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BA_072_2020-02_10.00  Pressure transmitter PASCAL Ci4 

Page 21/28 

 

6.4.5.1  Setting the damping 

Using an adjustable damping you can eliminate fast pressure changes or peaks from hav-

ing direct influence to the output signal. The set value in seconds corresponds to the time 

constant of an exponential rise. After a sudden pressure change, it takes the damping time 

to reach 63.2% of the actual pressure at the output. After the damping time has elapsed 

three times, 95% of the pressure is reached. 

  

 

Figure 14: Damping effect 

  

The damping affects the current output as well as the displayed pressure value. 

  

6.4.5.2  Setting of the measuring rate 

When shipped, the transmitter is set to a measuring rate of 20 Hz, i.e. 20 times per second 

the pressure is measured and the current is calculated and imprinted in the current loop. 

When a particularly fast measuring rate is required, for instance to detect pressure peaks, 

you can increase the measuring rate to 100 Hz. This can lead to the following restrictions: 

  

  Communication via HART can be disturbed by fast pressure changes. 

  The measuring signal can be noisier. 

  

For this reason, you should only increase the measuring rate to 100 Hz if necessary for the 

application. 
Note: Devices with differential pressure cell (type CI4x4x) run with a fixed measuring rate 

of 50 Hz. For these devices there is no option to set the measuring rate.  

  

Summary of Contents for CI4 Series

Page 1: ...EU Regulations 2 1 4 ATEX Approval 2 2 Transportation and Storage 2 3 Installation and Commissioning 2 3 1 Mechanical Installation 2 3 2 Electrical Connection 3 3 3 Devices with Diaphragm Seal 3 3 4 M...

Page 2: ...the device certifies its compliance with the applicable EU Directives for placing products on the market within the European Union You find the complete EU Declaration of Conformity document no KE_04...

Page 3: ...Pay attention to the following points regarding electrical connections via cable gland and terminal block Do not forget to tighten the cable gland after the electrical connection is finalised Press do...

Page 4: ...and front cover which were screwed onto the remote display housing for shipment Do not forget to connect the cable on the back with the display connector on the CPU module 3 The cable may be shortened...

Page 5: ...nals on the terminal board When you connect a current meter to the Test and Test terminals the current is automatically routed through it Figure 4 Current measurement during operation using test termi...

Page 6: ...y contrast can be adjusted display software version 2 0 5 and above Press and hold the ESC key and use the arrow keys to adapt the contrast The setting is saved and the contrast screen closes as soon...

Page 7: ...Warning Opening pressurized lines might cause severe injuries Danger of severe injuries or damage Relieve the process pressure before attempting to remove the device Shut off the pressure supply for...

Page 8: ...n of the device The gen eral functionality of the buttons is identical in all operating modes Figure 7 Control elements If you press and hold the up or down button it will automatically be triggered m...

Page 9: ...ly measured value is shown If the measured value is larger than the displayable number due to setting a fixed decimal point or an inappropriate unit the largest displayable number is shown flashing In...

Page 10: ...bination to unlock the menue again The menue cannot be un locked with the key combination if the hardware DIP switch is activated 6 2 3 Icons indicating device status In the top right corner of the di...

Page 11: ...i mum size best readability from a dis tance One additional value can also be shown Table 4 Display layouts You can define what information shall be shown in the layout s placeholders You can select t...

Page 12: ...value display by pressing and holding the ESC button for at least one second Figure 9 The Operating menue In long menues and selection lists a scroll bar on the left side shows the position of the cu...

Page 13: ...is not saved With the OK button the selected value is saved Saving the value is confirmed with an in formation window and the new value is shown in view mode With ESC you leave the view mode and retu...

Page 14: ...rameter limit is reached The value is then set to the parameter limit You can set negative numbers by decreasing the value below zero When you press the ESC button you can cancel the entry at any time...

Page 15: ...ion System Device data and function such as factory reset Tabelle 6 The main menue 6 4 2 Quick Setup menue In Quick Setup basic configuration options are combined to make it possible to quickly config...

Page 16: ...ero point correction requires a non pressurized pressure port e g during calibration in the lab When executing this function the applied pressure will be interpreted as zero bar relative pressure The...

Page 17: ...ent should be performed as close as possible to the lower range value and upper range value of the measurement ranges 6 4 3 4 Current adjustment You can use the current adjustment if the reading at th...

Page 18: ...en mode Configuration of the screen layout and content see 6 2 4 Decimal point Select setting of decimal point to determine number of decimal places Backlight Switch backlight on off Table 10 Display...

Page 19: ...si Pound force per square inch 1 psi 68 9 mbar atm Atmospheric pressure 1 atm 1013 mbar mmH2O Millimetre water column 1 mmH2O 0 0981 mbar mH2O Metre water column 1 mH2O 98 1 mbar inH2O Inch water colu...

Page 20: ...ent output menue Menue entry Description Damping Setting the damping of the output signal Measuring rate Setting the measuring rate 20 or 100 Hz except for devices with differential pressure cell type...

Page 21: ...pressure value 6 4 5 2 Setting of the measuring rate When shipped the transmitter is set to a measuring rate of 20 Hz i e 20 times per second the pressure is measured and the current is calculated and...

Page 22: ...tion of the table function With the table function you can realise any output function E g you can convert the fill height to the fill quantity depending on the tank shape You can use up to 64 interpo...

Page 23: ...the lower limit between 3 8 and 4 mA and for the upper limit be tween 20 and 21 mA 6 4 6 Diagnosis menue In this menue you can view and configure various diagnostic information The following diagnost...

Page 24: ...ainte nance need is indicated by an icon in the display see 6 2 3 and if necessary the HART protocol When the maintenance timer has expired the counter continues into the minus range thus the degree t...

Page 25: ...3 will not automatically activate the constant current mode This must be done under the menue Current mode see 6 4 8 2 6 4 8 2 Current mode The current mode determines whether the output current of th...

Page 26: ...display module You can transfer the data back to the device or to another device Transferring a configu ration to another device requires a compatible target device The same nominal range is not neces...

Page 27: ...BA_072_2020 02_10 00 Pressure transmitter PASCAL Ci4 Page 27 28...

Page 28: ...BA_072_2020 02_10 00 Pressure transmitter PASCAL Ci4 Page 28 28 6 4 10 1 1 1Overview with menue tree and device functions...

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