Yokogawa EXA DC402 Dual-Channel Conductivity Analyzer - Manual (Page 8)

IM 12D08E02-01E
Specification 2-1
2-1. General specifications
A. Input specifications
: Two inputs , each 2-electrode
measurement with square wave
excitation, using cell constants(C)
from 0.008 to 50.0 cm -1 , with up
to 60 metres (200ft) connection
cable.
B. Detection method
: Frequency, read-pulse position
and reference voltage are
dynamically optimized.
C. Input ranges
Minimum : 1µS x C at process tem perature
(underrange 0.000 µS/cm).
Maximum : 25 mS x C at process tem perature
(overrange 30 mS x C).
-Resistivity : 0.00 kΩ - 999 MΩ/C at 25 °C
(77 °F) reference temperature.
Minimum : 40 Ω/C at process temperature
(underrange 0.001 kΩ x cm).
Maximum : 1 MΩ/C at process tem pera ture
(overrange 999 MΩ x cm).
-Temperature
Pt1000 : -20 to +250 °C (0 to 500 °F)
Pt100 and Ni100
: -20 to +200 °C (0 to 400 °F)
8K55 NTC : -10 to +120 °C (10 to 250 °F)
PB36 NTC : -20 to +120 °C (0 to 250 °F)
D. Span
Conductivity/Resistivity
- Min. span : 0.010 µS/cm; 0.001 kΩ x cm
up to 90% maximum zero
suppression.
- Max. span : 1500 mS/cm; 999 MΩ x cm
Ratio (cell1/cell2)
- Min. span : 00.0
- Max. span : 19.99
Difference (cell1- cell2)
- Min. span : 0.010 µS/cm
- Max. span : 400 mS/cm
% Passage (100x[cell2/cell1] )
- Min. span : 00.0
- Max. span : 199.9
% Rejection (100x[( cell1-cell2)/cell1] )
- Min. span : 0.1
- Max. span : 400
% Deviation (100x[ (cell2-cell1)/cell1] )
- Min. span : 0.1
- Max. span: 400
VGB-directive 450 L
- Min. span : 1.0 pH
- Max. span : 14.0 pH
Temperature
- Min. span : 25 °C (50 °F)
- Max. span : 250°C (500 °F)
Difference Temperature
- Min. span : 25 °C (50 °F)
- Max. span : 250 °C (500 °F)
E. Transmission Signals
: Two isolated outputs of 0/4-20
mA DC with common negative.
Max. load : 600 Ω.
Auxiliary output can be chosen
from conductivity, linearized
conductivity, resistivity,
temperature, differential
temperature calculated value
or PI control of conductivity/
resistivity.
Burn up (22 mA) or Burn down
(0/3.5 mA) to signal failure.
F. Temperature compensation
: Automatic, for temperature
ranges mentioned under C
(input ranges).
- Reference temperature
: programmable from 0 to 100 °C
or 30 to 210 °F (default 25 °C).
G. Compensation algorithm
: According IEC 60746-3
NaCl tables (default). Two
independent user programmable
temperature coefficients, from
0% to 3.5% per °C (°F) by
adjustment or calibration.
- Matrix compensation
: with conductivity function
of concen-tration and
temperature. Choice of 5
preprogrammed matrixes
and a 25-points user-
programmable matrix.
2. DC402G SPECIFICATIONS