Hioki PW3337 Service Manual

Part names

Switches the display channel
(when in the shift state,
changes the rectifier).

Switches display parameters.

Displays measured values
and settings.

HRM: switches to the harmonic display.
ST ART/STOP: Starts and stops integration; resets integrated values.
HOLD: Switches between the hold, maximum value, and minimum

value displays.

SHIFT: Press to access functions shown in blue.

POWER switch

Warning display lamps
(for each channel)

Switches the voltage range. Switches the current range.

Switches the voltage and current
range channel (applies to both
voltage and current ranges).

Status display lamps
(for each channel)

Function settings

PW3336

PW3336-01, PW3336-02, PW3336-03

PW3337

PW3337-01, PW3337-02, PW3337-03

POWER METER

Measurement Guide

June 2013 Edition 1 Printed in Japan

PW3336A984-00 13-06H

Thank you for purchasing the HIOKI PW3336, PW3336-01, PW3336-02,
PW3336-03, PW3337, PW3337-01, PW3337-02, or PW3337-03 Power
Meter. This Measurement Guide introduces basic measurement methods
to individuals using the instrument for the first time. Be sure to review the
Instruction Manual before using the instrument.

1. Connecting the instrument

Example 1: 1P2W

Before connecting the instrument, read “Operating Precautions” in
the Instruction Manual carefully.

Inverter

Power supply

Wiring diagram

CH(3)

Example 2: 3V3A

Motor

Inverter

Power
supply

Wiring diagram

CH(3) CH(1)CH(2)

2. Turning on the instrument

: Power ON

21

Connect the power cord. Turn on the POWER switch.

Do not activate input to the instrument before it has been turned on.

3. Selecting the wiring mode

Display

Description

1P2W×3
(PW3336: 1P2W×2)

Allows you to measure three 1-phase/2­wire circuits. (PW336: Allows you to
measure two such circuits.)

1P3W&1P2W
(PW336: 1P3W only)

Measures a 1-phase/3-wire circuit with
CH1 and CH2. The PW3337 can simul­taneously measure a 1-phase/2-wire
circuit with CH3.

3P3W&1P2W
(PW336: 3P3W only)

Measures a 3-phase/3-wire circuit with
CH1 and CH2 and measures active
power using the two-power-meter
method. The PW3337 can simultane­ously measure a 1-phase/2-wire circuit
with CH3.

Display

Description

3P3W2M

Measures a 3-phase/3-wire circuit with CH1 and CH2 and
measures active power using the two-power-meter
method. Calculates line voltage and phase current, which
are not actually measured, using vector calculations and
displays the result as the CH3 voltage and current.

3V3A

Measures a 3-phase/3-wire circuit with connections for all
line voltages and phase currents and measures the
active power using the two-power-meter method.

3P3W3M

Measures a 3-phase/3-wire circuit. Uses the same con­nections as the 3V3A wiring mode but converts line volt­ages into phase voltages by means of vector calculations
and displays the results.

3P4W Measures a 3-phase/4-wire circuit.

Press to select the wiring mode.

Display Description

V Voltage (U)
A Current (I)

W Active power (P)

VA Apparent power (S)

var Reactive power (Q)

PF Power factor (λ)

° Phase angle ()

V, Hz

or

A, Hz

Frequency (f)

Wh, + Positive direction Wh

Wh, - Negative direction Wh

Wh Total Wh

4. Selecting the display

Press to light up the blue lamp before setting functions shown in blue underneath
the keys.

Display Description

Ah, + Positive direction Ah

Ah, - Negative direction Ah

Ah Total Ah

TIME Integration time

V, pk Voltage waveform peak value

A, pk Current waveform peak value
η1 or η2 Efficiency (η)
CF, %, V Voltage crest factor

CF, %, A Current crest factor

T.AV, W Time average active power

T.AV, A Time average current

RF, %, V Voltage ripple rate

Shift state

Select the parameters to display by pressing the parameter key.

Display

Description

CH1 Lights up when displaying CH1 measured values.
CH2 Lights up when displaying CH2 measured values.
CH3 Lights up when displaying CH3 measured values.

sum

Lights up when displaying measured values for
the sum of the selected display parameters when
using a wiring mode other than 1P2W.

Display

Description

AC+DC

AC + DC measurement; display of true RMS values for
both voltage and current

AC+DC

Umn

AC + DC measurement; display of mean value rectified
RMS converted values for voltage and true RMS values
for current

DC DC measurement; display of the DC component only
AC AC measurement; display of the AC component only

FND

Display of the fundamental wave component from harmonic
measurement

Select the rectifier by pressing the CH key while holding
down the SHIFT key.

Press the CH key to select the channel to display.

Display Description

RF, %, A Current ripple rate
THD, %, V Total harmonic voltage distortion
THD, %, A Total harmonic current distortion

FND, θ, V, °

Inter-channel voltage fundamental
wave phase difference

FND, θ, A, °

Inter-channel current fundamental
wave phase difference

HRM, V, LEVEL Harmonic voltage RMS value
HRM, A, LEVEL Harmonic current RMS value

HRM, W, LEVEL Harmonic active power RMS value

HRM, %, V, HD% Harmonic voltage content percentage

HRM, %, A, HD% Harmonic current content percentage

HRM, %, W, HD%

Harmonic active power content
percentage

5. Selecting the voltage and current ranges

To select auto-range operation,
set after pressing .

The lamp for the selected range key will light up, and the display value will correspond to the range.

Voltage range Current range

Example: Voltage range: CH1, 300 V; current range: CH1, 20 A

Switches the channel for which the
range is being set (applies to both
voltage and current ranges).

2 Integration will start, and the RUN lamp will light up.

6. Performing integration

Integration is performed to measure the amount of power consumed in the set amount of time. In the example shown, the
integration time has been set to 24 hours.

Performing integration Stopping integration

1 Press .

2 Integration will stop, and the RUN lamp will flash.

1 Press while the RUN lamp is lit up.

Troubleshooting

While integration is being performed ( the RUN lamp is lighting) or stopped (the RUN lamp is flashing), range, wiring
mode or other settings cannot be changed. To change settings or perform functions, follow the procedure describ ed
below. Integrated value will be reset by this operation.

Procedure

If integration is stopped (if the RUN lamp is flashing), skip to Step 2.

1 Press to stop integration.

The RUN lamp, which had been lit up, will start flashing.

2 Press to place the instrument in the shift state.

The blue lamp will light up.

3 Press .

The RUN lamp will turn off, and integrated values will be reset.
You can now change settings.

* Wiring mod e, current input method, frequ ency measure ment range (zero-cross filter), timeout, inte gration time, synchronization

source, VT ratio, CT ratio, harmonic analysis order upper limit value, zero-adjustment (can be performed while integration is
stopped)

If the instrument displays an error, see “Troubleshooting” in the instruction manual (for example , etc.).

If an error is being displayed

Even if the keys are pressed, no settings can be changed

( is displayed).

?

7. Turning off the instrument

: Power OFF

Once measurement is complete, turn off the
instrument and disconnect connection cables
and other wiring.

Turn off the POWER switch.