Emerson Process Management 3410 Manual Do Utilizador

3-9000-743 Rev S

June 2013

4.1.6

Optional Aga10 key (sound velocity calculation)

The optional AGA10 sound velocity calculation feature allows the meter to calculate the 
predicted sound velocity based upon the gas composition and compare this value to the 
measured average sound velocity. The gas composition can be either specified via data points or 
optionally read live from a GC (see above). This feature is enabled/disabled via the 

AGA10Key 

data point.

4.1.7

Key status

The Status column will indicate if the key entered is a Valid key or if the key is disabled.

Leaving the Key field empty or entering 0000-0000-0000-0000 will disable the feature once 

 is clicked.

Daniel MeterLink (firmware version 1.6X and below) provides two key-expiration-related 
warnings: one when any optional feature key is within 30 days of expiring (via the 

AboutToExpire data point) and another when any optional feature key has expired (via the 

IsAnyKeyExpired data point).

Each warning data point is individually acknowledgeable from within the Daniel MeterLink 

 page via the ‘

’ button. Once a warning is acknowledged, it will not 

become active again until a different key is within 30 days of expiring or has expired.

The 

IsAnyKeyAboutToExpire and IsAnyKeyExpired data points are both audit-logged and 

alarm-logged.

Prior to firmware version 1.30, the Ethernet access and data log access features were included at 
no extra charge. For customers with firmware v1.30 and below wishing to upgrade to newer 
(1.30 or later) firmware, the newer firmware automatically “grandfathers” these optional 
features by assigning non-expiring key values to the 

Eth1Key and LogAccessKey data points 

based upon the CPU Board serial number. GC interface and AGA10 sound velocity calculation 
features are not “grandfathered.”

All optional features with disabled keys are automatically enabled via expiring keys for a trial 
period that ends 90 days after continuous flow is established (firmware v1.6X and below). 
Continuous flow is established when the meter average flow velocity is continuously above the 
low-flow limit for eight hours.