GMC-I Messtechnik GmbH
5
Control Panel Keys – Adjusting Screw
a
START:
Starts insulation resistance measurement depending
on rotary selector switch setting (see measuring ranges
➀
and
➁
), or low-resistance measurement with automatic polarity
reversal (see low-resistance measuring range
➂
).
Reactivates the instrument from the standby mode.
b
CONTIN./
ZERO
*
Starts long-term measurement for insulation and low resis-
tance (low resistance: polarity in one direction only).
Each measurement takes up to 3 minutes; the instrument is
then switched to standby. Reactivates the instrument from the
standby mode.
c
Bat. TEST:
Starts the battery test (see battery level display
➄
d
10k-1T/100k-100M
Switches between measuring ranges for insulation resistance
measurement (see measuring ranges
➀
and
➁
, as well as sec-
tion 5.2). Reactivates the instrument from the standby mode.
Mechanical Zero Point – Adjusting Screw (e)
If necessary, use the adjusting screw (e) to set the pointer to the
mechanical zero point (measuring range lower limit for all measur-
ing ranges, except battery level indicator) with the switch in the
OFF
position.
Electrical Zero Point – ZERO Function (Roffset)
ZERO function (Roffset):
for subtracting cable resistance from the
measurement results with the help of the
CONTIN.
and
10k-1T/
100k-100M
*
the supplementary labelling „ZERO“ depends on the product series
Analog Display Symbols
1
Insulation resistance measuring range:
10 k
... 1 T
LED
➀
lights up orange: this measuring range is active
LED
➀
blinks orange: open cable ends (special case with
50 V test voltage: full-scale pointer deflection of 1 G
)
2
Insulation resistance measuring range:
100 k
... 100 M
LED
➁
lights up orange: this measuring range is active
3
Low-resistance measuring range
: 0 ... 5
LED
➃
blinks orange if the range is exceeded
4
Voltage measuring range:
0 ... 1000 V
LED
➃
lights up orange: low-resistance measurement is active
LED
➃
lights up orange: voltage measurement is active
5
Battery level indicator
:
Left-hand range limit:
batteries low or weakly charged
Right-hand range limit:
batteries full or fully charged
6
Fuse link and electronic fuse
:
FUSE
ZERO/FUSE
➅
blinks red: blown fuse
Voltage measurement is still possible.
–
Funktion ZERO (Roffset):
LED
ZERO/FUSE
➅
lights up red permanently after
offset blancing, see section 7.3.
a
b
c
d
e
1
2
4
5
6
3
➀
➁
➃
➅
www.calcert.com
1.888.610.7664
0
5
10
15
20
25
30
