Alnor AXD 530 User manual

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A TSI Company
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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.