pH / ORP meter CP-250

Overview

The 250 series features a converter with built-in cleaning timer for practical use of functions without modification. A separate timer unit is unnecessary when used in combination with a cleaning unit thereby providing total cost-down operation.

Features

Common pH / ORP meter
One-touch calibration simply by immersing the electrode in standard solution and pressing the CAL key
Electrode characteristic quality determined automatically
Compatible with 5 types of temperature compensation elements
Utilizes large customized LCD
Can be combined with cleaning device
Built-in cleaning unit control function

Manufactured by HORIBA Advanced Techno

Specifications

Model	CP-250
Measuring system	pH: Glass electrode measurement method ORP: Metal electrode measurement method
Measurement range	pH: 0.00 14.00 ORP: ± 2000 mV
Reproducibility	pH ± 0.05 ORP ± 5 mV
Transmission output range	pH : 0.00 14.00 0.00 10.00 0.00 8.00 2.00 12.00 3.00 11.00 4.00 14.00 4.00 10.00 0.00 14.00 (Approved range) *Note 1: ORP: ± 1400 mV ± 1000 mV ± 700 mV ± 350 mV - 1000 0 mV 0 1000 mV 2000 mV 0 700 mV (Changeable with internal DIG switch)
Contact output	Number of contacts: 3 Contact output for cleaning (CLN) Contact form: Semiconductor (SSA) Relay, 1a Contact capacity: A C200 V 1 A (Alternating current load) Contact function: Electromagnetic drive for cleaning Warning contact output (RLY1) Contact form: Relay contact, 1a (No-voltage contact) Contact capacity: AC 250 V 2 A (Resistance load) Contact function: Upper limit warning, lower limit warning Possible to select one function from above (Changeable with DIP switch) Warning contact output (RLY2) Contact form: Relay contact, 1c (No-voltage contact) Contact capacity: AC 250 V 3 A (Resistance load) Contact form: Upper limit warning, lower limit warning, CLN synchronization (Synchronized with contact output for cleaning) Abnormal warning output Possible to select one function from above (Changeable with DIP switch)
Contact input	Number of contacts: 1 Contact form: Relay contact, 1a (No-voltage contact) Contact function: External input for cleaning operation Select one function from among the following; (1) "OR" operation with internal cleaning timer (Operates together with external output) (2) "AND" operation with internal cleaning timer (Operates only within external input range) (3) Internal cleaning timer synchronized to external input (4) Internal cleaning timer disabled (5) External input disabled
Transmission output	DC 4 20 mA Input / output isolated, Maximum load resistance 600 Ω Linearity 0.5 % FS
Control operation	Proportional time sharing ON / OFF Control: Upper limit operation (H) and lower limit operation (L) (Changeable with internal DIP switch) Upper / lower limit setting range: pH meter 0.00 14.00 pH ORP meter ± 2000 mV Control width: pH meter 0.01 4.00 pH (± 2.00 pH) ORP meter 1 999 mV (± 499 mV)
Calibration function	pH meter 2-point automatic calibration or manual calibration (Changeable with DIP switch) 2-point automatic calibration: Automatic determination of standard solution type Potential stability automatically determined Standard solution type pH 4, 7, and 9 (JIS) Standard solution combination (pH 4, 7) (pH 7, 9) Manual calibration: Standard solution type Discretionary: 2 pH or higher difference ORP meter Sensitivity calibration range 50.0 150.0 %
Additional function	Each error message type 1. Calibration error (Asymmetrical potential, sensitivity, response speed anomaly, standard solution anomaly) 2. Electrode diagnostic error Temperature sensor short, Temperature sensor tripped 3. Measurement out-of-range error Full scale over / under Alarm ON extension Extension time setting: 0 15 (minutes) Cleaning timer settings Cleaning cycle setting: 1 48 (hours) Cleaning time setting: 0.1 20.0 (minutes) Standby time after cleaning: 0.1 10.0 (minutes) Transmission output form setting when in hold due to calibration or cleaning Continuous, Hold (Previous value hold, Arbitrary hold) (Changeable with DIP switch) Dumping factor (Response time depends on average number of movements) Setting function Setting time: 1 50 times (0 20 seconds) Fixed period nozzle cleaning operation setting For each prescribed time period, cleaning is conducted at short intervals to prevent dirt from sticking to the nozzle. (5-second interval for 1-hour cycle : Hold operation is disabled for this operation.) (Changeable with DIP switch) Measured value shift function Setting range : pH: ± 2.00 pH ORP: ± 200 mV Transmission output hold arbitrary setting Setting range : Within measurement range
Temperature compensation element	500 Ω (25 °C) Other Compatible with 6.8 kΩ (25 °C), 350 Ω (25 °C), 1 kΩ (0 °C), or 10 kΩ (25 °C) (Changeable with internal DIG switch)
Temperature compensation range	0 100 °C) (For pH meter)
Ambient temperature & humidity	-5 50 °C, Less than 85 % RH
Power	AC 100 115 V 50 / 60 Hz 7 VA or AC 200 240 V 50 / 60 Hz 7 VA (Depends on setting)
Construction	Outside equipment: JIS C0920 Protection class: 3 (Rain-proof type) Installation procedure: 50 A pole or wall surface installation Case: Aluminum alloy casting (Paint color: DIC G-262 or equivalent) Full cover: Polycarbonate (Resin color: DIC G-262 or equivalent) Hood: SUS304 (Paint color: DIC G-262 or equivalent, or DIC PART2 2600 or equivalent) Mount fittings: SUS304
External dimensions	222 (W) x 180 (H) x 155 (D) (Mount fittings and protrusion not included)
Weight	Approx. 4 kg