DayTronic 3000 series, 3170 Instruction Manual

MODEL

3170

STRAIN GAGE CONDITIONER

SB.5.1

INSTRUCTION MANUAL

3000

Instrument Series

Copyright © 1996, Daytronic Corporation. All rights reserved.

No part of this document may be reprinted, reproduced, or used in any form or by
any electronic, mechanical, or other means, including photocopying and recording,
or in any information storage and retrieval system, without permission in writing
from Daytronic Corporation. All specifications are subject to change without notice.

Correction

1

A

2

B

3
4

C

9

A

D

B

C

+EXC

–EXC

+SENSE

–SENSE

+SIG

–SIG

CAL SENSE

.
.
.

A

Extra Wire, paired
with CAL SENSE,
unconnected at
Connector A

SHIELD

Bendix PT02E-10-6S
Burndy BT06AC-10-6S

1

A

2

B

3
4

C

9

D

A

B

C

+EXC

–EXC

+SENSE

–SENSE

+SIG

–SIG

CAL SENSE

.
.
.

A

Extra Wire, paired
with CAL SENSE,
unconnected at
Connector A

SHIELD

Amphenol 97-3106A­14S-6S, AN3057-6

to Model 3170 Instruction Manual, v. SB.5.1

The I/O Wiring Data in Fig. 4 of this manual does not give the correct shield pairing of
cable wires, which is shown in the revised diagrams below and on the following page:

Daytronic 400 Series

Transducer Connections

Daytronic 500 Series

Transducer Connections

(cont’d)

Correction

+SENSE

–EXC

–SENSE

+SIG –SIG

CAL
SENSE

1

A

2

B

3

C

4
9

.
.
.

A

SHIELD

+EXC

+SENSE

–EXC

–SENSE

+SIG –SIG

CAL
SENSE

1
A
2
B
3
C
4
9

.
.
.

A

SHIELD

Extra Wire, paired with CAL SENSE,
unconnected at Connector A

+EXC

+SENSE

–EXC

+SIG –SIG

CAL
SENSE

1

A

2

B

3

C

4
9

.
.
.

A

SHIELD

Extra Wire, paired with CAL SENSE,
unconnected at Connector A

–SENSE

+EXC

to Model 3170 Instruction Manual, v. SB.5.1 (cont’d)

Daytronic 3X70 Instrument to Generalized Strain Gage Transducer

4-Wire Configuration for Cables
Shorter Than 20 Feet

6-Wire Configuration for Cables
Shorter Than 20 Feet

8-Wire Configuration for Cables
Longer Than 20 Feet

Model 3170 Instruction Manual, v. SB.5.1

Pub. No. 3170M.5.1, Issued 03/01

MODEL

3170

STRAIN GAGE CONDITIONER

INSTRUCTION MANUAL

Part No. 91132

Daytronic Corporation

Dayton, OH • Tel [phone]

www.daytronic.com

Daytronic Corporation

TABLE OF CONTENTS

Section

Page

1

Description

.................................................

1

2

Installation and Cabling ...................................... 3

3

Calibration .................................................. 8

4

Block Diagram Description

................................... 12

5

Verification of Normal Operation .............................. 14

LIST OF ILLUSTRATIONS

Figure

Page

1

Model 3170 Strain Gage Conditioner ...........................

1

2

Instrument Mounting Dimensions .............................

4

3

Instrument Panel Mounting .................................. 5

4

I/O Wiring Data

............................................

.

9

5

Front-Panel Description ...................................... 11

6

Block Diagram .............................................. 15

7

Star-Bridge Construction ..................................... 17

LIST OF TABLES

Table

Page

PLEASE NOTE:

Sections 6 and 7, Figures 8 and 9, and Table 2 have been

removed from this manual.
If you need information regarding specific 3170 components and circuitry,

please contact the Daytronic Service Department at [phone].

1 Specifications ............................................... 2

Daytronic Corporation

INSTRUCTION MANUAL

MODEL 3170 STRAIN GAGE CONDITIONER

1. DESCRIPTION

The Model 3170 conditioner-amplifier module for use with resistance strain
gage transducers. It supplies a regulated dc excitation voltage to the transducer
bridge, provides the necessary balancing and calibration controls, and amplifies the
resulting signal to a standard Five-Volt Data Signal Level which is the output analog
signal level of 3000 Series Modules. The

3170

has three separate analog outputs,

each having a different bandpass: (1) dc to

2

kHz,

(2) dc to 200 Hz, and (3) dc to 2

Hz. Active low-pass filters are used to achieve the 200 Hz and 2 Hz cutoff

frequen-

cies.

The filtered outputs provide for averaging or smoothing signals containing

noise or other unwanted dynamic components which are periodic in nature. Filter-

ing removes these dynamic components so that stable digital indication and precise,

jitter-free control action can be obtained. The Model 3170 is shown in Figure 1 and

the specifications are given in Table 1.

Figure 1. Model 3170 Strain Gage Conditioner

1

Model 3170

Table 1. Specifications

Transducers: 4-arm bridges, 90

to

2000 ohms, nominally 1 to 8

mv/v, full

scale (120 ohms or less requires use of 5-volt excitation).

Cables:

4-, 5-,

or 7-wire, depending on application; 1000

feet

maximum length.

Bridge Excitation: Regulated 5 volts or 10 volts dc, selected

with

I/O

connector wiring. Transducers

with

sensitivity from 4 to 8

mv/v

full

scale must use

5-volt

excitation.

Balance Adjustments:

10-turn

coarse and fine; will balance 1.5

mv/v

initial unbalance.

Span Adjustments:

10-turn

coarse and fine; 1 to 8

mv/v,

full scale.

Analog Outputs: Three analog outputs available; 0 to ±5 volts with

50% overange, 5 milliamperes maximum.

Bandpass

is dc to 2 kHz, dc

to 200 Hz, or dc to 2 Hz, depending on

output

used. Active low-pass

filters provide for rolloff of 60

dB

per decade above cutoff frequency.

Full-scale slew

time

is 1 .4/f seconds, where f is

the

cutoff frequency.

Common Mode Rejection: Greater

than

80

dB.

Output Ripple and Noise: 0.15% of full scale (rms) maximum for

2-kHz and 100-Hz outputs; 0.02% of full scale (rms) on 2-Hz output.

Accuracy: 0.05% of full scale.

Dimensions: 1.7 x 4.41 x 8.5 (HWD inches).

Operating Temperature Range: 0 to + 130 degrees F.

Power Requirements: 105 to 135 volts ac, 50 to 400 Hz at 5 watts

maximum.

2