Operation Manual

09/ 2012 BENNING PV 1-1

17
8.1.2 Setting the automatic switch-off time (APO, Auto-Power Off)
- Switch the BENNING PV 1-1 off by simultaneously pressing the
R
PE
-key
2
and the
Auto
-key
3
.
- Press and hold the
Ω
NULL
-key
4
and simultaneously press the
R
PE
-key
2
and
Auto
-key
3
. Keep
the
Ω
NULL
-key
4
pressed.
- The LC display
1
shows "OFF" in the first line and the switch-off time (in minutes) in the
second line.
- Each time pressing the
V
ISO
-key
5
increases the switch-off time by one minute up to a maxi-
mum time of 10 minutes.
- Release the
Ω
NULL
-key
4
to store the setting.
8.1.3 Setting the date and the time
The BENNING PV 1-1 is equipped with an integrated real-time clock which automatically adds
a date / time stamp to each storage process or storage location (see chapter 8.7 "Measured
value memory").
To set the date and the time, carry out the following steps:
- Switch the BENNING PV 1-1 off by simultaneously pressing the
R
PE
-key
2
and the
Auto
-key
3
.
- Press and hold the -key
6
and simultaneously press the
R
PE
-key
2
and the
Auto
-key
3
.
- The date / time format is displayed as follows:
MM.DD = month (1-12).day (1-31)
YYYY = year
HH.mm = hours (0-23).minutes (0-59)
SS = seconds (0-59)
- Press the
R
PE
-key
2
to select a date / time field.
- As soon as the field is flashing, the value for that field can be set.
- Press the -key
8
or the -key
6
to increase or decrease the value.
Every change resets the field for the seconds to zero.
- Switch the device off by simultaneously pressing the
R
PE
-key
2
and the
Auto
-key
3
to store
the setting.
8.1.4 Testing the battery condition
During switch-on and operation, the BENNING PV 1-1 carries out an automatic battery test.
Discharged batteries are indicated by a battery symbol P on the LC display
1
. As soon as
the battery symbol is ashing, the batteries have to be replaced immediately (see chapter 9.4,
"Battery replacement").
8.1.5 Compensation of the measuring leads (null balance)
In order to carry out a compensation (null balance) of the measuring lead resistance, connect the
measuring leads with each other by means of the alligator clips and press the
Ω
NULL
-key
4
until the
Ω
NULL
symbol C is shown on the LC display
1
.
m
Measuring lead resistances can be compensated by up to 10 ohms.
See gure 4: Null balance of the measuring lead for R
PE
measurement
8.2 Testing the protective conductor resistance (R
PE
)
m
Neither the positive nor the negative pole of the PV generator must be earthed!
m
If a voltage of > 30 V is applied to the test object, the determined voltage will
be displayed. If the measuring voltage at the probe tips exceeds 30 V, the
R
PE
measurement will be blocked! If the R
PE
measurement is started below
30 V, a low-impedance voltage source might trip the built-in fuse of the
BENNING PV 1-1!
For single measurement:
- Make sure that the switching circuit and/or the test object are free of voltage.
- Connect the red and black safety measuring leads to the corresponding 4 mm test sockets
L and K and connect the test object.
- Press the
R
PE
-key
2
.
- The measured protective conductor resistance (R
PE
) is displayed
1
.
See gure 5: Testing the protective conductor resistance (R
PE
)
For continuous measurement:
- Make sure that the switching circuit and/or the test object are free of voltage.
- Connect the red and black safety measuring leads to the corresponding 4 mm test sockets
L and K and connect the test object.
- Press and hold the
R
PE
-key
2
until the symbol G is displayed.
- The measured protective conductor resistance (R
PE
) is displayed
1
continuously.
- Press the
R
PE
-key
2
to terminate the continuous measurement.
See gure 5: Testing the protective conductor resistance (R
PE
)