10
9
GFCI Menu (continued)
• Menu Heading - “GFC=”
• Measurement at Menu Heading - None
• Submenu - No
Pressing the display advance button for three seconds will activate the GFCI
test. The ST-1THD applies 6mA to ground through a fixed resistor to trip
the GFCI. A functional GFCI will disconnect the power. The reset may be at
the outlet or at the panel. The tester will display the calculated time to trip,
apply the current and count up to the calculated time.
• If the GFCI is functioning properly, the circuit will disconnect, and the
LED display on the ST-1THD will go out. When the circuit is reset, and
power is returned, the LED display will show the actual time to trip.
• If the GFCI fails to trip, the LED display will show "bAd", which indicates
that the GFCI may be installed incorrectly, or the GFCI may be defective.
WARNING
In order to test GFCI’s in a 2-wire system (no ground wire), the #61-175
ground continuity adapter must be used. Connect the ground lead on
the adapter to a ground, such as a metal water or gas pipe.
Recall Memory Menu (Event Recording)
Stored data can be viewed from the Recall Memory menu. Pressing the dis-
play advance button for three seconds enters the submenu. The submenu is
identified by a blinking “rCL” on the LED display. Once in the submenu,
pressing the display advance button gives access to the stored values 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 standard testing mode.
Navigating through the outlet circuit testing menu while in recall memory
mode is identical to navigation through the menu in standard 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 main-
tain 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
Harmonic Wave Form Testing
To access the harmonic wave form programming menu, press the display
advance button and insert the ST-1THD into the receptacle. "HAr" will be
shown on the LED display . The LED display cycles between the menu
heading, and the measurement every four seconds. Press and hold the dis-
play advance button for one second to move to the menu. To enter the sub-
menu, press the display advance button for three seconds. To navigate from
measurement to measurement within 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. Press the display advance button and insert the ST-1THD into the recep-
tacle
2. The LED display shows “HAr” indicating self-calibration of the unit
3. The LED display cycles between “Lt_”, indicating that % Line Voltage
Total Harmonic Distortion (THD) is being measured, and the THD mea-
surement every four seconds.
4. Press and hold the display advance button for three seconds to access
the Line Voltage submenu.
5. The LED display alternates between “Hi”, indicating that the highest dis-
tortion 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 % Line Voltage THD submenu.
7. Press and hold the display advance button for three seconds to return to
the main menu.
