Yokogawa ISC450 4-Wire Analyzer for Inductive Conductivity - Manual (Page 10)

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IM 12D06D05-01E
2. GENERAL SPECIFICATIONS OF EXAxt ISC450G
A) Input specifications : Compatible with the Yokogawa inductive conductivity ISC40 series with
integrated temperature sensor: NTC30k or Pt1000
B) Input range
Conductivity : 0 to 1999 mS/cm at 25 °C (77 °F) reference temperature
Minimum : 1 µS/cm (at process temperature)
Maximum : 2 S/cm (at process temperature)
Temperature : -20 to +140 ºC (0 to 280 ºF)
Cable length : max. 60 metres (200 feet)
10 metres (35 feet) fixed sensor cable + 50 metres (165 feet)
WF10 extension cable. Influence of cable can be adjusted by doing
an AIR CAL with the cable connected to a dry cell
C) Accuracy (under reference conditions):
Conductivity : ≤ 0.5 % of reading ± 1.0 µS/cm
Temperature : ≤ 0.3ºC (0.6ºF)
Temp.compensation: ≤1 % for NaCl, ≤ 3 % for Matrix
Step response : ≤ 4 seconds for 90 % (for a 2 decade step)
Note on performance specifications
The following tolerance is added to above performance.
mA output tolerance: ±0.02 mA of “4-20 mA“
D) Transmission signals
General : Two isolated outputs of 4-20 mA. DC with common negative. Maximum
load 600Ω. Bi-directional HART ® digital communication, superimposed
on mA1 (4-20 mA) signal.
Output function : Linear or 21-step table for Conductivity, Concentration or Temperature.
Control function : PID control.
Burn out function : Burn up (21.0 mA) or burn down (3.6 mA) to signal failure. acc.
NAMUR NE43.
Parameters : Adjustable damping
: Expire time
Hold : The mA-outputs are frozen to the last/fixed value during calibration/
commissioning
Cond. range : min span 10 µs/cm≥10% of high valve (20 mA)
max span 1999 mS/cm
E) Contact outputs
General : Four SPDT relay contacts with display indicators
Switch capacity : Maximum values 100 VA, 250 VAC, 5 Amps. (*)
Maximum values 50 Watts, 250 VDC, 5 Amps. (*)
Status : High/Low process alarms, selected from conductivity, concentration or
temperature. Configurable delay time and hysteresis
: PID duty cycle or pulsed frequency control
: FAIL alarm
Control function : On / Off
: Adjustable damping
: Expire time