壓力|溫度|多功能校驗儀-深圳市必发888電子科技有限公司

TSI4040質量流量計FAQ常見問題解答

TSI4040質量流量計FAQ常見問題解答現在開始,首先是中文的,中文的問題和解答都是從英文版翻譯過來的,限于編者水平,翻譯得不好的或不對的地方,請以英文版的為準。

流量計是雙向的嗎?
流量計只能檢測流量的大小,不能檢測流量的方向。同時,按照流量計底部箭頭指示的方向校準儀表。請參閱應用說明TSI通用流量計上的反向流量效應,了解反向流量的校正。
 
模擬輸出是否有特殊的連接要求?
對。模擬信號接地回路連接到流量計內的電源接地。因此,您的設備必須使用帶差分輸入或浮地的電壓表或模擬輸入電路。不使用這種類型的接地將導致測量誤差。
 
這些不同的氣體有修正系數嗎?
不需要。這些流量計分別校準空氣和100%氧氣。其他氣體的校準涉及儀表中的內部算法。通過RS232命令選擇所需氣體。一旦設置好,LCD顯示屏將指示氣體校準。LCD上顯示的流速和流量計的輸出隨后會自動針對所選氣體進行校正。
 
這些流量計有壓力補償嗎?
對。只要這些壓力變化在0.5到2.0大氣壓絕對壓力范圍內,輸出讀數就可以補償壓力變化。
 
這些流量計有溫度補償嗎?
對。只要這些溫度變化在溫度補償范圍內,輸出讀數就會對溫度變化進行補償。
 
我可以改變模擬輸出信號的比例嗎?
對。通過使用“tsiseup.exe”實用程序,您可以設置10伏以表示流量計滿刻度的1 l/min流量(僅限l/min的積分值)。此外,您可以調整模擬輸出的零截距。注意,這不是真正的調零,因為流量計的模擬輸出不能低于零伏。這些參數可以通過使用隨儀器提供的TSI設置程序進行更改。
 
我可以清洗流量計中的傳感器嗎?
不可以。如果沒有專用的工廠工具,就無法接近傳感器元件。它也是易碎的,如果試圖從外面清洗它,它會被損壞。不要試圖通過液體來清潔傳感器。
 
我可以通過流量計測量兩個方向的流量嗎?
流量計的設計和校準適用于流量計主體上壓印的箭頭方向的流量。如果氣體清潔,倒流不會造成損壞。對于較高的流量,流量計可用于有腐蝕的逆流。有關此校正的討論,請參閱應用程序“反向流量4000和4100系列流量計”。這些流量計不能確定流向。如果您的設置顯示流量計具有瞬時流量反轉,例如在泵或閥操作期間,您可能會看到明顯的測量錯誤。葉片式泵尤其容易出現這種問題。如果您懷疑流量反向,請查看示波器上的模擬輸出,查看瞬時流量是否接近零。這種瞬時倒流會導致流量計讀數過高。更多信息請聯系工廠。
 
我能在任何方向操作流量計嗎?
對。
 
我可以減緩模擬輸出信號的響應嗎?
對。通過使用“tsiseup.exe”實用程序,模擬輸出的采樣率可以從1毫秒設置為1秒。
 
我需要過濾進入流量計的氣體嗎?
對。這些流量計使用暴露在氣流中的微小傳感器元件。如果此傳感器受到污染,精度可能會永久性地改變,傳感器可能會損壞。建議在流量計上游使用HEPA級過濾器。重要事項:如果始終使用清潔氣體,您的流量計將保持穩定和準確。
 
濕度會影響我的讀數嗎?
對。用干氣標定流量計。水蒸氣改變了氣體的性質。見TSI通用流量計濕度影響校正應用說明。
 
如何配置流量計選項?
通過使用RS-232接口,您可以控制流量計上的許多選項。其中包括:1)設置返回數據的采樣率。2)選擇要使用的氣體校準。3)選擇標準或體積流量單位。4)設置音量測量的開始和結束觸發電平。5)設置模擬輸出零點和量程。6)設置模擬輸出采樣率。7)設置LCD顯示器的更新速率。8)為4140型設置特殊的顯示滾動選項。
 
如何使用提供的兩條電纜連接流量計?
(有關插腳和連接的詳細信息,請參閱操作手冊)。計算機電纜,PN 1303583,8針Mini-Din至9針D-Sub。——用于將流量計連接至計算機上的RS232連接。--必須向流量計的直流電源輸入插孔提供直流電源。模擬電纜,PN1
TSI4040測試問題解答

ARE THE FLOWMETERS BI-DIRECTIONAL?
The flowmeters cannot detect the direction of the flow only the magnitude of the flow. Also the meters are calibrated in the direction indicated by the arrow on the bottom of the flowmeter. See the application note Reverse Flow Effects on TSI General Purpose Flowmeters for the correction for reverse flows.

ARE THERE ANY SPECIAL CONNECTION REQUIREMENTS FOR THE ANALOG OUTPUT?
必发888 Yes. The analog signal ground return is connected to the power ground inside the flowmeter. For this reason your equipment must use a voltmeter or analog input circuit with a differential input or floating ground. Failure to use this type of ground will result in measurement errors.

ARE THERE CORRECTION FACTORS FOR THESE DIFFERENT GASSES?
No. These flowmeters are separately calibrated for air and 100% O2. Calibrations for the other gasses involves an internal algorithm in the meter. The desired gas is selected by an RS232 command. Once set, the LCD display indicates the gas calibration. The flow rate displayed on the LCD and the flowmeter’s outputs is then automatically corrected for the selected gas.

ARE THESE FLOWMETERS PRESSURE COMPENSATED?
必发888 Yes. The output readings are compensated for pressure changes as long as those pressures changes are within 0.5 to 2.0 atmospheres absolute pressure.

ARE THESE FLOWMETERS TEMPERATURE COMPENSATED?
必发888 Yes. The output readings are compensated for temperatures changes as long as those temperature changes are within the temperature-compensated range.

CAN I CHANGE THE SCALING OF THE ANALOG OUTPUT SIGNAL?
必发888 Yes. By using the "TSISetup.exe" utility program you can set 10 Volts to represent a flow 1 L/min to the full scale of the meter (interger values of L/min only). In addition, you can adjust the zero intercept of the analog output. Note that this is not a true zero adjust because the flowmeter’s analog output cannot go below zero Volts. These parameters can be changed by using the TSI Setup program that is supplied with the instrument.

CAN I CLEAN THE SENSOR IN MY FLOWMETER?
No. The sensor element is not accessible without special factory tools. It is also fragile and would be damaged by attempts to clean it from the outside. NEVER attempt to clean the sensor by running liquids through it.

CAN I MEASURE FLOW IN BOTH DIRECTIONS THROUGH MY FLOWMETER?
The flowmeter is designed and calibrated for flows in the direction of the arrow embossed on the flowmeter body. No damage will occur if the flow is reversed provided that the gas is clean. For higher flowrate the meter can be used in reverse flow with a correciton. See application "FLOW-Reverse Flow 4000 and 4100 Series Flowmeters" for a discussion on this correction. These flowmeters cannot determine the direction of the flow. If your setup presents the flowmeter with momentary flow reversals, such as during pump or valve operation, you may see significant measurement errors. Vane type pumps are especially prone to this problem. If you suspect flow reversals, look at the analog output on an oscilloscope to see if the instantaneous flow is going near zero. This type of momentary flow reversal will cause the flowmeter to read high. Contact the factory for more information.

CAN I OPERATE MY FLOWMETER IN ANY ORIENTATION?
Yes.

CAN I SLOW DOWN THE RESPONSE OF THE ANALOG OUTPUT SIGNAL?
必发888 Yes. By using the "TSISetup.exe" utility program, the sample rate of the analog output can be set from 1 msec to 1 second.

DO I NEED TO FILTER THE GAS GOING INTO MY FLOWMETER?
必发888 Yes. These flowmeters use a tiny sensor element exposed to the gas stream. If this sensor becomes contaminated, the accuracy can be permanently changed and the sensor may be damaged. A HEPA grade filter is recommended and should ALWAYS be used upstream of the flowmeter. IMPORTANT: Your flowmeter will remain stable and accurate if it is always presented with clean gas.

DOES HUMIDITY AFFECT MY READINGS?
Yes. The flowmeters are calibrated with dry gas. Water vapor changes the gas properties. See the application note on humidity effects Correcting for Humidity Effects on TSI General Purpose Flow Meters.

HOW CAN I CONFIGURE THE FLOWMETER’S OPTIONS?
必发888 By using the RS-232 interface, you can control a number of options on the flowmeter. These include: 1) Set the sample rate at which data is returned. 2) Select the gas calibration to be used. 3) Select either standard or volumetric units of flow. 4) Set the beginning and end trigger levels for volume measurements. 5) Set the analog output zero and span. 6) Set the analog output sampling rate. 7) Set the update rate for the LCD display. 8) Set special display scroll options for the Model 4140.

HOW DO I CONNECT MY FLOWMETER USING THE TWO CABLES SUPPLIED?
(See the operator’s manual for pin-out and connection details). Computer Cable, PN 1303583, 8 pin mini-DIN to 9 pin D-SUB. --Used to connect the flowmeter to the RS232 connection on a computer. --DC power must be supplied to the flowmeter’s DC power input jack. Analog Cable, PN 1303584, 8 pin mini-DIN to tinned leads --Used to connect the flowmeter to external devices or systems. --Analog output signal available --RS232 signal available --DC power can be supplied through this cable or to the DC power input jack.

HOW DO I RECALIBRATE MY FLOWMETER?
TSI flowmeters must be returned to the factory for calibration. They are linearized and calibrated using very specialized, automated flow calibration systems. The calibration system then stores the calibration data in an EPROM in the flowmeter. It is not possible to calibrate these flowmeters without such systems. Users that have accurate flow standards can, of course, verify the calibration.

HOW DO THESE FLOWMETERS MEASURE VOLUME?
They integrate flow rate over time to produce a volume measurement. The volume measurement is only available via the RS232 output.The START and STOP trigger criteria are controlled by RS232 settings. The start and stop triggers can be controlled by a flow or pressure. Also, the volume measurement can be set for a fixed amount of time. See the RS232 Command Set Manual for more information on volume measurements.

HOW OFTEN SHOULD I RECALIBRATE MY FLOWMETER?
必发888 To maintain a high degree of accuracy in your measurements, TSI recommends that you return your instrument to the factory for an annual NIST traceable recalibration.

I NEED TO DEVELOP CUSTOM SOFTWARE USING LABVIEW® TO INTERFACE WITH THE TSI FLOWMETER. WHAT HELP IS AVAILABLE?
You can download a demonstration program called ”Real Time Demo Program” from our web site. This incorporates many common elements of control, data collection and display. The LabView® source code for this demo program can be downloaded from the web site as ”Source Code for Real Time Demo Program”.

IS THE READOUT STANDARD LITERS PER MINUTE OR ACTUAL LITERS PER MINUTE?
必发888 The default output is standard liters per minute. By using the TSI flowmeter setup program supplied with the instrument, users can switch the output to actual liters per minute.

IS THERE AN RS-232 INTERFACE AVAILABLE ON THE FLOWMETER?
Yes. The RS232 interface can be used to (1) select user options and settings, (2) obtain outputs of flow, volume, temperature, and pressure.

PLEASE EXPLAIN NIST TRACEABILITY
NIST is the National Institute of Standards and Technology. All test and calibration data supplied by TSI has been obtained using standards whose accuracies are traceable to NIST or has been verified with respect to instrumentation whose accuracy is traceable to NIST.

WHAT ABOUT OTHER GASSES AND MIXTURES?
必发888 Corrections for gasses not listed above are not available at this time. Correction algorithms for other gasses need to be developed and programmed into the flowmeter’s microcomputer by TSI. Additional gasses will be added in the future.

WHAT ARE SOME APPLICATIONS FOR WHICH THESE FLOWMETERS ARE NOT DESIGNED?
Dirty or unfiltered gas; Liquids or condensing vapor; Pressure greater than 15 psig; Combustible mixtures; Gasses/mixtures that are not supported (see specs); Hydrogen; Gasses outside the temperature range of 0-50°C.

WHAT ARE SOME TYPICAL APPLICATIONS FOR THESE FLOWMETERS?
Production Testing; Quality Assurance; Product Development; Research; Field Service; Process Monitoring.

WHAT ARE SOME TYPICAL INDUSTRIES THAT USE THESE FLOWMETERS?
必发888 Medical –Ventilators, –Anesthesia; Pharmaceutical; Industrial Hygiene; Metrology; Aerosol Science; Fuel Cell.

WHAT ARE THE AVAILABLE OUTPUTS OF FLOW DATA?
On the Model 4040/4043/4045, the flow is continuously displayed on the LCD screen. On the Model 4140/4043, the flow can be displayed continuously or scrolled on the LCD screen. The modes of display are controlled by the use of the TSI Setup utility program. On all models the flow is available as an anolog output (0V to 10V). See questions under Analog output for more details. On all models the flow is available via the RS232 interface. See the RS232 Command Set Manual for more information. This is available to download from our product page.

WHAT ARE THE AVAILABLE OUTPUTS OF PRESSURE DATA?
On the Model 4040/4043/4045 the pressure is continuously displayed on the LCD screen. On the Model 4140/4143 the pressure can displayed continuously or scrolled on the LCD screen. The modes of display are controlled by RS232 commands. On all models the pressure is available via the RS232 interface. See the RS232 Command Set Manual for more information. This is available to download from our product page.

WHAT ARE THE AVAILABLE OUTPUTS OF TEMPERATURE DATA?
必发888 On the Model 4040/4043/4045 the temperature is continuously displayed on the LCD screen. On the Model 4140/4143 the temperature can displayed continuously or scrolled on the LCD screen. The modes of display are controlled by RS232 commands. On all models the temperature is available via the RS232 interface. See the RS232 Command Set Manual for more information. This is available to download from our product page.

WHAT ARE THE AVAILABLE OUTPUTS OF VOLUME DATA?
必发888 The volume measurement is only available via the RS232 output. See the RS232 Command Set Manual for more information.

WHAT ARE THE SPECIAL FEATURES OF THESE FLOWMETERS?
必发888 Easy to Use; High Accuracy: 2% of reading, not % of full scale; Low Pressure Drop; Fast response flow time: 4 ms to 63% step change; Simultaneous measurement of pressure and temperature; High Stability; LCD Display; Digital and Analog outputs; Temperature & Pressure compensated; User-configurable.

WHAT DATA IS AVAILABLE FROM THE ANALOG OUTPUT?
The analog output signal represents the flow rate. Temperature, pressure, and volume information are not available from the analog output.

WHAT IS THE ACCURACY AND RANGE OF THE TEMPERATURE MEASUREMENT?
必发888 The measurement range for gas temperature is 0-50°C. The accuracy is ± 1°C at flows greater than 1 L/min. At flows below 1 L/min the heat generated by the flow sensor element heats the gas inside the flow tube. The indicated temperature is therefore higher than the actual flow temperature.

WHAT IS THE DIFFERENCE BETWEEN “% OF READING” AND “% OF FULL SCALE” ACCURACY SPECIFICATIONS?
必发888 The accuracy of many non-TSI of flowmeters is specified as a percent of full-scale. For example, if a 300 L/min flowmeter is specified as 2% of full-scale, the best accuracy is at 300 L/min where the maximum error is 300 * .02 = 6 L/min. At 5 L/min, the allowable error is still 6 L/min which is 120% of the reading. At 2.5 Std L/min, the allowable error is 240% of the reading! TSI flowmeters are specified as a percent of reading. The basic sensor technology used by TSI allows us to make this critical difference. It gives TSI flowmeters an extremely wide dynamic range and excellent accuracy over a wide range of flows. For a TSI flowmeter with a full scale of 300 Std L/min, the accuracy is 2% of reading from 300 Std L/min all the way down to 2.5 Std L/min. Even at 0.5 Std L/min the accuracy is still a very useful 10% of reading. You can download the spec sheet for our General Purpose Flowmeters from our product page. The spec sheet has additional information about the accuracy specification as well as graphical representations of the specifications.

WHAT IS THE DIFFERENCE BETWEEN STANDARD FLOWRATE AND VOLUMETRIC FLOWRATE?
必发888 Please download from our web site: Applications Note FLOW-Standard vs Volumetric.

WHAT IS THE FLOW ACCURACY OF THE FLOWMETERS?
必发888 Models 4040/4043/4045 (high flow) -- Air and O2: ±2% of reading or 0.05 Std L/min, whichever is greater. This means that from full scale (300 or 200 Std L/min) all the way down to 2.5 Std L/min the accuracy is 2% of reading. Even at 0.5 Std L/min the accuracy is still a very useful 10% of reading! N2 and Air/O2 Mixtures: ±3% of reading or 0.1 Std L/min, whichever is greater. This means that from full scale (300 or 200 Std L/min) all the way down to 3.3 Std L/min the accuracy is 3% of reading. Models 4140/4143 (low flow) -- Air and O2: ±2% of reading or 0.005 Std L/min, whichever is greater. This means that from 20 Std L/min all the way down to 0.25 Std L/min the accuracy is 2% of reading. N2: ±3% of reading or 0.01 Std L/min, whichever is greater. This means that from 20 Std L/min all the way down to 0.33 Std L/min the accuracy is 3% of reading. Even at 0.1 Std L/min the accuracy is still a very useful 10% of reading! N2O: ±4% of reading or 0.01 Std L/min, whichever is greater. This means that from 20 Std L/min all the way down to 0.25 Std L/min the accuracy is 3 of reading. See the specifications section of the operator’s manuals for additional specifications regarding temperature and pressure.

WHAT IS THE RANGE AND ACCURACY OF THE PRESSURE MEASUREMENT?
The pressure range is 50-199 kPa (0.5 - 1.99 Bar, 7.3-28.9 psi) absolute. The pressure transducer will not be harmed by overpressure up to 620 kPa. The accuracy is ±1 kPa.

WHAT IS THE RANGE OF THE ANALOG OUTPUT SIGNAL?
0 to 10 Volts = 0 to full scale flow

WHAT IS THE RANGE OF VOLUME MEASUREMENT?
4040/4043/4045: 0.001 to 999.999 Liters. 4140/4143: 0.0001 to 99.999 Liters.

WHAT IS THE RESPONSE OF THE PRESSURE MEASUREMENT?
Less than 4 msec to 63% of the final value for a 30 kPa step change.

WHAT IS THE RESPONSE OF THE TEMPERATURE MEASUREMENT?
Less than 75 msec to 63% of final value for a 20°C step change in temperature at full scale flow.

WHAT IS THE RESPONSE TIME OF THE FLOW MEASUREMENT?
Less than 4 milliseconds to 63% of final value at full scale flow.

WHAT SOFTWARE DO I NEED TO CONFIGURE THE FLOWMETER’S OPTIONS?
必发888 The most convenient way to configure the flowmeter’s options is with a small utility program called “TSI Setup”. This is included on a CD ROM with newer flowmeters or can be downloaded at no cost. You can also enter commands manually using a communications utility program such as Hyperterminal which is supplied as an accessory with most versions of Microsoft Windows. You can download an applications note from our web site that describes how to set up Hyperterminal for use with TSI flowmeters. Download TSI Applications note FLOW-Hyperterminal.

WHERE IS THE PRESSURE TAP LOCATED?
The pressure measurement is the absolute pressure inside the flow tube near the exit.

WHICH GASSES CAN I MEASURE?
Models 4040/4043/4045: Air, 100% O2, Air/O2 mixtures, 100% N2 Models 4140/4143: Air, 100% O2, 100% N2 Models 41403/41433: Air, 100% O2, 100% N2, 100% N2O The calibration can be switched for these gasses by using the utility program “TSI Setup”, supplied with the instrument.
文章來源于TSI4040進口質量流量計

上一篇:Fluke381鉗形萬用表顯示直均方根交流/直流鉗形表
下一篇:通道間絕緣的LR8401-21便攜式記錄儀

專業選型請咨詢我們工作人員

全國統一服務熱線

0755-83959699
0755-83983899
0755-23964199
0755-23964599

必发888(國內任一地區手機、座機均可撥打)

版權所有:深圳市必发888電子科技有限公司 粵ICP備15021421號-3

必发888變壓器綜合測試儀供應商哪家好,電能質量分析儀品牌推薦,多功能校驗儀介紹說明,Fluke功率分析儀器價格,數字壓力表多少錢

收縮

必发888電子在線客服

  • 銷售一部
  • 銷售二部
  • 銷售三部
  • 0755-83959699
  • 0755-83983899
  • 在線留言