Data Sheet
Pressure transmitter
Type EMP 2
For monitoring and control in marine and industial applications
The high accuracy pressure transmitter EMP 2 is designed for monitoring and control in marine and industial applications and offers a reliable pressure measurement, even under harsh environmental conditions.
The flexible pressure transmitter programme covers absolute or gauge (relative) versions with zero and span adjustment with a 4 – 20 mA output signal.
It has all the necessary marine approvals. Special versions with integrated pulse-snubber available, designed for use in hydraulic applications with severe medium influences like cavitation, liquid hammer or pressure peaks.
Features
• For use in Zone 2 explosive atmosphere
AI175686432328en-000901
Pressure transmitter, Type EMP 2
Applications
Application and media conditions
Figure 1: Pressure range
1Surge damper
2Pump
3Valve
4Tank
In cases where valves are closed momentarily, surges of a value in excess of that for which the pressure element is designed can occur. To avoid damage to the pressure element, a damper should be „tted.
The device can consist of a flexible pipe, a throttle, a shock valve, or a combination of these items. The amplitude of surges should never exceed the maximum pressure range of the pressure transmitter.
Product speci€cation
Technical data
Table 1: Performance (EN 60770)
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Normal |
-10 – 70 °C, (Ref. Figure 2: Max. ambient temperature as a function of |
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Sensor temperature range |
temperature) |
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ATEX Zone 2 |
-10 – 85 °C |
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Transport / storage temperature |
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-50 – 70 °C |
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Media temperature |
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-40 – 100 °C, (Ref. Figure 2: Max. ambient temperature as a function of |
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temperature) |
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Media |
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Water, fuel, oil, lubricating oil, refrigerants, ammonia, gas etc. |
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Voltage supply |
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Max. 32 V and min. 12 V DC between terminals N and P |
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Load resistance |
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A. max. 410 Ω at 24 V DC 50% / -20% |
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B. max. 650 Ω at 24 V DC 50% / 0% |
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Zero point adjustment |
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- 5 – 20% range span; but max. -1–1.5 bar (kp/cm2) |
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Span adjustment |
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± 5% of range span; max. ± 5 bar (kp/cm2) |
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Combination of span and zero point adjustments |
- 5 – 20% of range span |
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Complies with the standard for industrial apparatus EN 61000-6-2. The standard |
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Noise – immunity |
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contains tests for the following: HF „elds, mains transmitted HF, voltage transi- |
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ents, electrostatic immunity, supply voltage variations, low-frequency radiation |
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and transient protection in accordance with Germanischer Lloyd |
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Noise – emission |
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Complies with standard EN 61000-6-3 |
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Accuracy |
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< 0.3 % of FS |
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In vacuum (below 0 bar) |
< 2.3 % of FS |
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Temperature dependence |
Thermal zero point shift |
≤ ± 0.06 % FS / °C |
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Thermal sensitivity (span) shift |
≤ ± 0.06 % FS / °C |
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Voltage dependence |
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≤ ± 0.1% FS / 10 V |
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3 – 30 Hz amplitude 1.13 mm and 30 – 300 Hz acceleration 4G according to IEC |
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Vibration stability |
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60068-2-6. The requirements of the ship classi„cation societies are up to 100 Hz, |
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acceleration 4G. Extended speci„cations by prior arrangement |
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Liquids with viscosity < 100 cSt |
< 4 ms |
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Time constant |
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Air and gas in combination with pulse |
< 35 ms |
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snubber: |
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Shock stability |
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500 g for 1 ms to IEC 60068-2-27 |
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© Danfoss | Climate Solutions | 2021.02 |
AI175686432328en-000901 | 2 |
Pressure transmitter, Type EMP 2
Enclosure |
IP65, Housings are made of enamelled pressure-die-cast aluminium (GD-AISI 12) |
Pressure connection |
G ¼, G ½ A standard, G ⅜ A mano |
Net weight |
approx. 1 kg |
Cable entry |
Pg 13.5 for cable diameters 5 – 14 mm |
Table 2: Explosive atmospheres |
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Zone 2 applications(1) |
EN60079-0; EN60079-15 |
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(1) When used in ATEX Zone 2 areas at temperatures <-10 °C the cable and plug must be protected against impact
Identi€cation
The type designation and code number of the transmitter is embossed on the side of the housing at the bottom close to the pressure connector.
Installation conditions
Figure 2: Max. ambient temperature as a function of temperature
A |
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C |
D |
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B |
Mounting
Type EMP 2 is equipped with a 3 mm stell bracket for mounting.
AAmbient temperature
BTemperature and medium
COperating range
DTransport and storage temperature
Pressure connection
Connector with outside cylindrical thread G ½, some types available with G ⅜ A mano, and inside cylindrical thread G ¼, to ISO 228.
The primary insertion length of the connector corresponds to EN 837. Connection to the transmitter is made through a connector with a spanner flat, 14 mm across flats.
When „tting or removing pressure lines, the spanner flats on the pressure connector should be used to apply counter-torque.
© Danfoss | Climate Solutions | 2021.02 |
AI175686432328en-000901 | 3 |
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