Accutrol Apex Premier Instruction manual

Apex Premier
Face Velocity Monitor
Installation, Operation & Maintenance Manual
Manual 0133MAN00015 Rev J
*WRITTEN FOR APM FIRMWARE VERSION 3.2TA OR LATER
Accutrol LLC
21 Commerce Dr.
Danbury, CT, 06810
Tel: [phone]
www.accutrolllc.com

Warranty
The monitor has no serviceable parts inside, removal of
the rear enclosure or any other type of tampering shall
void all warranties stated and contained herein.
Accutrol LLC. warrants that this product, under normal
use and service as described in this Operation and Service
manual, is free from defects in workmanship and material
for a period of twenty-four months from the date of
shipment to the customer. This limited warranty is subject
to the following conditions:
With respect to any repair services rendered, Accutrol
warrants that the parts repaired or replaced will be in
good working condition, under normal use, for the period
of the original warranty, or for 90 days from date of
repair if the original warranty period has expired.
Unless specifically authorized by Accutrol in writing, no
warranty is made with respect to, and no liability is
assumed in connection with, any goods, which are
incorporated into other products or equipment by the
Buyer.
The foregoing is in lieu of all other warranties and is
subject to the conditions and limitations stated herein. No
other expressed or implied warranty of fitness for
particular purpose or merchantability is made.
The exclusive remedy of the user or purchaser, and the
limit of the liability of Accutrol or any other seller for
any and all losses, injuries, or damage resulting from the
use of this product shall be the return of the product
and the refund of the purchase price or, at the option of
Accutrol or any authorized seller, the repair or
replacement of the product. In no event shall Accutrol
or any other seller be liable for any incidental or
consequential damages.

Table of Contents
MODEL CODE DESCRIPTION...............................................................................................................................5
OPTIONAL AND/OR SPARE PARTS LIST:..........................................................................................................5
INTRODUCTION .......................................................................................................................................................6
GETTING STARTED / UNPACKING.....................................................................................................................8
STANDARD INSTALLATION .................................................................................................................................9
STEP 1: CHOOSING A SUITABLE LOCATION................................................................................................................9
STEP 2: CUTTING THE MOUNTING HOLE....................................................................................................................9
STEP 3: (OPTIONAL)LOCATING THE EXTERNAL REFERENCE PROBE .........................................................................9
STEP 4: (OPTIONAL)INSTALLING THE EXTERNAL REFERENCE PROBE.....................................................................10
STEP 5: LOCATING THE HOOD PROBE......................................................................................................................10
STEP 6: INSTALLING THE HOOD PROBE....................................................................................................................10
ELECTRICAL CONNECTIONS............................................................................................................................11
STEP 1: POWER ........................................................................................................................................................11
STEP 2: DIGITAL INPUTS ..........................................................................................................................................11
STEP 3: RELAY OUTPUTS.........................................................................................................................................11
STEP 4: (OPTIONAL)ANALOG OUTPUT....................................................................................................................11
INITIAL POWER-UP OF MONITOR ...................................................................................................................12
TOUCH SCREEN & PASSWORD PROTECTION..............................................................................................12
STEP 1: ENABLE THE TOUCH SCREEN......................................................................................................................12
STEP 2: PASSWORD PROTECTION.............................................................................................................................12
CALIBRATION BASICS.........................................................................................................................................13
TWO-POINT CALIBRATION PROCEDURE......................................................................................................14
STEP 1: ENABLE TWO-POINT CALIBRATION MODE .................................................................................................14
STEP 2: MOVE SASH TO FULL OPEN (LOW VELOCITY POINT) .................................................................................14
STEP 3: TRAVERSE HOOD FACE AT MAX.OPEN SASH (LOW VELOCITY POINT)......................................................14
STEP 4: ENTER TRAVERSED READING (LOW VELOCITY POINT) ..............................................................................14
STEP 5: MOVE SASH(ES)TO MIN.OPEN POSITION (HIGH VELOCITY POINT)...........................................................14
STEP 6: TRAVERSE HOOD FACE AT MIN.SASH POSITION (HIGH VELOCITY POINT) ................................................14
STEP 7: ENTER TRAVERSED READING (HIGH VELOCITY POINT)..............................................................................14
STEP 8: COMPLETION OF THE TWO-POINT CALIBRATION ........................................................................................14
THREE-POINT CALIBRATION PROCEDURE..................................................................................................15
STEP 1: ENABLE CALIBRATION MODE.....................................................................................................................15
STEP 2: MOVE SASH(ES)TO FULL OPEN (LOW VELOCITY POINT)...........................................................................15
STEP 3: TRAVERSE HOOD FACE AT FULL OPEN.......................................................................................................15
STEP 4: ENTER TRAVERSED READING .....................................................................................................................15
STEP 5: MOVE SASH A MID-OPEN POSITION (MID VELOCITY POINT) .....................................................................15
STEP 6: TRAVERSE HOOD FACE AT MID-OPEN POSITION (MID VELOCITY POINT)..................................................15
STEP 7: ENTER TRAVERSED READING (MID VELOCITY POINT) ...............................................................................15
STEP 8: MOVE SASH(ES)TO MIN.POSITION (HIGH VELOCITY POINT).....................................................................15
STEP 9: TRAVERSE HOOD FACE AT MIN.SASH POSITION (HIGH VELOCITY POINT) ................................................16
STEP 10: ENTER TRAVERSED READING (HIGH VELOCITY POINT)............................................................................16
STEP 11: COMPLETION OF THE THREE-POINT CALIBRATION ...................................................................................16
ONE-POINT CALIBRATION.................................................................................................................................16
STEP 1: ENABLE ONE-POINT CALIBRATION MODE..................................................................................................16
STEP 2: MOVE SASH TO NOMINAL WORKING HEIGHT.............................................................................................16
STEP 3: TRAVERSE HOOD FACE...............................................................................................................................16
STEP 4: ENTER TRAVERSED READING .....................................................................................................................16
STEP 5: COMPLETION OF THE ONE-POINT CALIBRATION.........................................................................................17
MANUAL CALIBRATION ADJUSTMENTS.......................................................................................................18
➢ MANUAL CALIBRATION ADJUSTMENT FOR ONE-POINT CALIBRATION ROUTINE................................................18
STEP 1A:ENABLE CALIBRATION ADJUSTMENT MODE ............................................................................................18
STEP 2A:ENTER IN DESIRED OFFSET VALUE...........................................................................................................18
STEP 3A:VERIFY NEW READING .............................................................................................................................18
STEP 1B:ENABLE CALIBRATION ADJUSTMENT MODE.............................................................................................18
STEP 2B:SELECT CALIBRATION POINT TO ADJUST..................................................................................................18
STEP 3B:HIGH VELOCITY CALIBRATION POINT ADJUSTMENT ................................................................................18

STEP 4B:VERIFY NEW READING .............................................................................................................................19
STEP 5B:LOW VELOCITY CALIBRATION POINT ADJUSTMENT.................................................................................19
STEP 6B:VERIFY NEW READING .............................................................................................................................19
STEP 7B:EXITING OUT OF THE CALIBRATION ADJUSTMENT MENU.........................................................................19
CONFIGURATION OF THE APM ........................................................................................................................20
DISPLAY MODES....................................................................................................................................................21
ALPHA DISPLAY MODE ...........................................................................................................................................21
GRAPHIC DISPLAY MODE ........................................................................................................................................21
NUMERIC DISPLAY MODE .......................................................................................................................................22
MUTE, PURGE & ALARM HORN SETTINGS...................................................................................................22
DIGITAL INPUT CONFIGURATION...................................................................................................................24
RELAY OUTPUT CONFIGURATION..................................................................................................................26
ANALOG OUTPUT CONFIGURATION (OPTIONAL)......................................................................................26
CONTRAST ADJUSTMENT...................................................................................................................................27
ALARM CONFIGURATION ..................................................................................................................................28
CHANGE PASSWORD............................................................................................................................................29
CALIBRATION MENU SELECTION ...................................................................................................................30
RESTORE FACTORY DEFAULTS.......................................................................................................................30
CALIBRATE TOUCH SCREEN.............................................................................................................................30
EXIT CONFIGURATION AND CALIBRATION.................................................................................................30
MAINTENANCE.......................................................................................................................................................31
APPENDIX A: MOUNTING HOLE TEMPLATE DIMENSIONS ....................................................................32
APPENDIX B: APM DETAILED DESCRIPTION ..............................................................................................33
APPENDIX C: PROPER WIRING TECHNIQUES.............................................................................................34
APPENDIX D: REFERENCE PROBE INSTALLATION...................................................................................35
APPENDIX E: ...........................................................................................................................................................36
SPECIFICATIONS...................................................................................................................................................36
APPENDIX F: CONFIGURATION AND CALIBRATION SCREENS.............................................................37
APPENDIX G: OPERATOR SCREEN FLOW CHARTS...................................................................................42
APPENDIX H: AVAILABLE EXTERNAL ALARM MESSAGES....................................................................44
APPENDIX I: DEFAULT VALUES OF APM......................................................................................................45
APPENDIX J: TROUBLESHOOTING.................................................................................................................47
APPENDIX K: ADDITIONAL MOUNTING OPTIONS.....................................................................................48
APPENDIX L: DOCUMENT REVISION HISTORY..........................................................................................57
INDEX........................................................................................................................................................................58

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Model Code Description
T –A P M - __ __
Basic Model Number Includes;
(1) Apex Premier Monitor
(1) Hood Probe with 5’ Tubing
(2) Mounting Screws
(1) Quick Reference Guide
(1) Mounting Template
Analog Voltage Output Option
0 = Standard I/O: (2) Digital Inputs
(2) Relay Outputs
1 = Analog Option: (2) Digital Inputs
(2) Relay Outputs
(1) 0-10Vdc Analog Output
External Reference Probe
0 = No External Reference Probe
1 = External Reference Probe
Example: T-APM-10
Includes the following:
(1) Apex Premier Monitor
(1) Hood Probe with 5’ Tubing
(2) Mounting Screws
(1) Quick Reference Guide
(1) Mounting Template
Analog Option:
(2) Digital Inputs
(2) Relay Outputs
(1) 0-10Vdc Analog Output
Optional and/or Spare Parts List:
Item Description
Accutrol Part Number
120 VAC Power Adaptor
1436PSW00003
5’ Probe Assembly
2001ASM00551
Mounting Screws
2015HDW00410
Terminal Block Kit
1508TBK00016
Battery Backup System
2001ASM00553
Dual Probe Kit (>8’ wide hood)
2001ASM00555
APM Extender Kit #1 **
T-APM-EXTENDER1
APM Extender Kit #2 **
T-APM-EXTENDER2
** Reference Appendix K for more information

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Introduction
Welcome to the Apex Premier Fume Hood Monitor Installation, Operation and Maintenance Manual. The
Apex Premier Monitor (APM) has been designed to provide accurate and reliable real-time monitoring of
fume hood face velocity on a wide variety of fume hoods including; variable air volume, constant air
volume, and high performance - low flow.
LED Status
Indicators
Room Reference
(Standard)
Touch Sensitive
Graphic Display
User Push Buttons
Mounting Screws
Figure 1, Front View of APM
The revolutionary touch screen display allows the technician to easily calibrate and configure the APM
with no external tools or interfaces, yet remains completely invisible to the operator. Password protection
is utilized to prevent any unauthorized personnel from changing calibration or configuration items.
The APM utilizes 3 front-mounted push buttons that allow the operator to mute the alarm horn, enable
purge mode, and also view the internal settings of the APM. The mute and purge push buttons can also
be disabled if not required.
NOTE: The protection and performance provided by the APM may be impaired if used in a manner
not specified or contained in this manual.

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Introduction
APM Features
Password Protection
Touch Screen Setup with User-Friendly On-Screen Instructions
Jumbo L.E.D.’s to Indicate Hood Status at a Glance
Loud Audible Horn to Alert the Operator of Alarm Conditions
Three Display Modes of Operation
oAlpha Mode –displays hood performance using text only
oNumeric Mode –displays actual face velocity at all times
oGraphic Mode –displays trend line of face velocity over a time interval
Configurable High & Low Velocity Alarms with Selectable Time Delays
Configurable Warning Bands to Alert Operator of Potential Alarm Conditions
Full Unoccupied Mode, Enabling Alternate Alarm Configuration Settings.
Dual Digital Inputs for Communicating External Alarms or Occupancy Status
Selectable External Warning Messages to Inform Operator of External Problems Not Directly
Relating to the Fume Hood
Dual Relay Outputs for Purge Mode or Communicating Alarms
One, Two or Three Point Calibration Routines Built-in
Available Calibration Adjustments to “tweak” Velocity to Exact Values
Built-in Internal Reference Probe, with Optional External Reference Available. Note: External
Reference Must be Ordered at Time of Purchase
Operates from Industry Standard 24VAC or 120 VAC Using Optional Wall Plug Transformer
Removable Terminal Blocks to Simplify Wiring
Important Considerations
Prior to installing and calibrating your Accutrol APM , reference ANSI/ASHRAE STANDARD 110-
1995 for proper methods of testing performance of laboratory fume hoods.
Per ASHRAE guidelines, “The performance of a laboratory fume hood in providing protection for the
worker at the face of a hood is strongly influenced by the aerodynamic design of the hood, the ventilation
of the laboratory room, and by other features of the laboratory in which it is installed.”
The following items are identified by ASHRAE as being important factors contributing to the safe
operation of laboratory fume hoods:
1. Cross-drafts. Air currents may, by creating turbulent air pockets, draw contaminants from the hood.
Such cross-drafts could be caused by air supply diffusers or grilles, open windows or doors, or rapid
movements of people in front of the hood.
2. Work procedures. There is substantial evidence to suggest that all work in a hood should be
conducted as far back in the hood as practical. Typically, users have standardized the requirement that
all work should occur at least 6 inches behind the face of the hood. However, significantly improved
protection can be achieved by working farther than 6 inches from the face of the hood.
3. Internal obstructions. The location of too much laboratory equipment (bottles, glass, etc.) in the hood
will disturb airflow patterns into the hood.
4. The procedure being performed. The intrinsic hazard of the procedure being performed can affect
the level of safety required by the user.
5. Thermal challenge. Heat produced in the hood can cause significant disturbance in the hood
performance and even cause leakage of warm and possibly contaminated air from the top of the hood or
from behind the sash.
6. Rate of response. The transient state or interval required for a variable-air-volume hood to respond to
a rapid opening of the sash, or the time interval required for a hood to respond to a change in static
pressure in the main exhaust duct serving multiple hoods, may affect hood performance.

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Getting Started / Unpacking
Figure 2 shows all the components shipped standard with each APM. Before proceeding, verify all
components are accounted for and are not damaged.
Figure 2, Supplied Equipment
Item 1 - One (1) Apex Premier Fume Hood Monitor (APM), Part Number T-APM
Item 2 - One (1) Quick Reference Guide, Part Number 0133MAN00016
Item 3 - One (1) Mounting Hole Template, Part Number 2111TAG00643
Item 4 - One (1) Hood Probe, Part Number 2001ASM00551
Item 5 - Two (2) Mounting Screws, Part Number 2015HDW00410
1
2
3
4
5

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Standard Installation
Step 1: Choosing a Suitable Location
Care must be observed when choosing a suitable location for the APM if the internal reference is being
utilized (typical install). Locate a position on the fume hood pillar that is free from piping, electrical conduit
or obstacles. The APM requires at least 4” (10.2cm) of depth behind it for tubing and wiring clearance.
Care must be taken to stay away from external air influences such as air registers, diffusers, equipment
cooling fans, cross drafts, doors, windows, or anything influencing air flow. Reference Appendix K for
other available mounting options.
Figure 3 shows a typical location for mounting the APM. When possible, always install the APM above
the maximum height of the sash pane bottom to decrease the chances of a cross draft across the face of
the APM and into the fume hood.
Monitor
Bottom of
Sash Pane
Figure 3, Typical Fume Hood Installation Location
Step 2: Cutting the Mounting Hole
Use the template provided to aid in finding the best location (see Appendix A). Cut along the inner
dashed dimensions of the template and drill the two pilot holes. Slip the APM into the cutout to test fit the
unit and confirm the depth is correct. Do not attach the unit to the hood until all electrical connections and
the hood probe and tubing have been installed. Once all connections have been completed, use the two
screws provided to permanently mount the APM to the fume hood.
Step 3: (Optional) Locating the External Reference Probe
If the APM was ordered from the factory with an external reference probe in lieu of the internal reference,
observe the same precautions in choosing a good location for the external reference as previously stated
in step 1. Typical good locations are on the side of the hood casing or on the front pillar, above operator
height to avoid cross drafts developed by moving quickly in front of the hood.
Warning: Do not install the reference probe in a location that is not common with the hood to which it is
measuring. Unacceptable locations include; closets, inside the base cabinet, inside the hood chase,
corridors, ceilings, etc. Always keep the tubing length to a minimum (less then 5 feet) when possible.
Exercise care so tubing does not become kinked or pinched due to installation or moving internal parts of
the sash.

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Standard Installation
Step 4: (Optional) Installing the External Reference Probe
Once a suitable location has been selected for the Room Reference Probe, drill a 7/16” diameter (11mm)
hole for mounting probe. Referencing Appendix D, feed the supplied clear tubing connected to the probe,
through the drilled hole. Carefully push the tubing over the room reference port located on the rear of the
APM enclosure (refer to Appendix B). Press the room reference probe firmly to seat properly into
location. Note: various sealants can be used but are not required.
Step 5: Locating the Hood Probe
The hood side wall probe is best located on the same side of the fume hood as the APM to keep tubing
length to a minimum. Due to the wide variety of fume hood types and configurations available, there is no
single standard hood probe location that will work for all fume hoods manufactured. Typical hood probe
locations are approximately 4” to 10” (10.2cm to 25.4cm) back from the rear of the sash panel and
approximately 2” to 8” (5.1cm to 20.3cm) above the highest vertical opening of the sash. Refer to Figure
4 for a diagram of approximate locations. If possible, contact the fume hood manufacturer for
optimum side wall probe location guidelines.
Sill
SASH WINDOW
A
B
Typical
Hood Probe
Location
Side Profile of Fume Hood
A dim. = approx. 4" - 10" (10.2 cm - 25.4 cm)
B dim. = approx. 2" - 8" (5.1 cm - 20.3 cm)
Back Front
Figure 4 Typical Hood Reference Probe Locations
Step 6: Installing the Hood Probe
Once a suitable location has been selected for the Hood Probe, drill a 7/16” diameter (11mm) hole in the
side wall of the fume hood. Note: Reference fume hood manufacturer recommendations for best
method for drilling hood sidewall. Referencing Appendix D, feed the supplied clear tubing through the
drilled hole and carefully push it over the sensor port located on the rear of the APM enclosure (refer to
Appendix B). Press the hood probe firmly to seat it properly into the side of the fume hood. Note: various
sealants can be used but are not required. Contact the fume hood manufacturer for acceptable sealant
types and information.
NOTE:
Sash is Shown In the
Full-Open Position.

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Electrical Connections
The steps to correctly wire the APM are as follows; reference Appendix C for proper wiring techniques
and Appendix E for all electrical specifications of the APM.
Step 1: Power
For 24 VAC Control Power –On the back of the APM enclosure, remove the 2-position green terminal
block labeled POWER INPUT. Loosen the two screws and insert power wires and tighten screws.
Caution: Observe proper polarity when wiring multiple APM’s to the same 24 VAC transformer.
Always connect the HOT 24 VAC power lead to the power (+) terminal, and the neutral lead to the
power (-) terminal. Damage to the APM may result if wired improperly and will void the warranty.
For wall pluggable power cable –plug the optional power cube into an acceptable 120 VAC power outlet.
Connect the power terminal block to the power input on the rear of the APM.
Step 2: Digital Inputs
Per job requirements, connect the device sending the unoccupied or external alarm dry contact closure
between Digital Input 1 or 2 and the common terminal. The digital inputs are software configurable to
handle either input. The digital inputs are actuated by a dry contact closure to common, maximum
contact resistance is 1000 ohms.
Step 3: Relay Outputs
The APM has two independent relay outputs available. Each relay is rated for a maximum of ½ A at
120VAC or 1A at 30Vdc. These relays are typically used to communicate fume hood Alarms to the
Building Management System and send a Purge command to the fume hood exhaust controller. Through
software configuration, each relay output can be set to operate as either normally closed or normally
open. With no power applied to the APM, Relay 1 fails to a normally open position, while Relay 2 fails to
a normally closed position.
Note: If the APM has been ordered from the factory with the optional Analog Output, Relay 1 is rated for
a maximum of 5A at 250VAC or 30VDC and fails normally open. Relay 2 remains the same as stated
above. Reference Appendix C for all APM specifications.
Step 4: (Optional) Analog Output
The Analog Output is only available if ordered from the factory as an option. The APM’s Analog Output is
software selectable (from 0 to 10Vdc in 0.1Vdc steps) and is proportional to the indicated face velocity
displayed. Connect the Analog Output positive terminal to the positive input terminal of the monitoring
device and connect the Analog Output the ground terminal to the negative terminal of the monitoring
device.

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Initial Power-Up of Monitor
The monitor incorporates an initial self-test feature which can be activated on initial power up. During
power-up, all 3 LEDs will turn on and the screen will display firmware version and date. To activate the
interactive self-test; depress any of the three front buttons or the touch screen display within 3 seconds of
power-up. Pressing any of the three front buttons will toggle the LED directly above it to either be on or
off while pressing the touch screen will invert all the pixels and initiate a beep from the horn. These tests
are designed to verify proper operation of the LED’s, touch screen, display, horn and buttons. Internally,
the processor runs a self test and will alert the user if a problem is found. The monitor resumes normal
mode after 3 seconds of no activity with the buttons or touch screen.
Refer to Appendix F for actual displayed APM screens, specific screens are called out in brackets and
highlighted as shown: [SCREEN XX].
On initial power up, the monitor will display the message Field Calibration Required [SCREEN 1P](and
Warning Face Velocity Below Range [SCREEN 2P]if the fans are off or Warning Face Velocity Above
Range [SCREEN 3P]if the face velocity is too high for the monitor to accurately measure.) The Field
Calibration Required message prompts the user to calibrate the unit so a non-calibrated monitor cannot
be unintentionally installed and display erroneous face velocities out of the box. This is only displayed on
a non-calibrated unit.
Touch Screen & Password Protection
The password protected touch screen only needs to be activated for performing configuration and
calibration of the APM. During normal operation the touch screen is inactive. To enable the touch
screen perform the following steps.
Step 1: Enable the Touch Screen
To enable the touch screen; simultaneously press the MUTE and SCROLL buttons until the password
screen [SCREEN 0] is initialized, (approximately 5 seconds) then release. The touch screen is now
initialized and will respond to anything touching it. Light finger pressure is all that’s required for
selections, care must be exercised not to damage the touch screen or display. The use of a stylus is
recommended, but not required unless finger size is a problem.
Step 2: Password Protection
The first screen that is displayed is the password screen that prompts the technician to enter a 5 digit
numeric password. The default password shipped with the unit is set to all zeros (00000). The password
is easily changed via the password configuration menu [SCREEN1F]; this will be covered in detail later.
The diagram below illustrates the basic structure of the APM’s Main Menu. Each of these menu functions
are described in detail on the following pages.
CONFIG
MENU
EXIT
CAL
MENU
ENTER CORRECT
PASSWORD
SELECT

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Calibration of the APM
Calibration Basics
Because of the wide variation of fume hood types and configurations available, it is always necessary to
perform field calibration of the APM. The purpose of field calibration is to correlate the APM’s internal
velocity sensor with a measured face velocity of the fume hood to which it is installed using a calibrated
instrument.
The APM has three different field calibration routines available; One-Point, Two-Point and Three-Point.
For most fume hood applications, the Two-Point Calibration Routine will provide the best results over the
operating range. The One-Point Calibration Routine is best suited for applications where the face velocity
is constant, such as VAV with no volume limits and no set back. The Three-Point Calibration Routine is
best suited for applications that may exhibit non-linear performance, such as custom walk-in type fume
hoods.
IMPORTANT: The following items MUST be in place prior to performing APM calibration:
The APM must be properly installed, wired and powered up for a period of 20 minutes minimum.
The room temperature must be under stable control with the nominal temperature between 68ºF and
72ºF (20ºC and 22.2ºC).
Fume hood exhaust and room supply must be under stable control, with sufficient fume hood
exhaust static pressure to achieve all design flows.
Proper instrumentation must be available for measuring face velocity. The instrument used to
measure fume hood face velocity shall be recently calibrated and capable of measuring in the range
between 40 to 400 fpm (0.2 to 2.0 m/s) with an accuracy of +/- 5% of reading.
Average face velocity measurements shall be made in accordance with methods consistent with
ANSI/ASHRAE 110-1995.
The diagram below illustrates the basic structure of the Calibration Menu Screens. Each of these menu
functions are described in detail on the following pages.
TWO-POINT
CALIBRATION
CONFIGURATION
MENU
CALIBRATION
ADJUSTMENT
ONE-POINT
CALIBRATION
EXIT
THREE-POINT
CALIBRATION
CALIBRATION MENU
SELECT

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Calibration of the APM
Two-Point Calibration Procedure
The Two-Point Calibration Procedure is recommended for most fume hood applications including
constant volume and variable volume with setback and volume limits. The Two-Point calibration
procedure requires two face velocity measurements to be taken and entered into the APM, one at a high
face velocity and another at a low face velocity. The Two-Point Calibration process will result in
correlating the internal sensor’s “offset” and “slope” to match the measured values provided.
Step 1: Enable Two-Point Calibration Mode
With the touch screen enabled and correct password entered, press CAL MENU reference [SCREEN 1]
and [SCREEN 1K]. Using the up and down arrows [ or ] select TWO-POINT CALIBRATION.
Step 2: Move Sash to Full Open (Low Velocity Point)
Following the instructions on the APM [SCREEN 2K], open the sash(es) to the full open position to achieve
a low face velocity calibration point. If the fume hood has sash stops available, defeat them and open
past the stops. The goal is to achieve the maximum operating open area of the fume hood face. Press
the screen to confirm sash is in position.
Step 3: Traverse Hood Face at Max. Open Sash (Low 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 3K].
Step 4: Enter Traversed Reading (Low Velocity Point)
Using the plus and minus signs [ +or -] on the touch screen [SCREEN 4K]; 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 now 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.
Step 5: Move Sash(es) to Min. Open Position (High Velocity Point)
Following the instructions on the APM [SCREEN 7K], move the sash(es) to a minimum working sash
position. Do NOT close the sash(es) completely. The minimum working sash height is typically 6” to
12” open (15.2 to 30.5 cm). Press the screen to confirm sash is in place.
Step 6: Traverse Hood Face at Min. Sash Position (High Velocity Point)
Perform a face velocity traverse, with a calibrated instrument, across the entire open area of the fume
hood face. Press the touch screen [SCREEN 8K] to confirm measurement is complete.
Step 7: Enter Traversed Reading (High Velocity Point)
Enter the measure value [SCREEN 9K] using the same process as described in Step 4.
Step 8: Completion of the Two-Point Calibration
The Two-Point Calibration procedure has been completed. The final screen [SCREEN 10K] in the
calibration process allows you to either EXIT or CONTINUE TO CONFIG MENU. Selecting EXIT will
return the APM to monitor mode, while depressing the CONTINUE TO CONFIG MENU option will bring
you into the configuration menu which will allow configuration of the APM.

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Calibration of the APM
Three-Point Calibration Procedure
The Three-Point Calibration Procedure is intended for “Special Application” fume hoods that are typically
difficult to calibrate using linear calibration techniques. Some examples of these special application
hoods may include large walk-in hoods and custom hoods that have been designed for specific research
or manufacturing applications.
The APM Three-Point calibration routine allows for three discrete face velocity calibration points to be
applied to the internal sensor curve which results in a non-linear correction factor that matches the hood
characteristics.
Step 1: Enable Calibration Mode
With the touch screen enabled and correct password entered, press CAL MENU, [SCREEN1]. Using the
up and down arrows [ or ] select THREE-POINT CALIBRATION, [SCREEN 1K].
Step 2: Move Sash(es) to Full Open (Low Velocity Point)
Following the instructions on the APM [SCREEN 1N], move the sash(es) to the full open position. If the
fume hood has sash stops available, defeat them and open past the stops. Press the screen.
Step 3: Traverse Hood Face at Full Open
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 2N].
Step 4: Enter Traversed Reading
Using the plus and minus signs [ +or -] on the touch screen [SCREEN 3N], 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.
Step 5: Move Sash a Mid-Open Position (Mid Velocity Point)
Following the instructions on the APM [SCREEN 4N], move the sash(es) to a mid-open position. This sash
position should be a position indicative of a half opened sash (approximately). Press the screen.
Step 6: Traverse Hood Face at Mid-Open Position (Mid 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 5N].
Step 7: Enter Traversed Reading (Mid Velocity Point)
Following the same process described in Step 4, enter the second measured face velocity value into the
APM [SCREEN 6N]. Press the ACCEPT button when finished.
Step 8: Move Sash(es) to Min. Position (High Velocity Point)
Following the instructions on the APM [SCREEN 7N], move the sash(es) to a minimum position. The
minimum sash position should be a position where the operator can still access the interior of the hood,
NOT a full closed sash position. Typically the opening is approximately 6 to 12” opened (15.2 to 30.5
cm). Again press the screen.

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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 calibration 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.

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Step 5: Completion of the One-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].

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Calibration of the APM
Manual Calibration Adjustments
An interesting feature of the APM is a Manual Calibration Function which allows adjustment of the original
calibration point(s) obtained during the one-point or two-point calibration routines. NOTE: This feature is
not intended to replace the initial calibration process that is required upon initial installation and
start-up. This function can be desirable if, for example, during a periodic hood validation, the calibration
at a high velocity is reading 6 FPM higher than the traverse. By using the manual calibration adjustment,
the high flow calibration set point can be manually offset to a value of -6 FPM to correct the error and
display the expected results. The manual calibration feature allows adjustment of the displayed readings
WITHOUT performing a full calibration routine. This function can be a real time saver during periodic
hood validation. The APM will automatically choose whether the technician can adjust one point (for a
one point calibration routine) or two points (for a two point calibration routine), this feature is not available
for a 3 point calibration.
➢Manual Calibration Adjustment for One-Point Calibration Routine
Step 1a: Enable Calibration Adjustment Mode
With the touch screen enabled and correct password entered, press CAL MENU, [SCREEN 1] or [SCREEN
1G]. Using the up and down arrows [ or ] select CALIBRATION ADJUSTMENT and press it,
[SCREEN 1K].
Step 2a: Enter in Desired Offset Value
Assuming a one point calibration was previously completed, the APM will prompt for an offset value
[SCREEN 19K]. This value will be added (or subtracted when a negative number is entered) to the
calibration point obtained when the calibration was originally performed. Using the plus and minus
buttons [ or ] enter a positive or negative offset value and press ACCEPT.
Step 3a: Verify New Reading
The next displayed screen, [SCREEN 18K], will show a face velocity reading for the given position of the
sash at that moment. It is a live reading and varying the sash position will vary the reading as expected.
If the new readings are correct as displayed, press ACCEPT, if not, press RETRY to try again or CANCEL
to quit.
➢Manual Calibration Adjustment for Two-Point Calibration Routine
Step 1b: Enable Calibration Adjustment Mode
With the touch screen enabled and correct password entered, press CAL MENU, [SCREEN 1] or [SCREEN
1G]. Using the up and down arrows [ or ] select CALIBRATION ADJUSTMENT and press it,
[SCREEN 1K].
Step 2b: Select Calibration Point to Adjust
Assuming a two point calibration was previously performed, the APM will prompt for which calibration
point to adjust [SCREEN 15K]. Select HIGH VEL. CAL POINT to adjust the value obtained when the sash
was at a minimum position, select LOW VEL. CAL POINT to adjust the value obtained when the sash was
at a full open position, or select EXIT to cancel out of this section.
Step 3b: High Velocity Calibration Point Adjustment
After selecting HIGH VEL. CAL POINT, the APM will ask for an offset value to move the calibration point
by [SCREEN 16K]. This value will be added (or subtracted when a negative number is entered) to the
calibration point obtained when the two point calibration was originally performed. Using the plus and
minus buttons [ or ] enter a positive or negative offset value and press ACCEPT.

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Calibration of the APM
Step 4b: Verify New Reading
The next displayed screen, [SCREEN 18K], will show a face velocity reading for the given position of the
sash at that moment. It is a live reading and varying the sash position will vary the reading as expected.
If the new readings for the high velocities (sash in a minimum position) are correct as displayed, press
ACCEPT, if not, press RETRY to try again or CANCEL to quit. Note: the low face velocity readings do not
change as the only adjusted point was for the high velocity readings.
Step 5b: Low Velocity Calibration Point Adjustment
After selecting LOW VEL. CAL POINT, the APM will ask for an offset value to move the calibration point
by [SCREEN 17K]. This value will be added (or subtracted when a negative number is entered) to the
calibration point obtained when the two point calibration was originally performed. Using the plus and
minus buttons [ or ] enter a positive or negative offset value and press ACCEPT.
Step 6b: Verify New Reading
The next displayed screen, [SCREEN 18K], will show a face velocity reading for the given position of the
sash at that moment. It is a live reading and varying the sash position will vary the reading as expected.
If the new readings for the low velocities (sash in a full open position) are correct as displayed, press
ACCEPT, if not, press RETRY to try again or CANCEL to quit. Note: the high face velocity readings do
not change as the only adjusted point was for the low velocity readings.
Step 7b: Exiting Out of the Calibration Adjustment Menu
On the TWO POINT CALIBRATION ADJUSTMENT main screen, [SCREEN 15K] select EXIT to go back to the
CALIBRATION MAIN MENU, [SCREEN 1K].

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Configuration of the APM
The Apex Premier Monitor can be easily configured to adapt to a wide variety of applications. Many
functions of the APM are selectable and can be disabled when not required. This section will discuss all
of the configurable functions of the APM. The diagram below illustrates the basic structure of the
Configuration Menu Screens. Each of these menu functions are described in detail on the following
pages.
DISPLAY
ANALOG OUTPUTS
RELAY OUTPUTS
DIGITAL INPUTS
CONTRAST ADJUST
ALARMS
CHANGE
PASSWORD
HORN, MUTE AND
PURGE BUTTONS
CALIBRATION MENU
RESTORE ALL
FACTORY DEFAULTS
EXIT
CONFIGURATION
MENU
SELECT