Hioki Super megohm SM7110 - Page 5

Contents
iii
10 Communications (USB,
RS-232C, GP-IB) 129
10.1 Summary and Features of
Interface ........................................ 129
10.2 USB Interface ................................ 130
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Installing the USB driver ...........................130
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Connecting the USB cable ........................130
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Setting the instrument ............................... 131
10.3 RS-232C Interface ........................ 132
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Connecting the RS-232C cable ................132
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Setting the instrument ............................... 133
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Setting the controller (Computer or PLC) .133
10.4 GP-IB Interface ............................. 134
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Connecting the GP-IB cable .....................134
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Setting the instrument ............................... 134
10.5 Settings Common to Interfaces .. 136
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Outputting measured values
(data output function)
(RS-232C and USB only) ..........................136
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Displaying communication commands
(communication monitor function) .............137
10.6 Control by Using Commands ...... 138
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Remote state ............................................138
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Local state ................................................138
11 Specications 139
11.1 GeneralSpecications ................ 139
11.2 Input/Output/Measurement
Specications ............................... 140
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Basic specications ..................................140
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Accuracy specications ............................141
11.3 Functionspecications ............... 145
11.4 InterfaceSpecications ............... 152
11.5 ExternalI/OSpecications .......... 154
12 Maintenance and
Service 157
12.1 Troubleshooting ........................... 157
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Q&A (Frequently Asked Questions) ..........157
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Error display and solution .........................160
12.2 Inspection, Repair and Cleaning 162
Appendix Appx.1
Appx. 1 Internal Circuits ............... Appx.1
Appx. 2 Changes in Current
Running through
Insulator ............................ Appx.2
Appx. 3 Sample calculation of
resistance measuring
accuracy (SM7110) ........... Appx.3
Appx. 4 Countermeasures
Against Noise ................... Appx.4
Appx. 5 Using Instrument as
Ammeter (If Operated
in Combination With
External Power Supply) ... Appx.7
Appx. 6 Assembling Switching
Unit for Objects to be
Measured .......................... Appx.9
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Connecting objects to be measured and
the switching unit to the instrument .....Appx.9
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Selecting relays to be installed in the
switching unit .....................................Appx.10
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Circuit diagram of the switching unit ..Appx.11
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Including current-limiting resistor
(protective resistance) and relay ........Appx.11
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Current-limiting resistor ......................Appx.12
Appx. 7 Modifying Measurement
Lead ................................ Appx.13
Appx. 8 Mounting Instrument in
Rack ................................ Appx.15
Appx. 9 Dimensional Diagram .... Appx.18
Index Ind.1
10
9
8
7
6
5
Appx. Ind.
12
11