Chauvin Arnoux C.A 6549 Manual De Instrucciones página 90

 To erase the entire memory
 Select Clear All by pressing
 The operation is confi rmed or cancelled by pressing
SET-UP
Clear Memory :
Select Data Sets to Clear
Clear All
4.5.3. CALCULATION OF   T FROM STORED DATA
The coeffi cient   T is used to calculate the insulation resistance at a temperature other than the
measurement temperature (see. § 4.3). It is the temperature difference at which the insulation resistance
concerned is reduced to half its value.. This coeffi cient is variable: it depends on the type of insulation.
When it is not known, the instrument can calculate it from three or more stored measurements.
Attention, these 3 measurements must have been made by the same device (identical insulation resistance)
but at 3 different temperatures, and the temperatures must have been recorded (function 2nd + T°) at
the same time as the measurements, without applying the correction (Resistance Correction OFF).
Procedure:
 In SET-UP, select Calculate   T from Memory
and press .
The display unit proposes all values recorded with
a temperature.
 Select at least 3 measurements using the
, or .
   T is calculated and recorded automatically
once 3 stored measurements have been
selected, and updated as more measurements
are selected.
 The larger the number of measurements, the
more accurate the calculation of   T.
.
SET-UP
! WARNING !
All data sets
will be cleared !
O.K.
CANCEL
,
90
.
SET-UP
Instr.Nr. 700016
SW Version 1.8
Calculate ΔT from Memory
Maximum Output Voltage
Set Defaut Parameter
Clear Memory
V Disturbance / V Output
Buzzer
Power Down
BaudRate
9600 / RS 232
SET-UP
ΔT Calculation fot R/2
Obj. Test Res.
47 99 228.5 MΩ
5078V
13 59 208.5 MΩ 5078V
13 58 178.5 MΩ
5078V
02 03
328.5 MΩ 5078V
02 02 328.5 MΩ
5078V
02 01 328.5 MΩ
5078V
01 02 328.5 MΩ 5078V
5100V
3%
On
On
23.7°C
Volt. Temp.
23°C
30°C
37°C
23°C
23°C
23°C
23°C