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General Specifications
Performance (Accuracy)
(The specifications are expressed with simulated inputs.)
Basic
pH
Linearity
Repeatability
Accuracy
:±
0.01 pH
: ±0.01 pH
: ±0.01 pH
ORP
Linearity
Repeatability
Accuracy
:±
1 mV
: ±1 mV
: ±1 mV
Measurement Parameter
The FLXA21® can be configured to measure:
• pH/Oxidation-reduction Potential (pH/ORP)
• Contacting Conductivity (SC)
• Inductive Conductivity (ISC)
• Dissolved Oxygen (DO)
Note: T
he available measurement parameter depends on a
sensor module installed in the analyzer.
Analyzer Structure
Module structure
Composition of Analyzer
One (1) Base module General Purpose
• CSA, FM, ATEX, (pending)
• FOUNDATION Fieldbus, (pending)
• PROFIBUS (pending)
One (1) or two (2) Sensor modules inputs
The FLXA21® supports up to two sensors of the same type,
thereby reducing installation costs.
Allowable combinations when two modules are installed are:
• pH/ORP and pH/ORP
• SC and SC
• DO and DO
pH/Redox Potential (pH/ORP)
Input Specification
Dual high impedance input (≥1012 Ω), compatible with all
Yokogawa pH/ORP sensors and most competitor electrodes.
Temperature:
Pt1000
Pt100
6k8
PTC10k
NTC 8k55
3k Balco
PTC500
with Pt100
Linearity
Repeatability
Accuracy
Calibration
Semi-automatic 1 or 2 point calibration using pre configured
NIST, US, DIN buffer tables 4, 7 & 9, or with user defined buffer
tables, with automatic stability check; or Manual adjustment to
grab sample.
Input Range
Conductivity
: - 2 to 16 pH
: -1500 to 1500 mV
: 0 to 100 rH
:
:
:
:
:
:
:
-30
-30
-30
-30
-10
-30
-30
to
to
to
to
to
to
to
140
140
140
140
120
140
140
°C
°C
°C
°C
°C
°C
°C
(-22
(-22
(-22
(-22
(-22
(-22
(-22
Input Specification
Two or four electrode measurement with square wave excitation.
Any cell constant from 0.005 to 50.0 cm-1 can be used.
Influence of cable can be adjusted by doing an AIR CAL with the
cable connected to a dry cell.
to
to
to
to
to
to
to
284°F)
284°F)
284°F)
284°F)
284°F)
284°F)
284°F)
Resistivity
Temperature:
Pt1000
Pt100
Ni100
NTC 8k55
Pb36(JIS NTC 6k)
Cable length
Cable length
Output Range
pH
ORP
rH
Temperature
:±
0.4 ºC
: ±0.1 ºC
: ±0.4 ºC
Conductivity (SC)
Measurement
Input Range
pH
ORP
rH
Temperature
(with Pt1000, 6k8, PTC10k, NTC 8k55, 3k Balco, PTC500)
Linearity
: ±0.3 ºC
Repeatability
: ±0.1 ºC
Accuracy
: ±0.3 ºC
:6
0 meters (196 feet) from the sensor
to the analyzer
:
:
:
:
:
:
:
:
GS 12A01A02-01E-E
min. Span 1 pH
max. Span 20 pH
min. Span 100 mV
max. Span 3000 mV
min. Span 2 rH
max. Span 100 rH
min. Span 25 ºC
max. Span 200 ºC
(for 8.55kV NTC sensor max. 120 ºC)
Output Range
Conductivity
Resistivity
Temperature
:m
in. 0 µS/cm
: max. 200 mS x Cell constant
(over range 2000 mS/cm)
: min. 0.005 kΩ / Cell constant
: max. 1000 MΩ x cm
:
:
:
:
:
- 20
-20
-20
-10
-20
to
to
to
to
to
250
200
200
120
120
ºC
ºC
ºC
ºC
ºC
(-4 to 482°F)
(-4 to 392°F)
(-4 to 392°F)
(14 to 248°F)
(-4 to 248°F)
:6
0 meters (196 feet) from the sensor
to the analyzer. Influence of cable can
be adjusted by doing an AIR CAL
with the cable connected
to a dry cell.
:m
in. 0.01 µS/cm
: max. 2000 mS/cm
(max 90% zero suppression)
: min. 0.001 kΩ x cm
: max. 1000 MΩ x cm
(max 90% zero suppression)
: min. 25 ºC (77°F)
: max. 200 ºC (392°F) (for NTC 8k55
sensor max. 120 ºC (248°F))