MeasurNg Co; MeasurNg Draft - Bacharach 100 Operation & Maintenance Manual

4.1.2 Measuring CO
1. Turn ON the analyzer and allow t to warm-up per Secton 4.1.1.
Important: If the CO channel is set up for auto zero, then
the analyzer must be turned ON in fresh air; otherwise,
incorrect CO readings will occur. Refer to Section 3.5.3.
When the CO channel is set up for manual zero, and if the
CO reading is higher than zero when sampling fresh air, then
manually zero the CO channel per Section 5.6, Steps 1 thru 4.
2. For the Model 100/105, the CO Screen should already be dsplayed. For
the Model 120/125, push eNTeR untl the CO & O
3. Insert the analyzer's probe nto the area to be tested and observe
the detected CO level on the LCD.
4.1.3 Measuring Draft
1. Turn ON the analyzer and allow t to warm-up per Secton 4.1.1.
2. For the Model 105, the CO & Draft Screen should already be ds-
played. For the Model 125, press eNTeR and then press the  or 
button as necessary to dsplay ths screen.
3. The draft readng should be zero when samplng room ar. If not,
press the  button once to dsplay the Draft Zero Screen, and then
press the eNTeR button to zero the draft channel to ambent atmo-
spherc condtons.
4. Insert the analyzer's probe nto the area to be tested and observe
the draft readng on the LCD.
18
(Model 100/105/120/125)
Model 100
Fyrite Pro
Model 105
(Model 105/125)
Screen appears.
2
Model 120/125
Instruction 24-9395