Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Manual de usuario Pagina 162

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<13. COMMISSIONING OF DO (Dissolved Oxygen)>
13-11
IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
If blank is selected for a parameter, items below that parameter must all be set to blank. If an item
is blank, those below it cannot be set to a status other than blank.
For more information on HART communication, see the Technical Information (TI 12A01A02-
60E)intheattachedCD-ROM.
n PH201G
Select this menu if the PH201G distributor is connected to the instrument.
In the PH201G setup screen, make settings for “Hold contact,” “Fail contact,” and “Wash
contact.”
l Hold contact
SelectDisabledorEnabled.
When this item is enabled, the output will be held according to the setting of “Hold type” on the
Hold setup screen.
l Fail contact
Selectastatusfromamong“Fail+Warn,”“Failonly,”and“Disabled.”
Thissettingdependsontheerrorconguration.See“13.4Errorconguration.”
“Fail” corresponds to “Fault.”
l Wash contact
SelectDisabledorEnabled.
When this item is enabled, items for a wash can be set on the Wash settings screen.
In the Wash settings screen, set the interval time, wash time, and recovery time and setup of
various washes.
Interval time: Set the wash interval in hours.
Wash time/measure time: Set the wash time in minutes. In a continuous wash, wash time is
replaced by measure time.
Recovery time: Set the recovery time in minutes.
Manualwash: Select“Disabled”or“Enabled.”
When this item is enabled, a wash cycle can be activated manually. On the
Calibration/Wash screen, press the “Start manual wash cycle” to perform a
manual wash.
Imp2wash: Select“Disabled”or“Enabled.”
When this item is enabled, a wash cycle can be started if the “Impedance 2
too high” error occurs with respect to the reference electrode.
Continuouswash:Select“Disabled”or“Enabled.”
A continuous wash cycle is started at the instant when this item is enabled.
In a continuous wash, the “Measure time” and “Interval time” are reversed
(see Figure 13.3).
DO
13
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