Dwyer Instruments PUB-10 Manual de usuario

DWYER INSTRUMENTS, INC. | www.dwyer-inst.com322

Flow Transmitters,

Ultrasonic, Portable FLOW

PORTABLE ULTRASONIC FLOWMETER KIT

Portable,Non-Invasive and Data Logging Option

The SERIES PUB & PUF Portable Ultrasonic Flowmeter Sets utilize the transit-time

difference for measuring ow rates in pipes non-invasively. Units offer ow rate local

display with analog and pulsed outputs. The Series PUF offers the same features plus

data logging capability.

FEATURES/BENEFITS

• Non-invasive pipe measurement

• Compact and lightweight

• Incorporate the latest electronics and signal processing technologies realizing high

performance and easy operation

• Ideal for on-the-go ow monitoring, capable of 20 hours continuous operation with

built-in, rechargeable battery

• Easy to read graphic display with convenient backlight for visual comfort

• Efcient layout of the function keys for easy to use programming

• PUB features rugged carrying case with molded foam inserts

• PUF boasts an IP67 rated case to hold and protect all equipment conveniently

6-39/64

[168.00]

10-25/64 [264.00]

1-31/32

[50.00]

SPECIFICATIONS

Service: Homogeneous liquids that do not contain air bubbles capable of ultrasonic

wave propagation.

Inputs: Lemo connector cable from sensors.

Range: 0.33 to 65.62 ft/s (0.1 to 20 m/s).

Display: 240 x 64 pixel graphic display, high contrast black on white with backlight;

Languages: English, French, German, Swedish, Italian, Spanish, Portuguese,

Russian, Norwegian, and Dutch; 5.2˝ W x 1.5˝ H.

Accuracy: ±0.5 to 2% of ow reading for ow rate > 0.66 ft/s (0.2 m/s) and pipe ID

> 2.95 in (75 mm); ±3% of ow reading for ow rate > 0.66 ft/s (0.2 m/s) and pipe ID

in range 0.512 to 2.95˝ (13 to 75 mm); ±6% of ow reading for ow rate < 0.66 ft/s

(0.2 m/s).

Power Requirements: 9 to 24 VDC, (1) 5-Cell NiMH battery, internal, factory

replaceable (continuous operation time: 20 hours with back-light and output off)

(recharging time: 6.5 hours, power adapter used).

Power Consumption: 10.5 W.

Power Adapter: 110/240 VAC adapter. UK,US, European adapters included.

Temperature Limits: -4 to 275°F (-20 to 135°C).

Outputs: Analog: 1 opto-isolated output: 4 to 20 mA, 0 to 16 mA or 0 to 20 mA

(selectable); Error current: 0 to 26 mA (selectable); Load resistance: 620 Ω max;

Pulse: 1 opto-isolated MOSFET relay, 150 mA max, 500 pps max, 200 Hz max.

Serial Communications: USB; RS-232 (PUF only).

Enclosure Rating: Converter: IP54; Transducers: IP51.

Materials: Flame retardant injection molded ABS plastic.

Repeatability: ±0.5 % of measured value or ±0.066 ft/s (0.02 m/s).

Electrical Connections: Multi-pin Lemo plugs.

Turbidity: < 3% by volume of particulate content.

Permissible Air Content: < 3% by volume.

Response Time: < 500 ms.

Weight: Unit without accessories: 2.3 lb (1.06 kg); Unit with accessories in carrying

case: 13.23 lb (6.0 kg).

Agency Approvals: CE.

ADDITIONAL SPECIFICATIONS

Applicable Pipe Material: Carbon steel, SS, copper, UPVC/PVDF, concrete,

galvanized steel, mild steel, glass, brass.

Applicable Pipe Lining: Rubber, glass, concrete, epoxy, steel, other*.

Pipe Wall Thickness: 0.04 to 3˝ (1 to 75 mm).

Pipe Lining Thickness: < 1˝ (< 25 mm).

*Selectable option for special material with known propagation rate of lining material.

PUB

PUF

APPLICATIONS

• Water treatment

• Industrial systems

• Irrigation applications

• Treated water ow

• River water

• Sea water

• Potable water

• Demineralized water

• Glycol/water mix

• Hydraulic system

• Diesel oil

• Water use data logging

KIT INCLUDES

• Converter

• Set of transducers

• Transducer holders

• Set of transducer cables (6.56´ (2 m))

• 4 to 20 mA communication cables

• 12 VDC power supply

• Ultrasonic coupling grease

• Set of chains

• Ruled guide rail

• Test block

• Carrying case

SERIES PUB & PUF

USA: California Proposition 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

OPTIONS

Use order code: Description

NISTCAL-FU NIST traceable calibration certicate

MODEL CHART - STANDARD VERSION

Model Pipe Size Range in (mm)

PUB-10

PUB-20

0.5 to 4.5 (13 to 115)

2 to 40 (50.7 to 1016)

MODEL CHART - DATA LOGGING VERSION

Model Pipe Size Range in (mm)

PUF-1001

PUF-1002

PUF-1003

0.5 to 78 (13 to 2000)

0.5 to 4.5 (13 to 115)

2 to 78 (50 to 2000)

Series PUB Portable Ultrasonic Flowmeter Kit

Installation and Operating Instructions

Bulletin F-PUB

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, USA

Phone: 219/879-8000 www.dwyer-inst.com

Fax: 219/872-9057 email: info@dwyer-inst.com

Table of Contents

1: General Description 1

1.1 Introduction 1

1.2 Principles of Operation 2

1.3 Supplied Hardware 3

1.4 PUB Instrument 4

1.4.1 Connectors 4

1.4.2 Keypad 5

1.4.3 Power supply and battery charging 6

1.5 Transducers 6

2: Installation 7

2.1 Transducer Positioning 7

2.2 Transducer Attachment 8

2.2.1 Preparation 8

2.2.2 Attaching the transducer holders 8

2.2.3 Fitting the transducers 9

3: Operating Procedures 10

3.1 Setting-up the Instrument 11

3.1.1 Using the instrument for the first time 11

3.1.2 Enabling/disabling the backlight 12

3.2 Using the Quick Start Menu 13

3.3 Using the System at a Regularly Monitored Location 16

3.4 Managing Named Sites 18

3.4.1 Setting up a new site 18

3.4.2 Changing a site name 19

3.5 Instrument Calibration 19

3.5.1 Adjusting the zero cut-off 19

3.5.2 Adjusting the set zero flow offset 19

3.5.3 Adjusting the calibration factor 20

3.5.4 Adjusting the roughness factor 21

3.5.5 Adjusting the damping factor 22

3.6 Performing Monitoring Functions 23

3.6.1 How to measure totalized flows (manually) 23

3.6.2 How to stop the totalizer temporarily 24

3.7 Configuring the Current / Pulse Output 24

3.7.1 Current output 24

3.7.2 Pulse output 26

4: Maintenance & Repair 29

4.1 Warranty / Return 29

5: Troubleshooting 30

5.1 Overview 30

5.2 General Troubleshooting Procedure 31

5.3 Warning & Status Messages 32

5.4 Test Block 34

5.5 Microprocessor Reset Facility 35

5.6 Diagnostics Display 35

6: Specification 37

1: General Description

1.1 Introduction

This manual describes the operation of the Dwyer PUB portable flowmeter. The flowmeter is designed to work

with clamp-on transducers to enable the flow of a liquid within a closed pipe to be measured accurately without

needing to insert any mechanical parts through the pipe wall or protrude into the flow system.

Using ultrasonic transit time techniques, the PUB is controlled by a micro-processor system which contains a

wide range of data that enables it to be used with pipes with an outside diameter ranging from 0.5 to 40 inches

(13 to 1000 mm), depending on model, and constructed of almost any material. The instrument will also operate

over a wide range of fluid temperatures.

The PUB series comprises two models which are identical in operation but designed to be used with a different

range of pipe diameters. The PUB-A can be used with pipes in the range 0.5 to 4.5inches (12.7 to 114 mm) and

the PUB-B with pipes in the range 2 to 40 inches (50.8 to 1016 mm).

Easy to operate, the PUB standard features are:

•Large, easy to read graphic display with backlighting.

•Simple to follow dual function keypad.

•Simple ‘Quick Start’ set up procedure.

•Continuous signal monitoring.

•Pulse output volumetric or frequency).

•4 to 20 mA, 0 to 20 mA, or 0 to 16 mA output.

•Rechargeable battery.

•Battery management.

•Diagnostics.

Volumetric flow rates are displayed in L/h, L/min, L/sec, gal/min, gal/h, USgals/min, USgals/h, Barrel/h, Barrel/

day, m³/s, m³/min, m³/h. Linear velocity is displayed in meters or feet per second.

When operating in the ‘Flow Reading’ mode the total volumes, both positive and negative, are displayed up to a

maximum 12-digit number.

The flowmeter can be used to measure clean liquids or oils that have less than 3% by volume of particulate

content. Cloudy liquids such as river water and effluent can be measured along with cleaner liquids such as

demineralized water.

Typical PUB applications include:

•River water.

•Seawater.

•Potable water.

•Demineralized water.

•Treated water.

1: General Description

1.2 Principles of Operation

When ultrasound is transmitted through a liquid, the speed at which the sound travels through the liquid is

accelerated slightly if it is transmitted in the same direction as the liquid flow, and decelerated slightly if

transmitted against it. The difference in time taken by the sound waves to travel the same distance but in opposite

directions is therefore directly proportional to the flow velocity of the liquid.

The PUB system employs two ultrasonic transducers attached to the pipe carrying the liquid and compares the

time taken to transmit an ultrasound signal in each direction. If the sound characteristics of the fluid are known,

the PUB microprocessor can use the results of the transit time calculations to compute the fluid flow velocity.

Once the flow velocity is known the volumetric flow can be easily calculated for a given pipe diameter. The PUB

system can be set up to operate in one of four modes, determined mainly by the pipe diameter and the transducer

set in use. The diagram below illustrates the importance of applying the correct separation distance between the

transducers to obtain the strongest signal.

Figure 1.1 Operating modes

Fluid flow

Separation

Distance

Separation

Distance

Separation

Distance

Separation

Distance

Reflex mode

Reflex mode (double bounce)

Reflex mode (triple bounce)

Diagonal mode

This is the mode most commonly used.

The two transducers (U & D) are attached

to the pipe in line with each other and the

signals passing between them are reflected

by the opposite pipe wall.

The separation distance is calculated by

the instrument in response to entered data

concerning the pipe and fluid characteristics.

In this mode the separation distance is

calculated to give a double bounce. This is

most likely to occur if the pipe diameter is

so small that the calculated reflex mode

separation distance would be impractical

for the transducers in use.

This illustration goes one step further to show

a triple bounce situation. This would normally

apply when working with very small pipes

relative to the transducer range.

This mode might be selected by the

instrument where relatively large pipes are

concerned. In this mode the transducers are

located on opposite sides of the pipe but the

separation distance is still critical in order

for the signals to be received correctly.

Upstream

transducer

1: General Description

1.3 Supplied Hardware

The PUB equipment is supplied in a rugged polypropylene carrying case fitted with a foam insert to give added

protection for transportation. The supplied components are shown in Figure 1.2.

Figure 1.2 Standard PUB equipment

Standard equipment

•PUB instrument with backlit graphic display.

•Power supply - with UK, US, European adaptors. 110/240 VAC.

•4 to 20 mA/Pulse Output cable.

•2 lengths of chain.

•Test block.

•Transducer cables (x2) 79 inches (2m) long.

•Transducer set (x2) – type ‘A’ or type ‘B’ depending on model.

•Set of transducer holders used for mounting the transducers.

•Ruled separation bar (2-piece).

•Ultrasonic couplant with syringe dispenser used when mounting the transducers.

•Manual.

4 to 20 mA /

Test Block

Power Supply

Pulse Output

Cable

Transducer Cables (x2)

Chains (x2)

Transducer

Transducers

(Sensors x2)

Ultrasonic Couplant

Ruled Separation bar (x2) PUB Instrument

(Batt. Charger)

Holders (x2)

1: General Description

1.4 PUB Instrument

The PUB is a microprocessor controlled instrument operated through a menu system using an inbuilt LCD display

and keypad. It can be used to display the instantaneous fluid flow rate or velocity, together with totalized values.

The instrument can also provide a variable current or variable ‘pulse’ (volumetric of frequency) output that is

proportional to the detected flow rate. This output can be calibrated to suit a particular flow range and used with a

range of external interface devices such as those found in building management or site monitoring systems.

1.4.1 Connectors

Figure 1.3 Instrument details

Transducer connections

The transducers are connected to two color-coded miniature coaxial sockets located on the top of the instrument.

Using the red/blue connector cables provided, the upstream transducer should always be connected to the RED

socket and the downstream transducer to the BLUE one for a positive flow reading. It is safe to connect or

disconnect the cable while the instrument is switched on.

4 to 20 mA and Pulse output connection

The 4 to 20mA / ‘pulse’ output cable should be connected to the green 7-pin connector on the top of the

flowmeter, as shown in Figure 1.3. A single cable that can be adapted for use for either of these output functions

is included in the PUB kit. The ‘tails’ on the free end of the cable must be terminated to suit the intended

application.

Red – 4 to 20 mA positive

Black – 4 to 20 mA negative

White – Pulse output

Green – Pulse return

Thick Black – Cable screen

Battery charger connection

The supplied battery charger is connected to the instrument by means of the gray 2-pin connector on the bottom

of the unit, as shown in Figure 1.3.

Note: The above connectors have different key-ways to prevent incorrect cable connection.

Keypad

LCD Display

Battery Charger

4-20mA / Pulse Output Transducer Cables

Reset pin-hole

1: General Description

Figure 1.4 Keypad

1.4.2 Keypad

The instrument is configured and controlled via a 16-key tactile membrane keypad, as shown in Figure 1.4.

ON/OFF Key

The ON/OFF key is shown on the top left of the keypad. When turned ON an initialization screen is displayed on

the LCD showing the instrument’s serial number and software revision. Once this appears, the instrument can be

started by pressing the ENTER key once – the initialization screen is then replaced by a MAIN MENU which

provides access to the remaining functions.

Menus and the menu selection keys

The PUB menus are arranged hierarchally with the MAIN MENU being at the top level. Menu navigation is

achieved by three keys on the right hand side of the keypad which are used to scroll UP and DOWN a menu list and

SELECT a menu item. When scrolling through a menu, an arrow-shaped cursor moves up and down the left hand

side of the screen to indicate the active menu choice which can then be selected by pressing the ENTER

(SELECT) key.

Some menus have more options than can be shown on the screen at the same time, in which case the

‘overflowed’ choices can be brought into view by continuing to scroll DOWN beyond the bottom visible item. Menus

generally ‘loop around’ if you scroll beyond the first or last items.

If you select Exit on any menu it usually takes you back up one level in the menu hierarchy, but in some cases it

may go directly to the ‘Flow Reading’ screen.

Some screens require you to move the cursor left and right along the display as well as up and down. This is

achieved using keys 5 (scroll LEFT) and 6 (scroll RIGHT).

Dual function numerical keypad

The block of keys shown in the center of the keypad in Figure 1.4 are dual function keys. They can be used to

enter straight-forward numerical data, select the displayed flow units, or provide quick access to frequently

required control menus.

Note: Some of the features accessed by these keys are restricted in the PUB model range. An “Option not

available” message is displayed if you select a restricted function.

ON/OFF Scroll UP

ENTER

Scroll DOWN

Numerical keypad

Scroll LEFT Scroll RIGHT with dual function keys

(SELECT)

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