Specifications

Instruction 0024-9395
47
Fyrite Pro
5.7 Draft Calibration (Model 105/125)
Material Required: • Bellows
• Micromanometer
Range: ±8 in. H
2
O column (±20 mb)
Accuracy: ±0.01 in. H
2
O column (±20 mb)
Procedure:
1. Set the draft units to “WC” per Section 3.5.4.
2. Enter the Calibrate Mode per Section 5.1, and then
press the ENTER button until “WC” is displayed.
3. If necessary, zero the draft channel by using the ▲
and ▼ buttons to adjust the reading to 0.00 ±0.02.
4. Set up the analyzer and its test equipment per Figure 5-2.
5. Use the bellows to apply a positive pressure of 4.00 in. H
2
O, and then use
the ▲ and ▼ buttons to adjust the displayed value to match the
reading on the manometer.
6. Remove pressure and repeat Steps 3 thru 5 until the desired read-
ings are obtained.
7. Press ENTER to store the new calibration values and move to the
next calibration screen, or hold down ENTER for 2 seconds to store
the new calibration values and enter the Run Mode, or press the
I/O button to exit the Calibration Mode and turn OFF the analyzer
without saving the changes.
Figure 5-2. Draft Calibration Equipment
.
1
2
3
1
Manometer
Bellows
Parts Shown:
1. Tubing*
2. Tee*
3. Fitting, “+” Pressure Port
* Contained in Calibration Kit