Specifications

3. OPERATION

To go to a DISPLAY other than RATE, press [DISPLAY] and make a new

DISPLAY choice.

3.4.6.2 <2AVG> (AVERAGE)

 PURPOSE

To activate the AVERAGE DISPLAY and/or adjust the period of time over which

averaging occurs.

See Section 3.4.6, PRINCIPLE.

 OPERATION

To access the AVERAGE DISPLAY, press [DISPLAY] and select <2avg>.

The display is:

1. Edit field for averaging period in seconds.

Default is 20. Minimum 3, maximum 999.

Averaging Period:

20 s

Edit the averaging time period if desired. Pressing [ENTER] returns to the MAIN

run screen with the AVERAGE DISPLAY active.

With the AVERAGE DISPLAY active the MAIN run screen is:

1. Average flow measured over last completed

averaging period.

2. Standard deviation of last completed

averaging period.

3. Countdown in seconds until completion of on-

going averaging period.

* 101.99 sccm N20

δ 0.06 18 sec

The AVERAGE DISPLAY has a second screen that allows the instantaneous

flow readings to be viewed while an averaging cycle is running. Pressing [+/-]

toggles between the MAIN run AVERAGE screen and the instantaneous values

AVERAGE screen. The instantaneous AVERAGE screen is:

1. Instantaneous flow value at molbox RFM’s

normal integration rate.

2. Countdown in seconds until completion of on-

going averaging period.

3. Current rate of change of flow in flow unit of

measure/second..

* 101.59 sccm N20

R 0.0025 18 sec