YOKOGAWA TB750G, Quick Start Manual, Page: 21 / 37

<3. OPERATION>
3-8
IM 12E01A06-02E
3.2 Normal Operation
The TB750G turbidimeter does not normally require any manual operations except when periodic
cleaning/calibration is performed or when a failure occurs.
3.2.1 When Sample Water Supply is Cut Off
The turbidity measurement is not affected by temporary suspension of sample water supply, but long-
term suspension may interfere with the accuracy of the instrument. Since the TB750G cannot detect
whether the sample water supply is stopped or not, periodical check of the sample line is needed.
3.2.2 Shutdown
The parameter settings and other information set in the turbidimeter are retained even if power is
turned off. If the instrument will be out of operation for a long period, power should be removed.
Dirt and/or stains on the instrument should be washed off thoroughly when the turbidimeter is to be
removed from the site. Rinse the inside of the measurement cell, and then empty the cell or keep zero
water running through the cell.
3.2.3 Restart
When power is returned, the turbidimeter is put into the measurement state. It requires at least one
hour for warm-up. Check that the reading stabilizes well, before performing calibration.