HORIBA HE-480H Panel-mount type conductivity meter (conductivity meter)

Model

HE-480H

Measurement
method

Electrode type (4-electrode method)

Cell constant

1.0/cm

Measuring range*

Measurement range
(S/m)

0.000 to 2.000

0.00 to 20.00

0.00 to 50.00

Measurement range
(mS/cm)

0.00 to 20.00

0.0 to 200.0

0.0 to 500.0

Seawater salinity
conversion value (%)

0.00 to 4.00

NaCl salinity
conversion value (%)

0.0 to 20.0

Temperature

0℃ to 100℃
(The displayed decimal place is selectable among 0, 1, and 2.)

Repeatability

Conductivity display

Within ±0.5% of the full scale

(in equivalent input)

Salinity conversion display

Within ±1% of the full scale

Linearity

Conductivity display

Within ±0.5% of the full scale

(in equivalent input)

Salinity conversion display

Within ±1% of the full scale

Transmission
output

4 mA to 20 mA DC: input/output isolated type
Maximum load resistance: 900Ω
Transmission output range: Freely selectable within the measurement range

Contact output

Outputs: 2 points
Alarm contact output (R1 and R2)
　Contact type: relay contact, SPDT (1c)
　Contact rating: 240 V AC, 3 A and 30 V DC, 3 A (resistance load)
　Contact function: selectable from upper/lower limit operation (ON/OFF control), alarm, and maintenance.

Calibration function

Conductivity: Based on the specified compensation coefficient for the cell constant
(parameter input)
Temperature: Calibrated by comparing with the reference thermometer

Transmission
output hold feature

• Previous value hold

• Optional value hold

• Continuous
  Selectable from the above (However, only the previous value hold is available in the maintenance mode.)

Self-diagnosis
function

• Sensor diagnosis
  Short-circuit and disconnection of the temperature sensor

• Out of the measurement range

• A/D converter scale over

• Converter error