HP-480TP

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.

Measuring range

pH: 0 - 14
Temperature: 0 - 100 ℃

Division: Process Water
Manufacturing Company: HORIBA Advanced Techno Co., Ltd.
  • Time sharing proportional control function with F Zone
    Unlike commonly used time sharing proportional control functions, whose on-off frequency has generally been fixed, the HP-480TP includes an control method called F Zone, whereby as the pH difference becomes smaller, it changes not just the time for which the pump injecting pH regulator is on, but also its frequency.
  • Compatible with five types of temperature compensation elements
    Five types of temperature compensation element are supported: 500 Ω, 6.8 kΩ, 1 kΩ, 10 kΩ and 350 Ω.
  • Easy pH correction
    After immersing the pH electrodes in the standard fluid, simply follow the instructions displayed and press the ENT key.
    The automatic correction process is plain and simple.
  • A line-up of lead-free pH electrodes
    Uses lead-free glass. In addition, almost all sections of the pH electrodes, including lead wires and soldered junctions are lead-free.
  • 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 nameIndustrial pH meter
ModelHP-480TP
Measuring range0 pH to 14 pH: 0.01 pH resolution.
Temperature 0℃ to 100℃: 1℃ resolution (selectable display).
Transmission
output
4 mA to 20 mA DC, input/output isolated type
Maximum load resistance 900 Ω
Transmission
output range
Free
Repeatability and
linearity
±0.05 pH, ±0.08 mA (for transmission output range of 0 pH to 14 pH)
Contact outputOutputs: 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.
Control operations

ON/OFF control

  • Upper and lower limits setting range: 0.00 pH to 14.00 pH
  • Control width: 0.00 pH to 4.00 pH (±0.00 pH to ±2.00 pH)
    Time-division proportional control
  • Upper and lower limits setting range: 0.00 pH to 14.00 pH
  • Proportional band: 0.00 pH to 4.00 pH
  • Cycle time: 5 s to 300 s
  • Control output shift capability: 0% to 50% of shift volume for the cycle time
  • Self-extending cycle time capability: The cycle time is extended automatically when the deviation value enters a set range (F zone) in proportion to the deviation value (This feature has no effect when the shift function has been enabled).
  • F zone: 1% to 100% of the proportional band (Self-extension of the cycle time starts working when the deviation enters the above range).
  • Upper limit for extending the cycle time: 0 s to 300 s.
  • Maximum control volume: 50% to 100% (To be applied regardless of whether the measured value is in the proportional band or not).
 
Calibration function2 points automatic calibration or manual calibration.
2 points automatic calibration: with automatic validation of the electrode
characteristics.
  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).
Transmission
output hold feature
 
  • Previous value hold
  • Optional value hold
  • Continuous
    Selectable from the above (However, only the previous value hold is available in the maintenance mode).
 
Self-diagnosis
function
 
  • Calibration function
    Asymmetry potential error, sensitivity error, response speed error and standard solution error.
  • Electrode self-diagnosis
    Temperature sensor short-circuit and temperature sensor disconnection.
  • Outside of the measuring range.
  • Converter error.
 
Temperature
compensation
element

Selectable from compensation ON (350Ω (25℃), 500Ω (25℃),1 kΩ (0℃),6.8 kΩ (25℃) and 10 kΩ (25℃)) and compensation OFF.

Temperature
compensated
range
0℃ to 100℃
Ambient
temperature
−5℃ to 45℃
Relative humidity20% to 85% (without dew condensation)
Storage
temperature
−25℃ to 65℃
Power supplyRated voltage 100 V to 240 V AC, 50Hz/60 Hz, 10 VA (max.)
StructureIndoor-use panel installation type
Panel case: ABS, Terminal: PBT
Panel: water proof structure
Protective structurePanel: IP65 (IEC60529, JIS C0920)
Rear case: IP20, Terminal: IP00
Class II device (IEC61010-1)
Pollution level 2 (IEC61010-1)
Conforming
standards
CE
Marking
EMC Directives: EN61326-1
Low Voltage Directive: EN61010-1
RoHS Directive: EN50581
Immunity
(Industrial electromagnetic environment)
Noise increase ±0.2 pH or less
FCC RuleFCC Part15
External
dimensions
48 (W) mm × 96 (H) mm × 115 (D) mm
Case depth: approx. 105 mm
MassApprox. 400 g

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