Extech 380941 Käyttöohje
Extech
Mittauslaitteet
380941
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User Guide
AC/DC Mini Clamp Meter
Model 380941
380941-EN-V3.2-3/12
2
Introduction
Congratulations on your purchase of Extech’s DC/AC Clamp Meter. This professional meter, with
proper care, will provide years of safe reliable service.
Front Panel Description
1. Current sense jaw
2. Measurement Trigger
3. Function switch
4. Data Hold key
5. Max Min key
6. One-touch DCA zero key
7. LCD Display
8. 40 segment bargraph display
9. Positive input terminal for V, HZ and Ω
10. COM terminal
International Symbols
!
!
!
!! Caution ! Refer to the explanation in this Manual
Caution ! Risk of electric shock
Earth (Ground)
Safety
This meter has been designed to be safe in use, but the operator must use caution in its operation.
The rules listed below should be carefully followed for safe operation.
1. NEVER apply voltage or current to the meter that exceeds the specified maximum:
2. USE EXTREME CAUTION when working with high voltages.
3. DO NOT measure voltage if the voltage on the "COM" input jack exceeds 500V above earth
ground.
4. NEVER connect the meter leads across a voltage source while the function switch is in the
current, resistance or diode mode; doing so can damage the meter.
5. ALWAYS discharge filter capacitors in power supplies and disconnect the power when making
resistance or diode tests.
6. ALWAYS turn off the power and disconnect the test leads before opening the back to replace
the fuse or batteries.
7. NEVER operate the meter unless the back cover and the battery/fuse door are in place and
fastened securely.
380941-EN-V3.2-3/12
3
Operation
AC Current Measurements
WARNING: To avoid electric shock, disconnect the test leads from the meter before making current
measurements.
1) Set the Function switch to the 40 or 200A AC range.
2) Press the jaw trigger and clamp around, fully enclosing a single conductor. Do not allow a gap between the
two halves of the jaw.
3) Read the ACA value on the LCD.
DC Current Measurements
WARNING: To avoid electric shock, disconnect the test leads from the meter before making current
measurements.
1) Set the Function switch to the 40 or 200A DC range.
2) Press the DCA zero key to null the meter display.
3) Press the Trigger to open the current sense Jaw.
4) Fully enclose the conductor to be measured. Do not allow a gap between the two halves of
the jaw.
5) Read the DCA value on the LCD.
AC Voltage Measurements
WARNING: To avoid electric shock or damage to the meter, do not make any voltage
measurements that exceed the maximum specified.
1) Set the Function switch to the VAC position.
2) Insert the test leads to the meter as follows: Red lead to “V,Hz,Ω” terminal; Black lead to the
COM input.
3) With the pointed end of the test leads measure voltage. Remember that voltage
measurements are made in parallel with the device or circuit under test.
4) Read the ACV value on the LCD.
DC Voltage Measurements
WARNING: To avoid electric shock or damage to the meter, do not make any voltage
measurements that exceed the maximum specified.
1) Set the Function switch to the VDC position.
2) Insert the test leads to the meter as follows: Red lead to “V,Hz,Ω” terminal; Black lead to the
COM input.
3) With the pointed end of the test leads measure voltage. Remember that voltage
measurements are made in parallel with the device or circuit under test.
4) Read the DCV value on the LCD.
Resistance and Continuity Measurements
WARNING: To avoid electric shock or damage to the meter, remove power to the circuit under test and discharge
all capacitors.
1) Set the Function switch to the Ω position.
2) Insert the test leads to the meter as follows: Red lead to “V,Hz,Ω” terminal; Black lead to the
COM input.
3) With the pointed end of the test leads measure resistance. Remember that resistance
measurements are made in parallel with the device or circuit under test.
4) Read the resistance value on the LCD.
5) If the resistance is less than 40Ω, the continuity beeper will sound.
Tuotetiedot
| Merkki: | Extech |
| Kategoria: | Mittauslaitteet |
| Malli: | 380941 |
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