Emerson Process Management Dvs205 Users Manual HART Interface Module

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2.5:DVS205
January 2009

Specification Sheet

DVS205 Dual-Variable Sensor
The DVS205 Dual-Variable Sensor (DVS) provides
static pressure and differential pressure inputs to a
FloBoss™ 103, FloBoss 107E, or FloBoss 500-Series
Flow Manager. The DVS205 communicates via a
serial format with the FloBoss.

Variables
Functionally, the DVS is a digital transmitter that
measures two flow-related variables simultaneously:
differential pressure and static pressure. These
variables are continuously available to the FloBoss
unit that polls the DVS.

Transducer and Electronics
The DVS contains a transducer and an electronics
circuit. The transducer uses capacitance-cell
technology to sense differential pressure and
piezoresistive technology to sense the static
(absolute or gauge) pressure.
The transducer electronics convert the pressure
variables directly into a digital format, allowing

accurate correction and compensation. A
microprocessor linearizes and corrects the raw
pressure signals (from the sensor) using
characterization data stored in non-volatile memory.
The electronics also allow the DVS to communicate
with a FloBoss using a Serial Peripheral Interface
(SPI).

Accuracy
Two versions of the DVS transmitter are available:
ƒ DVS205P with reference accuracy of 0.075% of
the full span.
ƒ DVS205E with reference accuracy of 0.10% of
the full span.

Mounting
The DVS is factory installed on a FloBoss™ 103,
FloBoss 107E, or FloBoss 500-Series Flow Manager
to comply with agency requirements. Attached to the
bottom of the sensor body is a Coplanar™ flange.
This flange allows the DVS to mount on an integral
orifice assembly or manifold valve.

Coupling

Sensor Body

DVS205 Dual-Variable Sensor

Remote Automation Solutions
Website: www.EmersonProcess.com/Remote

D301569X012

Coplanar
Flange

2.5:DVS205
Page 2

Specification Sheet
DVS205 Dual-Variable Sensor Specifications
DIFFERENTIAL PRESSURE INPUT
Range1: (100:1 rangeability allowed)
0 to 62.2 kPa (0 to 250" H2O).
0 to 248.8 kPa (0 to 1000" H2O).
Reference Accuracy:
±0.10% of span for turndowns from 1:1 to 10:1 of
URL (DVS205E).
±0.075% of span for turndowns from 1:1 to 10:1 of
URL (DVS205P).
For spans less than 10:1 turndown:
Accuracy = ±[0.025 + 0.005(URL/Span)]% of
span.
Stability: ±0.125% of URL for five years for ±50°F
(28°C) ambient temperature changes, and up to
1000 psi (68,9 bar) line pressure.
Ambient Temperature Effect per 50°F (28°C):
±(0.025% URL + 0.125% of span) spans from 1:1
to 30:1.
±(0.035% URL + 0.175% of span) spans from
30:1 to 100:1.
Static Pressure Effects:
Zero error = ±0.05% of URL per 1000 psi (68,9
bar).
Span error = ±0.20% of DP Reading per 1000 psi
(68,9 bar).
Over-Pressure Limit: 3,626 psi (250 bar) applied
on either or both sides without damage to the
sensor.
Burst Pressure Limit: 10,065 psi (694 bar).
STATIC PRESSURE INPUT
Range: Either Absolute or Gauge (100:1
rangeability allowed):
0 to 5516 kPa (0 to 800 psia/psig).
0 to 25,000 kPa (0 to 3626 psia/psig).
Reference Accuracy:
±0.10% of span for turndowns from 1:1 to 10:1 of
URL (DVS205E).
±0.075% of span for turndowns from 1:1 to 10:1 of
URL (DVS205P).
For spans less than 10:1 turndown:
Accuracy = ±[0.03 + 0.0075(URL/Span)]% of
span.

STATIC PRESSURE INPUT (continued)
Stability: ±0.125% of URL for five years for ±50°F
(28°C) ambient temperature changes.
Ambient Temperature Effect per 50°F (28°C):
±(0.05% URL + 0.125% of span) spans from 1:1
to 30:1.
±(0.06% URL + 0.175% of span) spans from 30:1
to 100:1.
Over-Pressure Limit: Same as URL.
POWER
Input at 0 to 75°C (32 to 167°F): 8 to 30 V dc, 10
mW average.
Input at –40 to 0°C (–40 to 32°F): 8.5 to 30 V dc,
10 mW average.
OUTPUT
Serial Peripheral Interface (SPI).
WEIGHT
3.0 kg (6.7 lb).
ENVIRONMENTAL
Same as the FloBoss unit in which it is installed.
Process Seals per ANSI/ISA 12.27.01
Meets requirements for a Single Seal device as
defined by ANSI/ISA 12.27.01. Installation must
adhere to the following process temperature limits.
Process Temperature (at transmitter isolator flange):
Standard Silicone Fill Sensor: -40 to 100°C (-40 to
212°F).
Inert Fill Sensor: -18 to 85°C (0 to 185°F).
Note: Process temperatures above 85°C (185°F)
require you to lower the product’s maximum ambient
temperature rating by a 1.5:1 ratio. To determine the
adjusted maximum temperature rating, perform the
following calculation:
Adjusted max Tamb = Product Max Tamb - [(Actual
Process Tamb - 85°C (185°F)) * 1.5].
Example:
Adjusted Max Tamb = 75°C – [(95°C – 85°C) * 1.5]
= 60°C.
DIMENSIONS
147 mm H by 163 mm W by 84 mm D (5.8 in. H by
6.4 in. W by 3.3 in. D).
VIBRATION EFFECT
Sensor outputs will not shift more than +0.1% of
URL per g from 5 to 2000 Hz in any axis when
tested per IEC 770, Section 6.2.14.

1. Consult factory for special ranges and materials which may be available. For example: 0 to 6.22 kPa (0 to 25" H2O) at ±0.10% reference accuracy.

2.5:DVS205
Page 3

Specification Sheet
DVS205 Dual-Variable Sensor Specifications (continued)
CONSTRUCTION
Standard: Transducer is all stainless steel
construction with silicone fill fluid, 316L
diaphragms and glass-filled PTFE o-rings.
Coupling is A360 Aluminum with urethane coating.
Optional: Transducer includes Hastelloy C-276
wetted parts (construction is NACE compliant per
MR0103 and ISO15156/MR0175), inert fill fluid.
Coupling is available in 316 stainless steel
(CF8M).

MOUNTING
Factory-installed on enclosure of FB103, FB107E,
and FB503. See respective specification sheet for
unit mounting options.
CONNECTIONS
Process: 1/4-18 NPT on 2-1/8 inch centers (on
coplanar flange).
APPROVALS
Same as the FloBoss unit in which it is installed.

Specification Sheet

2.5:DVS205
Page 4

Bristol, Inc., Bristol Canada, BBI SA de CV and Emerson Process Management Ltd, Remote Automation Solutions division (UK), are wholly
owned subsidiaries of Emerson Electric Co. doing business as Remote Automation Solutions (“RAS”), a division of Emerson Process
Management. FloBoss, ROCLINK, Bristol, Bristol Babcock, ControlWave, TeleFlow and Helicoid are trademarks of RAS. AMS, PlantWeb and
the PlantWeb logo are marks of Emerson Electric Co. The Emerson logo is a trademark and service mark of the Emerson Electric Co. All
other marks are property of their respective owners.
The contents of this publication are presented for informational purposes only. While every effort has been made to ensure informational
accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein
or their use or applicability. RAS reserves the right to modify or improve the designs or specifications of such products at any time without
notice. All sales are governed by RAS’ terms and conditions which are available upon request. RAS does not assume responsibility for the
selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any RAS product remains solely
with the purchaser and end-user.
Emerson Process Management
Remote Automation Solutions
Marshalltown, IA 50158 U.S.A.
Houston, TX 77041 U.S.A
Pickering, North Yorkshire UK Y018 7JA
© 2008-2009 Remote Automation Solutions, division of Emerson Process Management. All rights reserved.



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