Hioki 3331 Instruction Manual

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Page 1

Instruction Manual

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3331

品名を入力。

POWER HiTESTER

June 2011 Revised edition 10 3331A981-10 11-06H

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Contents

Introduction Inspection Safety Notes Notes on Use

Chapter 1 Overview 1

1.1 Product Overview

1.2 Features

1.3 Principles of the Two-Power Method of Power Measurement and V3and I

1.4 Identification of Controls and Indicators

1.5 Explanation for Keys

1.6 Display Reference

1.7 Handle and Stand Operations

Measurement

iii

1 2

3 4 5 7

Chapter 2 Preparation for Measurement 11

2.1 Before Measurement

2.2 Simple Use

2.3 Making the Connections

2.3.1 Direct Connections 14

2.3.2 When Using PT or CT 16

2.3.3 Notes on Connection Methods 17

2.4 Powering On

2.5 Self Test

11 13 14

18 19

Chapter 3 Basic Operation 21

3.1 Selecting the Connection Mode

3.2 Changing the Response Setting

3.3 Selecting the Rectifier Type

3.4 Selecting the Display

3.5 Selecting the Range

21 23 24 25 27

3.6 Holding the Display

3.6.1 Restrictions During the Hold Status 29

3.6.2 Current Waveform Peak Hold Function and Maximum Value Measurement 30

3.6.3 Restrictions During the Peak Hold Status 31

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Chapter 4 Settings and Operations 33

4.1 Setting Items

4.2 Operating Setup Keys

4.3 Setting the Integration

4.3.1 Flowchart 35

4.3.2 Integration Setting Method 35

4.3.3 Integration Operation 36

4.3.4 Notes on Integration 37

4.3.5 Display Format of Integrating Value 40

4.4 Setting the Number of Averaging

4.4.1 Flowchart 41

4.4.2 Average Setting Method 41

4.5 Setting the Frequency

4.5.1 Flowchart 43

4.5.2 Frequency Setting Method 43

4.6 Setting the D/A Output

4.6.1 Flowchart 45

4.6.2 D/A Output Setting Method 45

33 34 35

4.7 Setting the PT (Voltage Transformer) and CT (Current Transformer) Ratios

4.7.1 Flowchart 49

4.7.2 PT and CT Ratios Setting 49

4.8 Setting the Printer Output

4.8.1 Flowchart 51

4.8.2 Printer Output Setting Method 51

4.8.3 Connecting to the Printer 54

4.9 Setting the Interface

4.9.1 Flowchart 55

4.9.2 Interface Setting 55

Chapter 5 Setting and Measurement Example 59

5.1 Electrical Power Integration and Printer Output Examples

5.2 PT and CT Setting

Moving the Decimal Point)

(Examples of Changing the Digits and

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Chapter 6 Other Functions 67

6.1 When Power Fails

6.2 System Resetting

6.3 Error Indications

6.4 Changing the Power Calculation Circuit Clock Frequency

6.5 Key Lock State

67 68 69 70 71

Chapter 7 External Control Terminal and Output Terminal 73

7.1 Connector Pin Assignment

7.2 Output Terminal

7.3 External Control Terminal

7.4 Making the Connections

73 75 76 78

Chapter 8 GP-IB･RS-232C Interface 79

8.1 Specifications

8.1.1 GP-IB Interface 79

8.1.2 RS-232C Interface 80

8.2 Identification of Controls and Indicators

8.3 Interface Outline

8.3.1 Features 84

8.3.2 Messages 84

8.3.3 Command Syntax 85

8.3.4 Headers 85

8.3.5 Message Terminators 86

8.3.6 Separators 86

8.3.7 Data Formats 87

8.3.8 Abbreviation of Compound Commands 87

8.3.9 Output Queue 88

8.3.10 Input Buffer 89

8.3.11 Status Model 89

8.3.12 Status Byte Register 90

8.3.13 Event Registers 91

8.3.14 GP-IB Commands 96

8.4 Command Reference

83 84

8.4.1 Standard Commands 98

8.4.2 Commands Specific to the 3331 106

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8.5 Command Summary

8.5.1 Standard Commands 149

8.5.2 Commands Specific to the 3331 150

8.5.3 Valid Command According to Condition (Standard Command) 153

8.5.4 Valid Commands According to Condition (Specific Command) 154

8.5.5 Execution Time of GP-IB Interface Command 157

8.5.6 Initialization 158

8.5.7 Specific Command Tree 159

149

8.6 Sample Programs

8.6.1 GP-IB 161

8.6.2 RS-232C 162

8.7 Printer Output Function

8.7.1 Printer Mode Function 163

8.7.2 Type of Printing 163

8.7.3 Selecting Printing Items and Setting Printing Interval Time 164

8.7.4 Printer Output Buffer 164

8.7.5 Printing in Power Cut 164

8.7.6 Printing Example 165

8.8 Device Compliance Statement

8.9 Notes on Interface

8.9.1 GPｰIB Troubleshooting 172

8.9.2 RS-232C Troubleshooting 174

161

163

170 172

Chapter 9 Maintenance and Service 175

9.1 Disposing

9.2 Cleaning and Storing of the Unit

175 176

Chapter 10 Rack Mounting 177

10.1 Making Rack Mounting Fittings

10.2 Installation Procedures

177 180

Chapter 11 Specifications 183

11.1 General Specifications

11.2 Standard Specifications

11.3 Function Specifications

183 185 189

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Introduction

Thank you for purchasing this HIOKI "3331 POWER HiTESTER." To get the maximum performance from the unit, please read this manual first, and keep this at hand.

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Introduction

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Inspection

When the unit is delivered, check and make sure that it has not been damaged in transit. In particular, check the accessories, panel switches, and connectors. If the unit is damaged, or fails to operate according to the specifications, contact your dealer or HIOKI representative.

■ Standard accessories

Instruction Manual 1 Power cord 1 Connector (DB-25P-N) 1 (Japan Aviation Electronics Industry, Limited or equivalent)

(Shell DB19678-2)

■ Shipment

NOTE

If the 3331 unit is to be shipped or transported, the original packing should preferably be used. If this is not available, employ the following procedure.

1. Procure a packing case somewhat larger than the unit, such as a cardboard box.

2. Wrap the unit in plastic sheeting.

3. Pack the unit wrapped in this cushioning material into the box, pack in the accessories, add more cushioning to fill the box tightly, and then seal it with adhesive tape. If required, secure the case with shipping twine.

When reusing the original for the unit, use cushioning to secure the unit so the unit will not move around in the box.

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Inspection

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Safety Notes

This Instruction Manual provides information and warnings essential for operating this equipment in a safe manner and for maintaining it in safe operating condition. Before using this equipment, be sure to carefully read the following safety notes.

DANGE R

Safety symbols

This equipment is designed according to IEC 61010 Safety Standards, and has been tested for safety prior to shipment. During high voltage measurement, incorrect measurement procedures could result in injury or death, as well as damage to the equipment. Please read this manual carefully and be sure that you understand its contents before using the equipment. The manufacturer disclaims all responsibility for any accident or injury except that resulting due to defect in its product.

・ This symbol is affixed to locations on the equipment where the

operator should consult corresponding topics in this manual (which are also marked with the symbol) before using relevant functions of the equipment.

・ In the manual, this mark indicates explanations which it is

particularly important that the user read before using the equipment.

Indicates a grounding terminal.

Indicates AC (Alternating Current).

The following symbols are used in this Instruction Manual to indicate the relative importance of cautions and warnings.

DANGE R

Indicates that incorrect operation presents extreme danger of accident resulting in death or serious injury to the user.

WARNING

Indicates that incorrect operation presents significant danger of accident resulting in death or serious injury to the user.

CAUTION

NOTE

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Indicates that incorrect operation presents possibility of injury to the user or damage to the equipment.

Denotes items of advice related to performance of the equipment or to its correct operation.

Safety Notes

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Measurement categories

This instrument complies with CAT III safety requirements. To ensure safe operation of measurement instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as CAT II to CAT IV, and called measurement categories.

CATⅡ

CATⅢ

CATⅣ

Primary electrical circuits in equipment connected to an AC electrical outlet by a power cord (portable tools, household appliances, etc.) CAT II covers directly measuring electrical outlet receptacles.

Primary electrical circuits of heavy equipment (fixed installations) connected directly to the distribution panel, and feeders from the distribution panel to outlets.

The circuit from the service drop to the service entrance, and to the power meter and primary overcurrent protection device (distribution panel).

Using a measurement instrument in an environment designated with a higher-numbered category than that for which the instrument is rated could result in a severe accident, and must be carefully avoided.

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Safety Notes

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Notes on Use

In order to ensure safe operation and to obtain maximum performance from the unit, observe the cautions listed below.

DANGE R

WARNING

This unit cannot be used on voltage lines of 600 Vrms. If the

voltage exceeds 600 VAC, there will be a short-circuit accident or electrocution accident will result.

The maximum input voltage and current are 600 Vrms, 60 Arms. Do

not exceed the maximum input voltage and current. Doing so can damage the unit or cause a serious accident.

The maximum rated voltage between input terminals and ground is

600 Vrms. Attempting to measure voltages exceeding 600 Vrms with respect to ground could damage the instrument and result in personal injury.

Always connect the powermeter input to the secondary side of the

breaker. On the secondary side of a breaker, even if the lines are shorted the breaker can trip and prevent an accident. On the primary side, however, the current capacity may be large, and in the event of a short-circuit there may be a serious accident.

Before turning on the power, make sure that the voltage of the power

supply being used matches the supply voltage indicated on the rear panel of the unit. If an attempt is made to use an improper supply voltage, there is danger of damage to this unit and of life-threatening risk to the operator.

In order to prevent electric shock and short-circuit accidents, shut

off the power to the line to be measured before connecting the

direct connection voltage and current cables to the terminals.

Be sure to connect the voltage input terminals or current input

terminals correctly. Measurement which is attempted with the wiring connected incorrectly may cause damage to the unit or a shortcircuit.

Since the power switch is of a micro gap construction, always use near an outlet. When not in use and when connecting a device to be measured, make sure that the power cord is unplugged, or any other means so that the unit is cut off from the power.

The unit is constructed so as to be connected to a ground line via a

three-core power cord that is supplied with the unit. In order to

avoid electric shock, connect the unit to a properly grounded (3-pin)

outlet using the power cord provided.

Do not remove the case of the unit. There are components inside

carrying high voltages or becoming hot, and this could cause an electric shock accident.

Do not use the unit where it may be exposed to corrosive or

explosive gases. The unit may be damaged, or explosion may occur.

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Notes on Use

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CAUTION

・ Before measurement, check the position of the measurement range.

The unit may be damaged if voltage or current at levels in excess of the measurement limit is applied for a long time.

・ To avoid damage to the unit, do not short the output terminal and do

not input voltage to the output terminal.

・ Do not store or use the unit where it will be exposed to direct sunlight,

high temperatures, high humidity, or condensation. If exposed to such conditions, the unit may be damaged, the insulation may deteriorate, and the unit may no longer satisfy its specifications.

・ This unit is designed for indoor use and can be safely used at

temperatures ranging from 0℃ to 40℃.

・ To avoid damage to the unit, do not subject the equipment to

vibrations or shocks during transport or handling. Be especially careful to avoid dropping the equipment.

・ Should the unit emit smoke, or a strange smell or strange sound,

immediately stop testing operations, power the unit off, and remove the power cord from the outlet, shut off the circuit being tested, disconnect the unit, and consult your HIOKI representative. Continued use of the unit could lead to fire or electric shock accidents.

・ Do not insert foreign objects through the ventilation holes. Particularly

if metallic, liquid, or combustible substances get inside the case, this may lead to fire or electric shock, or to malfunction.

・ Do not use the unit near any device which generates strong

electromagnetic radiation or near a static electrical charge, as these may cause errors.

・ To prevent electric shock, do not allow the unit to become wet and do

not use the unit when your hands are wet.

・ This unit is not constructed to be waterproof or dustproof, so do not

use it in a very dusty environment or in one where it will get wet.

・ Do not place the unit on an unstable stand, or in an uneven location. It

may fall to the ground, or fall over, and either of these events may lead to malfunction or accident.

・ Avoid treading on or pinching the cable so as not to damage the cable

sheaths.

・ Keep the cables well away from heat, to prevent the possibility of

melting the insulation. ・ For long-term storage, remove the power cord. ・ Do not use the unit near any device which generates strong

electromagnetic radiation or near a static electrical charge, as these

may cause errors. ・ The recommended calibration interval for this instrument is six months.

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Notes on Use

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NOTE

･ This unit uses the two-power method for measuring a three-phase line. For

this reason, if there is a leakage current from the line being measured, or in a four-wire three-phase system, accurate measurement is not possible.

･ This unit is electrically configured specifically for AC currents. Thus signals

with elements of DC currents (such as all-wave rectifier) cannot be measured.

･ For accurate measurement, allow the unit to warm up for more than half an

hour before starting operation.

･ Note that limits are specified for the range in which voltage and current level

accuracies are guaranteed.

･ The values for apparent power (S), reactive power (Q), power factor (λ)and

phase angle (φ) produced by this unit are computed from the measured voltage (U), current (I), and active power (P), using the expressions given in the specifications. The values given may be different from those measured with an instrument of different operating principles or using different calculation expressions.

･ This machine's integration value is derived from the measured values of the

electrical current and electrical power and calculated by the software. The integration value may be different from other instruments that have differing response times, sample rate or calculation expressions.

･ Accurate measurement may be impossible in locations subject to strong

external magnetic fields, such as transformers and high-current conductors, or in locations subject to strong external electric fields, such as radio transmission equipment.

･ Due to the internal circuitry, when measuring objects that contain certain

specific wave lengths, the indicated value of power may periodically shift and not settle down. (Specifically, this occurs when measuring distorted waves containing a large amount of high frequency waves which are the even number multiple of 2.44 kHz.)

･ When the input is less than 0.1% of the measurement range, the indication is

forcibly set to zero.

･ The 3331 has a frequency measurement function, but this may produce

unexpected results on a waveform which is severely distorted.

･ When a maximum rated voltage to earth of high frequency is applied (as for

example when measuring the secondary side of an inverter), errors may occur in the measured values.

･ To ensure the accuracy of measurement be careful not to let the unit

overheat. (Keep away from sources of heat, and provide sufficient ventilation space around the unit, or when rack-mounted provide a cooling fan.)

･ This instrument may cause interference if used in residential areas. Such use

must be avoided unless the user takes special measures to reduce electromagnetic emissions to prevent interference to the reception of radio and television broadcasts.

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Notes on Use

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Notes on Use

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Chapter 1

1.1 Product Overview

The 3331 POWER HiTESTER is a power tester for AC three-phase threewire and single-phase, which is suitable for measuring the three phase products and three phase power line. With this one unit, it is possible to measure voltage, current, active power, apparent power, reactive power, the power factor, phase angle, frequency and integrated value. By using the peak-hold function, the peak value of the current waveform during powering on can be measured.

Overview

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1.1 Product Overview

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1.2 Features

(1) Meets the safety requirements of IEC61010 (2) Wide broad band from 10 Hz to 100 kHz. (3) In reactive power, power factor, and phase indication, it is possible to

recognize the phase is lead or lag.

(4) The current range is wide. (from 0.5 A to 50 A) (5) Analog output for voltage, current, and active power is provided. (3φ3W) (6) Monitor output (waveform output) for voltage and current is provided.

(3φ3W)

(7) It is possible to measure the plus, minus, total current, power integrations,

and current integrations simultaneously. (8) The terminals for voltage and current measurements are insulated. (9) All measurement data has synchronism.

(10) By using the GP-IB Interface and the RS-232C Interface, it is possible to

print out this unit's controls an d data.

(11) This unit will convert either voltage, current, effective power, apparent

power, reactive power, power factor, phase angle, frequency, integration

value, and current peak value into ±5 V f.s. direct voltage and output from

the D/A output terminal.

(12) Small-sized and light weight (13) With the 50 A range, large currents can be accurately measured. (14) With two voltage inputs and two current inputs, all currents and voltages of

a three-phase line can be measured.

(15) The peak value of a current waveform is measured. (16) The delay time from an input to an analog output is about 0.2 seconds. (17) With the response setting at "SLOW" (about 1.6 seconds), stable

measurement is possible at 10 Hz and above.

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1.2 Features

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1.3 Principles of the Two-Power Method of Power

Measurement and V

Three-phase three-wire

power supply side

・

3 2

・

→I

The above figure shows a schematic circuit of a three-phase three-wire line. In the figure, V

・

,andI

・

,and

・

power (P) of a three-phase system is normally found as the sum of the powers of the three phases.

・

However, a three-phases three-wire system has no center point, and it is not possible directly to measure the power of each phase; moreover, even given a center point, three power meters are required simultaneously. For these reasons, usually the two-power method (two voltages, two currents) is used, measuring inter-line voltages. This can be derived by the following expressions. Measuring V

・

P=V

・

Since here expressions (1) and (2) are the same, it follo ws that the threephase power can be measured by the two-power method. This requires no special conditions, other than that the circuit is closed (that is, there are no leakage currents), and can therefore be used to find the threephase power whether the circuit is balanced or unbalanced. This unit uses the two-power method of power measurement. Additionally, since the voltage and current vectors each sum to zero, and therefore the following are obtained by the internal circuit:

・

|=|V

・

|=|-I

Thus yielding the third voltage and current values. Again, V3and I2can be measured regardless of whether or not there is distortion present.

・

Schematic circuit of a three-phase three-wire line

・

are vectors representing the (phase) line currents, and

are vectors representing the voltage of each of the phases. The

・

-V

・

-I

and I3Measurement

・

→I

・

Center

・

,andV

・

,andI

・

(-I

・

-I

・

→

are vectors representing the inter-line voltages,

・

with power meters, the following holds:

・

)

・

,V1=

・

(with closed circuit I

Three-phase three-wir load side

・

(1)

・

=0)

・

(2)

NOTE

Since with this unit I3is input to channel 2, on the display the current value shown for channel 2 is I3, and the current value shown for channel 3 is I2.

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1.3 Principles of the Two-Power Method of Power Measurement and V3 and I3 Measurement

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1.4 Identification of Controls and Indicators

Channels Display a Display c Display b Display d

Handle

Power switch

Stand

Channel 1 input

Connection mode

Response speed

Rectifier type

Voltage range

Current range

Condition of integration, hold, settings

Front Panel

Current input terminal Voltage input terminal Connector for external control and output

RS-232C interface

Channel 2 input

GP-IB interface

AC inlet (Power supply connector)

Rear Panel

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1.4 Identification of Controls and Indicators

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1.5 Explanation for Keys

Key

MODE FUNC

RESPONSE

AVE･FREQ

FUNC

PT･CT

FUNC

▲

FUNC

▼

D/A

INTEG

ENTER

INTERFACE RECTIFIER

DATA OUT

HELP

START/STOP

RESET

LOCAL

KEY LOCK

To get the lower key indications, press the

Notation

in this manual

CHa

MODE

FUNCa

RESPONSE

CHb

AVE･FREQ

FUNCb

PT･CT

CHc

FUNCc

CHd

▲

FUNCd

▼

D/A

INTEG

ENTER

INTERFACE

RECTIFIER

DATA OUT

HELP

START/STOP

RESET LOCAL

KEY LOCK

Changes the display channel on the display a. Enter the connecting mode (1φ/3φ).

Changes the display item on the display a. Switches the response speed (FAST/SLOW).

Changes the display channel on the display b. Sets the averaging count and frequency.

Changes the display item on the display b. Sets the PT and CT ratios. Changes the display channel on the display c.

Moves the cursor to the left. Changes the display item on the display c.

Moves the cursor to the right. Changes the display channel on the display d.

Increases the setting value. Changes the display item on the display d.

Decreases the setting value. Decreases the voltage range.

Sets the D/A output item. Increase the voltage range.

Sets the integration time. Decreases the current range.

Enter the setting value. Increases the current range.

Sets the GP-IB and RS-232C. Switches the rectifier type (RMS/MEAN)

Sets the printer interval and output item. Outputs the measured value on the printer.

Outputs the setting values on the printer. Stops or starts the integration operation.

Resets the integration value. Releases the remote state via interface.

Sets the key lock state.

Operations Section

SHIFT

key first.

3.4

3.1

3.4

3.2

3.4

4.4, 4.5

3.4

4.7

3.4 4

3.5

4.6

3.5

4.3

3.5 4

3.5

4.9

3.3

4.8

8.2, 8.7

4.3.3

8.2

6.5

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1.5 Explanation for Keys

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HOLD

PEAK HOLD

SHIFT

HOLD

PEAK HOLD

SHIFT

Holds the display value. Holds the peak value and maximum value.

Validates the lower indicated function key. (indicator is lit)

3.6

2to6

Key operations during self-test when powering on SHIFT → RESET: system reset is performed after self-test SHIFT → ENTER: enter mode for changing the clock frequency of power

calculation circuit after self-test.

①→②:Press① and then ② in order.

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1.5 Explanation for Keys

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1.6 Display Reference

Indications Meaning

Numbers

1, 2, 3, SUM

m, k, M V, A, W, VA, var, PF, ○,

Ip, Hz, Ah, +Wh, -Wh ±Wh, TIME

1φ,3φ

AUTO, FAST, SLOW

RMS, MEAN

AUTO, 150, 300, 600

AUTO, 0.5, ....50

RUN

SC AV

Measurement value Indicates channel displayed. Indicates the prefix of unit. Indicates the unit and display item.

Voltage, current, active power, apparent power, reactive power, power factor, phase angle, current peak frequency, integration power, positive integration power, negative integration power, total integration power, integration elapsed time

Indicates connecting mode. Indicates response time. Indicates the rectifier type (RMS: true rms value, MEAN: average

rectifier effectiveness value conversion) Indicates the voltage range (AUTO: auto-ranging on) Indicates the current range (AUTO: auto-ranging on) Indicator is lit during integration operating, flashes when it stops, goes

off when it is reset. Indicator is lit when the PT ratio or CT ratio is other than 1. Indicator is lit excluding when the number of times of averaging are set

to OFF (1)

HOLD KEY LOCK SHIFT RMT PRINT

(left side of display c)

OVER o.r V, A, W (

Wh, Ah (

S.Err

----

flashing) Indicates that there was the value which is out of range during

Indicates HOLD status. The indicator is flashing in the peak hold. Indicates key lock status. Indicates SHIFT status The unit is in remote control state. Indicator is lit when the interface is in printer mode, or when GP-IB is

communicating and outputting data. When displaying Hz, indicates on the left side of display c.

"_": 50 kHz range, "_": 500 Hz range Indicates the input's peak value has exceeded the range by 6 times. Indicates the value exceeds the display range. (o.r) = out of range

averaging.

integration. Indicates the PT or CT ratio was set so that the scaling result exceeds

99999M at 130% f.s. input. (scaling error) Indicates the invalid data because of changing frequency.

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1.6 Display Reference

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Setting

Meaning

indications

Average setting (number of times of average) Frequency setting (source, range) D/A output setting (item) Integration time setting Print out setting (time interval of prin ting, print item) PT (voltage transformer) ratio setting CT (current transformer) ratio setting GP-IB (address, control mode) setting RS-232C setting (baud rate, data length, parity, stop bit, control mode) Power computation circuit clock setting

Error indications Meaning

Backup error (press any key to deactivate, needs repair) ROM malfunction (cannot deactivate, needs repair) RAM malfunction (cannot deactivate, needs repair) RAM display malfunction (cannot deactivate, needs repair) Timer malfunction (cannot deactivate, needs repair) A/D,D/A converter malfunction (cannot deactivate, needs repair) Mix up of control by key and remote during integration (displayed

approx. 1 second) A non-executable key was pressed during integration (RUN indicator

lit/flashing) (displayed approx. 1 second) Integration was started while S. Err was displayed (displayed approx. 1

second) Integration was started when it was ±999999M (displayed approx. 1

second) Data was reset during integration (displayed approx. 1 second) A invalid key was pressed during HOLD (HOLD indicator lit/flashing)

(displayed approx. 1 second) A invalid key was pressed during display settings (displayed approx. 1

second) Key was pressed when the printer mode is not set for the interface

(displayed approx. 1 second) There is no room in the printer output memory (displayed approx. 1

second) The interface cannot be communicated. A CH key was pressed when the channel cannot be changed because of

the connection mode (displayed approx. 1 second) Example: Attempting to display W1 in three-phase mode.

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1.6 Display Reference

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Other indications Meaning

Item is valid in single-phase connection mode. (Setting) Item is valid in three-phase connection mode. (Setting)

・

Item is valid in single-phase, three-phase connection mode. (Setting) This item is not set. (Setting) In integration time setting, this indicates operation under external control. Data is sent to printer after recovery from power failure. Resets the 3331

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1.6 Display Reference

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1.7 Handle and Stand Operations

Removing the handle and stand

Screws

If the handle or feet are not required when the unit is rack-mounted, remove the fixing screws as shown in the figure on the left.

1. Remove the screws fixing on the handle.

Stand

Handle

Right side view

2. Remove the screws on the four feet (two feet with stands)

Screws

CAUTION

Handle

NOTE

Carefully store remove d handles, feet, and screws for use in locations other than the rack.

For the making rack mounting fittings, see Chapter 10, "Rack Mounting."

Be sure not to bear down too hard on the top of the unit when it is tilted upwards. Doing so may damage the stand.

Stand operation

The stands move in the direction indicated by the arrow. When raising or closing the stands, move them to where you hear them click into place.

NOTE

When raising the stands, be sure to raise both the left and right stand together.

Stand

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1.7 Handle and Stand Operations

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Chapter 2

Preparation for Measurement

2.1 Before Measurement

DANGE R

WARNING

Do not exceed the maximum input voltage and current. Doing so

can damage the unit or cause a serious accident.

The maximum rated voltage between input terminals and ground is

600 Vrms. Attempting to measure voltages exceeding 600 Vrms with respect to ground could damage the instrument and result in personal injury.

Always connect the powermeter input to the secondary side of the

To avoid electric shock accidents, do not touch the input terminals

of the unit on live lines, which is exposed.

In order to prevent electric shock and short-circuit accidents, shut

off the power to the line to be measured before connecting the

direct connection voltage and current cables to the terminals.

Be sure to connect the voltage input terminals or current input terminals

correctly. Measurement which is attempted with the wiring connected incorrectly may cause damage to the unit or a short-circuit.

If an attempt is made to use an improper supply voltage, there is

danger of damage to this unit and of life-threatening risk to the operator.

Before turning on the power, make sure that the voltage of the power

supply being used matches the supply voltage indicated on the rear panel of the unit.

The unit is constructed so as to be connected to a ground line via a

three-core power cord that is supplied with the unit. In order to

avoid electric shock, connect the unit to a properly grounded (3-pin)

outlet using the power cord provided.

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2.1 Before Measurement

Page 26

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WARNING

CAUTION

When using an external current transformer, do not leave the secondary side open-circuit. If a current flows through the primary while the secondary is open-circuit, this can generate a high voltage on the secondary, which is extremely dangerous.

・ To avoid electric shock, the wiring which is used for making the

connections to the current input terminals should have sufficient current carrying capacity and insulation.

・ This unit is designed for indoor use and can be safely used at

temperatures ranging from 0℃ to 40℃.

・ Do not store or use the unit where it will be exposed to direct sunlight,

high temperatures, high humidity, or condensation. If exposed to such conditions, the unit may be damaged, the insulation may deteriorate, and the unit may no longer satisfy its specifications.

・ This unit is not constructed to be waterproof or dustproof, so do not

use it in a very dusty environment or in one where it will get wet.

・ Do not use the unit near any device which generates strong

electromagnetic radiation or near a static electrical charge, as these may cause errors.

・ To prevent electric shock, do not allow the unit to become wet and do

not use the unit when your hands are wet.

NOTE

･ This unit uses the two-power method for measuring a three-phase line. For

this reason, if there is a leakage current from the line being measured, or in a four-wire three-phase system, accurate measurement is not possible.

･ This unit is electrically configured specifically for AC currents. Thus signals

with elements of DC currents (such as all-wave rectifier) cannot be measured.

･ Because the polarity of the voltage and current will affect electrical

measurement, be sure the wiring is connected correctly.

･ If the voltage and current of the device being measured exceeds the

measurement range of this unit, please use an outside-connected PT, or CT. The measurement value can be directly read if the scaling function is used.

･ When using an outside connected trans (PT, CT), the phase differences of

those may cause differences in the electrical measurement. If a precise electrical measurement is necessary, use a PT or CT that has only a small phase difference from the wiring's wave length area that is to be used.

･ Make sure that the wiring of the electric wires are separated from this unit,

so that there is no effect on this unit from an outside magnetic field.

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2.1 Before Measurement

Page 27

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2.2 Simple Use

Check that the line to be measured is shut off, and

測定対象のラインが遮断されていることを確認、およ

check that this unit is powered off and the power

び本器の電源が OFF され電源コードを抜いてあること

Connect the power cord of the 3331 to the outlet.

cord disconnected from the outlet.

Check that there is no short circuit.

Turn the 3331 power on.

を確認する

Make a connections.

Reference

Section 2.3, "Making the Connections"

Section 2.4, "Powering On "

Set the connection mode.

Set the display item.

Set the measurement range.

Set the each items.

Check the connection of line being measured again,

and turn on the power line.

Section 3.1, "Selecting the Connection Mode "

Section 3.4, "Selecting the Display "

Section 3.5, "Selecting the Range"

Chapter 3, 4

(Warming-up for more than 30 minutes)

Start the measurement.

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2.2 Simple Use

Page 28

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2.3 Making the Connections

2.3.1 Direct Connections

DANGE R

WARNING

Always connect the power meter to the secondary side of a breaker. On the secondary side of a breaker, even if the lines are shorted the breaker can trip and prevent an accident. On the primary side, however, the current capacity may be large, and in the event of a short-circuit there may be a serious accident. Shut off the line power supply before connecting the voltage cable and current cable. If the voltage cables should be detached and touch the two wires, a shorting accident or electric shock may result. The maximum input voltage and current are 600 VAC, 60 A. Do not measure an input in excess of these limits, as the resulting heat buildup may damage the unit or cause a short-circuit accident. Once the connections are made, do not touch the input terminals of the voltage and current transformers. There are exposed live parts, and a danger of electric shock or serious accident. Check that the terminals are tightened securely. If the connections should become detached, there is a danger of a short-circuit or electric shock accident. Additionally, if the connections are not properly tightened, the contact resistance increases, which may lead to the generation of heat, or fire.

In order to prevent electric shock and short-circuit accidents, shut off the power to the line to be measured before connecting the direct connection voltage and current cables to the terminals. Be sure to connect the voltage input terminals or current input terminals correctly. Measurement which is attempted with the wiring connected incorrectly may cause damage to the unit or a shortcircuit. Do not short circuit between voltage input terminals, when making a connection. If not, a shorting accident or electric shock may result. To prevent accidental electrocution or short-circuits, make connections to the voltage and current input terminals using only insulated wire that is terminated with pressure-fitted terminals. (The voltage and current input terminals have an M6 axial diameter.) Before switching on power for the line to be measured, check that the connections and the wiring are not shorting between the voltage input terminals. If there is a short circuit, a electrical shock and or short circuit accident will occur.

CAUTION

To avoid electric shock, the wiring which is used for making the connections to the current input terminals should have sufficient current carrying capacity and insulation.

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2.3 Making the Connections

Page 29

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single-phase three-wire or three-phase three-wire

Power supply side

Channel 1

Channel 2

Equivalent circuit

Load side

Channel 1

Channel 2

single-phase two-wire

Power supply side

Ａ

NOTE

･ Depending on the input level, power meter losses may affect measured

values. Refer to Section 2.3.3 for how to make connections that minimize power meter losses.

･ If the instrument is affected by common mode voltage, connect an

ammeter as shown as B to reduce the error.

･ When measuring a single-phase two-wire system, set the wiring connection

mode to 1φ. (Refer to Section 3.1 "Selecting the Connection Mode".) However, all settings, such as the range, PT, and CT, of the CH1 and CH2 are common.

Load side

Power supply side

Ｂ

3331 input terminals (Channel 1 or

Channel 2)

Load side

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2.3 Making the Connections

Page 30

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2.3.2 When Using PT or CT

DANGE R

WARNING

Once the connections are made, do not touch the input terminals of the voltage and current transformers. There are exposed live parts, and a danger of electric shock or serious accident. Check that the terminals are tightened securely. If the connections should become detached, there is a danger of a short-circuit or electric shock accident. Additionally, if the connections are not properly tightened, the contact resistance increases, which may lead to the generation of heat, or fire.

When using an external voltage transformer, do not leave the secondary side short-circuited. If a voltage is applied to the primary while the secondary is short-circuited, a high current will flow through the secondary, which could lead to fire or malfunction. When using an external current transformer, do not leave the secondary side open-circuit. If a current flows through the primary while the secondary is open-circuit, this can generate a high voltage on the secondary, which is extremely dangerous. Before switching on power for the line to be measured, check that the connections and the wiring are not shorting between the voltage input terminals. If there is a short circuit, a electrical shock and or short circuit accident will occur. To prevent accidental electrocution or short-circuits, make connections to the voltage and current input terminals using only insulated wire that is terminated with pressure-fitted terminals. (The voltage and current input terminals have an M6 axial diameter.)

CAUTION

NOTE

Power supply side

To avoid electric shock, the wiring which is used for making the connections to the current input terminals should have sufficient current carrying capacity and insulation.

･ By setting the PT ratio and the CT ratio, it is possible to directly read the

first side of the PT and CT. For details, refer to Section 4.7, "Setting the PT and CT Ratios."

･ The secondary side of the PT or CT must be grounded for safely. (Since

most previously attached PT and CT's are already grounded, please check before grounding.)

･ When using an outside connected trans (PT,CT), the phase differences of

･ Depending on the input level, power meter losses may affect measured

values. Refer to Section 2.3.3 for how to make connections that minimize power meter losses.

Load side

Channel 1

Channel 2

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2.3 Making the Connections

Page 31

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2.3.3 Notes on Connection Methods

The power meter can be connected either using the method shown below in Fig.1, with the voltage measurement terminal connected on the load side, or as shown in Fig.2, with the current measurement terminal connected on the load side.

As shown in Fig.1, when the voltage measurement terminal is connected on

the load side, the power measurement includes a loss due to the inclusion of the voltage measurement input resistance.

Input resistance on the current side

2mΩ

Power

Input resistance on the voltage side

Fig.1 Voltage Measurement Terminal Connected on the Load Side

On the other hand, as shown in Fig 2, when the current measurement terminal is connected on the load side, the power measurement includes a loss due to the inclusion of the current measurement input resistance.

Input resistance on the current side

2MΩ

2mΩ

Load

Power

Input resistance on the voltage side

2MΩ

2mΩ

Input resistance on the current side

Input resistance on the voltage side

Load

2MΩ

Input resistance on the voltage side

Fig.2 Current Measurement Terminal Connected on the Load Side

The method of connection should be shown so as to minimize the loss; which connection is better depends on the relative magnitude of the current and voltage. For example, measuring 600 V, 20 A supply:

Fig.1 loss = (600 [V])2÷ 2[MΩ] = 0.18 [VA] Fig.2 loss = (20 [A])2× 2[mΩ] = 0.8 [VA] In this case, therefore, the connection shown in Fig.1 should be used.

Next consider the case of measuring 600 V, 1 A system: Fig.1 loss = (600 [V])2÷ 2[MΩ] = 0.18 [VA]

Fig.2 loss = (1 [A])2×2[mΩ] = 0.002 [VA] In this case, the connection shown in Fig 2 allows more accurate

measurement.

Load

PowerPower

Input resistance on the current side

2MΩ

2mΩ

Load

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2.3 Making the Connections

Page 32

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2.4 Powering On

WARNING

CAUTION

Before turning on the power, make sure that the voltage of the power supply being used matches the supply voltage indicated on the AC power inlet of the unit.

If an attempt is made to use an improper supply voltage, there is danger of damage to this unit and of life-threatening risk to the operator.

The unit is constructed so as to be connected to a ground line via a three-core power cord that is supplied with the unit.

The power switch has a microgap construction, and it is therefore essential to use it close to a power outlet. When the unit is not in use, and while making connections to the circuit being tested, isolate the unit electrically from the power supply, for example by removing the power cord plug from the outlet.

･ When the power is turned off, do not apply voltage or current to the

voltage input terminals and the current input terminals. Doing so may damage the unit.

･ Should the unit emit smoke, or a strange smell or strange sound,

NOTE

Before measuring, please perform a warm-up at least for 30 minutes after the power is turned on.

1. Make sure that the voltage of the power supply being used matches the supply voltage indicated on the rear panel. (power supply voltage 100 V to 240 V)

2. Confirm the power switch on the front panel is OFF.

3. Connect the power cord supplied to AC inlet on the rear panel.

4. Plug the power cord into a properly grounded (3-pin) outlet that has a safety grounded terminal.

5. Turn the power switch on.

6. All Indicators on the front panel are displayed and the self testing start. Refer to Section 2.5, "Self Test" for details. This test ends about for 10 seconds.

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2.4 Powering On

Page 33

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2.5 Self Test

Indications in self test shifts as follows:

(1) All indicators illuminate (2) Displays

a: Model b: Software version number

(3) Setting conditions of the GP-IB address and RS-232C

NOTE

(4) After self checking, error number is displayed if an unusual matter is

founded.

(5) Returns to normal measurement state.

･ For the error indications, refer to Section 6.3, "Error Indications." ･ Settings at powering on become previous condition. (Backup function)

However, this function does not work when internal lithium battery is used up. In this case, the error is indicated after self-test.

･ The battery would run down after six years. Please contact your nearest

service representative for battery change.

･ Don't press the keys unnecessarily during self testing. ･ If the

SHIFT

key is pressed and then the

RESET

key is pressed during the self-test, the unit will reset the system. (Refer to Section 6.2, "System Resetting.")

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2.5 Self Test

Page 34

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2.5 Self Test

Page 35

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Chapter 3

3.1 Selecting the Connection Mode

Depending on the type of line, set the connection mode to 1φ (single-phase) or 3φ (three-phase three-wire). This affects the method of calculation and the display items.

Basic Operation

NOTE

Pressing the

･ The display item can be changed in connecting mode. ･ If the display does not support the changed connection mode, forcibly

change the display channel.

･ During integrating (the RUN indicator is lit or flashing), the connecting mode

cannot be changed ("Err.012").

･ After stopping integration by pressing the START/STOP key, press the SHIFT

→

RESET

can be changed.

･ During holding displays or peak value (the HOLD indicator is lit or flashing),

the connecting mode cannot be changed ("Err 016"). Press the

SHIFT→HOLD

change the mode.

･ When the mode is changed, read the measurement value after the condition

of internal circuit is stable (for 5 seconds or more).

･ When measuring a single-phase two-wire system, set the wiring connection

mode to 1φ. The power values for each channel can be displayed. However, all settings, such as the range, PT, and CT, of the CH1 and CH2 are common.

SHIFT→MODE

key to reset the integration (the RUN indicator goes off). The mode

keys to release the hold state (the HOLD indicator goes off) to

key switches mode; 1φ3W and 3φ3W.

HOLD

key or

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3.1 Selecting the Connection Mode

Page 36

────────────────────────────────────────────────────

NOTE

Display item

Channels

1φ 3φ Voltage V

Current A Active power W

Apparent power VA Reactive power var

Power factor PF Phase angle

Current peak Ip Frequency Hz

Integration current Ah Integration power

1, 2 1, 2, 3, SUM

1, 2 1, 2 3, SUM

1, 2, SUM SUM

○

1, 2 1, 2, 3

1, 2 1, 2

1, 2 1, 2, 3

1, 2, SUM SUM

+Wh/-Wh/±Wh

･ In three-phase mode, the active power values for each channel are derived

from the inter-line voltages and line currents, and have no independent significance as results. For this reason, some items are not shown for all channels.

･ For a single-phase three-wire connection, channel 3 goes out of range when

the channel 1 and channel 2 inputs are 65% f.s. Since an out-of-range input affects other measurement values, this unit cannot perform measurement on channel 3 in the single-phase mode.

･ In the single-phase three-wire mode, the U3 and I3 analog outputs and

monitor outputs are always 0 V.

･ The SUM values for voltage and current show average values for channels 1,

2, and 3. For other items, the SUM values are the overall totals for one or three phases.

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3.1 Selecting the Connection Mode

Page 37

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3.2 Changing the Response Setting

To enable stable measurements in the low frequency range, there are two

response settings available.

FAST (response time: about 0.2 seconds) This allows stable measurement for a constant input of at least 45 Hz, but at frequencies below 45 Hz the measured value fluctuates. When power transients or fluctuations occur, they are followed.

SLOW (response time: about 1.6 seconds)

This allow s stable measurement down to 10 Hz, but sudden fluctuations cannot be followed.

Pressing the SHIFT→RESPONSE keys changes display as follows.

AUTO FAST SLOW

With the AUTO selection, the FAST response is used when the frequency is 45 Hz or above, and the SLOW response otherwise. When the frequency indication is "o.r" or "-----", the previous response setting is maintained.

NOTE

It is not possible to change the response setting in the display hold or peak hold mode (with the HOLD indicator lit or flashed, "Err.016" is displayed). Press the HOLD indicator goes off), to make a change possible. However, with the AUTO selection, the measurement is continued switching the response setting, even if in the display hold mode.

HOLD

key or

SHIFT→HOLD

keys to end the hold mode (so that the

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3.2 Changing the Response Setting

Page 38

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3.3 Selecting the Rectifier Type

(1) For voltage measurement this unit has two rectifier circuits. Before

measurement, select the following type.

① RMS Measure true RMS value ② MEAN Measure average rectifier effective value converted for voltage,

true RMS value for current

(2) The rectifier type selected displays on rectifier display.

NOTE

(3) Pressing the

RECTIFIER

key changes the rectifier type.

Select suitable rectifier type repeating these operation.

RMS MEAN

･ For sine wave less than 200 Hz, both "average rectifier effective value

converted (MEAN)" and "real effective value (RMS)" indicate correct effective value. How ever, only "real effective value" indicates correct value for the input which include distorted wave.

･ With the MEAN setting, a 500 Hz filter is automatically applied to the

voltage measurement. This filter eliminates the carrier frequency of an inverter, allowing measurement close to the fundamental frequency. The power computation circuit, however, uses the input as is, so that there is no difference between MEAN and RMS. Moreover, for MEAN, the accuracy is not specified at frequencies of 200 Hz and above.

･ During integrating (with RUN lit or flashed), the rectifier type cannot be

changed ("Err.012"). Before changing the rectifier type, press the RESET key to reset the integration (RUN goes off).

･ During holding the displays (with HOLD lit or flashed), the rectifier type

cannot be changed ("Err.016"). Before changing the rectifier type, press the

HOLD

key to release the hold state (HOLD goes off).

･ When the rectifier type is changed, read the measurement value after the

condition of internal circuit is stable (for 5 seconds or more).

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3.3 Selecting the Rectifier Type

Page 39

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3.4 Selecting the Display

Display a

123SUMlPPFTIME

key Selects channel (1, 2, 3, SUM)

CH FUNC

key Selects function (V, A, W, VA...)

Displays Function

V, A, W, VA, va r, PF, ○,Ip,TIME

V, A, W, VA, va r, PF, ○,Ip,Ah,±Wh

V, A, W, VA, va r, PF, ○,Ip,Ah,+Wh

V, A, W, VA, va r, PF, ○,Ip,Hz,Ah,+Wh,-Wh,±Wh

FUNC

V AVA W var

NOTE

Voltage

Current

Active power

Apparent power

Reactive power

var

Power factor

Phase angle

○

Current peak frequency

Hz Frequency Ah Integration power +Wh Positive integration power

-Wh Negative integration power ±Wh Total integration power TIME Integration elapsed time

Example of key operation

When displaying integration elapsed time on display a, SUM of active power on display b, positive integration power on display c, SUM of apparent power on display d:

FUNC

1. Press

2. Press

3. Press

4. Press

5. Press

6. Press

7. Press

The channels to be displayed vary depending on the function, therefore the data for channel in each function are saved. Before changing the channel, set the function to change the display.

to light "TIME" on display a.

FUNC CH FUNC CH FUNC CH

to light "W" on display b.

to light "SUM" on display b.

to light "+Wh" on display c.

to light "SUM" on display c.

to light "VA" on display d.

to light "SUM" on display d.

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3.4 Selecting the Display

Page 40

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The channels to be displayed in connecting mode are as follows.

Channels

Display item Voltage V

1φ3W 3φ3W

1, 2 1, 2, 3, SUM

Display item Phase angle

Channels

○

1φ3W 3φ3W

1, 2, SUM SUM

Current A

Active power W Apparent power VA

Reactive power var Power factor PF

1, 2 1, 2 3, SUM

1, 2, SUM SUM

･ If the

CH key is pressed when the item which the channel cannot be changed

is displayed, for example; W and VA in 3φmode), "Err.CH" is displayed on the display corresponding to the key（for a second）

･ Changing the frequency channel (Hz) changes automatically setting of

frequency source.

･ Changing the item saves measurement items of frequency. ･ The voltage, current, and effective power channels display up to 130% of

range. Values in excess of that amount will result in display of "o.r.", indicating out of range. The display will show o.r. for the results of calculations made using data that is out of range.

･ In three-phase mode, the active power values for each channel are derived

from the inter-line voltages and line currents, and have no independent significance as results. For this reason, some items are not shown for all channels.

Current peak Ip

Frequency Hz Integration current Ah

Integration power Integration elapsed TIME

+Wh/-Wh/±Wh

1, 2 1, 2, 3

1, 2 1, 2

1, 2 1, 2, 3

1, 2, SUM SUM

── ──

NOTE

When "TIME" is selected on display a, the following integration elapsed time is displayed.

From0minuteto 999 hours and 59 minutes

From 1000 hours to 9999 hours and 59 minutes

1000 hours

For the frequency display, the frequency measurement range is displayed as follows;

500 Hz range 50 kHz range

･ Under setting condition, constants or condition is displayed on the display. ･ If the electrical current phase is leading compared to the voltage phase, the

displays for reactive power, power factor, and phase angle will show a "-" for polarity.

･ If the frequency item or range is changed, "-----" appears until the

measurement is completed.

･ If the frequency measurement channel is changed by using the

key in the hold state (HOLD indicator lit or flashing), the data is held after frequency measurement once.

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3.4 Selecting the Display

Page 41

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3.5 Selecting the Range

DANGE R

The maximum input voltage and current are 600 Vrms, 60 Arms. If the display value exceeds 600 V or 60 A, immediately stop measurement, cut the power to the line being measured. If measurement is continued exceeding the maximum input , the unit will be damaged and cause a serious accident.

NOTE

(1) Setting limits

Voltage range: 150/300/600 V Current range: 0.5/1/2/5/10/20/50 A Active power , reactive power and apparent power ranges: combination with voltage and current range. See Section 11.2 Current peak range: six times of current range Active input limit (accuracy assuring limit) : 1% to 120% for range. (1% to 100% only in 600 V range) (for current peak value, 1% to 100% for range or 90 A peak value) Indication limit: 130% for range (for voltage, current, active power), 110 % for range (for current peak) In case of over this limit, followi ng mark is displayed (this means out of range).

･ During integration (the RUN indicator is lit or flashing), the range cannot be

changed ("Err.012" is displayed). Before changing the range, press the

RESET key to reset the integration value (the RUN indicator goes off).

･ During holding the displays (the HOLD indicator is lit or flashed) the range

cannot be changed ("Err.016" is displayed). Before changing the range, pressing the HOLD key or HOLD indicator goes off).

SHIFT→HOLD

keys to release the hold state (the

(2) Settings

Voltage range [V]

Range up

AUTO 150 300 600

Current range [A]

AUTO 0.5 1 2 5 10 20 50

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INTEG

Range down

D/A

Range up

INTERFACE

Range down

ENTER

3.5 Selecting the Range

Page 42

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(3) Auto-ranging function

"AUTO" means auto-ranging function. Shift level for auto-ranging function shows as follows;

① When the measured value for any channel exceeds 110% for range: range up ② When "OVER" illuminates: range up ③ When the measured value for all channels is less than full scale of 30%:

range down To release auto-ranging function, press the or key once.

NOTE

･ For single-phase, the decision is made for channels 1 and 2. For three-phase,

the decision is made for channels 1, 2, and 3.

･ In auto-ranging function sometimes range goes on up and down according to

distortion of input wave or size of measuring value. In this case, release auto-ranging function and select range manually.

･ The OVER indicator is lit when peak value of voltage input and current input

waveform are over six times for range. In this case, internal circuit works abnormally. Select the range not to lit the OVER indicator.

･ Even if it is either voltage or current, when massive input that will display

out of range (o.r.) is applied, sometimes other measuring values become abnormal. Be sure to select ranges for voltage and/or current that will not be out of range or lit the OVER indicator.

･ Apparent power shows out of range (o.r) when either voltage or current

shows same display.

･ Reactive power, power factor and phase angle shows out of range (o.r.) when

either active power and apparent power shows same display.

･ Po wer factor and phase angle shows out of range (o.r.) when apparent power is

･ If the function's crest factor is exceeded (OVER is lit), the indicated data is

not correct.

･ After changing range, wait until the internal circuitry settles (5 seconds)

before reading the measurement value.

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Page 43

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3.6 Holding the Display

Press the HOLD key, the HOLD indicator is lit and preserve all measuring value at that point. (Hold state)

Press the HOLD key again, this indicator goes off, and return normal measuring condition.

3.6.1 Restrictions During the Hold Status

・Shifting of connecting mode, response, range and rectifier type are not

allowed. ("Err.016" is displayed.)

・Even if the auto-ranging is set for voltage, current, or frequency the range

cannot be changed. The range is fixed when the range is held. If the HOLD state is released, auto-ranging function restarts.

・The following settings cannot be changed, which are explained in Chapter 4,

"Settings and Operations". ("Err.017" is displayed.) Pressing the HOLD key to release the hold state (the HOLD indicator goes off)

changes setting.

Item Display

Selecting number of averaging

Selecting frequency measurement source and range

Selecting D/A output items

Selecting integrate time

Setting PT ratio

Setting CT ratio

NOTE

When the measurement channel of the frequency is changed by using the

key, the data is held after the frequency measurement is carried out

once.

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3.6 Holding the Display

Page 44

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3.6.2 Current Waveform Peak Hold Function and Maximum Value Measurement

These enable incoming current transients and maximum value of measurement items to be measured.

NOTE

(1) Press the

SHIFT→HOLD

keys to start the peak hold function. While the peak

hold function is activated the HOLD indicator flashes.

(2) Press the SHIFT→HOLD keys again to return to the normal display. (the HOLD

indicator goes off.)

(3) While the peak hold function is activated, pressing the

HOLD

key resets the

peak value to the present instantaneous value. (4) The peak value of the current waveform is shown as Ip. (5) While the peak hold function is activated, for other measurement items the

unit shows the maximum value since the peak hold function was activated.

Pressing the

HOLD

key also resets these maximum values to the present

instantaneous values.

･ The displayed peak value or maximum value is not necessarily measurements

at the same time.

･ For all items, the absolute values are compared. ･ When the averaging function is used, the maximum value is taken from the

averaged values, but the peak value is taken from the original values before

averaging.

･ Pressing the

SHIFT→HOLD

keys while the hold function is active (HOLD

indicator lit) switches to the peak hold function.

･ Power factor or phase angle "o.r" indications are treated as a power factor of

zero or phase angle of zero. (As minimum values) A frequency "o.r"

indication or "-----" indication is treated as a frequency of 0 Hz. (As

minimum value) For other items, an "o.r" indication is treated as a maximum

value.

･ The integration value is update during peak hold.

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3.6 Holding the Display

Page 45

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3.6.3 Restrictions During the Peak Hold Status

・Shifting of connecting mode, response, range and rectifier type are not

allowed. ("Err.016" is displayed.)

・Even if the auto-ranging is set for voltage, current, or frequency the range

cannot be changed. The range is fixed when the range is held. If the HOLD state is released, auto-ranging function restarts.

・The following settings cannot be changed. ("Err.017" is displayed.)

Press the SHIFT→PEAKHOLD key to release the hold state (the HOLD indicator goes off) the settings can be changed.

Item Display

Selecting number of averaging

Selecting frequency measurement source and range

Selecting D/A output items

NOTE

Selecting integrate time and items

Setting PT ratio

Setting CT ratio

When the measurement channel of the frequency is changed by using the

key, the data is held after the frequency measurement is carried out

once.

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3.6 Holding the Display

Page 46

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3.6 Holding the Display

Page 47

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Chapter 4

4.1 Setting Items

Items Key Display Section

Setting the integrate time Selecting the number of averaging AVE･FREQ 4.4

Selecting frequency measurement source and range

Selecting the D/A output items D/A 4.6 Setting the PT (voltage transformer) ratio PT･CT 4.7

Setting the CT (current transformer) ratio PT･CT 4.7 Selecting the printing interval time and

printing items for GP-IB listen only printer or RS-232C printer

Setting the GP-IB address INTERFACE Setting the RS-232C INTERFACE

Settings and Operations

INTEG 4.3

AVE･FREQ 4.5

PRINT 4.8

4.9

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4.1 Setting Items

Page 48

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4.2 Operating Setup Keys

"Setup key" means every key ( , , ▲ , ▼,andENTER) shown with blue

letters in the figure above. These keys work as "Setup key" when setting the

display (the SHIFT indicator is lit). While the SHIFT indicator is turned off,

this function does not work. However, those key work as the function

shown with black letters above them.

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4.3 Setting the Integration

This sets integration time. When integrating, some limitations arise for this unit. In this section, the settings and the integrating method will be explained.

4.3.1 Flowchart

Measurement display

SHIFT

INTEG

Integration setting display

Sets the integration

INTEG

Measurement display

1. Set the integration time.

2. Enter the settings.

4.3.2 Integration Setting Method

(1) Enter the integration setting state.

SHIFT

INTEG

NOTE

1. Press the SHIFT key and the SHIFT indicator is lit.

2. Press the INTEG key.

If there is no flashing indication displayed the settings cannot be changed (during HOLD or RUN indicator lit or flashing). In this case, return to the measurement state by pressing the integration value is reset or hold state is released.

To reset the integration, use the

indicator is flashing) and press when the RUN indicator is off).

To release the hold state, press the

lit,and press (HOLD state is released when the HOLD indicator is off).

SHIFT→PEAKHOLD

Integration time

Hours Minutes

INTEG

START/STOP

SHIFT→RESET

HOLD

when the HOLD indicator is flashing.

key, and set again after the

key to stop integration (RUN

. (Integration value is reset

key when the HOLD indicator is

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4.3 Setting the Integration

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(2) Set the integration.

Changing value

▲

Moving digits

▼

Supplement

Display:

ENTER

1. To select the integration time, press the ▲ or ▼

SETUP

key to change the value. Pressing or

SETUP

key moves flashing digit.

2. The setting range of integrate time is 1 minute to 10000 hours.

To set 10000 hours, set values to zero in all di gits (0000.00).

3. Press the ENTER key. The flashing will stop and the setting will be decided.

Unless this operation is done, the internal setting cannot be changed.

If the settings need to be changed again, press either the , , ▲, ▼

SETUP

keys and the flashing points will reappear.

(3) Move to the measurement display.

Press the INTEG key. The SHIFT indicator will turn off.

Other keys operations in Integration Setting mode (SHIFT indicator is lit):

Key Key operation

AVE･FREQ

PT･CT

D/A

INTERFACE

Moves to each setting screen.

*HELP

SHIFT

*: When the interface is in Pr mode, the data is output.

If not

"Err.021" is displayed for 1 second.

4.3.3 Integration Operation

(1) Understanding the integrating state.

Integration execution state: RUN indicator lit. Integration stopped state: RUN indicator flashing Integration reset state: RUN indicator off.

Sends the setting data to the printer. Displays "Err.017". (for 1 second)

(2) The limitations of this unit due to integration.

During integration execution state (RUN indicator lit) and when in integration stopped state (RUN indicator flashing), the connecting mode, voltage range, current range, rectifier type, PT ratio, and CT ratio cannot be changed. ("Err.012" or "Err.017" is displayed for a second.)

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4.3 Setting the Integration

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(3) Integration operation

・To start the integration after the previous integration value is reset:

Press the

START/STOP

・To add to the previous integration value.

Press the START/STOP key.

・To stop forcibly the operating integration:

Press the START/STOP key. The RUN indicator is flashing and the integration operation will stop.

・To reset the integration value:

Press the SHIFT→RESET key, and the RUN indicator is turned off. The integration value will be reset.

(4) Integration stop (RUN indicator flashing)

・Reaches integrating time. ・Press the START/STOP key while the RUN indicator is lit. (RUN indicator will

be flashing).

・When integrate time reaches 10000 hours. ・When integrate value reaches ±999999 MAh (MWh).

(5) Integration reset

Press the SHIFT→RESET key while the RUN indicator is flashing (RUN indicator will be turned off).

SHIFT→RESET key (RUN indicator off), and then press

key (RUN indicator is lit). The integration will start.

4.3.4 Notes on Integration

(1) When starting integration, auto range setting of voltage and current is

canceled and the range at starting point is fixed. It is necessary to set the range so that it will not be out of range during integrating. If the input of current or active power for channels exceeds 130% of range during integration, the value for the channel is integrated as input of 130%f.s.

The Ah or Wh unit indication flashes to indicate that an out-of-range value has occurred. This continues flashing until the integration value is reset.

Ah or Wh flashes

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4.3 Setting the Integration

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(2) The following settings cannot be changed during integration (RUN indicator

lit) or integration stop (RUN indicator flashing), (Err.012 is displayed).

indicator

Items

Connection mode

RUN

Lit Flashing

－－

Response Rectifier type

Voltage and current range Averaging time

Frequency range and source PT ratio, CT ratio

D/A output item Integration time

Print time and item Interface settings

●: changeable －: can not change

("Err.012" or "Err.017" is displayed for a second.)

● ●

－－

● ●

－－

● ●

－－

－ ●

When integrated by external control, the displays will be as follows and the setting cannot be changed.

To change the setting for the integration value reset, return the measurement display with the

INTEG

key and press the

SHIFT→RESET

key.

(3) While the RUN indicator for integration is lit, resetting is out of order

(Err.015 is displayed). Resetting must be done after stopping integration (interface and external control).

(4) On starting and stopping integration key operating (and :INTEG:STATE

START command of interface) and external control are unable to mix ("Err.011" is displayed).

(5) When using external control, the integrate time which is set according to

Section 4.3.2, "Integration Setting Method" is invalid. After all, integration stops in following cases.

① Stopped by external control signals. ② When the integrate time achieves 10000 hours. ③ When the integrate value achieves ±999999 MAh (MWh).

(6) During displaying "S. Err", integrating cannot start ("Err.013" is displayed).

In this case, change PT ratio and CT ratio. Refer to Section 4.7, "Setting the PT and CT Ratios".

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4.3 Setting the Integration

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(7) When the integrate value achieves ±999999 MAh (MWh) or when the

integrate time achieves 10000 hours, integrating cannot restart. ("Err.014" is displayed). In this case, press the indicator off)

(8) When the GP-IB setting is "Pr." (printer mode), and a GP-IB listen-only

printer is connected, at the same time that integration values start to be sent to the printer, measurement values can be printed at regular intervals. If, however, communications are lost because of any fault, "Err. 023" is displayed. Refer to Section 4.8, "Setting the Printer Output."

(9) When using the RS-232C interface, set the unit to printer mode and connect

RS-232C printer, measuring value are able to print according to every certain interval simultaneously as starting integration. Refer to Section 4.8, "Setting the Printer Output." If, however, communications are lost because of any fault, "Err. 023" is displayed.

(10) When doing system resetting, integrating is stopped and the equipment is

reset to initial condition. For system resetting refer to Section 6.2, "System Resetting."

(11) When the power is cut off during integrating, integration starts again after

returned. If the interface is Pr. (printer) mode, the data, integrate elapsed time, and comment "POWER FAILURE" are printed out.

SHIFT→RESET

keys to reset integrating data. (RUN

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4.3.5 Display Format of Integrating Value

The integration reset format is shown in Table 1 and 2. Digits of integrate value and integrate range format carry up or down simultaneously.

NOTE

The number of digits does not go below that when integration is reset.

Table 1 Constitution of Current Integration Range

Range [A] 500.0 m 1 2 5 10 20 50

Reset value [Ah]

000.000 m 0.00000 00.0000

Table 2 Constitution of Power Integration Range 　　　Unit: Wh

I [A]

U [V]

150 00.0000 000.000 000.000 000.000 0.00000 k 0.00000 k 0.00000 k

300 000.000 000.000 000.000 0.00000 k 0.00000 k 0.00000 k 0.00000 k

600 000.000 000.000 0.00000 k 0.00000 k 0.00000 k 00.0000 k 00.0000 k

500.0 m 1 2 5 10 20 50

Integration resetting value

Display format of current range and active power range applies to integrate value format under reset condition.

Range Display format

Integrating value

format

Reset value

NOTE

30 W 30.00 W 30.0000 Wh 00.0000 Wh

1.5 kW 1.500 kW 1.50000 kWh 0.00000 kWh

Also in scaling display format applies to integrating value format.

Range Display format

150 W×5(CT) 750.0 W 750.000 Wh 000.000 Wh

The W

range is double that of the nominally specified range for each

SUM

Integrating value

format

Reset value

channel. However, upon reset, the display format uses the same digits as W1 and W2.

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4.3 Setting the Integration

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4.4 Setting the Number of Averaging

When dealing with input that changes greatly, an average measurement value is displayed. This unit does measurement averaging by the number of settings.

4.4.1 Flowchart

Measurement display

SHIFT

AVE･FREQ

Average setting display

Sets the averaging

AVE･FREQ

Measurement display

4.4.2 Average Setting Method

(1) Enter the average setting state.

SHIFT

AVE･FREQ

1. Press the

2. Press the

Flashing

SHIFT

AVE･FREQ

key and the SHIFT indicator is lit.

key.

Average setting Frequency setting

1. Set the number of times for averaging.

2. Enter the settings.

NOTE

If there is no flashing indication displayed the settings cannot be changed (the HOLD indicator lit or flashing). In this case, return to the measurement state by the

SHIFT→PEAKHOLD

AVE･FREQ

key and release the HOLD state by the

HOLD

key or

key (the HOLD indicator off). Then set again from step

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4.4 Setting the Number of Averaging

Page 56

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(2) Set the number of times for averaging.

1. When the indication on display c is flashing, the setting of the number of times averaged can be changed the following way, by using the

SETUP

keys.

Increasing

▲

Decreasing

ENTER

Use the ▲ key.

OFF 8 16 32 64

▼

Use the ▼ key.

2. Press the ENTER key, and the flashing will stop and the setting will be decided.

Unless this operation is done, the internal setting cannot be changed.

At this time, if the averaging times are anything but OFF, the AV (average) indicator is lit.

To change the settings again, press the ,,▲,or▼ key and flashing indication appears.

(3) Move on to the measurement display.

Press the AVE･FREQ key and the SHIFT indicator will turn off.

NOTE

Supplement

Display:

Unit flashes

If the input of voltage, current or active power for channels exceeds 130% of range during averaging, the value for the channel is averaged and calculated as input of 130%f.s. At that time, "o.r" is displayed. While an averaged value which includes an out-of-range value is being displayed, the unit indication flashes to indicate this fact.

Other keys operations in Averaging Setting mode (SHIFT indicator is lit):

Key Key operation

PT･CT

D/A INTEG PRINT

INTERFACE

*HELP

SHIFT

*: When the interface is in Pr mode, the data is output. If

not

"Err.021" is displayed for 1 second.

Moves to each setting screen.

Sends the setting data to the printer. Displays "Err.017". (for 1 second)

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4.4 Setting the Number of Averaging

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4.5 Setting the Frequency

This sets the item to measure the frequency and the frequency range. Any frequency higher than the set range will be filtered out by an internal filter, so a stable frequency measurement can be made.

4.5.1 Flowchart

Measurement display

SHIFT

AVE･FREQ

Frequency setting display

Sets the frequency

AVE･FREQ

Measurement display

4.5.2 Frequency Setting Method

(1) Enter the frequency setting state.

SHIFT

AVE･FREQ

1. Press the

SHIFT

2. Press the AVE･FREQ key. The averaging count is flashing.

3. Press the

key and the SHIFT indicator is lit.

SETUP

key, and the frequency source is flashing.

1. Select the frequency source.

2. Select the range.

3. Enter the settings.

Frequency source (V or A flashes)

NOTE

If there is no flashing indication displayed the settings cannot be changed (during HOLD indicator lit or flashing). In this case, return to the measurement state by pressing the state by pressing the

HOLD

key or

AVE･FREQ

SHIFT→PEAKHOLD

key and release the HOLD

keys (the HOLD

indicator off). Then set again from step 1.

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4.5 Setting the Frequency

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(2) Set the frequency.

Setting frequency source and range

▲

Switching display

▼

ENTER

Supplement

Display:

1. To select the frequency source, press the ▲ or ▼ key while the indication

of V1, V2, A1, or A2 on display d is flashing.

2. To select the frequency range, press the

key and the setting display (500

Hz, 50 kHz, or AUTO) on display d flashes. Press the ▲ or ▼ key to set the range.

3. Pressing the or key moves flashing point.

4. Press the

ENTER

key, and the flashing will stop and the setting will be

decided.

Unless this operation is done, the internal setting cannot be changed.

If the settings need to be changed again, press either the , , ▲, ▼

SETUP

keys and the flashing points will reappear.

(3) Move onto the measurement display.

Press the

AVE･FREQ

key.

Other keys operations in Frequency Setting mode (SHIFT indicator is lit):

Key Key operation

NOTE

PT･CT

D/A INTEG PRINT

INTERFACE

*HELP

SHIFT

*: When the interface is in Pr mode, the data is output. If

not

"Err.021" is displayed for 1 second.

Moves to each setting screen.

Sends the setting data to the printer. Displays "Err.017". (for 1 second)

When the frequency range is set to "AUTO", and if the frequency exceeds 500 Hz, the range is set to 50 kHz, or if the frequency is less than 400 Hz, the range is set to 500 Hz. If the range is not decided, "-----Hz" is displayed.

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4.6 Setting the D/A Output

CAUTION

Select the D/A output item. This function will change one of the measurement items (voltage, current active power, apparent power, reactive power, power factor, phase angle, current peak, frequency, current integration value or voltage integration value) out of the measured value reached by the calculation expression, into analog waveform.

4.6.1 Flowchart

To avoid damage to this unit, do not shorten the D/A output terminal or input voltage.

Measurement display

SHIFT

D/A

D/A output setting display

Sets the D/A output

D/A

Measurement display

4.6.2 D/A Output Setting Method

(1) Enter the D/A output setting state.

SHIFT

D/A

NOTE

1. Press the SHIFT key and the SHIFT indicator is lit.

2. Press the

D/A

key.

If there is no flashing indication displayed the settings cannot be changed. In this case, return to the measurement state by the HOLD state by the

HOLD

key or

from step 1.

1. Select the output item.

2. Enter the settings.

Setting item

Channel flashes Effective connection mode

key and release the

D/A

SHIFT→PEAKHOLD

keys. Then set again

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4.6 Setting the D/A Output

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(2) Set the D/A output.

1. If the channel number on display d is flashing set channel 1 to SUM.

2. The measured data output from D/A is displayed as unit symbols on display d. When the indication on display d is flashing, the units can be changed the following way, by using the

SETUP

keys.

▲

▼

ENTER

Supplement

Display:

V A W VA var PF

lp Hz Ah +Wh -Wh ±Wh

○

3. Using the and keys switches the items and channel.

4. Press the ENTER key, and the flashing will stop and the setting will be decided.

Unless this operation is done, the internal setting cannot be changed.

If the settings need to be changed again, press either the , , ▲, ▼ keys and the flashing points will reappear.

(3) Move onto the measurement display.

Press the D/A key.

Other keys operations in Averaging Setting mode (SHIFT indicator is lit):

Key Key operation

AVE･FREQ

PT･CT

INTEG PRINT

INTERFACE

Moves to each setting screen.

*HELP

SHIFT

*: When the interface is in Pr mode, the data is output. If

not

"Err.021" is displayed for 1 second.

For D/A output example, refer to Figure 1 to 6.

100%f.s.

Voltage, Current, Apparentpower, Currentpeak

Figure 1 D/A Output of Apparent Power

Sends the setting data to the printer. Displays "Err.017". (for 1 second)

-100 % f.s. 0 100%f.s.

Active power, Reactive power

Figure 2 D/A Output of Reactive Power

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4.6 Setting the D/A Output

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-0 -0.5 1 +0.5 +0

Power factor

Figure 3 D/A Output of Power Factor

2.5V

-180° +180°

LEAD LAG

0°

Phase an

Figure 4 D/A Output of Phase Angle

Lower than 0.8% f.s. becomes out of range. (Approx. 6.5 V) ･ In 500 Hz range, 500 Hz is 100% ･ In 50 kHz range, 50 kHz is 100% ･ During "-----Hz" display, the output of the

previous display is maintained.

0%f.s.

50%f.s.

Fre

uenc

Figure 5 D/A Output of Frequency

100%fs.

Figure 6 D/A Output of Integration (Example for active power integration)

(1) When t he inte grated value equals a multiple of "the m easu rem ent ran ge multiplied

by the set integration time", th e D/A output of th e integration value becomes 5 V. For example, if t he measurem ent range is 300 W and t he integration time is set to 24 hour s, when th e inte grated value is 7.2 kWh (300 x 24), 14.4 kW h (300 x 24 x 2),

21.6 kW h (300 x 24 x 3)… its th e D/A outp ut will be 5 V (when it is a multiple of

-7.2 kWh, t he D/A ou tput will be -5 V).

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4.6 Setting the D/A Output

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(2) When integration h as started , D/A o utput begins to change.

When i nte grati on h a s stopped, t he l as t D/A o ut put is maintained. When integration has restarted, D/A output begins

to change again. (3) W hen th e integration value is reset, D/A o utput retu rns to 0V. (4) Wh e n t h e i n te gr a ti o n va lu e exceeds±5 V, D/A output returns

to 0V and t hen begins to change again. (5) If t he displayed value is held (by th e HOLD function) during

integration, the D/A out put will be held, too. When the display

HOLD is cancelled, D/A out p ut b egins to ch an ge a gai n according

to integration value.

NOTE

･

Maximum output is 130% (±6.5 V) of range.

･

In the case of plus out of range, about 6.5 V are outputted, for minus out of range, about -6.5 V are outputted.

･

During holding or averaging, the value displayed is outputted.

･

D/A exchanging rate is about five times/second. There is a filter in the output circuit, and the response time is about 0.5 seconds.

･

When integrating by external control, the set range

integrate time will be

5 Vf.s.

･

Depending on the connection mode, there are settings for which D/A output is not possible. There are also values which are basically not measured. In the D/A output setting screen, to make this decision, the following indications appear in the display section d.

1P displays only 1φ3W mode (0 V output in 3φmode) 3P displays only 3φ3W mode (0 V output in 1φmode) 1P,3P displays both 1φ3W and 3φ3W mode Error no measurement

Measurement items are as follows.

Output items Display c

W1, W2, VA1, VA2, var1, var2, PF1, PF2, ○1, ○2, +Wh1,

+Wh2, -Wh1, -Wh2, ±Wh1, ±Wh2

V3, V

SUM

, A3, A

, Ah3, Ip3

SUM

1P (1φonly）

3P (3φonly）

,Ah

, Hz1, Ah1,

, +Wh3,

SUM

1P,3P (Both 1φ and 3φ)

Error (no measurement）

,VA

V1, V2, A1, A2, W

Ah2, +Wh

W3, VA3, var3, PF3, ○3, Hz2, Hz3, Hz

-Wh3, ±Wh3

SUM

, -Wh

SUM SUM

SUM

, ±Wh

, var

SUM

,PF

SUM

, Ip1, Ip2

SUM,○SUM

SUM

For D/A output of the frequencyvalue,set the output item to "Hz1".

If the item of error display is decided by pressing

ENTER

key, the setting is

forcibly changed to the channel which can be output.

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4.7 Setting the PT (Voltage Transformer) and CT (Current Transformer) Ratios

When the secondary side of the PT is connected, by setting the PT ratio, it is possible to directly read the primary side of the PT. When the secondary side of the CT is connected, by setting the CT ratio, it is possible to directly read the primary side of the CT.

4.7.1 Flowchart

Measurement display

SHIFT

PT･CT

PT setting display

Sets the PT, CT

PT･CT

Measurement display

4.7.2 PT and CT Ratios Setting

(1) Enter the PT and CT ratios setting state.

SHIFT

1. Press the

PT･CT

PT ratio flashes

2. Press thePT･CTkey.

SHIFT

key and the SHIFT indicator is lit.

1. Select the PT and CT ratios.

2. Enter the settings.

CT ratio

NOTE

If there is no flashing indication displayed the settings cannot be changed (during HOLD or RUN lit or flashing). In this case, return to the measurement state by pressing thePT･CTkey, and set again after the integration value is reset or hold state is released.

To reset the integration, use the

indicator is flashing) and press

START/STOP

SHIFT→RESET

key to stop integration (RUN

. (Integration value is reset

when the RUN indicator is turned off).

To release the hold state, press the

lit,and press

SHIFT→PEAKHOLD

HOLD

when the HOLD indicator is flashing.

key when the HOLD indicator is

(HOLD state is released when the HOLD indicator is turned off).

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(2) Set the PT and CT ratios.

Moving digits

▲

Moving decimal point

▼

1. Using the ▲ or ▼

display d when the value is flashing.

2. To move the flashing digit, press the or key.

To move the flashing decimal point, use the ▲ or ▼ key,

SETUP

key, set the PT ratio on display c and CT ratio on

ENTER

NOTE

3. Press the

ENTER

key, and the flashing will stop and the setting will be

decided.

Unless this operation is done, the internal setting cannot be changed.

At this time, if the PT or CT is other than 1, the SC (scaling) indicator is lit. If the settings need to be changed again, press either the , , ▲, ▼ keys and the flashing points will reappear.

(3) Move onto the measurement display.

Press the PT･CT key.

･ Setting limits of PT and CT ratios are 0.001 to 9999. ･ If the value is set to 0, such as "0.000", it is forcibly set to 1.000 when

pressing the ENTER key.

･ If the value exceeds 99999M at 130%f.s. input, the following indication will

be displayed. (Means scaling error)

Supplement

Display:

･ When the active and apparent power become scaling error, the reactive

power, power factor, phase angle and power integration value are also scaling error. However, when becomes out of range, "o.r" is displayed.

Other keys operations in PT and CT Ratios Setting mode (SHIFT indicator is lit):

Key Key operation

AVE･FREQ

D/A INTEG PRINT

INTERFACE

*HELP

SHIFT

*: When the interface is in Pr mode, the data is output.

If not

"Err.021" is displayed for 1 second.

Moves to each setting screen.

Sends the setting data to the printer. Displays "Err.017". (for 1 second)

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4.8 Setting the Printer Output

When the interface setting is "Pr." mode, it is possible to print data using a standard printer connected through the GP-IB or RS-232C interface. This section describes how to set the printing interval and the items to be printed.

4.8.1 Flowchart

Measurement display

SHIFT

Printer setting display

Sets for the printer

Measurement display

4.8.2 Printer Output Setting Method

(1) Enter the printer setting state.

SHIFT

1. Press the

2. Press the

SHIFT

key and the SHIFT indicator is lit.

key.

Print interval Hours Minutes Seconds (10 second step)

Effective connection mode Print item

1. Select the print interval and items

2. Enter the settings.

NOTE

If there is no flashing indication displayed the settings cannot be changed (RUN indicator lit). In this case, return to the measurement state by pressing the press

START/STOP

key to stop integration. Then set again from step 1. (RUN

key and

indicator flashing)

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4.8 Setting the Printer Output

Page 66

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(2) Set the print interval and print item.

Setting the value

1. To move the flashing point, press the

SETUP

key.

▲

▼

Moving digit

NOTE

2. To set the value on the flashing digit, press the ▲ or ▼

SETUP

key.

･ The smallest unit of setting limit is 10 seconds and biggest is 100 hours. If

the setting exceeds this limit, it is forcibly set to 100 by pressing the ENTER key.

･ When this setting is used, data is printed by the printer at the same time as

the start of integration.

･ When it is 000.00.0, the unit will not print at the same time as integration. ･ If the number of printed items is large, printing may not be possible within

the specified printing interval. In this case, make the printing interval longer, or reduce the number of items.

3. If in the seconds column and the key is pressed, or in the left hand column of the hour columns and key is pressed, the display will change to the setting of the print item.

Flashing

Pressing the key moves flashing point according to the following cycle. Pressing the key moves reversely.

Displays

000. → 00. → 0 Time V V1 → V2 → V3 → V A A1 → A2 → A3 → A W W1 → W2 → W

VA VA1 → VA2 → VA var var1 → var2 → var

PF PF1 → PF2 → PF

○ ○

1 →

2 →

○

lp lp1 → lp2 → lp3 Current peak

Hz Hz Frequency Ah Ah1 → Ah2 → Ah3 Current integration

+Wh +Wh1 → +Wh2 → +Wh

-Wh -Wh1 → -Wh2 → -Wh

±Wh ±Wh1 → ±Wh2 → ±Wh

TIME Integration time

○

SUM

Meaning

Voltage

SUM

Current

SUM

Active power Apparent power Reactive power Power factor Phase angle

Positive power integration Negative power integration Total power integration

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4.8 Setting the Printer Output

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Selecting item

Setting on or off

▲

▼

ENTER

NOTE

4. Select the item to be printed by using the or key. At this time, unit symbol and channel on display b and d are flashing to indicates the item. "on" shown on display d means that the item is printed. "oFF" shown on display d means that the item is not printed.

5. By pressing the▲or

▼

key, on or off setting can be changed.

Repeat this procedure and select "ON" or "OFF" for every items.

6. Press the

ENTER key, and the flashing will stop and the setting will be

decided.

Unless this operation is done, the internal setting cannot be changed.

If the settings need to be changed again, press either the , ,▲,

▼

keys

and the flashing points will reappear.

･

Depending on the connection mode, there are settings for which printer output is not possible. In the printer setting screen, to make this decision, the following indications appear in the display section c.

1P displays only 1φmode. 3P displays only 3φmode 1P,3P displays both 1φand 3φmode. Measurement items are as follows.

Output items Display c

Supplement

Display:

W1, W2, VA1, VA2, var1, var2, PF1, PF2,○1,○2, +Wh1, +Wh2, -Wh1, -Wh2, ±Wh1, ±Wh2

V3, V

SUM

, A3, A

, Ah3, Ip3

SUM

1P (1φonly）

3P (3φonly）

V1, V2, A1, A2, W Ah2, +Wh

SUM

, -Wh

SUM SUM

,VA

SUM

, ±Wh

, var

SUM

,PF

SUM

, Ip1, Ip2, TIME

SUM

○

SUM

1P,3P (Both 1φ and 3φ)

, Hz1, Ah1,

When the item for 3P in 1φ3W mode or for 1P in 3φmode is selected, the item is not output on the printer.

･

If all items are set to OFF, the displaying fourth item is printed.

(3) Moves onto the measurement display.

Press the PRINT key. The SHIFT indicator is turned off.

Other keys operations in Printer Setting mode (SHIFT indicator is lit):

Key Key operation

AVE･FREQ

PT･CT

D/A

INTEG

INTERFACE

Moves to each setting screen.

*HELP

SHIFT

Sends the setting data to the printer. Displays "Err.017". (for 1 second)

*: When the interface is in Pr mode, the data is output. If

not

"Err.021" is displayed for 1 second.

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4.8 Setting the Printer Output

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4.8.3 Connecting to the Printer

(1) Printer for the GP-IB

1. Set the printer to listen only.

2. For details on the setting method of the 3331, refer to Section 4.9, "Setting the Interface."

3. Connect the 3331 to the printer by using the GP-IB cable.

(2) Printer for the RS-232C

1. Match the settings of the printer and the 3331. (Baud rate, data length, stopbit, and parity)

2. For details on the setting method of the 3331, refer to Section 4.9, "Setting the Interface."

3. Connect the 3331 to the printer by using the RS-232C cable.

NOTE

･ Depending on the printer, either the pin 2 or the pin 3 is the receiver pin.

If the pin 2 is the receiver pin, use a straight cable. If the pin 3 is the receiver pin, use a cross cable.

For the cross cable, use the type indicated in Section 8.1.2, "RS-232C Interface", example for RS-232C cable connections.

･ For interface cables, use screws to secure the cable. Also, always use

shielded cables for the cable to be used.

(3) Setting the 3331

Set to Pr. mode on the 3331. (Refer to Section 4.9, "Setting the Interface".)

(4) Printing sample

Refer to Section 8.7, "Printer Output Function."

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4.8 Setting the Printer Output

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4.9 Setting the Interface

Sets the communication condition for GP-IB interface or RS-232C interface.

4.9.1 Flowchart

Measurement display

SHIFT

INTERFACE

Interface display

Sets for the interface

INTERFACE

GP-IB interface:

Set the address.

RS-232C interface:

Select for the baud rate, data length, parity, stop bit, and communication mode.

Measurement display

4.9.2 Interface Setting

(1) Enter the interface setting state.

SHIFT

1. Press the

INTERFACE

2. Press the

･ GP-IB interface setting

GP-IB interface

･ RS-232C interface setting

RS-232C interface

SHIFT

INTERFACE

Enter the settings.

key and the SHIFT indicator is lit.

key.

Address

Baud rate Data length Stop bit

Parity check Communication mode

NOTE

If there is no flashing indication displayed the settings cannot be changed (RUN indicator lit). In this case, return to the measurement state by pressing the and press

START/STOP

key to stop integration. Then set again from step 1.

INTERFACE

key

(RUN indicator flashing)

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4.9 Setting the Interface

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(2) Select the interface

During flashing on display a, press the ▲ or ▼ key to select.

The display for GP-IB, the address setting is displayed on display c. The display for RS-232C, the settings of data length, parity, stop bit, and communication mode on display d.

(3) Set the interface.

① GP-IB INTERFACE

Moving on display c

etting value

▲

oving to setting item

Setting items

▲

▼

ENTER

▼

ENTER

1. During flashing on display a, move the flashing to display c (address or Pr mode) by using the

or key.

2. Change the settings with the ▲ or ▼ key. The address can be set between 0 and 30. The previous display of "0" or the next display of "30" is Pr. (printer mode).

3. Press the

ENTER

key, and the flashing will stop and the setting will be

decided.

Unless this operation is done, the internal setting cannot be changed.

If the settings need to be changed again, press either the , ▲, ▼ keys and the flashing points will reappear.

② RS-232C INTERFACE

1. Using the or key, move the flashing point to the setting item.

2. Select the flashing baud rate (1200, 2400, 4800, or 9600 bps) on display c with the ▲ or ▼ key.

3. Select the flashing data length (7 or 8 bit) on display d with the ▲ or ▼ key.

4. Select the flashing parity (n :none/ o: odd/ E:even) on the 2nd character from the left end) on display c with the ▲ or ▼ key.

5. Select the flashing stop bit (1 or 2 bit on the 3rd character from the left end) on display d with the ▲ or ▼ key.

6. Using the ▲ or ▼ key, select the flashing communication mode (Pr.: print

mode/ Co.:control mode (character on the right)) on display d.

7. Press the

ENTER

key, and the flashing will stop and the setting will be

decided.

Unless this operation is done, the internal setting cannot be changed.

If the settings need to be changed again, press either the , , ▲, ▼ keys and the flashing points will reappear.

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4.9 Setting the Interface

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(4) Move to the measurement display.

NOTE

Supplement

Display:

Press the

INTERFACE key. (SHIFT indicator off)

Printer mode (Pr.) and Control mode (Co.)

･ When in Pr mode (PRINT indicator is lit), data such as interval print and

manual print are output to the printer.

･ When in Co. mode, only control by the controller is possible through the

interface.

Other keys operations in GP-IB and RS-232C setting mode (SHIFT indicator is lit):

Key Key operation

AVE･FREQ

PT･CT

D/A

INTEG

INTERFACE

Moves to each setting screen.

*HELP Sends the setting data to the printer.

SHIFT

*: When the interface is in Pr mode, the data is output.

If not

"Err.021" is displayed for 1 second.

Displays "Err.017". (for 1 second)

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4.9 Setting the Interface

Page 72

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4.9 Setting the Interface

Page 73

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Chapter 5

Setting and Measurement

Example

5.1 Electrical Power Integration and Printer Output Examples

Will integrate electrical power of 200 V, 10 A max. for 1 hour. Every ten

minutes, the integration time and +Wh

Reset the integration value.

Set the voltage range to 300 V.

will be printed.

SUM

Set the current range to 10 A.

Set the integration time to 1 hour.

Set the printer interval time to 10 minutes.

Set the printer item to TIME and +Wh

Set the interface.

Start the integration.

SUM

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5.1 Electrical Power Integration and Printer Output Examples

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(1) Reset the integration value. (The RUN and HOLD indicators should be turned

off.)

RUN HOLD

START/STOP

SHIFT

HOLD

150 600

300

RANGE [V]

RANGE

RESET

1. When the RUN indicator is lit, press the

START/STOP key to stop

integration. The RUN indicator is flashing.

2. Press the SHIFT→RESET keys to reset the integration value. The RUN

indicator is turned off

3. Press the

HOLD

key to turn off the HOLD indicator when the HOLD indicator

is lit.

4. When the HOLD indicator is flashing, press the SHIFT→HOLD keys to turn off the HOLD indicator.

(2) Set the voltage range to 300 V.

Using the

key, move the flashing to 300 (300 V).

(3) Set the current range to 10 A.

2 5

RANGE [A]

SHIFT

RANGE

INTEG

Using the

key, move the flashing to 10 (10 A).

(4) Set the integration time to 1 hour.

1. Press the

2. Press the

SHIFT

INTEG

key to lit the SHIFT indicator.

key to display settings of integration time. The value in the

left end of the display b is flashing.

Integration time

Hours Minutes

3. Press the key 3 times and the 4th column (a digit for hour) is flashing. (Pressing the key moves the flashing point in the reverse way.)

4. Press the ▲ key once to set to "1".

ENTER

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5.1 Electrical Power Integration and Printer Output Examples

5. Press

ENTER

key to enter "0001.00" (no flashing).

Page 75

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SHIFT

Selecting item

Setting on or off

TIME

▼

SUM

ENTER

▲

ON: +Wh

(5) Set the print interval time to 10 minutes.

1. Press the returned to the measurement display, press SHIFT→ PRINT.

2. Press the key 3 times, and the flashing moves to the column of 10 minutes. (Pressing the key moves the flashing point in the reverse way.)

3. Press the ▲ key once to set to "1".

(6) Set the print item of the printer to TIME and +Wh.

1. Press the key 3 times, and "V" is flashing.

2. Press the ▲ or ▼ key to set to "OFF".

3. Press the key to change the item, and then set to ON or OFF by using the

▲ or ▼ key. Set to ON for +Wh moves the item in the reverse way.)

4. Press the ENTER key, the setting of print interval (10 minutes) and print item (+Wh, TIME) will be decided.

PRINT key during displaying integration setting (If the display is

and TIME only. (Pressing key

SUM

(7) Set the interface.

Press the INTERFACE key during printer setting display. (If the display is returned to the measurement display, press the and then press the INTERFACE key.） When flashing on display a, set GP-IB and RS-232C by using the ▲ or ▼ key.

Using the GP-IB interface

SHIFT

key

1. Using the or key, move the flashing to address.

2. Press the ▲ or ▼ key to set to "Pr".

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5.1 Electrical Power Integration and Printer Output Examples

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Using the RS-232C interface

Setting example: baud rate: 9600, data length: 8, parity: no, stop bit: 1

1. Using the

key, move the flashing point to display c.

2. Set the baud rate to "9600" on display c, using the ▲ or ▼ key.

3. Using the key, move the flashing point to display d.

4. Set the data length to "8" on display d, using the ▲ or ▼ key.

5. Press the key once to move the flashing point to the right.

6. Set the parity to "n", using the ▲ or ▼ key.

7. Press the key once to move the flashing point to the right.

8. Set the stopbit to "1", using the ▲ or ▼ key.

9. Press the key once to move the flashing point to the right.

10. Set the parity to "Pr", using the ▲ or ▼ key.

11. Press the

ENTER

key and the setting will be decided.

(8) Integration start

1. Press the

INTERFACE

key to return the measurement display.

2. Press the START/STOP key.

3. The RUN indicator is lit and the integration starts. "INTEGRATOR START"

is printed on the printer. Integration will print the measurement value every ten minutes, and will stop 1 hour later. (RUN indicator will flash, and "INTEGRATOR STOP" will be printed by the printer)

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5.1 Electrical Power Integration and Printer Output Examples

Page 77

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INTEGRATOR START

00000:00:00 INTEGRATOR TOTAL TIME 00000:00:00

(±) 0.0000k INTERVAL TIME 00000:00:00

(±) 0.0000k

00000:10:00 INTEGRATOR TOTAL TIME 00000:10:00

(±) 0.6691k INTERVAL TIME 00000:10:00

(±) 0.6691k . . .

00001:00:00 INTEGRATOR TOTAL TIME 00001:00:00

(±) 4.0157k INTERVAL TIME 00000:10:00

(±) 0.6694k INTEGRATOR STOP

Start integration

Integration value from the integration start.

Integration value from the previous to this time print output.

Stop integration

・ To continue integration

① When resetting the data and restarting. press the SHIFT→RESET key and

then press the

② When adding data and integrating, press START/STOP key once.

・ To stop operating

Press the "INTEGRATOR STOP" will be printed out.

START/STOP

key once. The RUN indicator will flash and

key.

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5.2 PT and CT Setting

(Examples of Changing the Digits and Moving the Decimal Point)

Explains when using the following PT and CT: PT: primary side 6,600 V secondary 110 V (PT ratio 6,600÷110=60) CT: primary side 2,000 A secondary 5 A (CT ratio 2,000÷5=400)

Reset the integration value.

Release the hold state.

Set the PT ratio to 60.

Set the CT ratio to 400.

START/STOP

SHIFT

HOLD

PEAKHOLD

RESET

PT･CT

Enter the measurement display.

(1) Resets the integration value.

1. When the RUN indicator is lit, press the

START/STOP

key to stop

integration.

2. When the RUN indicator is flashing, press the SHIFT→RESET key to reset the integration value (the RUN indicator is turned off).

(2) Release the hold state.

1. When the HOLD indicator is lit, press the HOLD key to turn off.

2. When the HOLD indicator is flashing, press the

SHIFT→PEAKHOLD

keys to

turn off.

(3) Set the PT ratio to 60.

1. Press the

SHIFT

key and the SHIFT indicator is lit.

2. Press the PT･CT key to make a setting condition. Displays in this case become as follows;

The most significant digit flashes

When PT ratio except 1 is already set that value is displayed. If the most significant digit is not flashing, the holding display state or integration data is not reset. At this time press the

PT･CT

key and return to

normal condition, and then repeat from step 1.

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5.2 PT and CT Setting (Examples of Changing the Digits and Moving the Decimal Point)

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3. Set the PT ratio.

To change the numerical value

Press the ▲ or ▼ key 5 times to set to "6".

To change the flashing to decimal point

Press the

key 4 times.

To move the decimal point

Press the ▲ key once or press the ▼ key 3 times to set to "60.00".

(4) Set the CT ratio to 400.

1. Press the key once, the flashing point moves to the top of the CT ratio.

The most significant digit flashes

NOTE

2. Set the CT ratio.

To change the numerical value

Press the ▲ key 3 times to set to "4".

To change the flashing to decimal point

Press the key 4 times.

To move the decimal point

Press the ▼ or ▲ key twice to set to "400.0".

3. Press the ENTER key to decide the settings ("SC" indicator lit)

If you switch to a different setting display or return to the normal measurement state while this is flashing, the PT and CT ratios remain at their previous settings.

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5.2 PT and CT Setting (Examples of Changing the Digits and Moving the Decimal Point)

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(5) Move onto the measurement display.

1. Press the

PT･CT

key, and the SHIFT indicator will turn off. The SC indicator

(scaling) is lit.

2. The range setting corresponds to the secondary side of the voltage and current transformers. For example, with the 150 V, 5 A ranges, the ranges (resolution) of the scaled voltage, current, active power, and other values is as follows.

Voltage 9.0000 kV 150 V×60 Current 2.0000 kA 5A×400 Active power 18.000 MW (CH1, 2)

36.000 MW (SUM)

Apparent power 18.000 MVA (CH1, 2)

36.000 MVA (SUM)

Reactive power 18.000 Mvar (CH1, 2)

36.000 Mvar (SUM) Current integration 0.00000 kAh (On starting integration) Power integration 0.0000 MWh (On starting integration)

(150 V×5A×60×400)×2 (SUM)

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5.2 PT and CT Setting (Examples of Changing the Digits and Moving the Decimal Point)

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Chapter 6

6.1 When Power Fails

(1) If a power failure occurs during integration, the integration restart

(continues) after the power is restored.

(2) When the GP-IB or RS-232C interface is in "Pr." mode, and if the power

failed while integration was in progress, the measurement data at the time of power failure is printed, together with the integration elapsed time and a message "POWER FAILURE."

(3) During the above power failure processing, the display appears as follows.

Other Functions

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6.1 When Power Fails

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6.2 System Resetting

To carry out a system reset, power on the unit, and hold down the SHIFT →

RESET

This returns all of the settings to their initial values. (These are the same as the settings when the unit is initially shipped from the factory.)

The integration elapsed time and integration value are also reset.

keys during the self test.

Items Settings

Display a Voltage ch1

Display b Current ch1

Display c Active power SUM

Display d Power factor SUM

Connecting mode 3φ

Response Auto

Voltage range Auto-range

Current range Auto-range

Rectifier type RMS

Frequency range Auto-ran ge

Frequency measurement source Voltage CH1

Integrate time 10000:00 (10,000 hours)

PT ratio 1.000

CT ratio 1.000

D/A output items Apparent power SUM

The number of averaging OFF (No averaging)

GP-IB address 1

Baud rate 9600 bps

RS-232C

(GP-IB: interface for communication)

Data length

Parity bits

Stop bits

Communication mode

8bits none 1bit

Co.

Hold OFF (continuous display)

Printing items All items

Print interval time 00:00:00 (interval printing: OFF)

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6.2 System Resetting

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6.3 Error Indications

When there is something wrong for self testing at the power turning on or operates wrong key in integrating or holding the display, error indications are displayed.

Error Indication List

Error

number

001 101

102 103

104 105

011

Backup error (*1, *2, *3)

ROM error (*3)

RAM error (*3)

I/O port error (*3)

Interrupt handler fault (*3)

A/D and D/A converter error (*3)

(Integration) Key operation and external control used together

Errors

Error number

Pages

Requires repair

38, 76

012

013 014

015

016 017

021

022 023

*1 Err.001 (backup error)

Pressing any key frees the display and returns to the normal measurement state. The 3331, however, undergoes a system reset. (Refer to Section 6.2 "System Resetting".)

*2 Error.001 occurs when backup data stored in RAM is corrupted, which can result from

a depleted internal lithium backup battery, external noise ingress or loss of power while changing settings. Please contact your nearest service representative for battery change. The battery would run down after six years.

*3 Err.101 to 105, 001

Indicate internal problems with the 3331. If these error indications appear, the unit re

(Integration) Invalid key press during integration operation

(Integration) Integration started while scaling error has

(Integration) Restarted from maximum integration count or

occurred integration elapsed time

(Integration) Integration reset carried out during integration

Invalid key is pressed during display hold

Invalid key is pressed during setting

(Interface) Data out or help operation is carried out while it is

not in Pr. mode or when interface is not installed

(Interface) No space left in internal data buffer

(Interface) Invalid communication

CH key is pressed in connection mode, which channel can not be changed.

uires repair.

21, 24, 27, 36, 38

38, 76

21, 23, 24, 29, 31

29, 31, 36, 38

163, 173, 174

164, 169

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6.3 Error Indications

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6.4 Changing the Power Calculation Circuit Clock Frequency

Power measurement is carried out by direct input of the voltage and current waveforms to a multiplier, where an instantaneous power waveform is created. This is then passed through a smoothing circuit.

Instantaneous power

U input

Multiplier Smoothing circuit P

I input

To eliminate the multiplier offset, this unit is designed to allow stable measurement of input voltages and currents chopped at a frequency of 2.44 kHz. However, if the input waveform includes a component with a frequency which is an integral multiple of 2.44 kHz, the indicated power value may fluctuate periodically. In this case, use the following procedure to change the frequency (the clock frequency of the power measurement circuit).

1. Turn the power on.

2. Press the

SHIFT→ENTER

3. After self testing, the current frequency is displayed.

keys during self testing.

NOTE

4. By pressing the ▼ or▲ keys change the frequency.

2.37 kHz 2.44 kHz 2.604 kHz

5. Press the

ENTER

key to enter the setting and the normal measurement mode

is returned.

･ This setting is saved in backup memory. It is not changed, even by a system

reset.

･ If a backup error occurs, this is reset to 2.44 kHz. This is also the factory

default setting.

･ While this display is shown, control via the interface is not possible.

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6.4 Changing the Power Calculation Circuit Clock Frequency

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6.5 Key Lock State

While measurement values are displayed, pressing the SHIFT→KEYLOCK keys locks the panel, so that keys other than the SHIFT→ KEYLOCK keys are disabled. (The KEYLOCK indicator lights.)

To release the key lock state (to turn off the KEYLOCK indicator)

1. Press the

2. By using the controller, set the 3331 to remote condition.

This does not inhibit the input of external control signals.

SHIFT

SHIFT→KEYLOCK

KEYLOCK

keys again.

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6.5 Key Lock State

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6.5 Key Lock State

Page 87

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Chapter 7

External Control Terminal and

7.1 Connector Pin Assignment

CAUTION

This connector is not for the RS-232C interface. Do not connect to the personal computer. The unit may be damaged.

Output Terminal

Acceptable connecter (Cable side) (Standard accessory)

Pin No. Meaning

1 GND for analog output, waveform output, D/A output (A.GND) 2 Output 3 Output Analog output of voltage (CH2) (U2) 4 Output

5 Output 6 Output Analog output of current (CH2) (I2)

7 Output 8 Output Analog output of active power (CH1) (P1)

9 Output 10 Output

11 12 Input

13 14

Analog output of voltage (CH1) (U1)

Analog output of voltage (CH3) (U3) Analog output of current (CH1) (I1)

Analog output of current (CH3) (I3)

Analog output of active power (CH2) (P2) Analog output of active power (SUM) (P GND for analog output, waveform output, D/A output (A.GND) Request for print output (PRINT) GND for START/STOP, RESET, PRINT (D.GND) GND for analog output, waveform output, D/A output (A.GND)

SUM

)

15 Output

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Waveform output of voltage (CH1) (U1m)

7.1 Connector Pin Assignment

Page 88

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16 Output

17 Output 18 Output

19 Output 20 Output

21 Output

Waveform output of voltage (CH2) (U2m) Waveform output of voltage (CH3) (U3m) Waveform output of current (CH1) (I1m) Waveform output of current (CH2) (I2m) Waveform output of current (CH3) (I3m) D/A output (D/A OUT)

22 GND for analog output, waveform output, D/A output (A.GND)

23 Input 24 Input

Start/stop integration (START/STOP) Reset integration (RESET)

25 GND for START/STOP, RESET, PRINT (D.GND)

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7.1 Connector Pin Assignment

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7.2 Output Terminal

CAUTION

To avoid damage to this unit, do not shorten the output terminal or input voltage.

(1) Analog output (U,I,Pterminals)

Outputs ±5 V DCf.s. direct voltage for range. Outputs simultaneously for voltage (U1, U2, U3), current (I1, I2, I3) and active power (P1, P2, P

(2) Monitor output (Um,Im terminals)

Waveform output 1 Vf.s. for range. Outputs simultaneously for voltage(U1m, U2m, U3m), current (I1m, I2m, I3m).

(3) D/A output (D/A OUT terminal)

Refer to Section 4.6, "Setting the D/A Output".

SUM

NOTE

･ Output resistance of output terminals is about 100 Ω. ･ Always use the A.GND terminal (pin 1, 11, 14, 22) for the common of

output terminal.

･ Analog output and D/A output voltage is ±5 VDC f.s. for each range. If

scaling or (PT, CT ratio) are being used, the value reached by multiplying the range times scaling value becomes ±5 VDC.

･ When using the measuring range as auto ranging, analog output rate changes

as range changing. Be careful of making mistake for range conversion when recording on the such line measuring value changes hard. In such measurement we advice you to measure in fixed ranging.

･ The analog output response time is about 0.2 seconds (FAST), about 1.6

seconds (SLOW). Note that if there are fluctuations on the line being measured which happen faster than the response time of the unit, errors in the output voltage may occur. When the response is FAST, analog output below 45 Hz includes ripple, and cannot be used as a correct wave form.

･ Always use shielded cables for output and for external control. ･ In 1φ mode, the output of U3, I3, U3m, I3m is 0 V.

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7.2 Output Terminal

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7.3 External Control Terminal

The external control terminals accept a 0/5 V logic signal or a relay contact short/open signal to control the unit. For details of the settings, refer to Sections 4.9, "Setting the Interface", Section 4.3, "Setting the Integration", and Section 4.8, "Setting the Printer Output".

(1) Integration start and stop　(START/STOP terminal)

Integrate time

NOTE

5 V (open)

0 V (short)

Integration start Integration stop

Integration Start/stop

400 ms or more

If integration is started by external control, the integration set time is ignored and can only be stopped by external control. If it is attempted to stop integration by pressing the

START/STOP

key, "Err.011" is displayed.

Integration's setting display will be the following way below.

External control

(2) Reset integration

Over 300 ms

5 V (open)

0 V (short)

Resets integration value during this term

Reset Integration

NOTE

During integration operating (RUN indicator lit), "Err.015" is displayed and it is not possible to reset integration.

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7.3 External Control Terminal

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(3) Data output (Manual printing) (PRINT terminal)

Over 300 ms

5 V (open)

0 V (short)

Data Output

(4) Internal circuit of the external control terminal

Print order is out put to printer during this term.

+5 V

NOTE

10 kΩ

1kΩ

Input terminal

74HC14

0.1 μF

Internal Circuit

Always use the D.GND terminal (pin 13, 25) for the common of external control terminal.

D.GND

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7.3 External Control Terminal

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7.4 Making the Connections

CAUTION

To avoid damage to this unit, do not shorten the output terminal or input voltage.

When connecting the external control terminal or output terminal, use the supplied connector (DB-25P-N, DB19678-2 Japan Aviation Electronics Industry, Limited) or equivalent.

Soldered

Cord

Connector cover

Cable holding part

NOTE

Rear panel

Screw

Shielded cable

･ Make sure the cord is soldered tightly. ･ To prevent the connector from being detached, be sure to fasten the supplied

screws (M2.6×6) with the connector cover. ･ When plugging and unplugging, always hold the connector cover. ･ Always use shielded cables for output and for external control. ･ If the shield of the cable is not grounded, connect it to the connecter cover

or cable holding part described in the figure above.

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7.4 Making the Connections

Page 93

ASCII codes are used .

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Chapter 8

8.1 Specifications

8.1.1 GP-IB Interface

Compliance standard: IEEE-488.1 1987 Reference standard: IEEE-488.2 1987

NOTE

･ On the 3331, if the output queue becomes full, it is cleared and a query error

is generated. This does not correspond to the clearing of the output queue and the outputting of a query error in the deadlock state as stipulated in IEEE 488.2. (A deadlock state occurs when both the input buffer and the output queue are full, and processing cannot continue normally.)

･ This unit does not fully conform to IEEE488.2, and to the extent possible

should be used only for indicated reference data. Also, take care to ensure that each command does not result in overflows of the input buffer and output queue.

GP-IB･RS-232C Interface

Interface Functions Provided

SH1 AH1

SR1 RL1

PP0

DC1

DT1

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All source handshake functions All acceptor handshake functions Basic talk functions, Serial poll function

Talk-only mode is provided. The talker cancellation function with MLA (My Listen Address) is provided.

Basic listener functions Listen-only mode is not provided. The listener cancellation function with MTA (My Talk Address) is provided.

All service request functions All remote/local functions Parallel polling is not provided. All device clear functions All device trigger functions The controller function is not provided.

8.1 Specifications

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8.1.2 RS-232C Interface

Transfer system Baud rate

Data length Parity Stop bits 1 or 2 bits XON/XOFF

Start-stop synchronization 1200, 2400, 4800, 9600 bps 7 or 8 bits Even, odd or none

Can be transmitted and received. (Set with the RS232c:HANDshake command)

An XOFF (13 H) code is transmitted when the input buffer is 3/4 full (750 bytes).

An XON (11H) code is transmitted when the input buffer is 1/4 full (250 bytes).

750 bytes

Input buffer

250 bytes

Input buffer

Hardware handshake

Execution confirmation messages

Electrical characteristics

Input voltage levels Output voltage levels

(load impedance 3 to 7 kΩ)

If XON/XOFF or Hardware handshake is used to set with

RS232c:HANDshake command, the length of a command should be less

than 750 bytes.

Can be transmitted and received. (RS232c: HANDshake command)

After analyzing and executing one line of data (data up to the terminator) from the controller, a numeric data value (ASCII) is returned. The next of terminator, 001th program cord. (RS232c: Set with the ANSWer command) Transmitted data from the 3331 000: no error nnn: error detected in item nnn of the received program code In the case of a query command, the transmission is appended after the response message.

+5 V to +15 V: ON, -15 V to -5 V: OFF +5 V to +9 V : ON, -9 V to -5 V: OFF

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8.1 Specifications

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DOS/V PC Handshake OFF, X

Connector specification

Pin No EIA symbol JIS symbol Common symbol Function

1 CF CD DCD

2 BB RD RxD

3 BA SD TxD

4 CD ER DTR

5 AB SG GND

6 CC DR DSR

7 CA RS RTS

8 CB CS CTS

9 CE CI RI

RS-232C Connector Pin Assignments

To power meter

Data channel detection Reception data Transmission data Data terminal ready Signal ground Data set ready Ready to send Clear to send Call indicator

To PC

Frame

D-sub 9-pin female

To power meter

Frame

D-sub 25-pin

To PC

Frame

D-sub 9-pin female

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D-sub 9-pin female

8.1 Specifications

Page 96

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PC-9801 PC Handshake: HARD

DOS/V, PC-9801 PC Handshake: OFF, X

To power meter

Frame

D-sub 9-pin

Female

To power meter

Connection

Frame Frame Frame

D-sub 25-pin

Female

Connection

D-sub 25-pin Male

To PC

D-sub 25-pin

Male

To PC

Frame

D-sub 25-pin

Female

D-sub 25-pin

Female

D-sub 25-pin Male

D-sub 25-pin

Male

RS-232C Cable

Connecting example of Sanwa Supply's RS-232C Cables (reverse)

Handshake Connecting to the personal computer

DOS/V

NEC PC-9801

KRS-423XF1K KRS-403XF1K

KRS-117K in combination with the D09-9F25F Adapter

OFF, X * HARD

KRS-107K in combination with the D09-9F25F Adapter

*: Hioki's RS-232C cables can also be used when handshaking is OF F or XON/XOFF. ･ 9637 RS-232C CABLE (1.8 m, 9-pin to 9-pin) ･ 9638 RS-232C CABLE (1.8 m, 9-pin to 25-pin)

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8.1 Specifications

Page 97

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8.2 Identification of Controls and Indicators

①

②

① Interface status display

When using the GP-IB interface These indicators show the GP-IB control state:

RMT: Remote

PRINT: Talker (printer mode Pr.) When using the RS-232C interface These indicators show the RS-232C control state:

RMT: Remote

PRINT: Printer mode Pr.

② PRINT OUT/HELP key

When using GP-IB or RS-232C in talk only mode, measuring value or setting state can output with this key.

③ LOCAL key

・Press this key to release the remote state of the GP-IB or RS-232C interface

and to resume the local state. However, the into the local lock out state.

・Pressing this key in local state resets data of the GP-IB and RS-232C

interfaces.

③

LOCAL

key is disabled if the unit

NOTE

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･ If communication is done by a controller, GP-IB and RS-232C will enter

remote state and will not accept key input. In order to input by key, release the remote state by pressing the

･ If the remote mode is set in the key lock state, the lock state is released.

LOCAL

key.

8.2 Identification of Controls and Indicators

Page 98

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8.3 Interface Outline

8.3.1 Features

(1) In the HOLD state, single-shot measurement is possible. (2) IEEE 488.2-1987 standard (essential) commands can be used. (3) This unit can output manual, time interval and help output using the printer

mode.

8.3.2 Messages

Data received or sent by the interface is called a message. The following are the message types:

Command messages

Query messages

Messages

Program messages

Response messages

Execution confirmation messages (RS-232C only)

Of these, program messages are those received by the unit from the controller, while response messages are those sent from the unit to the controller.

(1) Program messages

Program messages can be divided into either command messages or query messages.

Command messages are orders for control of the unit, such as for making settings or for reset or the like.

Query messages are orders for responses relating to results of operation, results of measurement, or the state of device settings.

(2) Response messages

After a query message has been received, a response message is produced the moment that its syntax has been checked. It is also possible to change the message unit separator of response messages from the semicolon ";" to the comma "," when headers are off, using the command "TRANsmit:SEParator". Initially this separator is set to the semicolon ";". A space is represented by "_" in this manual.

Headers on Headers off

"V+101.02E+0;A+10.200E+0" "+101.02E+0;+10.200E+0"

↓

Headers off

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8.3 Interface Outline

"+101.02E+0,+10.200E+0"

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(3) Execution confirmation message

Execution confirmation message is the numeric data (ASCII) created by analyzing and executing one line of data (data up to the terminator) from the controller. This numeric data is returned to the controller. The controller and this unit are synchronized by means of this data. (Refer to Section 8.1.2, "RS-232C Interface".)

8.3.3 Command Syntax

The names of commands for the 3331 are as far as possible mnemonic. Furthermore, all commands have a long form, and an abbreviated short form. In command references in this manual, the short form is written in upper case letters, and then this is continued in lower case letters so as to constitute the long form. Either of these forms will be accepted during operation, but intermediate forms will not be accepted. Further, during operation both lower case letters and upper case letters will be accepted without distinction.

DISPLAY DISPlay DISP

Accepted

8.3.4 Headers

(1) Command program headers

① Simple command header

② Compound command header

③ Standard command header

DISPL DIS

Response messages generated by the 3331 are in long form and in upper case letters.

Whether or not headers are prefixed to response messages is set by the "HEADer" command. It is essential to prefix headers to program messages.

There are three types of command: simple commands, compound commands, and standard commands.

This header is a sequence of letters and digits.

HEADer

This header is made up from a plurality of simple command type headers marked off by colons.

VOLTage:RANGe

This header begins with an asterisk, and continues with a standard command stipulated by IEEE 488.2.

*RST

Error

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8.3 Interface Outline

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(2) Query program headers

These are for commands used for interrogating the unit about the results of operations, about measured values, or about the current states of settings for the unit. As shown by the following examples, they can be recognized as queries by a question mark appearing after the program header. The structure of the header is identical to that of a command program header, with "?" always being affixed to the last command. There are queries possible in each of the three previously described types of command form.

SCALe? SCALe:PT?

8.3.5 Message Terminators

The 3331 recognizes, (1) linefeed character (LF; GP-IB and RS-232C), (2) EOI signal (GP-IB only), (3) LF with EOI (GP-IB only), as message terminators.

To terminate a response message, the 3331 always provides the appropriate EOI signal, and also sends a terminating character sequence. By the use of the "TRANsmit:TERMinator" command either of the following can be selected as response message terminator sequence:

The initial setting is in the column above. A detailed explanation of the "TRANsmit:TERMinator" command is given in Section 8.4.2, "Commands Specific to the 3331."

8.3.6 Separators

(1) Message unit separator

A semicolon ";" is used as a message unit separator when it is desired to set out several messages on a single line.

(2) Header separator

In a message which has a header and data, a space (represented by "_" in the examples) is used as the header separator to separate the header from the data.

GP-IB RS-232C

LF with EOI (linefeed only) LF (linefeed only)

CR + LF with EOI

(carriage return plus linefeed)

"*RST ; :S CALe:CT 4 ; :AV ERaging 64"

":VOLTage:AUTO  ON"

(actually, "_" is not displayed.)

(carriage return plus linefeed)

CR + LF

(3) Data separator

If a message has several data items, commas are required as data separators for separating these data items from one another.

":MEASure?V1 , A1 , W1 , W0"

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8.3 Interface Outline

Hioki 3331 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual