Test Products International 460 - Manual (Page 14)

b). Using the HOLD/RUN button will freeze the trace and allow waveform
characteristics to be measured precisely against the background grid.
Measuring Resistance
1. With the 460 set for Input A (Ch A button), use the down arrow to set the highlight on
OHM. Press Enter.
2. Connect the probes across the resistance source. The resistance value is shown in two
forms. First as alphanumeric text at the top of the screen. Secondly, the value is shown
visually against a calibrated bar. The value of the bar is shown at the base of the screen.
For instance, if a resistance of 12.00 K Ohms is being read, a bar of value 40K Ohms will
typically be displayed, and the actual value of the resistance will show as 12.00 against
that bar
Testing Continuity
1. With the 460 set for Input A (Ch A button), use the down arrow to set the highlight on
Beep. Press Enter.
2. Connect the probes across the source to be tested. If the line is closed (equiv. of short
circuit) or not offering more than 100 Ohms of resistance, the full beep will be heard, and
the bar will show the degree of resistance (if any).
Note: The continuity test function can also be used to test the resistance in
a path up to a value of 4K Ohms. The actual value will be shown alpha-
numerically in the top left of the screen, and also shown graphically against
a bar having a span of 0 to 4K Ohms
Diode Test
1. With the 460 set for Input A (Ch A button), use the down arrow to set the highlight on
DIODE. Press Enter.
2. Connect the probes across the diode in the +/+ direction. A total resistance should be
noted (The full bar shows no reverse current flow).
3 Connect the probes to the diode in the normal +/- direction. The bar display should show
an open or almost open condition. - Forward bias is shown against a scale of 2.0 volts
and is also displayed alpha-numerically at top left of the screen.
460 User s Guide Getting Started
C2-4