Series 2400 pages

Series 240

General Purpose DC LVDTs
The Series 240 DC-DC LVDTs are an integrated package
consisting of a precision linear variable differential
transformer, a solid state oscillator, and a phase-sensitive
demodulator. The transducer is designed for excellent
linearity, infinite resolution, and high sensitivity. Input and
output circuits are electrically isolated from each other
and from the coil assembly housing, making them usable
directly in floating or ground return systems. DC indicators,
recorders, and control systems can usually be driven
directly by the large DC output. The core, when displaced
axially within the coil assembly, produces a voltage change
in the output directly proportional to the displacement.

KEY FEATURES
Ranges from ±0.05” to ±4.0”

Stainless Steel Construction

Non-linearity < 0.5%

6 to 30 VDC Excitation

SPECIFICATIONS - ELECTRICAL
0240-0000

0241-0000

0242-0000

0243-0000

0244-0000

0245-0000

0246-0000

0245-00005

WORKING RANGE, ± Inches (mm)

0.050 (1.27)

0.100 (2.54)

0.250 (6.35)

0.500 (12.7)

1.00 (25.4)

2.00 (50.8)

3.00 (76.2)

3.00 (76.2)

MAX. USABLE RANGE, ± Inches (mm)

0.075 (1.78)

0.150 (3.75)

0.375 (9.53)

0.750 (19.1)

1.50 (38.1)

2.75 (69.8)

3.25 (82.5)

4.00 (101)

INPUT, VDC

6.0 Min. to 30 Max.

MODEL

9.0 Min. to
30 Max.

NOMINAL F.S. OUTPUT, ±VDC with unloaded output
@ 6 VOLT INPUT

1.3

2.4

1.8

3.1

4.6

3.9

3.3

N/A

@ 15 VOLT INPUT

3.4

6.4

4.8

8.3

12.1

10.2

8.7

10

@ 24 VOLT INPUT

5.5

10.4

7.8

13.5

18.7

16.5

14.1

16.3

@ 30 VOLT INPUT

7.0

13.0

9.7

17.0

24.8

20.7

17.7

30.5

INPUT CURRENT

8.3 mA @ 6 Volt input to 52 mA @ 30 Volt input

2 NON-LINEARITY

±0.5% Full Scale Over Total Working Range
±1.0% Full Scale Over Maximum Usable Range

INTERNAL CARRIER FREQUENCY, Hz

13000

12000

3600

3400

3200

1500

1400

1400

% RIPPLE, RMS (nominal)

0.7

0.7

0.8

0.8

0.8

1

1

1

OUTPUT IMPEDANCE, Ohms

2500

3500

5200

5500

5600

5500

5600

5600

FREQ. RESPONSE (3 dB down), Hz

300

140

115

110

100

110

75

75

TEMPERATURE RANGE

-65°F to +250°F (-54°C to +121°C)

RESOLUTION

Infinite

Tel: 800-828-3964 | Fax: 860-872-4211 | Web: www.transtekinc.com