Amprobe 37XR-A - Manuale d'uso - Pagina 3

Amprobe 37XR-A

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6

Measuring Inductance

See Figure

-10-

1.

Set the Function Switch to

mH

or

H

.

2.

If

RANGE

is displayed, press the

RANGE

button to enable autoranging.

3.

Connect the Test Leads: Red to

H mA

, Black to

COM

4.

Turn off power to the circuit being measured.

5.

Free at least one end of the inductor from the circuit.

6.

Connect the Test Probes across the inductor.

7.

Read the display.

Measuring Frequency

See Figure

-11-

1.

Set the Function Switch to

Hz

.

2.

If

%

is displayed, press the yellow button to display

Hz

.

3.

If

RANGE

is displayed, press the

RANGE

button to enable autoranging.

4.

Connect the Test Leads: Red to

Hz

, Black to

COM

5.

Connect the Test Probes to the signal source.

6.

Read the display.

Measuring Dutycycle

See Figure

-12-

1.

Set the Function Switch to

%

.

2.

If

Hz

is displayed, press the yellow button to display

%

.

3.

Connect the Test Leads: Red to

%

, Black to

COM

4.

Connect the Test Probes to the signal source.

5.

Read the display.

Measuring dBm

See Figure

-13-

The 37XR-A measures dBm relative to 1 mW referenced to 50

:

. That is,

10 dBm = 10 mW, 0 dBm = 1 mW, -10 dBm = 0.1 mW, etc.
1.

Set the Function Switch to

dBm

.

2.

Press the yellow button. The display shows

dBm

to verify the selection.

3.

Connect the Test Leads: Red to

, Black to

COM

4.

Connect the Test Probes to the signal source.

5.

Read the display.

Testing Logic Levels

See Figure

-14-

The 37XR-A tests logic levels for both TTL and CMOS logic. The meter displays

9

plus a

š

for a high-level (true) condition. The meter beeps and displays an

9

and

a

›

for a low-level (false) condition. See

Specifications

for the logic 1 and logic 0

voltage limits. Out-of-limits indications are dispalyed as

9

only, no

š›

or beep

occur

.

1.

Set the Function Switch to

LOGIC

2.

Press the

TTL CMOS

button to display the selected type.

3.

Connect the Test Leads: Red to

, Black to

COM

4.

Connect the black lead to logic common.

5.

Connect the red lead to the logic test point.

6.

Read the display.

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Altri modelli di multimetri Amprobe