Alnor AXD 530 User manual

®
A TSI Company
®
OWNER’S MANUAL
AXD 530
MicroManometer

1
Table of Contents
Features 2
Using the AXD530 Safely 3
Getting Started 4
Installing Batteries 4
Preparing the Instrument 4
Attaching the Optional Pitot-Static Probe 4
Start-Up Sequence 5
Zeroing the Instrument 5
The Display 7
Modes 7
AXD530 Keypad 8
The AXD530 Keypad 8
Key Functions 8
Using the AXD530 9
Basic Functions 9
To Change Units 9
Measurement Modes 9
Pressure Selection 9
Velocity Selection 10
Maintenance & Troubleshooting 11
Repair Information 13
Instructions for Return 14
Ownership/Calibration Log 16

2
Features
The AXD530 MicroManometer is a meter that
measures differential pressure. It is also capable of
measuring and displaying air velocity.
Functions are selected through a 3-key pad.
The AXD530 displays measurement results on a
liquid-crystal display (LCD), with additional dis-
play segments for units of measure and low battery
indication.
It features two built-in pressure ports for attachment
to the pressure source you will measure. Optional
hoses and Pitot-static probes are available.
The AXD530 uses three (3) AA size alkaline bat-
teries for low replacement cost.

3
Using the AXD530 Safely
• When using the instrument to check air
flow in an elevated workplace, make
certain that you can safely raise and
hold the instrument while making mea-
surements. This is especially important
when you are working on a ladder.
• Avoid catching hoses or attachments in
moving machinery.
• Use the instrument only for measure-
ments using air.
• Avoid any corrosive or other danger-
ous or explosive gas mixtures.
Please dispose of used batteries in a
responsible manner.
NOTICE
WARNING
!

4
Getting Started
Installing Batteries
The AXD530 uses three (3) AA size non-recharge-
able batteries. The unit was shipped with batteries
not installed. You will find the batteries in the in-
strument package.
To install the batteries:
• Loosen the battery cover screw on the
rear of the instrument.
• Slide the cover up and lift it out.
• Install the batteries over the pull strap,
taking care to observe each battery’s
polarity.
• Replace the cover and tighten the
screws.
Note: When the batteries become low, the LCD will
show [LO BATT] above the reading. From that
point, you will have about one hour of normal use
left. If []comes on continuously and
replaces the reading, the battery voltage is too low
for accurate measurements and the meter will turn
itself off.
Always keep a replacement set of new batteries
available.
Preparing the Instrument
Attach hoses to the pressure ports at the top of the
instrument. Do not exceed maximum pressure.
Attaching the Optional
Pitot-Static Probe
To attach the probe for measuring air velocity:
• Remove the Pitot-static probe and rub-
ber tubing from their carrying case.
• Remove the protective caps from the
probe and save them for re-storing the
probe later.
Back view of instrument
Low battery displays
LO BATT

5
• Attach one section of flexible tubing to
the probe’s static pressure port, and
another to the probe’s total pressure
port.
• Identify the (+) and (-) pressure ports
at the top of the AXD530.
• Attach the tubing from the total pres-
sure port of the Pitot-static probe to the
(+) port of the MicroManometer.
• Attach the tubing from the static pres-
sure port of the Pitot-static probe to the
(-) port of the MicroManometer.
• Check to ensure that all tubing connec-
tions are tight.
Start-Up Sequence
Each time you turn the instrument on, some basic
functions are tested. The following will occur:
• All the LCD segments will turn on.
• The current software revision level will
be displayed.
• The message [ ] will appear.
• The last unit of measurement will be
displayed along with a measurement
value.
•[ ] followed by [ ]
will appear.
• The meter will begin to measure.
Zeroing the Instrument
Before you begin taking measurements, the AXD530
must be zeroed by following these steps:
• Most hand-held meters using differen-
tial pressure sensors require a warm-up
time. Turn on your Alnor AXD530 a
minimum of 5 minutes before zeroing
and taking your first measurements.
Pitot-static probe
TOTAL PRESSURE HOLE
STATIC PRESSURE HOLES
STATIC PRESSURE PORT
(TO - INPUT ON MANOMETER)
TOTAL PRESSURE PORT
(TO + INPUT ON MANOMETER)

6
• Make sure there is no air flow past a
Pitot-static probe (also verify that none
of the tubing is pressurized by acciden-
tal squeezing).
• Press the ZERO key until [ ]
appears on the display.
The instrument will automatically zero its readings.
Repeat this procedure if necessary, because at high
resolutions the AXD530 will read small pressure
changes.

7
The Display
The AXD530 uses a 4-digit, 7-segment LCD. As a
result, measurements exceeding 9,999 of a given unit
of measure will be displayed in a scientific notation
format of XXEY. The actual reading will be rounded
to the nearest thousand, XX. The Y indicates the
number of zeros after XX. For example, 12,664 is
displayed as [ ].
Modes
The AXD530 operates and takes measurements in
the RUN mode. You may be in the RUN, ZERO, or
UNIT select modes.

8
ON
OFF ZERO UNIT
AXD530 Keypad
The AXD530 Keypad
The internal clock rate of the AXD530 software
may cause the meter to react slowly to a key push.
The reaction time of a key push will vary with
different functions (1–3 seconds). Maintain pressure
on the desired key until you see the required response
on the display.
Key Functions:
ON/OFF This key is used to turn the instrument
on or off.
ZERO The AXD530 will zero the instrument
any time this key is pushed. To get a
proper zero, make sure no pressure
difference is applied across the ports
and no kinks are in the hoses.
(See also Zeroing the Instrument)
UNIT This key is used to select the desired
unit of measurement.
ON
OFF ZERO UNIT
ON
OFF ZERO UNIT

9
Pa inH
2
0m/s fpm
Using the AXD530
Basic Functions
To Change Units:
• Push and hold the UNIT key.
• The display annunciator ▲will move
to the left of the LCD beginning from
the right.
• Release the UNIT key at the desired
location.
For example: To change the units of measurement
from feet per minute (fpm) to meters per second
(m/s):
• Push the UNIT key.
• The display annunciator ▲ moves to
m/s, selecting meters per seconds.
• Release the key.
Measurement Modes
You can set the AXD530 for pressure or velocity
measurement by pressing the UNIT key.
Pressure Selection:
The AXD530 is a pressure measuring instrument.
Its factory default setting is to measure pressure in
inches of water (in.H2O) or pascals (Pa).
Display with annunciator
and units of measure.

10
Velocity Selection:
Air velocity measurement can be accomplished
using a Pitot-static probe.
The following equations are used for pressure to
velocity conversions:
Velocity (fpm) = 4005 √Pressure
where Pressure is in inches H20
or
Velocity (m/s) = 1.29 √Pressure
where Pressure is in Pa
The velocity calculations assume standard condi-
tions.UseAppendixDtodeterminethecorrectmulti-
plier if conditions other than standard exist. Refer
to Appendix B for pressure to velocity conversion.

11
Maintenance &
Troubleshooting
Maintenance
Periodic maintenance should be performed on the
meter.
• Batteries should be replaced when the
low battery indication is on or when the
unit turns itself off after power-up.
• Batteries should be removed from the
meter if it will not be used for two (2)
months or longer.
• Calibration checks are recommended
every 12 months.
• Keep the meter clean by using a mild
detergent on its case. DO NOT use
abrasives or solvents. Also, DO NOT
allow liquids to enter the meter’s case.
Dry thoroughly after cleaning.
• Use an eyeglass cleaner and lens paper
to clean the LCD window.

12
If any of these problems persist, call the factory for
assistance.
Troubleshooting
Symptom Check
DISPLAY SHOWS [ ] The measured value is beyond the instrument’s
range. Be sure there is no applied pressure, then
press ZERO.
DISPLAY SHOWS The internal connection between the meter and
[] the sensor is faulty. Turn the meter off,
then turn it back on again.
DISPLAY DOES Press the ON/OFF key until the unit turns off.
NOT CHANGE Then turn it on and try again.
Your input might simply be very stable. Test your
meter by pinching the hoses.
METER TURNS OFF The batteries are too low for your completing
start-up meter start. Watch for the [ ] cycle
indication just before the meter turns off, then re-
place the batteries.
The input is not steady.
Check to see that your Pitot-static probe is held
steady.
ERRONEOUS READINGS Make sure that your Pitot-static probe is perpen-
dicular to the air flow you are measuring.
Clean your Pitot-static probe—it may be dirty.
Take measurements at a different location.
MEASUREMENT
IS ERRATIC

13
Repair Information
Contact the distributor in your country, or Alnor
Instrument Company directly, before returning your
instrument. See INSTRUCTIONS FOR RETURN.
Follow the procedure carefully as it will expedite
processing. Failure to follow the procedure may
cause return of the unit unrepaired. Send your
instrument to the factory transportation prepaid. To
assure fast turn-around time, photocopy and fill out
this form with as much detail as possible and attach
it to the instrument.
Instrument Model______________________________________________________
Serial Number ________________________________________________________
Date of Purchase ______________________________________________________
Where Purchased ______________________________________________________
Describe Malfunction __________________________________________________
Describe Environment __________________________________________________
Return Instrument to:
Name _______________________________________________________________
(Your name or company)
Address______________________________________________________________
Telephone ____________________________________________________________
Address Correspondence to:
Name _______________________________________________________________
Address______________________________________________________________
Telephone ____________________________________________________________

14
Instructions for Return
Damaged in Transit
All shipments are carefully examined by Alnor Qual-
ity Assurance and carefully packed for shipment. On
receipt, if the shipping container appears to have
been damaged during shipment, the instrument
should be thoroughly inspected. The delivering
carrier’s papers should be signed noting the appar-
ent damage.
If the instrument itself has been damaged, a claim
should be promptly filed against the carrier by the
customer. The selling agent will assist the customer
by supplying all pertinent shipping information;
however, the claim must be filed by the insured.
If the instrument is damaged beyond use, a new order
should be placed with Alnor while awaiting reim-
bursement from the carrier for the damaged instru-
ment.
Call Alnor directly for assistance if necessary.
Repair/Calibration
Please follow these steps should you require factory
service or repair of your Alnor Instrument:
1. Contact the Alnor distributor in your country
for cost of repair or recalibration and shipping
instructions. Obtain a Purchase Order or
purchase order number from your Purchasing
Department showing instrument model
number and cost of repair and/or recalibration.
Securely package your instrument in a strong
container surrounded by at least two inches
(5 cm) of suitable shock-absorbing material.
Include the Purchase Order, or Reference
the Purchase Order on your packing slip.
2. Contact the Customer Service at Alnor for
cost of repair or recalibration, Return Material
Authorization (RMA) number, and shipping
instructions. On instruments being returned
to the factory for recalibration, determine
whether you prefer:

15
• Certificate of Calibration, no data
(statesinstrumentchecked and found to
be within accuracy claimed and speci-
fications listed in current literature).
• Certificate of Traceability to National
Institute of Standards and Technology
(NIST, formerly NBS) with data (states
instrument compared with factory
standard traceable to NIST, lists of cali-
bration data, i.e., “Standards reads...”
and “This instrument reads...”)
Obtain a Purchase Order or purchase order
number from your Purchasing Department
showing instrument model number and
cost of repair and/or recalibration. Securely
package your instrument in a strong
container surrounded by at least two inches
(5 cm) of suitable shock-absorbing material.
Include the Purchase Order, or Reference
the Purchase Order on your packing slip.
Mark the outside of the shipping container
with the RMA Control number.
3. Forward the instrument prepaid. See back
cover for factory addresses.
Please note that instruments received improperly
marked or without an accompanying Purchase
Order may be returned at your expense. Please also
note that if an RMA number has been assigned, it
will be canceled if the instrument is not received by
ALNOR within 60 days.

16
Equipment Log
Date of Purchase ___________________________________________________
Calibration Record__________________________________________________
1. __________________ 2. _________________ 3.___________________
4. __________________ 5. _________________ 6.___________________
7. __________________ 8. _________________ 9.___________________
10. __________________ 11. _________________ 12. ___________________
Notes: ____________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
Ownership/Calibration Log

17
Warranty
Alnor Instrument Company (Alnor) warrants this product to
be free of defects in material and workmanship for a period
of two years from the date of original purchase. If the product
should become defective during the warranty period, Alnor
will repair it or elect to replace it free of charge under the
following conditions:
1. Product is returned postpaid per the instructions
for return, located in the owner’s manual.
2. Owner submits proof of original date of pur-
chase.
3. Alnor will inspect product for defects in mate-
rial and workmanship. Alnor’s decision as to
existence of defect, and in the case of defect,
to repair or replace will be final.
THIS WARRANTY IS EXCLUSIVE. THERE ARE NO
OTHER WARRANTIES EITHER EXPRESSED OR IM-
PLIED. SPECIFICALLY AND WITHOUT LIMITATION,
THERE IS NO WARRANTY, EXPRESSED OR IMPLIED,
OF MERCHANTABILITY OR FITNESS FOR PARTICU-
LAR PURPOSE.
This warranty is void if product is misused, used contrary to
procedures set forth in the owner’s manual, or if product is
serviced by anyone other than Alnor’s authorized service.
This warranty does not cover consumables such as light
bulbs, paper, batteries, etc.
Alnor’s liability for this product is limited to the above stated
warranty and shall not in any event exceed the cost of the prod-
uct.Inno event will Alnor be liable foranydirect or consequen-
tial damages, including but not limited to lost profits, loss of
use, inaccuracies, loss of data, dismantling or reinstallation.
ALNOR INSTRUMENT COMPANY
7555 North Linder Avenue September 1996
Skokie, Illinois, 60077 USA Printed in USA
Toll-Free [phone] Part No. 116-159-151 Rev. 4
Telephone [phone] © Copyright 1996 Alnor Instrument Company
Fax [phone]