Gossen MetraWatt METRA HIT 22S - Current Measurement; Current Measurement Setup and Fuse Protection

GMC-I Gossen-Metrawatt GmbH 17
GB
9 Current Measurement with METRA HIT 23/24/25/26
METRA HIT 25S/26S/M/MIL A (AC+DC)
TRMS
METRA HIT 23S/24S A AC mean value rectification
Attention!
!
METRA HIT 23S: The instrument is intended for per-
forming measurements in the transducer sector of
energy measuring technology. The 3 A and 16 A
measuring ranges covered by METRA HIT 23S are
not fuse-protected!
➭ First switch off the power supply to the measuring circuit
or the load component and discharge any capacitors
which might be present.
➭ Select range A with the rotary switch for currents
> 300 mA, or range mA for currents < 300 mA.
Switch to the measuring range A first, for the measurement
of currents of an unknown quantity.
➭ Select the respective current type which corresponds to
the measured quantity by briefly pressing the ESC|FUNC
multifunction key. Each activation of the key causes alter-
nate switching between DC
1)
and AC or (DC +
AC)
TRMS
2)
, as well as acknowledgement by means of an
acoustic signal. The symbols DC, AC or (DC+AC)
TRMS
indicate the selected voltage type at the LC display.
After the range has been selected with the rotary switch,
the DC current mode is always active.
➭ Securely connect the instrument to the load component
in series as shown (without matching resistor).
1) METRA HIT 23S/24S
2) METRA HIT 25/26
AmA
10A300mA
AmA
10A300mA
– (+) / ~
+ (–) / ~
. . . 300 mA
. . . 10 A
– (+) / ~
+ (–) / ~