horiba TW-150 Instruction Manual page 190

9 REFERENCE
Installation
environment
This standard is defined in Japanese drinking water test method as of 2017.
No. Measurement item
1 Turbidity
2 Color
Free residual
3
chlorine (FRC)
4 Water pressure
5 pH
Conductivity
6
(optional)
Water temperature
7
(optional)
*1,*2: Refer to page 162 for correct measurement.
164
Flat and stable location with minimum vibrations or shocks

No dust, mist or corrosive gas in the air

Under atmospheric pressure

No direct sunlight

Good ventilation

Altitude 2000 m or lower

Table 1 Water quality standard
No. Measurement item
1 Turbidity
2 Color
3 pH
Table 2 Measurement item specifications
Measurement
Measurement range
system
90 degree light 0 to 2 NTU
scattering 0 to 5 NTU
method 0 to 10 NTU
Transmitted
light 0 to 10 TCU
absorbance 0 to 20 TCU
method
Polarographic
0 to 5 mg/L
method
Semiconductor
0 to 1 MPa
detection
0 to 10 Bar
method
Glass electrode
pH 2 to pH 12
method
0 to 500 µS/cm
AC 2-Electrode
0 to 1000 µS/cm
Thermistor
0 to 50C
method
Acceptable range
2 degree or less
5 degree or less
pH 5.8 to pH 8.6
Repeatability
±2.5% of full scale
±5.0% of full scale
±2.5% of full scale
±1.0% of full scale
±0.1 pH
±2.0% of full scale
±0.5C
Calibration method
Formazine standard
1
solution*
2
Standard color solution*
DPD colorimetric method
Standard pressure gauge
pH standard solution
KCl standard solution
Standard thermometer