2
GMC-I Messtechnik GmbH
Contrary to the details given in the operating instructions
the following modifications apply to the M246M type:
Select test voltage – Parameter U_ISo
The desired test voltage can be adjusted from 10 V ... 500 V in
the
SEt
menu.
After repeatedly pressing the
MEASURE | SETUP
key (without first
turning the multimeter off), you can return to the last selected
parameter U_ISo from the measuring mode.
Quick selection of test voltage
Alternatively, the requested test voltage can be selected via the
cursor keys
. Prerequisite: the multimeter is in switch position
V
1M
Ω
and in the AUTO range function.
Function DATA during insulation measurement
This DATA function differs from the standard DATA-Compare
function.
In the interference voltage measurement function V(ac+dc)1M
Ω,
the special DATA function for insulation measurement is activated
by pressing the
DATA
key –
DATA
blinks in the display. During inter-
ference voltage measurement, no DATA values are determined or
stored yet. By briefly pressing the
FUNC | ENTER
key, the insulation
measurement is activated and the test voltage is applied.
An inter-
mittent acoustic signal indicates to the user that the test voltage is
applied (accompanied by a blinking of the ISO symbol in the dis-
play). After applying the test probes, a check is being made as to
whether a valid measured value is present.
As soon as a stable
measured value appears in the display, the DATA value is stored
(frozen in the display). A long acoustic signal indicates that the
measurement is completed, the test voltage is switched off again,
DATA
no longer blinks and the user can read and note down the
measured value. By
repeatedly
pressing the
FUNC | ENTER
key, the
test voltage is applied again and DATA is activated (
DATA
blinks in
the display).
If no DATA value is determined or if OL is shown in the display, the
test voltage is automatically switched off after approx. 10 sec-
onds. In order to deactivate the DATA function, the
FUNC | ENTER
key must be pressed and held.
Special case indication of low insulation resistances up to short circuit
First „Error“ is displayed, and then briefly „Short“, followed by the
current resistance measured value.
Select display mode for the analog display – Parameter A.diSP
One of two different display modes can be selected for the
analog display:
•
bArG
: bar graph
•
Point
: pointer
1nFo
...
SET
rAtE
...
A
.
diSP
bArG
/
Point
(
bArG
= default value)
Technical Data Insulation Resistance Measurement
1)
1)
During insulation resistance measurement (
M
Ω
@U ISO
): If ERROR is displayed as „Error“
>> limits: U
interference
> 10 ... 20 V and U
interference
≠
U
ISO
,
Ri < 10 k
Ω
@ Uiso 10 V,
Ri < 50 k
Ω
@ Uiso 50 V, Ri < 100 k
Ω
@ Uiso 100 V, Ri < 250 k
Ω
@ Uiso 250 V,
Ri < 500 k
Ω
@ Uiso 500 V
2)
Interference voltage measurement TRMS (V AC + DC) with 1 M
Ω
input resistance,
bandwidth 15 Hz ... 500 Hz, measuring error 3% + 30 digits and in the 3 V and
30 V range, all values < 0.29 V are suppressed
Scope of delivery
1
Insulation multimeter
1
Protective rubber cover
1
Cable set KS17-2
1
DAkkS calibration certificate
2
Batteries, 1.5 V, type AA, installed
1
Power pack NA X-TRA
1
Condensed operating instructions*
* Detailed operating instructions for download
on the Internet at www.gossenmetrawatt.com
GB
MAN / AUTO
DATA/MIN/MAX
... 500 V
10 V ...
M
Ω
@UISO
V
1M
Ω
Autorange
Measuring Range
Resolution
Nominal Voltage
U
ISO
Intrinsic Error
under Reference
Conditions
±
( % rdg + d)
0.3 V ... 1000 V
2)
Ri = 1 M
Ω
3 + 30 > 100 digits
5 ... 310.0 k
Ω
0.1 k
Ω
10
//50/100/250/500 V
5 + 30
// 3 + 5
0.280 ... 3.100 M
Ω
1 k
Ω
10
//50/100/250/500 V
5 + 30
// 3 + 5
02.80 ... 31.00 M
Ω
10 k
Ω
10
//50/100/250/500 V
5 + 30
// 5 + 5
028.0 ... 310.0 M
Ω
100 k
Ω
10
//50/100/250/500 V
5 + 30
// 5 + 5
0280 ... 3100 M
Ω
1 M
Ω
500 V
5 + 5
Measuring
Function
Nom.
Voltage
U
N
Open-
Circuit
Voltage
U
o
Nom.
Cur-
rent I
N
Short-
Circuit
Cur-
rent I
k
Acoustic
Signal
for
Overload Capacity
Value
Time
U
interference
/
M
Ω
@U ISO
—
—
—
—
U>1000V
1000 V
Cont.
M
Ω
@U ISO
10
, 50,
100,
250,
500 V
Max.
1.1x U
Iso
1.0 mA
< 1.5
mA
U>1000V
1000 V
10 s
MEASURE
SETUP
FUNC
ENTER
FUNC
ENTER
FUNC
ENTER
