Extech Instruments 480400 User manual

User's Guide
Phase Sequence Tester
Model 480400
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Introduction
Congratulations on your purchase of the Extech Model 408400 Phase Sequence Tester. This
handheld instrument detects the phase sequence of three-phase systems. Color-coded test leads
are provided for connecting to the three mains phases of the system under test. This meter is
shipped fully tested and calibrated and, with proper use, will provide years of reliable service.
Safety
International Safety Symbols
!Caution ! Refer to the explanation in this Manual
Caution ! Risk of electric shock
Earth (Ground)
Double Insulation or Reinforced insulation
AC, Alternating Current or Voltage
DC, Direct Current or Voltage
Safety Procedures
To avoid possible electric shock or fire, observe the following:
Read the following information carefully before using or servicing the instrument.
Adhere to local and national safety codes.
Individual protective equipment must be used to prevent shock and injury.
Use of instrument in a manner not specified by the manufacturer may impair safety
features/protection provided by the equipment.
Avoid working alone.
Inspect the test leads for damaged insulation or exposed metal. Check test lead continuity.
Damaged leads must be replaced. Do not use the phase Rotation indicator if it appears
damaged.
Use care when working above 30V ac rms, 42V ac peak and 60V dc. Such voltages pose a
shock hazard.
When using the probes, keep fingers away from probe contacts. Keep fingers behind the finger
guards on the probes.
Measurements can be adversely affected by impedances of additional operating circuits
connected in parallel or by transient currents.
Verify operation prior to measuring hazardous voltages (voltages above 30V ac rms, 42V ac
peak and 60V dc).
Do not use the phase Rotation indicator with any of the parts removed.
Do not use the phase Rotation indicator around explosive gas, vapor, or dust.
Do not use the meter in a wet environment.
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Description
Meter Description
1. Test Lead alligator clips
2. Test lead input jacks
3. L1, L2, L3 display icons
4. Clockwise Rotation LCD Indicator R (right) and L (left)
icons
5. Sequence grid
Display Description
1. Line designators (L1, L2, and L3)
2. Color codes for test leads
3. Clockwise / Counter-Clockwise indicator
4. LEFT (L) or RIGHT (R) rotation direction
5. Phase Sequence grid
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480400‐en‐EU_V3.39/14
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Operation
Determine Phase Rotation Direction
1. Connect the supplied color-coded test leads to the meter’s test lead input jacks at the top of the
meter.
2. Connect the test probes to the three mains phases for the system under test.
3. L1, L2, and L3 indicators will illuminate one at a time on the meter’s LCD display as each phase
is connected.
4. The clockwise and counter-clockwise arrows with the left/right ‘L’ or ‘R’ icons display the phase
rotation direction of the device under test.
5. The sequence grid simply shows the three line sequences for Clockwise ‘R’ and the three line
sequences for Counter-Clockwise ‘L’.
Note: The rotational arrow indicators illuminate even if one of the test probes is connected to a
neutral or ground conductor instead of one of the mains phases.
Specifications
Nominal Voltage 40 to 600 VAC
Frequency Range (fn) 15 to 400HZ
Current pickup 1 mA
Nominal Test current (in per phase) 1 mA
Maximum Operating Voltage (Ume) 600 V
Operating Temperature 0 to 40oC (32 to 104oF)
Type of protection IP 40
Dimensions (H x W x D): 130 x69 x 32mm (5.1 x 2.7 x 1.3”)
Weight 130g (4.6 oz.)
Approvals CE (EU directives)
Safety For indoor use and in accordance with the requirements for double
insulation to IEC1010-1 (1995): EN61010-1 (1995) Overvoltage Category III
600V, Pollution Degree 2.
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ISO‐9001Certified
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