MI 3110 EurotestIM
Measurements
– a.c. LV IT installations
33
IMD test procedure (MANUAL R, MANUAL I)
❑
Select the
IMD
function.
❑
Select MANUAL R or MANUAL I sub-function.
❑
Enable and set
limit
value.
❑
Connect
3-wire test lead to the instrument and tested item (see Figure 5.16).
❑
Press the
TEST
key for measurement.
❑
Press the
/
keys
to change insulation resistance
*)
until IMD alarms an
insulation failure for L1.
❑
Press the
TEST
key to change line terminal selection to L2.
In case, when IMD switch off voltage supply, instruments automatically change
line terminal selection to L2 and proceed with the test when instrument detects
supply voltage.
❑
Press the
/
keys to change insulation resistance
*)
until IMD alarms an
insulation failure for L2.
❑
Press the
TEST
key.
If IMD switch off voltage supply, instrument automatically proceed to the
PASS/FAIL indication.
❑
Use the
TAB
key to select PASS / FAIL indication.
❑
Press the
TEST
key to confirm selection and stop the measurement.
❑
Store
the result (optional).
IMD test procedure (AUTO R, AUTO I)
❑
Select the
IMD
function.
❑
Select AUTO R or AUTO I sub-function.
❑
Enable and set
limit
values.
❑
Connect
3-wire test lead to the instrument and tested item (see
❑
Press the
TEST
key for measurement.
❑
Insulation resistance between L1-PE is decreased automatically according to
limit value
*)
every time interval selected with timer. To speed up the test press the
/
keys
until IMD alarms an insulation failure for L1.
❑
Press the
TEST
key to change line terminal selection to L2.
In case, when IMD switch off voltage supply, instruments automatically change
line terminal selection to L2 and proceed with the test when instrument detects
supply voltage.
❑
Insulation resistance between L2-PE is decreased automatically according to
limit value
*)
every time interval selected with timer. To speed up the test press the
/
keys
until IMD alarms an insulation failure for L2.
❑
Press the TEST key.
If IMD switch off voltage supply, instrument automatically proceed to the
PASS/FAIL indication.
❑
Use the
TAB
key to select PASS / FAIL indication.
❑
Press the
TEST
key to confirm selection and stop the measurement.
❑
Store
the result (optional).
*)
When MANUAL R or AUTO R sub-function is selected, start value of insulation
resistance is determined by
it
start
R
R
lim
5
.
1
