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Novus NP785-05 Instruction Manual Download Page 24

 

NOVUS AUTOMATION 

 

24/25

 

** Line pressure:

 The maximum pressure that can be applied simultaneously to both pressure ports of the sensor without causing permanent damage and without 

applying differential pressure. 

*** Full Scale (F.S.):

 Under reference conditions: Ambient 23 °C ± 3°C, 24 V supply, 250 

Ω

 load. Vertical mounting. Line pressure: 0 mbar when applying Auto-Zero. 

****

 With 0s filter. 

*****

 The resolution shown corresponds to the digital values read from registers 0 to 5 and is lower than the sensor resolution due to the limitation of decimal places. 

The digital values read from registers 6 to 11 have the same resolution as the sensor. 

 

Technical specifications 

 

 

Summary of Contents for NP785-05

Page 1: ...NOVUS AUTOMATION 1 25 NP785 Ultra Low Differential Pressure Transmitter INSTRUCTION MANUAL V 2 0x Recommended for devices with firmware version V 2 0x and higher ...

Page 2: ... 9 4 2 6 DIAGNOSTIC LED 9 5 SETTINGS 10 5 1 GENERAL SETTINGS 10 5 2 ALARM SETTINGS 10 5 3 ANALOG OUTPUT CONFIGURATION 11 6 USB INTERFACE 12 7 SERIAL COMMUNICATION 13 7 1 REGISTERS TABLE 13 8 NXPERIENCE SOFTWARE 17 8 1 INSTALLING NXPERIENCE 17 8 2 RUNNING NXPERIENCE 17 8 3 CONFIGURING WITH NXPERIENCE 17 8 3 1 GENERAL PARAMETERS 18 8 3 2 INPUT PARAMETERS 19 8 3 3 OUTPUT PARAMETERS 19 8 3 3 1 RETRANS...

Page 3: ... installing and operating the device CAUTION OR HAZARD Risk of electric shock ATTENTION Material sensitive to static charge Check precautions before handling All safety recommendations appearing in this manual must be followed to ensure personal safety and prevent damage to the instrument or system If the instrument is used in a manner other than that specified in this manual the device s safety p...

Page 4: ... configuration of the alarm condition adjustable setpoints and custom timing among other functions Its transmission output can be configured to operate in the 0 10 V and 4 20 mA standards with adjustable range within the sensor limits and has adjustable behavior options in case of sensor error NXperience software offers a quick and intuitive way to configure of all device features It is also possi...

Page 5: ... mbar Model Minimum Pressure Extended Range 3 13 Minimum Pressure Extended Range 1 25 Minimum Pressure Maximum Pressure Maximum Pressure Extended Range 103 13 Unity Standard Configuration 50 Pa 0 531 0 513 0 500 0 500 0 531 mbar 7 97 7 69 7 50 7 50 7 97 mpsi 0 213 0 205 0 200 0 200 0 213 inH2O 5 42 5 23 5 10 5 10 5 42 mmH2O 53 1 51 3 50 0 50 0 53 1 Pa 100 Pa 1 063 1 025 1 000 1 000 1 063 mbar 15 9...

Page 6: ...1000 1000 1062 60 mpsi 29 753 28 700 28 28 29 753 inH2O 743 82 717 50 700 700 743 82 mmH2O 7438 2 7175 0 7000 7000 7438 2 Pa 400 mbar 425 040 410 000 400 400 425 040 mbar 6163 08 5945 00 5800 5800 6163 08 mpsi 170 016 164 000 160 160 170 016 inH2O 4250 40 4100 00 4000 4000 4250 40 mmH2O 42504 0 41000 0 40000 40000 42504 0 Pa 1000 mbar 1062 600 1025 000 1000 1000 1062 600 mbar 15939 00 15375 00 150...

Page 7: ...talled above the point to be measured The extension of the hoses does not affect the device accuracy Very long hoses however can result in measurement delays Hoses should not be bent and sharp curves should not be taken Such actions may result in airflow interruption and possible sensor reading blockage Figure 3 Hose handling The hose does not come with the device Overpressure Excessive pressure w...

Page 8: ... ensure total protection Grounding helps limit the effects of noise due to electromagnetic interference EMI Run the grounding connection by using the grounding bolt and the grounding plane before turning on the device 4 2 2 SPECIAL PRECAUTION Because it is an electronic module the device needs some care when handling Due to the risk of damage caused by static electricity and may occur if the elect...

Page 9: ... for more than 2 seconds If the pressure read from the sensor is within the allowable range see Table 10 the sensor reading will be reset to zero You can also perform this function through the NXperience software see Input Parameters section of the NXperience Software chapter For more information about the Auto Zero function see General Settings chapter You can also define in the software whether ...

Page 10: ...ou can configure the alarm operation mode high and low setpoints hysteresis value status transition timers error condition and initial blocking Alarm configuration can be performed through the NXperience software see Output Parameter section allowing different operation modes Off No alarm situation is active Sensor Error While there is some error reading the sensor the alarm output will remain on ...

Page 11: ...3 6 mA 21 0 mA Minimum Limit 3 6 mA Sensor error 21 0 mA Maximum Limit 21 0 mA Available starting with firmware version 1 20 and software version 2 0 6 02 Behavior of the analog output in case of sensor failure The excursion of the electric signal respects the values set in the configuration of the lower and upper transmission limits which allows customizing the differential pressure range The fac...

Page 12: ...cation manual and its supervision software documentation to perform MONITORING Follow the procedure below to use the device USB communication Download NXperience from our website and install it on your computer see NXperience Software chapter The USB drivers required for communication will be installed along with the software Connect the USB cable between the device and the computer The device doe...

Page 13: ...pressure in floating point RO Depends on model and unit of measure selected 9 HR_F_PRESS_MIN_H 10 HR_ F_PRESS_MAX Maximum value of differential pressure in floating point RO Depends on model and unit of measure selected 11 HR_F_PRESS_MAX_H Maximum and minimum values according to Table 01 The value of the registers should be interpreted as little indian with byte inversion Output registers ANALOG O...

Page 14: ...ing RW 0 1 0 184 HR_A1HY_IN Alarm hysteresis input RW 0 20 of the maximum value 0 185 HR_A1HY_IN_HI 186 HR_A1HY Alarm hysteresis RO 0 20 of the maximum value 0 187 HR_A1HY_H 188 HR_A1T1 Alarm ON time RW 0 6500 0 189 HR_A1T2 Alarm OFF time RW 0 6500 0 190 HR_A1IERR Defines alarm status in case of sensor failure RW 0 1 0 191 HR_A1SPHI Alarm High Setpoint RO Depends on model and unit of measure selec...

Page 15: ...ends on model and unit of measure selected 160 HR_FORCE_PRESS_HIGH 161 HR_RESET_MIN_MAX Reset of all min and max RW 0 1 0 Maximum and minimum values according to Table 01 Force and minimum and maximum registers DEVICE TAG REGISTERS Address Register Description Type 166 HR_PRODUCT_TAG01 Device name string RW ASCII CARACTER 2 CARACTER 1 167 HR_PRODUCT_TAG02 RW ASCII CARACTER 4 CARACTER 3 168 HR_PROD...

Page 16: ...icates that the lower range limit has been exceeded RO 1 Indicates that the upper range limit has been exceeded 2 Diagnostic registers LIMIT REGISTERS Address Register Description Type Minimum Maximum 359 HR_PRESS_HIGH_LIMIT Maximum limit RO Depends on model and unit of measure selected 360 HR_PRESS_HIGH_LIMIT_H RO 361 HR_PRESS_LOW_LIMIT Minimum limit RO Depends on model and unit of measure select...

Page 17: ...a Low Differential Pressure Transmitter to the computer and with the previously installed USB drivers Then you can click on Configure or Diagnostic The Download option is not available for this device model The first time you read a device you must select the device to be connected Simply double click on the desired device or once it is selected click on the Ok button This device will be adopted a...

Page 18: ...n analog output and the alarm output Finalization On this tab you can send the configuration to the device save the configurations in a file update the device firmware and configure a password to protect the device Back Returns to NXperience home screen 8 3 1 GENERAL PARAMETERS By clicking on the icon you can view information of the device being configured and the serial interface configuration pa...

Page 19: ...ossible to automatically adjust the offset To adjust the value you must make sure that the pressure inputs are depressurized and click If the option Resets Offset when performing Auto Zero function has been enabled the device will reset the offset whenever it performs the Auto Zero function If this option is disabled the device will correct the sensor reading error keeping the configured Offset va...

Page 20: ...LARM OUTPUT CONFIGURATION To select the alarm output to be configured you must click on the button and enable it by sliding it to the right Figure 17 Alarm The alarm output may be timed by the Time On and Time Off parameters If the device is configured in the Value Lower than SPLo Value Higher than SPHi Inside the Range or Outside the Range modes the Error Condition parameter allows you to configu...

Page 21: ...reading or directly on the output Figure 19 Diagnostics parameters In the input diagnosis you can view the instantaneous value of the differential pressure and force a value for it To force a value you must type the desired value in the field or slide the slider to the desired value within the pressure range of the model Then press the button In the Auto Zero section you can reset the Offset or en...

Page 22: ...h analog output you can force the transmission of an error value by means of the and buttons These values depend on the mode 0 10 V or 4 20 mA configured for each output The alarm output allows you to force an on and off condition In some cases an alarm output may be on due to an alarm condition Thus it may be desirable to force the status off to identify some fault in the wiring or device configu...

Page 23: ...lution 8 6 bits 9 6 bits 12 bits 13 6 bits 11 6 bits 12 9 bits 13 4 bits Start Up Time 2 s Measurement Update Time 15 ms 50 ms 15 ms Response Time for the RS485 41ms reading 125 registers at 115200 bps Response Time for the analog output 0 95 55 ms 90 ms 55 ms Digital Filter Configurable via software From 0 to 300s Operation Temperature 20 to 70 C 4 to 158 F 5 to 65 C 23 to 149 F 20 to 70 C 4 to 1...

Page 24: ... S Under reference conditions Ambient 23 C 3 C 24 V supply 250 Ω load Vertical mounting Line pressure 0 mbar when applying Auto Zero With 0s filter The resolution shown corresponds to the digital values read from registers 0 to 5 and is lower than the sensor resolution due to the limitation of decimal places The digital values read from registers 6 to 11 have the same resolution as the sensor Tech...

Page 25: ...NOVUS AUTOMATION 25 25 10 WARRANTY Warranty conditions are available on our website www novusautomation com warranty ...

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