9
CM-450
Operation
Electric shock hazard:
Contact with live circuits could result in severe injury or
death.
1. Set the Selector switch according to the Settings Table. Momentarily press the
SELECT
button to select mode.
2. Refer to “Typical Measurements” for specific measurement instructions.
3. Test the unit on a known functioning circuit or component.
If the unit does not function as expected on a known functioning circuit,
replace the battery.
4. Take the reading from the circuit or component to be tested.
Settings Table
To measure
this value …
Set the Selector
switch to this
symbol …
This icon
will appear
on the
display …
Connect
red lead
to …
Connect
black
lead
to …
AC Current*
(600 A max.)
and
A
N/A
N/A
Frequency of a
current
(600 A max.)
and press
Hz
Hz
N/A
N/A
Voltage
(600 V max.)
and
V
+
COM
and
V
Frequency of a
voltage signal
or
and press
Hz
Hz
+
COM
Resistance
MΩ
+
COM
Continuity**
and press
SELECT
Ω
+
COM
Diode
and press
SELECT
2 times
and
V
+
COM
* AC current measurements are made using the jaw.
** Tone indicates continuity. The threshold is between 5 Ω and 120 Ω.
•
www.calcert.com
1.800.544.2843
0
5
10
15
20
25
30
