Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 - Manual (Page 158)

<13. COMMISSIONING OF DO (Dissolved Oxygen)>
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IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
Damping time
This is the time taken for a response to a step input change to reach 90% of the final value
(attenuation time). Set this time in sec.
l Simulate
When this function is selected, an output of the instrument will be a fixed current value set in % of
the output span. The output span range is -2.5% to 112.5% (3.6 mA to 22.0 mA).
When “Simulate” is selected, regardless of hold setting, the output is always simulated value.
n Configure Hold
On the Configure Hold, settings are performed to hold of the mA output at a preset value. (Refer
to the section 14.5.) This is enabled only if “mA” is “Output.”
During the Commissioning or the Quick Setup, the mA output is automatically held. The preset
value depends on a setting on the “Last or fixed”.
“Last”: The preset value is a value measured just before hold condition.
“Fixed”: The preset value is a value set in the “Fixed value mA”.
When the “Fixed” is selected, set a mA value in the “Fixed value mA”.
Selection on the “Hold during Calibration/Wash” decides to activate or deactivate the hold
function automatically during calibration or wash.
“Enabled”: Activation of the automatic hold function
“Disabled”: No automatic hold function
Only when the “PH201G” is selected on the Communication, the message of “Hold during
Calibration/Wash” is displayed. On other selections, the message of “Hold during Calibration” is
displayed.
13.4 Error configuration
In Error configuration, configure the statuses of various error causes.
This allows the system to notify the user of the occurrence of an error according to the status
categories in the Error configuration.
Select a status category from among Off, Warn. (Warning), and Fault.
“Fault” automatically performs burn-out. When Burn has been set to Off (13.3 Output setup), only
the error message is displayed.
“Warn.” displays an error message.
When selecting PH201G in the communication setting, make sure that the “Fail contact” setting
is appropriate.
The settable causes of errors are determined based on the settings of the Sensor setup and
Measurement setup, and a status category is set to the causes displayed in the Errors 1/2 and
2/2 screens.
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