43
Figure 29: “User-Defi ned Mixture” Menu Selection with new MyMix1 Mixture
Any saved mixture can be edited by the user. In order to edit a saved mixture, highlight it
using Up or Down and then pressing Left. The confi rmation message shown in Figure 30
will appear. Select “YES” then press the joystick equivalent of Enter.
Figure 30: "Edit Mixture" Menu Selection
In the edit mixture mode, the user can change the mixture name, any gas component gas
name, and any ratio value.
MyMix1
Add Mixture: 19 Free
Edit MyMix1 Mixture?
NO
YES
6.4.10 Submenu “Gas Flow Alarm”
The DPC provides the user with a fl exible Alarm warning system that monitors the Fluid Flow
for all conditions that fall outside confi gurable limits, as well as visual feedback for the user
via the OLED, status LED or an SSR output. The Flow Alarm has several attributes which may
be confi gured by the user via OLED/joystick interface or digital communication interface.
These attributes control the conditions that cause the Alarm to occur and specify actions to
be taken when the fl ow rate is outside the specifi ed conditions.
Flow Alarm conditions become true when the absolute value of the difference between cur-
rent fl ow reading and set point value is equal or higher than corresponding value of High or
Low Flow Alarm levels. Alarm action can be assigned with a preset Delay interval of 0 to 3600
seconds before activating the SSR output. In most applications, the user will want to have a
brief delay (2-10 seconds) to qualify that the fl ow rate is really settled at a chosen level and
has not spiked because of some interference. The Latch Mode control feature allows SSR
output to be latched on or to follow the corresponding Alarm status.
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