CS420-L and CS425-L Druck’s Models PDCR 1830 and 1230 Pressure Transducers Revision: 12/07 C o p y r i g h t © 2 0 0 0 - 2 0 0 7 C a m p b e l l S c i e n t i f i c , I n c .
The CS420-L and CS425-L Pressure Transducers are manufactured by Druck Incorporated. Druck’s conditions of sale and return policy apply to these items. Products may not be returned without prior authorization. To obtain an RMA number contact Druck, Inc., phone (203) 746-0400. NOTE: if the product has been exposed to hazardous media, it must be fully decontaminated and neutralized prior to return to Druck.
CS420-L/CS425-L (Druck PDCR Series) Table of Contents PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat® bookmarks tab for links to specific sections. 1. General Information.....................................................1 2. Specifications ..............................................................1 3. Installation....................................................................2 3.1 3.2 3.3 3.4 Vent Tubes.................................
CS420-L/CS425-L Table of Contents 7. Edlog Program Examples .........................................11 7.1 CR10(X), CR510, and CR500 Examples............................................... 11 7.1.1 Instruction 6 (4-Wire Full Bridge Measurement)......................... 11 7.1.2 Instruction 9 (6-Wire Full Bridge w/Excitation).......................... 12 7.2 CR23X and 21X Examples .................................................................... 13 7.2.1 Instruction 6 (4-Wire Full Bridge Measurement)...
CS420-L and CS425-L Pressure Transducers This manual describes using the CS420-L and CS425-L pressure transducers with Campbell Scientific’s CR800, CR850, CR1000, CR3000, CR5000, CR10(X), CR23X, CR510, CR500, and 21X dataloggers. Information provided in the manual includes datalogger-to-sensor connection, datalogger programming, use of multiplexers in the system, and maintenance requirements. 1. General Information The CS420-L is Druck’s model PDCR 1830-8388; the CS425-L is model PDCR 1230-8388.
CS420-L and CS425-L Pressure Transducers 3. Installation 3.1 Vent Tubes A vent tube incorporated in the cable vents the sensor diaphragm to the atmosphere. This eliminates the need to compensate the water level measurement for changes in barometric pressure. To prevent water vapor from entering the inner cavity of the sensor, the transducers are typically shipped with the vent tubes sealed. Before operation, visually confirm the vent tube is open.
CS420-L and CS425-L Pressure Transducers does not use the orange and black wires and the ends of each of these wires should be taped to prevent shorting. 4.1 Six-Wire Configuration Datalogger CS420-L/CS425-L Excitation AG (Analog Ground) HI (Analog) LO (Analog) HI (Analog) LO (Analog) G (Ground) Red (Supply Positive) White (Supply Negative) Orange (Excitation Monitor +) Black (Excitation Monitor -) Yellow (Signal Output +) Blue (Signal Output -) Clear (Shield) 4.
CS420-L and CS425-L Pressure Transducers NOTE The sections that immediately follow are for CRBasic, Edlog, and Keyboard/Display users. Short Cut users can jump ahead to the Maintenance section (page 21). 5.2 Using CRBasic, Edlog, or the Keyboard/Display For dataloggers programmed with CRBasic use the BrFull instruction to make a four-wire measurement and BrFull6W to make a six wired measurement.
CS420-L and CS425-L Pressure Transducers 5.2.2 Calculating the Offset The offset is calculated with the following procedure: NOTE 1. Program the datalogger using the calculated multiplier and an offset of 0 in either a 6-wire full bridge instruction (BrFull6W in CRBasic or Instruction 9 in Edlog) or a 4-wire full bridge instruction (BrFull in CRBasic or Instruction 6 in Edlog). Set the execution interval to one second. 2.
CS420-L and CS425-L Pressure Transducers or output mV = (sensitivity mV)∗ (excitation V) ( sup ply voltage V) The value and units for the sensitivity are listed on Druck’s calibration certificate. NOTE If the pressure range of the sensor is exceeded, the output voltage of the transducer could exceed the input range of the datalogger. For CRBasic dataloggers, NAN (not a number) indicates an overrange.
CS420-L and CS425-L Pressure Transducers adjustment factor = input range output = 50 mV 55 mV = .909 The excitation adjusted to output 50 mV is: adjusted excitation = (original excitation)*(calculated adjustment factor) = (5000 mV)*(.909) = 4545 mV Use 4545 mV to excite the sensor instead of 5000 mV within either the BrFull or BrFull6W instruction. 6. CRBasic Program Examples 6.1 Wiring for the Program Examples 6.1.
CS420-L and CS425-L Pressure Transducers 6.2 CR800, CR850, and CR1000 Programs 6.2.1 BrFull Instruction (4-Wire Full Bridge Measurement) 'CR1000, CR800, CR850 '4wire configuration Public Depth_Ft DataTable (WtrData,1,-1) DataInterval (0,15,Min,10) Sample (1,Depth_Ft,FP2) EndTable BeginProg Scan (15,Min,0,0) BrFull (Depth_Ft,1,mV2500,1,Vx1,1,2500,True ,True ,0,250,2.3529,-0.49) CallTable WtrData NextScan EndProg 6.2.
CS420-L and CS425-L Pressure Transducers 6.3 CR3000 Programs 6.3.1 BrFull Instruction (4-Wire Full Bridge Measurement) 'CR3000 '4 Wire configuration Public Depth_Ft DataTable (WtrData,1,-1) DataInterval (0,15,Min,10) Sample (1,Depth_Ft,FP2) EndTable BeginProg Scan (15,Min,0,0) BrFull (Depth_Ft,1,mv5000,1,Vx1,1,5000,True ,True ,0,250,2.3529,-0.49) CallTable WtrData NextScan EndProg 6.3.
CS420-L and CS425-L Pressure Transducers 6.4 CR5000 Programs 6.4.1 BrFull Instruction (4-Wire Full Bridge Measurement) 'CR5000 '4 Wire configuration Public Depth_Ft DataTable (WtrData,1,-1) DataInterval (0,15,Min,10) Sample (1,Depth_Ft,FP2) EndTable BeginProg Scan (15,Min,0,0) BrFull (Depth_Ft,1,mV20,1,Vx1,1,5000,True ,True,0,250,2.3529,-0.49) CallTable WtrData NextScan EndProg 6.4.
CS420-L and CS425-L Pressure Transducers 7. Edlog Program Examples 7.1 CR10(X), CR510, and CR500 Examples 7.1.1 Instruction 6 (4-Wire Full Bridge Measurement) 7.1.1.1 Wiring Datalogger Excitation Input Input An. Ground CS420-L/CS425-L E1 H1 L1 AG G Red (Supply +) Yellow (Output +) Blue (Output -) White (Supply -) Clear (Shield) The orange and black wires are not used and the ends of these wires should be taped to prevent shorting. 7.1.1.2 Edlog Program ; Measure one 4-wire DRUCK Sensor.
CS420-L and CS425-L Pressure Transducers 7.1.2 Instruction 9 (6-Wire Full Bridge w/Excitation) 7.1.2.1 Wiring Datalogger Excitation Input Input Input Input An. Ground CS420-L/CS425-L E1 H1 L1 H2 L2 AG G Red (Supply +) Orange (Monitor +) Black (Monitor -) Yellow (Output +) Blue (Output -) White (Supply -) Clear (Shield) 7.1.2.2 Edlog Program ; Measure one 6-wire DRUCK Sensor. * Table 1 Programs 01: 5 Sec.
CS420-L and CS425-L Pressure Transducers 7.2 CR23X and 21X Examples 7.2.1 Instruction 6 (4-Wire Full Bridge Measurement) 7.2.1.1 Wiring Datalogger Excitation Input Input CS420-L/CS425-L E1 H1 L1 G G Red (Supply +) Yellow (Output +) Blue (Output -) White (Supply -) Clear (Shield) The orange and black wires are not used and the ends of these wires should be taped to prevent shorting. 7.2.1.2 Edlog Program ; Measure one 4-wire DRUCK Sensor.
CS420-L and CS425-L Pressure Transducers 7.2.2 Instruction 9 (6-Wire Full Bridge w/Excitation) 7.2.2.1 Wiring Datalogger Excitation Input Input Input Input CS420-L/CS425-L E1 H1 L1 H2 L2 G G Red (Supply +) Orange (Monitor +) Black (Monitor -) Yellow (Output +) Blue (Output -) White (Supply -) Clear (Shield) 7.2.2.2 Edlog Program ; Measure one 6-wire DRUCK Sensor.
CS420-L and CS425-L Pressure Transducers 8. Using Multiplexers Multiplexers increase the number of transducers a single datalogger can measure. NOTE The CR500 and CR510 dataloggers do not support the use of multiplexers. 8.1 Examples The dataloggers in the examples measure four Druck pressure transducers that are connected to an AM16/32A multiplexer. Excitation is supplied to the sensor from the datalogger wiring panel.
CS420-L and CS425-L Pressure Transducers 8.1.2 Multiplexer Connection Multiplexer Datalogger COM H1 COM L1 COM H2 COM L2 12V G RES CLK Shield H1 L1 H2 L2 12V G C1 C2 G 8.1.3 CRBasic Multiplexer Examples 8.1.3.1 CR800, CR850, and CR1000 Program Although the following program was written for the CR1000, the CR800 and CR850 could use the same program. 'CR1000 'For use with an AM16/32 in a 6 wire configuration, with four sensors.
CS420-L and CS425-L Pressure Transducers PortSet (1 ,1 )' Activate AM16/32 LoopCount = 1 'Reset loop counter SubScan (0,Sec,4) PulsePort (2 ,10000) 'Switch to next transducer, delay 10000 us before measurement BrFull6W(WellDepth(LoopCount),1,mV2500,mV25,1, Vx1,1, 2500,True,True,0,250,Mult(LoopCount),Offset(LoopCount)) LoopCount = LoopCount + 1 NextSubScan PortSet (1 ,0)' Deactivate AM16/32 CallTable WellData NextScan EndProg 8.1.3.
CS420-L and CS425-L Pressure Transducers 'Switch to next transducer, delay 10000 use before measurement BrFull6W(WellDepth(LoopCount),1,mv5000,mV50,1,Vx1, 1,5000,True ,True,0,250,Mult(LoopCount),Offset(LoopCount)) LoopCount = LoopCount + 1 NextSubScan PortSet (1 ,0)' Deactivate AM16/32 CallTable WellData NextScan EndProg 8.1.3.3 CR5000 Program 'CR5000 'For use with an AM16/32 in a 6 wire configuration, with four sensors.
CS420-L and CS425-L Pressure Transducers LoopCount = LoopCount + 1 NextSubScan PortSet (1 ,0)' Deactivate AM16/32 CallTable WellData NextScan EndProg 8.1.4 Edlog Example The following program is for the CR10(X); a CR23X is programmed similarly. Each sensor has an independent multiplier and offset that must be applied. To determine multiplier (M) and offset, see the Multiplier and Offset sections.
CS420-L and CS425-L Pressure Transducers 6: End (P95) ; Deactivate Multiplexer 7: Do (P86) 1: 51 Set Port 1 Low ; Adjust sensor readings for multiplier and ; offset: 8: Scaling Array (A*Loc + B) (P53) 1: 1 Start Loc [DEPTH_FT] 2: 2.2975 A1 ;Multiplier #1 3: .36781 B1 ;Offset #1 4: 1.0560 A2 ;Multiplier #2 5: .4011 B2 ;Offset #2 6: 3.0001 A3 ;Multiplier #3 7: .2103 B3 ;Offset #3 8: 1.9821 A4 ;Multiplier #4 9: 1.0029 B4 ;Offset #4 ; Record average depth every hour.
CS420-L and CS425-L Pressure Transducers NOTE • Check indicating desiccant or enclosure humidity indicator; service desiccant if necessary • Check battery condition (inspect physical appearance and use a keyboard display or laptop to view the battery voltage) • Check all sensor readings (using keyboard display or laptop); adjust transducer offsets if necessary • Check recent data using keyboard display or laptop • Perform routine maintenance suggested by manufacturers See datalogger manual for m
CS420-L and CS425-L Pressure Transducers To troubleshoot, do the following: 22 • Check your connections to the datalogger. Look for loose or broken wires, and moisture at the points of connection. • Inspect the pressure transducer cable for wear, stress, or other indications of damage. • Check the vent tube for plugging and condensation.
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