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µAI 8231

Ion-Selective Fluoride Analyzer / Monitor

THIS PRODUCT IS DISCONTINUED

The Micro µAI 8231 Fluoride Analyzer / Monitor uses a fluoride ion-selective electrode in conjunction with a reference electrode mounted in a temperature controlled flow cell. Pretreatment of the sample with a reagent solution is used to adjust the pH, decomplex the fluoride ions in solution, and remove the effects of changes in ionic strength in the sample.

Range of measurement on the fluoride analyzer can be set to any two consecutive decades of concentration between 0.1 and 1000 ppm.

µAI 8231 - Ion-Selective Monitor for Fluoride

The current outputs of the fluoride analyzer can be used to view any window within the range to which the instrument is set, e.g. in control of fluoridation a window of 0.1 to 1.5 ppm provides optimum discrimination at the control point, i.e., 1 ppm.

Under normal conditions, with suitable standards and calibration frequencies, accuracies better then ±5% of reading or ±0.1 % ppm, whichever is greater, can be achieved.

FEATURES

• Fully Automatic Two Point Calibration		• Simple to Maintain



• High Sensitivity		• Highly Reliable Components



• Microprocessor Based Ease of Operation		• Reduced Reagent Consumption



• Complete Technology From One Company		• Low Maintenance Liquid Handling

INSTALLATION GUIDELINES

Sample Flow:
5 - 750 ml/min

Suspended Solids:
<10 ppm, <5 microns

Ambient Temperature:
Normally within the range 5- 40°C

Sample Temperature:
Within 20°C of the ambient temperature

Reagent Solutions:
Consumption of each reagent is 10 liters per month.

µAI-8231 Fluoride Analyzer / Monitor (1 Reagent)
Sodium hexametaphosphate, sodium chloride and di-sodium EDTA

Calibration Solutions:
Two solutions each of one liter are required. The concentrations and formulations are suited to range and application. Consumption is 50 to 80 ml per calibration.

GENERAL SPECIFICATIONS

Range:
User configurable to any two consecutive decades of concentration between 0.05 and 5000 ppm depending on analysis.

Repeatability:
±2% of reading.

Reproducibility:
±3% of reading.

Response Time:
Less than 5 minutes for 90% step change.

Millivolt Range:
-1000 to + 1000mV.

Millivolt Resolution:
±0.1 mV.

Control Temperature Range:
30 to 45°C.

Temperature Resolution:
±0.1 °C.

Displays:
Concentration: -5 digit blue fluorescent
Information: -20 character dot matrix blue fluorescent

Status Indication:
Two flashing LEDs in alarm state.
Single LED lit when 'HOLD' switch operated.
Single LED lit when calibration is in progress.
Single LED lit when the monitor is 'Out of Service'.

Current Outputs:
As standard one isolated current output 0-1, 0-10, 0-20, or 4-20mA selectable via plug-in links.

Current Output Span:
Any 1 to 2 decades of display range, ogarithmic or linear.

Computer Interface:
Optional second current output or RS422/RS423 serial interface.

Alarms:
Two high or low concentration alarms. Remote calibration in progress indication. Remote 'Out of Service' indication. All voltage free 250V, 5A non-inductive relay contacts.

Concentration Alarm Adjustment:
Programmable over assigned range.

Concentration Alarm Differential:
0 to 5%.

Concentration Alarm Delay:
0 to 60 minutes.

Programmable Date Retention:
3 years.

Calibration:
Fully automatic two point, plus manual initiation on demand.

Routine Maintenance:
Once a month: Replenish reagents, clean flow system. Once a year: Replace pump tubing and pump capstans.

Power Supply:
110-120V or 220-240V, 50/60Hz, 100VA.

Power Supply Tolerance:
+6% to -20%.

Isolation Voltage:
Input, output and power supply 1.5kV.

Dimensions:
Height: 34-3/4" (883mm)
Width: 20-9/10" (531 mm)
Depth: 7-4/5" (199mm)

Degree of Protection:
Electronics Section: NEMA 4X.
Liquid Handling: Critical internal components NEMA 4X.