Flange level transmitter calibration method
Flange level transmitter adjustment:
　　
Our tool for level detection (taking into account the non-flowability of the measured medium, corrosion resistance, fouling, etc.) uses a single-inlet flange type 1151 liquid level transmitter, although the transmitter has excellent performance, but the use of When a year or a half load or range needs to be changed, it still needs a series of adjustments to make the product's performance meet the accuracy requirements. For this reason, we propose the following tuning methods for discussion: For non-intelligent 1151 Flange-type level transmitter with a range of 0-60kpa (transmitter's range code: 5, maximum 186kpa)
　　
Examples are:
　　
method one,
　　
Due to the flange-type liquid level transmitter, it has a diaphragm diameter of 76mm (manufacturer's standard size), for which we need to customize a calibration device for this interface. For example, if the range is 0-60kpa, you can add 60Kpa pressure to the positive pressure (H) side and adjust the "S" (range locator) to make the output current 20mA; after pressure relief, adjust the "Z" ( The zero positioner) makes the output current 4 mA. This repeats several times so that the calibration back-off is within the accuracy of the transmitter.
　　
Method Two,
　　
Since the 1151 transmitter has a "δ" chamber, it has a measuring diaphragm in the middle, and it produces a certain deformation with the pressure difference between the two sides. Therefore, add -60Kpa pressure in the negative pressure chamber (side), and adjust the "S" (range locator) so that the output current is 20mA; after pressure relief, adjust the "Z" (zero positioner) so that the output current is 4mA, This is repeated several times so that the checkback is within the accuracy of the transmitter. The advantage of this method is that it can be directly pressure-adjusted on the negative pressure side (standard 14-gauge pressure gauge fitting) when tested without a positive pressure side flange interface device.
　　
Method 3:
　　
Adjustment in the negative transfer state; first without any pressure, adjust the "Z" so that the output current is 4mA; secondly, the position of the positive and negative transfer jumpers of the amplifier circuit board components of the transmitter is "negative migration". status. Third, in the negative pressure chamber (L) by adding 60Kpa pressure, adjust the "Z" positioner, so that the current output 4mA; pressure relief, adjust the "S", so that the output is 20mA; (At this time, the transmitter has a range Change to -60-0Kpa to implement negative migration.) Fifth, change the negative transition position to no transition state, and adjust the "Z" zero to make the output current 4mA. Benefits of this method: The flange-type liquid level transmitter can be directly verified in a negative migration state, which facilitates the negative migration of closed-loop container liquid level detection.
　　
For smart transmitters now appearing, its range change only needs to be set (without adding any pressure), and its calibration (ie, characterization) needs to be carried out according to the above several methods, and its range setting The characterization can be performed on a dedicated device such as a host computer (with HART protocol interface and configuration software) or a 275 communicator.
Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells or wellbore.
It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow
drilling fluid to circulate and extraction to take place
The oil casing is a steel pipe used to support the well wall of oil and gas wells to ensure the normal operation of the whole well during drilling and after well completion. Several layers of casing shall be used for each well according to different drilling depth and geological conditions. Cement shall be used for cementing after casing is put into the well. It is different from TUBING and drill pipe and cannot be reused. It is a disposable consumable material. Therefore, casing consumption accounts for more than 70% of all oil well pipes.
Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or wellbore. It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow drilling fluid to circulate and extraction to take place.
Surface casing
- Protects the well from contamination in shallow water and gas layers.
- Supports the wellhead equipment and sustains the weight of the other layers of casing.
Intermediate casing
- Isolates different layers of pressure to facilitate normal circulation of drilling fluid and protect the production casing.
- Intermediate casing facilitates the installation of blow-out preventers, anti-leakage devices and tailpipes in the well.
Production casing (oil string)
- It is the conduit through which oil and gas pass from a below surface reservoir.
- It protects the well and separates fluids into various layers.
First, green pipes are threaded on each end. The threading is then inspected and, if necessary, rethreaded to ensure that the thread accurately connects to the coupling. The threading type includes STC/BTC/LTC. The casing pipes are strengthened by surface treatment and are subject to various inspections, including drifting and hydrostatic tests before they are coated and packaged into casing.
Casing pipes are ordinarily produced with outside diameter sizes of 114.3 mm to 508.0 mm.
Casing,Api 5Ct Casing,Api Spec 5Ct Casing PipeApi 5Ct Pipe Oil Casing
ESASTSUN OILFIELD EQUIPMENT MANUFACTURING (CAMBODIA) CO., LTD , https://www.eastsuncambodia.com