Emerson Process Management 3420 Carbon Monoxide Alarm User Manual


 
224 Analog (Current) output
Section 6: Meter operation Reference, Installation, and Operations Manual
June 2013 3-9000-743 Rev S
be set from 0 to 150%. The 100% Scaling indicates the full scale value for the frequency outputs
and can be changed from the
Field Setup Wizard.
Click the
Start button to enter Test mode. Each output has its own start button so each available
output can be tested one at a time. The frequency and current outputs will not be updated until
the end of the next batch cycle. Once the Test mode LED turns green, the values displayed for
the outputs will represent the values the outputs are driving under test.
For the frequency outputs, the frequency for both the A and B channels are displayed. If
Channel B zero on error is selected in the Field Setup Wizard the Channel B phase will show zero
because the frequency output is considered invalid during test mode.
The K-Factor and Inverse K-Factor will be displayed for the frequency outputs configured for
Volumetric flow rate. The values will be displayed next to the label for the associated frequency
output.
To set the digital outputs to a known state, select the Test High or Test Low for the appropriate
digital output and click the
Start button for the digital output. Once the Test mode LED turns
green, the value displayed for the outputs will represent the values the outputs are driving
under test.
For Daniel Gas Ultrasonic meters, the timeout for each output in test mode is reset by Daniel
MeterLink each time the values are updated. As long as this dialog is open with an output in test
mode, the output will remain in test mode or until the
Stop button is clicked to end the test.
In the event communications are lost between Daniel MeterLink and the meter (before a test
mode is stopped), the meter will automatically end the test mode after the
NonNormalMode-
Timeout
has expired. This can be from 1 to 30 minutes depending on its settings. By default, the
timeout is set to two minutes.
The Output setting can only be changed while out of Test mode. To end the Test mode, click
Stop and wait for the end of the batch and the Test mode LED to turn gray to indicate the
Outputs are driving live values.
Click
Cancel to close the dialog box. If the meter is currently in Test mode when Cancel is clicked,
Daniel MeterLink will first end the test mode before returning to the Main Screen.
Entering, configuring, and exiting this mode is accomplished by setting data points using the
Daniel MeterLink
Tools - Outputs Test screen as described in Tab l e 6- 1 4.
Table 6-14 Data points for output test mode
Daniel MeterLink
Display Name
Data Points, Options and Guidelines
Current output
Output setting
(Option Board)
Data points affected:
AO1TestModeOutputPercent
Options:
Enter the integer percentage of full scale for the analog output within the range [0, 100 %]
where 0% corresponds to the minimum output (4 mA) and 100% corresponds to the
maximum output (20 mA).
Guidelines:
The specified test value takes effect within one batch period of clicking the Start button
(see below).