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TE-WILBUR OPERATIONS MANUAL REV 002.15 06/11/2015
Tisch Environmental 1-TSP-AND-PM10 sales@tisch-env.com www.tisch-env.com Page 63 of 183
Rewriting:
=  .  (+.
)
Where: Qa is the flow in Lpm, Ta is ambient temperature in Degrees Celsius
and Pa is ambient barometric pressure in millimeters of mercury.
7.5 Flow Calibration
Flow calibration is performed using a four-point linear regression formula.
Four points of flow are generated at 90% / 95% / 100% / 105% of setpoint.
When flow calibration is started, the system automatically will start the flow
system and will achieve each setpoint, allowing the user to enter the
calibrator’s flow reading at each step.
To calibrate the flow system, perform the following:
1. Flow calibration can be performed by following these keystrokes:
MAIN MENU
CALIBRATION
FLOW CALIBRATION
2. Place a known, calibrated flow standard onto the downtube of the TE-
Wilbur unit such as the Tisch FRM-CAL low volume calibrator. This
calibrator should be within its certification period.
Picture showing the TE-FRM-CAL
calibration head inserted onto downtube
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