Calibrating Ph; Individual Zero Calibration And Span Calibration <Ph - horiba TW-150 Instruction Manual

4 CALIBRATION
4.4

Calibrating pH

pH is optional.
There are two calibration patterns for pH. See "4.1 Calibration Patterns and Cycles" (page 17)
and select one of the patterns.
Every month calibration using sample water is recommended to measure accurate pH value.
4.4.1 Individual zero calibration and span calibration <pH>
MEASUREMENT screen
See "4.3 Displaying the Calibration Screen" (page 23).
Preparation

Calibration tank...2

Zero calibration solution...1 L (Pour the solution into one of the calibration tanks)

Span calibration solution...1 L (Pour the solution into the other calibration tank)

Used fluid tank (Install it so that used fluid flows into the tank)

Calibration procedure

Calibrate in the order of Individual zero calibration → span calibration.
Individual zero calibration

1. Place the calibration tank with zero calibration solution beside the device.
2. Connect the tank to the calibration inlet of the device.
Calibration
solution tank
24
[CAL.]
CALIBRATION screen
Connection
[pH]
pHCAL. screen
Stop valve
must be closed.