YOKOGAWA Vigilant Plant EXA TB Series, Руководство пользователя

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<4. OPERATION>
4-6
IM 12E04A02-02E
Table 4.2 Cleaning Operation Setpoints
Item
Setting
range
Factory
setting
Unit
Setting mode
Mode FUNCTION
Cleaning period 0.1 to 24.0 2.0 Hours PROGRAM 2 1
Cleaning time 1 10 to 120 30 Sec PROGRAM 2 4
Draining time 1 1 to 20 10 Sec PROGRAM 2 6
Water fi lling time 1 10 to 120 100 Sec PROGRAM 2 8
Relaxation time 10 to 120 150 Sec PROGRAM 2 A
Number of cleaning repetitions 30 to 600 5 times PROGRAM 2 3
See Section 6.7 for the setting procedures for each setpoint.
b. With Automatic Zero Calibration (Suf fi x code: -A3)
Automatic cleaning can be start in the following two ways.
• Startup with the internal timer.
• Startup with FUNCTION “6” in the <MAINT.> mode (see Section 6.5).
Note: Startup with the internal timer can be selected for execution (on)/stop (off) using
FUNCTION “A” in the <PROGRAM1> mode. It has been to execution (on) when
shipped from the factory.
The internal timer operation is shown in Figure 4.7.
As shown in the
fi gure, the automatic cleaning operation is repeated at every set time of the
cleaning period (A) and automatic zero calibration is implemented once in every 3 repetitions (for
cleaning calibration ratio B = 3).
A A A A A
A
Measurement start *1
F0407.ai
B=1 2 3 1 2 3
Cleaning Cleaning Calibrattion Cleaning Cleaning Calibrattion
*1: Measurement start is defined to be the point specified in the following:
Other mode <MEAS.> mode
Power off Power on (<MEAS.> mode)
Figure 4.7 Cleaning (calibration) period (Example: for cleaning calibration ratio = 3)
However, if startup of the automatic zero calibration with the internal timer is stopped, the
cleaning operation becomes the same as in Figure 4.5 because the automatic zerocalibration
operation is eliminated.
Figure 4.8 shows the automatic-cleaning operation time chart and Table 4.3 the settings.
<Valve used>
SV1: Drain valve
SV2: Cleaning-water valve
SV3: Measuring-water valve
SV4: “Zero-water” valve
3rd Edition : May. 31, 2010-00