Summary of Contents for mensor CPT6140
- Page 1 Operating Instructions High-Speed Pressure Transducer CPT6140 High-Speed Pressure Transducer CPT6140 PN 0019310001F 10/2018 •...
- Page 2 This Caution symbol indicates danger for the system and material if the respective safety precautions are not taken. Caution This Notice symbol does not indicate safety notices but information for a better understanding of the facts. Notice CPT6140 Operating Instructions...
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Page 3: Table Of Contents
1.4 Mensor Service Plus ........ - Page 4 6.2 CPT6140 Address ........
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Page 5: General Information
Men- sor, this warranty does not apply. The judgment of Mensor will be final as to all matters concerning condition of the product, the cause and nature of a defect, and the necessity or manner of repair. -
Page 6: Software License Agreement
PERFORMANCE OF THE SOFTWARE PROGRAM. 1.4 Mensor Service Plus If you have problems and you don’t find the answer in this manual, contact Mensor at 1.800.984.4200 (USA only) or 1.512.396.4200 for personal assistance, or at any of the contact ad- dresses listed on the rear cover of this manual. -
Page 7: Safety Notices
(printed circuit boards) to prevent static discharge to sensitive electronic components. Avoid excessive overpressure to the transducer. Externally mounted relief valves to provide overpressure protection are available from Mensor as optional devices and are highly recommended for very low pressure trans- ducers. -
Page 8: Product Description
The CPT6140 gives a streaming output at 250Hz from a low hysteresis silicon sensor with electronically compensated pressure linearity over the specified temperature range. Communication with the CPT6140 is over a RS-232 or RS-485 serial bus. - Page 9 Pressure units for each transducer are specified by the customer. Wiring requirements for the serial port are provided in the Installation section and a list of valid commands and responses (Table 6.5.4) is provided in the operation section. CPT6140 Operating Instructions...
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Page 10: Specifications
ISO Guide to the Expression of Uncertainty in Measurement (GUM). The calibration program at Mensor is accredited by the American Association of Laboratory Accreditation (A2LA) as complying with both the ISO/IEC 17025:2005 and the ANSI/NCSL Z540-1- 1994 standards. - Page 11 Communication Interface RS-232 or RS-485 Baud rate 57,600 baud Measuring rate 250 values/s Response time 4 ms for a FS pressure pulse Certificate Calibration Standard: A2LA calibration certificate Option: DKD/DAkkS calibration certificate Approvals and certificates, see website CPT6140 Operating Instructions...
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Page 12: Installation
However, excessive motor or machinery vibration of the mounting surface should be avoided to further ensure stability and accuracy. For the greatest accuracy on transducers with a full scale range of less than 15 psi, set CPT6140 zero while it is oriented in its operational position. CPT6140 Operating Instructions... -
Page 13: Pressure Connections
CPT6140 5.5 Pressure Connections The pressure to be measured is applied to the port labeled P on top of the CPT6140. The reference connection for gauge pressure is made to the port labeled R. On gauge transducers the reference port is normally left open to atmosphere. If the transducer is used in a differential mode, static line pressures may affect the calibration. -
Page 14: Connector J1 Wiring
Power and signals are applied to J1, a 9-pin D-sub male connector. A nominal 12 VDC supply can be used to power the CPT6140 by applying 12 VDC to pin 6 and ground to pin 5. Power consump- tion is maximum 55mA at 12 VDC. The CPT6140 is protected against power input reversal. Com- munication wiring between the host and the CPT6140 is shown in Figures 5.6 and 5.6.3. -
Page 15: Operation
6. Operation Avoid excessive overpressure to the transducer! Externally mounted relief valves to provide overpressure protection are available from Mensor as optional devices, and are highly recommended for very low pressure transducers. Caution User programmable exponential filtering is applied to pressure readings in order to minimize at or near static pressure noise. -
Page 16: Serial Port Configuration
CPT6140. 6.1 Serial Port Configuration Unless otherwise requested by the customer, the CPT6140 serial ports are set at the factory to the default values listed in the following table. Table 6.2 - Serial Port Settings... -
Page 17: Communication Syntax And Command Conventions
After calibration is completed the CPT6140 can be put back into the “burst mode” by sending the mode command with a value of 6. A save must also be sent in order to keep the CPT6140 in mode 6 in case power is cycled. -
Page 18: Commands And Queries
Returns the date of calibration <cr><lf> where nnnnnn is mmddyy. #XDC<sp>nnnnn Loads the date of calibration n<cr> where nnnnnn is mmddyy. #XFL?<cr> X<sp>FL<sp>nn<cr> Returns the filter – it is the per- <lf> centage of old reading added to new reading: 0-99. CPT6140 Operating Instructions... - Page 19 Loads a span correction n<cr> multiplier. #XT?<cr> X<sp>T<sp>C<cr><lf> Returns cal type. #XU?<cr> X<sp>n<cr><lf> Returns pressure unit code. See table 6.4.3. #XZC?<cr> X<sp>ZC<sp>n...n Returns zero correction value <cr><lf> in current units. #XZC<sp>n... Sets zero correction value in n<cr> current units. CPT6140 Operating Instructions...
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Page 20: Pressure Unit Code And Conversion
@ 0°C (3.5% salinity) 2.243611 0.06804596 Bars 0.06894757 mBars 68.94757 mmH2O@4°C 703.0890 cmH2O@4°C 70.30890 mH2O@4°C 0.7030890 mmHg@0°C 51.71508 cmHg@0°C 5.171508 Torr 51.71508 6.894757 6894.757 Dynes/cm2 68947.57 g/cm2 70.30697 kg/cm2 0.07030697 mSW @ 0°C (3.5% salinity) 0.6838528 oz/in2 CPT6140 Operating Instructions... - Page 21 High-Speed Pressure Sensor CPT6140 0.072 % Full Scale microns Hg @ 0°C 51715.08 0.0005 68.94757 0.006894757 CPT6140 Operating Instructions...
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Page 22: Calibration
The temperature should be stable, and within the specified calibration range. In addition, for maximum accuracy, see that the CPT6140 is at rest on a stable platform which is free of vibration and shock, and oriented similar to its final installation attitude. At the factory the CPT6140 is calibrated vertically with the pressure port at the top. - Page 23 High-Speed Pressure Sensor CPT6140 Figure 8.2 - Calibration Setup CPT6140 Operating Instructions...
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Page 24: Pressure Standard
Depending on the specific language used to generate them, these commands may have to be preceded by or enclosed in various symbols for transmission. For this procedure it is assumed that a single CPT6140 is connected to the host computer, and that its assigned address is unknown. -
Page 25: Zero Adjustment
Send: #*PW<cr> Next send the zero offset: #*ZC<sp>–.0023<cr> The new offset of –0.0023 will now be added to all pressure readings of the CPT6140. Send: #*SAVE<cr> to store the new value in non-volatile memory. 6. To check the zero correction: Send: #*?<cr>... -
Page 26: Absolute Zero Offset
2. Use the setup for absolute pressure shown in Figure 8.2. Apply a stable pressure value between 600 mTorr absolute and 20% of the transducer’s span. Measure the reference pressure reading in the native units of the CPT6140. This reading becomes the “true pressure”. 3. Clear the current zero offset from RAM. -
Page 27: Span Adjustment
Then send: #*SC<sp>1.000127<cr> Send: #*SAVE<cr> to store the new value in non-volatile memory. All future pressure readings returned by this CPT6140 will be multiplied by a scale factor of 1.000127 before they are transmitted over the bus. 6. To check the span reading: Send: #*?<cr>... - Page 28 201 Barnes Drive San Marcos, Tx 78666 Tel: 512-396-4200 Fax: 512-396-1820 sales@mensor.com www.mensor.com CPT6140 Operating Instructions PN 0019312001F • 10/2018 WIKA Alexander Wiegand SE & Co. KG Alexander-Wiegand-Straße 30 D-63911 Klingenberg / Germany Tel: +49 93 72/132-5015 Fax: +49 93 72/132-8767 CTSales@wika.de...
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