BEKA BA514G Manuel utilisateur

Issue: 4

9th July 2019

BA514G

General Purpose

Tachometer

Issue 4

1. Description

2. Operation

2.1 Initialisation

2.2 Controls

2.3 Displays

3. System Design

3.1 Power supply

3.2 Pulse input

3.2.1 Input switching thresholds

3.2.2 Switch contact input

3.2.3 Open Collector input

3.2.4 2-wire proximity detector input

3.2.5 Magnetic pick-off input

3.2.6 Voltage pulse input

3.3 Remote reset

4. Installation

4.1 Location

4.2 Installation procedure

4.3 EMC

4.4 Units of measurement and tag marking on

scale card.

5. Configuration and Calibration

5.1 Configuration structure

5.2 Accessing configuration functions

5.3 Summary of configuration functions

5.4 Input: inPut

5.5 Input type: inP .tYPE

5.6 Debounce: dEbouncE

5.7 Display update interval: uPdAtE

5.8 Run-time display: di5P-2

5.9 Position of the decimal points: dP

5.10 Speed scale factor: 5CALE .5

5.11 Timebase: t-bA5E

5.12 Display filter: FiLtEr

5.13 Clip-off: CLP oFF

5.14 Local reset: LoC clr

5.15 Local run-time reset: clr tot

5.16 Local grand total run-time reset: clr gtot

5.17 Grand total run-time reset from within the

configuration menu: Clr .Gtot

5.18 Security code: CodE

5.19 Reset configuration to factory defaults:

r5Et def

5.20 Pulse output

5.20.1 System designing

5.20.2 Configuration

5.20.3 Access Pulse output sub-menu

5.20.4 Enable pulse output

5.20.5 Source of output pulse

5.20.6 Divide output pulse frequency

5.20.7 Output pulse width

5.20.8 Pulse storage

6. Configuration example

6.1 Configuration procedure

7. Maintenance

7.1 Fault finding during commissioning

7.2 Fault finding after commissioning

7.3 Servicing

7.4 Routine maintenance

7.5 Guarantee

7.6 Customer comments

2222222222222222222

CONTENTS

The BA514G is CE marked to show compliance with the European EMC Directive 2014/30/EU

8. Accessories

8.1 Units of measurement and instrument

identification on scale card.

8.2 Legend plate

8.3 Display backlight

8.4 Alarms

8.4.1 Solid state output

8.4.2 Configuration & adjustment

8.4.3 Alarm enable: EnbL

8.4.4 Type of alarm: tYPE

8.4.5 Setpoint adjustment: 5P1x & 5P2x

8.4.6 Alarm function: Hi .Lo

8.4.7 Alarm output status: no .nC

8.4.8 Hysteresis: H5tr

8.4.9 Alarm delay: dELA

8.4.10 Alarm silence time: 5IL

8.4.11 Flash display when alarm occurs:

FL5H

8.4.12 Access Setpoint: AC5P

8.4.13 Adjusting alarm setpoints

from the display mode.

8.5 4/20mA output

8.5.1 System design

8.5.2 Configuration & calibration

8.5.3 Access 4/20mA output sub-menu:

4-20 oP

8.5.4 Enable 4/20mA output: EnbL

8.5.5 Display which corresponds to 4mA

output: 4.000

8.5.6 Display which corresponds to 20mA

output: 20 .000

CONTENTS CONTINUED

1. DESCRIPTION

The BA514G is a general purpose, field mounting

Tachometer primarily intended for measuring

rotational speed. To assist with routine maintenance,

the Tachometer includes a run-time clock that records

the number of hours that the monitored machinery has

been operating. The BA514G is controlled and

configured via the four front panel push buttons, a

user defined four digit code may be entered to prevent

accidental access to the instrument's configuration

menu.

This instruction manual supplements the abbreviated

instruction sheet supplied with each instrument.

2. OPERATION

Fig 1 shows a simplified block diagram of the

BA514G Tachometer. The instrument can accept

pulses from most types of sensor and display speed

per second, minute or per hour, plus run-time in

hours on a separate display.

The BA514G has a single pair of input terminals for

connection to all types of sensor. When connected to

a sensor requiring energising to determine its state,

such as a switch contact, open collector or a two

wire proximity detector, an external link between

terminals 3 and 4 connects power to the sensor

input terminals. The isolated pulse output can be

configured to synchronously retransmit the input

pulse, or a frequency divided frequency output with a

defined pulse width.

Factory fitted accessories include an internally

powered display backlight, dual alarms and an

isolated 4/20mA output which may be configured to

retransmit any part of the speed display.

Fig 1 BA514G block diagram

2.1 Initialisation

Each time power is applied to a Tachometer

initialisation is performed. After a short delay the

following display sequence occurs:

All segments of the display are activated

Tachometer starts functioning, using the

configuration information stored in the

instrument’s permanent memory. Unless the

run-time display has been reset to zero, new

elapsed time will be added to the existing

run-time total.

2.2 Controls

The BA514G is controlled and configured via four

front panel push buttons. In the display mode i.e.

when the instrument is displaying speed the push

button functions are:

Push Button Functions

& + * Resets run-time display to zero.

This is a configurable function.

See 5.15

)

+ *Run-time grand total.

If buttons are pressed for ten seconds or

longer grand total run-time is reset to

zero. This is a configurable function.

See 5.16

(+ &Shows in succession, firmware version

number, instrument function tacho and

any output accessories that are fitted:

- A Dual alarm outputs

- P Pulse output (Always fitted)

- C 4/20mA output

( + )Access to configuration menu

Note: When optional alarms are fitted, the

Tachometer may be configured to provide direct

access to the alarm setpoints from the display mode

when the (and *buttons are operated

simultaneously.

See 8.4.12 and 8.4.13

2.3 Displays

The BA514G has two digital displays and associated

annunciators, plus a pulse input indicator as shown

on the front cover of this manual.

Speed On upper eight digit display

display

Run-time On lower six digit display.

display Shows time in hours, with a

resolution of 0.1 hours, that

monitored machinery has been

operating. May be turned off.

See 5.8

Pulse input This disc in the lower left hand

indicator corner of the display 'rotates'

for two seconds each time an

input pulse is received.

Appears to rotate continuously

when input frequency exceeds

0.5Hz.

Hold Activated when input frequency

annunciator is below the clip-off threshold at

which the run-time timer stops

functioning.

Reset Activated while run-time display

annunciator is being reset to zero.

Grand total Activated while run-time grand

annunciator total which is shown in hours is

being displayed.

RTx Retransmitted pulse

annunciator annunciator.

Depends upon the setting of

5ource in the pulse output

configuration menu.

5caled:

Annunciator activated each

time pulse output open

collector is on, i.e. Ron is

less than 60+ 3V.

direct:

Annunciator continuously

activated.

3. SYSTEM DESIGN

Fig 2 illustrates the basic circuit that is used for all

BA514G Tachometer installations. For simplicity,

connections for the pulse output are shown in section

5.20. The optional alarms and 4/20mA output are

described in section 8 this manual.

When designing a system it is important to remember

that terminals 2, 6 and RS2 are interconnected within

the BA514G. See Fig 1.

3.1 Power supply

The BA514G Tachometer requires a minimum of 10V

between terminal 1 & 2 and consumes:

10mA without optional backlight

plus 6mA when terminals 3 & 4 are linked

plus 16mA with optional backlight

A 24V dc regulated supply with a current limit is

suitable.

Fig 2 Basic Tachometer system

3.2 Pulse input

Fig 2 illustrates how the BA514G can display the

speed and total run-time from sensors with a wide

variety of pulse outputs.

3.2.1 Input switching thresholds

The following table shows the Tachometer's input

switching thresholds when conditioned for use with

sensors having different outputs. For reliable

operation the Tachometer's pulse input must fall

below the lower threshold and rise above the upper

threshold.

Input transducer

Switching thresholds

Lower Upper

Open collector 2k10k

Voltage pulse low 1.0V 3.0V

Voltage pulse high 3.0V 10.0V

Magnetic pick-off 0mV 40mV peak

Proximity detector 1.2mA 2.1mA

Switch 1001000

Sensors with a switch contact, proximity detector or

an open collector output require energising to

determine their state which is achieved by linking

Tachometer terminals 3 and 4.

3.2.2 Switch contact input

Any sensor with a switch contact output such as a

reed relay may be connected to the Tachometer.

The BA514G contains a configurable debounce

circuit to prevent contact bounce being counted.

See section 5.6.

3.2.3 Open collector input

Sensors with an open collector output may be

directly connected to input terminals 5 & 6. Polarity

should be observed The BA514G contains a

configurable debounce circuit to prevent false

triggering. See section 5.6.

3.2.4 2-wire proximity detector input

Most NAMUR 2-wire proximity detectors may be

directly connected to a BA514G input terminals 5 &

6 providing the minimum operating voltage of the

proximetor is greater than 7.5V. The BA514G

contains a configurable debounce circuit to prevent

false triggering. See section 6.6.

3.2.5 Magnetic pick-off input

Sensors incorporating a magnetic pick-off to detect

rotation will have a low level ac voltage output unless

the sensor incorporates an amplifier. CoiL in the

BA514G input configuration menu is a low level

voltage pulse input intended for use with a magnetic

pick-off. The BA514G Tachometer contain a

configurable debounce circuit to prevent false

triggering. Three levels of de-bounce protection are

independently available. See section 5.6.

3.2.6 Voltage pulse input

Two voltage pulse input ranges are selectable in the

BA514G Tachometer configuration menu, VoLt5 L and

VoLt5 H. The Tachometer input terminals 5 and 6 may

be connected to any voltage pulse output sensor. The

BA514G contains a configurable debounce circuit to

prevent false triggering. See section 5.6.

3.3 Remote reset

The BA514G Tachometer's run-time display may be

remotely reset to zero by connecting terminals RS1

and RS2 together. Permanent interconnection

inhibits the run-time clock. Remote resetting may be

accomplished by any switch contact.

The BA514G run-time display may also be reset

when the &and *push buttons are operated

simultaneously in the display mode i.e. when the

instrument is displaying speed. See 5.15

4. INSTALLATION

4.1 Location

The BA514G Tachometer is housed in a robust IP66

glass reinforced polyester (GRP) enclosure

incorporating an armoured glass window and stainless

steel fittings, making it suitable for exterior mounting in

most industrial on-shore and off-shore installations.

The Tachometer should be positioned where the

display is not in continuous direct sunlight.

Field wiring terminals are located on the rear of the

Tachometer assembly as shown in Fig 4.

To ensure electrical continuity between the two

conduit or cable entries, the enclosure back-box is

fitted with a bonding plate which includes an M4 earth

stud. The bonding plate may be mounted on the

inside or outside of the enclosure. If the carbon

loaded GRP enclosure is not bolted to an earthed post

or structure, this earth stud should be connected to a

local earth or to the plant potential equalising

conductor.

An insulated M4 stud is provided in the bottom right

hand corner the back-box for interconnecting cable

screens.

The BA514G Tachometer may be pipe mounted using

a BA393G pipe mounting kit, or panel mounted using

a BA394 or BA395 panel mounting kit. All are

available as accessories.

4.2 Installation Procedure

Fig 3 illustrates the instrument installation procedure.

A. Remove the Tachometer assembly by

unscrewing the four captive 'A' screws.

B. Mount the enclosure back-box on a flat surface

and secure with screws or bolts through the four

'B' holes. Alternatively use one of the pipe or

panel mounting kits which are available as

accessories.

C. Remove the temporary hole plug and install an

appropriate IP and temperature rated M20 x

1.5mm cable gland or conduit fitting. If two

entries are required, the supplied IP66 stopping

plug should be replaced with an appropriate IP

and temperature rated M20 x 1.5mm cable gland

or conduit fitting.

D. Feed the field wiring through a gland in the

back-box and tighten to maintain ingress

protection. Connect the field wiring to the

terminals as shown in Fig 4. Replace the

instrument assembly on the back-box and evenly

tighten the four 'A' screws.

Fig 3 BA514G installation procedure

Fig 4 Dimensions and terminal connections

4.3 EMC

The BA514G complies with the requirements of the

European EMC Directive 2014/30/EU. For specified

immunity all wiring should be in screened twisted

pairs, with the screens earthed at a common point.

4.4 Units of measurement and tag marking

on scale card.

The Tachometer's units of measurement and tag

information can be shown on a scale card which

slides into the instrument.

New Tachometers are supplied with a printed scale

card showing the requested units of measurement

and tag information. If this information is not supplied

when the instrument is ordered, a blank scale card will

be fitted which can easily be marked on-site with a dry

transfer or a permanent marker. Custom printed scale

cards are available from BEKA associates as an

accessory.

To remove the scale card from a Tachometer carefully

pull the transparent tab at the rear of the instrument

assembly away from the assembly as shown in

Fig 5a.

Fig 5a Removing scale card

To replace the scale card carefully insert it into the slot

on the right hand side of the input terminals as shown

in Fig 5b. Force should be applied evenly to both

sides of the scale card to prevent it twisting. The

card should be inserted until about 2mm of the

transparent tab remains protruding.

Fig 5b Inserting scale card into the

instrument assembly.

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