Major tech MT930 User manual

MT930
PHASE ROTATION METER
INSTRUCTION MANUAL

Introduction
The phase rotation indicator is a handheld instrument designed to detect the
rotary field of three-phase systems.
Symbols
The following symbols appear on the phase Rotation Meter or in this manual.
Elements of the Phase Rotation Meter
Determine the Rotary Field Direction
To determine the rotary field direction:
1. Connect the test probes to the end of the test leads.
2. Connect the test probes to the three mains phases.
3. Green ON indicator shows that the meter is ready for testing.
4. Either the clockwise or counter-clockwise rotary indicator illuminates
showing the type of rotary field direction present.
5. The rotary indicator lights even if the neutral conductor, N, is connected
instead of the test lead input jacks.
Earth
AC or DC
Conforms to EU directives
Risk of electric shock
Risk of danger. Important
information see manual
Hazardous Voltage
Equipment protected by double
or reinforced insulation
Over voltage (installation) Cat III, pollution
Degree 2 per IEC1010-1 refers to the level
of impulse withstand voltage protection
provided. Equipment of Over voltage CAT
III is equipped in fixed installations (e.g.
electricity meter and primary over-current
protection equipment.
CAT III
Figure 1. Phase Rotation Indicator
PHASE ROTATION INDICATOR
1
2
3
4
5
1. Test lead input jack
2. L1, L2, L3 Indicators
3. Counter-clockwise rotation LCD
indicator
4. Clockwise rotation LCD indicator
5. Brief instructions on instrument rear

Safety Information
Caution identifies conditions and actions that may damage the
MT930. Warning identifies conditions and actions that pose
hazard to the user.
Read First: Safety Information
To avoid possible electric shock or fire, do the following:
• Read the following safety information carefully before using or servicing
the instrument.
• Adhere to local and national safety codes.
• 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.
• 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 meter with any parts removed.
• Do not use the meter around explosive gas, vapor or dust.
• Do not use the meter in a wet environment.
Specifications
AC Voltage 40 to 690V
Frequency 15 to 400Hz
Current Pickup 1mA
Nominal Test Current 1mA
(per phase)
Phase Rotation Clockwise or Anti-clock wise
Visual Indication LCD
Operating Temperature 0°C to 40°C
Pollution Degree 2
Type of Protection IP40
Battery 9V
Dimensions 130 x 69 x 32mm
Weight 130g
Electrical Safety IEC 61010/EN61010,
IEC 61557-7/EN 61557-7
Protection Level CAT III 600V

www.major-tech.com www.majortech.com.au
[email protected] [email protected]
MAJOR TECH (PTY) LTD
South Africa Australia