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〈Catalog〉Industrial Water Quality Measuring Instruments
| Product name | ORP meter | |||
|---|---|---|---|---|
| Model | HO-300 | |||
| Combined sensor | ORP electrode | |||
| Measurable range | ORP | −2000 mV to 2000 mV (display range: −2200 mV to 2200 mV) | ||
| Temperature | 0℃ to 100℃
| |||
| Display resolution | ORP | 1 mV | ||
| Temperature | 0.1℃ | |||
| Performance | ORP | Repeatability | Within ±5mV (response for equivalent input) | |
| Linearity | Within ±5mV (response for equivalent input) | |||
| Temperature | Repeatability | ±0.3℃ (response for equivalent input) | ||
| Linearity | ±0.3℃ (response for equivalent input) | |||
| Transmission output | Output type | 4 mA to 20 mA DC: input/output insulation type | ||
| Load resistance | Max.: 600Ω (case of 24 V DC power supply)*1 | |||
| Linearity | Within ±0.08 mA (output only) | |||
| Repeatability | Within ±0.02 mA (output only) | |||
| Output range | ORP: Selection from preset ranges or free range input within 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 Open voltage: 1.2 V Short-circuit current: 21 mA DC max. | |||
| Contact function | External input for transmission holding. | |||
| Temperature measurement | Applicable temperature element | Platinum resistor: 1 kΩ (0℃) | ||
| Positive relation resistor with temperature: 500 Ω (25℃), 6.8 kΩ (25℃), 10 kΩ (25℃) | ||||
| Element selection method | Automatic temperature sensor type detection or manual selection (no temperature element is selectable) | |||
| Calibration | ORP adjust function | Adjust (offset adjustment): −200 mV to 200 mV Span sensitivity correction: 0.500 to 1.500 | ||
| Temperature calibration | 1 point calibration comparing reference thermometer | |||
| Self-check | Calibration error | Temperature calibration error Out of temperature calibration range (for ORP sensor with RTD). | ||
| Electrode diagnostic error | Reference electrode impedance error (only applicable for differential circuit mode with a liquid contact electrode) Temperature sensor short-circuit, temperature sensor disconnection, and out of the temperature measurement range | |||
| Converter error | CPU, ADC, and memory errors | |||
| Operating temperature range | −20℃ to 60℃ (without freeze) | |||
| Operating humidity range | Relative humidity: 5% to 90% (without condensation) | |||
| Storage temperature | −25℃ to 65℃ | |||
| Power supply | Rated voltage | 24 V DC (operating voltage range: 21 V to 32 V DC)*1 | ||
| Power consumption | 0.6 W or less. | |||
| Compatible standards | CE marking | |||
| Compatible standards | EMC directive: EN61326-1 RoHS Directive: EN50581 | |||
| Immunity | Industrial electromagnetic environment | |||
| Electostatic discharge | IEC61000-4-2 | |||
| Electromagnetic field of radiated radio frequency | IEC61000-4-3*2 | |||
| Electric fast transient/burst | IEC61000-4-4 | |||
| Surge | IEC61000-4-5*3 | |||
| Conducted interference induced by radio frequency | IEC61000-4-6*2 | |||
| Emission | Class A | |||
| Radiated disturbance | CICPR 11 CLASS A | |||
| FCC Rules | Part15 CLASS A | |||
| Structure | Installation | Outdoor installation type | ||
| Installation method | Mounted on 50 A pole or wall | |||
| Protection code | IP65 | IEC60529, JIS C0920 | ||
| Case material | Aluminum alloy (coated with epoxy-denatured melamine resin) | |||
| Material of fittings | SUS304 | |||
| Material of hood | SUS304 (coated with epoxy modified melanine resin) | |||
| Material of window | Polycarbonate | |||
| Display element | Reflective monochrome LCD | |||
| External dimensions | 180 (W) mm × 155 (H) mm × 115 (D) mm (excluding mounting brackets) | |||
| Mass | Main body: approx. 2.8 kg, Hood and mounting brackets: approx. 1 kg | |||
- *1: The max. load resistance that can be connected is decided depending on the power-supply voltage.
Relation between power supply voltage and load resistance
- *2: The influence of the ORP reading by the electromagnetic field of radiated radio frequency or the conducted interference induced by radio frequency is within 6mV.
- *3: When the sensor cable, the transmission cable, or the contact input cable is extended by 30 m or more, the surge test under the EMC Directive for CE marking is not applied.
Note
Though an arrester (spark over voltage: 400 V) is implemented for transmission output, use a most suitable surge absorption element on the connection lines in accordance with the ambient environment, the situation of equipment installed, and the externally connected equipment.