MI 2792 PowerQ4 Plus
Recording Practice and Instrument Connection
85
Step 1: Instrument setup
On site measurements can be very stressful, and therefore it is good practice to prepare
measurement equipment in an office. Preparation of PowerQ4 Plus include following
steps:
Visually check instrument and accessories.
Warning:
Don’t use
visually damaged equipment!
Always use batteries that are in good condition and fully charge them before you
leave.
Note:
Keep your batteries in good condition.
In problematic PQ environment
where dips and interrupts frequently occurs instrument power supply fully
depends on batteries!
Download all previous records from instrument and clear the memory. (See
section 3.10 for instruction regarding memory clearing)
Set instrument time and date. (See section 0 for instruction regarding time and
date settings)
Step 2: Measurement setup
Measurement setup adjustment is
performed
on measured site, after we find out details
regarding nominal voltage, currents, type of wiring etc.
Step 2.1: Synchronization and wiring
Connect current clamps and voltage tips to the “Device under measurement”
(See section 4.2 for details).
Select proper type of connection in “Connection setup” menu (See section 3.16.1
for details).
Select synchronization channel. Synchronization to voltage is recommended,
unless measurement is performed on highly distorted loads, such as PWM
drives. In that case current synchronization can be more appropriate. (See
section 3.16.1 for details).
Select System frequency. System frequency is default mains system frequency.
Setting this parameter is recommended if user measure signalling or flickers.
Step 2.2: Voltage range and ratio
Select proper voltage range according to the network nominal voltage.
Note:
For 4W and 1W measurement
all voltages are specified as phase-to-
neutral (L-N). For 3W measurements all voltages are specifies as phase-to-
phase (L-L)
Note:
Instrument assures proper measurement up to 150 % of chosen nominal
voltage.
In case of indirect voltage measurement, select voltage range: 50 V ÷ 110 V and
select “Voltage ratio” according to transducer ratio. (See section 3.16.1 for
details).
Step 2.3: Current clamps setup
Using “Current Clamps” menu, select proper clamps (see sections 3.16.1 for
details).
Select proper clamps parameters according to the type of connection (see
section 4.2.3 for details).
