YOKOGAWA TB750G, Quick Start Manual, Page: 17 / 37

<3. OPERATION>
3-4
IM 12E01A06-02E
Span calibration using check block
Note: For span calibration using standard solution, refer to next page.
F3-5E.ai
[NO]
[YES]
[YES]
[ENT]
[YES]
[NO]
Check block
END
HOLD
X.XXX
STD.CAL
X.XXX
ZERO
X.XXX
SPAN
XX.XX
SPAN
XX.XX
CAL.END
• Stop supplying zero water
• Drain zero water
• Install check block *
• Supply zero water
• Confirm reading has stabilized (3-5 min)
A
• Check that display reads the value of check block
Span calibration is complete
Auto-adjustment
XX.XX
VALUE
{XX.XX} None configurable
Release HOLD **
From zero calibration
* How to install check block
1. Remove the rubber cover from the top of the detector.
2. Remove the retaining plate on the window of the top cover
by loosening the 2 setscrews.
3. Detach the observation window and replace it with the
check block. Fix it with the 2 setscrews securely.
** Be sure to release HOLD