Calculation Of Δt From Stored Data - AEMC 5070 User Manual

4.10 Calculation of ΔT from Stored Data
The coefficient ΔT is used to calculate the insulation resistance at a temperature
other than the measurement temperature. It is the temperature difference at which
the insulation resistance concerned is divided by 2.
This coefficient is variable and depends on the type of insulation. When it is not
known, the instrument can calculate it from three or more stored measurements.
NOTE: These 3 measurements must have been made on identical insu-
lation but at 3 different temperatures, and the temperatures must have
been recorded using the 2nd + TEMP buttons at the same time as the
measurements, without applying the correction (Resistance Correction
OFF).
• In the SET-UP mode, select "Calculate ΔT from Memory" and press the
► button. The display shows all values recorded with a temperature.
• Select at least 3 measurements using the ▲ , ▼ , ◄ , ► buttons.
• ΔT is calculated and recorded automatically once 3 stored measure-
ments have been selected, and will be updated if more measurements
are selected.
• The larger the number of measurements, the more accurate the calcula-
tion of ΔT.
NOTE: This calculation is available only for resistance values < 200GΩ.
SET-UP
Instr.Nr. 9600004
Calculate ∆T from Memory
Maxumum Output Voltage
Set Default Parameter
Clear Memory
V Disturbance / V Output
Buzzer
Power Down
Baud Rate
Megohmmeter Model 5070
SW Version 1.2
5100V
10%
on
on
9600 / RS232
SET-UP
∆T Calculation for R/2
Obj. Test Res.
47 99 228.5MΩ
13 59 208.5MΩ
13 58 178.5MΩ
02 03 328.5MΩ
02 02 328.5MΩ
02 01 328.5MΩ
23.7°C
Volt. Temp.
5078V 23°C
5078V 30°C
5078V 37°C
5078V 23°C
5078V 23°C
5078V 23°C
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