YOKOGAWA TB400G-A1 Series, User Manual, Page: 77 / 140

<6. PROCEDURES FOR CONVERTER OPERATION>
6-8
IM 12E04A02-02E
(c) [v] Key (Numeral-down key):
Every time this key is pressed, the numeric value in the selected digit decreases in turn; when
it reaches 0, it returns to 9. In the most signi fi cant digit, a "-" (minus sign) is inserted next to 0.
However, if the displayed data do not include negative values, the negative sign is not inserted.
(d) [ENT] Key (Entry key):
This key is used to enter displayed data. When data are entered, the entire displayed data fl ash
only once.
6.3.4 Opening/Closing Valves
The opening or closing of a solenoid valve is performed with the valve operation key in the
maintenance mode. When a solenoid valve operates, the relevant lamp is lit.
Regardless of a solenoid valve's open/close status in the maintenance mode, if the mode is
changed to the <MEAS.> mode, e.g., for the speci fi cation "with automatic cleaning and automatic
calibration", the predetermined sequential operation is performed and the solenoid valves
automatically open or close.
Table 6.7 shows the use of solenoid valves based on the sampling speci
fi cations (Suf fi x code).
Table 6.7 Sampling Speci fi cations (Suf fi x Code) and Use of Solenoid Valves
Suf fi x code SV1 SV2 SV3 SV4
-NN × × × ×
-A1 × × × ×
-A2
○ ○
× ×
-A3
○ ○ ○ ○
×: Used
○
: Not used
Note: SV1 is a pinch valve, SV3 is a motor-operated valves and SV2 and SV4 are solenoid valves.
6.4 Operation in <Meas.> Mode
Each data item in Table 6.3 is displayed by [FUNC] key operation. In this section, the functions
are described in the following order.
(1) Turbidity
(2) Lamp
voltage
(3) Turbidity element detection current
(4) Reference
element
(5) Analog output in %
(6) Analog output in mA
(7) Zero-point
error
(8) Slope
(1) Turbidity (FUNCTION "1")
Turbidity is displayed in the range of -10.00 to 2200 mg/l.
The unit that is displayed can be selected from "mg/l", "degree", or "FTU" in the <PROGRAM1>
mode and with FUNCTION "C.".
3rd Edition : May. 31, 2010-00