Chapter 6: Maintaining your XPert or XVS Enclosure
Product Service 1-800-522-7658
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Guardian Jr. Calibration Procedure
Each Guardian Jr., alarm module and enclosure is unique and needs to be
individually calibrated in the field. The procedure for the adjustment is as
follows:
1. Double check the installation to make sure that monitor and power
supply is properly installed.
2. Allow 10 minutes for the monitor to warm up once power has been
connected.
3. Determine the low flow set point for your monitor. This is the value
where the monitor will first indicate a low flow condition. The red
light will be on for this value. Refer to your industrial hygiene officer
for the proper low flow set point or consult the table to follow.
4. Adjust your enclosure airflow to the low flow set point as previously
determined. The exhaust flow can be lowered by adjusting the speed
control on the FilterMate or by using an adjustable damper on the
exhaust blower. Typical alarm conditions are set at face velocities of
10 to 20 feet per minute below the normal operating conditions due to
supply air and exhaust air fluctuations, as well as room air cross
drafts.
5. Using a properly calibrated thermo anemometer, determine the
velocity through the face of the enclosure by taking a detailed velocity
traverse. Divide the face area into equal increments. One reading per
square foot of face area is normally recommended for an accurate
traverse. Compute the average velocity for this area.
6. If the red light alarm is on, slowly turn the adjustment screw
counterclockwise until the green light is activated. If the green light
is on, slowly turn the adjustment screw clockwise until the red light
comes on. Slowly turn the adjustment screw back until the red light is
activated. It is important that these adjustments be done in small
increments, at intervals about 10 seconds apart to allow for delayed
reaction of the alarm itself. The alarm low flow set point should now
be set and the red light activated.
7. Readjust the enclosure airflow to its normal operating levels. The
green light should now be activated.
8. Calibration is now complete.
Summary of Contents for Protector XVS Series
Page 49: ...Chapter 7 Accessorizing your XPert or XVS Enclosure Product Service 1 800 522 7658 45...
Page 54: ...Appendix A Replacement Parts Product Service 1 800 522 7658 50...
Page 56: ...Appendix B Dimensions Product Service 1 800 522 7658 52 2 3 and 4 Units...
Page 57: ...Appendix B Dimensions Product Service 1 800 522 7658 53 2 3 and 4 Units...
Page 58: ...Appendix B Dimensions Product Service 1 800 522 7658 54...
