Danfoss EMP 2 Data sheet
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 oers a reliable
pressure measurement, even under harsh
environmental conditions.
The exible 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 inuences
like cavitation, liquid hammer or pressure
peaks.
Features
• For use in Zone 2 explosive atmosphere
AI175686432328en-000901
1234Surge damper
Pump
Valve
Tank
Sensor temperature range
Normal
-10 – 70 °C, (Ref.
Figure 2: Max. ambient temperature as a function of
temperature)
ATEX Zone 2
-10 – 85 °C
Transport / storage temperature
-50 – 70 °C
Media temperature
-40 – 100 °C, (Ref.
Figure 2: Max. ambient temperature as a function of
temperature)
Media
Water, fuel, oil, lubricating oil, refrigerants, ammonia, gas etc.
Voltage supply
Max. 32 V and min. 12 V DC between terminals N and P
Load resistance
A. max. 410 Ω at 24 V DC 50% / -20%
B. max. 650 Ω at 24 V DC 50% / 0%
Zero point adjustment
- 5 – 20% range span; but max. -1–1.5 bar (kp/cm
2
)
Span adjustment
± 5% of range span; max. ± 5 bar (kp/cm
2
)
Combination of span and zero point adjustments
- 5 – 20% of range span
Noise – immunity
Complies with the standard for industrial apparatus EN 61000-6-2. The standard
contains tests for the following: HF elds, mains transmitted HF, voltage transients, electrostatic immunity, supply voltage variations, low-frequency radiation
and transient protection in accordance with Germanischer Lloyd
Noise – emission
Complies with standard EN 61000-6-3
Accuracy
< 0.3 % of FS
In vacuum (below 0 bar)
< 2.3 % of FS
Temperature dependence
Thermal zero point shift
≤ ± 0.06 % FS / °C
Thermal sensitivity (span) shift
≤ ± 0.06 % FS / °C
Voltage dependence
≤ ± 0.1% FS / 10 V
Vibration stability
3 – 30 Hz amplitude 1.13 mm and 30 – 300 Hz acceleration 4G according to IEC
60068-2-6. The requirements of the ship classication societies are up to 100 Hz,
acceleration 4G. Extended specications by prior arrangement
Time constant
Liquids with viscosity < 100 cSt
< 4 ms
Air and gas in combination with pulse
snubber:
< 35 ms
Shock stability
500 g for 1 ms to IEC 60068-2-27
Pressure transmitter, Type EMP 2
Applications
Application and media conditions
Figure 1: Pressure range
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 exible 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 specication
Technical data
Table 1: Performance (EN 60770)
© Danfoss | Climate Solutions | 2021.02 AI175686432328en-000901 | 2
A
D
B
C
ABCDAmbient temperature
Temperature and medium
Operating range
Transport and storage temperature
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
Zone 2 applications
(1)
EN60079-0; EN60079-15
Pressure transmitter, Type EMP 2
Table 2: Explosive atmospheres
(1)
(1)
When used in ATEX Zone 2 areas at temperatures <-10 °C the cable and plug must be protected against impact
When used in ATEX Zone 2 areas at temperatures <-10 °C the cable and plug must be protected against impact
Identication
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
Mounting
Type EMP 2 is equipped with a 3 mm stell bracket for mounting.
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 at, 14 mm across ats.
When tting or removing pressure lines, the spanner ats on the pressure connector should be used to apply
counter-torque.
© Danfoss | Climate Solutions | 2021.02 AI175686432328en-000901 | 3
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