TSI Instruments Alnor Velometer 6000 Series Operation manual

VELOMETER®ANEMOMETER
SERIES 6000
OPERATION AND SERVICE MANUAL
P/N 116-008-020, REV 19
SEPTEMBER 2014

iii
LIMITATION OF WARRANTY AND LIABILITY
Copyright: ©TSI Incorporated / 2008-2014 / All rights reserved
Address: TSI Incorporated / 500 Cardigan Road / Shoreview, MN 55126 / USA
Fax No.: 651-490-3824
E-mail Address: [email protected]
Limitation of Warranty and Liability (effective April 2014):
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 12 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.
h. 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
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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 BUYER, AND THE LIMIT OF
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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
representative, or call TSI’s Customer Service department at 1-800-874-2811 (USA) or [phone].

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VELOMETER®SERIES 6000
SECTION 1: ENGLISH......................................................................1
SECTION II: SPANISH....................................................................21
SECTION III: FRENCH.....................................................................43

vii
TABLE OF CONTENTS
Using the Velometer®Anemometer Safely ..........................1
General Description...............................................................2
Meter....................................................................................2
Range Selector ....................................................................3
Pitot Probe ...........................................................................4
Low Flow Probe ...................................................................4
Diffuser Probe ......................................................................5
Static Pressure Probe ..........................................................5
Preparation for Use................................................................6
Diffuser Probe ......................................................................6
Static Pressure Probe ..........................................................7
Pitot Probe ...........................................................................8
Low Flow Probe ...................................................................8
Operation ...............................................................................9
Procedure for Measuring Velocity
with Low Flow Probe............................................................9
Velocities at Suction Openings—Except
Diffusers or Grilles................................................................9
At Grinding or Buffing Wheels.........................................9
At Spray Booths ..............................................................9
Velocities at Plating Tanks..............................................9
Procedure for Measuring Diffuser, Register and Grille
Velocities with Diffuser Probe ............................................10
Typical Diffuser Air Flow Measuring Procedure.................10
Procedure for Measuring Static Pressure ..........................12
Procedure for Air Flow Measurement in Ducts...................12
Determining Cross-Section Areas.................................13
Measuring Duct Velocity................................................13
Troubleshooting and Maintenance.....................................14
Troubleshooting Guide ......................................................14
Maintenance.......................................................................16
General..........................................................................16
Cleaning of the Velometer.............................................16
Replacement Parts and Accessories ............................16
Replacement of the Range Selector Filter ....................16
Replacement of O-Rings in Probes...............................17
Replacement of O-Rings on the Meter..........................17
Calibration.....................................................................17
Appendix A: Temperature and Pressure Corrections ......18
Instructions for Return...................................................................19

1
USING THE VELOMETER®
ANEMOMETER SAFELY
All necessary precautions must be observed when operating the
Velometer®Anemometer in the vicinity of moving equipment such as
motors and blowers. You must exercise care to ensure that the probe or
the instrument does not interfere with any moving equipment.
The maximum temperature at which the Velometer®Anemometer can be
used is 250°F (120°C). The maximum pressure difference between the
inside of the instrument housing and ambient is 4.2 psi. (8.6 gm/cm2).
The Velometer®Anemometer is not designed for gas mixtures other
than air.
Any use beyond the operational temperature or pressure limits, or on
gasses which are either combustible or may deteriorate materials in the
Velometer®Anemometer, is not recommended.
Note: Opening or otherwise attempting to service your TSI instrument
will void the warranty. Please read the warranty statement carefully.

2
GENERAL DESCRIPTION
The Alnor®Velometer®Anemometer is a direct reading instrument for
measuring air velocities. It is designed to measure velocities inside
heating and ventilating ducts, or in open areas such as at fume hoods,
grilles, diffusers, slots on ventilated plating tanks, and so forth. It may
also be used for measuring duct static pressures.
The Velometer®Anemometer set consists of the meter, velocity and
static pressure Range Selectors, measuring probes and connecting
hoses.
The Velometer®Anemometer is basically an air flow meter reading in
feet per minute (or meters per second).
The Velometer®Anemometer is built with a taut band meter movement; it
is carefully balanced so that you may hold the meter in any normal
position and still get an accurate reading. All Velometer®Anemometers
are uniformly calibrated to factory standards: optimum accuracy is
attained when velometers are used with accessories of the same set,
and with the meter in the horizontal position (scale window facing up).
Before using the Velometer®Anemometer, study the operational
instructions and procedures to ensure proper use of the instrument for
accurate results.
Meter
The meter receives air through its sensing ports. A force against the
vane causes a deflection of the needle which yields an indicated reading.
On the face of the meter there is a series of range scales (A) which
enables you to read accurately the measured value. Since there are a
number of ranges, it is important that the scale read on the meter face
corresponds to the velocity or static pressure range that is set on the
Range Selector.
On the back side of the meter there are two sensing ports (hose
connections) (B) which are for interconnecting to one of the two Range
Selectors with hoses. One port is marked positive (+) and the other
negative (–).
Sensing port caps are provided and you should place them over the
sensing ports when the meter is not in use.
Check to see that the pointer is at zero each time the meter is put into
service. The zero adjustment screw (C) enables you to make an
adjustment. With the caps still on the ports, use a screwdriver to bring
the pointer to zero. It should continue to read zero whether the meter is
lying flat, standing upright or is at any position in between, including the
position where one end of the scale is lower than the other.
A Range
Scales
C Zero
Adjustment
Screw
B Sensing
Ports

3
Range Selector
The Range Selector (A)allows you to switch to one of two velocity
ranges or a static pressure range by means of a switch plate (B).
A switch button (C) is provided for changing the Velometer®Anemometer
from use with a Pitot Probe to use with either a Diffuser Probe or a Static
Pressure Probe.
When using the Pitot Probe, turn this button and allow it to spring out;
when using either the Diffuser Probe or a Static Pressure Probe, push
the button in and turn to lock it in position. In this position the switch
button slot must be vertical (aligned with arrows on label) for proper
instrument operation.
Do not block switch button during operation.
The plug-in port (D) accepts the various probes and allows you to rotate
them 360. (+) and (–) ports (E) are for hose connections to the meter.
Your set will include two Range Selectors that are identified by red or
black lettering. This color coding relates to the same colored scales on
the meter.
DPlug-in Port
BSwitch Plate
FTake-up
Adjustment
Screw
ARange
Selector
CSwitch Button
EPort Connections

4
The Range Selector with the black lettering has the following ranges:
Velocity: 0 to 1250 fpm (0–6 m/s)
0 to 2500 fpm (0–12 m/s)
Static Pressure: 0 to 1 in H2O (0–20 mm H2O)
The Range Selector with red lettering has the following ranges:
Velocity: 0 to 5000 fpm (0–22.5 m/s)
0 to 10,000 fpm (0–45 m/s)
Static Pressure: 0 to 10 in H2O (0–200 mm H2O)
A take-up adjustment screw (F) is provided for tightening the switch plate
(B) which may work loose through normal wear. A noticeable effort to
change the setting of the switch plate will indicate proper tightness.
Pitot Probe
The Pitot Probe is designed to measure the velocity of air in ducts and
also in unrestricted areas such as air intakes at grinding/buffing wheels
or ventilation slots at plating tanks. For the procedure to measure duct
velocities see pages 13 and 14; for other applications see page 10.
The air intake (and discharge) for the probe is at (A). The probe should
be held at right angles to the air flow; an arrow at the base of the probe
(C) should point in the direction of the air flow.
The probe is marked in one-inch increments (B) for convenience in
positioning the probe inside ducts.
The probe collar (D) acts as a stop when inserting the probe into the
Range Selector; an O-ring acts as a seal when the connecting leg (E) is
inserted into the Range Selector.
Low Flow Probe
The Low Flow Probe is designed for measuring velocities below 300 feet
per minute in open spaces; it attaches directly to the meter without
hoses.
An arrow (A) on the probe serves as a reminder of the direction you
must orient the probe and the meter when taking measurements.
Refer to page 10 for the proper velocity measuring procedure.
EConnecting
Leg
D Probe Collar
CAir Flow
Direction
Indicator
BScale
AVelocity
Sensing Port
AAir Flow Direction Indicator

5
Diffuser Probe
The Diffuser Probe is designed to measure the velocity at diffusers,
registers and grilles. The volume of air being supplied or exhausted can
be determined by multiplying the measured velocity times an air flow
factor.* Refer to page 11 for proper diffuser, register and grille measuring
procedures.
The velocity sensing port (A) senses the velocity at the diffuser, register,
or grille.
The snap-off fins (B) allow you to accurately position the probe vertically,
horizontally or radially.
The probe collar (C) acts as a stop when connecting the probe to the
Range Selector, and the O-ring acts as a seal.
The connecting leg (D) is inserted into the Range Selector.
*Air flow factors, sometimes known as “K” factors, are generally available from the
manufacturer of the grille or diffuser.
Static Pressure Probe
The Static Pressure Probe is designed for measuring duct static
pressure.
The rubber cap (A) provides a seal around the ¼" hole (in the duct)
where measurements are to be taken.
The probe collar (B) acts as a stop when connecting the probe to the
Range Selector; the O-ring acts as a seal.
The connecting leg (C) is inserted into the Range Selector.
Refer to page 8 for the proper static pressure measuring procedure.
AVelocity
Sensing
Port
BSnap Off
Fins
CProbe Collar
DConnecting
Leg
ARubber Cap
BProbe Collar
CConnecting
Leg

6
PREPARATION FOR USE
Diffuser Probe
Step 1: Remove sensing port caps.
Step 2: Connect two hoses (C) to sensing ports (B).
Step 3: Select proper Range Selector (D).
Note: For velocities below 2500 feet per minute, use the Range Selector
with black letters; for velocities above 2500 feet per minute, use the
Range Selector with red letters.
Step 4: Connect Range Selector (D) to loose ends of hoses (C) that are
already connected to the meter (A) as follows:
For Supply Measurements
Connect the plus (+) sensing port of the meter to the plus (+) sensing
port of the Range Selector, and the minus (–) sensing port of the
meter to the minus (–) sensing port of the Range Selector.
For Return and Exhaust Measurements
Connect the plus (+) sensing port of the meter to the minus (–)
sensing port of the Range Selector, and the minus (–) sensing port
of the meter to the plus (+) sensing port of the Range Selector.
Step 5: Insert Diffuser Probe (E) into the Range Selector (D). Push the
Diffuser Probe firmly down until the collar of the probe rests against the
top of the Range Selector.
Step 6: Check position of switch button (Da) on Range Selector (D). It
must be pushed in and turned to latch it in.
Step 7: Check position of switch plate (Db) on Range Selector (D). It
must be positioned for the proper velocity range.
Step 8: Proceed to make necessary velocity measurements; see page
11 for procedures.
EDiffuser
Probe
DRange
Selector
Da Switch
Button
Db Switch
Plate
CHose
BSensing
Ports
AMeter

7
Static Pressure Probe
Step 1: Remove sensing port caps.
Step 2: Connect two hoses (C) to sensing ports (D).
Step 3: Select proper Range Selector (D).
Note: For 0–1" static pressures, use Range Selector with black letters;
for 1–10" static pressures, use Range Selector with red letters.
Step 4: Connect the hoses to the Range Selector (D) as follows:
For Positive Pressure Measurements
Connect the plus (+) sensing port of the meter to the plus (+) sensing
port of the Range Selector. Connect the minus (–) sensing port of
the meter to the minus (–) sensing port of the Range Selector.
For Negative Pressure Measurements
Connect the plus (+) sensing port of the meter to the (–) sensing port
of the Range Selector. Connect the minus (–) sensing port of the
meter to the plus (+) sensing port of the Range Selector.
Step 5: Select the proper Static Pressure Probe (E)
Note: For 0–1" static pressures, use the Static Pressure Probe with
black letters. For 1–10" static pressures, use the Static Pressure Probe
with red letters.
Step 6: Insert the Static Pressure Probe (E) into the Range Selector
(D). Push the probe firmly down until the collar of the probe rests against
the top of the Range Selector.
Step 7: Check position of switch button (Da) on the Range Selector (D).
It must be pushed in and turned to lock it in position.
Step 8: Check position of switch plate (Db) on the Range Selector (D).
It must be to the extreme left.
Step 9: Proceed to make duct static pressure measurements. See page
13 for proper procedure.
DRange
Selector
Da Switch
Button
Db Switch
Plate
CHose
BSensing
Ports
AMeter
EStatic
Pressure
Probe

8
Pitot Probe
Step 1: Remove sensing port caps.
Step 2: Connect two hoses (C) to sensing ports (B).
Step 3: Select proper Range Selector (D).
Note: For velocities below 2500 feet per minute, use the Range Selector
with black letters; for velocities above 2500 feet per minute, use the
Range Selector with red letters.
Step 4: Connect the hoses to the Range Selector (D) as follows: The
plus (+) sensing port of the meter to the plus (+) sensing port of the
Range Selector and the minus (–) sensing port of the meter to the minus
(–) sensing port of the Range Selector.
Step 5: Insert the Pitot Probe (E) into the Range Selector (D). Push the
Pitot Probe firmly down until the collar of the probe rests against the top
of the Range Selector.
Step 6: Check position of switch button (Da) on Range Selector (D). It
must be released and left in the out position.
Step 7: Check position of switch plate (Db) on Range Selector (D). It
must be positioned for the proper velocity range.
Step 8: Proceed to make necessary duct velocity measurements. See
page 13 for proper procedures.
Low Flow Probe
Step 1: Remove sensing port caps.
Step 2: Connect the Low Flow Probe (F)
directly to the meter (A) by placing it onto
the sensing ports (B); no hoses are
required. It fits only one way onto the
meter, with the arrow pointing to the left
when viewing the meter from the front.
DRange
Selector
Da Switch
Button
Db Switch
Plate
CHose
EPitot Probe
B
Sensing
Ports
Meter
A
Low Flow Probe F

9
OPERATION
After assembling the correct probe to the Velometer®Anemometer as
shown on pages 7–9 you are ready to take the necessary
measurements. Below are some typical applications and cautions when
using the various probes. When using the Velometer®Anemometer for
measuring air velocity at conditions other than .075 lbm/ft3refer to the
correction chart on page 19 for maximum accuracy.
Procedure for Measuring Velocity with Low Flow Probe
1. Place the meter where you wish to measure the air flow. If you are
holding it, keep it at arm’s length and stand so you do not obstruct
the flow of air past the meter.
2. Hold the meter so that the arrow on the probe points in the direction
of air flow; if the direction is not known, turn the meter until you
observe the maximum pointer deflection.
3. Read the air velocity on the 0 to 300 FPM scale.
4. Record the reading on an appropriate air balancing worksheet.
Velocities at Suction Openings—Except Diffusers or
Grilles
At Grinding or Buffing Wheels:
When measuring velocities at grinding or buffing wheels, use the
Pitot Probe or the Low Flow Probe. The head of the probe should be
held in a plane defined by the outside edge of the hood.
At Spray Booths:
When measuring the velocity at spray booths, use the Low Flow
Probe. The head of the probe should be placed in a plane defined by
the outside edge of the spray booth.
Velocities at Plating Tanks:
To measure the velocity at plating tanks, use the Pitot Probe. The
probe should be held close to the exhaust port of the tank, with the
arrow on the probe pointing toward the exhaust port.

10
Procedure for Measuring Diffuser, Register and Grille
Velocities with Diffuser Probe
To calculate the air volume passing through a diffuser, register or grille
outlet, measure the velocity at the outlet, applying the air flow factor that
is provided by the outlet manufacturer, and use the following equation:
Q = K x V
Where English Units Metric Units
Q = Volume flow rate ft3/min m3/s
K = Manufacturer’s flow factor ——
V = Average measured velocity ft/min m/s
Instructions for positioning the Diffuser Probe at the outlet for measuring
the velocity, as well as an appropriate flow factor, are available from the
outlet manufacturer. Shown below is a typical example:
Typical Diffuser Air Flow Measuring Procedure
To determine the volume of air discharged, a Velometer®Anemometer
with a Diffuser Probe may be used as shown below.
Note that the bottom of the positioning fins on the probe are level with
(and touching) the bottom of the intermediate spinning of the diffuser.
The probe is held vertically. The flow factors shown in the accompanying
table are applied to an average of six velocity readings taken at equally
spaced positions around the periphery of the diffuser.
Diffuser
Size
Air Flow
Factor
10
0.42
12
0.66
14
0.9
17
1.3
20
1.8
24
2.8
32
4.9
40
7.7

11
For maximum accuracy, observe the following precautions:
1. Use only the appropriate diffuser, register or grille manufacturer’s
measuring procedures.
2. Make a complete and accurate velocity reading.
3. Record the velocity measurements on a diffuser air balancing
worksheet as shown.
4. When the procedures instruct you to apply an average velocity
reading, divide the opening into a number of equal areas and
determine an average of single readings taken at the center of the
equal areas.
5. When making a record of the measurements, include room location,
outlet model, flow factor, design air volume if known, measured
outlet velocity and calculated air volume.
AIR BALANCING—DIFFUSER READINGS

12
Procedure for Measuring Static Pressure
1. Select the location for the static pressure reading and drill a ¼" hole.
You may wish to paint a circle around the hole and number it for
future convenience.
2. Assemble the Velometer®Anemometer for positive (or negative)
readings as described above.
3. Place the rubber cup of the probe firmly over the hole, and read the
static pressure on the black or red “Inches of Water Gauge” scale.
4. Record the reading on an appropriate air balancing worksheet.
Procedure for Air Flow Measurement in Ducts
To calculate the air volume passing through a duct, measure the
average velocity inside the duct, determine the cross-sectional area of
the duct, and apply the following equation:
Q = A x V
Where English Units Metric Units
Q = Volume flow rate ft3/min m3/s
A = Cross-section area ft2m2
V = Average duct velocity ft/min m/s