Teledyne HFM-E-200 Inlet Removal, Printed Circuit Board Replacement, Sensor Replacement

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4.3.2. Miscellaneous adjustments

Periodically, during normal operation, the ZERO should be checked and adjusted when required. If the instrument is not stopping the flow completely when command signal is Zero, the orifice may require turning approximately 1/8 turn clockwise.

4.4.Inlet Removal:

The fitting on the inlet side must be removed to gain access to the filter or shunt assembly. First shut off the supply of gas to the instrument. Disconnect the Swagelok fitting on the inlet and outlet sides of the transducer, and remove it from the system plumbing. Carefully remove the inlet fitting, spring (if present) and shunt, noting their order and proper orientation. The shunt can be severely damaged if dropped. Examine the filter and shunt. If either is dirty or blocked, clean or replace as applicable. Reassembly is the reverse of the removal procedure. Recalibration of the HFC is necessary.

4.5.Printed Circuit Board Replacement

In the unlikely event that the PC board fails, it is easily removed from the instrument and replaced with a spare to minimize instrument downtime. Replacement of the PC board will require the instrument to be recalibrated per Section 4.3.1.

Unplug the power cable from the top of the transducer. Remove the two jackscrews next to the “Edge” connector and the two screws on the sides of the cover. Lift off the cover and unplug the four-wire sensor plug and the two wire valve plug, noting their orientation prior to removal.

Remove the screw that holds the PC board to the sensor. Troubleshoot or replace as applicable. Installation is the reverse of the above procedure. Recalibrate if any components were changed or if any potentiometers were adjusted.

4.6.Sensor Replacement:

If the sensor fails or becomes plugged it can be removed. Remove the cover and the PC board per Section 4.5 above. Remove the three bolts holding the sensor to the instrument base. Remove the sensor from the base noting the two O-rings (Parker 2-005, V884-75) between the sensor and the base. If the sensor is plugged it can be cleaned by running a fine wire (approximately 0.008" diameter) through the tube. If sensor needs replacement, obtain another from the factory and install it. Ensure that O- rings are clean and intact. Install O-rings on seating surface, then carefully place sensor over O-rings and tighten down the three screws evenly. Replacement of sensor will require recalibration per Section 4.3.1.

4.7.Orifice Changes:

The orifice may require replacement if a flow range change is desired, if a large change in differential pressures across the valve is desired or in the event that a small orifice becomes plugged. Replacement orifices can be acquired from the factory. See Section 4.8 for the list of standard orifices and their flow rates in air.

When using nonstandard pressures or gases that have specific gravities different than air (such as hydrogen or helium), the diameter of the orifice must be calculated using the following procedure:

A)Determine the minimum expected upstream pressure (Pu) in PSI absolute and the maximum expected downstream pressure (Pd) in PSI absolute for full flow conditions.

B)If Pu >2Pd, use formula 1; otherwise use formula 2.

HFM-E-200/HFC-E-202

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Contents Teledyne Hastings Manual Print History Table of Contents Features Installation and OperationSwagelok, 1/8 Swagelok, VCR, VCO SpecificationsHastings Power supplies Other AccessoriesInterconnecting Cables Optional 4-20 mA Current OutputOutput Signal Power RequirementsReceiving Inspection Mechanical ConnectionsElectrical Connections Zero Check OperationOperating Conditions Operation with a power supply other than a Hastings Operation with a Hastings power supplyOperation with External Devices High Pressure OperationSoft Start Range ChangingOperation with an external sensor. Fig Overall Functional Description Theory of OperationSensor ElectronicsShunt Valve Troubleshooting MaintenanceAuthorized Maintenance Calibration Procedure Figure AdjustmentsSensor Replacement Printed Circuit Board ReplacementMiscellaneous adjustments Inlet RemovalHFC-E-202 Orifice 0014 QReplacement Parts BF3 Conversion Factor TableC2H7N C3H8O SO2 Non-Warranty Repair Policy Warranty Repair PolicyDrawings HFM-E-200/HFC-E-202 HFM-E-200/HFC-E-202 HFM-E-200/HFC-E-202 HFM-E-200/HFC-E-202 HFM-E-200/HFC-E-202

HFC-E-202, HFM-E-200 specifications

Teledyne HFC-E-202 and HFM-E-200 are advanced flow meters designed to provide precise measurement and monitoring of gas and liquid flows in various industrial applications. Both devices are engineered to meet the demands of sectors such as petrochemicals, pharmaceuticals, and food and beverage, where accuracy and reliability are paramount.

The Teledyne HFC-E-202 is a highly sensitive flow meter that utilizes a thermal mass flow measurement technology. This technology enables the HFC-E-202 to accurately measure the mass flow rate of gases regardless of temperature and pressure conditions. One of its key features is its ability to provide high precision and fast response times, making it suitable for applications that require immediate data feedback. The device is also equipped with advanced diagnostics that allow users to monitor the health of the system and identify potential issues before they escalate.

On the other hand, the HFM-E-200 is particularly renowned for its versatility in measuring both gas and liquid flows. It employs differential pressure technology, which is highly effective in a wide range of operating conditions. The HFM-E-200 incorporates a robust design that can withstand harsh environments, ensuring longevity and reliability. Its user-friendly interface allows for easy configuration and monitoring, catering to both novice and experienced technicians.

Both flow meters feature digital output options, facilitating seamless integration with existing control systems. This enables real-time data acquisition and monitoring, enhancing process control and efficiency. Furthermore, their compact design minimizes installation space, allowing for easy placement in tight operational areas.

In terms of safety and compliance, both the HFC-E-202 and HFM-E-200 are designed to meet strict industry standards, ensuring they can be deployed in critical applications without compromising safety.

In conclusion, Teledyne HFC-E-202 and HFM-E-200 flow meters stand out due to their innovative technologies, accuracy, and durability. Their unique features position them as essential tools for a variety of industrial sectors, enhancing operational efficiency and ensuring reliable fluid flow measurement. With Teledyne’s commitment to quality and innovation, users can trust that these devices will meet their demands both now and in the future.
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