Product Support

Troubleshooting the FS1650 Alarm

If the FS1650 alarm is not operating properly, please use the following tips to identify and resolve the issue(s):

  1. At Start up, LED “GREEN”, audible alarm constantly on

2. Face velocity good, alarm LED “RED”, audible alarm continuously on

3. Face velocity good, alarm LED “RED”, audible alarm intermittent

4. Face velocity bad, alarm LED “GREEN”, no audible alarm

5. Alarm is not turning on, NO “GREEN” OR “RED” light indication.

6. Face velocity good, alarm LED “GREEN, audible alarm continuously on

NOTES

  1. A quick visual check may be performed to verify that the thermistors are not broken or shorted. This is the most common with the center measuring thermistor. It may become broken from damage that occurred during installation or cleaning. Due to its small size and sensitivity, the wires connecting it to the sensor’s PCB can become broken or bent. If the measuring thermistor has a broken wire, this will result in an open circuit. Either condition will cause a continuous alarm.
  2. Establishing the appropriate face velocity is one of the most important factors in the overall performance of the enclosure. Most vented enclosures from Flow Sciences are designed to operate with a face velocity of between 60 and 100 lfpm (0.3 – 0.5 m/s) and a recommended face velocity of 75 lfpm ± 5 lfpm (0.38 ± 0.02 m/s).

 

Flow Sciences recommends the face velocity alarm be set at 20% below the operational face velocity. Therefore, if 75 lfpm (0.38 m/s) is the desired velocity, the alarm should be set to activate at velocities below 60 lfpm.

Begin alarm calibration by first setting face velocity to desired alarm activation velocity.  Remove the four screws located on the face of the alarm. Next, set the delay to desired time by adjusting the delay screw.  Flow Sciences recommends setting this all the way to the right (30 seconds) so quick disturbances in the face velocity will not trigger the alarm.  Adjust the set point screw (shown in the image below), until the RED and GREEN lights toggle between each other. This sets the alarm so that a consistent (30 seconds) face velocity of, for example, less than 60 lfpm (0.3 m/s) will trigger the alarm.

3. If this guide suggested a replacement or your issue(s) remain unresolved, please call our office at (800) 849-3426 and ask for Technical Support. If the issue is not urgent, you may alternatively send an email to customersupport@flowsciences.com.

 

Sensor appearance

A quick visual check may be performed to verify that the thermisters are not broken or shorted.  This is most common with the center measuring thermister.  It may be become broken from damage that occurred during installation or cleaning.  Due to its small size and sensitivity, the wires connecting it to the sensor’s PCB can become broken or bent.  If the measuring thermister has a broken wire, this will result in an open circuit.  If the wires beneath the bead are touching, this will result in a shorted circuit.  Either condition will cause a continuous alarm.

Sensor Measurement

If an electrical multi-meter is available, initial resistance can be measured to give an indication of the integrity of the thermister.  When checking the thermister, remember that the meter is applying current through the components and resistance values will change as it heats up (*sensor must acclimatize to room temperature before proper function can be achieved*).  One needs to note only the initial value for this test.  Values for the thermisters are as follow:

Reference Thermister – 115k Ohms (95K – 120K possible range)

Measuring Thermister – 5K Ohms (4.5K – 7K possible range)

Cameron Faulconer is an Industrial Hygienist with a wide breadth of experience, spanning between commercial manufacturing, to home residences. His inspiration for his choice of career is communicating the value of preserving the health and safety of employees using the most effective and efficient means possible. Therefore, Mr. Faulconer found his place in the “Engineering Controls” rung of the hierarchy of hazard controls.

As a problem solver, Mr. Faulconer believes that the best safety solutions are created through consultative conversations with those who seek solutions. He believes communicating information derived from these conversations to be critical to the continued understanding of the toxicological impacts of the work environment.

His personal motto is “protecting the safety and health of employees from what can and cannot be seen with the naked eye”.


FINDING LEGACY PRODUCT

LOOKING FOR INFORMATION ABOUT YOUR 2000 or 3000 SERIES FLOW SCIENCES ENCLOSURE (VBSE)?  LOOK AT THE SERIAL TAG ON THE BACK LEFT OUTSIDE WALL OF YOUR VBSE.

GO TO OUR WEBSITE:  www.flowsciences.com  In the search field, type in VBSE or, click HERE

 

CLICK VBSE-VENTED BALANCE SAFETY ENCLOSURE.  CLICK AVAILABLE DIMENSIONS.   IN THE SEARCH FIELD type in your model number for example, FS2010, or FS3000, or FS2020, etc.

 

The current model number using EVA will show the corresponding Legacy Code, 2000/3000 series model number and a link to the specifications.

 

If you have any issues, please do not hesitate to ASK ROBIN.


Top Mount BIBO Housing Upgrade

FLOW SCIENCES NOW INCLUDES A DIFFERENTIAL PRESSURE GAUGE, WITH READOUTS IN EITHER INCHES OR PASCALS, INSTALLED ON ALL OF OUR TOP MOUNT BIBO (BAGIN/BAGOUT) HEPA FILTER ENCLOSURES.

 

WHEN THE ENCLOSURE IS FIRST SET UP AND CERTIFIED FOR USE, TAKE THE READING ON THE GAUGE AND RECORD IT.  WHEN THIS READING DOUBLES, IT IS TIME TO CHANGE THE FILTER.


Top Mount Fan Housing Replacement

When a top mount fan housing system needs the filters replaced, we need the serial number off the silver serial tag located on the left clear acrylic side wall of the enclosure—not the serial number located on the top mount fan.  Here is an example.

 

This number will tell us when the unit was built and refer to the original order so we can look at the order for a list of items shipped.

 


Filter Replacement

A CUSTOMER RECENTLY ASKED FOR A FILTER TO GO INSIDE HIS FS4000SS (FAN/FILTER HOUSING).   HOWEVER HE DID NOT SAY WHAT WILL BE FILTERED, POWDER (PARTICULATES) OR A VAPOR (SOLVENT, ACID/GAS, ETC.)

 

WE OFFER SEVERAL FILTERS THAT FIT IN THE FS4000SS, AND NEED TO KNOW WHAT THE OPERATOR IS WORKING WITH SO THAT THE CORRECT FILTER WILL BE RECOMMENDED.

 

KEEP IN MIND THAT OUR TOP MOUNT HEPA FILTERS COME IN DIFFERENT SIZES.  WE CAN BEST HELP, IF WE KNOW THE MODEL AND SERIAL NUMBER OF THE ENCLOSURE WHICH IS LOCATED ON THE LEFT SIDE ACRYLIC WALL.

 

 

Also, you can refer to the below chart:

 

Single HEPA Top Mount Units

Enclosure Part # Replacement Filter (Our Part #) Filter Part # From Vendor Fan Part # & Size
FS10200

ETA243024AAA

FS4125 C-2094 OR C-8277 4710-18X22
FS10201

ETA242424AAA

FS4155

FS4125

C-1743 OR C-8251

C-2094 OR C-8277

4720-24X14

4710-18X22

FS10300

ETA363024AAA

FS4135 C-1744 OR C-8252 4710-18X30

 

FS10301

ETA362424AAA

FS4155 C-1743 OR C-8251 4720-24X14

 

FS10325P

ETA362424AAA1

FS4135 C-1744 OR C-8252 4710-18X30
FS10400

ETA483024AAA

FS4145 C-2049 or C-8253 4720-18x36
FS10401

ETA482424AAA

FS4145 C-2049 OR C-8253 4720-18X36
FS10425P

ETA482424AAA1

FS4145 C-2049 OR C-8253 4720-18X36
FS10435P

ETA483027AAA1

FS4145 C-2049 OR C-8253 4720-18X36
FS10445P FS4145 C-2049 OR C-8253 4720-18X36
FS10450

ETA483024BAA

FS4145 C-2049 OR C-8253 4720-18X36
FS10500

ETA603027AAA

FS4155 (NEED 2) C-1743 OR C-8251 4720-24X14 (2)
FS10550

ETA603027BAA

FS4155 (NEED 2) C-1743 OR C-8251 4720-24X14 (2)
FS10600

ETA723027AAA

FS4155 (NEED 2) C-1743 OR C-8251 4720-24X14 (2)
FS10650

ETA723027BAA

FS4155 (NEED 2) C-1743 OR C-8251 4720-24X14 (2)

 

Double HEPA Top Mount Units

Enclosure Part # Replacement Filter (Our Part #) Filter Part # From Vendor Fan Part # & Size
FS11300

ETA363024ABA

FS4165 (PRIMARY)

FS4135 (SECONDARY)

C-1744 OR C-8252 4710-18X30
FS11301

ETA362424ABA

FS4185 (PRIMARY)

FS4155 (SECONDARY)

C-1743 OR C-8251 4720-24X14
FS11400

ETA483024ABA

FS4175 (PRIMARY)

FS4145 (SECONDARY)

C-2049 OR C-8253 4720-18X36
FS11401

ETA482424ABA

FS4175 (PRIMARY)

FS4145 (SECONDARY)

C-2049 OR C-8253 4720-18X36
FS11450

ETA483024BBA

FS4175 (PRIMARY)

FS4145 (SECONDARY)

C-2049 OR C-8253 4720-18X36
FS11500

ETA603027ABA

FS4185 (PRIMARY)

FS4155 (SECONDARY)

C-1743 OR C-8251 4720-24X14
FS11550

ETA603027BBA

FS4185 (PRIMARY)

FS4155 (SECONDARY)

C-1743 OR C-8251 4720-24X14
FS11600

ETA723027ABA

FS4185 (PRIMARY)

FS4155 (SECONDARY)

C-1743 OR C-8251 4720-24X14
FS11650

ETA723027BBA

FS4185 (PRIMARY)

FS4155 (SECONDARY)

C-1743 OR C-8251 4720-24X14

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Finding the Enclosure Model/Serial Number

To best help customers answer any questions about their Flow Sciences enclosure, we need to know the model number. 

 

90% of the time, people that call in give us the incorrect model or serial number.  The correct place to look is on the left side wall of the enclosure near the back lower corner.  As you can see on the example here, the product description, model number, sales order/work order number and serial number are on the silver serial tag. 

 

A good recommendation is to record the serial tag information where you can easily access it for future reference.  This is especially helpful if your enclosure is going to be placed up against a wall where it will be difficult to see the back left lower outside corner after it has been installed.

 

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Air Flow Requirements

FACE VELOCITY ALARMS ARE SENT WITH EACH OF OUR ENCLOSURES.  THESE ALARMS WORK LIKE A HOTWIRE ANEMOMETER TO MEASURE AIR FLOW IN THE PLANE OF THE FRONT OPENING  OF THE ENCLOSURE (IN MOST CASES, WHERE YOU PUT YOUR HANDS IN BELOW THE DOOR.)  THIS SAFETY FEATURE ASSURES THE OPERATOR IS WORKING WITHIN THE RECOMMENDED RANGE.

 

OFTEN, WE RECEIVE CALLS STATING THAT THE ALARM IS ALARMING ALL THE TIME, SO THEY HAVE UNPLUGGED IT.  A COMMON CAUSE IS THE ALARM WAS NEVER CALIBRATED. 

 

A QUALIFIED TECHNICIAN USES AN ANEMOMETER TO SET AIR FLOW AND CALIBRATE THE ALARM.  THERE ARE 4 SCREWS HOLDING THE FACE PLATE ON THE ALARM THAT HAVE TO BE REMOVED.  UNDER THE FACEPLATE, THERE IS A CIRCUIT BOARD WHICH HAS A SET BUTTON AND A DELAY BUTTON.  THE SET BUTTON IS FOR THE LOW AIR FLOW POINT.  (IF AIR FLOW DROPS BELOW THIS POINT, THE ALARM WILL SOUND INDICATING IT MAY BE TIME TO CHANGE THE FITLER.)  ONCE THE SET POINT IS ESTABLISHED, THE DELAY POINT SHOULD BE TURNED OUT TO THE FULL 30 SECONDS.  THIS ALLOWS THE USER TIME TO OPEN THE DOOR TO PUT EQUIPMENT IN OR TAKE IT OUT WITHOUT HAVING TO HEAR THE ALARM.  ONCE THE SET POINT AND DELAY POINT ARE SET, REPLACE THE COVER ON THE ALARM.  THEN THE AIR FLOW SHOULD BE INCREASED FOR THE OPERATION POINT.  OPTIMAL PERFORMANCE IS 75 FEET PER MINUTE, PLUS OR MINUS 5, FOR OPERATION.

 

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Replacement Airfoils

Robin, we need quote for replacement arm rests/bottom air foil for two Flow Sciences hoods. The arm rests measure 19.5 inches long by about 2.75 inches wide with curved surface.

 

In 2004 air foils were added to our enclosure to improve air flow.  In an effort to keep the cost to our customers as low as possible, the air foils were made of acrylic.  Later this was upgraded to anodized aluminum as we received many calls of users using the acrylic ones as “arm rests”.  This was never the purpose of the air foil.

We have retrofit kits for all units, but need the model and serial number off the left side wall of the enclosure just above the base of the unit.

 

Replacing the broken acrylic air foil with the anodized aluminum air foil is not difficult because we designed a “groove” under the air foil that slides over the  stand offs.  

Moral of the story, the airfoils are not armrests.  If you do break an airfoil, please have the serial number and measurements ready when you order a new one.  Don’t forget, you can always Ask Robin.

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Enclosure Install

Robin, we are ready to install our new Flow Sciences enclosure.  Is this a service that your company provides, or is this something we can do?

 

After he gave me the model number for a CQ, I looked at the drawing and it is a standard Bulk Powder Enclosure with a 22” cut out in the base. 

 

I told the gentleman that our enclosure systems are not difficult to put together, and to please locate the installation manuals with the enclosure.  We then briefly went through the process over the phone.  He was looking at the unit as I went through the process and from time to time acknowledged he was looking at the part I was discussing.  After the conversation, he said I think we can do this and I said to please call and ask for me if he has any questions.

 

Moral of the story, if you are having an issue setting up the enclosure, don't go at it alone.  We are here to help and are happy to answer any questions you have.  Don't forget, you can always Ask Robin.

 

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