DYTRAN 3145A, 3145AG DATA SHEET

5-44 CONNECTOR
TYP

SENSE AND DIRECTION OF INPUT
ACCELERATION FOR POSITIVE­GOING OUTPUT VOLTAGE SIGNAL,
TYP BOTH MODELS

MODEL 3145A

STUD MOUNT

THD 5-40, UNC-2A

9/32 (Ø.281) HEX, TYP,
Ø.315 ACROSS HEX
CORNERS, TYP

.59

.100

MOUNTING PORT PREPARATION:

DRILL #38 (Ø.1015) X.200 MIN DEPTH
TAP 5-40 X .140 MIN DEPTH THD

MODEL 3145AG

ADHESIVE MOUNT

(+)

Ø.24 TYP

.49 (TYP)

ADHESIVE MOUNTING
SURFACE

5. SUGGESTED ADHESIVE TYPE FOR MODEL
3145AG-CYANOACRYLATE "INSTANT BOND".

4. TO INSTALL MOD 3145A, TORQUE IN PLACE WITH
10 OZ.-INCHES.

3. WEIGHT-MOD 3145A-2.3 GRAMS.,

MOD 3145AG-2.1 GRAMS.

A

A

2. SEAL-HERMETIC, ALL WELDED.

1. MATERIAL: TITANIUM ALLOY.

EXCEPT AS OTHERWISE NOTED

ALL DIMENSI0NS IN INCHES
TOLERANCE: .XXX = ± .XX= ±

SURFACE FINISH
EXCEPT AS NOTED

BREAK EDGES TO DEBURR
RADIUS OR CHAMFER

THESE DIAS TO T.I.R.

FILLETS - MAX RAD.

.01

INSTRUMENTS, INC.

SCALE

DATE

DRAWN

APPROVED

TITLE

4X

3/28/00

N.C.

OUTLINE/INSTALLATION DRAWING

CHECKED

R.A.

REV

PART NO.

MAT'L

NEXT ASSEMBLY USED ON

DATE

A

MODELS 3145A & 3145AG

2-10-03 -

ECN

CHATSWORTH, CA.

DWG NO.

127-3145A

SHEET

OF

OF

1

SPECIFICATIONS

MODEL 3145A LIVM ACCELEROMETER

SPECIFICATION

PHYSICAL

WEIGHT 2.3 Grams
SIZE, HEX x HEIGHT (Height does not include mtg. stud) .281 (9/32) x .49 Inches
MOUNTING PROVISION 5-40 integral stud
CONNECTOR, TOP MOUNTED 5-44 Coaxial
MATERIAL, HOUSING AND CONNECTOR 300 Series Stainless Steel
ELELEMT STYLE Quartz planar shear

PERFORMANCE

SENSITIVITY, ± 10% [1] 100 mV/G
RANGE F.S. FOR ± 5 VOLTS OUTPUT ± 50 G's
FREQUENCY RANGE, ± 5% 0.5 to 10k Hz
RESONANT FREQUENCY, NOM. 45 kHz
EQUIVALENT ELECTRICAL NOISE FLOOR .007 G's RMS
LINEARITY [2] ± 1% % F.S.
TRANSVERSE SENSITIVITY, MAX. 5 %
STRAIN SENSITIVITY .002 G’s/µσ @ 250 µσ

ENVIRONMENTAL

MAXIMUM VIBRATION/SHOCK 600/3000 ± G's/G's PEAK
TEMPERATURE RANGE -60 to +300
SEAL, HERMETIC Glass-to-metal and TIG welded
COEFFICIENT OF THERMAL SENSITIVITY .04 %/oF

VALUE

UNITS

o

F

ELECTRICAL

SUPPLY CURRENT/COMPLIANCE VOLTAGE RANGE [3] 2 to 20/+18 to +30 mA/Volts
OUTPUT IMPEDANCE, TYP. 100 Ohms
BIAS VOLTAGE, +9 VOLTS NOM. +8 to +10 VDC
DISCHARGE TIME CONSTANT, NOM. 0.5 Sec
OUTPUT SIGNAL POLARITY FOR ACCELERATION TOWARD TOP Positive
CASE GROUNDING Case is grounded to electrical power ground

[1] Measured at 100 Hz, 1 G RMS per ISA RP 37.2.
[2] Measured using zero-based best straight line method, % of F.S. or any lesser range.
[3] Do not apply power to this device without current limiting, 20 mA MAX. To do so will destroy the integral IC
amplifier.

2