- 19 -
LOGIC TEST (See Fig. 8)
The logic test indicates a TTL high, low or changing logic signal.
❶
Turn the
range switch to the logic position. The LCD will display a I0L and the word
“Logic.”
❷
Connect the black test lead to circuit common or ground point and
the red lead to the test point. A logic LOW will display the down arrow a with a
tone, a logic HIGH the up arrow without tone, and a changing signal will alternate
the arrows and tone. Above 15Hz the tone may be intermittent then go steady
above 100Hz. Above 200Hz the up/down arrows both stay on solid. See the “
MEM” button instructions for detecting fast pulses and waiting for one-shot
changes without having to observe the meter.
FUSED
MAX
430mA
MAX
mA
10A
V
COM
CAT II1000V
CAT III 600V
FUSED
10A MAX
1000V
750V
OFF
V
V
430
uA
LOGIC
430
mA
43
mA
GND
TTL
10A
REL
Logic Test enabled
(Use " MEM" to enable and clear)
Pulse Indicator
High Pulse
Present
(no tone)
Low Pulse Present (tone)
RANGE
HOLD
220
MEM
A
LOGIC MEM
LOGIC MEM
2
1
red
rot
roja
rouge
LOGIC TEST
SLEEP
OFF
MIN MAX
Fig. 8
220.Man.08.00 9/11/00 6:05 PM Page 19
