HD-480 ???????(4-Wire Transmission), ???? ?)

Exchanging the sensor is a one-touch operation
The sensor is disposable, and can be exchanged with the touch of a key.
There is no need for work requiring long experience or expertise, such as exchanging the membrane or refilling the internal fluid, as generally required by other sensors until now.
Two types of span correction
You can choose from two types of span correction: the commonly used saturated fluid correction, and the plain and simple atmospheric correction.
Salt adjustment function
A function which automatically corrects the data based on the salt concentration of the measurement sample has been included.
This means it can make precise measurements in both freshwater and seawater.
Uses lead-free solder
To reduce the burden on the environment, lead-free solder has been used to mount the components on the printed circuit board.

Product name	Dissolved oxygen meter
Model	HD-480
Measurement method	Galvanic cell method
Measuring range	Dissolved oxygen 0 mg/L to 20 mg/L, 0.01 mg/L resolution Saturation 0% to 200%, 1% resolution Temperature 0℃ to 40℃, 0.1℃ resolution
Repeatability	Within ±0.5% of the full scale (by equivalent input)
Linearity	Within ±0.5% of the full scale (by equivalent input)
Transmission output	4 mA to 20 mA DC, input/output isolated type Max. load resistance: 900 Ω Transmission output range: Freely settable within the measuring 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 limit operation”, “lower limit operation” ???(ON/OFF control), “anomaly alarm”, “during maintenance”, and “temperature”
Calibration function	Air calibration and solution calibration Salinity compensation (0.0% to 5.0%) Temperature calibration (two points)
Transmission output hold feature	Selectable from previous value hold, optional value hold or continuous (however,only the previous value hold is available in the maintenance mode)
Self-diagnosis function	Calibration failure: Zero error and sensitivity error Sensor diagnosis: Short-circuit or disconnection of temperature sensor Measuring range error Product error
Temperature-compensated range	0℃ to 40℃
Ambient temperature	?5℃ to 45℃
Relative humidity	20% to 85% (without dew condensation)
Storage temperature	?25℃ to 65℃
Power supply	Rated voltage 100 V to 240 V AC, 50/60 Hz, 10 VA (max.)
Structure	Indoor-use panel installation type ??Panel case: ABS, Terminal: PBT Panel: IP65 dust and water proof structure
Protective structure	Panel: IP65 (IEC60529, JIS C0920) Rear case: IP20, Terminal:IP00 Class II device (IEC61010-1) Pollution level 2 (IEC61010-1)
Compatible standards	CE marking		EMC?:EN61326-1 ? ??Class A, Industrial electromagnetic environment Safety :EN61010-1 RoHS ?:EN50581 ??? 9. Industrial monitoring and control instruments
Compatible standards	FCC rules		Part15 Class A
External dimensions	48 (W) mm × 96 (H) mm × 115 (D) mm Case depth: approx. 105 mm
Mass	Approx. 400 g
Compatible sensors	Probe	DP-100	Operating temperature: 0℃ to 45℃
Compatible sensors	Sensor	5400, 5405	Operating temperature: 0℃ to 45℃

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HD-480

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