TSI/Alnor 8465-09, 8465-03, 8465-12, 8475-12, 8475-09 User manual

K

Air Velocity Transducer

Model 8455/8465/8475

Operation and Service Manual

1980239, Revision
July 2022

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ii

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Copyright
TSI Incorporated / 2002-2022 / All rights reserved.

LIMITATION OF WARRANTY AND LIABILITY (effective February 2015)

Seller warrants the goods, excluding software, sold hereunder, under normal use and service
as described in the operator's manual, to be free from defects in workmanship and material
for 24 months, or if less, the length of time specified in the operator's manual, from the date
of shipment to the customer. This warranty period is inclusive of any statutory warranty. This
limited warranty is subject to the following exclusions and exceptions:

a. Hot-wire or hot-film sensors used with research anemometers, and certain other

components when indicated in specifications, are warranted for 90 days from the date
of shipment;

b. Pumps are warranted for hours of operation as set forth in product or operator’s

manuals;

c. Parts repaired or replaced as a result of repair services are warranted to be free from

defects in workmanship and material, under normal use, for 90 days from the date of
shipment;

d. Seller does not provide any warranty on finished goods manufactured by others or on

any fuses, batteries or other consumable materials. Only the original manufacturer's
warranty applies;

e. This warranty does not cover calibration requirements, and seller warrants only that the

instrument or product is properly calibrated at the time of its manufacture. Instruments
returned for calibration are not covered by this warranty;

f. This warranty is VOID if the instrument is opened by anyone other than a factory

authorized service center with the one exception where requirements set forth in the
manual allow an operator to replace consumables or perform recommended cleaning;

g. This warranty is VOID if the product has been misused, neglected, subjected to

accidental or intentional damage, or is not properly installed, maintained, or cleaned
according to the requirements of the manual. Unless specifically authorized in a
separate writing by Seller, Seller makes no warranty with respect to, and shall have no
liability in connection with, goods which are incorporated into other products or
equipment, or which are modified by any person other than Seller.

The foregoing is IN LIEU OF all other warranties and is subject to the LIMITATIONS stated
herein. NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR

PARTICULAR PURPOSE OR MERCHANTABILITY IS MADE. WITH RESPECT TO

SELLER’S BREACH OF THE IMPLIED WARRANTY AGAINST INFRINGEMENT, SAID

WARRANTY IS LIMITED TO CLAIMS OF DIRECT INFRINGEMENT AND EXCLUDES

CLAIMS OF CONTRIBUTORY OR INDUCED INFRINGEMENTS. BUYER’S EXCLUSIVE

REMEDY SHALL BE THE RETURN OF THE PURCHASE PRICE DISCOUNTED FOR

REASONABLE WEAR AND TEAR OR AT SELLER’S OPTION REPLACEMENT OF THE

GOODS WITH NON-INFRINGING GOODS.

TO THE EXTENT PERMITTED BY LAW, THE EXCLUSIVE REMEDY OF THE USER OR
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OR, AT THE OPTION OF SELLER, THE REPAIR OR REPLACEMENT OF THE GOODS.
IN THE CASE OF SOFTWARE, SELLER WILL REPAIR OR REPLACE DEFECTIVE
SOFTWARE OR IF UNABLE TO DO SO, WILL REFUND THE PURCHASE PRICE OF
THE SOFTWARE. IN NO EVENT SHALL SELLER BE LIABLE FOR LOST PROFITS,

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BUSINESS INTERRUPTION, OR ANY SPECIAL, INDIRECT, CONSEQUENTIAL OR
INCIDENTAL DAMAGES. SELLER SHALL NOT BE RESPONSIBLE FOR INSTALLATION,

DISMANTLING OR REINSTALLATION COSTS OR CHARGES. No Action, regardless of
form, may be brought against Seller more than 12 months after a cause of action has
accrued. The goods returned under warranty to Seller's factory shall be at Buyer's risk of
loss, and will be returned, if at all, at Seller's risk of loss.

Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND
LIABILITY, which contains the complete and exclusive limited warranty of Seller. This
LIMITATION OF WARRANTY AND LIABILITY may not be amended, modified or its terms
waived, except by writing signed by an Officer of Seller.

Service Policy

Knowing that inoperative or defective instruments are as detrimental to TSI as they are
to our customers, our service policy is designed to give prompt attention to any
problems. If any malfunction is discovered, please contact your nearest sales office or

Trademarks

TSI and TSI logo are registered trademarks of TSI Incorporated in the United States
and may be protected under other country’s trademark registrations.

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1

Introduction

The TSI® air velocity transducer is a precision instrument designed to
measure air velocity in fixed installations or test applications. TSI

Transducers indicate velocity at standard conditions of 21.1°C (70°F)
and 101.4 kPa (14.7 psia). Each transducer must be setup in the field for the

desired velocity units, full-scale velocity, output signal and time constant.

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2

Parts Identification

Carefully unpack the instrument and accessories. Check the parts against
Figure 1. If any are missing or damaged notify your local distributor or TSI®
immediately.

8455/65/75

Transducer

-w

1980239

Manual

1309091

Probe mounting
clips

5000285

#6 Sheet Metal
Screws

5000286

#10 Sheet
Metal Screws

2919020

Compression
Fitting

2404624

Instruction
Labels

Figure 1/F

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3

Figure 2: Inside of Electronic Enclosure

1. Setup/Troubleshooting Display

5. Programming Instructions (foldout)

2. Push-Buttons (SET, , )

6. Compression Fitting (Power)

3. Terminal Block

7. Calibration Connector, Factory use

4. Mounting Holes

only

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4

Mounting the Transducer Electronics Enclosure

The electronics enclosure should be mounted to a secure surface.

W A R N I N G

DO NOT change the length of the transducer probe cable. Changing the
cable length will alter the performance and calibration of the Transducer.

5000285

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5

Mounting the Transducer Probe

The probe should be securely mounted before use. If mounted in a duct or
pipe the probe should be at least 7.5 duct diameters downstream and 3 duct
diameters upstream of anything that could cause flow turbulence. The
orientation dot on the probe should face upstream.

5000286
2919020

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6

Wiring the Transducer

Position the wires away from the SET -  -  push-buttons

Power
Requirements

11-30 VDC or 18-28 VAC 50/60 Hz, 350 mA

Recommended
Wire

18 gauge shielded cable. To avoid electrical
interference, connect shield to ground on transducer
and ground or minus(-) terminal on power supply.

Recommended
Transformer

24 VAC, 20 VA. Each transducer should have a
separate AC transformer to avoid shorting through
the ground circuit.

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7

Output Measuring
Device:

Use a fully differential input device (no ground
connection, plus (+) and minus (-) terminals are
independent), so the signal can float at the
measuring device. If fully differential input is not
available, current (mA) output should be selected.

Wiring for AC-Powered Operation

Wiring for DC-Powered Operation

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8

Setting Up the Transducer

1. Turn the transducer power supply on. The instrument will go through a
preprogrammed power-up sequence. The internal display will

sequence through the current settings: Calibration date “CALdAtE”,
“=“, month and year “03.2013”(March 2013), measurement units
“mEtErS”(m/s) or “FEET”(ft/min), “=“, selected output type and range
“0-5V” and the time constant “tc = 1.00” in seconds. The display will

then show velocity readings.

2. Push the SET button to enter setup mode. When setup mode is entered,
the transducer voltage/current output will drop below zero.

3. Use the  and  buttons to select the desired setting.

4. Use the SET button to advance to the next setup message.

N O T I C E

The output signal is disabled during the 15 second warm-up period and
when the transducer is in setup mode.

Setup Message

Available Settings

SELECt UnitS

FEEt (ft/min) or mEtErS (m/s)

SELECt FULL
SCALE

Select full scale of the velocity range

SELECt OUtPUt

Select Output Type: 0-5V, 0-10V, 1-5V, 2-10V, 4-20 mA,
0-20 mA

SELECt tc

Select Time Constant: 0.05 to 10 seconds
(see page 12)

AdJUSt ZErO

Adjusts voltage/current output signal at zero velocity
(see page 14)

AdJUSt SPAn

Adjusts the voltage/current output by ±15%
(see page 13)

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12

More Detail on the Time Constant

In order to make a fluctuating display easier to read, the output time constant
can be set between 0.05 and 10 seconds. The time constant is actually an
averaging period. The output is the average of readings taken over the last
time-constant period. Readings are taken 20 times per time constant period
for a time constant greater than one second and 20 times per second for a
time constants of one second or less.

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13

More Detail on Span Adjustment

A span factor can be entered to adjust the output signal up or down by
fifteen percent. While the span factor is shown on the display, the
transducer will measure velocity and output the appropriate voltage or
current for that velocity. (The time constant will not be active). By changing

the span factor, the transducer’s output signal can be adjusted up or down

by up to fifteen percent.

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14

More Detail on Adjusting Output Signal at Zero Velocity

In certain cases, the remote display will not read the same as the transducer
display output at zero velocity. To correct this discrepancy you will need to
adjust the output signal at zero velocity. Put the transducer into setup mode
and sequence through the setup messages until “AdJUSt ZErO” is shown on
the display. The transducer then displays and outputs the voltage or current
that has been set as the zero value. Adjust the transducer output voltage or
current using the  and  pushbuttons. Adjust the output signal until the
remote device displays the expected zero. The transducer displays the
voltage or current that corresponds to the factory calibration. The velocity
readings should now be the same on both the setup/troubleshooting display
and the remote display.

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18

Troubleshooting

Symptom

Possible Problem & Solutions

No output or low output

Incorrect input voltage

Sensor positioned incorrectly

Sensor not extended beyond protective shield

Wrong output type/range selected

Loose power or signal connections

Incorrect full scale velocity range selected

Displayed velocity is
hard to read

Internal display is for setup/troubleshooting
only

Accuracy of velocity
reading suspect

Dirty sensor, check for dirt or dust buildup.

Erratic readings

Turbulent flow, check positioning of sensor,
increase time constant to dampen reading.

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20

Cleaning the Sensor

Dust and dirt may build up on the sensor. If necessary, carefully clean the
sensor using a soft bristle brush dipped in a mild solvent like alcohol.

Recalibration

To maintain a high degree of accuracy in your velocity measurements, TSI®
recommends that you have your instrument recalibrated annually.

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21

Specifications

Models 8455, 8465, 8475

8455

8465

8475

Accuracy ...........................

±2.0% of reading1

±2.0% of reading1

±3.0% of reading2

±0.5% of full scale
of selected range

±0.5% of selected
full scale range

±1.0% of selected
full scale range

Repeatability ....................

<±1.0% of
reading3

<±1.0% of
reading3

NA
Response Time to Flow ...

0.2 sec4

0.2 sec4

5 sec5

Common specifications to all models
Field Selectable Velocity Ranges

Model 8455/8465 ........... 0.125 m/s to 1.0, 1.25, 1.50, 2.0, 2.5, 3.0, 4.0, 5.0, 7.5, 10.0,

12.5, 15.0, 20.0, 25.0, 30.0, 40.0, 50.0 m/s (25 ft/min to 200,
250, 300, 400, 500, 750, 1000, 1250, 1500, 2000, 2500,
3000, 4000, 5000, 7500, 10000 ft/min)

Model 8475 .................... 0.05 m/s to 0.5, 0.75, 1.00, 1.25, 1.50, 2.0, 2.5 m/s

(10 ft/min to 100, 125, 150, 200, 250, 300, 400, 500 ft/min)

Minimum Resolution .... 0.07% of selected full scale

Input Power ................... 11-30 VDC or 18-28 VAC, 350 mA max6

Output Impedance ........ Voltage mode: less than 1 ohm, 20 mA max source current

Output Resistance ........ Current mode: 500 ohms maximum load resistance

Output Signal

(field selectable) .......... 0-5V, 0-10V, 1-5V, 2-10V, 0-20 mA, 4-20 mA

Output Time
Constant (field

selectable) ................... 0.05 to 10 seconds.

Probe Length ................. 7.5 cm, 15 cm, 21.5 cm or 30 cm (3 in, 6 in, 9 in or 12 in)

Temperature .................. Compensation Range: 0 to 60°C (32 to 140°F)

Sensor Operation: 0 to 93°C (32 to 200°F)
Electronics Operation: 0 to 93°C (32 to 200°F)
Storage: 0 to 93°C (32 to 200°F)

1

from 18 to 28°C (64.4 to 82.4°F), outside this range add 0.2% per °C (0.11% per °F),

within temperature compensation range.

2

from 20 to 26°C (68 to 78.8°F), outside this range add 0.5% per °C (0.28% per °F),

within temperature compensation range. Uncertainty increases in downward vertical
flow at velocities less than 0.25 m/s (50 ft/min). Directional sensitivity of the Model
8475 is +5%/-20% of reading +0/-0.05 m/s (+0/-10 ft/min) over 270° solid angle
regardless of flow direction.

3

Standard deviation based on one minute average from 0.5 to 5.0 m/s (100 to 1000

ft/min).

4

For 63% of final value, tested at 7.5 m/s (1000 ft/min).

5

For 63% of final value, tested at 2.5 m/s (500 ft/min).

6

Input voltage must be maintained within specifications at the transducer.

Calibration occurs with sensor oriented horizontally in a horizontal air flow.

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