380224 Ver. 1.5 5/05
5
Support line (781) 890-7440
Technical support: Extension 200; E-mail: support@extech.com
Repair & Returns: Extension 210; E-mail: repair@extech.com
Product specifications subject to change without notice
For the latest version of this User’s Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451
Frequency Measurements
a. Set the rotary switch to the "Hz" position.
b. Connect the RED test lead to the "V/ " input terminal and the BLACK test lead to the
COM (-) input terminal.
c. Connect the test leads to the points of measurement and read the frequency value in
hertz (Hz) on the meter's LCD.
Phase Indicator Measurements
a. Set the rotary switch to the "3 Ø RST" position.
b. Connect the RED test lead to the "R" input terminal, the BLACK test lead to the "S"
input terminal, and the YELLOW test lead to the "T" input terminal.
c. Remove power to the 3Ø device before touching test leads to the measurement points.
d. Attach test leads to the measurement points and apply power to the device under test.
e. If the wiring is correct with regard to phase, the RST and "OK" LCD icons will appear
and the audible tone will sound continuously. If the connection is incorrect, the "ER"
LCD icon will appear. If the error icon (ER) is displayed, remove power to the device
under test, reconfigure the wiring before applying power again, and test for correct
phase. Repeat as necessary.
Maintenance
Battery Replacement
The battery symbol on the LCD alerts the user of low battery voltage. Remove the test
leads from the circuit under test before replacing battery.
a. Remove the test leads and turn the meter OFF
b. Remove the three (3) screws from the rear of the meter. Open the meter housing.
c. Replace the battery with a 9V NEDA 1604 or equivalent, reassemble meter, and
replace screws.
Electromagnetic Interference
Electrical noise or intense EMF in the vicinity of the meter may disturb the measurement
circuit. The meter may respond to unwanted signals that may be present within the
measurement circuit. Users should exercise care and take appropriate precautions to
avoid misleading measurements in the presence of electromagnetic interference.
Calibration and Repair Services
Extech offers complete repair and calibration services for all of the products we sell. For
periodic calibration, NIST certification or repair of any Extech product, call customer
service for details on services available. Extech recommends that calibration be
performed on an annual basis to insure calibration integrity.
