ABB AX410, AX411, AX416, AX450 and AX455 Single and dual input analyzers

• HCl– Cation exchanger outlet– Degassed cation conductivity– Semiconductor rinse and reclaim water

• NH3– Ammonia-treated make-up and boiler feed water– Condenser sampling applications– 

Hot well sampling applications– Before-cation column applications– Inferred pH in ammonia-dosed waters

• Ultra Pure Water (UPW) – Temperature effect of pure water only

• Linear– Manual entry of temperature coefficient

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‘Trim’ calibration

All ABB sensors are supplied pre-calibrated to exacting

tolerances. This enables installation without the need for any

further adjustment. The construction is robust and provides

highly stable measurements over the sensor’s lifetime.

The single-point calibration facility enables local adjustment

where on-site validation is required

Combined conductivity and pH

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

Dual input measurement for

critical duties

The AX400 enables two continuous measurements with

simultaneous local display and retransmission. This capability

provides an on-line validation of the process measurement.

Making two simultaneous measurements and configuring

one of the set points as a difference alarm provides

continuous on-line checking and early warning of an invalid

measurement.

AX41x configurable current outputs

The analyzer’s current outputs are fully galvanically isolated

and configurable as 4 to 20 mA, 0 to 20 mA or 0 to 10 mA. In

addition, AX400 conductivity analyzers offer the user a choice

in how the current output is configured:

• Linear

• 2-decade logarithmic

• 3-decade logarithmic

• Bi-linear with configurable break-point

• User-configurable between 0.1 and 100 % of total span

Bi-linear and logarithmic ranges effectively provide a split

output facility. General monitoring is covered with the lower

range while still supplying excellent discrimination during

high level excursions, such as during an alarm state

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>.

The US Pharmacopoeia has replaced the off-line qualitative

test of water impurities, such as chloride, with a composite

in-line Stage 1 Test based on conductivity.

Certification

To conform to USP<645> the accuracies of the instrument

display and the sensor’s cell constant are assured below

specified limits. Each AX450 or AX455 analyzer and model

2278 cell is supplied with a traceable test certificate.

Revalidation facility

ABB provides a revalidation facility for the 2278 conductivity

cell where the cell can be returned periodically for re

certification of the cell constant. This quick turnaround

facility fulfills the stringent certification requirements of

today’s pharmaceutical industry.

Recording USP<645>

Two standard current outputs, or four (optional), enable both

conductivity and temperature to be recorded externally as a

permanent record of compliance

Automatic stage 1 test

Maximum acceptable impurity levels are expressed by

USP<645> as uncompensated conductivity at 5 °C (9 °F)

increments. The Stage 1 test of PW and WFI requires both

parameters to be checked against the set limits.

The Stage 1 conductivity / temperature limits are stored

within the AX45X analyzer and can be activated on a limit

alarm contact. The alarm can be configured to initiate at a

safe working distance from the Stage 1 limit. This enables

assurance of operation to Stage 1 without manual

intervention

Display

Type

Dual 5-digit, 7-segment backlit LCD

Information

16-character, single line dot-matrix

Energy-saving function

Backlit LCD configurable as ON or Auto-Off after 60 s

Logbook*

Electronic record of major process events

and calibration data

Real-time clock*

Records time for logbook and auto-manual functions

Relay outputs – on/off

Number of relays

Three supplied as standard or five

with option board fitted

Number of set points

Three supplied as standard or five

with option board fitted

Set point adjustment

Configurable as normal or failsafe high / low

or diagnostic alert

Hysteresis of reading

Programmable 0 to 5 % in 0.1 % increments

Delay

Programmable 0 to 60 s in 1 s intervals

Relay contacts

Single-pole changeover

Rating 5 A, 115 / 230 V AC, 5 A DC

Insulation

2 kV RMS contacts to earth / ground

Analog outputs

Number of current outputs (fully isolated)

Two supplied as standard or four with option board fitted

Output range

• 0 to 10. 0 to 20 or 4 to 20 mA

• Analog output programmable to any value between

0 and 22 mA to indicate system failure

Accuracy

±0.25 % FSD, ±0.5 % of reading (whichever is the greater)

Resolution

0.1 % at 10 mA , 0.05 % at 20 mA

Maximum load resistance

750Ω at 20 mA

Configuration

Can be assigned to either measured variable or

either sample temperature

Digital communications

Communications

Profibus DP (with option board fitted)

Control function – AX410 only

Controller type

P, PI, PID (configurable)

Control outputs