Hioki 8847 Manual de usuario

MEMORY HiCORDER

Measurement Guide

8847

December 2010 Revised edition 2 8847A983-02 10-11H

Read first.

Offers an introduction to the Memory

HiCorder's basic measuring method for first

time users.

Introduction

Thank you for purchasing the HIOKI "Model 8847 Memory HiCorder."

This Measurement Guide consists of some basic application examples. Before

using the instrument, be sure to read the Instruction Manual carefully.

The following documents are provided with this instrument. Refer to them as appropriate for your applica-

tion.

Contents

Introduction

Document Description

1Measurement Guide

(This document)

Read first.

Offers an introduction to the Memory HiCorder's basic measuring method for first

time users.

2Instruction Manual Contains explanation and instructions regarding the instrument's operating meth-

od and functions.

Screen structure and

operation overview The following explains the screen structure and overview of the

operation keys of the main instrument. (p.2)

Measurement Prepara-

tions The following explains the things to be done before carrying out

measurement. (p.4)

Measurement Procedure The following explains the flow from pre-measurement check to

analysis/saving/printing. (p.6)

Measure the commer-

cial power supply

The following explains how to record waveforms of a commer-

cial power supply of 100 V.

The following explains how to save the data. (p.8)

Monitor abnormal occur-

rences

The following explains how to record a voltage dip caused by a

special occurrence such as a black out.

Using the trigger function to carry out constant monitoring, only

the abnormal occurrence can be recorded.

The following explains the method to automatically save data.

(p.10)

Analyze

Waveform measurement value can be viewed or calculated us-

ing the A/B cursor.

The following explains how to display the measured waveform

without overlapping.

(p.12)

Print The following explains the printing method. (p.17)

Convenient functions The following explains the auto range function, pre-trigger and

probe compensation. (p.19)

Others The following are explanations for the screen, time axis and

sampling, record length setting, voltage axis and optical resolu-

tion, and file transfer speed. (p.21)

Screen structure and operation overview

Screen structure In the sheet tab screen, the sheet can be changed by pressing the key.

Screen structure and operation overview

Waveform screen

Screen to set measurement methods, cal-

culations for waveforms, and etc.

File screen

Status screen

Screen to set environment, save file, set

printing, set communication, and initialize

data.

System screen

The screen to set the various Channel

Scaling Comments.

Channel screen

Settings window

Trigger settings

window

Channel settings

window

Screen to view waveforms. Screen to view data files in the media

(CF card, HDD, USB, internal memory).

Window to set details for

the Analog/Logic Channel. Window to set details for

the trigger.

Waveform screen can

be displayed.

Sheet tub

Shows names of sheets

that can be selected.

Screen structure and operation overview

Operating Keys

ABCSR key

Displays the A/B cursor settings

window.

START key

Starts measurements

The green LED at the upper is lit

during measurement.

Inner: Jog

Outer: Shuttle

Scrolls waveforms

DISP key

Displays the Waveform screen. STATUS key

Displays the Status screen.

FILE key

Displays the File screen.

Fkey

Select setting items

PRINT key

Prints waveforms SAVE key

Saves data to storage media.

The LED to the right of the key lights up in blue.

ESC key

Cancels an operation.

Removes the displayed dialog and

window

CURSOR key

Moves the cursor up, down, left and

right on the screen.

KEY LOCK:

Press and hold the right and left

CURSOR keys for three seconds to

disable key operations.

To cancel key-lock, hold the keys

again for three seconds.

TRIG.SET key

Displays the trigger settings window

on the Waveform screen.

CH.SET key

Displaysthechannelsettingswindow

on the Waveform screen.

SYSTEM key

Displays the System screen. CHAN key

Displays the Channel screen.

Manual trigger key

Issues a manual trigger event.

WAVE key

Assigns the Jog & Shuttle knobs to

waveform scrolling.

FEED key

Feeds paper

COPY key

Prints a hard copy of the

display screen

HELP key

Opens help

information AUTO key

Starts auto-range

measurement

STOP key

Stops measurements

1 press: Measurementstopsafterthe

set recording length

2presses:Immediate stop

Move the setting cursor to the item.

To change the setting content

Select

Settings cursor

The current cursor location is

indicated by flashing.

Measurement Preparations

At least 5 cm

All at least 5 cm

Install the instrument To prevent overheating, be sure to leave the specified clearances around the unit.

Set the items necessary to the device

Connect the Probes

and Cords

Insert the USB

memory stick

Insert the CF Card.

Set the recording paper

Connect the power cord

Right side

Left side

Front

Refer to the instruction

manual for details.

Measurement Preparations

Supply the power

Power On

Right Side

Setting the clock

Carry out setting in the [Init] sheet. The date and time indication is shown

at the top right of the screen.

Perform zero-adjust

This procedure compensates for input module differences and sets the reference

potential of the instrument to 0 V.

Carry out setting in the [Unit List] sheet.

For best measurement precision, a warm-up period of about 30 minutes after power-on is recommended.

[Exec Zero-Adjust] can still be selected in the channel settings window ([Analog]

sheet).

(Press the DISP key (Waveform screen) →press the CH.SET key (Channel settings

window))

Point

1. Move the cursor to this position.

2. Select [Exec Zero-Adjust].

Measurement Procedure

Before measuring, please read “Operating Precautions” in the instruction manual.

Measurement Procedure

Perform the inspection before measurement

Please read “Pre-Measurement Inspection” in the instruction manual.

Connect to the measurement point

Set the measurement conditions

Carry out setting in the Waveform screen.

• Measurement function

• Timebase

• Recording length ([Shot])

Carry out settings in the Channel set-

tings window ([Analog] sheet).

• Vertical axis (Voltage axis) range

Carry out settings other than the above

mentioned, when necessary.

Start or stop measurement

Start Measurement Stop Measurement

Measurement Procedure

Analyze, save and print

Scroll and view the waveform.

Waveform display can be changed.

(You can zoom in or out)

Save data.

Data can be automatically saved under the

pre-set saving conditions.

View saved data.

Data can be loaded, and file can be deleted and

copied.

Print the recorded waveform.

Analyze

Save

Measure the commercial power supply

The following explains the method of recording voltage waveform for a commer-

cial power supply of AC 100 V (50/60 Hz).

The method of saving the data after measuring will also be explained.

Here the level trigger is used to measure.

To measure repetitive waveforms such as commercial power supply, setting the

measurement start point as the standard level trigger level will make it easier to

observe the waveforms.

Measure the commercial power supply

Trigger

level

0 V

1 Prepare for measurement

Required items:

8847

8966 Analog Unit

L9198 Connection Cord

CF Card

"Measurement Prepara-

tions"(p.4)

Insert the CF card.

Connect to CH1.

Connect to the

measuring point.

Connect to the socket.

2 Set the measurement conditions and trigger conditions

Move

the cursor

Displays theWaveform

screen.

Displays the Trigger

settings window

([Analog Trig] sheet)

Displays the Channel

settings window

([Analog] sheet)

Carry out the following setting on the Waveform screen.

Deciding on the horizontal axis (time axis)

range

The horizontal axis (time axis) range is calculated

from the frequency and cycle.

f [Hz] =1/t [s] (f: frequency, t: cycle)

Example: When the measurement frequency is 50 Hz.

E.g. 1 cycle is t= 1/50 [s], i.e. 20 ms.

When the horizontal axis (time axis) is set to 20 ms/

div, exactly 1 cycle will be displayed in 1 division (1

square).

Vertical axis (Voltage axis) range

If you change the range during a measurement, the

measurement will restart.

Level

Set to [0 V].

Set the measurement conditions. (Channel settings window)

Setting for trigger conditions (Trigger settings window)

Select setting

items

Vertical axis (Voltage axis) range

Set the value for 1 div of vertical axis

Trigger type

Set to [Level].

Slope

Set to [↑].

Timebase

Set time for 1 div of horizontal axis. 3

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