Test Products International 460 - Manual (Page 13)

NOTE: The Brightness control effects the backlighting whereas Contrast
effects the intensity of the liquid crystal display (both for the tracing beams
and the text display).
6. You have now completed the basic setup. Press Ch A (Channel A), to exit the user setup
mode and ready the instrument for Multimeter operations.
Measuring Voltage
1. With the 460 set for Input A (Ch A button), use the down arrow to set the highlight on
DCV. Press Enter.
2. Press the green V key, and connect the probes to a DC Voltage source. The voltage will
appear in alphanumeric text at the top left of the screen. The trace line A should be
steady, but if there are any AC components present on the line it will also show these
(especially in the case of partially rectified AC).
NOTE: Pressing the Green key V selection first will ensure you are not
being limited by the millivolt range. If the voltage reading is then read as
a small value, use the mV side of the green rocker key to display the millivolt
range on the screen.
3. Disconnect the DC Voltage source and press Ch A (Channel A blue button). Use the Up
arrow to move the screen highlight to ACV. Press Enter.
4. Press the green V key, and connect the probes to the AC source. The voltage can be read
at the top left of the screen expressed as an RMS value. The trace line A will show the
shape of the AC voltage source.
Measuring Frequency
1. With the 460 set for Input A (Ch A button), use the down arrow to set the highlight on
Freq. Press Enter.
2. Connect the probes to a frequency source. The frequency will be shown in alphanumeric
text at the top left of the screen. The trace line A will show the nature of the frequency
source.
Notes on Trace Stability:
a).
Ensuring that the Channel B trace is off when making frequency
measurements on the A channel, will reduce clutter on the screen, and make
the A trace easier to read.
460 User s Guide Getting Started
C2-3