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
52 GMC-I Messtechnik GmbH
Interface Operation
7 Interface Operation
The multimeters are equipped with an infrared interface for the
transmission of measurement data to a PC. Measured data are
optically transferred through the instrument housing by means of
infrared light to an interface adapter (accessory), which is
attached to the multimeter. The adapter’s USB interface allows for
the establishment of a connection to the PC via an interface cable.
Beyond this, commands and parameters can be transmitted from
the PC to the multimeter as well. The following functions can be
executed:
• Configuration and read-out of measuring parameters
• Measuring function and measuring range selection
• Start measurements
• Read out stored measured values
(METRAHIT E
XTRA only)
7.1 Activating the Interface
The interface is automatically activated for receiving operation
(multimeter receives data from the PC) as soon as the interface is
addressed by the PC, assuming that the “irStb ” parameter has
been set to “ir on ” (see chapter 7.2), or the instrument is already
switched on (the first command wakes up the multimeter, but
does not yet execute any further commands).
The “continuous transmission” operating mode is selected
manually as described below. In this operating mode, the
instrument continuously transmits measurement data to the PC
via the interface adapter. The measured value can then be dis-
played with the help of a terminal program.
Starting Continuous Transmission Operation with Menu Functions
1nFo
... SEnd StArt send
The symbol blinks at the display in order to indicate interface
operation.
Stopping Continuous Transmission Operation with Menu Functions
1nFo
... SEnd send
stop send
The symbol is cleared from the display.
Automatic Activation and Deactivation of Transmission Mode Operation
If the sampling rate is 10 seconds or longer, the display is
switched off automatically between samples in order to prolong
battery service life. The only exception is when the multimeter is
set to continuous operation.
As soon as an event occurs, the display is automatically switched
back on.
MEASURE
SETUP
FUNC
ENTER
FUNC
ENTER
MEASURE
SETUP
FUNC
ENTER
FUNC
ENTER
FUNC
ENTER