London electronics Maxi-int2-l mk.2 User manual

1

Document Ref:pm65\manuals\INTUITIVE_L_MkII Revision:14 Dated: 30 June 2009

Software version F00.14

Panel mounting load / weight indicator / controller

MAXI-INT2-L Mk.2

Connection details, scaling and general information

The New version of the INTUITIVE Family, with these extra benefits...

* 20 bit A/D convertor, higher precision, improved stability.

* 16 bit D/A convertor, greater resolution.

* Direct and theoretical linearisation features

* More comms options, for faster, more flexible data access.

* Extra ‘Factor and Offset’ feature, allows you to correct for Gravity, Container Tare etc.

* Simpler Alarm-Setpoint setting.

* More alarm setting modes, including in-band and out of band alarms.

* Summary Screen, lets you know which options are fitted, whenever you want to know.

* Wider operating temperature range

* Variable brightness feature

* Adjustable menu timeout delay, to suit new and experienced users.

* Online streaming step-by-step video guides at http://london-electronics.com

Ordering code: MAXI-INT2-L-X-X-X-X-X

MAXI- INT2 = Maxi-Int Mark 2 family

L= Loadcell model

Analogue output: 0=none, ANI=4-20mA, ANV=0-10V

Alarm outputs: 0=none, AL2= 2 relays, AL4=4 relays

Serial data: 0= none, 232=RS232, 485=RS485

Display colour: R=Red, G=Green

Power: AC=100-240V AC, DC=11-30V DC

!

Caution: There is a risk of electrical

shock if this instrument is not properly installed

Caution: Risk of danger: Read the whole

manual before you install this meter

London Electronics Limited

Thorncote Green, Near Hatch, Sandy, Bedfordshire SG19 1PU

Tel +44(0)1767 626444 Fax +44(0)1767 626446

www.london-electronics.com [email protected]

2

.

3

Alarm board configuration 27

Alarm programming 28-33

Analogue output 25-26

Application notes 43

Bootup routine 10

Brightness Adjustment 11

Button Functions 12-14

Calibration - introduction 16

Calibration method - direct, no linearisation 17

Calibration method - direct, with linearisation 22

Calibration method - theoretical, no linearisation 18-20

Calibration method - theoretical, with linearisation 21

Connections 9

Declaration of conformity 44

Filtering 15

General Description 6

Introduction 5

Keyboard timeout Delay 10

Language 10

Logic inputs 36-37

Mounting and Installation 7

Notes 38

Option boards- installing 24

Record of revisions 41

Reverse / Mirror / Heads-Up display 39

Serial output option 34-35

Specifications 40

Warnings 4

WEEE 42

Wiring Advice 8

Zero drift compensation 23

Contents

4

Safety First ..............Don't assume anything............. Always double check.

If in doubt, ask someone who is QUALIFIED to assist you in the subject.

Warnings

Please carefully read this manual and all warnings. Install the meter

ONLYwhen you are sure that you’ve covered all aspects.

Where the product is intended for “UL” installations, removal or

addition of option boards is not permitted.

Check that the model number and supply voltage suit your application

before you install the meter.

Connect the meter according to current IEE regulations, IEC61010 &

NFPA:70 National Electric Code in USA.

This meter is for Installation class II service only. This means it

has exposed electrical and power terminals. You must install it in

a suitable fire enclosure which will also protect users from electric shock

We designed this meter for Pollution-Degree 2 environments only.

Power supplies to this equipment must have anti-surge (T) fuses rated

at 400mA for 230V supply, 400mA for 110V supply or 2A for DC

supplies in the range 11-30VDC. Only Siba fuses in series 189500,

cULus listed according to file #E167295 are accepted for this service

under the terms of UL listing .Aswitch or circuit breaker, clearly marked

as a disconnecting device, must be included close to the installation.

Don’t touch any circuitry after you have connected the meter, because

there may be lethal voltages on the circuit board.

Only adjust on-board switches or connections with the power turned off

Make sure all screw terminals are tight before you switch the meter on.

Only clean the meter’s front with a soft damp cloth. Only lightly dampen

with water. Do not use any other solvents. The behind-panel case may

be cleaned with a dry cloth only, use no liquid or solvent on it.

!

5

Introduction

Please contact us if you need help, if you have a complaint, or if you have

suggestions to help us improve our products or services.

If you contact us about a product you already have, please tell us the full

model number and serial number, so that we can give you accurate and fast

help.

This product has a 2 year warranty. We will put right or replace any meter

which is faulty because of bad workmanship or materials. This warranty does

not cover damage caused by misuse or accident.

IMPORTANT

If this equipment is important to your process, you may want to buy a spare to

cover possible failure or accidental damage in the future.

This is because during factory shutdown periods, you may have to to wait

several weeks for an equivalent replacement, or we may have no stock at the

time you urgently need it.

You may also need to pay extra carriage charges if you want a fast, guaranteed

courier service. Warranty repairs or replacements are usually returned with a

standard courier service.

We do not offer compensation for losses caused by failure of this instrument.

If you do not agree with these conditions, please return this item in unused,

condition, in its original packaging and we will refund the purchase price,

excluding any carriage paid.

We thought you’d prefer to know about possible delays and extra charges

now, rather than during a panic. Aspare unit could help to avoid these issues.

We always try to improve our products and services, so these may change

over time. You should keep this manual safely, because future manuals, for

new designs, may not describe this product accurately.

We believe these instructions are accurate, and that we have competently

designed and manufactured the product, but please let us know if you find any

errors.

6

General Description

The MAXI-INT2 Series of meters accept industrial sensors to allow various

physical measurements to be made, such a weight, temperature, pressure,

humidity etc. Different models are available for different sensor types.

The main function of the INT2 series is to give a numeric readout of the variable

being monitored. Most models include an excitation power output, to power

the sensor directly.

Various optional output modules are also available to give alarm relay outputs,

analogue output or digital communications, or any combination of these options.

Meters are programmed using front panel pushbuttons. The buttons may be

locked with a rear switch.

Meters have two power supply options : 100-240 VAC or 11-30VDC

The MAXI-INT2 series of meters are designed to mount into a protective

enclosure which will protect users from contact with power and signal wiring.

These units must be installed fully assembled, and must be installed according

to local electrical installation rules. When properly installed, they provide ingress

protection to IP65 / NMA4X from the front

Safety

Obey all safety warnings in this manual, and install the meter according to local

wiring and installation regulations. Failure to follow these guidelines may cause

damage to the meter, connected equipment, or may be harmful to personnel.

Any moving mechanical device controlled by this equipment must have suitable

access guards to prevent injury to personnel if the meter should fail.

!

Caution: There is a risk of electrical

shock if this instrument is not properly installed

Caution: Risk of danger: Read the whole

manual before you install this meter

7

Mounting and Installation - Class II

Install these meters in a suitable protective electrical control enclosure

according to local wiring regulations. See specifications for maximum allowable

temperature in enclosure. Allow adequate air circulation.

888888

138mm +1mm -0mm

67.5mm +1mm -0mm

Panel cutout

123456789012345678901234567890121234567890123456789012345678901212345678901234567890123

Model: INT2X-X-X-X

Installing into front of panel

Remove the two screw clamp

assemblies and safely store them

for later fitting.

Front surface

of enclosure

Front surface

of enclosure

Front surface

of meter

Left side of meter case

Slide the meter, with gasket

into the panel cutout

Securing into the panel

Re-fit the screw clamp assemblies and

tighten the screws to firmly clamp the meter

in place.

Ventilation

There should be sufficient ventilation in the

enclosure to ensure that the meter’s case is

always kept to less than 60C.

Meter Spacing.

Meters should be spaced apart sufficiently

to allow a free flow of ventilation air around

the meters, such that no part of the case will

exceed 60C

Side view of meter installed in panel

Connectors

8

Wiring Advice

This meter uses detachable screw terminal connectors. Refer to the wiring

diagram on the following page for the correct positioning of each wire.

The conductors you use must be suitable for the meter’s temperature, current

and voltage rating, which is broadly described as follows:-

Cable Temperature Rating

All cables must be rated for operation up to 90C continuous.

Cable gauge and screw tightness

The connectors on this instrument can accept conductors up to 16 gauge

AWG / 1.5mm2c.s.a. The minimum cross sectional area shall be 22 gauge

AWG / 0.5mm2 . Tighten screw terminals to 7.0 lb/in torque / 0.8 Nm torque.

Cable insulation voltage rating

Cables shall have an insulation voltage rating of at least 380V continuous.

Wire preparation:

We recommend multi-strand wire, because it withstands vibration better than

single strand cable. Pull the wire firmly after you make the connection to confirm

it is tight.

Use screened cable for all signal and control wiring and connect the screen to

earth at the destination end only. Route signal cabling away from power cabling

and relay switching cabling, to avoid electrical noise interference.

No bare wires exposed

Terminal screwdiver - 3mm blade

Strip back

5mm max.

London

Electronics

Outside

enclosure

Inside

enclosure

Side view of meter

Detachable

connectors

150mm behind panel

9

Connections - INT-L

Alarm Lock

Calib’n Lock

Analog

o/p option

Serial Data

o/p option

0, 2 or 4 Alarm Relay

o/p options

Common

Tare

Peak/Valley

Reset

Logic Inputs PowerSignal I/P & Excitation

Excitation -

Sense-

Sig-

Sig+

Sense+

Excitation +

- +AL1 AL2 AL3 AL4

6 wire connection

for long cable runs

and zener barrier

installations.

4 wire connection

for short cable runs

Cable and/or zener

barrier resistance

NL

- +

B

A

Comm

Enable

TxD

RxD

Comm

Enable

RS232

RS485

Rated 2A 250VAC Resistive

Using Zener Barriers?

See application notes near

end of manual for details on

how to use Zener Barriers

with these meters.

Remote

contacts

(5V DC 1mA)

!

Warning:

Disconnect all power before

exposing the rear of the meter

Millivolt input only?

If you only want to measure a

mV signal, without full bridge,

link Exc+ to Sense+ and link

Exc- to Sense -

!

Connectors and options

Connectors may be present

even if output options are not

installed. Refer to rating label

to see installed options.

!

Class II Installation

Not used

Cable and/or zener

barrier resistance must

not cause the excitation

voltage to drop below

4V.

Fuse Switch

Circuit breaker

Power

Customer-supplied disconnection

and overload protection devices

10

Startup meter Settings

Menu Language Choice

Press the two right hand buttons briefly. You will see the User Interface language, which you

can change with the UP or DOWN buttons. Accept with OK

Next you will see ...

Meter Bootup routine

1. Activates all digit segments

2. Runs up and down brightness

settings

3. Displays model number and

installed options

4. Displays firmware version

5.Displays calibration audit

number.

6. Goes to meter mode

When you switch the meter on, it can run through a summary list of software version number,

installed options, calibration number etc.

You can choose from the 3 lists of bootup information to be displayed, the less information

you display, the sooner the meter will be available to operate.

Next you will see ...

Tare Memory

You can configure the meter to store any tared values on power down (Tare S), typical in

weighing applications, or you can clear the tare memory on power down (Tare N).

Next you will see ...

Lockout notes: Cal Lock switch = OFF when changing. Switch Cal Lock to ON after changing

UI EnG UI FRA

boot 0 boot 1 boot 2

1. Activates all digit segments

2. Runs up and down brightness

settings

3. Displays model number and

installed options

4. Goes to meter mode

1. Goes immediately to meter

mode

tare s tare n

11

Brightness Adjustment

In normal operation, you can select from one of 8 brightness levels, to suit your local lighting

conditions, or to match the brightness of several meters which may be from different batches

or ages.

Press for 3 seconds, then press the down or up button to decrease or increase the

brightness.

Press OK when set.

Your chosen brightness level will be saved in memory, so that the meter will return to the

chosen brightness after power-off.

Lockout notes: Cal Lock switch = ON when changing.

Drift cancellation (Not on INT2-C, INT2-S)

If your meter will normally be showing 0, for example a platform scale, you can set the meter

to continually cancel any long term drift. To do this, set Drift 1.

This only operates at and around zero reading.

The meter will compares readings to previous ones every 30 seconds, and if the value has

changed by a small amount, the meter will aoutomatically re-zero. The maximum movement in

a 30 second period is 8 counts of the least-significant digit. Any more than that, we assume

the change has been a valid process movement, so leave the change unaltered.

drift 1

bright

12

Button Functions- ‘Quick-Step’ - Page 1

Functions Buttons Conditions

Cal.src

AL CFG

888888

Calibration lockout OFF

Can be viewed at any time.

Alarm lockout OFF to

change

Calibration lockout OFF

Calibration Type

Press both buttons >3 secs

Change with UP/DOWN button. OK=Accept

Alarm Settings

Press button briefly to view

>3 seconds to change setpoint

>5 seconds to change function

Analogue Output Settings

Press > 3 seconds to enter

Calibration Zero Setting

Press > 3 seconds to enter

Calibration Span Setting

Press > 3 seconds to enter

bright Calibration lockout ON

Brightness

Press button for 3 seconds

Change with UP/DOWN button. OK=Accept

offset Calibration lockout OFF

Calibration Offset

Press both buttons >3 secs, press OK 3x

Change with UP/DOWN button. OK=Accept

factor Calibration lockout OFF

Calibration Factor

Press both buttons >3 secs, press OK 2x

Change with UP/DOWN button. OK=Accept

888888 Calibration lockout OFF

Decimal Point position

Press button 3 seconds, set during Cal Span

Change with UP/DOWN button. OK=Accept

13

ui eng

int..L

lSt 1

Calibration lockout OFF

Can be viewed at any time

Calibration lockout OFF

Button Functions- ‘Quick-Step’ - Page 2

Functions Buttons Conditions

888888 Calibration lockout ON

Link terminals 7,10 and 8

Language& Boot-up mode

Press both buttons briefly

Change with UP/DOWN button. OK=Accept

Hardware & Software summary

Press both buttons >3 secs

Last digit round-up

Press both buttons >3 secs, press OK once

Change with UP/DOWN button. OK=Accept

Reset Peak & Valley memories

Press buttons briefly

dlay.10 Calibration lockout OFF

Menu timeout delay

Press both buttons briefly, press OK 3x

Change with UP/DOWN button. OK=Accept

lin. on Calibration lockout OFF

Linearisation

Press both buttons briefly, press

Change with UP/DOWN button. OK=Accept

Fil 0.5 Calibration lockout OFF

Filter time constant

Press both buttons >3 secs

Change with UP/DOWN button. OK=Accept

drift..0 Calibration lockout OFF

Drift Compensation

Press both buttons briefly, press OK 2x

Change with UP/DOWN button. OK=Accept

Fil.J.10 Calibration lockout OFF

Filter Jump percentage

Press both buttons >3 secs, press OK 1x

Change with UP/DOWN button. OK=Accept

14

Button Functions- ‘Quick-Step’ - Page 3

Functions Buttons Conditions

888888 Calibration lockout ON

Link terminals 7, 10 and 8

Reset Tare

Press buttons briefly 888888

888888 Calibration lockout OFF

888888

Calibration lockout ON and

Link terminals 7 and 8

Calibration lockout ON

Link terminals 7 and 9

Serial Comms setup

Press both buttons briefly

Tare display to 0

Press button briefly. Display shows 0 and the

button LED will illuminate to show you are tared.

Valley & Peak (Max. & Min.)

Press button briefly, once for peak, next for

valley.

tare S Calibration lockout OFF

Tare Storage

Press both buttons briefly, press OK once

Change with UP/DOWN button. OK=Accept

rEv.d 1 Calibration lockout OFF

Reverse / Mirror display

Press both buttons briefly, press OK 5x

Change with UP/DOWN button. OK=Accept

15

Filter settings

You can use the filter to improve display stability. This is useful if your signal is unstable. Bigger

time constants give more stability but slower response.

The Time constant of this digital filter is very similar to the time constant of an RC filter where

T=RC . The time constant is the time it takes for the display to reach 63 % of its final reading

value, after a step change on the input.

You will see that if you select a 1 second filter time, it will take several seconds for the meter to

reach its final value.

To give improved response to large step changes, we can momentarily cancel the filter action

with the ‘Filter Jump’ feature

How does the Filter Jump feature work?

First, make a note of the range you calibrated your meter over (not the full dynamic range of the

meter, just the the difference between the maximum and minimum display values you set, in

either direct or theoretical calibration) Let’s assume you calibrated the meter for a 250 range.

If you set the filter jump percentage to 25%, any sudden change in input of less than 25% of 250

will be included in the averaging calculation.

However, a jump of greater than 25% will cause the filter to be ignored and the meter will

immediately jump to that new value.

If you set a jump of 0%, filtering will always be overridden (never any filtering)

If you set a jump of 99%, filtering will always be present, so long as the input signal doesn’t jump

more than 99% of the calibrated range.

Fil 0.5 Calibration lockout OFF

Filter time constant

Press both buttons >3 secs

Change with UP/DOWN button. OK=Accept

Fil.J.10 Calibration lockout OFF

Filter Jump percentage

Press both buttons >3 secs, press OK 1x

Change with UP/DOWN button. OK=Accept

16

Calibration Methods - introduction

Calibration lockout switch must be OFF to view

and/or change calibration.

Press Set1 and Set2 buttons at the same time...

There are two ways you can calibrate your display, and each way can be done with 2 points

only, or up to 10 linearisation points.

A. Direct connection of real-time low and high input signal levels, which you

scale the display against. (Zero and Span)

B. Theoretical scaling, where you use the keyboard to enter expected zero and

full scale sensor signals, and the measurement amounts these relate to .

After a couple of seconds,

display shows...

Press UP or DOWN arrow to change Press UP or DOWN arrow to change

Press OK to choose. Press OK to choose.

Examples of Theoretical Calibration...

1. If you do not yet have your sensor, but know what

its published calibration settings are.

For example, you plan to use a pressure sensor,

which will give 4-20mA for 0-250 Bar. You can

enter the input range of 4-20mA and the

measurement range of 0-250.

2. If you are a distributor, supplying a transmitter to

an end user who will be buying his sensor from

another source. He has told you on his order what

he would like the scaling to be.

Shortly after CAL.SrC appears, the

display will change to show either dIrECt

or tHEor as below.

When you have chosen the Calibration type, it will be saved in your display’s memory, so you

will not need to repeat the procedure.

You may now calibrate your display using your preferred method, on the following pages.

..

Examples of Direct Calibration...

1. If you want to calibrate a weighing system by

loading it with known calibration weights.

2. If you want to calibrate a straight-sided tank

gauging system by filling the tank with a known

amount of liquid.

3. If you are performing a calibration check against

a calibration reference, such as humidity cells, pH

buffers etc.

Press

button

to toggle

888888

direct theor

17

Direct Calibration, no linearisation

Set your calibration method to DIRECT - see previous page.

Assume we want to calibrate a weighing platform, rated at 250kg. We have a 200kg calibration

weight. (Use at least 60% rated load for calibration. 100% ideally)

First, calibrate the full scale (SPAN) reading. We do SPAN first, because in the SPAN procedure we

can set the decimal point position of our measurement, to set resolution.

SPAN Calibration . Apply your calibration load and press the Set2 button for 3 seconds.

Display will show ‘direct’ , ‘set HI’ . Press OK. You will see that one digit is brighter than the others.

You can edit the value of a brightened digit with the UP/DOWN buttons.

You can brighten other digits with the DIGIT button.

Go through each digit in turn, to set the desired value of your calibration load.

Press OK when done.

To set the decimal point position, press the Set2 button for 3 seconds whilst in the numeric

setting stage . You’ll see all decimal points light, with one brighter than the rest. Use UP or DOWN

buttons to move the brightest decimal point and press OK when in the desired position.

ZERO Calibration. Remove your load and press the Set1 button for 3 seconds.

Display will show ‘direct’ , ‘set LO’ . Press OK. You will see that one digit is brighter than the others.

You can edit the value of a brightened digit with the UP/DOWN buttons.

You can brighten other digits with the DIGIT button.

Go through each digit in turn, to set all digits to 0. Press OK when done.

200 kg

Enter your calibration weight value.

Press OK

when done.

Example only

200.0

0000.0

Lockout notes: Cal Lock switch = OFF when changing. Switch Cal Lock to ON after changing

18

Theoretical Cal., no linearisation - page 1

Set your calibration method to THEORETICAL - see previous pages

As an example, let us assume we want to calibrate the display for a loadcell input.

Let us also assume that we know from the calibration sheet which came with the loadcell, that it

has a sensitivity of 0 to 2.2451mV/V and a rated capacity of 0 to 5000kg

The Display generates 10 V of excitation for the loadcell. So we can simply mutiply the mV/V

figure by 10 to get our full scale mV value.

Most loadcells are balanced to give 0mV at 0 load.

This means that for a load range of 0 to 5000 kg we expect a signal range of 0 to 22.451mV

We need to enter these figures into the transmitter...

Start with the full scale SPAN setting...

Press the Set2 button for around 3 seconds.

The display will briefly show theor, to confirm that we

are in the theoretical setup mode.

Choose with the up or down arrows and press OK.

Set to highest input signal level which was

22.451mV, according to the sensor

calibration sheet in our example.

You can change the value of the brightest

digit with the UP or DOWN buttons.

Brighten other digits with the DIGIT button.

Press OK when done...

In HI will appear briefly, followed by a numeric

value, which you can set...

The numeric value will need to be the High

input signal level ...

theor

in hi 22.451

Lockout notes: Cal Lock switch = OFF when changing. Switch Cal Lock to ON after changing

19

rd HI will appear briefly, followed by a

numeric value, which you can set...

The numeric value will need to be the High

display reading value ...

Set to highest reading value, which was

5000 according to the sensor calibration

sheet in our example.

You can change the value of the brightest

digit with the UP or DOWN buttons.

Brighten other digits with the DIGIT button.

Press OK when done...

You can change the position of the decimal point,

relating to rd HI (and rd LO)

This may be useful if you want to increase the

resolution of the display.

The resolution affects several of the display’s

important functions, such as ....

...the resolution of the analogue output signal

...the resolution of your alarm relay action.

...the resolution of the serial data output value.

As an example, assume you have a sensor with 10

tonne capacity.

If you scale the display for 0 to 10, the resolution will

only be 1 part in 10

Your analogue output will change in 10% steps.

Your precision of alarm setting would be to within 1

tonne.

The resolution of serial data would be within 1 tonne.

However, if you include a decimal point you could

control the resolution, as in these examples :-

0-10.0 which gives 1% resolution

0-10.00 which gives 0.1% resolution

0-10.000 which gives 0.01% resolution

You cannot get more resolution than 1 part in 60000.

This is the limit of resolution in the A/D converter.

Note: If you change the decimal point position, you

must reset the rdLO and rdHI values also.

Next .... how to set the theoretical ZERO calibration...

Theoretical cal., no linearisation - page 2

To change decimal point poition, press the Set2

button for around 3 seconds while you’re in the rdHI

setup...

Use the UP arrow button to move the decimal point to

your desired position.

Press OK when done.

....Continued from previous page

rd hi 5000

0.5.0.0.0.

5000

20

Theoretical cal., no linearisation - page 3

Press the Set1 button for around 3 seconds.

theor will appear briefly, to confirm that you

are in the theoretical calibration mode.

The numeric value will need to be the low

input signal value ...

Next, In Lo will appear briefly. Set to the

low input value, which was 0mV according

to the sensor calibration sheet in our

example.

You can change the value of the brightest

digit with the UP or DOWN buttons.

Brighten other digits with the DIGIT button.

Press OK when done...

rd LO will now appear briefly, followed by a

numeric value, which you can set...

The numeric value will need to be the low

reading value ...

Set to the low reading value, which was

0kg according to the sensor calibration

sheet in our example.

You can change the value of the brightest

digit with the UP or DOWN buttons.

Brighten other digits with the DIGIT button.

Press OK when done...

This completes the Theoretical calibration routine. Please remember to switch the Calibration

Lockout switch ON

Continued from previous pages. ZERO setting ...

theor 000000

rd lo000000

London Electronics MAXI-INT2-L Mk.2 User manual

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