Test Products International 293 - Manual (Page 25)

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h. Data Hold
Press the HOLD button at any time on any function
to freeze the reading on the LCD display. This
function is very useful when measuring in locations
where the display is difficult to read.
i. Trim
(Average sensing mode for ACV, ACA, OHM, Diode
and Continuity.)
Press the TRIM button when measuring unstable
signals to stabilize the reading. The 293 will aver-
age the measured value approximately every 1.25
seconds to obtain a clearer picture of the current
or voltage being measured.
j. Peak Mode
1. Set the 293 to the ACA function.
2. Push the RNG button and select the desired
measurement range.
3. Push the TRIM button until PEAK shows on LCD.
4. Allow the LCD to stabilize to zero.
5. Clamp the jaws around a single conductor to the
device to be measured.
6. Apply power to the device under test.
7. Read the PEAK current on the LCD immediately
after the test.
g. Measuring Frequency
CAUTION!
Do not attempt to make frequency measurements with
test leads. The 293 measures the frequency by clamp-
ing the jaw around one conductor (wire). Clamping
around more than one wire will result in erroneous read-
ings.
Instrument set-up:
FUNC BLACK RED MIN MAX
TEST LEAD TEST LEAD READING READING
FREQ NOT USED NOT USED 0.5Hz 10KHz
Measurement Procedure:
1. Disconnect power to circuit to be measured.
2. Set the rotary switch to the FREQ function.
3. Clamp the jaws around one conductor of the circuit
to be measured.
4. Reconnect power to circuit to be measured.
5. Read the frequency on the 293.
Note:
The current of the frequency being measured is
displayed on the bar graph.
Optional Modes:
•
HOLD: Freezes the reading on the LCD.
• RANGE: Manually ranges the instrument.