Instructions
Table Of Contents
- 1 Safety Features and Precautions
- 2 Operating Overview – Connections, Keys, Rotary Switch, Symbols
- 3 Initial Start-Up
- 4 Control Functions
- 5 Measurements
- 5.1 Voltage Measurement
- 5.1.1 Direct and Pulsating Voltage Measurement, V DC and V (DC+AC)
- 5.1.2 Alternating Voltage Measurement with 1 MW Load Resistance and Frequency Measurement with Selectable Low-Pass Filter (METRA HIT Extra, METRA HIT Etech and METRA HIT Especial only)
- 5.1.3 Alternating Voltage and Frequency Measurement V AC and Hz with Selectable Low-Pass Filter (METRA HIT Extra, METRA HIT Etech and METRA HIT Especial only)
- 5.1.4 Frequency and Duty Cycle Measurements (METRA HIT Extra only)
- 5.2 Resistance Measurement, W
- 5.3 Continuity Test
- 5.4 Diode Testing with a Constant Current of 1 mA
- 5.5 Temperature Measurement
- 5.6 Capacitance Measurement (METRA HIT Extra and METRA HIT Etech only)
- 5.7 Current Measurement
- 5.7.1 Direct and Pulsating Current Measurement, Direct Connection, A DC and A (DC+AC) (METRA HIT Extra, METRA HIT Etech and METRA HIT Especial only)
- 5.7.2 Alternating Current and Frequency Measurement, Direct Connection, A AC and Hz (METRA HIT Extra, METRA HIT Etech and METRA HIT Especial only)
- 5.7.3 Direct and Pulsating Current Measurement with Current Clamp Sensors, A DC and A (DC+AC)
- 5.7.4 Alternating Current Measurement with Current Clamp Sensors, A AC and Hz
- 5.7.5 Direct, Pulsating and Current Measurement with Current Clamps Transformer A DC, A (DC+AC), A AC and Hz (METRA HIT Extra, METRA HIT Etech and METRA HIT Especial only)
- 5.1 Voltage Measurement
- 6 Device and Measuring Parameters
- 7 Interface Operation
- 8 Technical Data
- 9 Maintenance and Calibration
- 10 Accessories
- 11 Index
GMC-I Messtechnik GmbH 41
V/Hz, , Temperature, and A/Hz Measurements
5.7.1 Direct and Pulsating Current Measurement, Direct Connection,
A DC and A (DC+AC)
(METRAHIT E
XTRA, METRAHIT ETECH and
METRAHIT E
SPECIAL only)
➭ First disconnect supply power from the measuring circuit or
the power consumer (1), and discharge any capacitors.
➭ In accordance with the current to be measured, turn the rotary
switch to A or A .
➭ Select the current type appropriate for the measured quantity
by briefly pressing the FUNC | ENTER multifunction key. Each
time the key is pressed, the instrument is switched back and
forth between A DC and A (DC + AC)
TRMS
, which is indicated
by means of an acoustic signal. The current type is indicated at
the LCD by means of the DC or the (DC+AC)
TRMS
symbol.
➭ Safely connect the measuring instrument (without contact
resistance) in series to the power consumer (2) as shown.
➭ Switch supply power to the measuring circuit back on (3).
➭ Read the display. Make a note of the measured value if the
instrument is not being operated in the memory mode or the
transmission mode.
➭ Disconnect supply power from the measuring circuit or the
power consumer (1) once again, and discharge any
capacitors.
➭ Remove the test probes from the measuring point and return
the measuring circuit to its normal condition.
COM mA A
~
R
x
~
R
x
1
3
2
I > 10 A
!
A
A
003.50
A
DC
003.50
A
DC
AC
TRMS
A
A
METRAHIT EXTRA
METRAHIT ESPECIAL
6 A / 10 A (16 A max. 30 s)
600 A / 6 mA
60 mA / 600 mA
6 A / 10 A (16 A max. 30 s)
8
.
8
.
8
.
8
.
8
!
I > 16 A
Strom
Measuring Ranges:
Current measurement
may only be performed
with installed batteries!
FUNC
ENTER
METRAHIT ETECH
60 mA / 600 mA
6 A / 10 A (16 A max. 30 s)