YOKOGAWA 701957 Manuel utilisateur

User’s

Manual Model 701957 Bridge Head

(DSUB-120 Ω, Shunt CAL,

Enhanced Shield)

Model 701958 Bridge Head

(DSUB-350 Ω, Shunt CAL,

Enhanced Shield)

IM 701957-01E

2nd Edition

IM 701957-01E

Foreword

Thank you for purchasing the bridge head (701957/701958).

This User’s Manual contains useful information about the function, procedures in

connecting the gauge, and handling precautions of the bridge head. To ensure correct

use, please read this manual thoroughly before operation.

Keep the manual in a safe place for quick reference in the event a question arises.

Notes

•The contents of this manual are subject to change without prior notice as a result of

continuing improvements to the device’s performance and functions.

•Every effort has been made in the preparation of this manual to ensure the accuracy

of its contents. However, should you have any questions or find any errors, please

contact your nearest YOKOGAWA dealer as listed on the back cover of this manual.

•Copying or reproducing all or any part of the contents of this manual without

YOKOGAWA’s permission is strictly prohibited.

Revisions

•1st Edition: February, 2003

•2nd Edition: October, 2017

Disk No. DL40

2nd Edition: October 2017 (YMI)

2IM 701957-01E

Checking the Contents of the Package

Unpack the box and check the contents before using the device. If the contents are not

correct or missing or if there is physical damage, contact the dealer from which you

purchased them.

Bridge Head

Check that the model name given on the name plate match that on the order. When

contacting the dealer from which you purchased the device , please quote the device

No.

Made in Japan

Model

Model Specifications Description

701957 Bridge resistance 120 ΩShunt CAL, enchanced shield

701958 Bridge resistance 350 ΩShunt CAL, enchanced shield

No. (Device number)

When contacting the dealer from which you purchased the device, please quote this

number.

Standard Accessories

D-Sub cable

(for 701957, 701958)

B8023WP

Length: 5 m

Attaching Plate

B9947KR

2 Binding screws

(M4 × 5 mm)

This User’ Manual

IM 701957-01E

Conventions Used in this Manual and on the Device

Symbols Used on the Device

GND terminal

The operator must refer to an explanation in the User’s Manual.

Symbols Used in this Manual

Note

Provides important information for the proper operation of the device.

4IM 701957-01E

Contents

Foreword ........................................................................................................................................ 1

Checking the Contents of the Package .......................................................................................... 2

Conventions Used in this Manual and on the Device ..................................................................... 3

1Construction of the Device .................................................................................................. 5

2Shunt Calibration ................................................................................................................ 7

3Connecting the Strain Gauge .............................................................................................. 8

4Fixing the Device in Place ................................................................................................. 10

5Connecting to the Strain Instrument ................................................................................. 11

6Calibrating Using a Shunt Resistor ................................................................................... 12

7 Specifications .................................................................................................................... 16

IM 701957-01E

1Construction of the Device

The bridge head is a converter for inputting the amount of change of the resistance of

the strain gauge to the amplifier. Six types of connection methods (single-gauge, single-

gauge three-wire, adjacent-side two-gauge, opposed-side two-gauge, opposed-side two-

gauge three-wire, and four-gauge) are supported by setting the switch.

Names of the Parts

Cable

B8023WP

Connector

Switch

Strain gauge

connection terminal

GND terminal

Connect to a measuring instrument.

Shunt resistant

connection terminal

Terminals and Circuit Diagram

345

8 3 2 5 6

Bridge+

Bridge-

Input+

Input-

Input- Sense+

Sense+

Sense-

Sense- Suntcal+

Suntcal+

Suntcal-

Floating Common

Suntcal-

Shell

BRIDGE HEAD(120 )

GAUGE SELECT

SHUNT RESISTANCE

OFF

12345

123456

789 78978 9

STRAIN GAUGE

SHUNT CALSHUNT CAL

4GAUGE2GAUGE

1GAUGE

1GAUGE 2GAUGE 4GAUGE

(SHUNT CAL, ENHANCED SHIELD)

Strain gauge

connection

terminal

Switch

D-Sub connector

GND terminal

(Terminal

number)

(Switch number)

Pin Signal name

symbol Floating common

Sense– (Sensing of the bridge voltage-)

Shuntcal–(Shunt signal–)

Shuntcal+(Shunt signal +)

Sense+ (Sensing of the bridge voltage+)

Bridge– (Bridge voltage –)

Input– (Measurement signal –)

Input+ (Measurement signal +)

Bridge+ (Bridge voltage +)

Pin assignments of the connector (Bridge head side)

Shunt resistant

connection

terminal

The numbers inside are the terminal

numbers.

The numbers inside are the switch

numbers.

The numbers inside are the pin

numbers of the connector.

6IM 701957-01E

Wiring for Accessory Cable B8023WP

A wiring diagram for the accessory cable is given below. The connector shell connects

to the shielding.

Shell

Twist

Shield

Twist

Shell

Bridge+

Bridge-

Input+

Input-

Sense+

Sense-

Shuntcal+

Shuntcal-

Floating Common

Bridge+

B8023WP

Bridge-

Input+

Input-

Sense+

Sense-

Shuntcal+

Shuntcal-

Floating Common

Note

Check the shape and pin assignment of the connector before connecting it to the accessory

cable.

Circuit Diagram for Bridge Head and Measuring Instrument

The circuit diagram below shows the bridge head connected to a measuring instrument

(the DL750). Isolate the strain gauge before use.

CAUTION

Do not connect the strain gauge terminal to any items with electric potential.

B8023WP

Bridge+

Bridge-

Input+

Input-

Sense+

Sense-

Shuntcal+

Shunt resistor

Shuntcal-

Shuntcal+

Shuntcal-

Shell

Twist

Shield

Twist

Shell

Bridge+

Bridge-

Input+

Input-

Sense+

Sense-

Suntcal+

Suntcal-

Floating Common

Floating

Common

Floating

Common

ON/OFF

Shuntcal-

Sense+

Sense-

Sense+

Sense-

701271

STRAIN_DSUB

Bridge

Power

Shuntcal

Shuntcal+

The connector shell

is connected to the

case potential of the

bridge head.

Bridge Head 701957/701958

(with shunt calibration support)

GND

terminal

Measurement instrument

(example: DL750)

All module

signals are

isolated.

Module

Case

The connector shell is connected

to the case potential of the

measurement instrument.

*1 The GND (floating common) of the module is connected to the case potential inside the bridge head.

*2 The bridge head case, the cable shield, and the measurement instrument case are connected as measures against noise.

The shield is connected

to the bridge head case

and the measurement

instrument case.

The floating common of the

module is grounded within

the bridge head.

1 Construction of the Device

IM 701957-01E

2Shunt Calibration

This instrument supports shunt calibration. When executing shunt calibration, perform

balancing without applying a load to the strain gauge, then turn on shunt resistance. The

values from the shunt resistance are stored on the measuring instrument.

P2:X

P2:Y

Balance Shunt calibration

Strain Strain

Before execution

After execution

Strain input Strain input

The zero point is corrected

when balancing is executed.

Current measured

value*

Gain is corrected.

The strain value corresponding to

the shunt resistor is set to P2:Y of

the setup menu.

* Automatically obtained when shunt calibration is executed.

Shunt calibration is used to correct the gain of strain measurements by inserting a known

resistance (shunt calibration resistance (shunt resistance)) in parallel with the strain

gauge. With this instrument, the gain can be corrected on both the positive and negative

sides. Make sure to notice whether the corresponding strain values are positive or

negative.

When correcting the gain on the negative side (normal)

Shunt resistor insertion terminal: between 8 to 9

Set negative to the corresponding strain value.

789Bridge+

Bridge-

In+

120 Ω

In-

Shunt calibration relay

circuit (Built into the

strain module. Turns

ON/OFF automatically

when shunt calibration

is executed.)

Shunt resistor

(Applied to the bridge head)

Bridge

voltage

Shunt resistor

Strain

gauge

Shunt resistant

connection terminal

When correcting the gain on the positive side

Shunt resistor insertion terminal: between 7 to 8

Set positive to the corresponding strain value.

Bridge+

Bridge-

In+

In-

789

120 Ω

Shunt calibration relay

circuit (Built into the

strain module. Turns

ON/OFF automatically

when shunt calibration

is executed.)

Shunt resistor

(Applied to the bridge head)

Bridge

voltage

Shunt resistor

Strain

gauge

Shunt resistant

connection terminal

For specific instructions on performing shunt calibration, refer to your measuring

instrument’s user’s manual. For information on shunt resistance and the corresponding

strain values, see page 13 in “Calculation of the Shunt Resistance.”

8IM 701957-01E

3Connecting the Strain Gauge

The bridge head can support six types of connection methods: single-gauge, single-

gauge three-wire, adjacent-side two-gauge, opposed-side two-gauge, opposed-side two-

gauge three-wire, and four-gauge.

Do not connect the strain gauge terminal to any items with electric potential.

CAUTION

Do not connect the strain gauge terminal to any items with electric potential.

Use the lead wires included with the strain gauge or wires meeting the following

specifications to connect the strain gauge and the bridge head.

•Usable wire: single wire φ 0.14 to 1.5 mm2, or stranded wire 0.14 to 1.5 mm2 (AWG26

to 16)

• Normal length of bare wire : 6 mm

Note

•Isolate the strain gauge before use.

•Make the wires between the strain gauge and bridge head as short as possible.

•Proper measurements may not be possible in an environment where electromagnetic

interference exists.

•If you are shielding the strain gauge, connect the shield wire to the floating common

terminal of the bridge head.

• For the handling of the strain gauge, see the instruction manual that came with the shield

gauge.

Single-gauge Method

OFF

12345

Bridge+ (Sense+)

Input- (Shuntcal-)

Bridge- (Sense-)

Input+

Bridge+

Sense+

Bridge-

Sense-

Input+

Input-

Shuntcal-

Shuntcal

ON/OFF

Shuntcal+

Bridge head terminal

Strain gauge

Shunt

resistor

Switch setting of

the bridge head

Single-gauge Three-wire Method

OFF

12345

Bridge+ (Sense+)

Input- (Shuntcal-)

Bridge- (Sense-)

Input+

Bridge+

Sense+

Bridge-

Sense-

Input+

Input-

Shuntcal-

Shuntcal+

Shuntcal

ON/OFF

Bridge head terminal

Strain gauge

Shunt

resistor

Switch setting of

the bridge head

IM 701957-01E

Adjacent-Side Two-gauge Method

OFF

12345

Bridge+ (Sense+)

Input- (Shuntcal-)

Bridge- (Sense-)

Input+

Bridge+

Sense+

Bridge-

Sense-

Input-

Input+

Bridge head terminal

Strain gauge

Switch setting of

the bridge head

Opposed-Side Two-gauge Method

OFF

12345

Bridge+ (Sense+)

Input- (Shuntcal-)

Bridge- (Sense-)

Input+

Bridge+

Sense+

Bridge-

Sense-

Input-

Input+

Bridge head terminal

Strain gauge

Switch setting of

the bridge head

Opposed-Side Two-gauge Three-wire Method

OFF

12345

Bridge+ (Sense+)

Input- (Shuntcal-)

Bridge- (Sense-)

Input+

Bridge+

Sense+

Bridge-

Sense-

Input-

Input+

Bridge head terminal

Strain gauge

Switch setting of

the bridge head

Four-gauge Method

OFF

12345

Bridge+ (Sense+)

Input- (Shuntcal-)

Bridge- (Sense-)

Input+

Bridge+

Sense+

Bridge-

Sense-

Input-

Input+

Bridge head terminal

Strain gauge Strain gauge

Strain gauge

Switch setting of

the bridge head

3 Connecting the Strain Gauge

Ce manuel convient aux modèles suivants

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