Greystone Energy Systems LP-S Manuel utilisateur

Page 1

INTRODUCTION

The Low Pressure Transducer can be used to measure positive,

negative or dierential pressure in the ranges of 1”wc to 20”wc.

The highly accurate piezoresistive sensor is ideal for monitoring

pressure of non-corrosive, non-ionic working uids such as clean

dry air or other inert gases. It features eld selectable pressure

ranges and output signal types for the most exible application.

Typical HVAC applications include monitoring of lter dierential

pressure or clean room pressure. The output signal is factory

calibrated and temperature compensated for highest startup

accuracy and trouble-free operation.

BEFORE INSTALLATION

Read these installation instructions carefully before

commissioning the Pressure Transducer. 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 safety or emergency stop devices or in

any other application where failure of the product could result

in personal injury. Use electrostatic discharge precautions during installation and do not exceed the

device ratings.

MOUNTING

The transducer mounts on a vertical surface using the two integrated mounting holes. Ensure there is

enough space around the unit to connect the pressure tubing without kinking and to make the electrical

connections, avoid locations with severe vibrations or excessive moisture. Drill a hole in the duct and

insert so the probe point is facing into the air ow. The enclosure has a standard opening for a 1/2”

conduit and may be installed with either conduit and a conduit coupler or a cable gland type tting. See

Figure 1.

The two mounting holes will facilitate a #10 size screw (not supplied). See Figure 1.

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

cover by pulling slightly on the latch on the right 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 on the

bottom side of the enclosure. Screw the EMT connector

or cable gland connector in until tight. See Figure 3. 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. See Figure 3.

Two security screws are provided which can be installed to

help secure the cover once settings and wiring connections are

complete. See Figure 4.

Figure 1

Figure 2

Figure 3 Figure 4

EMT Connector

Thread adapter and

cable gland tting

Duct Low Pressure Transducer

LP-S - Installation Instructions

Page 2

WIRING

The transmitter has standard screw block connectors and easy wire access to facilitate wiring. It is

recommended that shielded twisted pair wiring at least 22 AWG be used for all connections and that the

device wires not be run in the same conduit with wiring used to supply inductive loads such as motors.

Disconnect the power supply before making any connections to prevent electrical shock or equipment

damage. Make all connections in accordance with national and local electrical codes.

The device power (24 Vac/dc) is connected to the terminal marked PWR. This terminal is used for the

positive dc voltage or the hot side of the ac voltage. The device is reverse voltage protected and as such

will not operate if connected backwards.

For voltage output signal types (3-wire) or for AC power supply operation (3-wire), the common of the

power supply is connected to the terminal marked COM. Note that this device has a half-wave type

power supply which means the power supply common is the same as the output signal common.

Therefore, several devices may be connected to one power supply and the output signals all share the

same signal common. Use caution when grounding the secondary of an ac transformer or when wiring

multiple devices to ensure that the circuit ground point is the same on all devices and the controller. This

terminal is not used for loop-powered 4-20 mA output type (2-wire).

The analog output signal is available on the OUT terminal. This signal is switch selectable for either a

voltage output or a standard loop-powered 4-20 mA output signal type. When voltage mode is selected,

either 0-5 Vdc or 0-10 Vdc can also be selected. These options are clearly indicated on the device circuit

board. The analog output signal is typically connected directly to the Building Automation System

(B.A.S.) and used as a control parameter or for logging purposes.

For voltage type output signal the device has a minimum load that it is able to drive, similarly for current

type output signal the device has a maximum load that it is able to drive with a particular power supply

voltage. Observe and follow these ratings in the Specication section or inaccurate reading may result.

The 4-20 mA output signal can easily be converted to a 1-5 Vdc signal for controllers accepting this type

of input. Simply insert a 250 ohm (0.1% is best) resistor between the “+” and “-”inputs of the controller.

This will convert the 4-20 mA signal to the desired 1-5 Vdc.

Figure 5 Wiring for output signals and 24 Vac/Vdc

power from controller

Analog Input

Common

24 Vdc/ac Power

Controller

OUT

COM

PWR

OUT

COM

PWR Controller

Power Supply

Input

Common

24 Vdc

OUT

COM

PWR Controller

Input

Common

24 Vac

OUT

COM

PWR Controller

Power Supply

Input

Common

24 Vdc

1: LO

MID

HIGH

+/-

5/10

2: ZERO 3: VOLT

24 Vac Power Supply, 4-20 mA Output

24 Vdc Power Supply, 0-5 Vdc Output 24 Vdc Power Supply, 4-20 mA Output

OUT

COM

PWR

LO HI

Page 3

CONFIGURATION

The transmitter is congured with switches located on the circuit board as shown on the PCB drawing.

These switches are used to select the output signal type and the input pressure range. The unit is factory

congured to operate in the 4-20 mA output mode. This can be changed to the voltage mode by moving

the switch from the position marked 4-20 mA to the position marked Voltage. Once the output mode

is changed to voltage, the output scale may be changed to either 0-5 Vdc or 0-10 Vdc. This is done by

moving the switch to the 5V or 10V position marked 5/10 on the ve position DIP switch. The pressure

range is set with a ve position DIP switch.

Switch Setting LP-00 LP-01 LP-02 LP-03 LP-04 LP-05

LOW 1" WC 3" WC 6" WC 10" WC 0.25" kPa 0.5 kPa

MID 2" WC 5" WC 10" WC 15" WC 0.5" WC 1 kPa

HIGH 4" WC 8" WC 12" WC 20" WC 1 kPa 2 kPa

For example, if the LOW range is selected on the LPS-00 model, the pressure range will be 0-1” wc. If the

4th DIP switch labeled (+/-) is also set to ON, then the pressure range will be –1 to +1” wc. This means

that each model has six pressure ranges. For the LPS-00 they will be 0-1, 0-2, 0-4, ± 1, ± 2 and ± 4 “wc. Set

LOW, MID or HIGH DIP switch to ON to select desired range. Note: If no range is selected LCD will display

"Err" indicating no range selected.

PNEUMATIC CONNECTIONS

The two pressure ports on the end of the enclosure are labeled High and Low. The output signal reads a

positive value when the port pressure is higher on the High port than the Low port so ensure these ports

are connected correctly. Use 0.170” I.D. exible tubing for the pressure connections. Arrange the tubing

to minimize stress on the connections and ensure there are no kinks in the tubing. For most accurate

measurements, do not leave the Low port open to the atmosphere, run a return line from the Low port

to the vicinity of the point being measured.

Ensure the tubing to be used is clean and do not allow material to fall into the pressure ports as

contamination could damage the sensor. When removing tubing use care to avoid breaking the ports. In

some cases it is better to cut the tubing o rather than pulling it o but be careful not to cut the tting or

an air leak may occur.

POWER UP INSTRUCTION

Before turning on the power, verify all wiring to ensure that it complies with one of the included wiring

diagrams and verify that the output signal type is correctly selected with the switches. Also, review the

specications to ensure the power supply is correct and that the pressure is within the correct range.

At this time, also inspect the internal pressure tubing that connects the sensor to the external ports to

ensure that the tubing did not get kinked during shipping or installation.

Proper operation can be veried by measuring the output signal. For voltage output conguration,

measure the voltage between the OUT and COM terminals. The voltmeter should read between 0-5

Vdc or 0-10 Vdc depending on the output range selected. For current output conguration, insert a mA

meter in series with the OUT terminal. The mA meter should read between 4 and 20 mA.

OPERATION

If the unit is set to a unipolar range such as 0-2” wc, then the pressure applied to the High port must be

higher than the pressure applied to the Low port. In this case, if the Low port is left open to ambient

pressure and the High port is used to measure a positive pressure, then the output pressure can be

calculated as follows:

4-20 mA Pressure = [(Output current - 4 mA) / 16 mA] x Range

0-5 Vdc Pressure = (Output voltage / 5 V) x Range

0-10 Vdc Pressure = (Output voltage / 10 V) x Range

In the case of 0-2” wc, 4 mA or 0 V = 0” wc and 20 mA or 5 V or 10 V = 2” wc. Since the transmitter is linear,

1” wc would be 12 mA or 2.5 V or 5 V. If the positive pressure connection is reversed then the transmitter

will always output 4 mA or 0 V.

If the unit is set to a bipolar range such as ± 2” wc, then the pressure applied to the High port should be

higher than the pressure applied to the Low port for a positive output response. In this case, dierential

pressure can be measured using both ports. If the High port has a positive pressure with respect to

the Low port, then the output indicates a positive pressure. Negative pressure is indicated if the High

pressure is less than the Low pressure. For bipolar ranges, the output pressure can be calculated as

Page 4

CALIBRATION

All pressure ranges are factory calibrated and no calibration is necessary. The user may adjust the zero

point if desired when changing ranges for example. Make sure the unit is warmed up for at least 10

minutes (1 hour is best) before making a zero adjustment. With both ports open to the ambient pressure,

press and hold the ZERO button for at least 3 seconds. Release the button after at least 3 seconds and

the device will calculate and store the new zero point.

Generally, it is not recommended that the 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. Contact the factory for information on this type of calibration.

SPECIFICATIONS

Pressure Ranges.............................±4", ±2", ±1", 0-4", 0-2", 0-1" WC

±8", ±5", 0-8", 0-5", 0-3" WC

±12", ±10", ±6", 0-12", 0-10", 0-6" WC

±20", ±15", ±10", 0-20", 0-15", 0-10" WC

±1000 Pa, ±500 Pa, ±250 Pa, 0-1000 Pa, 0-5000 Pa, 0-250 Pa

±2000 Pa, ±1000 Pa, ±500 Pa, 0-2000 Pa, 0-1000 Pa, 0-500 Pa

(6 per model, switch selectable)

Accuracy ...........................................±1% F.S. of selected range (minimum range is ±1.5 %F.S.)

@ 22°C (72°F) including hysteresis, non-linearity and repeatability

Measurement Type .......................Dierential (single port), Static, Velocity, & Total Pressure

Response Time ...............................250 ms

Stability .............................................<±0.5% F.S./year typical

Thermal Eects...............................<±3% over compensated range

Compensated Range....................0 to 50°C (32 to 122°F)

Proof Pressure.................................40" W.C. (100" for 10" & 20" models)

Burst Pressure .................................60" W.C. (200" for 10" & 20" models)

Operating Conditions ..................0 to 50°C (32 to 122°F), 5 to 95 %RH, non-condensing

Power Supply..................................20-28 Vac/dc (non-isolated half-wave rectied)

Supply Current ...............................<4 mA for voltage output, 20 mA max for current output

Input Voltage Eect......................Negligible over specied operating range

Protection Circuitry.......................Reverse voltage protected and output limited

Output Signal..................................4-20 mA (2-wire), 0-5 or 0-10 Vdc (3-wire), eld selectable

Output Drive @ 24 Vdc ................Current: 400Ω max

Voltage: 10KΩ min

Zero Adjustments..........................Push-button auto-zero

Wiring Connections......................Screw terminal block (14 to 22 AWG)

Pressure Connection ....................Barbed ports for 5 mm (0.170" ID) exible tubing

Conduit Connection.....................1/2" NPT conduit or cable gland

Display...............................................31/2" digit LCD, 0.4" digit height

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

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

Approvals .........................................CE, RoHS

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

follows:

4-20 mA Pressure = [(Output current - 4 mA) / 16 mA] x 2 x Range - Oset

0-5 Vdc Pressure = (Output voltage / 5 V) x 2 x Range - Oset

0-10 Vdc Pressure = (Output voltage / 10 V) x 2 x Range - Oset

In the case of ± 2” wc, 4 mA or 0 V = -2” wc and 20 mA or 5 V or 10 V = +2” wc. Since the transmitter is

linear, 0” wc would be 12 mA or 2.5 V or 5 V.

Page 5

DIMENSIONS

PRINTED IN CANADA

116.5 mm

4.58"

99.7 mm

3.93"

0.5" NPT

96.27 mm

3.79"

49.27 mm

1.94"

112.5 mm

4.43"

53.7 mm

2.11"

Table des matières

Autres manuels Greystone Energy Systems Transducteur

Greystone Energy Systems

Greystone Energy Systems UP Series Manuel utilisateur

Manuels Transducteur populaires d'autres marques

HBM

HBM AD101B Manuel utilisateur

Camille Bauer

Camille Bauer SINEAX F534 Manuel utilisateur

Trane

Trane KIT 16724 Instructions de montage

Lumel

Lumel P18 Manuel utilisateur

B&C Speakers

B&C Speakers DE75PTN Manuel utilisateur

MAMAC SYSTEMS

MAMAC SYSTEMS PR-243 Manuel

Mianyang Weibo Electronic

Mianyang Weibo Electronic WB Series Manuel utilisateur

ProMinent

ProMinent Dulcometer DMT Manuel utilisateur

MKS

MKS MicroPirani 925 Series Comment utiliser

WIKA

WIKA WU-20 Manuel utilisateur

Alcatel Vacuum Technology

Alcatel Vacuum Technology BARATRON 622A Manuel utilisateur

Camille Bauer

Camille Bauer SIRAX CH-5610 Manuel utilisateur

WIKA

WIKA F2802 Manuel utilisateur

Veris Industries

Veris Industries PW Series Manuel utilisateur

HBM

HBM TJ1-S6 Manuel utilisateur

Simrad

Simrad ES120-7C - REV D Guide de l'utilisateur

HBM

HBM C18 Manuel utilisateur

Airmar

Airmar M260 Mode d’emploi