
Chapter 1. Programming Site Data
1-21
DigitalFlow™ GC868 Programming Manual (2-Channel)
1.6.5.4.7 Setting Skan
Parameters
In the
SKAN
option, you can activate and set parameters for a negative peak
percent for both the Skan measurement technique (in the
ACTIV
submenu) and the
Skan portion of the Skan/Measure technique. When negative peak percent is active,
the GC868 searches for the maximum negative peak before the positive peak, and
then calculates the T at both negative peak percents entered; these times are
averaged for the T measurement.
IMPORTANT:
The
SKAN
default settings are suitable for most applications. Before
changing any of these parameters, consult the factory.
1.
Press
[
→
]
and
[F3]
to enter the
SKAN
option.
2.
Press
[F1]
if you do not want to
Use Negative Peak,
or
[F2]
to activate negative
peak. (If you press
[F1]
, the GC868 returns to the
ADVAN
window.)
3.
Enter the
Minimum Negative Peak %
from -100 to -10%, and press
[ENT]
.
4.
Enter the
Maximum Negative Peak %
from -100 to -10%, and press
[ENT]
.
The GC868 returns to the
ADVAN
window.
1.6.5.4.8 Synchronizing
Meter
Transmissions
The
TRANS
(Transmit) option appears only if an alarm card has been installed in the
GC868. It allows the GC868 and its transducers to operate synchronously with
another meter on the same flowcell. When triggered, the alarm card can close a
relay when the other meter is transmitting, to prevent conflicting signals.
1.
Press
[
→
]
and
[F4]
to enter the
TRANS
option.
2.
Press
[F1]
if you do not want to activate the
Gate Alarm,
or
[F2]
to activate the
alarm.
1.6.5.5
Procedure Options
After completing the above steps, the meter returns to the
SETUP
prompt. Continue
as follows:
• To continue programming the meter, refer to the menu maps in Appendix A
and navigate to the desired menu. Then, proceed to the appropriate section of
this manual for instructions.
• To leave the
User Program
and retain the previous settings, press
[EXIT]
twice
and then press
[F1] = NO
at the
SAVE
prompt. Any programming changes will
be discarded and you will be returned to the data display.
• To leave the
User Program
and return to measurement mode, press
[EXIT]
twice and then press
[F2] = YES
at the
SAVE
prompt. Your programming
changes will be entered into the meter’s memory, and you will be returned to
the data display.
1.7
Entering Global
Data
The
GLOBL
menu is used to enter information that is not specific to one of the
individual channels. Information programmed via this menu is used to compute
parameters such as the sum, difference or average of the channel 1 and channel 2
signals. In addition, several general system parameters may be entered in the
GLOBL
menu.
IMPORTANT:
When calculating the
SUM
,
DIF
or
AVE
readouts, data from the
GLOBL-SYSTM
submenu is used. Any conflicting data entered in the
CH1-SYSTM
or
CH2-SYSTM
submenus is overridden.
The following submenus are included in the
GLOBL
menu:
•
CLOCK
- used to enter the current date and time
•
SYSTM
- used to specify the units of measure used in calculations
•
I/O
- used to set up error handling and to configure analog inputs and outputs
•
COMM
- used to set up the serial communications port
•
SECUR
- used to specify a programming access password.
After selecting
[F3]=GLOBL
at the initial programming screen, the following screen
appears:
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