AQM-100A Resistivity Analyzer/Controller0 pages

Resistivity Analyzer/Controller

AQM-100A

The AQM-100A is a compact and lightweight panel
type resistivity analyzer. This model, which allows for a
wide range of temperature compensations from 0 to
100°C, is suitable for measuring the resistivity of ultrapure water (0 – 20MΩ·cm) used in semiconductor manufacturing plants, etc. The 4 – 20mADC transmission output and alarm contact output (2 circuits, contact “c”)
come standard. Various features include sample water
temperature display.

Features
Compact DIN 96 size
Features compact and lightweight design –
Dimensions: 96mm x 96mm (DIN standard) x 90mm
Temperature compensation through microprocessor
calculations
Comparing to analog-type instruments, highly accurate
temperature compensation is achieved with a wider
temperature range covered.
Suitable for high-temperature applications up to 99.9°C
The unit can be used for measurements during hot
water sterilization processes for ultra-pure water.
2 detectors connectable (optional feature)
Water quality index at 2 different locations can be displayed; this is selectable by key operation. However,
note that transmission output and alarm contact output
correspond to the selected detector only.
Temperature display
As well as resistivity, sample water temperature can
also be monitored at each point of measurement.
The model operates on a universal AC power supply at
90 – 264VAC.

Cell constant adjustable
When replacing the detector to a new one, the cell constant can be easily adjusted by key operation . This
ensures the value to be measured accurately.
2 alarm points setting available
2 alarm points corresponding to measured values can
be set; low-limit alarm and lower-low-limit alarm or
upper-limit alarm and lower-limit alarm. If the measured
value falls below the set point, the corresponding LED,
“ALM 1” or “ALM 2,” illuminates and no-voltage contact
will be activated.
Isolated 4 – 20mADC transmission output signals
2 isolated 4 – 20mA signals are available for connection to any external device.
Easy determination of detector and transmitter quality
By removing the detector’s connector and replacing it
with an equivalent resistance calculator, whether a
fault is caused by the detector’s side or transmitter’s
side (including the cable) can be assessed.
RS-232C interface (optional feature)
Resistivity and solution temperature data can be output
via RS-232C connection.

Configuration
Field site

Detector

Local panel/Instrument room
Controller
Model AQM-100A

EC-10 Extension cable

Model AR
(2 detectors connectable)

Transmission output

(Max. 100 m)

4-20mADC

ON-OFF
AC 90-264V

Receiver

Alarm contact output
Power supply

Recorder
Controller, etc