Vanguard Herculito User Manual

Page 11

Herculito Operating Procedures

6.0 OPERATING THE HERCULITO

The Herculito is operated with one control knob. The operator turns the control knob to scroll
through different menu selections on the display. When the desired option appears, it is selected
by pressing the control knob like a pushbutton.

6.1 Step-by-Step Procedures

6.1.1 Precautions

CAUTION

Do not measure the resistance of inductive devices. This can generate unsafe high-
voltage spikes (created by a collapsing magnetic field) if the test current is interrupted by
detaching a test lead during a test. Do not touch or disconnect any test lead that is
connected to a device under test while current is being conducted. Failure to heed this
warning can result injury to the user and/or damage to the Herculito. The Herculito
measures low, non-inductive resistances (e.g., breaker contacts and bus-bar junctions); If
the resistance of an inductive device is required to be measured, then the use of an
instrument designed for that purpose is recommended (such as the WRM made by the
Vanguard Instruments Company).

6.1.2 Preparations

a. Ground Herculito to Substation ground.

b. Plug the Herculito power cable into a power outlet.

c. Connect current-cable lugs and voltage-sensing cable plugs to control-panel (Figure 2).

d. Attach current test-cable clamps to opposite terminals of the resistive load being tested
(Figure 3 & 4).
e. Turn on Herculito power, by pressing the rocker switch to ON.

NOTE

All Herculito operations begin at the MAIN MENU, which appears after the initial boot-up (after
configuration and software revision data display briefly.) The Main Menu display is shown
below:

Figure 5 Main Menu

f. The main menu displays a list of four options, which appear in sequence as the control knob is
turned. The four options of the Main-Menu list are: RUN TEST, ADJ CONTRAST, CAL.
CHECK.

g. When the option of choice appears in the Main Menu, press (or “Push”) the control knob to
enter the selection and start that sequence. The step-by-step operating procedures that follow
describe each of the selected options in the order listed above.

MAIN MENU