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Entering the Zero Cutoff
Value [CHx-I/O Menu]
Activating Mass Flow
Programming Site Data
Near a zero flow rate, the AT868 readings may fluctuate due to small
offsets caused by thermal drift or similar factors. To force a zero
display reading when there is minimal flow, enter a zero cutoff value
as described below (see Figure A-1 on page A-1):
1. Press [ESC] , [ENTER] , [ESC] in sequence to enter the user program.
2. Press [ ] until PROG appears and press [ENTER] .
3. Press [ ] until the desired channel appears. Press [ENTER] at CH1
or CH2 .
4. Press [ ] until I/O appears and press [ENTER] .
5. Enter a value from 0 to 1 ft/sec (0 to 0.30 m/sec) for the zero
cutoff by using the arrow keys. The recommended setting is 0.1
ft/sec (0.03 m/sec). Press [
desired location and press
the number. Then press [ENTER] .
Use this option to calculate mass flow from a static fluid density.
Complete the following steps (see Figure A-3 on page A-3) to enter
the static density of the fluid:
1. Press [ESC] , [ENTER] , [ESC] in sequence to enter the user program.
2. Press [ ] until PROG appears and press [ENTER] .
3. Press [ ] until the desired channel appears. Press [ENTER] at CH1
or CH2 .
4. Press [ ] until SETUP appears and press [ENTER] .
5. Press [ ] until ADVAN appears and press [ENTER] .
6. Press [ ] until MASS appears and press [ENTER] .
7. Press [ ] to activate or deactivate mass flow (mass flow is
calculated from a static density) and press [ENTER] .
8. If you have activated mass flow, enter the fluid density by using
the arrow keys. Press [
desired location and press
the number. Then press [ENTER] .
]
and [ ] to move the cursor to the
[ ] and [ ]
to increase or decrease
]
and [ ] to move the cursor to the
[ ] and [ ]
to increase or decrease
September 2004
2-11
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