HORIBA HD-200FL Field-installation type optical dissolved oxygen meter (DO meter)

Measuring method

Optical (fluorescent)

Measuring range

DO: 0 to 20 mg/L      Resolution: 0.01 mg/L
Saturation: 0 to 200%    Resolution: 0.1%
Temperature: 0 to 50°C  Resolution: 0.1°C

Repeatability

Within ± 1% of full scale

Linearity

Within ±2% of full scale

Transmission
output

2 points 4 mA to 20 mA DC output isolated type Maximum load resistance 900 Ω
　Range 1: DO concentration: Freely selectable within the measurement range
　Range 2: Temperature: Freely selectable within the range from -10.0 to 110.0°C
　Alarm: Burnout function (3.8 mA or 21 mA)
　Hold: Selectable from previous value hold, optional value hold

Contact
output

3 points Dry contact output Relay contact, SPDT (1c)
　Signal R1, R2: upper limit alarm, lower limit alarm,
        hold, Cleaning (selectable)
      FAIL : Alarm
　Control operation Control width: 0.02 to 4.00 mg/L (±0.01 to ±2.00 mg/L)

On cleaning
output

1 point Wet contact output (connecting power supply voltage output) Relay contact, SPST (1a)
　Contact function: Solenoid Valve Control

External input

1 point Contact shape: Open connector dry ‘a’ contact
　Contact function: Cleaning Unit Control

Communication function

RS-485 2-line, insulated input/output (transmission output is not insulated)

Temperature
compensation range

0 to 50°C