To Next PageTo Next PageWhat does alarm code 36 on Siemens Measuring Instruments mean?
If your Siemens Measuring Instruments display shows no flow and the measured sound velocity is 0 m/s, accompanied by alarm code 36, it indicates that the pipe dimensions are too small for the selected sensor size or frequency. Verify the pipe dimensions, fluid selection, and sensor selection. The application may not be suitable for the purchased sensor size.
What does alarm code 28 mean on Siemens Measuring Instruments?
If the display shows active flow on your Siemens Measuring Instruments with Alarm code 28, it could be due to a duplicate assignment of pressure, density, viscosity, or temperature. Check the "inputs and outputs" channels assignment, reassign inputs, or disable unused inputs. It may also be caused by the RTD input conversion indicating an out-of-range temperature. Check the RTD connections, ensure that the selected RTD type matches the resistance of the installed RTD, and verify that the user RTD calibration parameters are set correctly in the RTD setup menu.
What does alarm code 7 mean on Siemens Measuring Instruments?
If the display shows active flow on your Siemens Measuring Instruments with Alarm code 7, it could be because the measured transit-time (sound velocity) is outside the allowed range for the entered sensor spacing. If your application involves multiple fluid compositions that may experience a significant variation in sound velocity, ensure that the sensor setup wizard is performed using the nominal fluid sound velocity. Also, optimal performance is achieved when the sensors are spaced correctly based on the actual fluid sound velocity, so perform the sensor setup wizard again using the initially measured sound velocity as the expected sound velocity if possible.
What to do if Siemens Measuring Instruments display shows no flow?
If the Siemens Measuring Instruments display shows no flow, it could be due to several reasons. First, ensure the pipe is filled with liquid, or at least the sound path is covered. Check that the sensor cable is correctly connected in the transmitter's terminal housing, ensuring the screen and center pin are connected inside the sensor top. Lastly, verify that the sensor window inside the pipe isn't damaged and that no permanent disturbance is present.
Why is the flow not stable on my Siemens SITRANS FST030 Measuring Instruments?
Unstable flow readings on your Siemens Measuring Instruments can occur due to air bubbles or particles disturbing the measurement. Ensure the pipeline is ventilated and the concentration of particles is limited. Also, check that the sensor cables are properly connected at both the transmitter and the sensors, including the cable grounding shield. Verify the connection of the cable grounding shield and that the shield and center pin are connected inside the sensor top. Finally, confirm that the entered path lengths correspond to the measurement report to avoid ultrasonic echoes.
What to do if Siemens Measuring Instruments device displays negative flow?
If your Siemens Measuring Instruments device displays negative flow, first check that the sensor cables are connected correctly, ensuring 1A connects to 1A, 1B to 1B, 2A to 2A, and 2B to 2B. Also, verify that the setting of menu 3.1.5.1 is set to '+ Direction'.
What to do if Siemens SITRANS FST030 Measuring Instruments pulse/frequency output does not work?
If the pulse/frequency output of your Siemens Measuring Instruments isn't working, start by initiating a simulation on the pulse/frequency output via menu 2.4, coupling the frequency measuring instrument directly to the terminals. Also, adjust the pulse or frequency output settings in menu 4.2.
Why Siemens SITRANS FST030 Measuring Instruments device displays 0 flow but device status is OK?
If your Siemens Measuring Instruments device displays 0 flow with an OK status, it could be because the process flow value is very low compared to the device's low flow cut-off limit. To test this, check that the low flow cut off (menu 3.1.6) is set to 0. Another possible cause is mismatched sensor cables, so check that as well.
How to fix a dark LCD display on Siemens Measuring Instruments?
If the LCD display on your Siemens Measuring Instruments is dark or partly dark, turn off the power. Check the connections for the power supply PCBA and the flat cable for the display module. If the display is partly dark, start the display test (menu 2.3.2.).
Why is the flow direction wrong on my Siemens Measuring Instruments?
If the flow rate appears correct, but the sign (flow direction) is wrong on your Siemens Measuring Instruments, first verify that the upstream sensor is connected to the upstream F-connector on the frontend (labeled A). Also, check the flow direction parameter in Setup > Sensor > Flow direction; it might be set to "negative" flow.
General| Power supply | 24 V DC |
|---|---|
| Enclosure rating | IP67 |
| Material | Stainless Steel |
| Protection Rating | IP67 |
| Medium | Gases |
| Nominal diameter | DN15 to DN300 |
| Process temperature | -40 °C to +150 °C |
| Operating pressure | up to 40 bar |
| Accuracy | ±1% of reading |
| Output signal | 4-20 mA, pulse |
| Communication | HART |
| Gas types | Natural gas |
| Process Connection | Flanged, threaded |
| Ambient Temperature | -20 °C to +60 °C |
| Certifications | ATEX, IECEx |
Outlines conditions to maintain device status and ensure safe operation.
Details requirements for qualified personnel and special conditions for hazardous area applications.
Provides instructions for mounting the wall mount housing transmitter.
Covers essential safety precautions for electrical connections, including grounding.
Guides through the commissioning process using wizards like Quick commissioning and Sensor settings.
Explains operation using the local HMI, including display views and access control.
Provides an overview of potential symptoms, diagnostics, causes, and remedies for common issues.
Provides a comprehensive list of Modbus holding registers for parameters and their configurations.
Guides on using SIMATIC PDM for commissioning, maintenance, and parameter adjustment.
