Statistics
Minimum and maximum readings can be viewed in the “STAT” submenu. While
they are being viewed, the unit of measure will toggle with the word “MIN” or
“MAX”. The minimum and maximum values can be reset by pressing and holding
the
ENTER
button when viewing the values. They are also reset when the 477AV
is turned off, and when the mode of operation is changed. Here are the steps to get
to minimum and maximum values.
1. Press
MENU
.
2. Scroll down to
STAT
and press
ENTER
.
3. Scroll to view the minimum and maximum values.
Calibration
If the measurements are not reading within specifications compared to a calibrated
reference, the zero and span values can be adjusted in the calibration menu.
When zero calibration is preformed, both ports should be vented to atmospheric
pressure. When span calibration is performed, positive pressure equivalent to the
max end of the factory pressure range should be applied to the positive pressure
port with the negative port vented to atmospheric pressure. This setting can be
cleared by a factory default.
1. Press
MENU
and MEM will be displayed.
2. Press
DOWN
arrow until CAL is displayed.
3. Press
ENTER
.
4. Vent the pressure ports to atmospheric pressure.
5. Press and hold
ENTER
.
6. Press
DOWN
arrow.
7. Apply pressure to the positive pressure port.
8. Press and hold
ENTER
.
Auto Power Off
The 477AV will turn off if no key is pressed for a set amount of time. The default
time is 20 minutes, but may be changed using the menu to any value from 1 – 20
minutes, or disabled. Here are the steps.
1. Press
MENU
.
2. Scroll with the
UP
and
DOWN
arrows to “OFF” option and press
ENTER
.
3. Using the
UP
and
DOWN
arrows, select a minute value for the auto-shut off.
4. Press
ENTER
to lock in that value.
5. Press
MENU
twice to return to the main screen.
Sound
The 477AV can be set to beep during button presses. This feature can be turned
on or off using the “BEEP” menu option. Here are the steps.
1. Press
MENU
.
2. Scroll down to the “BEEP” menu option and press
ENTER
.
3. Using the
UP
and
DOWN
arrows, select “ON” or “OFF” and press
ENTER
.
Factory Default
The 477AV can be reset to factory conditions using the menu’s "RSET" option.
This will reset all settings, including a zero or span. Here are the steps.
1. Press
MENU
.
2. Scroll using the
UP
and
DOWN
arrows to “RSET” and press
ENTER
.
3. Scroll down to “YES” and press
ENTER
.
Over Pressure/Under Pressure Alarm
If over pressure or under pressure is applied to the unit, “OvFL” or “UnFL” will
display respectively and an audible alarm will sound. The threshold is ±10% of the
477AV's range. Do not exceed the maximum rated pressure of this manometer;
doing so could cause a permanent damage to the sensor, rupture the housing,
and/or cause injury.
Battery Monitor
The 477AV monitors its battery voltage whenever it’s powered on. If the voltage is
low, the “LOW BAT” icon will appear on the display. A weak battery can cause
inaccurate measurements. It is recommended to replace the battery as soon as
possible to ensure top functionality. Do not leave an exhausted battery in the unit
due to potential leakage.
Maintenance
The Series 477AV Handheld Digital Manometer is not field serviceable and should
be returned if repair is needed (field repair should not be attempted and may void
warranty). Be sure to include a brief description of the problem plus any relevant
application notes. Contact customer service to receive a return goods authorization
number before shipping.
Advanced Menu
In addition to the features accessible directly from the buttons, there is an
advanced menu that allows access to stored values in memory, mode of operation,
digital dampening, measurement statistics, calibration, power saving, audible
alarm, and factory defaulting the device. The complete diagram of the advanced
menu can be found on the last page of this instruction manual or the back of the
unit.
1. Press and release the
MENU
button to access the advanced menu.
2. Use the
UP
and
DOWN
arrow buttons to cycle through the menu options.
3. Press
ENTER
once the desired option is selected.
4. Use the
UP
and
DOWN
arrow buttons to make changes to that option.
5. Press
ENTER
to save the changes.
6. Press
MENU
button to return to the menu or home screen.
Memory (MEM)
Saved readings can be viewed by pressing
MENU
and then
ENTER
. There will be
two options: “LOG” and “AVG”.
“LOG” shows saved readings in the order they were stored. “AVG” displays the
average value of the saved readings and is updated based on the content of the
log files. Empty memory locations are not shown. If no readings have been stored,
the display will read “----”. When the memory is full, the display will flash “ERR
FULL” and discard the reading. A reading cannot be stored when a menu is being
displayed.
Erasing Stored Readings
Stored readings can be erased using the menu.
1. Press
MENU
and MEM will be displayed.
2. Press
ENTER
.
3. Press
ENTER
as “LOG” is displayed on top of the screen.
4. Scroll using the
UP
and
DOWN
arrows to the value you wish to erase (or any
if you want to erase all).
5. Press
ENTER
.
6. This will take you to the “Erase” submenu. The “Erase” submenu has three
options; “no” will do nothing, “OnE” will erase the most recently viewed reading,
and “ALL” will erase all stored readings.
It should be noted that the measurement mode cannot be changed unless the
memory values are erased. (This prevents a user from accidently saving readings
with different units of measure.)
Changing Measurement Mode
Besides changing the measurement mode using the front buttons, it can also be
changed in the menu. The 477AV can be set to display pressure, velocity, or
volumetric flow. Once a mode is selected, the menu will continue to prompt for unit
of measurement, K-factor, duct shape and duct size when applicable. Duct size
and shape are input in inches or centimeters, depending on whether the primary
unit of measure is metric or standard. Settings for all modes are retained in the
memory even if the mode is changed or the 477AV is turned off.
The mode
cannot
be changed if there are readings saved in memory, or if the Hold
feature is on. (This prevents a user from accidentally saving readings with different
units of measure.) If a user tries to access the mode submenu when readings are
saved, the display will flash “ERR Log”. If a user tries to access the mode submenu
when the Hold feature is active, the display will flash “ERR Hold”.
1. Press
MENU
and MEM will be displayed.
2. Press
DOWN
arrow and MODE will be displayed.
3. Press
ENTER
.
4. Using the
UP
and
DOWN
arrows, find the mode (velocity, pressure, or flow) you
want.
5. Press
ENTER
to confirm the desired mode.
6. The display will prompt for units of measurement. Scroll through the options
with the
UP
and
DOWN
arrows until the unit of choice is found.
7. Press
ENTER
.
Damping Function
The “DAMP” submenu compensates for the fluctuating readings by averaging input
values to display a more stable readout. The damping value can be set to any
number between 1 to 9. The default value is set to 4. Here are the steps to change
the damp value.
1. Press
MENU
.
2. Scroll using the
UP
and
DOWN
arrows to select “DAMP” and press
ENTER
.
3. Using the
UP
and
DOWN
arrows, choose a number in the range of 1 to 9 and
press
ENTER
.
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