Instructions

LWT-100 Operation | 8
B-H87.0.01.DB214-1.0 21 / 26
Zero point correction
T.OF
0.00
No zero point correction
-5.00 .. 5.00
Zero point correction in °C. and/or at °F -9.00 ..
9.00
Gradient correction of the temperature
T.SL
0.00
No gradient correction
-5.00 .. 5.00
Gradient correction in %
Gradient correction for the conductivity value
T.SL
1.000
No gradient correction
0.800 .. 1.200
Multiplier for the gradient correction
Formula
Zero point correction:
Displayed value = measured value – T.OF
Gradient correction °C:
Display = (measured value – T.OF) * (1 + T.SL / 100)
Gradient correction °F:
Display = (measured value – 32 °F – T.OF) * (1 + T.SL / 100) + 32 °F
Gradient correction γ:
Display = measured value / T.SL
Example calculation
Temperature
– Zero point correction T.OF to 0.00
– Gradient correction T.SL to 0.00
– Display unit UNIT to °C
– Display in ice water -0.2 °C
– Display in ice water setpoint T.OF = 0.0 °C
– Display in water bath 36.6 °C
– Display in water bath setpoint T.SL = 37.0 °C
– T.OF = display zero point correction – setpoint zero point
– T.OF = -0.2 °C – 0.0 °C = -0.2 °C
– T.SL = (setpoint gradient correction / (display gradient correction – T.OF) – 1) *100
– T.SL = (37.0 °C / (36.6 °C – (-0.2)) -1) *100 = 0.54
Conductivity
– Gradient correction S(L to 1.000
– Temperature compensation TCORR to OFF
– Control solution GKL 100 as reference
– Display in GKL 100 at 25 °C, setpoint = 1413 µS/cm
– Display = 1388 µS/cm
– S(L = setpoint / display value
– S(L = 1413 µS/cm / 1388 µS/cm = 1.018