Amprobe MEGATEST-1000 Megohmmeter - Manual (Page 19)

5.2.2.3 "TIMER" MODE
GO
Press the GO key. The instrument effects the measurement ending
when the set time has elapsed.
999 seconds
→ Maximum value of the test duration.
10 seconds → Minimum value of the test duration.
Note: Pressing the GO key again the test gets immediately
interrupted.
R
ISO
2.07
M Ω
500 V 20
s
TIMER
At the end of the test, in case the
resistance value M
Ω detected
results to be lower than R
MAX
(depending on the selected voltage
see following Table 1) and the test is
effected at the selected rated
voltage value, the instrument emits a
double sound signal indicating the
positive outcome of the test
displays one screen similar to the
screen alongside.
Insulation
resistance
value R
ISO.
Duration of the set
test.
Rated voltage value selected for the Timer test.
Timer mode.
The values of measured resistance of isolation always must be confronted with the
normative limits for being able to assert if the system is to norm.
SAVE
The test can be stored pressing the SAVE key twice (according to
paragraph 0).
Note The maximum resistance value R
MAX
which can be measured in mode M Ω
depends on the rated voltage selected for the test. In particular:
Rated voltage selected
for the test
R
MAX
= Maximum resistance
value
50VDC 99.9M Ω
100VDC 199.9M Ω
250VDC 499M Ω
500VDC 999M Ω
1000VDC 1999M Ω
Table1: Table of maximum resistance values which can be measured under M Ω
mode depending on the rated voltage selected.
18