Manual

Storage or Transport

Disconnect the pump and replace the rubber cap on the lower inlet of the ﬂ owmeter. The

instrument can be placed in any position without solution loss. SKC recommends that it be

transported in its case.

Volumetric Calibration of Hand Pumps

SKC Model 303 Flowmeter can be used to determine the volume of manual hand pumps such

as the bellows or piston pumps used with detector tubes. Follow these procedures:

Bellows Pumps (i.e., Dräger

)

1. Connect a detector tube to the pump according to the manufacturer’s instructions.

2. Connect the inlet of the tube to the rubber hose on top of the ﬂ owmeter.

3. Compress the bellows pump and release slowly. Squeeze the rubber bulb on the ﬂ ow-

meter. Bubbles (ﬁ lm) will begin to form.

4. When the ﬁ lm reaches the zero line on the ﬂ owmeter, compress the bellows pump com-

pletely and release. The ﬁ lm will move up the ﬂ owmeter and stop when the bellows

pump is ﬁ lled to capacity.

5. Record the point at which the ﬁ lm stops. Most bellows pumps are designed to draw

100 ml. Lines on the ﬂ owmeter are graduated at 90, 95, 100, 105, and 110 ml. Visually

extrapolate the volume reading if the ﬁ lm stops between lines.

6. Calculate and record the volume.

Note: Pumps should be repaired if they fall outside of the 90 to 110 ml range.

Piston Pumps (i.e., Gastec

, MSA, Kitagawa)

1. Connect a standard detector tube to the piston pump according to the manufacturer’s

instructions.

2. Connect the inlet of the tube to the rubber hose on top of the ﬁ lm ﬂ owmeter.

3. While pulling the piston slowly back, squeeze the rubber bulb on the ﬂ owmeter until

bubbles (ﬁ lm) form.

4. Watch the ﬁ lm movement closely. When the ﬁ lm is exactly at the zero line on the ﬂ ow-

meter, push the pump piston all the way in. Then, draw the piston out to full capacity

and lock it in place. The ﬁ lm will move up the ﬂ owmeter and stop when the piston

pump is ﬁ lled to capacity.

5. Record the point at which the ﬁ lm stops. Most piston pumps are designed to draw

100 ml. Lines on the ﬂ owmeter are graduated at 90, 95, 100, 105, and 110 ml. Visually

extrapolate the volume reading if the ﬁ lm stops between lines.

6. Calculate and record the volume.

Note: Pumps should be repaired if they fall outside the 90 to 110 ml range.

SKC Limited Warranty and Return Policy

SKC products are subject to the SKC Limited Warranty and Return Policy, which provides

SKC’s sole liability and the buyer’s exclusive remedy. To view the complete SKC Limited

Warranty and Return Policy, go to h p://www.skcinc.com/warranty.asp.