Accuracy – Digital Measurement (Includes Linearity, Hysteresis, and Repeatability)

pH Measurement (at 25°C/77°F Reference)

±0.009 pH with 3-wire, 1000 ohm RTD
±0.011 pH with 3-Wire, 100 Ω RTD
±0.011 pH with 2-Wire, 3000 Ω Balco RTD
±0.015 pH with 2-Wire, 1000 Ω RTD
±0.020 pH with 2-Wire, 100 Ω RTD
±0.009 pH with PH10-*S Smart Sensor

Accuracy–Solution Temperature (at 25°C/77°F Reference)

With 3-Wire 1000 Ω  Platinum RTD

±0.03°C (±0.05°F)

With 3-Wire 100 Ω Platinum RTD

±0.1°C (±0.18°F)

With 2-Wire 3000 Ω Balco RTD

±0.1°C (±0.18°F)

With 2-Wire 1000 Ω Platinum RTD

±0.3°C (±0.5°F)

With 2-Wire 100 Ω Platinum RTD

±0.5°C (±0.9°F)

PH10-*S Smart Sensor

± 0.03°C (±0.05°F)

Ambient Temperature Effect on Digital Measurement Accuracy

The effect listed below is for a 28°C (50°F) change in transmitter temperature within Normal Operating Condition limits, unless otherwise noted.

pH Measurement

±0.009 pH with 3-wire, 1000 Ω RT
±0.009 pH with PH10-*S Smart Sensor

ORP Measurement

±0.5 mV

ISE Measurement

±0.5 mV

ORP Measurement (at 25°C/77°F Reference)

±0.5 mV

ISE Measurement (at 25°C/77°F Reference)

±0.5 mV

Accuracy - Analog Output

Analog output accuracy is equal to the digital measurement accuracy plus an additional 0.04% of full span (4 to 20 mA).

Ambient Temperature Effect on Analog Output Accuracy

Digital Measurement effect plus an additional ±0.01% per °C

Ambient Temperature Effect on Solution Temperature Accuracy

The effect below is for a 28°C (50°F) change in transmitter temperature within Normal Operating Condition limits, unless otherwise noted.

With 3-Wire 1000 Ω Platinum RTD

±0.03°C (±0.05°F)

With 3-Wire 100 Ω Platinum RTD

±0.1°C (±0.18°F)

With 2-Wire 3000 Ω Balco RTD

±0.1°C (±0.18°F)

With 2-Wire 1000 Ω Platinum RTD

±0.3°C (±0.5°F)

With 2-Wire 100 Ω Platinum RTD

±0.5°C (±0.9°F)

PH10-*S Smart Sensor

± 0.03°C (±0.05°F)

Relative Humidity Effect (5 to 95% RH)

No effect for noncondensing environments.

Supply Voltage and Load Effect

Digital

Less than 0.005% of full scale/V

Analog

Less than 0.005% of analog scale/V, in addition to digital effect.

Mounting Position Effect

Transmitter meets reference accuracy specifications for all mounting positions