YOKOGAWA TB830D, User Manual, Page: 31 / 85

<3. PREPARATION for OPERATION>
3-2
IM 12E04B40-02EN 1st Edition : Mar. 08, 2023-00
3.3 Supplying Power and switching operation
modes
Supply power when the pipes and wires are in normal condition. The detector is activated in a
measuring mode.
Set the maintenance mode to On until the operation preparation is completed. Press x on the
main screen of the converter to enter maintenance mode.
3.4 Valve operation
With the maintenance mode on, open and close the solenoid valve (SV1 to SV4) from the
maintenance menu (solenoid valve/wiper operation) on the converter. Or with the cleaning box
enabled, you can operate with the manual switch icon ( ) at the bottom of the main screen.
When automatic cleaning or automatic zero calibration is specified, the solenoid valve is opened
and closed by automatic control.
Table 3.2 shows the open/close status of the valves at measuring, draining, and zero calibration
for the respective sampling specifications.
Refer to “4.5 Automatic cleaning/Automatic zero calibration setting” for the operation when
automatic cleaning and automatic zero calibration are selected.
Table 3.2 Status of valves in each action in the table
Sampling
system Code
Operating status
Manual valve Solenoid valve
V1 V2 V3 V4 V5 SV1 SV2 SV3 SV4
-A1 Measuring ○ ○ × × × –
Drain × × ×
○
Zero calibration (zero water) × ○ × ×
Manual cleaning (Sample) ○ × ○ ×
Manual cleaning (zero water) × ○ ○ ×
-A2 Measuring ○ ○ × ○ – – × – ×
Drain × × ×
○
Zero calibration (zero water) × ○ × ×
Manual cleaning (Sample) ○ × ○ ×
Manual cleaning (zero water) × ○ ○ ×
-A3 Measuring ○ ○ ○ ○ ○ × × ×
Drain × × × × ○
Zero calibration (zero water)
○
× ×
○
×
Manual cleaning (Sample) ○ ○ ○ × ×
Manual cleaning (zero water) ○ × ○ ○ ×
○
: Open, ×: Closed, -: No specification
V6 and V7 are manual valves for supplying sample with /PH□2, /PH□7 and /FC. Operate
referring to the piping diagram.
CAUTION
The pinch valve (SV4) is hot when energized, so it is setup to turn Off automatically after 10
minutes or more.