HK Instruments AVT Series Manuale utente

Installaon version 6.0 2018

INSTALLATION

INSTRUCTIONS

AIR FLOW AND VELOCITY TRANSMITTERS

AVT Series

Thank you for choosing an HK Instruments AVT series air velocity

transmier. The AVT series is intended for use in commercial environ-

ments. It is designed with a duct mount probe and adjustable collar

suitable for round or rectangular ducts. The AVT series provides sepa-

rate readings for air velocity and temperature.

The AVT series comes with three measurement ranges in a single de-

vice (0–2 m/s, 0–10 m/s, 0–20 m/s). The AVT series is available with

oponal display and relay.

• READ THESE INSTRUCTIONS CAREFULLY BEFORE

ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS

DEVICE.

• Failure to observe safety informaon and comply with

instrucons can result in PERSONAL INJURY, DEATH AND/OR

PROPERTY DAMAGE.

• To avoid electrical shock or damage to equipment, disconnect

power before installing or servicing and use only wiring with

insulaon rated for full device operang voltage.

• To avoid potenal re and/or explosion do not use in potenally

ammable or explosive atmospheres.

• Retain these instrucons for future reference.

• This product, when installed, will be part of an engineered

system whose specicaons and performance characteriscs

are not designed or controlled by HK Instruments. Review

applicaons and naonal and local codes to assure that the

installaon will be funconal and safe. Use only experienced and

knowledgeable technicians to install this device.

Performance

Measurement ranges:

Velocity:

Range: 0–2 m/s

Range: 0–10 m/s

Range: 0–20 m/s

Temperature: 0−50 °C

Accuracy:

Velocity:

Range: 0...2 m/s: <0.2 m/s + 5 % from reading

Range: 0...10 m/s: <0.5 m/s + 5 % from reading

Range: 0...20 m/s: <1.0 m/s + 5 % from reading

Thermal shi: ±0.8 % FS / °C

Units calibrated at 22 °C. Rapid thermal shi

stabilisaon me 10 min.

Temperature: <0.5 ºC (velocity > 0.5 m/s)

Technical Specicaons

Media compability:

Dry air or non-aggressive gases

Measuring units:

m/s and °C

Measuring element:

Temperature: ntc10k

Velocity: Pt1000

Environment:

Operang temperature: 0...50 °C

Storage temperature: -20...70 °C

Humidity: 0 to 95 % rH, non-condensing

Physical

Dimensions:

Case : 90.0 x 95.0 x 36.0 mm

Probe: OD 10 mm, length 210 mm from boom of the

cover

Immersion Length with Flange: Adjustable 50–180 mm

Weight:

220 g

Mounng:

Mounng ange, ø 4.0 mm

Materials:

Case: ABS

Lid: PC

Probe: Stainless steel 304

Mounng ange: LLPDP

Protecon standard:

IP54

Display

3 1/2 digit LCD backlit display

Size: 45.7 x 12.7 mm

Electrical connecons:

Power supply & signal out: 4-screw terminal block

12–24 AWG (0.2–1.5 mm2)

Relay Out: 3-screw terminal block

12-24 AWG (0.2–1.5 mm2)

Cable entry:

M16

Electrical

Input: 24 VDC / 24 VAC ± 10 %

Current consumpon 35 mA (50 mA with relay)

+ 40 mA with mA-outs

Output signal 1: (T out)

0–10 V (linear to temperature)

L min 1 kΩ

4–20 mA (linear to temperature)

L max 400 Ω

Output signal 2: (v out)

0–10 V (linear to m/s)

L min 1 kΩ

4–20 mA (linear to m/s)

L max 400 Ω

Relay Out: 3-screw terminal block

(NC, COM, NO)

Potenal free SPDT

250 VAC, 6A / 30 VDC, 6 A adjustable switching point

and hysteresis

Conformance

Meets the requirements for CE marking:

EMC Direcve 2014/30/EU

RoHS Direcve 2011/65/EU

LVD Direcve 2014/35/EU

WEEE Direcve 2012/19/EU

SPECIFICATIONS

INTRODUCTION

AVT series devices are commonly used in HVAC/R systems for:

• in-duct air ow and velocity monitoring

• in-duct temperature monitoring

• VAV applicaons

APPLICATIONS

WARNING

RoHS 2

2011/65/EU

Installaon version 6.0 2018

SCHEMATICS

DIMENSIONAL DRAWINGS

1) Mount the device in the desired locaon (see step 1).

2) Open the lid and route the cable through the strain relief and

connect the wires to the terminal block (see step 2). Use a separate

strain relief for each cable.

3) The device is now ready for conguraon.

WARNING! Apply power only aer the device is properly wired.

Figure 1a - Mounng a ange

Figure 1b - Mounng the probe in a ange

AVT

71.5

m/s

°C

36.0

210.0

15.0

Push buon

Terminal block

Jumpers

Terminal block

for relay

Air ﬂow direcon Air ﬂow direcon

Air ﬂow direcon Air ﬂow direcon Air ﬂow direcon

Strain relief facing down

Figure 1c - Mounng orientaon

Tighten the

screw

INSTALLATION

1) Select the mounng locaon (on a duct).

2) Use the mounng ange of the device as a template and mark the

screw holes.

3) Mount the ange on the duct with screws (not included). (Figure 1a)

4) Adjust the probe to the desired depth. Ensure that the end of the

probe reaches the middle of the duct. (Figure 1b)

5) Tighten the screw on the ange to hold the probe in posion.

STEP 1: MOUNTING THE DEVICE

Installaon version 6.0 2018

Figure 2a - Wiring diagram: Tout & Vout

Figure 2b - Wiring diagram: relay output

For CE compliance a properly grounded shielding cable is

required.

1) Unscrew the strain relief and route the cable(s). Use the strain

relief on the le for power in and signal out (Tout/vout) and the

strain relief on the right for relay.

2) Connect the wires as shown in gure 2a and 2b.

3) Tighten the strain relief.

1) Select the desired measurement range (see step 3).

2) Select the desired measurement mode (see step 4).

3) Congure the relay (oponal) (see step 5).

The device is now ready to be used.

Congure the outputs:

• Temperature output (Tout)

• Velocity output (vout)

Select the output mode, current (mA) or voltage (V), by installing

jumpers as shown in Figure 4. Both outputs, temperature (T)

and velocity (v), are congured separately.

SELECTING THE MEASUREMENT RANGE CONTINUED

Tout

vout

24 V

GND

+Power supply

24 VDC / 24 VAC

V A VA

Output 0...10 V / 4...20 mA (temperature)

Output 0...10 V / 4...20 mA (velocity)

r d

No jumper

Circuit open

Jumper storedJumper installed

Cicuit closed

(Grey colour indicates that a jumper is installed)

Figure 3b - Jumper installaon

J1 Jumper (J1): Installed

J2 Jumper (J2): Not installed

Range 2 (0–2 m/s)

J1 Jumper (J1): Not installed

J2 Jumper (J2): Installed

Range 10 (0–10 m/s)

J1 Jumper (J1): Installed

J2 Jumper (J2): Installed

Range 20 (0–20 m/s)

Temperature output (Tout): T = voltage (V)

Velocity output (vout): v = voltage (V)

Temperature output (Tout): T = current (mA)

Velocity output (vout): v = current (mA)

Temperature output (Tout): T = voltage (V)

Velocity output (vout): v = current (mA)

V mA

Temperature output (Tout): T = current (mA)

Velocity output (vout): v = voltage (V)

V mA

COM

STEP 2: WIRING DIAGRAMS

Select the measurement range by installing jumpers as shown in

Figure 3a. (See Figure 3a-3b – Jumper sengs)

CONFIGURATION

STEP 3: SELECTING THE MEASUREMENT RANGE

STEP 4: SELECTING THE MEASUREMENT MODE

Figure 3a

Figure 4

Installaon version 6.0 2018

V mA

sw.p.

hyst.

Tout

vout

24 V

GND

Push button

1. Switching point (display required)

• Install a jumper to pins labeled sw.p. (switching point).

(See Figure 5)

• Press down on the pushbuon to select the switching point (e.g.

<5 m/s = NC) of the relay. The chosen value (m/s) is shown on the

display.

• Remove and store the jumper aer the conguraon is completed.

2. Hysteresis (display required)

• Install a jumper to pins labeled hyst. (hysteresis). (See Figure 5)

• Press down on the pushbuon to select the hysteresis of the relay

switching point. The chosen value (m/s) is shown on the display.

• Remove and store the jumper aer the conguraon is completed.

NOTE! Relay conguraon jumpers must be removed and stored for

proper operaon.

See the dimensional drawing above

Figure 5

The seller is obligated to provide a warranty of ve years for the deliv-

ered goods regarding material and manufacturing. The warranty period

is considered to start on the delivery date of the product. If a defect

in raw materials or a producon aw is found, the seller is obligated,

when the product is sent to the seller without delay or before expira-

on of the warranty, to amend the mistake at his/her discreon either

by repairing the defecve product or by delivering free of charge to

the buyer a new awless product and sending it to the buyer. Delivery

costs for the repair under warranty will be paid by the buyer and the

return costs by the seller. The warranty does not comprise damages

caused by accident, lightning, ood or other natural phenomenon, nor-

mal wear and tear, improper or careless handling, abnormal use, over-

loading, improper storage, incorrect care or reconstrucon, or changes

and installaon work not done by the seller. The selecon of materials

for devices prone to corrosion is the buyer’s responsibility, unless other-

wise is legally agreed upon. Should the manufacturer alter the structure

of the device, the seller is not obligated to make comparable changes

to devices already purchased. Appealing for warranty requires that the

buyer has correctly fullled his/her dues arisen from the delivery and

stated in the contract. The seller will give a new warranty for goods

that have been replaced or repaired within the warranty, however only

to the expiraon of the original product’s warranty me. The warranty

includes the repair of a defecve part or device, or if needed, a new part

or device, but not installaon or exchange costs. Under no circumstance

is the seller liable for damages compensaon for indirect damage.

RECYCLING/DISPOSAL

The parts le over from installaon should be

recycled according to your local instrucons.

Decommissioned devices should be taken to a

recycling site that specializes in electronic waste.

STEP 5: CONFIGURING THE RELAY RELAY MODEL ONLY WARRANTY POLICY

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