SENSY 5510 Series User manual

MA-5510_EN.doc Page 1 on 14 Rev: 27-03-19

5510 CELL SERIES

INSTALLATION MANUAL

1. GENERAL INFORMATION .................................................................................................................................................................2

1.1. Placement at level.......................................................................................................................................................................2

1.2. Shocks.........................................................................................................................................................................................2

1.3. Electrical weldings.......................................................................................................................................................................2

1.4. Lightning......................................................................................................................................................................................3

1.5. Protection hood ...........................................................................................................................................................................3

1.6. Exterior mechanical influences....................................................................................................................................................3

2. ADJUSTEMENT THRUST...................................................................................................................................................................4

2.1. Setting of anti-reverse .................................................................................................................................................................4

2.2. Setting of overload protection......................................................................................................................................................4

3. CABLING.............................................................................................................................................................................................5

3.1. Cable ...........................................................................................................................................................................................5

3.2. Wiring ..........................................................................................................................................................................................5

3.3. Parallel wiring ..............................................................................................................................................................................5

3.4. Calibration ...................................................................................................................................................................................6

3.5. Measurement errors....................................................................................................................................................................6

3.6. Insulation test ..............................................................................................................................................................................6

3.7. Output impedance .......................................................................................................................................................................7

3.8. Input impedance..........................................................................................................................................................................7

4. USE IN POTENTIALLY EXPLOSIVE ATMOSPHERE (OPTION).......................................................................................................8

4.1. Intrinsic safety protection.............................................................................................................................................................8

5. Periodic inspections.............................................................................................................................................................................8

6. Use features ........................................................................................................................................................................................9

7. Guarantee............................................................................................................................................................................................9

8. DRAWINGS AND WIRING DIAGRAMS..............................................................................................................................................9

9. EU Declaration of Conformity ............................................................................................................................................................14

MA-5510_EN.doc Page 2 on 14 Rev: 27-03-19

1. GENERAL INFORMATION

1.1. Placement at level

Differences of a few tenths can usually be tolerated

with the 5510 bending cell series.

Nevertheless, when the differences are greater and

when the mounting is higher than three feet, it is

important, for correct use, to install shim packs that

ensure equal force distribution between them.

The references of these shim packs are:

e.g. G5510-0.6-XX

G5510-1 -XX

G5510-2 -XX

where 0.6/1/2 mm = thickness

XX =load

e.g. for a 0.5-2 t EASY-MOUNT

REF: G5510-0.6-0.5 t

1.2. Shocks

If shocks are to be expected, it is preferable to install a

shock absorber between the load and the cell. The former

is made from a stack of rubber and metal plates.

1.3. Electrical weldings

When arc welding must be done on the structure, it

is advised to install stranded ground wire in order

that the derived current does not pass through the

cell, damaging it.

It is also advised to disconnect the cells of the

measurement instrument.

Rev.

Date

Reason

27/03/2019

Adding point 4, 5, 6, 7, 8 and 9 (EU Declaration of Conformity)

MA-5510_EN.doc Page 3 on 14 Rev: 27-03-19

1.4. Lightning

If there is a risk of lightning, it is advised to isolate the

cell the best possible and derive the former by

stranded wire. In order to do that; place a rubber sheet

under the sole and polyamide waterproof washers

under the fixing screws.

REF: Washers VI-NMG-500-12 for M12

VI-NMG-500-16 for M16

Rubber SM-I5510-CA500 (0.5 - 2 t)

SM-I5510-CA5T (3 - 5 t)

SM-I5510-CA10T (7.5 - 10 t)

1.5. Protection hood

The load cells with strain

gauges are sensitive to

differential changes in

temperature.

Measurement errors may occur if the temperature changes fast. In which case, it can be useful to install a

protecting screen to avoid solar radiation or abrupt thermal convection (strong wind). The hood has another

function: to protect against shocks, projections (mud, water, etc.) and to avoid dirt at the level of the cell.

Screws that join the cell to the structure ensure the fixation. It is important that this hood does not hinder the

movement during the loading. If necessary, isolate the sides of the hood.

1.6. Exterior mechanical influences

In order to avoid measurement errors, the load

to be weighed should not be subject to parasitic

contributions: connecting pipes cables and stops

or draw-bolts. If there are any, they must be

installed with the greatest flexibility.

Also ladders, bridges for access should be

suitably articulated, etc (clamping).

Caoutchouc

Stranded ground wire

MA-5510_EN.doc Page 4 on 14 Rev: 27-03-19

2. ADJUSTEMENT THRUST

2.1. Setting of anti-reverse

This setting is done when the cell is UNLOADED.

Using wrenches, lock the central nuts A&B to the

middle of the threaded rod.

To turn the stop screw upwards, move nut A.

To go down, move nut B.

The setting is done when the base plate is in contact

with the head of the screw.

When the two threaded rods are adjusted, lock the D

nuts.

2.2. Setting of overload protection

This setting is done when the cell is COMPLETELY

loaded.

Unlock the central nuts A + B. Move the upper bolts E

upwards until it is against base plate F.

The setting is done when the base plate is in contact

with the seat of the nuts.

When the two nuts are adjusted, lock the G nuts.

MA-5510_EN.doc Page 5 on 14 Rev: 27-03-19

3. CABLING

3.1. Cable

The cells are delivered with a 4-wire screened cable. The screen (shielded wire) cannot in any case be in

contact with the ground, e.g.; in metallic junction boxes, it is necessary to isolate the screen with a sheath

(thermal).

The screen can only be connected to standardized earth.

It is advised to install a thermo-retractable sheath

(retracted 4x) at the end of the cable inside a

waterproof paste in order to avoid any leak. If there is

any possible danger of damage along its wiring, it is

necessary to use an additional cable protection,

passing the cable through a pipe (steel, preferably).

3.2. Wiring

The cell wiring should be far away from power lines

(motors, transformers), and placed in separate pipes.

Soldered connections have to be applied in the

junction box, (preferably screwed connections). It is

advised to place a bag of SILICA GEL to keep dry

inside the junction box. SENSY could provide PVC

junction box with a PG9 packing-gland, which could

receive 4 or 6 parallel cells.

REF: Junction box

JBOX-4R (4 inputs - 1 output)

JBOX-6R (6 inputs - 1 output)

3.3. Parallel wiring

The cells must be installed in parallel, with the stranded mass wire joined to itself. The sense must be joined to

the cell supply, before the points of parallel wiring and the stabilising resistances.

COLOR CODE

1) Excitation- (Yellow)

2) Excitation+ (Brown)

3) Signal+ (Green)

4) Signal- (White)

5) Screen

A) Cable PVC

B) Thermo-retractable sheath

A) Display (ex. dv680)

B) Junction box

C) Cell

R) Adjusting resistance

1) – out measure (green)

2) – in supply (yellow)

3) + in supply (brown)

4) + out measure (green)

5) Ref. (sense) + (pink)

6) Ref. (sense) + (grey)

MA-5510_EN.doc Page 6 on 14 Rev: 27-03-19

3.4. Calibration

It must be done after the sensor has been turned on for

a while (10-15 minutes) to obtain a uniform

temperature of the installation. The cells do not usually

need to be adjusted with each other. However, when

greater precision is needed, it is sometimes necessary

to stabilise the cells individually with the resistances in

the junction box. Those resistances are of several

ohms (±10) and are installed in the supply circuit.

A parallel adjustable resistance is mounted with a fixed

resistance. The most sensitive cell will have its input

resistance increased and the least sensitive will have

its lowest input resistance. You will see that it is

preferable to work on both supply cables: schematic

mounting is given for your information and allows a

variation of 0 to 20 ohms in series on the input

impedance (2x10 Ω).

Note: A well known weight of more than 20% of the

nominal load of the system can be expected. The

calibration error is always much higher than the error

made on the evaluation of the load.

3.5. Measurement errors

When the calibration is difficult and measurement errors are observed, it is necessary

to check the installation. Mechanically, the cells must be free in the direction of the

load and well positioned. Electrically, the connections must be securing, the junction

boxes exempt from humidity and the cables intact.

If there is no fault to be seen, it is necessary to verify the internal circuit. SENSY can help to diagnose on the

basis of the associated diagnosis sheet provided in the appendix and filled in beforehand.

3.6. Insulation test

The measuring of the insulating resistance is done with

a multimeter. The standardized testing voltage is 10 V.

It is applied to a conductor. It can be determined by

disconnecting the measuring instrument and applying

voltage between one of the conductors and the metallic

mounting structure, or individually, cell by cell to situate

the leakage with precision. The insulation must not, in

any case, be lower than 2 GΩfor a 10 V voltage. This

insulation default will generate measurement errors if

the insulation resistance is lower than several hundred

MΩ. Insulation default can also be generated by

environmental conditions (temperature, humidity).

MA-5510_EN.doc Page 7 on 14 Rev: 27-03-19

3.7. Output impedance

The Wheatstone bridge is made up of 350 Ωgauges.

At the output signal (OUT+: green, OUT-: white), the

resistance is 350 Ω ± 3 Ω.

This impedance must be in accordance with the

individual cell data sheet, which can easily be

determined with a multimeter. If a wider varying

resistance is read, it means that there is a break-off or

a short circuit current; a resistance variation of several

ohms would instead be a consequence of a severe

overvoltage problem.

3.8. Input impedance

Input signal (IN+: brown, IN-: yellow): its resistance is

usually of 350 Ω ± 3 Ω. Its impedance must be in

accordance with the individual cell data sheet. If a

different resistance is read, it means that there is a

break-off or a short circuit current. It is at the input that

one finds drift compensation, slope and sensitivity

adjusted resistance.

Rm Sensitivity drift compensation

Rms Sensitivity drift adjustement

Rs Sensitivity calibration

Rzb Zéro calibration

Rzc Zéro drift compensation

MA-5510_EN.doc Page 8 on 14 Rev: 27-03-19

4. USE IN POTENTIALLY EXPLOSIVE ATMOSPHERE (OPTION)

4.1. Intrinsic safety protection

Use of sensors in hazardous zones can only be done with Ex marked sensors,

delivered with one or more of the certificates hereunder:

ATEX: ISSeP07ATEX012X

SENSY’s load cells which are marked Ex i comply with the following standards:

ATEX

EN 60079-0: 2012

EN 60079-26: 2007

EN 60079-11: 2012

The use of junction boxes or additional cable lengths must be considered in the choice of protection. The

electrical characteristics of the cable being limited (see certification), it is recommended to carefully chose the

cable length and avoid any winding of the cable. After having defined all elements, it is mandatory to control if

the sensor’s output tension is still compatible with the electronic device in use and the requested accuracy.

See certificate for the special conditions for safe use.

5. PERIODIC INSPECTIONS

1. Check output for zero load (annually)

Output signal

Min acceptable

Max acceptable

mV/V / 4 wires

-0.15 mV/V

0.15 mV/V

4-20mA / 2 wires

3 mA

6 mA

4-20mA / 3 wires

3 mA

6 mA

0- 5V / 3 wires

0 V

0.8 V

0- 10V / 3 wires

0 V

0.8 V

1-5V / 3 wires

0.5 V

1.5 V

1 -10V / 3 wires

0.5 V

1.5 V

-10 / 0 / + 10V

-1.5 V

1.5 V

2. Make sure that the axle beam has not been knocked (markings) or chemically attacked (some corrosive

greases). If points 1 and 2 are not accounted for, just take preventive measures. (annually)

3. In case of doubt, reply to the diagnostic questionnaire available on Web: www.sensy.com/support.

4. Verify the integrity of the cable.

5. After any serious functioning incident, repeat operations 1 to 4.

MA-5510_EN.doc Page 9 on 14 Rev: 27-03-19

6. USE FEATURES

(The exact characteristics are systematically given in the control sheet delivered with every load cell and

function of the output signal!)

Output signal:

mV/V

4-20 mA

1-5 V

0-10 V

-10…0…+10 V

RS-232

RS-485

2 wires

3 wires

Compensated temp. range

-10…+45°C

Operating temperature range

-30… +70°C1

Storage temperature range

-50…+85°C

Power supply

(VDC)

5…10…152

9 – 303

13 – 30

15 - 184

6…12…18

Load impedance e

(Ω)

≤750

≤ 1.000

> 5k

Nominal sig. range

0 – 1…2 mV/V

4 - 20 mA

0.1-5 V

0.1-10 V

-10…0…+10 V

Saturation

> 3 mV/V

> 24 mA

> 11 V

1Max +60°C for EX-I T4, T6 and C6 options

25 to 12VDC for EX-I T2 GD, EX-I T4 GD and EX-I T6

GD options

39-28VDC for EX-I C6 options

415 to 27VDC with a 1000 Ωbridge

7. GUARANTEE

The manufacturer’s guarantee is applicable as far as mounting recommendations and general use principle,

like above described, are respected.

For any particular use, not described in this document, it is mandatory to obtain a prior written agreement from

SENSY S.A. for the validity of the guarantee.

8. DRAWINGS AND WIRING DIAGRAMS

Ref. Item Capacities Weight (kg)

5510-A 0.5 - 2 t 0.95

Rev. 17/04/2018

Accessories

Other capacities and dimensions available on request

Load direction

Wiring

Dimensions in mm

STANDARD DIMENSIONS5510 >

TECHNICAL DRAWINGS: SHEAR BEAM LOAD CELL

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