Product name | pH meter | |||
---|---|---|---|---|
Model | HP-200 | |||
Combined sensor | Glass electrode | |||
Measurable range | pH | pH0 to pH14 (display range: pH−1 to pH15) | ||
Temperature | 0℃ to 100℃
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Display resolution capability | pH | 0.01 pH | ||
Temperature | 0.1℃ | |||
Efficiency | pH | Repeatability | Within ±0.03 pH (response for equivalent input) | |
Linearity | Within ±0.03 pH (response for equivalent input) | |||
Temperature | Repeatability | ±0.3℃ (response for equivalent input) | ||
Linearity | ±0.3℃ (response for equivalent input) | |||
Transmission output | Number of outputs | 2 (the negative terminals for transmission outputs are internally connected and at the same electric potential) | ||
Output type | 4 mA to 20 mA DC: input/output isolated type | |||
Load resistance | Max: 900Ω | |||
Linearity | Within ±0.08 mA (output only) | |||
Repeatability | Within ±0.02 mA (output only) | |||
Output range | Output 1 | pH: Selection from preset ranges or free range input within measuring range. | ||
Output 2 | Temperature: Free setting within a range between −20℃ and 130℃ | |||
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 output | Number of output | 5 | ||
Output type | No-voltage contact output | |||
Contact type | Relay contact; SPDT (1c) | |||
Contact capacity | 250 V AC, 3 A; 30 V DC, 3 A (resistance load) | |||
Contact function | R1, R2 | Selectable from upper limit alarm, lower limit alarm, ON/OFF control, and time-sharing proportional control. | ||
R3, R4 | Selectable from upper limit alarm, lower limit alarm, ON/OFF control, currently holding of transmission output, and cleaning output. | |||
FAIL | Error alarm | |||
Alarm setting range |
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Control function | ON/OFF |
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Control function | Time-sharing proportional control |
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Cleaning output | Number of outputs | 1 | ||
Output type | AC power control output (applied power supply voltage) | |||
Contact type | Relay contact, SPST (1a) | |||
Contact capacity | 250 V AC 0.5 A | |||
Contact function | Solenoid valve for cleaning control | |||
Settings | Cleaning period | 0.1 hours to 168.0 hours | ||
Cleaning time | 2 seconds to 600 seconds | |||
Hold time | 2 seconds to 600 seconds | |||
Timer accuracy | Within 2 minutes per month | |||
Description of cleaning operation | One of the following operations. | |||
Contact input | Number of inputs | 1 | ||
Contact type | No-voltage "a" contact for open collector | |||
Conditions | ON resistance: 100 Ω max. Open voltage: 24 V DC Short-circuit voltage: 12 mA DC max. | |||
Contact function | External input for cleaning or transmission holding if cleaner is not attached. | |||
Communication capability | Communication method | RS-485 | ||
Signal type | 2 wire system, isolated from the input circuit Not isolated from transmission circuit | |||
Temperature compensation | Applicable temperature element | Platinum resistor: 1 kΩ (0℃) | ||
Normal characteristic temperature-sensitive resistor: 500 kΩ (25℃), 6.8 kΩ (25℃),10 kΩ (25℃) | ||||
Element selection method | Automatic temperature sensor type detection or manual selection (no temperature element is selectable) | |||
Temperature compensation range | 0℃ to 100℃ | |||
Temperature calibration | 1 point calibration comparing reference thermometer | |||
Calibration | Calibration method | Auto or basic (manual) calibration | ||
Number of calibration points | Selectable from 1, 2, and 3 points | |||
Kinds of standard solutions | pH 2, 4, 7, 9, and 10 | |||
Any pH standard solution (with difference of 2 pH or more) for basic calibration | ||||
Additional capabilities | Automatic detection of kind of standard solution | |||
Automatic detection of electric potential stability | ||||
Automatic detection of calibration failure (asymmetry potential, sensitivity, or response time) | ||||
Calibration history (asymmetry potential, sensitivity, and number of days elapsed after last calibration) | ||||
Self-check | Calibration error | Asymmetry potential error, sensitivity error, and response time error | ||
Temperature calibration error | ||||
Standard solution detection error | ||||
Electrode diagnostic error | Cracking of glass response membrane | |||
Reference electrode impedance error (only applicable for differential circuit mode with a liquid ground electrode) | ||||
Temperature sensor short-circuit, temperature sensor disconnection, and deviation from temperature measurement range | ||||
Meter error | CPU error, ADC error, and memory error | |||
Operating temperature range | −20℃ to 55℃ (without freeze) | |||
Operating humidity range | Relative humidity: 5% to 90% (without condensation) | |||
Storage temperature | −25℃ to 65℃ | |||
Power supply | Rated power supply voltage | 100 V to 240 V AC ±10% 50/60 Hz | ||
Power consumption | 15 VA (max) | |||
Others | With power switch for maintenance use | |||
Compatible standards | CE marking | EMC    :EN61326-1      Class A, Industrial electromagnetic environment Safety   :EN61010-1 RoHS   :EN50581       9. Industrial monitoring and control instruments | ||
FCC rules | Part15 Class A | |||
Structure | Installation | Outdoor installation type | ||
Installation method | Mount 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 stainless steel (coated with epoxy-denatured melamine resin) | |||
Material of window | Polycarbonate | |||
Display element | Reflective monochrome LCD | |||
External dimensions | 180 (W) mm × 155 (H) mm × 115 (D) mm (excluding the fittings) | |||
Mass | Main body: Approx. 3.5 kg Cover and fittings: Approx. 1 kg |
- *1  :The standard for effect on the reading by the electromagnetic field of the radiated radio frequency and by the conducted interference is within the measured pH value ±0.25pH.
- *2  : 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
An arrester (spark over voltage: 400 V) is implemented for transmission output, contact input, and communication. However, 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.