Hioki Super megohm SM7110

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Appx.8

Using Instrument as Ammeter (If Operated in Combination With External Power Supply)

Press the START key.

A measurement starts.

Determining protective resistance

See “Current-limiting resistor” (p. Appx.12).

Main Page

Verifying Package Contents8
Main Unit and Accessories8
Measurement Procedure11
Starting the Measurement11
Safety Information12
Symbols on the Instrument13
Measurement Categories14
Operating Precautions15
Instrument Installation15
Product Overview and Features23
Names and Functions of Parts24
Screen Configuration and Operation29
Measurement Screens29
Settings Screens29
Measurement Conditions31
Basic Key Operation32
Displaying Measurement Screen32
Displaying the Various Menu Settings Screens32
Selecting Settings Items33
Methods for Changing Numerical Values34
Preparing for Measurement35
Connecting Power Cord to Instrument35
Connecting Measurement Leads to Instrument36
Connecting Electrode36
Connecting Humidity Sensor37
Outputting Measurement Current Value Converted to Analog Signal41
Turning On/Off Instrument42
Inspection before Use43
Basic Measurement45
Setting Measured Value Display Mode45
Changing Display Notation46
Changing Displayed Digits46
Setting Measurement Speed49
Changing Current Range50
Connecting Measurement Leads or Electrode to Object to be Measured51
Starting/Stopping Measurement52
Confirming Measurement Results52
Basic Measurement Examples53
Applied Measurement55
Starting Measurement after Measured Value Becomes Stable (Delay Function)55
Reducing Variation in Measured Values (Average Function)56
Setting Voltage Value for Resistance Calculation62
Changing Measurement Starting Conditions (Trigger Function)64
Setting the Trigger Mode64
Inputting an External Trigger65
Maintaining Measurement Accuracy (Self-Calibration Function)66
Contact Check (Executing Contact Check, Setting Reference Value)77
Setting Resistivity Calculation (Resistivity Measurement Function)79
Measurement Principle83
Measurement with Use of a Measurement Fixture84
Measurement Without Use of a Measurement Fixture85
Impact of Temperature85
Automatic Measurement86
Measuring Flat Sample88
Measurement Using Pin Type Terminals88
Measurement Using an Electrode for Measuring Surface Resistance88
Measurement Using an Electrode for a Flat Sample89
Volume Resistance Measurement and Surface Resistivity Measurement (the Functional Role of the Guard Electrode)89
Measuring a Liquid Sample92
When Using an Electrode for Liquid Samples92
Measurement with Use of Shielding Box93
Measuring Current94
Connection Method94
Judging Measured Value (Comparator Function)95
Setting Judgment Sound97
Confirming Judgment Results98
Saving and Loading Settings (Panel Saving and Loading)99
Saving Settings (Panel Saving Function)100
Loading Settings (Panel Loading Function)101
Changing Panel Name102
Deleting Panel Contents103
System Setting105
Setting Sound of Key Operation105
Disabling Key Operation (Key Lock Function)106
Browsing, Deleting, and Outputting Internal Memory Data107
Browsing and Deleting Data108
Adjusting Screen Contrast110
Adjusting Backlight Brightness111
Changing Power Frequency Setting (Power Frequency Setting Function)111
Initializing Settings (Reset)112
Default Setting List113
Checking Instrument Information114
External Control (EXT I/O)115
Switching Current Sink (NPN) / Current Source (PNP)116
External Input/Output Terminals and Signals116
Instrument-Side Connector and Mating Connectors116
Instrument-Side Connector Pin Assignment117
Input Signal118
Output Signal119
Timing Chart120
From When Measurement Starts to When Judgment Result Is Acquired120
Output Signal Status on Start-Up125
Flowchart for Acquiring a Judgment Result or a Measured Value with the External Trigger Setting125
Internal Circuit Configuration126
Electrical Specifications127
Examples of Connection128
Assembling Male Connector for EXT I/O (Accessory)129
EXT I/O Terminal Input and Output Testing130
Settings for External Input and Output131
Trigger Logic131
Trigger Filter132
GO-Signal Outputting Logic Level133
EOM Signal Output Mode134
Summary and Features of Interface135
Usb Interface136
Setting the Instrument137
Connecting the RS-232C Cable138
Setting the Controller (Computer or PLC)139
Gpib Interface140
Connecting the GP-IB Cable140
Settings Common to Interfaces142
Outputting Measured Values (Data Output Function) (RS-232C and USB Only)142
Displaying Communication Commands (Communication Monitor Function)143
Control by Using Commands144
Remote State144
Local State144
General Specifications145
Input/Output/Measurement Specifications146
Basic Specifications146
Accuracy Specifications147
Function Specifications151
Interface Specifications158
External I/O Specifications160
Maintenance and Service163
Troubleshooting163
General Items163
Measurement Items164
Error Display and Solution166
Function Errors166
Measurement Errors167
Other Errors167
Inspection, Repair and Cleaning168
Appx. 2 Changes in Current Running through Insulator170
Effects of Conductive Noise173
Connecting Objects to be Measured and the Switching Unit to the Instrument177
Circuit Diagram of the Switching Unit179
Including Current-Limiting Resistor (Protective Resistance) and Relay179
Current-Limiting Resistor180
Resistance Value180

Hioki Super megohm SM7110 - Page 176

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