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T-APM - Apex Premier F
UME
H
OOD
M
ONITOR
T-APM 0133MAN00015 - Rev J ECN - JUL 2017
Page 22 of 61
Configuration of the APM
Numeric Display Mode
Numeric mode, which is the most commonly used display mode, provides a live reading of fume hood
face velocity. Because real-time airflow measurements are dynamic by nature, the APM has an
adjustable averaging function to smooth out the displayed velocity readings.
Selection 1
: Once
NUMERIC
display is chosen, the APM will ask if the displayed velocities are to be in
IMPERIAL
(Feet Per Minute or FPM) or
METRIC
(Meters Per Second or MPS)
[SCREEN 3A]
. Once
IMPERIAL
or
METRIC
is chosen, all units within the APM are changed to that selection. For example, if
IMPERIAL
is
chosen, all set points, alarm points, caution bands, configuration and calibration screens, etc are in FPM.
Selection 2
: After the correct units are chosen, next the APM will ask for the desired displayed resolution,
either 1FPM or 5FPM (0.005MPS or 0.025MPS)
[SCREEN 5A]
. If high accuracy is not required to be
displayed, the higher velocity setting will display a more “stable” reading and not vary as much as the
lower velocity setting. Note: this is for display purposes ONLY. The APM always internally reacts off of a
1 FPM (0.005MPS) resolution.
Selection 3
: Finally the APM will ask for a desired smoothing rate, this is selectable in three increments
[SCREEN 6A]
:
FAST (REAL TIME)
- The APM will update the displayed velocity as fast as it can calculate it. The
displayed number is not averaged at all.
MEDIUM (5 SEC. AVG.)
– The APM will average it’s readings for 5 seconds then display the
averaged readings. This slows down the displayed response time slightly and allows for a
smoother display of the actual velocity.
SLOW (10 SEC. AVG.)
– The APM will average it’s readings for 10 seconds then display the
averaged readings. This selection also slightly slows down the displayed response time.
It’s
designed to minimize intermittent drafty locations, heavy traffic areas, etc. By averaging over 10
second, the APM can smooth out the displayed face velocity and present a better overall face
velocity indication.
Mute, Purge & Alarm Horn Settings
The APM allows the technician to configure the front
MUTE
and
PURGE
buttons and also the alarm horn
internal to the APM. Not all applications will require all of these functions and disabling them may be
beneficial, here is how it is done.
Selection 1
: Under the configuration menu, select
HORN, MUTE AND PURGE BUTTONS
see
[SCREEN1B]
.
Selection 2
: Configure Horn
[SCREEN 2B]
Select
ENABLE
to use the internal horn to alert of alarms or
DISABLE
to permanently turn it off. The horn is
used to alert the operator in case of an alarm condition, either internal or external in nature.
Selection 3
: Configure Mute Button
[SCREEN 3B]
Note: this selection only is displayed if the alarm horn is enabled. The front
MUTE
button can be
ENABLED
,
DISABLED
, or set to
RE-BEEP
mode. Re-beep mode will allow the alarm horn to be muted, but will
send out two
short duration “beeps” to notify the operator the APM is still in an alarm mode. This is a
helpful way to make sure the operator
doesn’t simply shut off an alarm and forget to take corrective
action.
Selection 4
: Mute Re-beep Delay
[SCREEN 4B]
Note: this selection is only displayed if the alarm horn is enabled and re-beep mode is selected. This is
the time duration allowed before the APM emits two
short duration “beeps” while in re-beep mode.
Selection 5:
Configure Purge Button
[SCREEN 5B]
Select
ENABLE
to use the front
PURGE
button to send a closed contact to a front end system controlling the
fume hood air valve or
DISABLE
to disregard any pressing of the front panel button. This button is used to
Summary of Contents for Apex Premier
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