User Manual

74 GMC-I Messtechnik GmbH
The instrument determines whether or not the probe has been
properly set and displays results at the display panel.
(18) USB Port
The USB port allows for the exchange of data between the test
instrument and a PC.
(19) RS 232 Port
This connection allows for data entry by means of a barcode
scanner or an RFID reader.
(20) Charging Socket
This socket may only be used to connect the Z502R charger for
recharging batteries in the instrument.
(21) Battery Compartment Lid – Replacement Fuses
Attention!
!
When the lid is removed, the instrument must be discon-
nected from the measuring circuit at all poles!
The battery compartment lid covers the Compact Master Battery
Pack (Z502H) or a battery holder with the batteries and the
replacement fuses.
The battery holder or the Z502H battery pack is designed for use
with eight 1.5 V AA batteries in accordance with IEC LR 6 for
power supply to the instrument. When inserting batteries, make
sure that they are poled in accordance with the symbols.
Attention!
!
Make sure that all of the batteries are inserted with cor-
rect polarity. If just one battery is inserted with reversed
polarity, it will not be recognized by the instrument and
may result in leakage from the batteries.
Two replacement fuses are located beneath the battery compart-
ment lid.
Control Panel – LEDs
MAINS/NETZ LED
This LED is only functional when the instrument is switched on. It
has no function in voltage ranges U
L-N
and U
L-PE
.
It lights up green, red or orange, or blinks green or red depending
upon how the instrument has been connected and the selected
function (see also section 18, “LED Indications, Mains Connec-
tions and Potential Differences”, beginning on page 75).
This LED also lights up if line voltage is present during measure-
ment of R
INS
and R
LO
.
U
L
/R
L
LED
This LED lights up red if contact voltage is greater than 25 V or
50 V during RCD testing, as well as after safety shut-down
occurs. It also lights up if R
INS
or R
LO
limit values have been
exceeded or fallen short of.
RCD • FI LED
This LED lights up red if the RCCB is not tripped within 400 ms
(1000 ms for type RCD S selective RCDs) during the tripping test
with nominal residual current. It also lights up if the RCCB is not
tripped before nominal residual current has been reached during
measurement with rising residual current.