Panel-mount Type pH Meter (Four-Wire Transmission, Industrial Time sharing Proportional Control)
HP-480 connects pH sensor and measures pH and temperature in the sample water. Suitable for monitoring and control of various production processes and wastewater treatment, etc. Many types of electrodes are available to match the sample properties.
HP-480TP is a pH meter with a time sharing proportional control function, making it ideal for tasks such as interval processing in any type of control process.
Unlike commonly used time sharing proportional control functions, whose on-off frequency has generally been fixed, the HP-480TP includes our independently developed control method optimized for pH control, F Zone, whereby it changes its frequency as the difference becomes smaller.
pH: 0 - 14
Temperature: 0 - 100 ℃
|Product name||Industrial pH meter|
|Measuring range||0 pH to 14 pH: 0.01 pH resolution.|
Temperature 0℃ to 100℃: 1℃ resolution (selectable display).
|4 mA to 20 mA DC, input/output isolated type|
Maximum load resistance 900 Ω
|±0.05 pH, ±0.08 mA (for transmission output range of 0 pH to 14 pH)|
|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||2 points automatic calibration or manual calibration.|
2 points automatic calibration: with automatic validation of the electrode
Types of standard solution: pH 2, pH 4, pH 7, pH 9 and pH 10 (JIS)
Combination of standard solutions: pH 7 and one of the others
Manual calibration: Freely selectable, but the difference should be over 2 pH.
Temperature calibration (one point).
output hold feature
Selectable from compensation ON (350Ω (25℃), 500Ω (25℃),1 kΩ (0℃),6.8 kΩ (25℃) and 10 kΩ (25℃)) and compensation OFF.
|0℃ to 100℃|
|−5℃ to 45℃|
|Relative humidity||20% to 85% (without dew condensation)|
|−25℃ to 65℃|
|Power supply||Rated voltage 100 V to 240 V AC, 50Hz/60 Hz, 10 VA (max.)|
|Structure||Indoor-use panel installation type|
Panel case: ABS, Terminal: PBT
Panel: 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)
|EMC Directives: EN61326-1|
Low Voltage Directive: EN61010-1
RoHS Directive: EN50581
(Industrial electromagnetic environment)
Noise increase ±0.2 pH or less
|FCC Rule||FCC Part15|
|48 (W) mm × 96 (H) mm × 115 (D) mm|
Case depth: approx. 105 mm
|Mass||Approx. 400 g|
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