- 16 -
Note:
*Range-Lock and Function-Lock Feature:
When a measurement
TM
reading is being displayed in
AutoCheck
mode, press the
RANGE
or
SELECT
button momentarily 1 time can lock the range
or function it was in. Press the button momentarily repeatedly to
step through the ranges or functions.
*As Hazardous-Alert
: When making resistance measurements in
TM
AutoCheck
mode, an unexpected display of voltage readings
alerts you that the object under test is being energized.
*Ghost - voltage Buster
: Ghost - voltages are unwanted stray
signals coupled from adjacent hard signals, which confuse
TM
common multimeter voltage measurements. Our AutoCheck
mode provides low (ramp-up) input impedance (approx. 2.5kΩ at
low voltage) to drain ghost voltages leaving mainly hard signal
values on meter readings. It is an invaluable feature for precise
indication of hard signals, such as distinguishing between hot and
open wires (to ground) in electrical installation applications.
TM
AutoCheck
mode input impedance increases abruptly from initial
2.5kΩ to a few hundred kΩ's on high voltage hard signals. “
LoZ
”
displays on the LCD to remind the users of being in such low
impedance mode. Peak initial load current, while probing 1000VAC
for example, can be up to 566mA (1000V x 1.414 / 2.5kΩ),
decreasing abruptly to approx. 3.37mA (1000V x 1.414 / 420kΩ)
TM
within a fraction of a second.
Do not use AutoCheck mode on
circuits that could be damaged by such low input impedance.
Instead, use rotary-switch selector or high input impedance
voltage modes to minimize loading for such circuits.
WARNING:
- 15 -
TM
This innovative
AutoCheck
feature automatically selects
Hz
measurement function of
ACV
,
DCV
, or
Resistance (
)
based on
the input via test leads.
CAUTION :
Before and after hazardous voltage measurements, test
the voltage function on a known source such as line voltage to
determine proper meter functioning.
OPERATION
TM
AutoCheck mode
●
With no input, the meter displays “Auto” when it is ready.
●
With no voltage signal but a resistance below 10M (nominal) is
present, the meter displays the resistance value. When the
resistance is below the “Audible Threshold”, the meter further gives
a continuity beep tone.
●
When a signal above the voltage threshold of 1.5V DC or AC up to
the rated 1000V is present, the meter displays the voltage value in
appropriate DCV or ACV, whichever larger in peak magnitude.
LoZ
LoZ
8.8.8.8
V
AUTO
6.003
AUTO
k
LoZ
LoZ
Auto
V
LoZ
LoZ
248.8
AV
1208
Hz
AUTO
