Data sheet
Pressure transmitters for CO2 food retail applications
MBS 8250
MBS 8250 is a series of compact pressure
transmitters developed and thoroughly tested to
ensure excellent operation in CO
It monitors the suction and discharge pressure
in a CO
sub- and transcritical cycle and oers a
2
reliable pressure measurement.
The technology combining piezo resistive sensor
element and programmable gain ampliers
makes the MBS 8250 the obvious choice for
applications demanding highest accuracy and
insensitiveness like controlling the pressures
in CO
applications. Further this technology
2
enhances the functional safety by limiting the
output signal at excess pressure conditions, it
allows excellent sink/source capabilities and it
leave the pressure transmitters unaected by
electromagnetic elds up to 100 V/m.
MBS 8250 with integrated pulse-snubber is
designed for protection against cavitation,liquid
hammering and pressure peaks.
applications.
2
Features
Approvals
• Designed for use in CO
industrial environments
• EMC protection 100 V/m up to 2 GHz;
20 V/m up to 4 GHz
• For media and ambient temperatures up to
125 °C
• 3.3 mA sink / source
• Reverse polarity protected
UL 508: Industrial control equipment,
le no. E311982
UL 873: Temperature indicating equipment,
le no. E31024
UL 1604 Hazloc: Class I, Div. 2, Group A, B, C and D,
le no. E227388
CRN 0F18477.5CL
plants and demanding
2
• Version with integrated pulse-snubber.
Protected against cavitation, liquid hammering
and pressure peaks
• Enclosure and wetted parts of AISI 316L
• Digitally temperature calibrated
• Self-diagnostic features on demand
(with output clipping)
• RoHS conformity
IC.PD.P21.I4.02 | 520B7845 | 1© Danfoss | DCS (im) | 2017.03
Data sheet | Pressure transmitters for CO2 food retail applications, MBS 8250
MBS 8250
Pulse-snubber
Technical data
Application
Cavitation, liquid hammer and pressure peaks may
occur in CO
systems with changes in the ow
2
velocity of the gas e.g. fast closing of a valve or
The media viscosity has only little eect on the
response time. Even with CO
response time will not exceed 35 ms
(liquid state < 4ms).
compressor starts and stops.
The problem may occur on the inlet and outlet
side, even at rather low operating pressures.
Performance (EN 60770)
Accuracy @ 25 °C (incl. non-linearity, hysteresis and repeatability) ± 0.5% FS (max.)
Non-linearity BFSL (conformity) ≤ ± 0.2% FS
Hysteresis and repeatability ≤ ± 0.1% FS
Total error band inside the compensated temperature range ≤ ± 1% FS
Response time MBS 8250
(10 – 90%)
Overload pressure (static) 6 × FS
Burst pressure > 6 × FS
Durability, P: 10 – 90% FS > 10 × 10
Liquids with viscosity < 100 cSt < 4 ms
Air and gases < 35 ms
6
cycles
in gas form, the
2
Electrical specifications
Nom. output signal
(short-circuit protected)
Supply voltage [U
], polarity protected
B
Supply – current consumption – ≤ 6 mA
Supply voltage dependency ≤ ± 0.05% FS / 10 V –
Current limitation 22 mA ± 0.5 mA –
Sink / source – 3.3 mA
Output impedance – ≤ 25 Ω
Max load [R
] (load connected to 0 V) RL ≤ (U
L
4 – 20 mA (2-wire) Ratiometric 10 – 90% of supply
9 – 32 V DC
> 32 V: Contact Danfoss
- 9 V) / 0.02 A RL ≥ 1.5 kΩ
B
5 V DC ± 0.5 V
© Danfoss | DCS (im) | 2017.032 | 520B7845 | IC.PD.P21.I4.02
Data sheet | Pressure transmitters for CO2 food retail applications, MBS 8250
Technical data
(continued)
Environmental conditions
Media temperature range -40 – 125 °C
Ambient temperature range See page 6
Storage temperature -50 – 125 °C
EMC - Emission EN 61000-6-3
EMC Immunity
Surge protection 1 Kv @ 42 Ω; Line-Earth and Line-Line EN 61000-6-2
Insulation resistance > 100 MΩ at 500 V DC
Vibration stability
Shock resistance
Enclosure IP67
20 V/m, 80 MHz – 4 GHz EN 61000-6-2
100 V/m, 20 MHz – 2 GHz ISO 11452-2
Sinusoidal
Random 11 g
Shock 500 g / 1ms IEC 60068-2-27
Free fall 1 m IEC 60068-2-32
15.9 mm-pp, 5 Hz – 25 Hz
25 g, 25 Hz – 2 kHz
, 5 Hz – 1 kHz (3 × 8 h) IEC 60068-2-64
rms
IEC 60068-2-6
Mechanical characteristics
Wetted parts EN 10088-1; 1.4404 (AISI 316 L)
Materials
Net weight (depending on pressure connection) < 0.07 kg
Enclosure EN 10088-1; 1.4404 (AISI 316 L)
Pressure connection EN 10088-1; 1.4404 (AISI 316 L)
Electrical connections Glass filled polyamide, PA 6.6 Sn-coated contacts
Compensated temperature range: -20 – 100 °C.
Thermal shift outside the compensated temperature range: ≤ ± 0.2% FS / 10 °K
© Danfoss | DCS (im) | 2017.03
IC.PD.P21.I4.02 | 520B7845 | 3
Data sheet | Pressure transmitters for CO2 food retail applications, MBS 8250
Ordering
MBS 82
Type Gasket
With pulse snubber.
Measuring range Pressure connection
-1 – 59 bar
-1 – 99 bar
-1 – 159 bar
Compensated
temperature range
-20 – 100 °C 33
Pressure reference
Absolute
– – –
5 0
95 G B 0 4
96 A C 0 4
97
0
No gasket
1
Gasket, Viton, media temp. - 20 – 125 °C
G ¼, DIN 3852-E / ISO 1179-2
¼ – 18 NPT, ANSI/ASME B 1.20.1
B D 0 8
F A 0 8
⁷⁄₁₆ – 20 UNF-2A, ISO 11926-2
M14 × 1.5, ISO 6149-2
Electrical connection (connections see page 4)
C 2
Round Packard Metri-Pack, 3-pin, male, excl. female plug
2
1
6
Please contact your local
Danfoss oce for further
Output signal
4 – 20 mA
Ratiometric, 10 – 90%
information or request on other
versions.
Dimensions/Combinations
Type code C2
Electrical connection Round Packard Metri-Pack
Housing:
ø = 19 mm
Preferred versions
Pressure connection
22 mm
G¼ – DIN 3852-E
Gasket: DIN 3869-14 ¼ – 18 NPT
⁷⁄₁₆ – 20 UNF-2A
O-ring
M14 × 1,5 – ISO 6149-2
O-ring
Type code GB04 AC04 BD08 FA08
2
Recommended torque
2
) Depends of dierent parameters as packing material, mating material, thread lubrication and pressure level.
) 30 – 35 Nm
2 – 3 turns after finger
teightend
30 – 35 Nm 30 – 35 Nm
© Danfoss | DCS (im) | 2017.034 | 520B7845 | IC.PD.P21.I4.02
Electrical connections
Type code C2
Round Packard
Metri-Pack, male
Ambient
temperature
Enclosure (IP protection fulfilled
together
with mating connector)
Materials
Electrical
connection
4 – 20 mA - 40 – 105 °C
Ratiometric - 40 – 125 °C
4 – 20 mA
(2 wire)
Ratiometric
IP67
Glass filled polyamide,
PA 6.6
Sn-coated contacts
Pin1(A): ÷ supply
Pin 2(B): + supply
Pin 3(C): not used
Pin 1(A): ÷ supply
Pin 2(B): + supply
Pin 3(C): output
© Danfoss | DCS (im) | 2017.03 IC.PD.P21.I4.02 | 520B7845 | 5
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