60
Sensor cleaning function
Configurable cleaning action relay contact
Continuous
Pulse in 1s on and off times
Frequency
5 minutes to 24 hours, fully configurable
Duration
15s to 10 minutes, fully configurable
Recovery period
30s to 5 minutes, fully configurable
Electrode Calibration Modes
Calibration with auto-stability checking
Automatic 1 or 2 point calibration selectable from:
ABB
DIN
Merck
NIST
US Tech
2 x User-defined buffer tables
manual entry or 2-point calibration
one-point process calibration
Calibration Ranges
Zero point
0 to 14pH
Slope
Between 40 and 105% (low limit user configurable)
Outputs and Set Points
Number of set points
3 if relay control, 5 with option card
Number of relays
4 standard, 2 standard and 2 control
Retransmission outputs
2 (4 optional) fully-isolated standard
Environmental Data
Operating temperature limits
–20 to 65
°
C (–4 to 149
°
F)
Storage temperature limits
–25 to 75
°
C (–13 to 167
°
F)
Operating humidity limits
Up to 95%RH non condensing
EMC
Emissions and immunity
Meets requirements of:
EN61326 (for an industrial environment)
EN50081-2
EN50082-2
Analog Retransmission
Number of signals
Two, fully-isolated outputs supplied as standard
Four, fully-isolated outputs when ordered with option card
Output current
0 to 10mA, 0 to 20mA or 4 to 20mA
Analog output programmable to any value between
0 and 22mA to indicate system failure
Accuracy
±
0.25% FSD,
±
5% of reading
Resolution
0.1% at 10mA 0.05% at 20mA
Maximum load resistance
750
Ω
at 20mA
Configuration
Can be assigned to either measured variable or
either sample temperature
Serial communications
Modbus serial data interface
…SPECIFICATION