BEKA Advisor A90-SS Manuel utilisateur

Issue: 2

13th April 2017

Advisor A90-SS

Rugged universal process

panel meter with

multicolour display

Issue 2

1. Description

2. Operation

2.1 Controls

3. Applications

3.1 Power supply

3.1.1 Mains powered version

3.1.2 DC powered version

3.2 Signal inputs

3.2.1 Current input

3.2.2 Voltage input

3.2.3 Resistance thermometer input

4. Installation

4.1 Location

4.2 A90-SS earthing

4.3 EMC

4.4 Installation procedure

4.5 Scale card

5. Configuration and Calibration

5.1 Summary of configuration

functions.

5.2 Input type: input

5.3 Meter function: func

5.4 Units of temperature: deg

5.5 Display resolution: re5n

5.6 Decimal point: dp

5.7 Calibration of digital display using

external source: cal

5.8 Calibration of digital display using

internal reference: 5et

5.9 Trim temperature display: tri

5.10 Bargraph format and calibration: bar

5.11 Function of ( push button: u--p

5.12 Tare function: tare

5.13 Maximum andminimum hold

function: hold

5.14 Select meter display colour: color

5.15 Security code: code

5.16 Reset to factory defaults: r5et

5.17 Under and overrange

6. Maintenance

6.1 Fault finding during commissioning

6.2 Fault finding after commissioning

6.3 Servicing

6.4 Routine maintenance

6.5 Guarantee

6.6 Customer comments

7. Accessories

7.1 Scale card

7.2 Tag information

7.3 Alarms

7.3.1 Alarm relay contacts

7.3.2 Configuration and adjustment

7.3.3 Alarm enable: enbl

7.3.4 Setpoint adjustment: 5p1

7.3.5 Alarm function: hi.lo

7.3.6 Alarm relay energised or

de-energised in alarm

condition: nd.ne

7.3.7 Hysteresis: h5tr

7.3.8 Alarm delay: dela

7.3.9 Alarm silence time: 5il

7.3.10 Flash display when alarm

occurs: fla5h

7.3.11 Latch alarm output: latch

7.3.12 Display colour in alarm

condition: color

7.3.13 Access setpoint in display

mode: ac5p

7.3.14 Adjusting alarm setpoint from

the display mode

7.3.15 Display setpoints on the

bargraph.

7.4 4/20mA output and transmitter supply

7.4.1 4/20mA loop design

7.4.2 System design for powering a

transmitter.

7.4.3 Configuration and calibration

7.4.4 4/20mA enable: enbl

7.4.5 Display which corresponds to

4mA output: 4.000

7.4.6 Display which corresponds to

20mA output: 20.000

7.4.7 RTD fault detection: fault

22222222222

The A90-SS process panel meter is CE marked to show compliance with the European EMC

Directive 2014/30/EU and the Low Voltage Directive 2014/35/EU.

CONTENTS

1. DESCRIPTION

The Advisor A90-SS Rugged Universal Panel

Meter is a multicolour five digit instrument,

primarily intended for displaying a current, voltage

or resistance analogue process signal in

engineering units. The instrument can also display

temperature directly from a resistance

thermometer. The A90-SS is configurable on-site

using the four front panel push buttons and an

intuitive menu that can be protected by a security

code to prevent accidental adjustment.

Housed in a rugged stainless steel case with a

toughened glass window providing IP66 front of

panel ingress protection, the A90-SS is ideal for

installion in environments where it is liable to be

impacted.

The A90-SS Process Panel Meter employs a novel

technique that enables the display to be in any

colour on a black background, readable in all

conditions from total darkness to bright sunlight.

The display intensity is fully adjustable to match

other instruments and preserve operator's night

time vision.

When fitted with optional alarms the display colour

can be linked to the alarm status. For example, a

green display could indicate normal operation, the

display colour changing to red when a high alarm

occurs and to blue when a low alarm occurs.

The instrument input type and range are selectable

on-site and the meter display can be calibrated to

show the engineering variable represented by the

analogue input. The engineering units of

measurement such as kg, gallons/hour or ºC, can

be printed on the slide-in scalecard.

One of the following input ranges may be selected:

Voltage input

0 to 100mV

0 to 1V

0 to 10V

Current input

4 to 20mA

0 to 50mA

Resistance thermometer input

2 or 3 wire connected PT100 resistance

thermometer, or differential output from two

PT100 resistance thermometers.

-200 to 850ºC

There are two versions of the A90-SS Process

Panel Meter, one powered by a low voltage dc

supply and the other by a mains ac supply. The

instrument power supply type is shown on the label

adjacent to the power supply terminals 7 and 8.

dc powered model 10 to 36V

ac powered model 90 to 264V 47 - 63Hz

2. OPERATION

Fig 1 shows a simplified block diagram of the

A90-SS Process Panel Meter. Field wiring

terminals are the same for the low voltage dc

powered version and for the mains ac powered

version.

Terminals for the optional factory fitted alarms and

4/20mA output plus 24V transmitter supply are only

fitted when the option is included.

Each time power is applied to the meter

initialisation is performed during which all

segments of the display are activated, after a few

seconds the instrument enters the display mode

using the calibration information stored in the

instrument memory.

Fig 1 A90-SS panel meter block diagram

2.1 Controls

The Advisor A90-SS panel meter is controlled and

calibrated via the four front panel push buttons

located below the display. In the display mode i.e.

when the meter is displaying a process variable,

these push buttons have the following functions:

(While this button is pushed the meter

will display the input as a percentage of

the instrument span or, depending

upon configuration, the analogue input

in milliamps, volts or ohms.

When optional alarms are fitted and the

latch function latch is enabled,

pressing this button will de-latch the

alarm output.

When the alarm silence time 5il is set

to any value other than zero, operating

this button clears the alarm for the

configured silence time.

&While this button is pushed the meter

will display the numerical value and

analogue bargraph the meter has been

calibrated to display with a minimum

input I.e. 4mA or 0V. When released

the normal display in engineering units

will return.

If the hold function hold is enabled,

operating this button will cause the

meter to display the lowest value since

the hold function was last reset by

operating the &and * buttons

simultaneously.

*While this button is pushed the meter

will display the numerical value and

analogue bargraph the meter has been

calibrated to display with a maximum

input I.e. 20mA or 1V. When released

the normal display in engineering units

will return.

If the hold function hold is enabled,

operating this button will cause the

meter to display the highest value since

the hold function was last reset by

operating the &and * buttons

simultaneously.

)Unused unless tare function tare is

enabled. When tare function is

enabled operating this button for less

than 3 seconds toggles the meter

display between the gross and net

values. The ‘T’ annunciator is

activated when the net display is

shown. Operating the

)button for

more than 3 seconds tares the display

by setting it to zero.

) + &When both buttons are operated

simultaneously for more than 3

seconds slowly decreases display

brilliance.

) + *When both buttons are operated

simultaneously for more than 3

seconds slowly increases display

brilliance.

(+ &Shows firmware number followed by

version.

( + *Direct access to the alarm setpoints

when optional alarms are fitted to the

meter and the ac5p access setpoints

in display mode function has been

enabled.

& + *Resets the maximum and minimum

hold memories when the hold

function is enabled.

(+ )Access to configuration menu via

optional security code.

3. APPLICATIONS

3.1 Power supply

3.1.1 Mains powered version

The mains powered version of the A90-SS panel

mounting meter will operate from a wide range of

voltage and frequency ac supplies.

Voltage 90 to 264V rms ac

Frequency 47 to 63Hz

Power 2.5W

The supply should be well regulated and free from

transients.

3.1.2 DC powered version

The DC powered version of the A90-SS panel

mounting meter is designed to be operated from a

nominal 24V dc instrument power supply but, as

shown below, will function with a wide range

supply voltages.

Voltage 10 to 36V dc

Current 200mA at 10V

56mA at 36V

3.2 Signal inputs

The A90-SS panel meter can measure current and

voltage process signals and display them in

meaningful engineering units. The meter can also

display temperature in a variety of formats from a

Pt100 resistance thermometer primary element.

Selection of the input type is made within the

configuration menu which is described in section 5

of this manual. Input terminals also vary for

different inputs as shown in Fig 6.

3.2.1 Current input

The A90-SS panel meter can measure and display

in engineering units any process signal

represented by an analogue linear or square law

current such as a 4/20mA process signal. The

A90-SS has two current input ranges 4-20mA and

0-50mA dc.

The current input terminals 13 and 14 are

galvanically isolated from the A90-SS meter power

supply and all other outputs which allows the A90-

SS meter to measure the current in any process

loop without affecting the accuracy of the loop.

When connected in series with a current loop the

A90-SS panel meter introduces the following

voltage drops:

At 20mA 1.0V

At 50mA 1.5V

Fig 2 shows how the A90-SS panel meter should

be connected to measure a process current.

Fig 2 A90-SS Process panel meter measuring

current.

3.2.2 Voltage input

The A90-SS panel meter can measure and display

in engineering units any linear process signal

represented by an analogue voltage such as a 0 to

1V signal. The voltage input terminals 11, 12 and

13 are galvanically isolated from the A90-SS meter

power supply and all other outputs. There are

three dc voltage input ranges:

Input

Terminals resistance

0 to 0.1V 13 (0V) and 12 (+ve) 5MΩ

0 to 1.0V 13 (0V) and 12 (+ve) 5MΩ

0 to 10V 13 (0V) and 11 (+ve) 1MΩ

The input resistance of all the voltage inputs is high

allowing the A90-SS meter to measure any

process voltage signal without loading it and

changing the value. Fig 3 shows how the A90-SS

panel meter should be connected to measure a

process voltage.

Fig 3 A90-SS Process panel meter measuring

voltage.

3.2.3 Resistance thermometer input

The A90-SS panel meter can measure the

resistance of a single Pt100 BS EN 60751 platinum

resistance thermometer and display the

corresponding temperature in a variety of units

including ºC and ºF. The resistance thermometer

may be connected to the meter via two or three

wires. The differential output of two resistance

thermometers can also be measured and

displayed.

Fig 4 shows the connections for two and three wire

resistance thermometers and Fig 5 the

connections for differential measurements.

Fig 4 Connections for a 2 or 3 wire resistance

thermometer.

Fig 5 Connections for differential resistance

thermometer measurements.

4. INSTALLATION

4.1 Location

The A90-SS panel meter has a rugged stainless

steel case with a 10mm thick toughened glass

window. The case provides 7J and the window 4J

front of panel impact protection. The captive

silicone gasket, which seals the joint between the

instrument and the panel enclosure, ensures IP66

front of panel ingress protection. The instrument

has IP20 rear protection.

Although the front of the meter has IP66 protection,

it should be shielded from continuous direct

sunlight and severe weather conditions

The meter may be installed in any panel providing

that the operating temperature is between –40ºC

and +55ºC.

Fig 6 shows the overall dimensions of the

instrument together with the recommended panel

cut-out dimensions to achieve an IP66 seal

between the instrument enclosure and the

instrument panel.

4.2 A90-SS earthing

The A90-SS panel meter complies with the Low

Voltage Directive 2014/35/EU and has the

following isolation between circuits:

AC powered model supply input 3kV rms

DC powered model supply input 1.5kV

Alarm contacts 4kV rms

All other circuits 500V rms

The A90-SS stainless steel enclosure is totally

isolated from the meter circuits but for personnel

safety should be earthed. This can be achieved

via the earth terminal on the meter power supply

plug, or via the M4 earth stud on the rear panel of

the meter.

Fig 6 show the overall dimensions of the indicators

together with the recommended panel enclosure

cut-out dimensions.

Fig 6 A90-SS meter dimensions and terminals

Panel wiring should be supported to prevent

vibration causing damage to the wiring or

terminals.

4.3 EMC

The A90-SS panel meter complies with the

requirements of the European EMC Directive

2014/30/EU. For specified immunity all signal

wiring should be screened with the screens

earthed at one point. Voltage and current input

wiring should be in twisted pairs.

4.4 Installation Procedure

a. Cut the aperture specified in Fig 6 in the

panel enclosure. Ensure that the edges of

aperture are de-burred.

b. Inspect the meter's captive gasket and

ensure that it is not damaged before inserting

the meter into the panel enclosure aperture.

c. If the enclosure panel is less than 1.0mm

thick, or is non-metallic, an optional BEKA

stainless steel support plate should be slid

over the rear of the indicator before the panel

clamps are fitted to evenly distribute the

clamping force and prevent the enclosure

panel being distorted or creeping.

d. Slide a panel clamp into the two grooves at

each corner of the indicator housing with the

M3 stud protruding through the hole at the

rear of the clamp. Fit the stainless steel

spring washer over the stud and secure

with the stainless steel wing nut.

e. Evenly tighten the four clamps to secure the

instrument. The recommended minimum

tightening torque for each wing nut is 22cNm

(1.95 lbf in).

f. Connect the panel enclosure wiring to the

rear terminal blocks. The terminals may be

removed from the instrument by pulling.

Fig 7 Fitting panel mounting clamps

4.5 Scale card

The meter’s units of measurement may be shown

on a scale card visible through a window at the

right hand end of the display. The scale card is

mounted on a flexible strip that is inserted into a

slot at the rear of the instrument as shown in Fig 8.

Thus the scale card can easily be changed without

removing the meter from the panel or opening the

instrument enclosure.

New meters are supplied with a printed scale card

showing the requested units of measurement. If

this information is not supplied when the meter is

ordered a blank card will be fitted.

A pack of self-adhesive scale cards printed with

common units of measurement is available as an

accessory from BEKA associates. Custom printed

scale cards can also be supplied.

To change a scale card, unclip the protruding end

of the flexible strip by gently pushing it upwards

and pulling it out of the enclosure. Peel the

existing scale card from the flexible strip and

replace it with a new printed card, which should be

aligned as shown below. Do not fit a new scale

card on top of an existing card.

Install the new scale card by gently pushing the

flexible strip into the slot at the rear of the indicator,

when it reaches the internal end-stop secure it by

pushing the end of the flexible strip downwards so

that the tapered section is held by the rear panel.

Align the self-adhesive

printed scale card onto the

flexible strip and insert the

strip into the indicator as

shown below.

Fig 8 Inserting flexible strip carrying scale card

into slot at the rear of the A90-SS meter.

5. CONFIGURATION AND CALIBRATION

The A90-SS process panel meter is configured and

calibrated via the four front panel push buttons. All

the configuration functions are contained in an

easy to use intuitive menu that is shown

diagrammatically in Fig 9.

Each menu function is summarised in section 5.1

and includes a reference to more detailed

information. When the meter is fitted with alarms

additional functions are added to the menu which

are described in section 7.3. Similarly when a

4/20mA output is fitted, additional functions appear

in the configuration menu which are described in

section 7.4.

Throughout this manual push buttons are shown

as (,), &and *and legends displayed by

the meter are shown in a seven segment font

exactly as displayed e.g. CAL and ALr2.

Access to the configuration menu is obtained by

operating the (and )push buttons

simultaneously. If the meter security code is set to

the default 0000 the first parameter input will be

displayed. If a security code other than the default

code 0000 has already been entered, the meter will

display CodE. Pressing the (button will clear this

prompt allowing each digit of the code to be

entered using the *or &push button to adjust

the flashing digit and the (button to move control

to the next digit. When the correct four digit code

has been entered, pressing ) will cause the first

parameter input to be displayed. If the code is

incorrect, or a button is not pressed within twenty

seconds, the meter will automatically return to the

display mode.

Once within the configuration menu the required

parameter can be reached by scrolling through the

menu using the *or &push button as shown in

Fig 9. When returning to the display mode

following reconfiguration or recalibration, the meter

will display dAtA followed by 5AVE while the new

information is stored in permanent memory.

CAUTION

When making adjustments in the configuration

menu, if the interval between pressing any

button exceeds one minute, the A90-SS meter

will automatically return to its display mode

and any configuration changes will not be

saved.

All new meters are supplied configured and

calibrated as requested at the time of ordering. If

calibration is not requested, meters will be

configured as follows:

Input input 4-20

Function FunC 5td

Resolution rE5n 1

Decimal point dp 000.00

Display at 4mA 2ero 0.00

Display at 20mA 5PAn 100.00

Bargraph type left

Bargraph start BarLo 0.00

Bargraph finish BarHi 100.00

(button in display mode u--p PC

Tare tArE Off

Max and min hold hold off

Display colour color green p5et ..4

Access code CodE 0000

Default configuration can easily be changed

on-site.

Fig 9 Configuration menu

P E P E

Security Code

Enter code by

pressing

* or & and (

to move to next

digit. Code 0000

allows direct

access to

the menu

Function

to select

5td function

Root extractor

P E

Resolution

to select

resolution

of least

significant

digit

Decimal point

to select

position of

displayed

decimal point

P E

P E P E

Only appears when

voltage or current

inputs are selected

Only appears when

voltage or current

inputs are selected

Calibration using

external analogue source

(Preferred method)

With accurate

analogue input

set required zero display by

pressing or and

to move to the next digit

or decimal point.

Similarly, using accurate

analogue input set required

full scale display

* Required input must be

adjusted before the zero or

span function is operated.

Any analogue input within

the input range may be used

providing difference is > 25%

P E

P E P E

Calibration using

internal references

(Analogue input may be any value)

Using 2Ero function set required

display at the minimum of

the selected range by

pressing or and

to move to the next digit.

Similarly, using 5PAn function set

required display at the maximum

analogue input of the selected range.

Only appears when

RTD inputs

are selected

Only appears

when RTD

inputs are

selected

P E

P E P E

Trim temperature display

With an accurate input trim meter 2ero display

by pressing or and to move to the

next digit. Similary with an accurate input trim

meter 5pan display.

To clear the trim corrections, press in clr.t

function press or to select ye5. Press

to action the clear. A confirmation t. clrd

will be displayed for 3 seconds.

P E

Display

mode

E E

P E

Function

to select

Standard

function

Root extractor

Lineariser

Display

mode

E E

P E

Input type

to select

4-20

0-50

d-rtd

2rtd

3rtd

0.1u

10u

Confirm

selection by

entering 5ure

by pressing

or &

to move to

next digit.

input

4-20

P E

Units of Display

to select

units of

display.

°C

°F

re5s

deg

°c

°o

Only appears

when current

inputs are

selected

tri

clrclr.t

°o

DISPLAY

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