Offset Correction
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6-6
6.7 Offset Correction
An offset correction must be carried out for the following measurement functions and
ranges:
Measurement Function Measurement Ranges
Vdc 300mV, 3V, 30V, 300V, 1000V
Vac 200mV, 2V, 20V, 200V, 700V
Idc 300µA, 3mA, 30mA, 300mA, 2A
Iac 200µA, 2mA, 20mA, 200mA, 2A
Ω2W 300Ω, 3kΩ, 30kΩ, 300kΩ, 3MΩ, 30MΩ
Ω4W 300Ω, 3kΩ, 30kΩ, 300kΩ, 3MΩ, 30MΩ
Table: Offset Correction for Measurement Functions
In order to eliminate thermoelectric voltage and lead resistance, and to correct the
zero-point, an Offset Correction must be carried out for each measurement function.
A correction of the zero-point is possible, when the existing deviation is less than
approx. 0.2% of the range’s full-scale value for DC Voltage measurements, or approx.
5% for all other functions.
If the deviation is greater, the message “Offset too high” is displayed.
Offset values that are too large can be adjusted in the “Offset” Math Program.
Note: To achieve a correct zero-point alignment, a warm-up period of at least two
hours should be observed.
After switching functions and ranges, you should wait for a running period of
at least two measurements before carrying out an offset correction.
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