Emerson Rosemount 56, Instruction Manual

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8 Description and Specifications
Section 1: Description and Specifications Instruction Manual
April 2017 LIQ-MAN-56
1.6 pH/ORP (Codes -22 and -32)
For use with any standard pH or ORP sensors. Measurement choices are pH, ORP, Redox,
Ammonia, Fluoride or custom ISE. The automatic buffer recognition feature uses stored buffer pH
values and their temperature curves for the most common buffer standards available worldwide.
The analyzer will recognize the pH value of the buffer being measured and perform a self
stabilization check on the sensor before completing the calibration. Manual or automatic
temperature compensation is menu selectable. Change in process pH due to temperature can be
compensated using a programmable temperature coefficient. For more information concerning
the use and operation of the pH or ORP sensors, refer to sensor product data sheets. The 56 can
also derive an inferred pH value. Inferred pH can be derived and displayed when two contacting
conductivity sensors are used.
Performance Specifications (pH input) - Analyzer
Measurement Range [pH]: 0 to 14 pH
Accuracy: ±0.01 pH
Diagnostics: glass impedance, reference impedance
Temperature coefficient: ±0.002pH / °C
Solution temperature correction: pure water, high pH (dilute base), Ammonia and custom
Buffer recognition: NIST (including non-NIST pH 7.01 buffer), DIN 19267, Ingold, Merck, and
Fisher
Input filter: Time constant 1 - 999 sec, default 4 sec.
Response time: 5 seconds to 95% of final reading
Recommended Sensors for pH:
Compatible with standard pH sensors with and without integral preamps. Supports Smart
pH sensors from Rosemount (includes Smart integral preamps).
Performance Specifications (ORP input) - Analyzer
Measurement Range [ORP]: -1500 to +1500 mV
Accuracy: ± 1 mV
Temperature coefficient: ±0.12mV / °C
Input filter: Time constant 1 - 999 sec, default 4 sec.
Response time: : 5 seconds to 95% of final reading
Recommended Sensors for ORP:
Compatible with standard ORP sensors with and without integral preamps.
NOTE:
Some older sensor preamps august not be compatible with the 56 (contact the factory for details).
General purpose and high
performance pH 396PVP,
3900VP and 3300HT sensors