Microsensor Corp MDM3051SDGP Intelligent Pressure Transmitter

Microsensor Corp MDM3051SDGP Intelligent Pressure Transmitter series Bracket Installation Gauge Pressure Transmit t er is used for level, density, and pressure measurement of liquid, gas, and steam. Then it will output a 4mA~20mA DC HART signal and also it could be connected to MS-HART375 hand communicator or RSM295 Modem to do the specification setting and process control.

Differential pressure transmitter includes two functional units:

Main unit
Auxiliary unit

The main unit includes a sensor and process connection, working principle as followed:

The sensor module uses whole welded technology, in which has a compact overload diaphragm, a differential pressure sensor, and a temperature sensor. The temperature is taken as a reference for temperature compensation.

The positive end of the differential pressure sensor is connected with a high-pressure chamber of the sensor capsule; the negative end is connected with the low-pressure chamber of the sensor capsule.

Through the isolated diaphragm and filling liquid, the differential pressure is transmitted to the silicon die in the inner of the differential pressure sensor, which makes the resistor of the sensor die change. So the detection system outputs a different voltage. The output voltage is in proportion to the pressure variation, and then it is transmitted to standard output by adapter and amplifier.

Microsensor Corp MDM3051SDGP Specification

(Standard zero as the reference calibration range, Stainless steel 316L diaphragm, filling liquid is silicone oil)

Performance Specification

Reference Basic error for range calibration
(including linearity, hysteresis, and repeatability from zero): ± 0.075%)
If TD>10(TD=Max. Pressure range/calibration range), the Basic error is ± (0.0075×TD)%

Environmental Temperature Effect

Range code	-20℃ ~65℃ Total effect value
1B	±(0.30×TD+0.20)%×Span
other	±(0.20×TD+0.10)%×Span
Range code	-40℃ ~ -20℃ and 65℃ ~85℃ Total effect value
1B	±(0.30×TD+0.20)%×Span
others	±(0.20×TD+0.10)%×Span

Over range effect: ±0.075%×Span

Long-term stability

Range code	Effect value
1B	±0.2%×Span/1 year
other	±0.1%×Span/1 year

Power effect

±0.001% /10V(12V~42V DC), negligible.

Microsensor Corp MDM3051SDGP Functional Specification

range/limits		mbar/bar
	range	(6~60)mbar
1B	limits	(-60~60)mbar
	range	(0.02~0.4)bar
1C	limits	(-0.4~0.4)bar
	range	(0.025~2.5)bar
1D	limits	(-1~2.5)bar
	range	(0.3~30)bar
1F	limits	(-1~30)bar
	range	(1~100)bar
1G	limits	(-1~100)bar
	range	(2.1~210)bar
1H	limits	(-1~210)bar
	range	(4~400)bar
1I	limits	(-1~400)bar

Pressure range limit

The pressure is adjustable within the upper and lower limit.

It is recommended to choose the range code with the lowest pressure range proportion to optimize the performance specification.

Zero setting

The zero and pressure range could be adjusted to any value within the measured range in the table, only the calibrated range≥Min.Range is valid.

Mounting position effect

The change of mounting position parallel to the diaphragm could not influence the zero drift. If the angle between mounting position and diaphragm is over 90°, the zero drift is<0.4kPa which could be calibrated by zero settings. No effect on pressure range.

Microsensor Corp MDM3051SDGP Output

2-wire,4mA~20mA DC, HART communication protocol, linearity or square root output optional. Output signal limit: Imin=3.9mA, Imax=20.5mA

Response time

The damping constant of amplifier parts is 0.1s, the time constant of the sensor is 0.1s~1.6s, which is depend on the pressure range and pressure range proportion. The additional adjustable time constant is 0.1s~60s.

Warm-up time : < 15s