Amprobe AC75 User Manual

AC75B

AC Digital Clamp Multimeter

Users Manual

99 Washington Street
Melrose, MA 02176
Fax [phone]
TestEquipmentDepot.com

1

AC75B Clamp-on Multimeter

Contents

Safety Information ........................................................................................2

Symbols Used in this Manual........................................................................3

Introduction ..................................................................................................4

Making Measurements...............................................................................4

Additional Features ....................................................................................4

Product Maintenance ....................................................................................4

Maintenance...............................................................................................4

Cleaning.....................................................................................................4

Troubleshooting.........................................................................................5

Battery Replacement..................................................................................5

Repair ...........................................................................................................6

Specifications................................................................................................7

General Specifications................................................................................7

Environmental Specifications.....................................................................7

Electrical Specifications .............................................................................7

2

Safety Information

To ensure safe operation and usage of the meter, follow these instructions.
Failure to observe warnings can result in severe injury or death.

• To avoid possible electric shock or personal injury, follow these

guidelines:

• Do not use the meter if it is damaged. Before you use the meter,

inspect the case. Look for cracks or missing plastic. Pay particular
attention to the insulation surrounding the connectors.

• Inspect the test leads for damaged insulation or exposed metal.

Check the test leads for continuity.

• Replace damaged test leads before you use the meter.

• If this product is used in a manner not specified by the

manufacturer, the protection provided by the equipment may be
impaired.

• Do not use the meter if it operates abnormally. Protection may be

impaired. When in doubt, have the meter serviced.

• Do not operate the meter around explosive gas, vapor, or dust.

• Do not apply more than the rated voltage, as marked on the meter,

between terminals or between any terminal and earth ground.

• Before use, verify the meter’s operation by measuring a known

voltage.

• When measuring current, turn off circuit power before connecting

the meter in the circuit. Remember to place the meter in series with
the circuit.

• Do not attempt to repair this meter. There are no user serviceable

parts.

• Use caution when working above 30 V ac rms, 42 V peak, or 60 V

dc. Such voltages pose a shock hazard.

• When using the probes, keep your fingers behind the finger guards

on the probes.

• Connect the common test lead before you connect the live test lead.

When you disconnect test leads, disconnect the live test lead first.

• Remove test leads from the meter before you open the battery door.

• Do not operate the meter with the battery door removed or

loosened.

• To avoid false readings, which could lead to possible electric shock

or personal injury, replace the batteries as soon as the low battery
indicator (N) appears.

• Only use a 9 Volt battery, properly installed in the meter case, to

power the meter.

• To avoid the potential for fire or electrical shock, do not connect the

thermocouple to electrically live circuits.

• Disconnect circuit power and discharge all high-voltage capacitors

before testing resistance,continuity, diodes, or capacitance.

3

Symbols Used in this Manual

N

Battery

W

Refer to the manual

T

Double insulated

X

Dangerous Voltage

F

Direct Current

J

Earth Ground

B

Alternating Current

R

Audible tone

;

Conforms to relevant
Australian standards.

)

Canadian Standards
Association
(Canadian and US)

P

Complies with EU
directives

, Application around and

removal from HAZARDOUS
LIVE conductors is
permitted.

4

Introduction

The AC75B digital clamp-on multimeter, is a fully featured meter that also
measures temperature using a Type K probe (included). The AC75B has full
Category safety ratings and is CAT III, 600 V.

Making Measurements

Measurement Functions

• AC and DC Volts (V/v) See Figure -4-

• Resistance (O) See Figure -5-

• Diode/Continuity (G/C) See Figure –6-

• DC Current (DC μA) See Figure –7-

• Capacitance (P) See Figure –8-

• Temperature (°C/°F) See Figure –9-

• AC Current (a) See Figure –11-

Additional Features

Auto Power Off/Auto Power Off Disable See Figures -2- and –3-
The meter will automatically shut itself off after approximately 10 minutes

after power is turned on, or no activity has occurred with the meter. The
meter will beep when it turns off. Turn the rotary dial to reactivate the
meter.

The Auto Power Off feature can be disabled to keep the meter from going to
sleep. Press the BACKLIGHT button and then switch the rotary knob to
power on the meter.
Backlight See Figure -12-

The AC75B backlight illuminates the entire display for easy measurement
viewing in dark work environments. The backlight is activated for 60
seconds once the button is pressed.

HOLD Measurements See Figure -10-
The HOLD button allows the meter to capture and continuously display a

measurement reading. To use the HOLD feature, make a measurement,
when the reading has stabilized, press the HOLD button. The measurement
value will be captured on the display. Press the HOLD button again to
release the value.

Product Maintenance

Maintenance

Do not attempt to repair this meter. It contains no user serviceable parts.
Repair or servicing should only be performed by qualified personnel.

Cleaning

To clean the meter, periodically wipe the case with a soft moistened cloth.
To avoid damage to the plastic components do not use benzene, alcohol,
acetone, ether, paint thinner, lacquer thinner, ketone or other solvents to
clean the meter.

5

Troubleshooting

If the meter appears to operate improperly, check the following items first.

1. Review the operating instructions to ensure the meter is being used

properly.

2. Make sure the battery is in good condition. The low battery symbol N

appears when the battery falls below the level where accuracy is
guaranteed. Replace a low battery immediately.

Battery Replacement

To replace the battery

1. Turn the meter off and remove the test leads.

2. Loosen the screw and remove the battery door.

3. Replace the battery using an alkaline 9 V battery. See General

Specifications for detailed battery specifications.

4. Replace the battery cover and tighten the screw. Recycle the battery

using approved methods.

XWWARNING

To avoid electrical, shock remove the test leads from both the meter and
the test circuit before accessing the battery or the fuses.