DescriptionThe 120M1644 is a bridge-type millivolt output pressure transducer designed for use with the Trendmaster system. The transducer interfaces with the ProTIM-R and ProTIM-C dual channel pressure modules to provide data to System 1 software.

The nominal output of the 120M1644 pressure transducer will be 0 PSI at atmospheric pressure (14.7 PSI). Note that a sealed gauge transducer will output the difference between atmospheric pressure (14.7 PSI) and the pressure at the point on the machine to which it connects. A gauge pressure transducer often has a vent hole in the transducer and will output the pressure difference between the port and vent. The 120M1644 is a sealed gauge transducer for pressure ranges over 150 PSI. For pressure ranges below 150 PSI, the transducer is gauge referenced to minimize error due to variation in ambient pressure. Since gauge transducers have an open vent, they should be protected from ingression of moisture and debris.

 

 

120M1644 proTIM Pressure Sensor andCableDatasheetBently Nevada Machinery Condition Monitoring 121M7245 Rev. A

Specifications Electrical

Full Scale Range

50 PSIG (pounds per square inch), pressure above the local ambient air pressure

500, 2000 PSIS (pounds per square inch), pressure above 14.7 PSI internal reference pressure

Supply Voltage Range

7 to 12 M, 10 mV/V

Note that with a 10 V supply mV output, sensors give 100 mV over the full scale pressure.

 l Output is ratiometric to the supply voltage.

 l Output reduces pro-rata for pressure ranges below 350 mbar(5 psi).

Current Consumption <3 mA

Output Voltage Range

100 mV FS (Full Scale)

Note that the transducer is calibrated at 100 mV full scale with 10 V excitation; the pressure ProTIM modules use 5 V excitation and 50 mV Full Scale

Sensitivity ±3mV (±6% of Full-Scale Range) at atmospheric pressure (14.7 PSI)

Excitation 5 Vdc nominal

Zero Offset ±3mV (±6% of Full-Scale Range) at atmospheric pressure (14.7 PSI)

Absolute Accuracy

±4% FS over compensated temperature range

Common Mode Voltage 30% to 50% of excitation voltage

ImpedanceInput ≥2 kΩOutput ≥3 kΩElectrical Connection M12x1, 4-pin or equivalent

A +ExcitationB +OutC -OutD -Excitation

EnvironmentalTemperatureOperating -20°C to +80°C (-4°F to +176°F)Compensated +20°C to +80°C (-4°F to +176°F)

PressureProof 2X full pressure scale

Burst 3X full pressure scale or 20,000 PSIS, whichever is less

Physical

Port Fitting50 PSIG, 500 PSIS: 1/4 - NPT Male

2000 PSIS: 1/4 – NPT Female Media Compatible with 316 Stainless Steel

Insulation > 50 M @ 50 Vdc @ 22.2 °C (72 °F) and 60% humidity

Mating Cable 120M1648

120M1648 CablesOperating Temperature -40C to +100C (-40F to +221F)

Minimum Bend Radius 25.4 mm (1.0 in).

Construction4-conductor (22 AWG) with foil shield and drain wire (100% coverage), blue PVC outer jacket.

Connectors

ProTIM: Five pin, dual key plug with ½ - 20 UNF internal thread.

Transducer: Four pin, single key receptacle with SST 316 internal thread coupling nut.

Additional Information For more detailed information on connecting a ProTIM to the DSM monitor, please reference the following:

200200 ProTIM-R Module Datasheet (Document 163662)

200250 ProTIM-C Module Datasheet (Document 163663)

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120M1644 proTIM Pressure Sensor and CableDatasheet 121M7245 Rev. A

Compliance and Certifications EMC

Pressure Equipment Directive 97/23/EC

EMC Directive 2004/108/EC

 

Hazardous Area Approvals For the detailed listing of country and product specific approvals, refer to the Approvals Quick Reference Guide (108M1756) available from Bently.com.

IECEx/ATEX Intrinsically Safe 'ia' Group I

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120M1644 proTIM Pressure Sensor and CableDatasheet 121M7245 Rev. A

Ordering InformationFor the detailed listing of country and product specific approvals, refer to the Approvals Quick Reference Guide (108M1756) available from Bently.com.

ProTIM Pressure Sensor Transducer

120M1644 – AAAA

A: Full Scale Range0050 0-50 PSI0500 0-500 PSI2000 0-2000 PSI

Transducer Cables

120M1648-AA

A: Cable Length0 2 2.0 metres (6.6 feet)0 4 4.0 metres (13.1 feet)0 6 6.0 metres (19.7 feet)0 9 9.0 metres (29.5 feet)

Transducers may be rated to higher operating temperatures than the cable that connects the transducer to the ProTIM module.  We do not recommend using the cable above its rated temperature.

Installation GuidelinesFollow all industry accepted standards and safety practices relating to pressurized systems.

Check all fittings and hardware for appropriate pressure ratings.

Use protective devices like pressure limiters or snubbers. if your application needs them.  These protect the transducer and prevent loss of accuracy.  Most protective devices will not affect system accuracy.

Use pipe sealant or Teflon tape to improve sealing if your application requires it.

Avoid installing transducers in locations with excessive vibration if possible.

The transducer has a ¼ NPT fitting. Install the transducer with a minimum of 3-1/2 threads engaged.

Verify that the ambient temperature of the transducer location is within the operating range of the transducer and cable.  The transducer should also operate within its compensated temperature range to provide accurate measurements.

Ensure that the environmental boot covers at least half of the transducer.

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120M1644 proTIM Pressure Sensor and CableDatasheet 121M7245 Rev. A

Graphs and Figures

Figure 1:  120M1644 50 PSIA and 500 PSIS Pressure Transducer Dimensions

Figure 2:  120M1644 2000 PSIS Pressure Transducer Dimensions …

Figure 3:  120M1648 Pressure Cable

120M1644 proTIM Pressure Sensor and CableDatasheet 121M7245 Rev. A

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Bently Nevada, Orbit Logo and System 1 are registered trademarks of Bently Nevada, a Baker Hughes Business, in the United States and other countries. The Baker Hughes logo is a trademark of Baker Hughes Company. All other product and company names are trademarks of their respective holders. Use of the trademarks does not imply any affiliation with or endorsement by the respective holders.

Baker Hughes provides this information on an “as is” basis for general information purposes. Baker Hughes does not make any representation as to the accuracy or completeness of the information and makes no warranties of any kind, specific, implied or oral, to the fullest extent permissible by law, including those of merchantability and fitness for a particular purpose or use. Baker Hughes hereby disclaims any and all liability for any direct, indirect, consequential or special damages, claims for lost profits, or third party claims arising from the use of the information, whether a claim is asserted in contract, tort, or otherwise. Baker Hughes reserves the right to make changes in specifications and features shown herein, or discontinue the product described at any time without notice or obligation. Contact your Baker Hughes representative for the most current information.

The information contained in this document is the property of Baker Hughes and its affiliates; and is subject to change without prior notice. It is being supplied as a service to our customers and may not be altered or its content repackaged without the express written consent of Baker Hughes. This product or associated products may be covered by one or more patents. See Bently.com/legal.

 

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120M1644 proTIM Pressure Sensor and CableDatasheet 121M7245 Rev. A

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