ABB Measurement & Analytics AX410, AX411, AX416, AX450 and AX455

ABB Measurement & Analytics AX410, AX411, AX416, AX450 and AX455,Single and dual input analyzers for low level conductivity.

Overview of ABB Measurement & Analytics AX410, AX411, AX416, AX450 and AX455

The AX400 series

The AX400 analyzers incorporate the latest technology to provide highly reliable, flexible, feature-packed devices that satisfy a diverse range of process monitoring and control applications. The complete range encompasses solutions for pH/Redox (ORP), conductivity and dissolved oxygen. Models AX41x and AX45x enable continuous measurements of one or two low-level conductivity points with simultaneous local display and retransmission. The analyzers are used with ABB 2-electrode conductivity cells providing measurements with exceptional accuracy and performance. Model AX45x analyzers are dedicated to United States Pharmacopoeia <645>. AX400 Series analyzers are available for either wall-/pipe- or panel-mounting and are rated to IP65.

Cost effective

• select one or two conductivity inputs or combine conductivity and pH/Redox (ORP) in one analyzer

• integral PID controller (AX410) Reduced installation cost

• easy access terminations; reduced panel space High functionality at minimum cost

• conductivity, resistivity, difference, ratio, % passage, % rejection and inferred pH calculations Expanded monitoring and control

• add-on option board provides a total of five alarm relays and four current outputs

• service logbook providing historical data Energy saving

• high visibility, backlit display with auto switch-off function Reduced yearly maintenance costs

• 30 V DC option negates the need for costly safety tests Wide range of applicability

• water and waste water treatment

• power, pure water

• semiconductors

• chemicals

• pharmaceuticals

• pulp & paper

The AX411 analyzer

In low conductivity, ammoniated boiler waters, the AX411 analyzer can calculate an inferred pH measurement from the conductivity and a preset ammonia concentration. With this method, one AX411 provides cation conductivity, a direct output of pH, reduced cost and none of the maintenance associated with pH electrodes. Self-monitoring of the validity of the pH measurement is achieved by checking that an after-cation conductivity value is sufficiently low. This measurement is provided by the second input of the AX411 analyzer. Alarm contacts can be configured for cation conductivity, invalid pH and exhausted resin.

The AX41x and AX45x conductivity analyzers provide true temperature compensation for all high-purity water applications.

The AX416 version measures conductivity and pH with the same analyzer. The option board provides the capability to retransmit pH, conductivity and both sample temperatures. Five programmable alarms can be assigned to suit the needs of the application, enabling even the most demanding requirements to be met.

AX450 and AX455 USP <645> conductivity

AX450 and AX455 analyzers have been developed specifically with the guidance of major leading pharmaceutical manufacturers to produce a system fully compliant to USP<645>.

Specification of Conductivity – AX41x and AX45x

Range

Programmable 0 to 0.5 to 0 to 10,000 µS cm–1 (with various cell constants)

Minimum span 10 x cell constant

Maximum span 10,000 x cell constant

Units of measure µS cm–1, µS m–1, mS cm–1, mS m–1, MΩ-cm and TDS

Accuracy Better than ±0.01 % of span (0 to 100 µS cm–1) Better than ±1 % of reading (10,000 µS cm–1)

Operating temperature range –10 to 200 °C (14 to 392 °F)

Temperature compensation –10 to 200 °C (14 to 392 °F)

Temperature coefficient

Programmable 0 to 5 %/°C and fixed temperature

compensation curves (programmable) for acids, neutral salts and ammonia

Temperature sensor

Programmable Pt100 or Pt1000

Reference temperature 25 °C (77 °F)

Calculated variables – AX411

Ratio 0 to 19,999

Difference 0 to 10,000µS cm–1

Percent passage or rejection 0 to 100.0 %

Total dissolved solids 0 to 8,000 ppm

Inferred pH 7.0 to 10.0pH

(NH3-dosed systems) 7.0 to 11.0pH

(NaOH-dosed systems)*

* pH calculation according to the appendix in the VGB directive 450L, 1988.

pH /Redox (ORP) – AX416

Inputs

• pH or mV input and solution earth

• Temperature sensor Pt100, Pt1000 or Balco 3k

• Enables connection to glass or enamel pH and

reference sensors and Redox (ORP) sensors

Input resistance

• Glass >1 x 1013Ω

• Reference 1 x 1013Ω

Range –2 to 16 pH or –1200 to +1200 mV

Minimum span Any 2 pH span or 100 mV

Resolution 0.01 pH

Accuracy 0.01 pH

Temperature compensation modes

• Automatic or manual Nernstian compensation:

range –10 to 200 °C (14 to 392 °F)

• Process solution compensation with configurable

coefficient: range –10 to 200 °C (14 to 392 °F),

adjustable –0.05 to 0.02 %/°C (–0.02 to 0.009 %/°F)

Temperature sensor

Programmable Pt100, Pt1000 or Balco 3kΩ

Calibration ranges

Check value (zero point) 0 to 14 pH

Slope

Between 40 and 105 % (low limit user configurable)

Electrode calibration modes

Calibration with auto-stability checking

• Automatic 1 or 2 point calibration selectable from:

– ABB

– DIN

– Merck

– NIST

– US Tech

• 2 x User-defined buffer tables for manual entry,

2-point calibration or one-point process calibration