Chauvin Arnoux C.A 6549 Mode D'emploi page 55

Case 1
You select an insulation measurement with a fixed /
standard test voltage, in manual mode.
Positions :
500V - 2TΩ Ω Ω Ω Ω
1000V - 4TΩ Ω Ω Ω Ω
2500V - 10TΩ Ω Ω Ω Ω
5000V - 10TΩ Ω Ω Ω Ω
Case 2
You select an insulation measurement with a test
voltage other than those proposed as standard.
Position :
Adjust. 50V...5000V
You can choose from the 3 "adjusted" voltages
predefined in SET-UP using the 5 and 6 keys, or
define another voltage by selecting it with the 4
key and adjusting it with the 5 and 6keys.
Case 3
You select an insulation measurement with a test
voltage that varies in steps : this is the "step function"
mode.
Position :
Adjust. Step
You can choose among the three step functions
(5 and 6keys) you defined earlier in SET-UP.
§ Pressing the START/STOP key immediately triggers the measurement.
An audible beep is emitted every 10 seconds to indicate that a measurement is in progress.
A number of special functions can be used during the measurement (cf. § 4.).
Important remark:
These insulation measurements cannot be started if there is an excessively high external voltage on the
terminals.
§
If, when the START key is pressed, the external voltage on the terminals of the instrument is
greater than the value U peak defined below, the insulation measurement is not triggered and an
audible alarm is emitted; the instrument then returns to automatic voltage measurement.
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