PTE-100-C PRO
33
To read the voltage applied to the load while you are injecting current, do
the following:
1) Toggle to Func. mode using the button and press
as necessary to navigate to
Vtap.
2) Connect the load to an appropriate current tap and flag this tap
using the button, if not yet done. Check that the variac is
in its minimum (“0”) position now.
3) Press the button to activate the output and turn the variac
gently clockwise to regulate the current injection to the desired val-
ue on the Display #2. The applied voltage will be shown at Display
#1 simultaneously.
To measure the impedance of the connected load, follow the same steps as
above but use the
|Z|tap
this time. The connected impedance’s modulus
will be shown in Display #1. For greater accuracy, this measurement can
be done following the 4-wire method using the secondary mode of the
|
Z
|
tap
function:
1) Connect both sides of the connected load in parallel to the
BLACK/RED monitor inputs.
2) While you are placed at the
|Z| tap
function, press the
key and hold it down until a beep is heard and the function’s LED
starts blinking. You are now using the secondary measurement
mode. In this mode, the measurement is performed using the value
of the injected current and the voltage drop measured at the con-
nected load.
Impedance measurement requires a minimum amount of current (at least 10
per cent of the selected tap’s range) to be injected to the load. Non-linear
loads, i.e. those that exhibit impedance changes with time because of large
reactive components, cannot be accurately measured with this function.
Protecting your relay against test-related accidents
I lim and T lim functions automatically disconnect the output when the in-
jected current or the ON time exceed a pre-established limit respectively.
Function
ON
Tap
Function
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