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Ultrasonic Level Transmitter

ULM84 Series User Manual

Dec.2020

Page 1 of 21

www.faraboard.com

FAHM Co.
Industrial Automation
Doc. ULM84 Rev.99-12

Ultrasonic Level Transmitter ULM84 User Manual

Содержание ULM84 Series

Страница 1: ...Ultrasonic Level Transmitter ULM84 Series User Manual Dec 2020 Page 1 of 21 www faraboard com FAHM Co Industrial Automation Doc ULM84 Rev 99 12 Ultrasonic Level Transmitter ULM84 User Manual ...

Страница 2: ...A Output Current Output HART Protocol M20x1 5 Electrical Connection G1 5 G2 G3 Flange Process Connection Plastic Aluminum Housing Materials Polyurethane ETFE PTFE Sensor Head Materials 20 85 C IP68 Ambient Temperature Environmental Conditions 40 100 C Process Temperature Process Conditions 0 8 2 0 bar Process Pressure 3 Installation Figure 1 Transmitter s installation place Please pay attention to...

Страница 3: ...ule 5 it should be installed on left part with a suitable distance from the wall rule 6 and from the liquid level rule 1 Finally regarding tank conditions and choosing the correct installation location the transmitter is mounted using bracket flange or thread nut Figure 3 Mounting methods 4 Wiring There are two possible ways to do the wiring If the goal is to read the transmitter s current or to a...

Страница 4: ... 8 Error NAN display mode The following reasons may also cause to display one of errors in Figure 9 a If the time passed the last level detection by the transmitter is more than Alarm Time1 and the transmitter couldn t detect the level anymore the left screen of Figure 9 would be displayed b If because of defect in the sensor itself or its connecting cable the transmitter failed to reach the senso...

Страница 5: ... to change the numbers signs or choices of the parameter And finally when calibrating the 20 mA current output P02 20 mA Setup you can press the key for 2 to 10 seconds to accept just detected level as the reference for 20 mA current output Please note that if you hold the key for less than 2 seconds or more than 10 seconds the device ignores it Down Key In lists this key will take us to next scre...

Страница 6: ...o choose to calculate the mass a The volume is calculated based on the level and the mass calculated based on the volume given that the user has provided the density This method makes sense when the shape of the tank is symmetrical b The user provides a lookup table of level volume pairs max 10 entries and the volume is calculated using this lookup table then the mass is calculated based on the vo...

Страница 7: ...he main value to be displayed Echo Curve Display Mode In this mode all received waves by the device in a defined time range are displayed also by drawing the Threshold Level line the user can see the waves that are identified as target levels In addition to the curve there are Noise to Signal Ratio Gain Temperature Power Percent Number of Pulses Dead Band size Distance to the Liquid and Liquid Lev...

Страница 8: ...ds Relays State R A value of 1 is presented when any of the HH H L or LL is active from left to right accordingly A value of 0 means it is inactive for example R0001 means only the LL relay is active and the others are inactive Wave State X The Transmitter is transmitting Ultrasonic Waves Blank The Transmitter is receiving Ultrasonic Waves Noise N With a value of 1 to 100 the Noise to Signal Ratio...

Страница 9: ...P41 Alarm Output P02 20 mA Setup P23 Alarm Limit LO LO P62 Sim Reset P42 Alarm Time P03 Display Mode P22 Alarm Limit LO P61 Sim Level P43 Threshold P04 Probe Height P21 Alarm Limit HI P60 Sim Current P44 Output Power P05 Change Rate P20 Alarm Limit HI HI P52 Comm ID P45 Burst Number P06 Dead band P15 Length Vol Table P51 Altitude P46 Gain Range P07 Length Unit P14 Tank Volume P50 Safety Dist P47 C...

Страница 10: ...vel Value to activate High Alarm P21 Alarm Limit HI Define Liquid Level Value to activate Low Alarm P22 Alarm Limit LO Define Liquid Level Value to activate Low Low Alarm P23 Alarm Limit LO LO Define how long the Outputs should stay Active after the Level returns to Normal Area P24 Alarm Buffer Advanced Menu Pass 00101 Define Damping Time P40 Damping Time Choose Alarm State from High Low or Keep L...

Страница 11: ...lations of other levels are easier However the user can select any other level as a reference level depending on the circumstances and at will After determining the reference level it must be determined how much higher or lower than the reference level is the maximum expected level for the liquid at which the transmitter has a current output of 20 mA If it is higher the value of the distance shoul...

Страница 12: ... defined for the transmitter through this menu This choice provides the equipment with the knowledge that it is ready to identify how much change in the liquid level and thus be able to differ liquid and potential obstacles Table 5 Shows the user selected rate of change of the liquid level in the upper left corner of the screen Selected speed Symbol Equivalent Speed Fast S0 The Speed is high near ...

Страница 13: ...lculation Mode based on Level P12 Volume Calc Mode This menu will be activated if the quantity to be measured in Volume or Mass is selected and in this case depending on the physical condition of the tank and the user s opinion here you can define how to calculate the volume by the liquid level In this menu two methods can be selected to calculate the volume by level If the direct calculation meth...

Страница 14: ... on the seventh level volume pair does it the same as before But if he concludes that it is not necessary to continue the process of completing the table it is requiredto simply keep thenewly createdpair for example theseventhpair here in the same state 1 1 In this way the equipment will know that it must do the work of determining the volume of liquid in the tank according to the previous data he...

Страница 15: ...her than the value set in this menu than the level set for activating the alarms 11 Transmitter s Advanced Settings Password 00101 In this section the advanced settings of the transmitter will be fully described To enter the advanced settings of the transmitter after pressing the ENT key the Password page will open with the default password 00000 By changing this number to 00101 and pressing the E...

Страница 16: ...itter should wait to notify the alarm i e if the alarm is not there after this duration there would be no notifications Define Threshold Value P43 Threshold Any value smaller than this value in returned received wave in the transmitter would be ignored A big value would decrease the transmitter s sensitivity The value could be either automatic or any value between 0 to 100 Define Output Power P44 ...

Страница 17: ...ters maximum and minimum level and installation height of the equipment are done correctly there is no need to change this menu Define Device Address for HART protocol connection P52 Comm ID Used to determine the equipment address between values 0 to 15 and to communicate with it through the HART protocol Note that if the equipment address in this setting is any non zero number the output current ...

Страница 18: ... value of the probe surface parameter from the following equation Transmitter probe level liquid level from reference point distance read on display from liquid level By determining the above parameter the operation of starting the transmitter is completed and this equipment will be ready for operation Define Level Parameters of Sample Tank 1 Figure 23 First sample tank The 10 meter tank in Figure...

Страница 19: ...k 2 In this example a 12 meter wall can be seen that has a depth of about 9 meters underground and also its height from the ground is more than 3 meters This time the surface of the earth is considered as a reference point Also according to the information we have from the liquid we know that the changes in the liquid level are in a range of 9 meters which is a maximum of one meter above the groun...

Страница 20: ...ctuation No display dim display reverse display or unrecognized characters In case of reversed display or unrecognized characters a short circuit between input and output circuits is possible Current Output failure Obstacle exists Change installation location Increase the Deadbane in P06 Dead band No display or dim display Check power supply s voltage Wrong power supply polarity Damaged fuse by hi...

Страница 21: ...to P06 Dead band Power supply mismatch Poor liquid surface reflection Bubbles on liquid surface Floating things on liquid surface Uneven surface Unsuitable enviromental conditions Faulty Proble unable to transmit waves Decreased Probe sesetivity High temp or overpressure Probe surface damaged Used for a long time Water inside transmitter Wrong data but no fluctuation Distance is correct but wrong ...

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