Manual

Gossen Metrawatt GmbH 9
(1) Control Panel – Display Panel
See section 6.1, “Control Panel”, on page 16.
See section 6.2, “Display”, on page 16.
(2) Eyelets for the Neck Strap
The included neck strap can be attached at the right and left hand
sides of the instrument. You can hang the instrument from your
neck and keep both hands free for measurement.
(3) Rotary Selector Switch
The following basic functions can be selected with the rotary
switch:
SETUP / I
N
/ I
F
/ Z
L-PE
/ Z
L-N
/ R
E
/ R
LO
/ R
INS
/ U / SENSOR /
EXTRA / AUTO
The various basic functions are selected by turning the function
selector switch while the instrument is switched on.
(4) Measuring Adapter
Attention!
!
The measuring adapter (2-pole) may only be used to-
gether with the test instrument’s test plug.
Use for other purposes is prohibited!
The plug-on measuring adapter (2-pole) with the two test probes
is used for measurements in systems without earthing contact
outlets, e.g. at permanent installations, distribution cabinets and
all three-phase outlets, as well as for insulation resistance and
low-value resistance measurements.
The 2-pole measuring adapter can be expanded to three poles for
phase sequence testing with the included measurement cable
(test probe).
(5) Plug Insert (country-specific)
Attention!
!
The plug insert may only be used together with the test
instrument’s test plug.
Use for other purposes is prohibited!
After the plug insert has been attached, the instrument can be
directly connected to earthing contact outlets. There’s no need to
concern yourself with poling at the plug. The instrument detects
the positions of phase conductor L and neutral conductor N and
automatically reverses polarity if necessary.
The instrument automatically determines whether or not both pro-
tective contacts in the earthing contact outlet are connected to
one another, as well as to the system protective conductor, for all
types of protective conductor measurements when the plug insert
is attached to the test plug.
(6) Test Plug
The various country specific plug inserts (e.g. protective contact
plug insert for Germany or SEV plug insert for Switzerland) or the
measuring adapter (2-pole) are attached to the test plug and
secured with a threaded connector.
The controls on the test plug are subject to interference suppres-
sion filtering. This may lead to slightly delayed responses as
opposed to controls located directly on the instrument.
(7) Alligator Clip (plug-on)
(8) Test Probes
The test probes comprise the second (permanently attached) and
third (plug-on) poles of the measuring adapter. A coil cable con-
nects them to the plug-on portion of the measuring adapter.
(9) ON/Start
▼ Key
The measuring sequence for the func-
tion selected in the menu is started by
pressing this key, either on the test
plug or at the control panel. Exception: If the instrument is
switched off, it can only be switched on by pressing the key at the
control panel.
This key has the same function as the
▼ key on the test plug.
(10) I
N
/ I Key (at the control panel)
The following sequences are triggered
by pressing this key, either on the test
plug or at the control panel:
• Starts the tripping test after measurement of touch voltage for
RCCB testing (I
N
).
• Measurement of ROFFSET is started in the R
LO
/ Z
L-N
function.
• Semiautomatic polarity reversal (see section 10.9)
(11) Contact Surfaces
The contact surfaces are located at both sides of the test plug.
When the contact plug is grasped in the hand, contact is auto-
matically made with these surfaces. The contact surfaces are
electrically isolated from the terminals and from the measuring cir-
cuit.
In the event a potential difference of greater than 25 V between
protective conductor terminal PE and the contact surface, PE is
displayed. See “LED Indications, Mains Connections and Poten-
tial Differences” on page 17.
(12) Test Plug Holder
The test plug with attached plug insert can be reliably secured to
the instrument with the rubberized holder.
(13) Fuses
The two fuses protect the device in case of overload. Phase con-
ductor L and neutral conductor N are fused individually. If a fuse is
defective, and if an attempt is made to perform a measurement
which uses the circuit protected by this fuse, a corresponding
message appears at the display panel.
See section 21.2, “Fuse Replacement”, on page 97.
(14) Holders for Test Probes (8)
(15/16) Current Clamp Connector
Only the current clamp transformers offered as accessories may
be connected to these sockets.
(17) Probe Connector Socket
The probe connector socket is required for the measurement of
probe voltage U
S-PE
, earth electrode voltage U
E
, earthing resis-
tance R
E
and standing surface insulation resistance.
It can be used for the measurement of touch voltage during RCD
testing. The probe is connected with a 4 mm contact-protected
plug.
The instrument determines whether or not the probe has been
properly set and displays results at the display panel.
(19) USB Port
The USB port allows for the exchange of data between the test
instrument and a PC.
(20) RS 232 Port
This port allows for data entry by means of a barcode scanner or
an RFID reader.
(21) Charging Socket
Only the Z502R charger for charging batteries inside the test
instrument may be connected to this socket.
(22) Battery Compartment Lid – Replacement Fuses
Attention!
!
Before removing the lid is removed, the instrument must
be disconnected from the measuring circuit at all poles!
The compartment under the lid accommodates the rechargeable
battery pack (Z502H), or commercially available rechargeable bat-
teries or regular batteries.
Two replacement fuses are also located under the battery com-
partment lid.