Flow Check; Flow Calibration - Thermo Scientific TVA2020 Instruction Manual

Flow Check

Flow Calibration

Thermo Fisher Scientific
Use the following procedure to check flow.
1. Attach a flow meter capable of reading a least 2 LPM to the probe inlet.
2. Place the instrument in the RUN mode. From the MAIN MENU,
press 1=Run.
Note The dynamic flow control is only active in the Run, Span or Zero
modes. ▲
3. The flow should read between 1.050 LPM and 0.950 LPM.
4. Attach one of the red flow restrictors between the flow meter and the
probe inlet. The flow should drop to 0.80 to 0.85 LPM and slowly
climb to 1.05 to 0.950 LPM within 1-2 minutes.
5. Attach a second flow restrictor in line with the first between the flow
meter and the probe inlet. The flow should drop to 0.80 to 0.85 LPM
and slowly climb to 1.05 to 0.950 LPM within 1-2 minutes.
Note If the pump has been serviced the actual flows may be different than
above. In this case a flow calibration should be performed.
Use the following procedure to perform a flow calibration.
1. Confirm that the instrument passes the
to performing this calibration. A new water trap filter and a new or
clean sintered metal filter should be installed prior to performing this
calibration.
2. From the SETUP MENU, choose 1=Calib > 5=Flow.
3. Establish the 1 ±.01 LPM flow at the probe inlet.
a. Typical values are 50-60% power with 28K-30K counts.
4. Press Enter=Accept to save the Flow 1 values.
▲
Leak Check on page 7-16
TVA2020 Instruction Manual
Servicing
Flow Check
prior
7-17