T-APM - Apex Premier F
UME
H
OOD
M
ONITOR
T-APM 0133MAN00015 - Rev J ECN - JUL 2017
Page 16 of 61
Calibration of the APM
Step 9: Traverse Hood Face at Min. Sash Position (High Velocity Point)
Perform a face velocity traverse, with a calibrated instrument, across the open area of the fume hood
face. Once the average face velocity reading is obtained, press the touch screen
[SCREEN 8N]
.
Step 10: Enter Traversed Reading (High Velocity Point)
Following the same process described in Step 4, enter the third measured value into the APM
[SCREEN
9N]
. Press the
ACCEPT
button when finished.
Step 11: Completion of the Three-Point Calibration
The final screen in the calibration process allows you to exit completely out of the calibration and
configuration menus and go into monitor mode, or to continue to the configuration section of the APM.
Press
EXIT
to go to monitor mode or
CONTINUE TO CONFIG MENU
to configure the APM
[SCREEN10K]
.
One-Point Calibration
The One-Point Calibration Procedure is intended for applications where the measured velocity is
constant, such as variable air volume applications (VAV) without flow limits and without set-back.
The One-Point calibration process requires only one face velocity reading to be entered into the APM.
The cal
ibration affects the “offset” of the factory calibrated curve only and does not result in a change of
the slope of the factory calibration.
Step 1: Enable One-Point Calibration Mode
With the touch screen enabled and correct password entered, press
CAL MENU
(reference
[SCREEN 1]
&
[SCREEN 1G]
). Using the up and down arrows [
or
] select
ONE-POINT CALIBRATION
,
[SCREEN 1K]
.
Step 2: Move Sash to Nominal Working Height
Following the instructions on the APM
[SCREEN 11K]
, move the sash to it’s normal operating position.
Typical operating position may be; 18” (45.73cm) from the work surface, to the sash stops if available,
one horizontal pane open, etc. (Consult
the fume hood manufacturer’s specifications for all proper air
flow details). Press the screen to confirm sash is in the proper position.
Step 3: Traverse Hood Face
Perform a face velocity traverse, with a calibrated instrument, across the open area of the fume hood
face. Once the average face velocity reading is obtained, press the touch screen
[SCREEN 12K]
.
Step 4: Enter Traversed Reading
Using the plus and minus signs [
+
or
-
] on the touch screen
[SCREEN 13K]
, enter the value obtained
in the previous step.
Note: By pressing and holding the sign, the number will first change at a slow rate
then at a fast rate automatically.
Depressing the
RESET
button will return the velocity value to the factory
default setting.
Press the
ACCEPT
button when the desired value appears in the velocity box and step a few feet away
from the hood. After a 5-second delay, the APM will acquire 15 data points while displaying the
measured values on the LCD screen
[SCREENS 5K & 6K]
.
Observe the display and confirm that the
values are consistent and do NOT vary by more than +/- 5 fpm (0.02 m/s)
. If the values are within
limits then proceed to the next step. If the values are unstable, then STOP calibration process and
determine the cause of problem before proceeding.
Содержание Apex Premier
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