Fark Basınç Transmitteri
Temel olarak iki nokta veya iki farklı basınç kaynağı arasındaki basınç farkını ölçen fark basınç transmitterinin en yaygın kullanıldığı uygulamalar sıvı akışkanlar için seviye, yoğunluk, arafaz, debi ve basınç kaybı ölçümü, buhar ve gaz fazdaki akışkanlar için basınç kaybı ve debi ölçümüdür. Analog transmitterlere göre daha dinamik ve yüksek hassasiyetlidirler. Fark basınç transmitterleri bu özellikleri sayesinde daha sıkı bir proses takibi imkanı sağlar.
FUNCTIONAL SPECIFICATIONS
| Span/ Range Limits | kPa | inH2O | mbar | mmH2O | |
| B | Span | 0.2~6 | 0.8~24 | 2~60 | 20~600 |
| Range limits | -6~0 | -24~24 | -60~60 | -600~600 | |
| C | Span | 0.4~40 | 1.6~160 | 4~400 | 40~4000 |
| Range limits | -40~40 | -160~160 | -400~400 | -4000~4000 | |
| D | Span | 2.5~250 | 10~1000 | 25~2500 | 0.25~25mH2O |
| Range limits | -250~250 | -1000~1000 | -2500~2500 | -25mH2O~25mH2O | |
| F | Span | 30~3000 | 120~12000 | 0.3~30bar | 3-300mH2O |
| Range limits | -500~3000 | -2000~12000 | -5~30bar | -5~300mH2O | |
PERFORMANCE SPECIFICATIONS
| Reference Accuracy of Calibrated Span: | ±0.075%，±0.1% （If TD>10(TD=URL/SPAN), ±(0.005×TD)%）
(includes terminal-based linearity, hysteresis, and repeatability) The square root accuracy is 1.5 times of reference accuracy of calibrated span. |
| Ambient Temperature Effects： | -20℃~65℃：±(0.075×TD+0.025)%×Span
-40℃~-20℃ & 65℃~85℃:±(0.1×TD+0.025)%×Span Every 10℃ is ±0.04% ×Span (TD=1) |
| Static Pressure Effects： | ±(0.025%URL+0.05%Span)/10MPa |
| Over pressure Effects： | ±0.05%×Span /10MPa |
| Stability： | ±0.1%×Span /3 years |
| Power Supply Effects： | ±0.001% /10V (12~42V DC) |
| Output： | Two wire 4~20 mADC output with digital communications, linear or square root programmable.
HART FSK protocol are superimposed on the 4~20 mADC signal. Output range: 3.9 mA to 20.5 mA. |
| Failure Alarm (the mode can be selected): | Low Mode (min): 3.7 mA High Mode (max): 21 mA
No Mode (hold): Keep the effective value before the fault. Note: The standard setting of failure alarm is High Mode. |
| Response Time: | The amplifier damping constant is 0.1 sec; The sensor damping constant is 0.1~1.6 sec, it depends on the range and range compression ratio. Amplifier damping time constant is adjustable from 0.1 to 60 sec by software and added to response time. |
| UpTime: | ＜15s |
| Ambient Temperature Limits: | -40 to 85℃ / -20 to 65℃ with LCD display or fluorine rubber sealing |
| Storage and Transportation
Temperature Limits: |
-50 to 85℃ / -40 to 85℃ with LCD display |
| Working Pressure Limits (Silicone oil): | Maximum working pressure:16MPa,25MPa,40MPa |
| Static Pressure Limits: | 3.5kPa abs. to maximum working pressure |
| One-way Overload Pressure Limit: | The maximum one-way overload pressure is maximum working pressure |
PHYSICAL SPECIFICATIONS
Wetted Parts Materials
| Sensor Body： | 316L stainless steel |
| Isolating Diaphragm： | 316L stainless steel / Hastelloy C/Gold plated on 316L/FEP
plated on 316L/Tantalum |
| Cover Flange： | 316 stainless steel |
| Nuts and Bolts： | 304 stainless steel |
| Process Connector： | 316 stainless steel |
| Fill fluid： | Silicone oil/Fluorinated oil |
| Process Connector Gasket： | Perbunan（NBR）/Viton （FKM）/Teflon(PTFE) |
| Amplifier Housing： | Aluminum with epoxy resin coat |
| Housing Gasket： | Perbunan（NBR） |
| Name plate and tag： | 304 stainless steel |
| Weight： | 3.3kg |
| Degrees of Protection: | IP67 |
