Greystone Energy Systems DP Series Manuel utilisateur

Page 1

INTRODUCTION

The dierential pressure transmitter is designed with dual remote

sensors that enable it to accept high pressure in ranges up to 5

PSI to 500 PSI. All models can handle overload pressure 2X the

maximum fully scale range and burst pressure is 5X the maximum

full scale range.

Features include eld selectable pressure ranges and output signal

types, output reversal and slow damping, port swapping and

bidirectional measurements for the most exible applications. The

output signal is factory calibrated and temperature compensated

for the highest start-up accuracy.

WARNING : Ensure that the maximum individual port pressure

does not exceed the highest pressure range of the unit. For

example, the highest individual port pressure on a 102 Range

Code is 100 PSI. Exceeding this may damage the sensors and

give erroneous readings. See Figure 12 for ratings.

BEFORE INSTALLATION

Read these instructions carefully before installing and

commissioning the dewpoint transmitter. Failure to follow

these instructions may result in product damage. Do not use

in an explosive or hazardous environment, with combustible

or ammable gases, as a safety or emergency stop device or in

any other application where failure of the product could result

in personal injury. Take electrostatic discharge precautions

during installation and do not exceed the device ratings.

MOUNTING

The transmitter mounts on a vertical surface using the two integrated mounting holes. The remote

sensor cable connection should be located on the bottom of the enclosure. The two mounting holes will

facilitate a #10 size screw (not supplied). See Figure 1. Ensure

there is enough space around the unit to make the electrical

connections and that it is within an acceptable distance for

the length of remote sensor cables. Avoid locations with

severe vibrations or excessive moisture. The enclosure has a

standard opening for a conduit connector or cable gland type

tting. In this position the High port is on the left and the Low

port is on the right as shown on the PCB.

The enclosure has a hinged cover with a latch. Open the

cover by pulling slightly on the latch on the bottom side of

the enclosure and at the same time pulling on the cover, as

illustrated in Figure 2.

A 1/2" NPT threaded connection hole is provided in the left

side of the enclosure as shown in Figure 3. Screw the EMT

connector or cable gland connector in until tight. See Figure 4.

It is recommended that weatherproof conduit or cable gland

ttings be used. The F style enclosure includes 1/2" NPT to

M16 thread adapter and cable gland tting.

Two security screws are provided which can be installed to

help secure the cover once settings and wiring connections

are complete. See Figure 4.

Conduit

Figure 1

Figure 2

Figure 4

Figure 3 Figure 5

EMT Connector

Thread adapter and

cable gland tting

Dierential Pressure Transmitter

DP Series - Installation Instructions

Page 2

PLUMBING

The two stainless steel pressure sensors are labeled High and Low. The output signal will indicate a

positive value when the pressure applied to the High sensor is greater than the pressure applied to

the Low sensor, so ensure the sensors are connected correctly as shown in a typical application in

Figure 6. Both sensors incorporate 1/4”NPT male threads for connection to the pipe being monitored.

Do not allow material to fall into the pressure ports as contamination could damage the sensors. It is

recommended to use Teon tape to prevent leaks.

Remove the High pressure sensor from the remote cable by pressing on the release and pulling apart

from the remote cable boot as shown in Figure 7. Wrap 1/4”NPT male sensor threads with Teon tape.

Screw into the sensor port on the pipe being monitored until nger tight. Use an appropriate size

wrench to tighten the sensor until snug as shown in Figure 8. Reconnect the remote sensor cable you

aligning the remote sensor cable boot and pushing rmly onto sensor. See Figure 9.

Repeat for the Low pressure sensor.

Low Pressure

Sensor

Shut O

Valve

Direction of

Water Flow

Direction of

Water Flow

High Pressure

Sensor

Shut O

Valve

Pump

Supply Water

Line

Return Water

Line

Figure 6 Figure 7

Figure 8 Figure 9

CONFIGURATION

Most conguration is done using User Menu setting with LCD and push buttons on PCB. See User Menu

section for details.

Warning: The transmitter must not have power applied during set up or when making changes to

the output signal.

Output Selection:

The transmitter features user-selectable

output signals of 4-20 mA, 0-5 Vdc and

0-10 Vdc. It is factory congured to

operate in the Current (4-20 mA output)

mode, but can be changed to Voltage

mode by sliding the output selection

switch from the position marked mA to

the position marked VOLT as shown in

Figure 10.

In Voltage mode the output scale may

be changed to either 0-5 or 0-10 Vdc by

accessing under User Menu.

Figure 10

Voltage Mode

COM

PWR

OUT

ZERO

ZERO/UPDOWNMENU

Current Mode

VOLT VOLT

VOLT

Press

Page 3

WIRING

• Deactivate the 24 Vac/dc power supply until all connections are made to the device to prevent electrical

shock or equipment damage.

• Use 14-22 AWG shielded wiring for all connections and do not locate the device wires in the same conduit

with wiring used to supply inductive loads such as motors. Make all connections in accordance with

national and local codes.

• Pull at least six inches of wire into the enclosure, then complete the wiring connection according to the

wiring diagram for the applicable power supply and output signal type.

• Connect the plus DC or the AC voltage hot side to the PWR terminal. For voltage output or AC power, the

supply Common is connected to the COM terminal. DO NOT connect power to the OUT terminals as

the device will be damaged. It has half-wave power supply so the supply Common is the same as the

signal Common. See Figure 11.

• The analog output is available on the OUT terminal. Check the controller Analog Input to determine the

proper connection before applying power.

• If using the Zero function, connect the Remote Zero Switch between the ZERO and COM terminals.

Figure 11

Wiring for all output signals and 24 Vac/Vdc

power from controller

Wiring if using the remote zero input

WARNING: Do NOT apply voltage to Zero terminal

Wiring for all output signals and external 24 Vac

power transformer or 24 Vdc power supply

START-UP

Upon applying power to the device, it will enter the start-up mode. The LCD will display the current

operating settings for 2 seconds each.

Version

1.00

1. SOFTWARE VERSION NUMBER

2. MODEL PRESSURE RANGE

P Range

50PSI

3. THE OUTPUT TYPE

Output

4-20mA

At the end of start-up mode the device will enter normal mode displaying pressure read from sensors.

0.0

PSI

Remote Zero

Switch

COM

PWR

OUT

ZERO

External Power Supply

Controller

COM

PWR

OUT

Controller

COM

PWR

OUT

ZERO

External Power Supply

COM

PWR

OUT

ZERO

ZERO/UPDOWNMENU

VOLT

Page 4

P Scale

0 - Max

The default pressure scale is unidirectional 0 to full-scale (ex: 0 - 500 PSI). Use <UP>

or <DOWN> to toggle the setting to a bi-directional scale (ex: ± 500 PSI). The setting

changes from "0 - Max" to "+/- Max.

<MENU> Press to save and advance to next menu item

3. PRESSURE SCALE

USER MENU

The User Menu can be accessed by pressing the <MENU> key at any time after the start-up mode. Note

that the <ZERO> key function changes to an <UP> key function when a menu is active.

The system suspends operation when in the menu and holds the last pressure value as the output value.

If the User Menu is not active for 5 minutes (no key press), then the menu will exit and the device returns

to normal operation.

The User Menu operation and parameters are explained below.

Output

0-5 Vdc

This item only appears if the PCB jumper is in the VOLT position. Use <UP> or

<DOWN> to set the output signal type to 0-5 or 0-10 Vdc. The factory default is 0-5

Vdc.

<MENU> Press to save and advance to next menu item

1. OUTPUT

P. Range

500 PSI

The pressure range defaults to the largest range (1) of the device. Use <UP> or

<DOWN> to step through the four available ranges specic to the model. Available

options are shown below in Figure 12:

2. PRESSURE RANGE

Model 1 2 3 4

01 50 PSI 25 PSI 10 PSI 5 PSI

02 100 PSI 50 PSI 20 PSI 10 PSI

03 250 PSI 125 PSI 50 PSI 25 PSI

04 500 PSI 250 PSI 100 PSI 50 PSI

05 5.0 Bar 2.5 Bar 1.0 Bar 0.5 Bar

06 7.0 Bar 3.5 Bar 1.4 Bar 0.7 Bar

07 10 Bar 5 Bar 2 Bar 1 Bar

08 35 Bar 17.5 Bar 7 Bar 3.5 Bar

09 500 kPa 250 kPa 100 kPa 50 kPa

10 700 kPa 350 kPa 140 kPa 70 kPa

11 1000 kPa 500 kPa 200 kPa 100 kPa

12 3500 kPa 1750 kPa 700 kPa 350 kPa

PRESSURE RANGE

<MENU> Press to save and advance to next menu item

Damping

4 sec

The pressure averaging time for surge damping defaults to 4 seconds. This can be

changed from 1 to 60 seconds using <UP> or <DOWN>.

<MENU> Press to save and advance to next menu item

4. DAMPING

Figure 12

<MENU> Press and release the <MENU> key to enter the User Menu

Page 5

OPERATION

During normal mode the device reads the pressure sensors and calculates the pressure value depending

on the selected range. The pressure value is displayed on the LCD and set as the output value for the analog

output. The output value is updated once per second.

For normal operation such as 0-100 PSI, the pressure applied to the High port must be higher than the

pressure applied to the Low port. If the pressure connection is reversed then the transmitter will always

output 4 mA. If the Low port is left open to ambient pressure, then the High port is used to measure a

positive pressure and 0 PSI = 4 mA and 100 PSI = 20 mA.

For bi-directional operation such as ±100 PSI, the pressure applied to the High port should be higher than

the pressure applied to the Low port for a positive output response. Negative pressure is indicated if the

High pressure is less than the Low pressure. In this case -100 PSI = 4 mA and +100 PSI = 20 mA. Since the

transmitter is linear 0 PSI = 12 mA.

The output value may be aected by device settings such as the pressure damping time. The pressure

averaging setting controls how many readings are averaged to form the output value. For example, if the

pressure averaging value is set to 30 seconds then 30 one-second readings are stored and averaged to

form the output value. The next second will add a new reading and delete the rst to form a new 30 second

average for output. The output gets updated every second with a new average reading. The averaging

value can be set from 1 to 60 seconds via the User Menu.

During normal mode, the device also monitors the <ZERO / UP>, <DOWN> and <MENU> keys and takes

appropriate action. The keys are used to access the User Menu. The device also monitors the Volt/mA

jumper to determine the appropriate output scaling. The voltage span may be set via the User Menu to

either 0-5 Vdc or 0-10 Vdc.

A sensor auto-zero can be initiated by pressing and holding the internal <ZERO> switch for at least 3

seconds. If both pressure ports are close to zero pressure, then the device will calibrate with a new zero

point. The auto-zero can also be initiated by holding the ZERO terminal low for 3 seconds.

Generally, it is not recommended that a span calibration be performed in the eld unless a high-quality

calibrator with low dierential pressure ranges is available and the temperature of the sensor can be

maintained.

P. Port

Direct

The Pressure Port defaults to Direct (HIGH Port = High Pressure, LOW Port =

Low Pressure). Use <UP> or <DOWN> to change it to Reverse (HIGH Port = Low

Pressure, LOW Port = High Pressure) if it is necessary to swap the ports due to a

plumbing error.

<MENU> Press to save and advance to next menu item

6. PRESSURE PORT

Output

Direct

The analog output defaults to Direct (4-20 mA, 0-5 Vdc or 0-10 Vdc). Use <UP> or

<DOWN> to change it to Reverse (20-4 mA, 5-0 Vdc or 10-0 Vdc.

<MENU> Press to save and advance to next menu item

5. OUTPUT

Backlite

Auto

The backlight operation defaults to Auto operation. It can be set to O or On Auto

using <UP> or <DOWN>. Auto means the LCD backlight only lights when a menu

is accessed, o means it never lights and on means it is always on.

<MENU> Press to exit and return to normal operation.

7. BACKLIGHT

Page 6

PRINTED IN CANADA

SPECIFICATIONS

Power Supply....................................24 Vac/dc ± 10% (non-isolated half-wave rectied)

Consumption....................................75 mA max @ 24 Vdc

Output Signal....................................4-20 mA sourcing, 0-5/0-10 Vdc (switch selectable)

Output Drive .....................................Current: 500 ohms max

Voltage: 10K ohms min

Protection Circuitry.........................Reverse voltage protected, transient protected

LCD .......................................................35 x 15 mm (1.4 x 0.6"), 2-line x 8-character

Accuracy .............................................± 1% F.S. of selected range (range 4 is ±2% F.S.) @ 22°C (72°F)

including hysteresis, non-linearity and repeatability

Stability ...............................................± 0.25% FS typical (1 year)

Pressure Ranges...............................4 per model (menu selectable)

Media Compatibility.......................17-4 PH stainless steel

Proof Pressure...................................2X highest range per model

Burst Pressure ...................................20X highest range per model

Maximum Line Pressure................= highest model range

Pressure Cycles.................................> 100 million

Surge Damping................................1-60 seconds averaging (menu selectable)

Zero Adjust ........................................Push-button and remote input

Sensor Operating Range...............-40 to 105°C (-40 to 221°F)

Operating Environment................0 to 50°C (32 to 122°F), 10 to 90 %RH non-condensing

Pressure Connection ......................1/4" NPT male

Sensor Housing................................IP67

Remote Sensor Cable.....................S: FT-6 plenum rated

A: Armored Flexible S/S

Wiring Connection..........................14-22 AWG screw terminal block

Enclosure............................................Polycarbonate, UL94-V0, IP65 (NEMA 4X)

F style includes thread adapter (1/2" NPT to M16) and cable gland tting

Dimensions........................................112.5 W x 116.5 H x 53.7 D mm

(4.43" x 4.59" x 2.11")

Weight.................................................650g (22.9 oz) - Including remote cables and sensors

Country of Origin.............................Canada

DIMENSIONS

116.5 mm

4.585"

53.7 mm

2.115"

0.5" NPT

82.55 mm

3.25"

68 mm

2.67"

Various lengths available

See ordering grid

112.5 mm

4.43"

99.7 mm

3.925"

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