DatasheetDynisco MDT4X0F Two-Wire Melt Pressure Transmitters with Auto-Zero
The new Dynisco MDT4X0F pressure transmitter series is designed for reliable use in critical industrial environments with high electrical noise levels. Even with unshielded cables, the 4–20 mA signal can be transmitted reliably over long distances. The applied process pressure is converted into a proportional current signal by the integrated two-wire amplifier.
A key benefit of the MDT4X0F series is the “Auto-Zero” function. Zero adjustment can be initiated directly via a push button on the transmitter or externally from the control room or central control system. The series features a rigid stem between the diaphragm and housing, a smooth flush diaphragm and an integrated electronic span calibration function.
| Technical Specifications | |
|---|---|
| Pressure Ranges | 0–17 bar to 0–2,000 bar |
| Accuracy MDT420F | ±0.5% FSO (up to 50 bar ±1% FSO) |
| Accuracy MDT460F | ±1% FSO |
| Repeatability MDT420F | ±0.1% FSO (up to 50 bar ±0.2% FSO) |
| Repeatability MDT460F | ±0.2% FSO |
| Resolution | Infinite |
| Maximum Overpressure | 2× pressure range; for 1,000 and 1,400 bar ranges max. 1,750 bar; for 2,000 bar range max. 2,450 bar |
| Burst Pressure | 6× pressure range, max. 3,000 bar |
| Wetted Material | 15-5 PH stainless steel, material no. 1.4545, DyMax™ coated |
| Sensing Element | Four-arm strain gauge bridge |
| Internal Calibration Point | 80% of full scale ±1% |
| Output Signal | Two-wire 4–20 mA |
| Supply Voltage | 12–36 VDC |
| Zero Adjustment | Via “Auto-Zero” adjustment function |
| Auto-Zero Start | Locally by push button on the transmitter or externally by shorting the “NP” and “GND” wires |
| Span Calibration | Via 80% FSO calibration value |
| Load Resistance | 1,200 Ω at 36 VDC, 500 Ω at 24 VDC |
| Insulation Resistance | 1,000 MΩ at 50 VDC |
| Failure Signal Output | According to NAMUR recommendation NE 43: ≤ 3.6 mA or ≥ 21 mA |
| Maximum Diaphragm Temperature | 400 °C |
| Maximum Housing Temperature | 85 °C |
