Amprobe DMIII-Multitest Power-Quality-Recorder - Manual (Page 40)

AMPROBE
DMIII MULTITEST
EN-38
7.1.3. How to set the Clamp Type
The value of this parameter must be always equal to the type of clamp being used.
Three types of clamps are available:
 STD:
STANDARD clamps or current transformers
 FlexEXT: FLEXIBLE clamps with EXTERNAL power supply.
 FlexINT:
FLEXIBLE clamps AM-Flex33 (coils directly connected to the
instrument inputs). These clamps allow 1000A and 3000A range.
Set the desired value by pressing the multifunction keys F3 and F4.

7.1.4. How to set the current range
Position the cursor on the corresponding word by pressing the multifunction keys F1 and
F2 and set the desired value by pressing the multifunction keys F3 and F4.
For STD and FlexEXT the value of this parameter must be always equal to the full scale
of the current clamp used to take the measurement. In case multi-scale clamp is used,
the value of this parameter must be equal to the scale selected on the clamp.
For FlexINT (AM-Flex33) only two ranges are available: 1000A and 3000A.
7.1.5. How to set the value of the transformer voltage ratio (TV RATIO)
The instrument can also be interfaced with step-down transformers in the equipment under
test: it can display the value of he voltages present on the primary winding of these
transformers. To do this it will be necessary to set the value of the transformers’ windings
ratio from 2:1 to 3000:1. The default is set at 1:1 for measurements of none transformer
systems.
Select “TV RATIO” in the ANALYZER CONFIG menu. Set the desired value by pressing
the multifunction keys F3 and F4.
7.1.6. How to enable/disable the password
The instrument is provided with a protective routine to avoid the risk of being disturbed or
interrupted during a recording or an energy measurement. Once a recording or a direct
energy measurement has been started (with the option “PASSWORD” enabled), after
about 3 minutes from the last key pressure or switch rotation it won’t be possible to press
START/STOP to stop the recording, “PASSWORD” will be displayed and it will be
necessary to insert the password.
In order to insert the password (which is not changeable), press the multifunction keys in
the following sequence (within 10 seconds):
F1, F4, F3, F2
If you wait more than about 10 seconds the display will return to the meter mode and the
instrument will continue recording. If you insert a wrong password
the message “Password
error” will be displayed under “PASSWORD”. After a few seconds the display will return to
meter mode and the instrument will continue recording. In order to enable/disable this
option the correct password will have to be entered. The display will return to meter mode
and START/STOP will have to be pressed again to stop the recording. You will then need
to re-
enter the “ANALYZER CONFIG” menu and scroll up or down to the item
“PASSWORD: ON” using the multifunction keys F1 and F2. Then turn the password off by
pressing the multifunction keys F3 and F4.