Table of Contents
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Contents
1.
Introduction
2.
2.1
2.2
2.3
2.4
3.
4.1
4.2
4.3
4.4
Timebase
5.
6.
7.
8.
9.
Externally powered pulse input Rate Totalisers
APPLICATION GUIDE AG334
Externally powered pulse input Rate Totalisers
For models with an 'E' or 'G' suffix
1. Introduction
This Application Guide is intended to aid the selection
of the most suitable pulse input Rate Totaliser from the
extensive range of models manufactured by BEKA
associates. The guide also contains flow measurement
background information and configuration examples.
This guide does not contain detailed system design or step-
by-step configuration information which are contained in
the instruction manual for each model. Detailed installation
and certification information for use in hazardous areas
is also contained in the instruction manual for each
model which can be viewed on the BEKA website at
www.beka.co.uk
Each output pulse from a flowmeter or flow transducer
represents a defined volume that has passed through the
flowmeter. The total number of pulses therefore represents
the total volume and the pulse frequency represents the
rate of flow passing through the flowmeter. All BEKA
pulse input Rate Totalisers have similar functions and are
able to calculate and display the total flow and the rate of
flow of most pulse output flowmeters.
The BEKA Rate Totaliser range includes field and panel
mounting models for general purpose applications and for
use in gas and dust hazardous areas. All models can be
supplied with a wide range of factory fitted options including
display backlights, alarm outputs and isolated pulse and
current outputs for retransmission applications.
models have two pulse inputs enabling the instrument to
calculate and display the sum or difference of the total flow
and rate of flow passing through two flowmeters.
All models are configured and calibrated via four push
buttons using a common configuration menu. Although
easy to configure on-site without the need for test
equipment, Rate Totalisers can be supplied configured
and ready for installation with a printed slide-in scale card
showing customer specified information for no additional
charge.
BEKA also manufacture loop powered 4/20mA Rate
Totalisers which have similar functions and are described
in a separate Application Guide.
Some
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Table of Contents
Related Manuals for BEKA BA334E
Summary of Contents for BEKA BA334E
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Page 1: Table Of Contents
Total scale factor flowmeter. The total number of pulses therefore represents Rate scale factor the total volume and the pulse frequency represents the 4.3.1 Resolution rate of flow passing through the flowmeter. All BEKA Timebase pulse input Rate Totalisers have similar functions and are able to calculate and display the total flow and the rate of Linearisation flow of most pulse output flowmeters. - Page 2 BA334E BA334G BA384E BA384G Model Some shown with optional backlight Enclosure Field Field Field Field material, size and IP rating 141 x 212mm 122 x 120mm 141 x 212mm 122 x 120mm IP66 IP66 IP66 IP66 Number of M20 cable entries...
- Page 3 BA334NG BA384NG BA534G BA584G Field Field 122 x 120mm 122 x 120mm IP66 IP66 Primary: 8 digits 18mm high Secondary: 6 digits 12mm high Ex nA ic IIC T5 Gc -40°C ≤ Ta ≤ +60°C Ex ic tc IIIC T80°C Dc -40°C ≤...
- Page 4 BA337E BA338E BA388E BA337E-SS Model Some shown with optional backlight Panel Panel Rugged panel Enclosure Noryl Noryl 316 stainless steel material & size 96 x 48 mm 144 x 72 mm 105 x 60 mm Protection Front IP66, rear IP20 Display Primary: Primary: 8 digits 18mm high...
- Page 5 BA337NE BA537E BA538E BA588E BA537E-SS Rugged panel Rugged panel Panel Panel 316 stainless steel 316 stainless steel Noryl Noryl 105 x 60 mm 105 x 60 mm 96 x 48 mm 144 x 72 mm Front IP66, rear IP20 Front IP66, rear IP20 Primary: Primary: Primary: 8 digits 18mm high...
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Page 6: Selecting A Model
Field mounting Rate Totalisers are surface mounting, but can be be pipe or panel mounted using one of the BEKA accessory kits. BA393G 316 stainless steel kit, attaches instrument to any vertical or horizontal pipe with outside diameter between 40 and 73mm. -
Page 7: Panel Mounting
Ex nA non-sparking and Ex tc dust ignition protection and Ex tc by enclosure. Please see BEKA Application Guide AG310 for more information on how to install this Rate Totaliser. The rear of panel ingress protection of all 96 x 48mm and... -
Page 8: Two Input Models
3. Rate Totaliser function When selecting a Rate Totaliser for installation in a All BEKA externally powered pulse input Rate Totalisers hazardous area, the instrument’s hazardous area certificate have similar functions, although the number of inputs and should be consulted to ensure that the instrument has the output options may differ. Fig 1 shows a simplified... -
Page 9: Rate Totaliser Configuration
0.0001 and 99999 0.0001 and 99999 4. Rate Totaliser Configuration All models are configured and calibrated using a common Total display intuitive menu structured in the same way as all BEKA 88888888 instruments. The menu is accessed via the four instrument Timebase t-bA5E push buttons and can be protected by a user defined four 1 for rate per second 60 for rate per minute digit access code. - Page 10 However, to enable the total display to be in different engineering units, or in multiples of the All BEKA pulse input Rate Totalisers achieve this engineering units produced by factor such as thousand conversion using a configurable dividing constant called of litres or gallons, an additional scaling factor 5CALE .
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Page 11: Resolution
4.3 Rate scale factor 5cale . r Function 5CALE . r is similar to 5cale t described in the previous section. As shown in section 4.1 the Rate Totaliser function factor is used to convert the number of input pulses received from the flowmeter into engineering units such as litres or gallons. If the Rate Totaliser’s rate display is required in the engineering units produced by factor no further scaling is required. -
Page 12: Linearisation
To minimise display errors resulting from flowmeter of the position of the displayed decimal point. When non-linearity, all BEKA Rate Totalisers incorporate a 16 5CALEd is selected the Rate Totalisers pulse output segment straight line lineariser which when correctly frequency may be divided by: configured will compensate for the flowmeter non-linearity. -
Page 13: Optional 4/20Ma Output
7. Optional 4/20mA output 9. Slide-in scale card All BEKA Rate Totalisers can be supplied with a factory All Rate Totaliser’s, except the ‘E’ suffix field mounting fitted galvanically isolated 4/20mA current sink output which models, have a slide-in scale card which can be printed can be used for retransmission to other instrumentation. -
Page 14: Configuration Examples
Minute with a resolution of 1. Example 1 An output pulse is required for each 0.1m³ of total flow. In this example a user required a BEKA Rate Totaliser to display total flow in Gallons with a resolution of 0.1 and the The flowmeter has a K-factor of 1 pulse per litre. flow rate in Gallons per Minute with a resolution of 1. An output pulse is required for each gallon of total flow. Summary Flowmeter K-factor 1 pulse / litre The flowmeter has a K-factor of 10 pulses per Gallon. - Page 15 Example 3 Example 4 The requirements of this example are identical to those for This example illustrates how a Rate Totaliser can display example 2 except for the pulse output. In this example an total flow and the rate of flow from a stroke sensor on a output pulse is required for each litre of flow. which is the reciprocating pump.
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Page 16: Additional Information
Example 5 Rate Display This example illustrates how a BEKA two input Rate 5CALE . r-A Totaliser can be used to display the rate of flow and 5CALE . r-b the total flow of two reciprocating mud pumps and their dP rAtE composite rates and totals i.e.
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