19
Making Measurements
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You can use an optional thermocouple module to
measure temperature with your meter. The
thermocouple module you use must output 1mV per
measured °C or °F. The meter can display
temperatures up to 999
°
C or 999
°
F.
1. Set the function selector to
°
°°
°
C/
°
°°
°
F /
V.
2.
Unplug both test leads from the meter, plug the
thermocouple’s common plug into
–COM
(common) on the front of the meter, then plug
the thermocouple’s +V plug into
+ V.mA.
Ω
ΩΩ
Ω
.
3. Press SELECT once to select temperature
measurement.
4. To select the temperature range you want to
display (
°
C or
°
F), repeatedly press RANGE
until
9
99
9 or <
<<
< appears.
5. Touch the thermocouple’s sensor head to the
object you want to test.
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1. Set the function selector to dBm / ~ V.
R
2. Repeatedly press SELECT to select the
measurement unit you want to use (dBm or
volts).
±
In dBm mode
, relative measurement and moni-
tor modes are disabled.
In the 400 V and 400mV ranges
, the decimal
point appears in the same position (one place
to the left). To distinguish between the two
ranges,
cL
cLcL
cL appears in the 400mV range and L
LL
L
appears in the 400 V range.
3.
If the meter is set to automatic range control
,
the meter automatically moves to the range
that gives the best reading.
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"
Displaying
Temperature
The thermocouple module
has not been evaluated by
Underwriters Laboratories
.
Do not use the thermo-
couple to measure objects
when the voltage is above
30 V RMS and 42.4 V peak
or 60V DC.
Measuring AC Voltage
• Never clamp a test lead
to a hot wire (usually red,
black, or blue in AC
wiring circuits). If one
lead is clamped to a hot
wire and you touch the
meter’s other probe, you
could receive an electric
shock.
• The maximum input limit
for AC voltage measure-
ment is 750 V AC (RMS).
To avoid electrical shock
and damage to the
meter, never try to
measure an AC voltage
above 750 volts RMS.
±
"016'"
±
"
0 dBm is equal to the
consumption power on a
600-ohm resistor with
0.775V voltage drop.
22-812.fm Page 19 Monday, April 8, 2002 1:32 PM
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