Hioki MR8875 Manual de usuario

MEMORY HiCORDER

Measurement Guide

MR8875

March 2014 Revised edition 2 MR8875A983-02 14-03H

Introduction

Thank you for purchasing the HIOKI Model MR8875 Memory HiCorder. This Measurement Guide includes

basic examples of how the instrument is used. Please read it carefully before using the instrument.

Convenient functions (p.18), measurement examples (p.19), and reference information (p.21)

Introduction

Screen Organization

and Operational

Overview (p.2)

Measurement

Preparations (p.5)

Configuring Settings

before Measurement

(p.7)

Performing

Measurement (p.11)

Analyzing

Measurement Results

(p.12)

TheWaveformscreenallowsyou toviewmeasurementdata,whilethe

Settings screen allows you to configure various instrument settings.

Basic settings can also be configured on the Waveform screen’s

settings windows. (This manual covers the settings that can be

configured on the Waveform screen in its description of how to op-

erate the Waveform screen.)

Be sure to read the "Operating

Precautions" and "3.3 Pre-Mea-

surement Inspection" sections of

the instruction manual before us-

ing the in-

strument.

Configure measurement conditions.



Configure input channels.



Configure triggers (identification conditions).



Configure data saving, calculations, and other settings as neces-

sary.

If you wish to save data or perform calculations automatically after

starting measurement, these settings must be configured before

measurement. Data can be saved in a variety of formats, and cal-

culations can be performed after measurement.

Alternately, recording

stops when the set condi-

tions are satisfied.

This section describes operations and analytical methods that are

frequently used on the Waveform screen.

Screen Organization and Operational Overview

Part names

Screen Organization and Operational Overview

Analog input terminals

(BNC terminals)

Connect optional connection

cords, clamps, and other input

sources here.

Battery compartment cover

Install the Z1003 Battery Pack here.

Ventilation holes

(Do not block.)

POWER (LED)

Turns green when the power is on.

CHARGE (LED)

Turns orange when the instru-

ment is charging.

HELP key

Displays an explanation of the

screen display.

(forced trigger) key

Applies a user-specified trigger.

SAVE key

Saves data manually.

START key

Starts measurement. The key

turns green while measure-

ment is in progress.

STOP key

Stops measurement.

USB cable slot

Connect the included USB cable when con-

necting the instrument to a PC.

USB flash drive slot

Connect a USB flash drive here.

100BASE-TX connector

Connect a LAN cable here.

LOGIC terminals

Connect optional logic probes.

SD memory card slot

Insert an SD memory card.

Input modules

(up to 4 can be installed)

UNIT 2

UNIT 4UNIT 3

Back Front

Top

Left side Right side

CH1-1 CH1-4

UNIT 1

AC adapter socket

POWER switch

External power supply

terminals

External control terminals

KEYLOCK switch

Screen Organization and Operational Overview

Screen organization

Waveform screen

[Channel] screen

[Calculation] screen

[Status] screen

[Trigger] screen

Configures input channels. You can also config-

ure the channel display and other functions.

Configures the measurement method. You can

also configure the waveform display, auto save,

and other settings.

Configure when you want to start and stop re-

cording based on a specific signal. Configures settings related to waveform value

calculations.

You can change various settings on the Wave-

form screen’s settings windows.

Switches between the Waveform screen and the Settings screen.

Screen Organization and Operational Overview

Screen operation

[File] screen[System] screen

Configures the system environment, external

I/O, and communications. Displays files on media and configures settings

such as the method used to save data.

Tap

Touch the screen with your fin-

ger and then remove your finger.

Touch

Touch the screen with your finger

for a longer amount of time.

Drag

Move your finger while touching

the screen.

Switching screens Changing settings

The setting will change

each time you tap the

screen.

Select from a list

A more detailed tab will be dis-

played. Tap the screen button again

to return to the previous display.

Increases or decreas-

es the value by 1.

Increases or de-

creases the value.

You canchange the value

fromthevalueinputpanel.

Example:

You can switch between the

Waveform screen and the Set-

tings screen.

You can display various settings

windows on the Waveform

screen and use instrument func-

tions. You can also switch pages.

Screen Organization and Operational Overview

1. Measurement Preparations

Connecting the instrument

Before using the instrument, be sure to read the “Operating Precautions” and “Pre-Measurement

Inspection” sections of the instruction manual.

(Example: Connect the

MR8901 Analog Unit

connection cord.)

Turn on the instrument. Connect to the

measurement target.

Insert media

(SD memory card or USB flash drive).

Only an SD memory card can be used when

saving data in real-time.

Connect the measurement cables to

the input module.

Connect the AC adapter.

If using the optional battery

pack, see the instruction

manual.

Setting the clock

The time is displayed on the bottom right of the screen. Change the time if it is not correct.

Tap [Apply] to accept the settings.

To return to the previous screen without changing the

time, tap [Close].

Tap [Time Setting].

The Settings window will open.

Tap the field you wish to change and set the

desired value.

Open the screen.

[Setting Display] [System] [Initialize]

Screen Organization and Operational Overview

Performing zero adjustment

[Zero Adjust] [Yes]

Perform zero adjustment.

Set the display to [Detail].

This procedure compensates for input module differences and sets the instrument’s reference potential to

0 V. (MR8901, MR8902 and MR8905 only) Zero adjustment can be performed for all input modules at

once.

For more precise measurement, allow a warm-up period of about 30 minutes to elapse after turn-

Open the screen.

[Waveform Display] / [Setting Display] 

[Channel] [Analog]

When using the MR8903 Strain Unit

Zero adjustment cannot be performed for the

MR8903. Instead, perform [Auto Balance]. For

more information, see the instruction manual.

Screen Organization and Operational Overview

Before starting measurement, it is necessary to configure measurement conditions, input channels,

triggers, and other settings. To save data automatically after starting measurement, it is necessary to

configure data save settings before measurement.

Measurement and save methods

There are two methods for saving data, as explained below: you can save data automatically after

starting measurement, or you can save data manually (with the SAVE key) after measurement is com-

plete. This manual describes how to save waveforms automatically while performing measurement

using the MR8901 Analog Unit. For other more detailed information, see the instruction manual.

2. Configuring Settings before Measurement

Performing measurement while saving data automatically

Real-time save

•The recording interval, recording time, and other

recording conditions are set before starting mea-

surement. (Unlike when using auto save, you will

not be able to select high-speed sampling.)

•Data is recorded directly to the SD memory card

while measurement is performed.

•Since data is recorded directly to the SD memory

card, it is possible to record data in excess of the

internal memory capacity.

Auto save

•The sampling speed (or time axis), recording

length, and other recording conditions are set

before starting measurement. Measurement can

be performed using high-speed sampling.

•Data equivalent to the set recording length is

acquired in the instrument’s internal memory and

then saved to the storage destination. Data can

be saved to an SD memory card or USB flash

drive or sent by e-mail or FTP.

•Since data is saved to the instrument’s internal

memory, it is not possible to record data in excess

of the internal memory capacity.

Recordinglength

(division)

Data is saved after being acquired to the

internal memory.

Dead time: Data is not recorded if the trigger is ap-

plied during this interval.

Recording time

Data is recorded directly to the SD memory card.

End

Saving data by pressing the SAVE key at any time after measurement

Set data to be

saved. Save data.

Quick save

Thedata to be saved is set in advance. Thenyou can

save that data immediately at any time by pressing

the SAVE key.

Selection save

The data to be saved is set after you press the SAVE

key. Then the data is saved.

Set thedata to be saved and save

the data.

Screen Organization and Operational Overview

Settings can be configured on setting windows on the Waveform screen or on the Settings screen.

Setting measurement conditions

Select the desired set-

ting from the [Time-

base] list.

Set the time per division on

the horizontal axis. Sampling

is fixed to 100 samples per

division. If you do not wish to

change the setting, tap the

current setting to re-select it.

To keep the current setting,

tap the setting again.

Select the desired set-

ting from the [Shot]

list.

Set the length (number of di-

visions) to record each time

data is acquired. If you do not

wish to change the setting,

tap the current setting to re-

select it.

Waveform screen ([Status] window)

"Configuring input channels" (p.9)

Open the screen.

[Waveform Display] [Status] [Basic]

or [Setting Display] [Status]

Arranging measurement results

The method used to display measurement data on the

Waveform screen can be changed to allow a maximum of

four sheets, with up to four segments per screen.

Related settings are configured on the [Display] window.

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