sure that no objects (cooling pipes, bracing members, thermometers etc.) protrude into the sensing cone of the ultrasonic beam. Remark: EasyTREK programming allows one fixed object that would otherwise disturb the measurement to be blocked out. (see P29 of programming). WIND Intensive air (gas) movements in the vicinity of the ultrasonic cone is to be avoided. A strong draft of wind may "blow away" the ultrasound. Devices with lower measuring frequency (40, 20 kHz) are recommended.
3.2 OPEN C HANNEL FLOW MEASUREMENT The unit is suitable for open channel flow measurement with the constructive works listed in 5.3.8. For ultimate accuracy, install the sensor as close as possible above the expected maximum water level (see minimum measuring range). Install the unit in a place defined by the characteristics of the metering channel along the longitudinal axis of the flume or weir. In case of Parshall flumes supplied by NIVELCO the location of the sensor is marked.
5. PUTTING INTO OPERATION 5.1. USAGE Subsequent to powering the correctly wired device would start to tick and after 10 - 20 s ECHO LED go on and 4 ... 20 mA signal appears on the current output. Measurement will be according to the factory setting. The factory setting is throughout apt to check proper working and to perform simple measurement tasks but features residing in the unit can only be utilised by adjusting the EasyTREK to the application by programming.
5.2. SAFETY REGULATION FOR THE EX APPROVED UNITS Diameter of the cable should match the cable conduit. The cable outside the unit should be fixed so that it should be free of loading. The terminal box should be selected in accordance with the electrical class of the area. Transmitter can only be powered by certified intrinsically safe current loop.
5.3. PROGRAMMING The HART interface of the EasyTREK provides for access to the whole parameter set and possibility of their programming. Parameter set can be reached in two different ways: by the use of the - EView software run on the PC connected through HART modem to the loop or - Nivelco made MultiCONT multi-channel process control unit. Since these access methods differ in their form and handling present manual does not review them.
Measurement Mode FACTORY DEFAULT: 11 Parameter value „a” will determine the basic measurement value that will be transmitted. Subsequently values for the relays are also relating to these quantities.
A H DIST P11 P10 B 0 VOL fP40…P45(H-DIST) Transmitted value Parameters to set P00 P01(a) = P02(b) P04 = P05 ≥ P40…P45 A: B: C: D: 16 / 44 BKI 03 ATEX 027X spa3804a0600p_06 3 H Xm C VOL D 100 0 VOL%= VOL * P11 P10 P10 HX m P00 P01(a) = P02(b) P04 = P05 ≥ P10 = P11 = P40…P45 Shortest measurable distance Volume (content) pertaining to the greatest measurable level Whole value of the vessel diagram valid for the default value of P10 P11 4 H Xm X 0% X100% VOL% [%]
P02: - c b a Calculation units FACTORY DEFAULT: 000 a 0 1 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 )] b 0 1 P04 - - - - Volume Metric m3 litre US ft3 gallon Weight (set also P32) Metric US lb (pound) tons tonnes Volume flow Metric US m3/time ft3/time litre/time gallon/time c Time 0 s Attention! 1 min EasyTREK is a level transmitter.
P05: - - - - Minimum measuring distance (Dead zone - Close-end blocking) FACTORY DEFAULT: Xm as per chart The range, beginning with the sensor’s surface, within which (due to the physical restraint of the ultrasound measurement system) measurement can not be made, is called the dead zone. The EasyTREK will not accept any echo within the blocking distance set here.
below SUB 0 (7/8 of P06) the ERROR CODE 10 will be transmitted via HART H P06=X the value of P06 current output is according to the value of the far-end blocking and further X/8 A.) Measuring level or content Level sinking below SUB 0 Far-end blocking is the range below the level set in parameter P06. The far-end blocking can be used to avoid disturbing effect of stirrer or heaters at the bottom of the tanks. Detecting echoes in this range the unit provides special signals.
5.3.2. CURRENT OUTPUT P08: - - - - Fixed current output FACTORY DEFAULT: 0 By this step the output current can be set for a fix value selected from between 3.8 mA and 20.5 mA. This function is not operational as per the factory default: 0. Attention: fixing output current will make settings in P10, P11, P12 and P19 irrelevant.
5.3.3. RELAY OUTPUT P13: - - - a a 0 1 2 3 Relay function Relay function Level DIFFERENTIAL LEVEL CONTROL (Hysteresis control) Relay is energised if the measured or calculated value exceeds the value set in P14 Relay Relay is de-energised if the measured or calculated value descends under the value set C2 C1 in P15 Relay is energised in case of Echo Loss Relay is de-energised in case of Echo Loss COUNTER Used for open channel flow metering. A 140 msec pulse is generated every 1, 10, 100, 1.000 or 10.
5.3.4. DIGITAL COMMUNICATION P19: - - - a Short (HART) address of the unit These addresses with 0 … 15 are, in accordance with the HART standard, for distinguishing units in the same loop. Address: 0 current output of 4 … 20 ma operational Address: 1 … 15 current output is fixed to 4 mA. FACTORY DEFAULT: 2 5.3.5. MEASUREMENT OPTIMISATION P20: - - - a Damping FACTORY DEFAULT: 5 This parameter can be used to reduce unwanted fluctuation of the display and output.
P25: - - - a Selection of Echo within the measuring window FACTORY DEFAULT: 0 A so-called measuring window is formed around the echo signal. The position of this measuring window determines the flight time for calculation of the distance to the target. (the picture below can be seen on the test oscilloscope) Received signal amplitude Echo 1. Echo 2. t t Some applications involve multiple (target + disturbing) echoes even within the measuring window.
P28 - - - a Echo loss indication a FACTORY DEFAULT: 0 Echo loss indication Remark During short echo-loss (for the period of twice the time set in P20) analogue output will hold last value. After this period the current value according to the setting in P12 and via HART ERROR CODE 2 will be transmitted.
P29 - - - - Blocking out of disturbing object FACTORY DEFAULT: 0 One fixed object in the tank, disturbing the measurement, can be blocked out. By the use of the Echo Map (P70) the precise distance of disturbing object can be read out. This value should be entered in this parameter.
5.3.6. DATA LOGGER The logger of the device can store 12288 events. The registry is in a non-volatile (FLASH) memory, so the registry will retain its contents even in case of a power failure. The on-board clock of the device is protected against short power-outs, and keeps working for at least 15 days after the device is switched off. The battery protecting the clock needs at least two hours to be recharged. The logger operates in two basic ways.
P34: - cba Logging mode a 0 1 2 3 4 Operating mode No logging Linear logging Event-controlled logging when the primary value changes Event-controlled logging when the primary value changes Event-controlled logging when the primary value gets out of range b 0 1 2 3 Logging of errors and warnings (a>0) No logging Logging of all errors and warnings Logging of errors only Logging of NoEcho only c 0 1 Logging of changes in status (a>0) No logging Logging of change in status Parameters to be programmed P35
P35-36: Log value 1 and log value 2 P34a 0 1 2 Operating mode No logging Linear logging Function of P35 and P36 P35 = 0 P35 <> 0 P36 Event-controlled logging when the primary P35 value changes 3 Event-controlled logging when the primary value changes 4 Event-controlled logging when the primary value gets out of range in any direction FACTORY SETTING: P35 = 0, P36 = 0 28 / 44 BKI 03 ATEX 027X spa3804a0600p_06 One entry after every measurement cycle.
P37: yyyy Real-time clock, year Year setting for date of the on-board clock. (2005) P38: mmdd Real-time clock, month and day Month (mm) and day (dd) setting for date of the on-board clock. P39: HHMM Real-time clock, hour and minute Hour (HH) and minute (MM) setting of the on-board clock. 5.3.6.1 READING DATA OUT FROM THE LOGGER Reading the logger is only possible with digital communication. For this purpose the built-in IrDA communication port can be used.
5.3.7. VOLUME (CONTENT) MEASUREMENT P40: - - ba FACTORY DEFAULT: 00 Tank shape ba b0 01 02 b3 04 Tank shape Standing cylindrical tank shape (value of “b” as below) Standing cylindrical tank with conical bottom Standing rectangular tank (with chute) Lying cylindrical tank shape (value of “b” as bellow) Spherical tank Also to be set P40 (b), P41 P41, P43, P44 P41, P42, P43, P44, P45 P40 (b), P41, P42 P41 Attention! The value „a” determining the shape of the tank should be set first.
5.3.8. OPEN CHANNEL FLOW MEASUREMENT FACTORY DEFAULT: 00 P40: - - b a Devices, formula, data ba 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 Nivelco Parshall channels 00 Type GPA-1P1 Devices, formula, data Formula Qmin [l/s] Q [l/s]= 60.87*h1.552 0.26 GPA-1P2 Q [l/s]= 119.7*h1.553 0.52 GPA-1P3 Q [l/s]= 178.4* h1.555 0.78 GPA-1P4 Q [l/s]= 353.9*h1.558 1.52 GPA-1P5 Q [l/s]= 521.4* h1.558 2.25 GPA-1P6 Q [l/s]= 674.6*h1.556 2.91 GPA-1P7 Q [l/s]= 1014.
P41-45: P40=00 . . FACTORY DEFAULT: 0 Flume/weir dimensions . Nivelco Parshall flumes (GPA1P1 … GPA-1P9) For further details see the Manual of the Parshall flume . . EasyTREK P 46 EasyTREK P40=09 General Parshall flume 0.305 < P42(width) <2.44 A Ql / s 372 P42 h/ 0,3051,569 P42 2.5 < P42 Q[l/s]= K*P42*h1.6 P= 2/3*A P42 [m] 3.05 4.57 6.10 7.62 9.14 15.24 32 / 44 BKI 03 ATEX 027X spa3804a0600p_06 0,026 P K 2.450 2.400 2.370 2.350 2.340 2.
P40= 10 Palmer-Bowlus (D/2) flume Q[m3/s]= f(h1/P41)*P412.5, where h1[m]= h+(P41/10) P41 m P04 D P46 1 P41 2 h D/2 D/10 P40= 11 Palmer-Bowlus (D/3) flume Q[m3/s]= f(h1/P41)*P412.5, where h1[m]= h+(P41/10) P04 P41 m D P46 1 2 P41 h D/3 D/10 P40= 12 Palmer-Bowlus (rectangular) flume Q[m3/s]= C*P42*h1.
P40= 13 15cm Khafagi Venturi flume Q [m3/s] = 1.744 P42 h1.5 + 0.091 h2.5 P42 P42 m h [m] EasyTREK EasyTREK P46 h P40= 14 P40=14 Bottom step weir 0.0005 < Q [m3/s] < 1 0.3 < P42 [m] < 15 P42 P46 0.1 < h [m] < 10 Q [m3/s]= 5.073 P42 h1.5 h Accuracy: 10% P40= 15 Suppressed rectangular or BAZIN weir 0.001 < Q [m3/s] < 5 0.15 < P41 [m] < 0.8 P40=15 P42 P46 0.15 < P42 [m] < 3 0.015 < h [m] < 0.8 Q [m3/s] =1.77738(1+0.1378h/P41) P42 (h+0.0012)1.
P40= 16 Trapezoidal weir 0.0032 < Q [m3/s] < 82 P40=16 20 < P41[°] < 100 P46 0.5 < P42 [m] < 15 0.1 < h [m] < 2 h P04 P42 Q [m3/s] = 1.772 P42 h1.5 + 1.320 tg(P41/2) h2.47 P41 Accuracy: 5% P40= 17 P40=17 Special trapezoidal (4:1) weir 0.0018 < Q [m3/s] < 50 0.3 < P42 [m] < 10 0.1 < h [m] < 2 1 P46 P04 4 h P42 Q [m3/s] = 1.866 P42 h1.5 Accuracy: 3% P40= 18 P40=18 V-notch weir 0.0002 < Q [m3/s] < 1 20 < P42[°] < 100 P46 0.05 < h [m] < 1 Q[m3/s] = 1.320 tg(P42/2) h2.
P40= 19 P40=19 THOMSON (90°-notch) weir 0.0002 < Q [m3/s] < 1 0.05 < h [m] < 1 P46 90 h P04 Q[m3/s] = 1.320 h2.47 Accuracy: 3% P40= 20 P40=20 Circular weir 0.0003 < Q [m3/s] < 25 0.02 < h [m] < 2 Q[m3/s] = m*b D2.5. where b = f (h/D) P46 P04 P41 h m= 0.555+0.041 h/P41+(P41/(0.11 h)) Accuracy: 5% P46 - - - - Distance at Q=0 Distance between sensor surface and the level at which flow starts has to be entered in this parameter.
5.3.9. 32-POINT LINEARISATION P47: - - - a Linearisation FACTORY DEFAULT: 0 Linearisation 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 (LEVELLEVEL) or in the case of tank with other shape than under 6.4 or open channel other than under 6.5 (LEVEL VOLUME or LEVEL FLOW).
5.3.10. INFORMATIONAL PARAMETERS (READ OUT PARAMETERS) P60: - - - - Overall operating hours of the unit (h) P61: - - - - Time elapsed after last switch-on (h) P62: - - - - Operating hours of the relay (h) P63: - - - - Number of switching cycles of the relay P64: - - - - Actual temperature of the transducer (°C/°F) P65: - - - - Broken loop of the thermometer will be indicated by display of the Pt Error message initiated by a signal sent via HART.
5.3.11. ADDITIONAL PARAMETERS OF THE FLOW METERING P76: - - - - Head of flow (LEV) (Read only parameter) The Headwater value can be checked here. This is the “h” value in the formula for flow calculation. P77: - - - - TOT1 volume flow totalised (resettable) P78: - - - - TOT2 volume flow totalised (non-resettable) 5.3.12. SUPPLEMENTARY PARAMETER OF THE LOGGER P79: Free space of logger in percent If the value is 0, the registry has overflown and every new entry will overwrite the oldest one.
6. MAINTENANCE AND REPAIR EasyTREK SP units do not require maintenance on a regular basis. The need for cleaning of the sensor head may occur. Cleaning should be performed by utmost care where scraping or denting of the transducer have to be avoided. Repair under or after the guarantee period should only be carried out by Nivelco. Devices for repair should only be returned duly cleaned and disinfected. 6.
7.
8. PARAMETER TABLE Par. Page Description Value Par.
Par. Page Description Value Par.
9. SOUND VELOCITY VALUES IN DIFFERENT GASES The following table contains the sound velocity values of various gases measured at 20°C. Gases Acetaldehyde Acetylene Ammonia Argon Benzene Carbon dioxide Carbon monoxide Carbon tetrachloride Chlorine Dimethyl ether Ethane Sulphur hexafluoride Formula C2H4O C2H2 NH3 Ar C6H6 CO2 CO CCl4 Cl2 CH3OCH3 C2H6 SF6 Sound Velocity (m/s) 252.8 340.8 429.9 319.1 183.4 268.3 349.2 150.2 212.7 213.4 327.4 137.
