Hioki SM7810 User manual

SUPER MΩ HiTESTER
Instruction Manual
SM7810-20
March 2012 Revised edition 1 SM7810A981-01 12-03H
SM7810
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

Contents
i
1
2
3
4
5
6
7
8
9
10
付
録
索
引
11
12
Contents
Introduction.................................................................................1
Confirming Package Contents....................................................1
Safety Information ......................................................................2
Operating Precautions................................................................4
Chapter 1
Overview ___________________________________ 7
1.1 Product Overview and Features .........................................7
Operating Principles and Block Diagram ............................................8
1.2 Names and Functions of Parts ............................................9
1.3 Screen Layout ...................................................................10
Chapter 2
Measurement Preparations___________________ 11
2.1 Installation & Connection Procedures ...............................11
2.2 Connecting the Power Cord ..............................................12
2.3 Connecting the Measurement Cables ...............................13
2.4 Connecting the Measurement Power Source ...................14
2.5 Turning the Power On and Off ..........................................15
Chapter 3
Setting Measurement Conditions______________ 17
3.1 Pre-Operation Inspection .................................................. 17
3.2 Setting Measurement Conditions ......................................18
Chapter 4
Communication (GP-IB/RS-232C Interface)______ 19
4.1 Overview and Features .....................................................19
4.2 Specifications ....................................................................20
4.3 Connect a cable to the GP-IB connector
or RS-232C connector ......................................................21
4.4 Configuring the Communications Protocol ........................23
4.5 Communication Methods ..................................................24
Status Byte Register .........................................................................27
Event Registers ................................................................................29
Error Registers ..................................................................................32

Contents
ii
4.6 Message List ..................................................................... 33
4.7 Listener Specification Precautions .................................... 40
Input buffer size ................................................................................ 40
Reading from the output buffer ........................................................ 40
Chapter 5
External Control ____________________________41
5.1 External Input/Output Connector and Signals .................. 41
Connector Type and Signal Pinouts ................................................. 42
Signal Descriptions .......................................................................... 43
5.2 Timing Chart ..................................................................... 44
5.3 Internal Circuitry ................................................................ 47
Chapter 6
Specifications ______________________________49
6.1 General Specifications ...................................................... 49
6.2 Basic Specifications .......................................................... 50
6.3 Functions .......................................................................... 51
6.4 Measurement Specifications ............................................. 54
6.5 Input / Output Functions (Interface for External Control) .. 57
Chapter 7
Maintenance and Service ____________________59
7.1 Troubleshooting ................................................................ 59
Inspection and Repair ...................................................................... 59
7.2 Replacing the Power Fuse ................................................ 60
7.3 Error Displays ................................................................... 61
7.4 Cleaning ............................................................................ 61
Appendix _________________________________ A1
Appendix 1 Attaching Rubber Feet .............................................A1
Appendix 2 Rack Mounting .........................................................A2
Appendix 3 External Dimensions ................................................A4

Introduction
1
Thank you for purchasing the HIOKI Model SM7810, SM7810-20 Super MΩ HiT-
ester. To obtain maximum performance from the instrument, please read this
manual first, and keep it handy for future reference.
When you receive the instrument, inspect it carefully to ensure that no damage
occurred during shipping. In particular, check the accessories, panel switches,
and connectors. If damage is evident, or if it fails to operate according to the
specifications, contact your dealer or Hioki representative.
Options
□Model 9637 RS-232C Cable (9pin-9pin/Cross/1.8m)
□Model 9638 RS-232C Cable (9pin-25pin/Cross/1.8m)
□Model 9151-02 GP-IB Connector Cable (2 m)
Introduction
Confirming Package Contents
Confirm that these contents are provided.
□Model SM7810, SM7810-20 Super MΩ HiTester (1)
(Model SM7810 Rated supply voltage: 100 VAC, 110 VAC)
(Model SM7810-20 Rated supply voltage: 220 VAC)
□Power cord (1)
□Instruction manual (1)
□Voltage input connector (1)
□Spare fuse (1)
(built into inlet)
□Rubber feet (4)

Safety Information
2
This manual contains information and warnings essential for safe operation of
the instrument and for maintaining it in safe operating condition. Before using it,
be sure to carefully read the following safety precautions.
The following symbols in this manual indicate the relative importance of cautions
and warnings.
Safety Information
This instrument is designed to comply with IEC 61010 Safety Standards,
and has been thoroughly tested for safety prior to shipment. However, mis-
handling during use could result in injury or death, as well as damage to
the instrument. Using the instrument in a way not described in this manual
may negate the provided safety features.
Be certain that you understand the instructions and precautions in the
manual before use. We disclaim any responsibility for accidents or injuries
not resulting directly from instrument defects.
Safety Symbols
In the manual, the symbol indicates particularly important information that
the user should read before using the instrument.
The symbol printed on the instrument indicates that the user should refer
to a corresponding topic in the manual (marked with the symbol) before
using the relevant function.
Indicates that dangerous voltage may be present at this terminal.
Indicates a fuse.
Indicates a grounding terminal.
Indicates a ground terminal connected to the chassis of the system.
Indicates DC (Direct Current).
Indicates AC (Alternating Current).
Indicates the ON side of the power switch.
Indicates the OFF side of the power switch.
Indicates that incorrect operation presents an extreme hazard that
could result in serious injury or death to the user.
Indicates that incorrect operation presents a significant hazard that
could result in serious injury or death to the user.
Indicates that incorrect operation presents a possibility of injury to the
user or damage to the instrument.
Indicates advisory items related to performance or correct operation
of the instrument.

Safety Information
3
Measurement categories (Overvoltage categories)
To ensure safe operation of measurement instruments, IEC 61010 establishes
safety standards for various electrical environments, categorized as CAT I to
CAT IV, and called measurement categories.
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.
Other symbols
Indicates a prohibited action.
*Indicates that descriptive information is provided below.
PAGE
UP
(Bold characters)
Bold characters within the text indicate operating key labels.
(p. #) Indicates the location of reference information.
CAT I Secondary electrical circuits connected to an AC electrical
outlet through a transformer or similar device.
CAT II 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.
CAT III Primary electrical circuits of heavy equipment (fixed
installations) connected directly to the distribution panel, and
feeders from the distribution panel to outlets.
CAT IV The circuit from the service drop to the service entrance, and
to the power meter and primary overcurrent protection device
(distribution panel).

Operating Precautions
4
Follow these precautions to ensure safe operation and to obtain the full benefits
of the various functions.
Before using the instrument for the first time, verify that it operates normally to
ensure that no damage occurred during storage or shipping. If you find any dam-
age, contact your dealer or Hioki representative.
Operating temperature and humidity:
0 to 40°C at 80%RH or less (non-condensing)
Temperature and humidity range for guaranteed accuracy:
23±5°C, 80%RH or less (non-condensing)
Operating Precautions
Preliminary Checks
Instrument Installation
Avoid the following locations that could cause an accident or damage
to the instrument.
Exposed to direct sun-
light
Exposed to high tem-
perature
In the presence of
corrosive or explosive
gases
Exposed to water, oil,
other chemicals, or
solvents
Exposed to high hu-
midity or condensa-
tion(
Exposed to strong
electromagnetic fields
Near electromagnetic
radiators
Exposed to high lev-
els of particulate dust
Near electromagnet-
ic radiators (e.g.,
high-frequency induc-
tion heating systems
and IH cooking uten-
sils)
Subject to vibration
Do not slant the instrument or place it on top of an uneven surface. Dropping or
knocking down the instrument can cause injury or damage to the instrument.

Operating Precautions
5
Handling the Instrument
•Do not allow the instrument to get wet, and do not take measurements
with wet hands. This may cause an electric shock.
•Touching any of the high-voltage points inside the instrument is very
dangerous. Do not attempt to modify, disassemble or repair the instru-
ment; as fire, electric shock and injury could result.
To avoid damage to the instrument, protect it from physical shock when trans-
porting and handling. Be especially careful to avoid physical shock from drop-
ping.
Handling the Cords
Before using the instrument, make sure that the insulation on the Connec-
tion Cable is undamaged and that no bare conductors are improperly
exposed. Using the instrument in such conditions could cause an electric
shock, so contact your dealer or Hioki representative for replacements.
• Avoid stepping on or pinching cables, which could damage the cable insula-
tion.
• To avoid breaking the cables, do not bend or pull them.
• To avoid damaging the power cord, grasp the plug, not the cord, when unplug-
ging it from the power outlet.
• Keep the cables well away from heat sources, as bare conductors could be
exposed if the insulation melts.
Use only the specified connection cables. Using a non-specified cable may
result in incorrect measurements due to poor connection or other reasons.
Before Connecting
•Before turning the instrument on, make sure the supply voltage matches
that indicated on its power connector. Connection to an improper supply
voltage may damage the instrument and present an electrical hazard.
•To avoid electrical accidents and to maintain the safety specifications of
this instrument, connect the power cord only to a 3-contact (two-conduc-
tor + ground) outlet.

Operating Precautions
6
To ensure measurements are accurate,
• Warm up the instrument 60 minutes or more before use.
• The instrument should be calibrated once a year.
Input and Measurement Precautions
•The maximum input voltage and maximum rated voltage to earth are 1000
VDC. If their voltages are exceeded, this instrument will be damaged and
personal injury will result. Therefore, do not input signals in excess of
these values.
•To avoid electrical hazards and damage to the instrument, do not apply
voltage exceeding the rated maximum to the voltage input terminal.

1.1 Product Overview and Features
7
The instrument is an 8-channel, high-sensitivity ammeter for use in measuring
insulation resistance. It can perform insulation measurement of target objects
such as electrical insulators with high resistance values, measuring all 8 chan-
nels simultaneously at high speed. The instrument is designed for use in applica-
tions such as automatic insulation testing, particularly of capacitors.
This insulation measuring instrument requires an external measurement power
source to be provided by the operator. HIOKI offers a recommended power
source (Model SM7860 series Power Source Unit).
Overview Chapter 1
1.1 Product Overview and Features
Easy integration into automated testing sys-
tems
The instrument features a standard external I/O inter-
face, allowing contact check results and comparison
judgment results to be downloaded to other devices.
Additionally, external I/O can be used to easily change
target objects, making it easy to integrate the instru-
ment into an automated testing system.
High-speed insulation resistance measurement
The instrument is a high-sensitivity ammeter for use in in-
sulation resistance measurement applications. The time
from trigger activation to index output is as little as 7 ms.
TRIG
INDEX
Judgment
7 ms (min)
C.C. Measu
rement
Machine cycle
8-channel simultaneous measurement
The instrument can measure 8 channels simulta-
neously, boosting production volume. This capa-
bility improves on previous HIOKI instruments,
which offered 4 channels.
充電3
充電1 充電2
充電ｎ
測定1
測定2
1列
8列
Charge 2
Charge 1 Charge 3
Charge n
Measure 1
Measure 2
Row 1 Row 8
Compatibility with high-
capacity capacitors
Range: 100 pA to 1 mA
The instrument features an ex-
panded current measurement
range to accommodate increas-
ingly high-capacity MLCCs, mak-
ing possible more accurate pass/
fail judgments.
Interface communications
The instrument can be connect-
ed to a control device and con-
trolled via either its GP-IB or RS-
232C interface. Measurement
data can also be downloaded.
Contact check for improved reliability
The instrument can check for poor contact with the ob-
ject under measurement using the capacitance detec-
tion method, and the results of this check can be
output from the instrument.

1.1 Product Overview and Features
8
The instrument is an 8-channel, high-sensitivity ammeter for use in measuring insulation resistance. After
connecting the dedicated external power source to the voltage input terminal (A) and applying voltage to the
object under measurement from the voltage output terminals (OUTPUT), current is measured at the current
input terminals (INPUT). The resistance value is then calculated from the measured current values and the
set measurement voltage values.
The measurement block performs current/voltage conversion using charge measurement type current-voltage
converters (B) that integrate input current values and A/D converters (C). This method allows precise mea-
surement of minute currents by using long integration times.
Having been converted into digital data, measurement block output is sent to the control block (D) memory.
The control block (D) performs arithmetic processing on measurement data that has been input to its memory
and sends output to the instrument’s LCD screen and interfaces.
Operating Principles and Block Diagram
Current-
voltage
converter
A/D
converter
Measuring
interface
Control
unit
EXT I/O
(isolation)
GP-IB
interface
LCD
module
Current-
voltage
converter
A/D
converter
Current-
voltage
converter
A/D
converter
Current-
voltage
converter
A/D
converter
Current-
voltage
converter
A/D
converter
Current-
voltage
converter
A/D
converter
Current-
voltage
converter
A/D
converter
Current-
voltage
converter
A/D
converter
Measuring
interface
INPUT
CH1
CH2
CH3
CH4
INPUT
CH5
CH6
CH7
CH8
OUTPUT
CH1
CH2
CH3
CH4
GUARD
VOLTAGE
INPUT
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
COM
CH5
CH6
CH7
CH8
OUTPUT
Measurement block
Measurement block
A
BC
D
RS-232C
interface

1.2 Names and Functions of Parts
9
1.2 Names and Functions of Parts
Power indicator
Lights up when the instrument is
on.
Trigger indicator
Lights up when the trigger sig-
nal is on.
LCD screen
The instrument’s interface consists
of three display pages, including
measured values, contact check
results, and operating conditions.
"1.3 Screen Layout" (p.10).
Front Panel
Measurement terminals
•INPUT: Current input terminals
•OUTPUT: Voltage output terminals
The instrument’s 8 channels can be
measured simultaneously.
Scroll keys (PAGE UP▲/ PAGE DOWN▼)
Used to scroll through the display pages.
"1.3 Screen Layout" (p.10)
The scroll keys are also used to set the GP-IB address.
(p.23)
Rear Panel
GND terminal
Serves as the ground terminal.
The GND terminal is connect-
ed to the instrument’s enclo-
sure. It is used when shielding
measurement cables.
Power inlet
Connect the supplied power cord
here. (p.12)
POWER switch
Turns the instrument on and
off. (p.15)
: Power On
: Power Off
GP-IB connector
Connect to a computer
when using the GP-IB inter-
face.
(p.21)
RS-232C connector
Connect to a computer when
using the RS-232C interface.
(p.21)
EXT I/O connector
The external I/O connector
can be used to control the
instrument.
(p.41)
Voltage input terminal
Supplies the measurement
power source. Connect the
included voltage input con-
nector.
Fuse holder
Allows the fuse to be replaced.
(p.60)

1.3 Screen Layout
10
The LCD screen consists of three display pages. When the instrument is turned
on, page 1 is shown. The scroll keys on the front of the instrument (PAGE UP▲/
PAGE DOWN▼) are used to scroll among the display pages, which can also be
selected directly by sending the “PAG” command from the GP-IB or RS-232C
interface.
See: Message List "PAG" (p.38)
1.3 Screen Layout
■ Screen P1: Measured value display
■ Screen P2: Contact check results display
■ Screen P3: Operating condition display
Measurement speed
Trigger delay time
Averaging settings
Contact-check
measurement values
Judgment Measurement voltage
Measurement
values
GP-IB address
Channel Measurement range: A (Auto range)
: H (Fixed range)

2.1 Installation & Connection Procedures
11
Be sure to read the "Operating Precautions" (p.4) before installing and connecting
this instrument.
Measurement
Preparations Chapter 2
2.1 Installation & Connection Procedures
Connect to the test sample
9
Install this instrument (p.4)
1
Rear PanelFront Panel
Connect measurement cables
(p.13)
Turn the power on (p.15)
7
Connect the external interface
(as needed)
5
• Using the GP-IB or RS-232C interface
(p.19)
• Using the EXT I/O (p.41)
Connect the power cord (p.12)
2
3
2
35
Make instrument settings (p.18)
(via the external interface)
8
Connect the instrument to the
measurement line (p.14)
4
Be sure to complete the pre-oper-
ation inspection (p.17) before
starting measurement
6
When finished measuring,
turn the power off (p.15)
4
Activate the measurement
power source
Make measurements
7

2.2 Connecting the Power Cord
12
Turn off the power before disconnecting the power cord.
Connection Methods
2.2 Connecting the Power Cord
•Before turning the instrument on, make sure the supply voltage matches
that indicated on its power connector. Connection to an improper supply
voltage may damage the instrument and present an electrical hazard.
•To avoid electrical accidents and to maintain the safety specifications of
this instrument, connect the power cord only to a 3-contact (two-conduc-
tor + ground) outlet.
•Before using the instrument, make sure that the insulation on the power
cord is undamaged and that no bare conductors are improperly exposed.
Using the instrument in such conditions could cause an electric shock,
so contact your dealer or Hioki representative for replacements.
To avoid damaging the power cord, grasp the plug, not the cord, when unplug-
ging it from the power outlet.
Rear Panel
1Confirm that the instrument is turned
off.
2Confirm that the mains supply volt-
age matches the instrument, and
connect the power cord to the power
inlet on the instrument.
3Plug the power cord into the mains
outlet.
Power inlet

2.3 Connecting the Measurement Cables
13
Connection Methods
2.3 Connecting the Measurement Cables
To avoid damage to the instrument, do not apply voltage to measurement termi-
nals.
Front panel
1Connect the measurement cables to
each channel’s current input terminal.
2Connect the voltage output cables to
each channel’s voltage output terminal.
Current input terminals
Voltage output terminals
• The current input terminals incorporate a two-tiered design with both center
and outer conductors. The center conductors are connected to measurement
input, while the outer conductors are connected to guard signals.
• Because the instrument performs high-sensitivity current measurement, noise
occurring on the measurement cables may prevent measured values from sta-
bilizing. Use low-noise shielded measurement cables that meet HIOKI’s speci-
fications.
For more information about measurement cables and voltage output cables,
please contact your dealer or HIOKI representative.

2.4 Connecting the Measurement Power Source
14
Connection Methods
Specifications
2.4 Connecting the Measurement Power
Source
To avoid electrical hazards and damage to the instrument, do not apply
voltage exceeding the rated maximum to the voltage input terminal.
Do not input voltage to the voltage input terminal before connecting mea-
surement cables and voltage output cables. Doing so may result in injury.
When the power is turned off, do not apply voltage to the voltage input terminals.
Doing so may damage the instrument.
Rear Panel
1Confirm that the instrument is turned
off.
2Connect the included voltage input
connector to the voltage input termi-
nal on the rear of the instrument.
Voltage input terminal
This insulation measuring instrument requires an external measurement power
source provided by the operator. HIOKI offers a recommended power source
(Model SM7860 series Power Source Unit).
6 5 47
32
10 8
9
1
Voltage input pin assignments
(View of terminal on instrument)
Pin No. Channel
1CH1
2 CH2
3CH3
4 CH4
5CH5
6 CH6
7CH7
8 CH8
9NC
10 COM

2.5 Turning the Power On and Off
15
Turning Power On
Turning Power Off
2.5 Turning the Power On and Off
Before turning the instrument on, make sure the supply voltage matches
that indicated on its power connector. Connection to an improper supply
voltage may damage the instrument and present an electrical hazard.
Rear Panel
POWER switch
Turn the POWER switch on ( ).
The power indicator and LCD screen on the front of the instrument will light up.
When the power is turned on, the same setting as when the power was last turned off appears
(backup function).
When powered up for the first time, the instrument will be configured with its default settings.
However, the LCD screen is not backed up.
Before Starting Measurement
To obtain precise measurements, provide about 60 minutes warm-up after turning power on.
Before turning the instrument off, turn off measurement power source output.
Turn the POWER switch off ( ).
If a power outage (e.g., breaker trip) occurs when the instrument is on, it will
automatically turn on again when power is restored.

2.5 Turning the Power On and Off
16

3.1 Pre-Operation Inspection
17
Setting Measurement
Conditions Chapter 3
3.1 Pre-Operation Inspection
Do not use a damaged cord because
doing so may result in electric
shock. (Replace the cord with a new
one.)
Metal Exposed
•Is the power cord insulation torn, or is
any metal exposed?
•Is the connection cord insulation torn, or
is any metal exposed?
1
No Metal Exposed
Before using the instrument the first time, verify that it operates normally to ensure that the
no damage occurred during storage or shipping. If you find any damage, contact your dealer
or Hioki representative.
Peripheral Device Inspection
If damage is evident, request re-
pairs.
Yes
Is damage to the instrument evident?
When turning power on
Do the “HIOKI”, “SM7810” and version num-
ber indications appear on the display area?
No
2
The power cord may be damaged, or
the instrument may be damaged in-
ternally.
Request repairs.
No
Yes
Inspection complete
Please read the "Operating Precautions" (p.4) before use.
Use of a supply voltage outside the
specified range may damage the in-
strument or cause electric shock.
Before turning the instrument on,
make sure the supply voltage
matches that indicated on its power
connector.
No
Does the supply voltage of your power
source match the supply voltage indicated
above the power source inlet on the rear of
the instrument?
Yes
Instrument Inspection