Ph Slope Adjustment Using Deltav - Emerson ROSEMOUNT 5081-A Instruction Manual

MODEL 5081-A

13.9 pH SLOPE ADJUSTMENT USING Deltav

1. If the slope of the glass electrode is known form other measurements, it can be entered directly into the trans-
mitter. the slope must be entered as the slope at 25°C. to calculate the slope at 25°C from the slope at tem-
perature t°C, use the equation:
Changing the slope overrides the slope determined from the previous buffer calibration.
2. Access: deltaV Explorer/transducer Block/Properties, pH Compensation tab
Parameter: pH slope (PH_SLoPE)
Enter desired pH slope value.
94
slope at 25°C = (slope at t°C)
298
t°C + 273
SECTION 13.0
CALIBRATION - pH