DC-EC Series – General purpose DC LV DT
DC-EC Series Rev. 7 www.meas-spec.com 2015-July
1/4
• High level ±10VDC output
• Stroke ranges from ±0.05 to ±10in
• 0.25% linearit y
• Reverse polarity protection
• Double ma g n etic shielding
• Stainless steel housing
• Imperial or metric threaded core
DESCRIPTION
The DC-EC Series DC operated LVDTs combine a computer-designed AC LVDT with custom integral signal
conditioning to achieve premium performance. Operating on a nominal ±15VDC supply, the DC-EC Series
delivers an extremely linear, low noise, yet high frequency response ±10VDC output.
Innovative design and manufacturing techniques further enhance the DC-EC performance and cost efficiency.
The micro-miniature components employed were meticulously selected for maximum stability and thermal
performance. Vacuum encapsulation of all elements affords excellent shock and vibration tolerance, while
double magnetic shielding provides the utmost protection from stray fields.
Like in most of our LVDTs, the DC-EC windings are vacuum impregnated with a specially formulated, high
temper ature, flexib le resin, and the c oil ass embly is po tted insi de its hous ing with a two-com ponent ep oxy. This
provides ex cell ent pr otection against hos ti le en viro nments suc h as high hum idity, vibration and sh ock.
Available in a variety of stroke ranges from ±0.05 to ±10 inches, the DC-EC Series can be configured with a
number of standard options including metric threaded core, guided core and small diameter/low mass core.
Captive core option: The DC-EC features an optional captive core design (available for most models) that
greatl y sim plifies insta llati on. T he cor e rod an d bear in g assem bl y includes a Bronze bearing on the front end for
self-alignment, while a PTFE sleeve allows low-friction travel through the stainless steel boreliner (spool tube).
The core rod and the bearing assembly are both field serviceable.
Also see our other LVDTs with built-in signal conditioning: DC-SE (single-ended DC voltage), HCD (Hermetically
sealed, ±DC vo lta ge) , HC-485 (RS485 digital output), and the HCT (4-20mA, 2-wire loop).
Measurement Specialties, Inc. (NASDAQ MEAS) offers many other types of sensors and signal conditioners.
Data sheets can be downloaded from our web site at: http://www.meas-spec.com/datasheets.aspx
MEAS ac qu ired Sc haevitz Sensors and the SchaevitzTM trademark in 2000.
FEATURES APPLICATIONS
•
Bi-polar DC operation
• Materials testing
•
Shock and vibration tolerant
•
Z-axis position feedback for punch-presses
•
Captive core option
(avail abl e on select models)
•
Microscope X-Y stage position control
•
AISI 400 Series stainless steel housing
•
Medical im aging
•
CE compliant
•
Automotive suspension testing
•
Calibration certificate supplied with each unit
•
Flight simulators
DC-EC Series – General purpose DC LVDT
DC-EC Series Rev. 7 www.meas-spec.com 2015-July
2/4
PERFORMANCE SPECIFICATIONS
ELECT RI CAL SPECI FI CATIONS
Parameter DC-EC 050
DC-EC 125 DC-EC 250 DC-EC 500 DC-EC 1000
DC-EC 2000
DC-EC 3000
DC-EC 5000 DC-EC 10000
Stroke range
±0.050
[±1.27]
±0.125
[±3.17]
±0.25
[±6.35]
±0.5
[±12.7]
±1
[±25.4]
±2
[±50.8]
±3
[±76.2]
±5
[±127]
±10
[±254]
Sensitivity, VDC/inch
200
80
40
20
10
5
3.3
2.0
1.0
Sensitivity, VDC/mm
7.9
3.15
1.6
0.79
0.39
0.20
0.13
0.079
0.039
Frequency response
Hertz @-3dB
500
500
500
200
200
200
200
200
200
Input voltage
±15VDC
Input current
±25mA
Output at stroke ends
±10VDC (Positive and increasing when the core is displaced from null position towards the cable)
Non-linearity
±0.25% of FR, maximum
Output ripple
25mVRMS, maximum
Stability
0.125% of FSO
Output impedance
1 Ohm
ENVIRONMENTAL SPECIFICATIONS & MATERIALS
Operating temperature
+32°F to +160°F [0°C to 70°C]
Survival temperature
-65°F to +200°F [-55°C to 95° C ]
Sho ck sur vival
250 g (11ms half-sine)
Vibration tolerance
10 g up to 2kHz
Housing material
AISI 400 Series stainless steel
Electrical connection
Cable with 4 con du ctors, 28AWG stran ded cop per , braided shield and polyurethane jacket,
39 inches [1 meter] long. Shield is connected to case.
IEC 60529 rating
IP61
Notes:
All values are nominal unless otherwise noted
Dimensions are in inch [mm] unless otherwise noted
FR: Full Range is the stroke range, end to end; FR=2xS for ±S stroke range
FSO (Full Scale Output): Largest absolute value of the outputs measured at the ends of the range
WIRING INFORMATION
DC-EC Series – General purpose DC LVDT
DC-EC Series Rev. 7 www.meas-spec.com 2015-July
3/4
MECHANICAL SPECIFICATIONS – NON-CAPTIVE CORE (STANDARD)
Parameter DC-EC 050
DC-EC 125 DC-EC 250 DC-EC 500 DC-EC 1000
DC-EC 2000
DC-EC 3000 DC-EC 5000 DC-EC 10000
Main body length
“A”
2.10
[53.3]
2.93
[74.4]
3.80
[96.5]
5.49
[139.4]
7.75
[196.9]
11.12
[282.4]
16.32
[414.5]
20.15
[511.8]
35.38
[898.7]
Core length
“B”
0.75
[19.1]
1.25
[31.8]
2.00
[50.8]
3.00
[76.2]
3.80
[96.5]
5.30
[134.6]
6.20
[157.5]
6.20
[157.5]
12.00
[304.8]
Core center at null
“P”
0.50
[12.7]
0.93
[23.6]
1.35
[34.3]
2.20
[55.9]
3.18
[80.8]
5.3
[134.6]
7.55
[191.8]
9.53
[242.1]
16.58
[421.1]
Body weight oz
[gram]
2.19
[62]
2.44
[69]
2.58
[73]
2.93
[83]
4.24
[120]
5.47
[155]
9.39
[266]
11.47
[325]
15.71
[445]
Core weight oz
[gram]
0.07
[2]
0.11
[3]
0.18
[5]
0.28
[8]
0.35
[10]
0.46
[13]
0.49
[14]
0.60
[17]
0.85
[24]
Dimensions are in inch [mm]
MECHANICAL SPECIFICATIONS – CAPTIVE CORE OPTION
Parameter DC-EC 050 DC-EC 125 DC-EC 250
DC-EC 500 DC-EC 1000 DC-EC 2000 DC-EC 3000
Main body length
“A”
2.48
[63.0]
3.31
[84.1]
4.18
[84.1]
5.87
[149.1]
8.13
[206.5]
11.50
[292.1]
16.70
[424.2]
Core rod position at null
“R”
3.78
[96.0]
4.36
[110.7]
4.85
[123.2]
6.04
[153.4]
7.90
[200.7]
10.52
[267.2]
15.27
[387.9]
Center of core position at null
“P”
0.84
[21.3]
1.27
[32.3]
1.69
[42.9]
2.54
[64.5]
3.52
[89.4]
5.22
[132.6]
7.89
[200.4]
Weight oz
[gram]
2.97
[84]
3.32
[94]
3.53
[100]
4.02
[114]
5.61
[159]
7.2
[204]
11.68
[331]
Dimensions are in inch [mm]
DC-EC Series – General purpose DC LVDT
DC-EC Series Rev. 7 www.meas-spec.com 2015-July
4/4
ORDERING INFORMATION
Description
Model
Part Number
Description
Model
Part Number
±0.050 inch LVDT
DC-EC 050
02560981-000
±2 inch LVDT
DC-EC 2000
02560986-000
±0.125 inch LVDT
DC-EC 125
02560982-000
±3 inch LVDT
DC-EC 3000
02560987-000
±0.25 inch LVDT
DC-EC 250
02560983-000
±5 inch LVDT
DC-EC 5000
02560988-000
±0.5 inch LVDT
DC-EC 500
02560984-000
±10 inch LVDT
DC-EC 10000
02560989-000
±1 inch LVDT
DC-EC 1000
02560985-000
OPTIONS
Metric threaded core (M3 x 0.5-6H)
ALL DC-EC
XXXXXXXX-006
Guided core
ALL DC-EC
XXXXXXXX-010
Small-diameter/low-mass cor e (consult factory for mass & dimensions)
ALL DC-EC
XXXXXXXX-020
Captive core
DC-EC 050 thru 3000 only
XXXXXXXX-200
Note: Add multiple option dash numbers together to determine proper ordering suffix
Example: DC-EC 1000, ±1 inch, with metr ic threa ded and gu ided core, P/N 02560985-016
ACCESSORIES
Dual rail DC power supply (±15VDC)
Model PSD 40-15
02291339-000
Core connecting rod, 6 inches long, 4-40 threads
05282946-006
Core connecting rod, 12 inches long, 4-40 threads
05282946-012
Core connecting rod, 24 inches long, 4-40 threads
05282946-024
Core connecting rod, 36 inches long, 4-40 threads
05282946-036
Core connecting rod, 6 inches long, M3x0.5 metric threads
05282977-006
Core connecting rod, 12 inches long, M3x0.5 metric threads
05282977-012
Mounting block
04560950-000
Refer to our “ Acces sorie s for LVD Ts” data shee t for our LVD T signal conditioning instr um entat ion and other ac ce ssor ies .
TECHNICAL CONTACT INFORMATION
NORTH AMERICA
EUROPE
ASIA
Measurement Specialties, Inc.
1000 Lucas Way
Hampton, VA 23666
United States
Phone: +1-800-745-8008
Fax: +1-757-766-4297
Email: sales@meas-spec.com
Web: www.meas-spec.com
MEAS Deutschland GmbH
Hauert 13
D-44227 Dortmund
Germany
Phone: +49-(0)231-9740-0
Fax: +49-(0)231-9740-20
Email: info.de@meas-spec.com
Web: www.meas-spec.com
Measurement Specialties China Ltd.
No. 26, Langshan Road
High-tech Park (North)
Nanshan District, Shenzhen 518057
China
Phone: +86-755-33305088
Fax: +86-755-33305099
Email: info.cn@meas-spec.com
Web: www.meas-spec.com
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for
inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the
manufacturer. Meas urem ent Specialt ies, I nc. reserves the right to make c hanges without further not ic e to any product herein. Measurement
Specialti es, Inc. makes no warran ty, represent ation or guarantee re garding the suit ability of its product f or any partic ular purpos e, nor does
Measurement Specialties, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims
any and all liability, including without limitation consequential or incidental damages. Typical parameters can and do vary in different
applications. All operating parameters must be validated for each customer application by customer’s technical experts. Measurement
Specialti es, Inc. does not convey any lic ense under its patent rights nor the rights of oth ers.
