G 120 II V
Page 60
1st Edition, Rev. 0 Chg. 2
is suggested that it be copied, placed in a protective folder and kept with the unit to record the adjusted
operating hours. An example of how this form is used is shown in Figure 4-5.
4.1.7.1
Calculating the Maximum Cartridge Operating Hours
1. From the purification system data plate (See Figure 4-3) on the purification chamber determine the
Air Processed (cu.ft.)
2. From the paragraph titled Compressor Specifications in the instruction manual for your compressor
unit determine the Charging Rate in SCFM of your compressor.
3. Divide the Air Processed by the Charging Rate to obtain the Maximum Operating Time in minutes
4. Divide the Maximum Operating Time in minutes by 60 to obtain the Maximum Operating Hours.
5. Record the answer on the Air Purification Cartridge Operating Hours form.
4.1.7.2
Calculating the Adjusted Cartridge Operating Hours
1. Using the Air Purification Cartridge Operating Hours form (FORM-0018) record the Date, Operat-
ing Hours and Ambient Air Temperature plus 18 °F.
2. Using either the graph or the chart in Figure 4-4 determine the Correction Factor.
3. Divide the Operating Hours by the Correction Factor and record it under the column labeled Today.
4. Add the hours recorded in Today to the previous Total and record it as the current Total.
5. When the Total approaches the Maximum Operating Hours replace the Cartridges.
