User Manual
8 GMC-I Messtechnik GmbH
3 General Operation
3.1 Measured Value Display
The following items appear at the display panel:
• The selected measuring function or standard
• Measurement values with abbreviations and units of measure 
• Setting parameters such as type of connection and measure-
ment type
• Symbols for softkey operation
• Wiring diagrams, notes regarding the test sequence and error 
messages
Green progress bars appear in the header for single measure-
ments, and orange progress bars appear for test sequences.
If the upper range limit is exceeded, the upper limit value is dis-
played and is preceded by the “>” symbol (greater than), which 
indicates measurement value overrun.
Note
The depiction of LEDs in these operating instructions 
may vary from the LEDs on the actual instrument due to 
product improvements.
Measured Value Storage
See section 8.2
3.2 Language, Keyboard Layout (culture parameter)
The desired user interface language, a country-specific keyboard 
layout and a language for the test sequences (measuring 
sequence parameter) can be selected with the rotary switch in the 
SETUP position (see section 4.4).
Note
If you would like to switch to a different language for the 
keyboard layout than the one already selected, you’re 
prompted to scan the appropriate barcode.
3.3 Help Functions (HELP key and QR code)
Depending on the rotary selector switch position, appropriate wiring 
diagrams are displayed.
➭ Press the HELP key in order to query online help.
➭ Press the ESC key in order to exit online help.
As an alternative, you can download or access the current oper-
ating instructions from our website with a tablet PC by scanning 
the QR code with the selector switch set to EXTRA.
3.4 Entering Alphanumeric Characters
In addition to the softkey keyboard which can be accessed at the 
display, standardized USB keyboards can also be used to enter 
texts such as offsets, ID numbers, type designations and com-
ments.
Reading in Barcodes
When the menu for alphanumeric entry via the softkey keyboard 
is opened at the display, any value read in by means of a barcode 
scanner is directly accepted.
See the appendix in section 14.2 concerning available accessory 
devices.
Note
We are unable to offer any guarantees regarding the use 
of scanning devices other than those listed in the appen-
dix.
3.5 Printouts – Protocolls
If you’ve connected a suitable printer (see list in appendix in sec-
tion 14.1) via the USB master port, you can print out a test report 
for each executed single measurement or test sequence by 
pressing the PRINT key. The respective single measurement or test 
sequence must be previously selected in the memory menu with 
the help of the scroll keys.
Note
We are unable to offer any guarantees regarding the use 
of printers other than those listed in the appendix.
Attention!
!
An error message appears if the PRINT key is pressed 
without first having connected a printer. 
Connect the printer and acknowledge by pressing the 
 key, or cancel printing by pressing the   key. 
3.5.1 Report Template
A report can be generated for the test sequences stored to the 
instrument. A report template is already included in the test instru-
ment to this end. Depending on which test sequence has been 
executed, the designation of the standard in the report may 
change.
The report template includes the following items:
•ID number
• Designation
• Customer name
• Location
•Date
•Time
• Comment with 64 characters
• Standard designation / sequence name / manual test
• Measured values
• Limit values
•Evaluations
• Test equipment (serial number)
Note
The display which appears is not a print preview and 
does not reflect the actual appearance of the printout.
3.5.2 Report Tapes from Thermal Printers
Report tapes can be printed out with the Z721S thermal printer 
(accessory: Z722S thermal paper).
3.5.3 Printing via ETC
Alternatively, stored measurement data can be read into ETC 
report generating software at a PC and printed out as a report.
3.6 Printouts – Barcodes (from Firmware V1.3.0)
Provided you have connected a suitable barcode printer via the 
USB Master interface (see list in Appendix, section 14.1), you can 
print a barcode for each DUT with the PRINT key:
➭ The printer information indicates whether the connected bar-
code printer is properly recognized by the test instrument: 
Setup (2/3) > Printer > Z721D > Printer information.
➭ Enter the requested paper size (of the current tray in Z721D) 
and the coding in the setup menu: 
Setup (2/3) > Printer > Z721D > Printer settings
➭ Switch to the database view (key MEM).
➭
Select the requested DUT with the cursor keys.
➭ Press the PRINT key.
➭
The identification code is printed in barcode and text form. If it is 
not possible to convert the identification code into a barcode, a 
warning message is generated.










