DigitalFlow™ GF868 Startup Guide (1 and 2-Channel) 23
Chapter 2. Initial Setup
2.4 Activating a Channel
The ACTIV submenu permits selection of the desired measurement method. In addition, it is used to activate/deactivate
one or both of the channels in a 2-Channel Model GF868.
2.4.1 1-Channel Meter
1. Enter the ACTIV submenu by pressing [F1] at the User PROGRAM prompt.
2. Press [F1] to activate the channel in BURST mode.
2.4.2 2-Channel Meter
1. Enter the ACTIV submenu by pressing [F1] at the Channel PROGRAM prompt.
2. Press [F1] (OFF) to deactivate the channel and return to the Channel PROGRAM prompt, or press [F2] to activate the
channel in BURST mode.
2.4.3 1 and 2-Channel Meters
3. Press [F1] to select Skan mode or [F2] to select Skan/Measure mode. The meter will exit the ACTIV submenu and
return to the channel menu screen.
As indicated in the above prompt, the Model GF868 flowmeter can take measurements in two different ways
Skan is a low resolution technique for locating the acoustic signal and for high velocity measurements. It is more
robust in a noisy environment than the Measure technique.
Measure is a more precise technique best used for low velocity measurements.
If Skan is selected at the next prompt, the instrument uses this technique exclusively. However, if S/M is selected, the
meter uses Skan to find the acoustic signal and then tries to use the Measure technique for a more precise measurement.
Proceed directly to the next section to program the SYSTM submenu.
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