溫壓補(bǔ)償還有前提?
溫壓補(bǔ)償還有前提?
(本文由專業(yè)銷售記錄儀記錄筆記錄紙綠圖控儀器儀表有限公司提供)溫壓補(bǔ)償還有前提?
溫壓補(bǔ)償?shù)那疤?nbsp; 溫壓補(bǔ)償還有前提?
現(xiàn)以用孔板測(cè)蒸汽流量為例進(jìn)行說(shuō)明。當(dāng)被測(cè)蒸汽流量的實(shí)際參數(shù)(溫度、壓力)與設(shè)計(jì)的參數(shù)不一致時(shí),其流出的系數(shù)C、流束線脹系數(shù) ε、孔徑d等值都會(huì)改變。溫壓補(bǔ)償還有前提?
但當(dāng)蒸汽的溫度、壓力波動(dòng)不大,即工況參數(shù)偏離設(shè)計(jì)參數(shù)不太多,對(duì)測(cè)量影響較小時(shí),采用穩(wěn)壓補(bǔ)償措施才能達(dá)到理想的測(cè)量精度。其補(bǔ)償公式大多為經(jīng)驗(yàn)公式,但當(dāng)工況參數(shù)偏離設(shè)計(jì)值太多或工況參數(shù)波動(dòng)頻繁且太大時(shí),即使有了穩(wěn)壓補(bǔ)償措施,仍難達(dá)到測(cè)量精度要求,此時(shí)對(duì)于特定的孔板而言,只能重新計(jì)算差壓與流量之間的關(guān)系。溫壓補(bǔ)償還有前提?
但目前已可引入較完善的補(bǔ)償、修正措施了,即通過(guò)智能儀表或DCS對(duì)流出系數(shù)C、流束線脹系數(shù) ε、密度ρ進(jìn)行**修正,但其測(cè)量精度取決于算法。要做到全補(bǔ)償還是有一定的難度的。
Specifications規(guī)格:
- Rectangular recorder 277 x 277 mmfor wall or panel mounting
墻式安裝或面板裝配式277mm*277mm矩形記錄儀
- Case St. Steel AIAISI 316, weatherproof,corrosion restistant
抗風(fēng)雨耐腐蝕,ST.STEEL AIAISI316標(biāo)準(zhǔn)外殼
- Recording with disposable feltpen on circular recorder charts diameter 223 mm, writing width 80 mm
帶一次性記錄筆的圓圖有紙記錄儀,記錄紙直徑223mm,記錄寬度為80mm
- Mechanical spring wound clock, revolution time 24 hrs (clockwise)
24小時(shí)順時(shí)針機(jī)械鐘面式指示
- Viewing window laminated safety glass
帶視察夾層**玻璃
- A Accuracy Class 1,0 (+/- 1% of full scale)
**精度(全刻度+/- 1% )
- Connection bottom or back, 1/2" NPT male or 1/2" BSP male
1/2" NPT male 或 1/2" BSP male底部或背部連接
Minimum pressure range:0-1 bar / 0-15 psi
壓力測(cè)試*小值:0-1 bar / 0-15 psi
Maximum pressure range:0-4000 bar / 0-60.000 psi
壓力測(cè)試*大值:0-4000 bar / 0-60.000 psi
Minimum temperature span: 60°C.
溫度測(cè)量*小跨度:60°C.
Minimum temperature: -170 °C
*低溫度測(cè)量值:-170 °C
Maximum temperature: +600 °C
*高溫度測(cè)量值:+600 °C
Options可選配件
- Portable execution (with handle & feet, add T to type number)
便攜式(帶手柄、腳架)
- Wetted parts stainless steel AIAISI 316(for range 0-1600 bar max.)
浸液材質(zhì)為AISI316標(biāo)準(zhǔn)不銹鋼(*大范圍0-1600bar)
- Mechanical spring wound clock, single revolution time 1 hr, 4 hrs, 8 hrs,12 hrs or 7 days (clockwise,
optional: anti-clockwise)
鐘面式機(jī)械指示,單循環(huán)時(shí)間:1小時(shí),4小時(shí),8小時(shí),12小時(shí)或7天(順時(shí)針?lè)较?,可選擇逆時(shí)針?lè)较颍?/span>
- Switchable clockworks 1 hr/15 min,1 hr/4 hrs, 2 hrs/8 hrs, 24 hrs/7 days (clockwise)
可切換計(jì)時(shí)方式 1小時(shí)/15分鐘,1小時(shí)/4小時(shí),2小時(shí)/8小時(shí),24小時(shí)/7天(順時(shí)鐘方向)
- Multiprogrammable battery-operated chart drive (anti-clockwise)
多通道處理電池走紙選擇(逆時(shí)針?lè)较颍?/span>
- Dual pen execution
雙通道記錄筆
- Other ranges and process connections available upon request
可選擇其他連接方式和記錄范圍
- Special executions to customer’s special requirements
根據(jù)客戶其他特殊要求