DC402G Dual Cell Conductivity/Resistivity Converter

Brand: Yokogawa Electric Corporation

Flexibility, reliability and low maintenance are among the benefits provided by the DC402G conductivity analyzer.

Designed to meet the exacting requirements of measuring dual cell conductivity and resistivity in the modern industrial environment, it contains many features to ensure the best precision whatever the application.

Differential, ratio, deviation. % passage or % rejection can be indicated and/or transmitted.

This 4-wire converter is housed in a robust IP 65, NEMA 4X, CSA Type 3S field mountable case. Two mA outputs, four relays and a clear LCD make the DC402G a truly comprehensive package.

The DC402G features PI control on the auxiliary mA output and the pulse proportional relay outputs, thus avoiding the need for a separate controller.

The famous EXA sensor diagnostics are also present in the DC402G. Self-tuning of the excitation frequency and measuring pulses ensure optimum accuracy.

The polarization check gives on line indication of sensor fouling and early warning that maintenance is needed.

A wide variety of temperature compensation possibilities (NaCl according to IEC 60746-3, manual TC, preprogrammed matrices and a freely programmable 5 x 5 matrix), provides a high-accuracy measurement with minimum effort.
Features
  • Differential, ratio or calculated outputs
  • Universal conductivity/resistivity, software switchable
  • On-line sensor checking
  • Self-tuning measuring signal
  • Matrix temperature compensation for pure water applications
  • Four fully configurable SPDT contact outputs
  • Two fully configurable mA outputs
  • Built-in PI controller
  • Easy to use EXA control panel
  • USP monitoring

Specifications

Accuracy

  • ± 0.3° C (± 0.54° F) - Pt1000 Ω, Ni100 Ω & PB36 NTC
  • ± 0.4° C (± 0.72° F) - Pt100 Ω & 8k55 Ω
  • ± 0.5 % of Full Scale - Conductivity & Resistivity

Alarm

  • High/Low

Ambient Temperature Range

  • -10° to 55° C (14° to 131° F) - Ambient Operating Temperature

Applications

  • Controlling Blow-Down of Cooling Towers (Ratio Output)
  • Controlling Flowrate of Wash Water (Differential Output)
  • Leak Detection of Heat Exchanges (Deviation Output)
  • Monitoring Performance of Reverse Osmosis Columns (Percent Rejection Output), Monitoring Performances of Cation Exchange Columns (Ratio Output)
  • Monitoring Very High Purity Systems (Differential Resistivity)
  • Pharmaceutical Water Monitoring (USP)
  • Redundancy for Accurate Analysis (Deviation Output)

Approvals & Certifications

  • CSA C22.2 No. 94.2
  • EMC: EN 61326-1 Class A, Table 2 & EN 61326-2-3 & EN 61000-3-2 Class A & EN 61000-3-3
  • KC
  • RCM: EN 61326-1 Class A
  • UL Standard No. 61010-1 & 50E

Burn-Out

  • Burn Down 0/3.5 mA to Signal Failure
  • Burn Up 22 mA

Cable Entry

  • Six PG 13.5 Nylon Glands

Cable Length

  • 200 feet (60 metres)

Compensated Temperature

  • 0° to 80° C (32° to 175° F)

Conduit Connection

  • 1/2” NPT Female - Adapter
  • G 1/2” Female - Adapter

Consumption

  • Maximum

Control Functions Characteristics

  • ON/OFF

Display

  • 6 Alphanumeric Characters, 0.27” (7 mm) High - Message Display
  • LCD Display
  • Main Display: 3-1/2-Digits, 0.49” (12.5 mm) High

Electrical Connectors

  • 26 to 14 AWG (0.13 to 2.08 mm²)
  • Cable Terminals up to 14 AWG (2.5 mm²) Finished Wires

Electrical Rating

  • Maximum

Enclosure Finish

  • Chemically Resistant Coating
  • Moss Green - Cover Color
  • Off-White - Case Color

Environmental Protection

  • IP65
  • NEMA 3S
  • NEMA 4X

Frequency

  • 50/60 Hz - Supply Frequency Rating

Function

  • 3-Digit Programmable Password

Humidity

  • 10 to 90 % Relative Humidity, Non-Condensing

Indication

  • LED

Linearity

  • ± 0.3° C (± 0.54° F) - Pt1000 Ω, Ni100 Ω & PB36 NTC
  • ± 0.4° C (± 0.72° F) - Pt100 Ω & 8k55 Ω
  • ± 0.5 % of Full Scale - Conductivity & Resistivity

Load

  • Maximum

Mounting

  • Panel
  • Pipe
  • Wall Mounted

Output

  • 0-20 mA DC - Isolated Transmission Signals with Common Negative
  • 4-20 mA DC - Isolated Transmission Signals with Common Negative

Repeatability

  • ± 0.3° C (± 0.54° F) - Pt1000 Ω, Ni100 Ω & PB36 NTC
  • ± 0.4° C (± 0.72° F) - Pt100 Ω & 8k55 Ω
  • ± 0.5 % of Full Scale - Conductivity & Resistivity

Resistance

  • 0.00 Kiloohm/C to 999 megaohms/C at 25° C (77° F) Reference Temperature
  • Maximum
  • Minimum 40 ohms/C at Process Temperature

Sensor, Probe Type

  • Ni100
  • Pt100
  • Pt1000

Span - Maximum

  • 1,500 ms/cm, 999 megaohms x cm - Conductivity/Resistivity
  • 250° C (500° F)

Span - Minimum

  • 0.010 μS/cm, 0.001 kiloohms x cm - Conductivity/Resistivity
  • 25° C (50° F)

Storage Temperature

  • -30° to 70° C (-20° to 160° F)

Supply Voltage

  • 115 Vac - Rating
  • 230 Vac - Rating
  • 97.8-264.5 Vac - Applicable Range

Switch Type

  • 4 SPDT Relay Contacts

Temperature Range

  • 0° to 100° C (32° to 212° F) - Programmable Reference Temperature
  • -10° to 120° C (14° to 248° F) - 8K55 NTC
  • -20° to 120° C (-4° to 248° F) - PB36 NTC
  • -20° to 200° C (-4° to 392° F) - Pt100 & Ni100
  • -20° to 250° C (-4° to 482° F) - Pt1000

Window Material

  • Polycarbonate

  • Monitoring performances of cation exchange columns (Ratio output)
  • Leak detection of heat exchanges (Deviation output)
  • Monitoring performance of reverse osmosis columns (Percent rejection output)
  • Controlling flowrate of wash water (Differential output)
  • Controlling blow-down of cooling towers (Ratio output)
  • Redundancy for accurate analysis (Deviation output)
  • Monitoring very high purity systems (Differential Resistivity)
  • Pharmaceutical water monitoring (USP)
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