HORIBA HE-300C Field-installation type electrical conductivity meter (conductivity meter)

Model

HE-300C

Sensors in combination

2-electrode method conductivity sensor
ESH and FS Series sensor of cell constant 0.01/cm, 0.1/cm, or 1.0/cm

Measurable
range
(*Note 1)

Cell constant (/cm)

0.01
(ESH-001)

0.1
(ESH/FS-01)

1.0
(ESH-1)

Unit

Conductivity

μS/cm

0.000 to 2.000
0.00 to 10.00

0.000 to 2.000
0.00 to 20.00
0.0 to 100.0

0.0 to 200.0
0 to 1000

mS/m

0.0000 to 0.2000
0.000 to 1.000

0.0000 to 0.2000
0.000 to 2.000
0.00 to 10.00

0.00 to 20.00
0.0 to 100.0

TDS
conversion

mg/L

0.00 to 2.00
0.0 to 10.0

0.00 to 2.00
0.0 to 20.0
0 to 100

0 to 200
0 to 1000

Temperature

℃

0 to 100 (display range: −10℃ to 160℃)

Display
resolution

Conductivity
/ TDS conversion

As shown in the measuring table.

Temperature

0.01℃

Performance

Conductivity

Repeatability

Within ±0.5% of the full scale (response for equivalent input)
Within ±5% of the full scale in the range of 2000 μS/cm or 200 mS/m for FS-01 sensor

Linearity

Within ±0.5% of the full scale (response for equivalent input)
Within ±5% of the full scale in the range of 2000 μS/cm or 200 mS/m for FS-01 sensor

TDS conversion

Repeatability

Within ±1.5% of full-scale value (response for equivalent input)

Linearity

Within ±1.5% of full-scale value (response for equivalent input)

Temperature

Repeatability

±0.1℃(response for equivalent input)

Linearity

±0.5℃(response for equivalent input)

Transmission
output

Output type

4 mA to 20 mA DC input/output insulation type (two-wire transmission type)

Load resistance

Maximum: 600 Ω. Case of 24 V DC power supply (*Note 3)

Linearity

Within ±0.08 mA (output only)

Repeatability

Within ±0.02 mA (output only)

Output range

Conductivity: Free setting within a measuring range.

Occasional out for error

Hold or burnout to either 3.8 mA or 21 mA

Transmission hold

In the maintenance mode, transmission signal is held at the latest value or preset value.
In the calibration mode, transmission signal can be alive or held.

Contact
input

Number of input points

1

Contact type

No-voltage a-contact

Conditions

ON resistance: 40 Ω max.
Open voltage: 1.2 VDC
Short-circuit current: 21 mA DC max.

Contact function

External input for transmission holding.

Temperature
compensation

Temperature element

Platinum resistor: 1 kΩ (0℃)

Temperature compensation

• Temperature characteristic of NaCl (reference temperature: 5℃ to 95℃)

• Arbitrary temperature coefficient input (reference temperature: 5℃ to 95℃; temperature coefficient: ±3%/℃)

• No temperature compensation
  One of the three ways of compensation is selectable.
  (In the de-ionized water area, the temperature compensation for pure water is automatically performed in both NaCl and arbitrary temperature coefficient compensation settings.)

Temperature compensation
range

0℃ to 100℃ (However, the compensation calculation is extended lower than 0℃ or higher than 100℃.)

Temperature calibration

1 point calibration comparing to reference thermometer

Calibration

Conductivity

Based on parameter input of coefficient for the sensor cell constant.

TDS conversion

Conversion by user-defined coefficient value
(TDS calculation is 0.30 to 1.00 times of sample conductivity by μS/cm.)

Self-check

Sensor diagnosis error

Temperature sensor short-circuit, temperature sensor disconnection,
and out of the temperature measurement range

Meter error

CPU error, ADC error, and memory error

Operating temperature range

−20℃ to 60℃ (without freeze)

Operating humidity range

Relative humidity: 5% to 90% (without condensation)

Storage temperature

−25℃ to 65℃