Installation and Operating Instructions
VOC Room Sensor in the BAPI-Stat 3 Enclosure
with Differential Ground Configuration
Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA
Tel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:[email protected] • Web:www.bapihvac.com
Specifications subject to change without notice.
29156_ins_voc_room_dif_gnd
7 of 8
rev. 06/05/18
Optional Sensor Performance Verification and Commissioning continued...
2. Apply Verification Stimulus
A. Apply the stimulus gas during the first minute after the sensor illuminates the ON icon (See Stimulus Preparation and
Application).
B. Read and record the VOC output voltage or Main LCD display approximately 2 to 4 minutes following the stimulus
gas application to determine the dynamic range measurement. (Dynamic Range Estimate period in figure 19)
C. When the dynamic range estimate period is complete the ON icon will be extinguished.
3. Termination of Verification Mode
A. For the last 7 minutes of the start-up period the sensor adapts to its ambient environment. The VOC sensor will
maintain its output voltage at 450 ppm CO2 equivalent. Display units will show 450 ppm equivalents.
B. At 15 minutes the VOC sensor will terminate the start-up period and begin normal operation.
C. The VOC output will now report the VOCs present as CO2 equivalents.
4. Result Analysis and Recommendations
A. The VOC algorithm requires a dynamic range of greater than 30% for proper operation. Sensors reporting a
dynamic range of 30% or less should be considered for replacement. (See Fig 21)
Place 50ml of 70% minimum Isopropyl Alcohol (customer supplied) into a 200ml glass bottle (2oz in an 8oz glass bottle)
with stopper and allow to reach room temperature (65° to 80°F, 18° to 27°C), a minimum of 15 minutes.
1. Using a medical grade syringe, remove the stopper from the alcohol bottle, place the tip of the syringe at least half-way
into the bottle and withdraw a 60 ml sample of the ALCOHOL VAPOR. (NO LIQUID)
2. Replace the stopper on the alcohol bottle.
3. Place the end of the syringe -
A. Over, or into the top ventilation slot of the VOC monitor’s housing for room versions.
B. Into a knockout opening or directly into the aspiration probe’s top hole for duct mount versions.
4. Empty the syringe into the sensor using one continuous motion.
Stimulus Preparation and Application
Fig 20:
Alcohol Bottle
and Syringe
Fig 21:
Acceptable Dynamic Range Output
