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IM 253401-01E

5-3

Measuring / Displaying Voltage, Current, Active Power, Frequency,

Four Arithmetic Operation Value, Crest Factor and Peak Value

5.2 Measuring/Displaying Frequency

Relevant Keys

SCALING

AVG FILTER

STORE

RECALL

HARMONICS

SAMPLE

V OVER

A OVER

MODE

RMS

V MEAN

hour

min

min sec

VVA

var

TIME

VPF

deg

FUNCTION

AUTO AUTO

MODE

1Φ3W

VHz

TRIG

V RANGE A RANGE HOLD

ENTER

INTEGRATOR

START

HARMONICS MEMORY INTEG SET

STOP RESET

REMOTE

INTERFACE OUTPUT

LOCAL

SETUP

SHIFT

WIRING

3Φ4W

3Φ3W

3V3A

ELEMENT

123

FUNCTION ELEMENT

123

FUNCTION ELEMENT

123

*Shows the operation panel of the WT130. For the differences

between WT110 and WT130, refer to section 2.2, page 2-2, 2-3

Displays

relevant

keys and

indicator

Operating Procedure

1 Selecting the Display Function

Select either V Hz (voltage frequency) or A Hz (current frequency) by pressing the

FUNCTION key of display C.

FUNCTION

SHIFT

FUNCTION

SHIFT

FUNCTION

SHIFT

Display

V Hz A Hz

AhAh±

Wh±

Ah±

FUNCTION FUNCTION FUNCTION FUNCTION

FUNCTION

FUNCTIONFUNCTIONFUNCTIONFUNCTION

FUNCTION

Wh± and Ah± will light twice. and are displayed on the top of display C.

You can reverse the order by first pressing the SHIFT key followed by the FUNCTION key.

*1DisplayedonWT110/WT130withROMversion2.01orlater.

2 Selecting the Input Element

Select the input element by pressing the ELEMENT key of display C. The operation is the

same as the one described on page 5-1.

Explanation

Measurement Range

The measurement range lies from 10 to 50kHz. Depending on the internal timing, however,

measurements can be done in the range from 4 to 10Hz. At 100Hz/1kHz/10kHz/100kHz, the

measurement range is auto range.

Maximum Reading of the Display and Units

• Maximum reading : 9999

• Units : Hz

• Prefix : k

Selecting the Display Function

The following selections are available.

• V Hz: voltage frequency will be displayed

• A Hz: current frequency will be displayed

Selecting the Input Element

The type of input element which can be selected depends on the model number. Make your

selection after having verified your model number.

• 1/2/3: Displays the measurement values of element 1/2/3

• ∑ : Displays no measurement values, only dots.

Note

• In case the level of the input signal is low (below approx. 7%), or when the frequency is smaller than the

measurement range, the display will show “ErrLo”. When the frequency is larger than the measurement

range, the display will show “ErrHi”.

• This instrument measures the frequency after synchronizing to the cycle of the input signal. We

recommend to turn ON the filter when measuring an inverted waveform or a waveform with high noise.

However, depending on the signal’s frequency and level, “ErrLo” might appear on the display. Since the

filter’s cutoff frequency is 300Hz, the signal attenuates and no signal will be detected.

• Even when the filter is set OFF but the frequency exceeds the measurement range, “ErrLo” might appear

since no signal will be detected anymore due to the internal circuit’s attenuation.

Brand	YOKOGAWA
Model	WT110
Category	Measuring Instruments
Language	English

YOKOGAWA WT110 User Manual

Table of Contents

Questions and Answers:

YOKOGAWA WT110 Specifications

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