GE AquaTrans AT868, Abridged Manual

Page: 37 / 67

Programming Site Data 2-11
September 2004
Entering the Zero Cutoff
Value [CHx-I/O Menu]
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 [
X
] until
PROG
appears and press
[ENTER]
.
3. Press [
X
] until the desired channel appears. Press
[ENTER]
at
CH1
or
CH2
.
4. Press [
X
] 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 [
W
]
and [
X
] to move the cursor to the
desired location and press
[
S
]
and
[
T
]
to increase or decrease
the number. Then press
[ENTER]
.
Activating Mass Flow
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 [
X
] until
PROG
appears and press
[ENTER]
.
3.
Press [
X
] until the desired channel appears. Press
[ENTER]
at
CH1
or CH2 .
4.
Press [
X
] until
SETUP
appears and press
[ENTER]
.
5. Press [
X
] until ADVAN appears and press [ENTER] .
6.
Press [
X
] until
MASS
appears and press
[ENTER]
.
7.
Press [
X
] 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 [
W
]
and [
X
] to move the cursor to the
desired location and press
[
S
]
and
[
T
]
to increase or decrease
the number. Then press
[ENTER]
.