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Line Frequency
Within this menu selection, the ST-1THD displays the line frequency of the
current. There is no submenu for this menu selection.
Recall Memory Menu (Event Recording)
Stored data can be viewed from the Recall Memory menu. Pressing the
display advance button for three seconds enters the submenu. The sub-
menu is identified by a blinking “rCL” on the LED display. Once in the sub-
menu, pressing the display advance button gives access to the stored val-
ues from memory. These values are accessed through the outlet circuit
testing menu. While stored values are being displayed, the LED will blink
to differentiate these values from the "live" values being captured in stan-
dard testing mode. Navigating through the outlet circuit testing menu while
in recall memory mode is identical to navigation through the menu in stan-
dard operation.
While the ST-1THD is in operation, the unit will analyze and store data on
the various measurements. These values can be permanently stored into
the memory from the Recall Memory submenu. Pressing the display
advance button for three seconds when a blinking “rCL” is shown on the
display will store all of the data into memory, overwriting any previous data
in memory.
It is important to note that pressing the blinking “rCL” to exit viewing
recorded data stores new data into permanent memory. If you wish to
maintain the stored data, but want to return to standard operation mode,
unplug the SureTest and re-insert it into the receptacle. The SureTest will
return to operation mode.
• Menu Heading - “rCL”
• Measurement at Menu Heading - None
• Submenu - yes
Blinking “rCL” - Allows access to stored values from memory
“Sto” - Stores values into memory
Testing with the #61-181 Clamp Adapter
These tests can only be accessed by using the #61-181 amp clamp adapter
with the model ST-1THDC. Power must be supplied to the unit by an exten-
sion cord or battery pack to test the unit with the clamp adapter.
When the adapter is plugged into the ST-1THDC, the LED display will show
“Ct” indicating that the adapter is correctly plugged into the unit. The ST-
1THDC will then automatically enter into the current probe programming
menu. The LED display cycles between the menu heading, and the measure-
ment every four seconds. Press the display advance button for one second
to move to the menu. To enter the submenu, press the display advance but-
ton for three seconds. To navigate from measurement to measurement with-
in the submenu, press the display advance button. While in the submenu,
pressing and holding the display advance button for three seconds brings
the unit back to the menu structure.
1. Insert the #61-181 adapter into the ST-1THDC
2. The LED display shows “Ct” indicating recognition of the adapter
3. The LED display cycles between “cA”, indicating that True RMS current
is being measured through the amp clamp adapter, and the current mea-
surement every four seconds.
4. Press and hold the display advance button for three seconds to access
the Current submenu.
5. The LED display alternates between “Hi”, indicating that the highest cur-
rent is being measured, and the measurement every four seconds
6. Press the display advance button for one second to move to the next test
within the Current submenu.
7. Press and hold the display advance button for three seconds to return to
the main menu.
