Differential pressure transmitter / SM39PWB-CY differential pressure transmitter
Product Categories Differential pressure transmitter
SM39PWB-CY differential pressure transmitter is used to measure the level, density, pressure and flow of liquid, gas or steam, and then convert it into 4mA~20mADC HART current signal output. It can also communicate with HART handheld terminal for parameter setting and process monitoring.
SM39PWB-CY differential pressure transmitter is used to measure the level, density, pressure, and flow of liquid, gas or steam, and then convert it into 4mA~20mADC HART current signal output. It can also communicate with HART handheld terminal for parameter setting, process monitoring, etc.
Standard Specifications
(The range is adjusted based on the standard zero point, stainless steel 316L diaphragm, and the filling liquid is silicone oil)
- Performance Specifications
Reference accuracy of span adjustment (including linearity, hysteresis and repeatability from zero point):
± 0.075% If TD>10 (TD=maximum range/adjustment range), then: ±(0.0075×TD)%
The square root output accuracy is 1.5 times the linear reference accuracy above.
Ambient temperature influence
| Range code | -20℃～65℃ total impact | Range code | Total impact of -40℃～-20℃ and 65℃～85℃ |
| A | ±(0.45×TD+0.25)%×Span | A | ±(0.45×TD+0.25)%×Span |
| B | ±(0.30×TD+0.20)%×Span | B | ±(0.30×TD+0.20)%×Span |
| C/D/F | ±(0.20×TD+0.10)%×Span | C/D/F | ±(0.20×TD+0.10)%×Span |
Over range impact
±0.075%×Span
Static pressure effect
| Range code | Impact |
| A | ±(0.5%Span)/4MPa |
| B | ±(0.3%Span)/16MPa |
| F/G/H/I/J | ±(0.1%Span)/16MPa |
Overvoltage Effect
| Range code | Impact |
| A | ±0.5%×Span/4MPa |
| B/C/D/E | ±0.2%×Span/16MPa |
| F/G/H/I/J | ±0.1%×Span/16MPa |
Long-term stability
| Range code | Impact | |
| A | ±0.5%×Span/1 | Year |
| B | ±0.2%×Span/1 | Year |
| F/G/H/I/J | ±0.1%×Span/1 | Year |
Power supply impact
±0.001% /10V (12～42V DC), can be ignored.
- Functional specifications
Range and scope
| Range | kPa | |
| A | Range | 0～1 |
| scope | -3000～3000 | |
| B | Range | 1～100 |
| scope | -16000～16000 | |
| C | Range | 100～500 |
| scope | -16000～16000 | |
| D | Range | 500～3000 |
| scope | -16000～16000 | |
| E | Range | 3000～4000 |
| scope | -16000～16000 | |
| F | Range | 4000～10000 |
| scope | -16000～16000 | |
| G | Range | 1～100 |
| scope | 16000～30000 | |
| H | Range | 100～500 |
| scope | 16000～30000 | |
| I | Range | 500～3000 |
| scope | 16000～30000 | |
| J | Range | 3000～4000 |
| scope | 16000～30000 | |
Range limit
It can be adjusted arbitrarily within the upper and lower limits of the measuring range.
It is recommended to select a range code with the lowest possible turndown ratio to optimize performance characteristics. Zero setting
The zero point and span can be adjusted to any value within the measuring range in the table, as long as: the calibration span ≥ the minimum span
Installation location affects
The change of the installation position parallel to the diaphragm surface will not cause zero drift. If the installation position changes more than 90° from the diaphragm surface, a zero position effect within the range of <0.4kPa will occur, which can be corrected by adjusting the zero. No range effect.
Output
Two-wire system, 4mA~20mADC, optional HART output digital communication, optional linear or square root output. Output signal limit: Imin=3.9mA, Imax=20.5mA
Response time
The amplifier component damping constant is 0.1s; the sensor time constant is 0.1s to 1.6s, depending on the range and range ratio. The additional adjustable time constant is: 0.1s to 60s. The impact on non-linear outputs (such as square root function) depends on this function and can be calculated accordingly.
Warm-up time
＜15s
Ambient temperature
-40℃～85℃
With LCD display and fluoro rubber seal -20℃～65℃ Storage temperature/transportation temperature
-50℃～85℃; with LCD display: -40℃～85℃ Work Pressure
Rated working pressure is divided into three levels: 16MPa, 25MPa, 40MPaStatic pressure limit
From 3.5kPa absolute pressure to rated pressure, the protection pressure can be greater than 1.5 times the rated pressure and applied to both sides of the transmitter at the same time.One-way overload limit:
One-way overload up to rated pressureElectromagnetic compatibility (EMC)
See the Electromagnetic Compatibility Appendix on the next page
- Install
Power supply and load conditions
The power supply voltage is 24V, R≤(Us-12V)/Imax kΩ, where Imax=23 mA
Maximum power supply voltage: 42VDC
Minimum power supply voltage: 12VDC, 15VDC (backlit LCD display) Digital communication load range: 250Ω～600Ω
Electrical Connections
M20×1.5 cable gland, terminal block is suitable for wires of 0.5mm2~2.5mm2.Process connection
Both ends of the process connection flange have NPT 1/4 and UNF 7/16" internal threads.
- Physical specifications
Material
Measuring membrane box: stainless steel 316L
Diaphragm: Stainless steel 316L, Hastelloy C Process flange: Stainless steel 304
Nuts and bolts: Stainless steel (A4) Filling fluid: Silicone oil
Sealing ring: Nitrile rubber (NBR), fluororubber (FKM), polytetrafluoroethylene (PTFE) Transmitter housing: Aluminum alloy, with epoxy resin sprayed on the surface
Shell seal: Nitrile rubber (NBR) Nameplate: Stainless steel 304
weight: 3.3kg (without: LCD display, mounting bracket, process connection)
Enclosure protection gradeIP67
Electromagnetic compatibility table
| Serial number | Test items | Basic Standards | Test conditions | Performance level |
| 1 | Radiated interference (housing) | GB/T 9254-2008 Table 5 | 30MHz～1000MHz | qualified |
| 2 | Conducted interference (DC power port) | GB/T 9254-2008 Table 1 | 0.15MHz～30MHz | qualified |
| 3 | Electrostatic Discharge (ESD) Immunity | GB/T 17626.2-2006 | 4kV (contact) 8kV (air) | B |
| 4 | Radio frequency electromagnetic field immunity | GB/T 17626.3-2006 | 10V/m(80MHz～1GHz) | A |
| 5 | Power frequency magnetic field immunity | GB/T 17626.8-2006 | 30A/m | A |
| 6 | Electrical fast transient burst immunity | GB/T 17626.4-2008 | 2kV(5/50ns,5kHz) | B |
Note 1: A performance level description: When tested, performance is normal within the technical specification limits.
Note 2: Description of performance level B: During the test, the function or performance is temporarily reduced or lost, but it can recover by itself, and the actual operating status, storage and data are not changed.
DimensionsUnit is mm
