Monosilicon differential pressure transmitter
PPT-DT Series monosilicon pressure transmitter is a high performance pressure transmitter with international leading technologymeticulously designed by Pyrotech company, using the world's most advanced monosilicon pressure sensor technology andpatent encapsulation technology. Monosilicon pressure sensor locates on the top of the metal body and stay away from themedium interface to realizes mechanical isolation and thermal isolation. Glass sintering sensor wire realizes high strengthelectical insulation of metal base and improves the capability of flexibility of electronic circuit and transient voltageresistance protection. All these original encapsulation technologies enable PPT-DT to easily cope with extreme chemicaloccasion and mechanical load, and own strong resistance to EMI, sufficient to respond to the most igorous industrial environment applications, which are the genuine invisible instruments.
Main parameters
Pressure types | Absolute pressure |
Measuring range | 40kPa-10MPa, please refer to the ordering information chapter |
Output signal | 4-20mA, 4-20mA+HART, customer |
Reference accuracy | ±0.2% URL, 土0.5% URL |
Field of application
Pressure, level, differential pressure, density, interface,flow
Measuring medium
Viscous, paste-like, adhesive, crystallising,particulatescontaining and contaminated media
Approvals
Measuring range and limit
Nominal value | Smallest calibratable span | Lower range limit(LRL) | Upper range limit(URL) | Static pressurelimit* | High pressure sideoverload limit* | Low pressure sideoverload limit* |
40kPa | 4kPa | -40kPa | 40kPa | 10MPa | 10MPa | 10MPa |
250kPa | 25kPa | -250kPa | 250kPa | 10MPa | 10MPa | 10MPa |
1MPa | 100kPa | -500kPa | 1MPa | 10MPa | 10MPa | 10MPa |
Adjustrequirements: lower range value (LRV)and upper range value (URV)can be adjusted within the scope of the upper andlower range limit, when| URV|2|LRV | , needs| URV|2smallest calibratable span; when |URV|≤|LRV ], needs|LRV |2smallest calibratable span |
*Limit value of overpressure: depends on the pressure value of the parts with lowest pressure capacity |
Standard specifications and reference conditions
Test standard: GB/T28474/IEC60770; Zero based-calibration span, silicon oil filling,316L stainless steelisolated diaphragm, 4-20mA analog output.
Performance specifications
The overall performance including but not limited to【Reference accuracy】,【Environment temperatureeffects) , 【Static pressure effects】 and other comprehensive error |
Typical accuracy: +0.2%URL |
Stability: 主0.2% URL/ 5 years |
Reference accuracy
Including linearity(BFSL), hysteresis and repeatability.calibration temperature: 20 ℃土5 ℃ |
Linear output accuracy | TD≤10(Note1) | ±0.2%URL | Nominal value: 40kPa, 250kPa 1MPa |
10<TD<20 | ±0.5TD% URL |
Square root output accuracy is 1.5 times linear outputaccuracy |
Note 1: TDis Turn down when | URV |≥| LRV I, TD=URL/ | URV | when | URV |≤| LRV l,TD=URL/ | LRV | |
Ambient temperature effects
within the range - 20-80 ℃total impact
±(0.1+0.1TD)% URL
Static pressure effects
Effect on zero | ±0.15TD % URL/4MPa |
Effect on full scale | ±0.2% URL/4MPa |
Power supply effects
When power supply voltage is within 10.5/16.5-55VDC,zero and span change should not more than ±0.005%URL/V
Mounting position effects
lnstall error less than 400Pa, which can be corrected byPV=0 reset.
Vibration effects
According to GB/T1827.3/IEC61298-3,<0.1%URL
Output signal
Two wire 4-20 mA output with digital communications,linear or square root output programmable, HART protocol is superimposed on the 4-20mA signal.
Damping time
Total damping time constant: equal to the sum of damping time of amplifer and sensor capsule |
Damping time of amplifer: 0-100S adjustable |
Diaphragm capsule (isolated diaphragm and silicon oil filling) damping time: ≤0.2s |
Startup after power off: ≤6S |
Normal services after data recovery: ≤31S |
Weight
Net weight: about 6.35 kg (Tri-clamp process connection,without mounting brackets)
Environment condition
Items | Operational condition |
Working temperature | -40-85℃, integrated LCD display unit: -20- 70℃ |
Storage temperature | -40-110℃, integrated LCD display unit: - 40-85℃ |
Media temperature | With silicon oil: -40-120℃ |
With Neobee M-20:-10-180℃ |
Working humidity | 5-100% RH@40℃ |
Protection class | IP66/IP67 |
Dangerous condition | ExiaIICT4...T6 ExdIICT4...T6 |
*Please consult engineers for details |
Power supply
Item | Operating conditions |
Standard/flame proof | 10.5-55VDC |
HART protocol | 16.5-55VDC, communication load resistance 250Ω |
Load resistance | 0-2119 Ω for working condition, 250- 600Ω for HART protocol |
Transmission distance | <1000meters |
Power consumption | ≤500mW@24VDC, 20.8mA |
Power supply and load requirements
EMC environment
NO. | Test items | Basic standards | Test conditions | Performance level |
1 | Radiated interference | GB/T 9254/CISPR22 | 30MHz-1000MHz | OK |
2 | Conducted interference (DC power port) | GB/T 9254/CISPR22 | 0.15MHz-30MHz | OK |
3 | Electrostatic discharge immunity test (ESD) | GB/T 17626.2/IEC61000-4-2 | 4kV(Contact ),8kV(Air) | B(Note2) |
4 | Immunity to radio frequency EM-fields | GB/T 17626.3/IEC61000-4-3 | 10V/m(80MHz-1GHz) | A(Note1) |
5 | Power frequency magnetic field Immunity test | GB/T 17626.8/IEC61000-4-8 | 30A/m | A(Note1) |
6 | Electrical fast transient / Burst Immunity Test | GB/T 17626.4/IEC61000-4-4 | 2kV(5/50ns,100kHz) | B(Note2) |
7 | Surge immunity requirements | GB/T 17626.5/IEC61000-4-5 | 1kV(Line to line) 2kV(Line to ground) (1.2us/50us) | B(Note2) |
8 | Immunity to conducted disturbances induced by radio frequency fields | GB/T 17626.6/IEC61000-4-6 | 3V(150kHz-80MHz) | A(Note1) |
(Note 1)Performance level A: The preformance within the limits of normal technical specifications. (Note 2)Performance level B: Temporary reduction or loss of functionality or preformance, it can restore itself. The actual operating conditions, storage and data will not be changed. |
Specific menu
Transmission module type
Output signal | Local control | Remote control |
4-20mA+HART | LCD/3 buttons on body | HART |
4-20mA | LCD/3 buttons on body | - |
LCD display unit
Display mode | Details |
PV | Process variable shows on main screen, percentage and progress bar shows on secondary screen |
mA | Current shows on main screen, percentage and progress bar shows on secondary screen |
% | Percentage shows on main screen, percentage and progress bar shows on secondary screen |
Unit
Unit | Definition |
kPa | Kilopascal |
MPa | Megapascals |
bar | Bar |
psi | Pounds per square inch |
mmHg | Millimetre(s) of mercury@0℃ |
mmH2O | Millimeter of water@4℃ |
mH2O | Meter of water@4℃ |
inH2O | Inches of water@4℃ |
ftH2O | Feet of water@4℃ |
inHg | Inches of mercury@0℃ |
mHg | Meter mercury column@0℃ |
TORR | Torr |
mbar | Millibar |
g/cm2 | Gram per square centimeter |
kg/cm2 | Kilogram per square centimeter |
Pa | PA |
ATM | Standard atmospheric pressure |
mm | Millimeter(Note1) |
m | Meter(Note1) |
Note1: length unit need mark medium density |
Measuring menu set
Mark | State |
URV | Upper range value, 20mA |
LRV | Lower range value, 4mA |
Damping time
Analog output type
Parameters | Output type |
mA LINER | Linearity |
mA√ | Square root |
Alarm signal
Parameters | Alarm signal |
ALARM NO | None |
ALARM H | 20.8mA |
ALARM L | 3.8mA |
Fix output
Parameters | Fix output value |
FIX/C NO | None |
3.8000 | 3.8000mA |
4.0000 | 4.0000mA |
8.0000 | 8.0000mA |
12.000 | 12.000mA |
16.000 | 16.000mA |
20.000 | 20.000mA |
20.800 | 20.800mA |
Quick menu
Parameter | Instruction |
PV=0 | Set current output to zero value, used to correct the error cased by static pressure and installation. |
Zero adjustment | 4mA re-range with pressure |
Span adjustment | 20mA re-range with pressure |
Restore factory setting | Restore backup data when error |