User Manual

66 GMC-I Messtechnik GmbH
Interface Operation
8 Interface Operation
The METRACAL MC is equipped with an infrared interface for com-
munication with the PC. Commands are optically transferred
through the instrument housing by means of infrared light to an in-
terface adapter (accessory: USB X-TRA), which is plugged onto the
METRACAL MC. The adapter’s USB interface allows connection to
the PC via an interface cable.
Commands and parameters can be transmitted from the PC to the
METRACAL MC. The following functions can be executed:
DMM
• Configuration and read-out of measuring parameters
• Measuring function and measuring range selection
• Start measurement
• Read out stored measured values
Calibrator
• Configuration and read-out of calibration parameters
• Calibration function and measuring range selection
• Start calibration
• Programming of user-specific procedures (interval and ramp
functions)
8.1 Activating the Interface
The interface is automatically activated for receiving operation
(METRACAL MC receives data from the PC) as soon as the interface
is addressed by the PC, assuming that the “irStb” parameter
has been set to “on” (see section 8.2), or the instrument is already
switched on (the first command wakes up the METRACAL MC, 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, which can then be displayed with the
help of a terminal program.
Starting Continuous Transmission Operation with Menu Functions
1nFo
 ...  SEnd StArt send
The symbol blinks at the display indicating 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 dis-
play is automatically switched back on.
MEAS/CAL
SETUP
OUT
ENTER
OUT
ENTER
MEAS/CAL
SETUP
OUT
ENTER
OUT
ENTER
OUT
ENTER