skcinc.com
Form 37165 Rev 200217
Page 7
Setting/Calibrating Flow Rate from 5 to 500 ml/min
•
Allow pump to equilibrate after moving it from one temperature extreme to another.
•
Charge pump battery completely before calibration and sampling.
•
Single-tube sampling requires All-in-One adjustable tube holder; see All-in-One operating instructions for
details on operation.
•
Multiple-tube sampling requires Constant Pressure Controller (CPC) and Dual, Tri, or Quad Adjustable Low
Flow Tube Holder accessory; see CPC and Adjustable Low Flow Tube Holder operating instructions for
details on operation.
•
Calibrate/verify pump flow rate before and after each sampling operation using the tube holder and pump to
be used for sampling.
•
To achieve the best results, run the pump for 10 to 15 minutes before calibration.
Prepare the Sorbent Tube(s)
1. Determine the number and type of sorbent tubes needed for pre-sample calibration and sampling.
2. Break tips off representative sorbent tubes for pre-sample calibration.
3. If performing multiple-tube sampling, label tubes.
Prepare the Pump
1. Turn on the pump using the on/off button. If necessary, reset the timer by touching and holding PUMP on
the screen touch keypad.
2. After preparing the calibrator (see calibrator instructions), use flexible tubing to connect the calibrator outlet
(suction port) to the pump inlet.
3. Set pump flow rate using the up and down arrow keys on the set/calibrate flow screen to increase or
decrease flow:
a.
Single-tube sampling
—
1.5 L/min.
b.
Multiple-tube sampling
—
the
sum of all flows + 15%.
Note
: Do not exceed 500 ml/min flow rate
per tube for multiple-tube sampling.
4. Disconnect the tubing from the pump inlet.
Prepare the All-in-One Adjustable Tube Holder (single-tube sampling)
1. On the tube holder, insert an opened representative tube (arrow on tube
pointing toward the pump) into the rubber sleeve on the port.
See Figure 4.
2. Use a small flat-head screwdriver to turn counterclockwise the brass flow
adjust screw directly beneath the port.
Prepare the Dual, Tri, or Quad Adjustable Low Flow Tube Holder (multiple-tube sampling)
1.
On the tube holder, insert an opened representative tube (arrow on tube pointing toward the pump) into the
rubber sleeve on the port. Repeat for the desired number of tube samples.
See Figure 5
. Place an unopened (inactive) tube in any unused port to “seal”
it.
2.
Label ports on the adjustable tube holder to match the tube labels.
3.
Use a small flat-head screwdriver to turn counterclockwise the brass flow
adjust screw directly beneath the port holding the first active tube to be
calibrated.
Set Up the Calibration Train (Figures 4 and 5)
Connect the calibrator to the single sorbent tube or the first of multiple sorbent tubes.
