Casella CEL Sampling heads for personal dust sampling - Manual (Page 15)

6 CALIBRATION
6.1 Calibration at High Flow
(Sampling Heads for Particulates)
6.1.1 Calibration at High Flow Using a Rotameter
Attach the sampling head and Rotameter to the inlet nozzle of an Apex
personal sampling pump to measure the actual flow as shown in Figure 12.
1. Start the Apex unit and wait for it to enter Hold Mode
2. Press or several times until FLOW SEt blinks on the
display.
3. Press to select it.
3. Use and to set the flow required for calibration.
As a general rule, the pump should be calibrated to the flow required
for the proposed task.
4. Press to accept the setting. The pump will start.
5. As soon as CAL SEt is displayed, use and to adjust the
flow being measured by the Rotameter to match the required
calibration point.
6. When the flow rate is acceptable, press to accept the value and
return to Hold Mode.
This calibration will be saved and used by the Apex unit in all future
samples made at this flow.
PROG.
SET FLO
o C
L/min
RESET
CAL I.R.
TEMP 19.48
2.5
02023
Clamp
Clamping Studs
Apex Pump
Flow
Rotameter Float
(Read flow rate
from the top of
the float)
lowmeter Stand
Rotameter Tube
Sampling Head
Connecting Hose
(5 mm nominal
internal dia.)
Figure 12: Arrangement for calibration using a Rotameter and Apex Pump
Calibration
Page 15 of 24
SAMPLING HEADS AND ACCESSORIES
Users Guide