SKC 303 Film Flowmeter - Manual (Page 2)

Connecting the Pump
Note: If the pump to be calibrated draws air, connect it to the rubber tubing on the fl owmeter’s
top rubber stopper. If the pump blows air, use rubber tubing to connect it to the lower side
arm near the base of the fl owmeter.
1. Remove the rubber cap from the side arm inlet near the base of the fl owmeter.
2. Using rubber tubing, connect one end to the appropriate port on the fl owmeter and the
other end to the inlet of the sampling medium to be used (if applicable).
3. Using fl exible tubing, connect the outlet of the sampling medium to the inlet of the
pump.
Measuring the Flow
1. Turn on the pump.
2. Squeeze the rubber bulb on the fl owmeter to force the liquid above the inlet. Bubbles
(fi lm) will form.
3. Using a stopwatch, start timing the fi lm as it passes the zero line and stop timing as the
bubble reaches the 100 ml line. For best results, form several bubbles, fi ve to six seconds
apart, and time the last bubble.
Caution: Do not squeeze the bulb continuously. This causes froth to form on the walls mak-
ing timing diffi
cult.
The fl ow rate can be determined from the Flow Chart on the back page, or calculated using
the following equation:
Flow (ml/min) = 60 x (volume traveled)
Time (in seconds)
Outlet
(upper
port)
Inlet (lower
side arm port)
Pump
inlet
Calibration
chamber
Tygon
tubing
Sample
pump
Flowmeter
Rubber
tubing
Sample
media
outlet
Inlet