BEKA BA514G User manual

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
3
CONTENTS CONTINUED

4

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
5

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.
6

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.
7

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
8

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
9

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.
10