Hioki SM-8213, SM-8215, SM-8220 Instruction Manual

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Melrose, MA 02176

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Instruction Manual

SM-8213
SM-8215
SM-8220

SUPER MEGOHMMETER

March 2013 Revised edition 5 SM8213A981-05 13-03H

The super megohmmeter is a unique resistance meter designed to measure highresistance in a wide range.

The meter outputs a high test voltage – 1000 V maximum for the SM-8220/8215, and 100 V
maximum for the SM-8213 – to apply across the sample circuit.
Operators are requested to read this operation manual thoroughly before trying to operate the
instrument for safety and to prevent electrical shock and damage to the measured circuit.
Keep this manual where all staff can access it any time.

i

1. Safety Precautions

Operators of the SM-8200 Series super megohmmeter are requested to read this operation
manual thoroughly before operation for safety and to obtain best performance.
Operators are also requested to strictly observe all the DANGER, WARNING, and CAUTION
notices in this manual and on the instrument to prevent injury and damage.

1-1 Safety Warnings

This operation manual includes some DANGER!, WARNING!, and CAUTION! notice with a

symbol. These must be observed for safety of the operator and other persons, as well as for
protection of your super megohmmeter and samples from possible damage and destruction.

A “DANGER” CALLS ATTENTION TO A CONDITION OR POSSIBLE
SITUATION THAT CAN CAUSE DEATH OR INJURY TO THE

OPERATOR OR NEAR PESONS.

A “WARNING” CALLS ATTENTION TO A CONDITION OR POSSIBLE
SITUATION THAT COULD CAUSE DEATH OR INJURY TO THE
OPERATOR OR NEAR PESONS.

could cause injury to the operator or persons nearby and damage and

destroy the super megohmmeter and samples.

DANGER

WARNIN G

CAUTION

A “CAUTION” calls attention to a condition or possible situation that

ii

This symbol is s how n a t p ats w h ose us age needs

This symbol is shown at the Rx

Measuring term inals which carry a high voltage

This symbol is shown at the GND

cannot be grounded, this terminal must be

connected to the ground.

2) DANGER and WARNING Labels on the Rear Panel

1.2 Symbols on the Super Megohmmeter

Symbol Meaning Description

WARNING

DANGER –

referen ce to t he op erati on ma nual.

HIGH VOLTAGE
HAZARD

to be applied across the circuit to be measured.

terminal on the rear of the unit. If the
ground prong of the power cord plug

Safety Warning Labels on the Super Megohmmeter

警告、危険シール

1) DANGER and WARNING Labels on the Housing and Front Panel

““/”+”

正面パネル

背面パネル

危険

DANGER

高電圧危険

端子より高電圧発生の為、

感電の恐れあり。

HIGHVOLTAGE

Terminals carry high voltage.

Elec tric shock hazard!

iii

2. Op

s

t

8220/8215) or 100 V

(SM-8213) for measurement.

d

on the r ear of the in stru men t to a

ground. When the power cord plug is connected to the AC line socket via an

prong adapter, the green ground tab of the ad apter to the

t

may be present for several minutes after the

contact

s

n

Use the right size and amperage power fuse. If a fuse of incorrect amperage is inserted

is not level or

erating Environmental Precautions

D

DANGER

■Do not operate the super megohmmeters in the presence of flammable gas. There is

possibility of an explosion and/or fire.

■Do not touch the Rx “–”/“+” measuring terminals on the front panel of the instrumen

during measurement. They output a maximum of 1000 V (SM-

WARNING

■ Ground the ground prong of the power cord plug to avoid electrical shock. If the groun

prong cannot be grounded, connect the GND terminal

accessory 3-prong to 2­ground.

■ Do not remove the housing cover of the instrument. Even after turning off the instrumen

powe

r switch, a dangerous residual voltage

power is turned off. If repair or internal readjustment is needed, contact your
your dealer or Hioki representative.

CAUTION

■Before turning on the power switch for the instrument, check that the VOLTAGE

SELECTOR switches are set for your local AC line voltage. If the wrong AC line voltage i

applied to the unit, it will be damaged (higher voltage supply) or will not functio

properly (lower voltage supply).

See 1.3 Setting VOLTAGE SELECTOR Switches for setting.

into the fuse holder, the unit will be damaged.

See 1.4 Checking the Fuse Amperage for a correct fuse amperage.

Do not insta ll or operate the supe r meg hommeter on a su rface w hich

■

not stable.

iv

3. Inst

Do not install or place the super megohmmeter in a location which is not level, not

h

absorbing

r

f

5 to

allation Precaution

CAUTION

stable or not sturdy enough to hold the instrument and other related items.

4. Instrument Handling Precautions

WARNING

■ If the instrument generates smoke or smell, unplug the power cord.
If such an instrument is kept powered on, it may cause a fire.

contact y our d ealer or Hi oki rep res entati ve fo r repa ir.

■Do not o pera te th e ins trum ent wi th a w et han d. Thi s ma y caus e elec tri cal sho ck.

CAUTION

■When moving or transporting the super megohmmeter, avoid shock and vibration as muc

as possible. For long-distance transportation, put the instrume nt in a shock-

carton or use the original shipping carton.

■When not using the super megohmmeter for an extended period of time, unplug the powe

from the AC line socket. Put a dust cover on the instrument. Store it in a place free o

cord

corrosive gas and vibration, with a surrounding temperature within the range from –

45℃, and humidity 80% RH or less(non-condensating).

■Do not pl ace an ythi ng on th e inst rum ent.

v

BRIEF DESCRIPTION

About the SM-8200 Series Super Megohmmeters

The SM-8200 Series super megohmmeters are insulation resistance meters consisting of a constant voltage

power supply and a high sensitive current measuring section. The super megohmmeters are designed to

measur e the el ect rical resi stan ce of i nsul atin g mat erial s with high insul atio n pro perti es.
The resistance measuring ranges of the SM-8200 S eries are as follows:
SM-8213: 2.5×104 to 2×1012Ω
SM-8215: 2.5×105 to 2×1013Ω
SM-8220: 5.0×104 to 2×10

16

Ω

Each model of the super megohmmeters is provided with an LCD 320×240 dot display for easy
observation of necessary information, including measuring voltage, measured resistance in both
digital and analog, timer, and resultant GO/NO judgment.
The following shows the main specifications for the super megohmmeters.
For detailed specifications, see 2. SPECIFICATIONS.
For optional accessories, see 9. OPTIONAL ACCESSORIES.

Main Specific ations –

For optional accessories, see 9. OPTIONAL ACCESSORIES.

For detailed spec ifications , see 2. SPEC IFICATIONS.

Measuring Voltage Ranges:
SM-8213 – 5, 10, 15, 25, 50 and 100 V
SM-8215 – 50, 100, 250, 500 and 10 00 V
SM-8220 – 10, 25, 50, 100, 250, 500 an d 1000 V
Measuring Resistance Range:

SM-8213: 2.5×104 to 2×1012Ω
SM-8215: 2.5×105 to 2×1013Ω
SM-8220: 5.0×104 to 2×10

16

Ω

Timer Function: Provided
Comparison and Judgme nt Function: Pro vided
HV-EN (High Voltage Enable) Interlocking Function: Provided
Voltage Charging Function: Provided
Voltage Discharging Function: Provided
RS-232C Interface Conn ector: Provided
Remote Measurement Function: Provided

vi

Organization of This Operation Manual

This operation manual contains the following 10 sections.

1. PREPARATION BEFORE
This section describes precautions for unpacking and AC line voltage setting.

2. SPECIFICATIONS
This section describes the specifications for the SM-8200 Series super megohmmeters and

optional accessories.

3. OPERATING PRINCIPLE
This section describes the operating pri nciple with a block diagram of the SM-8200 Series.

4. FAMILIARIZATION WITH CONTROLS AND PARTS
This section describes the functions of the controls and parts on the front and rear panels.

5. PREPARATION FOR MEASUREMENT
This section describes the LCD display in detail for the measuring mode, setting mode and

operations. A variety of measured value display methods are also given.

OPERATION

6. MEASUREMENT

This section provides details for function setting, connection to the work to be measured, and

usage of a vari ety of opti onal measur ing jigs a nd el ectro des.

7. RS-232C INTERFACE
This section describes the application of the serial port interface.

8. REMOTELY CONTROLLED MEASUREMENT
This section describes the remote measuring function.

9. INTRODUCTION OF O PTIONALS
This section describes the optional accessories, including guard chips, DC signal outputs, and

others.

10. MAINTENANCE AND MISCELANEOUS

This section describes maintenance and calibration.

EXTERNAL APPEARANCE

11.

This sec tio n incl ude s fro nt, r ear an d sid e view illu strat ion s of th e inst rum ent w ith di men sion s.

vii

ＣＯＮＴＥＮＴＳ

1. PRE PA RAT IO N BE FO RE O PER AT ION . . . . . . . . . . . . . . . . . . . . . . . １

1. 1 Unpacking and Checking of the Contents . . . . . . . . . . . . . . . . . . . １

1. 2 Operating AC Line V oltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ２

1. 3 Setting the VOLTAGE SELECTOR Switches . . . . . . . . . . . . . . . . . . ２

1. 4 Checking the Fuse Amperage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ３

1. 5 Grounding the Chas sis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ４

1. 6 Wa rm-up Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ５

2. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ６

2.1 Measuring Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ６

2.2 Function Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . ７

2.3 Other Electrical and Physical Data . . . . . . . . . . . . . . . . . . . . ８

2.4 Optional Functions and Accessories . . . . . . . . . . . . . . . . . . . ８

2.5 List of Measurement Ranges and Guaranteed Accuracy

Ranges by Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ９

3. OPERATING PRINCIPLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . １２

4. FAM IL IAR IZA TIO N W ITH CON TR OLS AN D PA RTS . . . . . . . . . . . . . １３

4.1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . １３

4.2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . １５

4.3 Measuring Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . １７

4.4 Measuring Condition Setting Display . . . . . . . . . . . . . . . . . . １８

4.5 Meanings of the Status and Mode Notices. . . . . . . . . . . . . . . . １９

5. PREPARATION FOR A MEASUREMENT . . . . . . . . . . . . . . . . . . . . . ２０

5.1 Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ２０

5.2 Self-calibration 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ２１

5.3 Self-calibration 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ２１

5.4 Check the Measuri ng Rods

. . . . . . . . . . . . . . . . . . . . . . . . . . ２２

5.5 Basic Procedures for a Measurement. . . . . . . . . . . . . . . . . . . ２３

6. MEASUREMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ２４

6.1 Measuring Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ２４

6.2 Discharging Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ２５

6.3 Charging Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ２５

6. 4 In ter loc kin g F unc ti on – Usi ng the HV -EN Con ne cto r . . . . . . . . ２６

6.5 Comparison and Judgment Function . . . . . . . . . . . . . . . . . . . ２７

a

6.6 Setting a Variety of Functions . . . . . . . . . . . . . . . . . . . . . . . ２８

6.6.1 Setting the Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ２８

6.6.2 Setting the Comparison GO/NO Judgment Level . . . . . . . . . ２８

6.6.3 Setting Buzzer Sound ON/OFF . . . . . . . . . . . . . . . . . . . . . . ２９

6.6.4 Setting the Charging Time, Measu ring Time, Comparison

GO/NO Judging Level and Buzzer Sound ON/OFF. . . . . . . . . ２９

6.7 Changes in the Current Flowin g through Insulators. . . . . . . . . ３１

6.8 Connectivity Precautions. . . . . . . . . . . . . . . . . . . . . . . ３２

6.8.1 When the Screen Shows LOCK and Measurement Cannot Be Started . . .３２

6.8.2 When Using an Optional Electrode for Plate Samples or Shield Box . .３３

7. RS-232C INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ３４

7.1 RS-232C Communication Commands . . . . . . . . . . . . . . . . . . . ３４

7.2 Applications of Commands . . . . . . . . . . . . . . . . . . . . . . . . . . ３５

7.3 Connector Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . ３５

7.4 Printer Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ３６

8. REMOTELY CONTROLLED MEASUREMENT . . . . . . . . . . . . . . . . . ３７

9. INTRODUCTION OF OPTI ONS . . . . . . . . . . . . . . . . . . . . . . . . . . . ４０

9.1 DC Signal Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ４０

9.1.1 DC Output, RP-8000

– Directly proportional or linear to resistance . . . . . . . . . . ４０

9.1.2 DC Output, RI-8000

– Inversely proportional or 1/R to resistance . . . . . . . . . . ４２

10. MAINTENANCE AND MISCELANEOUS . . . . . . . . . . . . . . . . . . . . ４５

10.1 Periodical Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ４５

10.2 Storage, Transportation and Abando n . . . . . . . . . . . . . . . . . ４５

11. EXTERNAL APPEARANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ４６

b

1. PREPARATION BEFORE OPERATION

When plugging the shorting plug, make sure that the power is turned off, otherwise,

1.1 Unpacking and Chec king of the Conten ts

When you have received the carton of the SM-8200 Series super megohmm eter, carefully unpack

it, and take out every thing from the carton.

Although the instrument and its accessories are severely inspected before shipment from factory,

visual ly ch eck t he it ems a nd th eir q uanti ties .

Keep t he shi ppi ng ca rton for r euse a t a lat er st age.

1) Visually check the external view of the instrument and its accessories.

2) Check the qu anti ties o f the l ist in acco rdan ce wit h the f ollow ing l ist:

Table 1.1 List of Standard Accessories

Item Model No. Q’ty Remarks
Operation manual

Power cord
Measuring rod

(Red)

Measuring rod
(Black)

Shorting plug 0GZ00003 1

－
－

0GE00002 1

0GE00001 1

This item means this booklet.

1

Power cord with 3-prong plug with third

1

for grounding
A measuring rod with a 1­meter cord to be connected to the Rx ‘’
socket.
A measuring rod with a 1­meter cord to be connected to the Rx ‘+’
socket.
A plug to be plugged to the
HV-EN so cket of th e rear of
the inst rumen t. It i s plu gged
to the HV-EN socket when
shipping from factory.

Important!

When the accessory shorting plug is not plugged to the HV-EN socket on the rear of the

instrument, the measuring high voltage is not output.

Note: The shorting plug is plugged to the HV-EN socket when shipping from factory.

CAUTION

there i s an el ectr ic sh ock h azar d.

Upon checking the instrument and accessories, if any damage is found, immediately contact
your dealer or Hioki representative.

1

1.2 Operating AC Line Voltage

confirm that the VOLTAGE

SELECTOR switches on the rear panel are set to the positions, accordingly (See 1.3

The sup er megohmemet er c a n b e o p e ra ted fro m o ne of the f o llowin g A C power so u r c e w hen the

VOLTAGE SELECTOR switches are set accordingly.
AC Line Voltage
100 V ±10% 50/60 Hz
120 V ±10% 50/60 Hz
220 V ±10% 50/60 Hz
240 V +10V,  10% 50/60 Hz

CAUTION

1.3 Setting VOLTAGE SELECTOR Switches

The super megohmmeter can be operated from one of the AC line voltages of 100 V, 120 V, 220 V

Before connecting the power cord to the AC outlet socket,

Setting the VOLTAGE SELECTOR Switches.).

If the switches are set to wrong positions, a fire or burn may occur.

and 240 V by setting the VOLTAGE S ELECTOR switch es to the specific positio ns, respectively.

Frequency

Confirm the switch setting to the specific positions in accordance with Fig. 1.1.

If they are not set properly, correct their positions, accordingly.

To change the position of the switch, insert the tip of a flat blade screwdriver into the slot of the

switch lever, and slide the lever upward or downward.

CAUTION

To chan ge the V OLTA SGE SELE CTOR swit ch posi tio ns, be s ure t o
Unplug the po wer co rd pl ug fr om the A C li ne soc ket to preven t a
possible damage.
When th e swit ch po siti on is chan ged whi le t he vol tag e is on, the
Switch contacts will be damaged.

2

up and down. Slide the

Do not leave the lever at a neutral position. If the lever is set at a neutral position, a

When the VOLTAGE SELECTOR switch position is changed, fuse amperage must be

Time Lag Fuse

CAUTION

The VOLTAGE SELECTOR switches have two positions –
switch lever to either position until it stops.

normal function cannot be obtained, and it will cause a failure.

G

A

T

L

O

V

100V

120V

220V

240V

E

R

O

T

C

E

L

E

S

Fig. 1.1 VOLTAGE SELECTOR Switch Setting

CAUTION

changed to m eet th e requ irem ents of th e new AC lin e volt age.
Incorr ect fu se am pera ge wi ll ca use a f ailu re of t he in strum ent .

1.4 Checking the Fuse Amperage
The fuse holder of the instrument contains a time lag fuse of the following amperage:

AC Line Voltage
100 V/120 V 0.4 A
220 V/240 V 0.2 A

Fuse Amperage

3

To replace or check the fuse, make sure to disconnect the power cord from the AC line

To prevent an accident, connect the ground prong of the power cord

sure to connect

p

Fuse Replacement
The fuse is inserted in the FUSE holder (Fig. 1.2) on the rear of the unit.

Remove the cap, and replace the fuse with a new one with a correct amperage.
To remove the cap of the fuse holder, use a 4 mm Phillips screwdriver, and turn the cap

counterclockwise.

To set the cap in position, insert the cap, holding the fuse into the holder, and turn it with the

screwdriver.

Fuse

Fig. 1.2 Fuse Holder and Fuse Replacement

WARNING

socket. If not , ther e is a f ear of el ect rical shoc k.

Ca

1.5 Grounding the Chassis

To avoid an electr ical shock accid ent, connect the GND terminal on the rear of the unit to the

ground prong of the power cord to the ground post of the AC line system.
The round prong of the 3-prong plug o f the power cord is the grou nd prong.
It is recommended to use an AC line socket with its third contact grounded for connection of the

accessory 3-prong power cord.
To use the accessory 3-prong to 2-prong adapt er to connect the power cord to a 2-cont act AC line

socket, make sure to ground the green tab of the adapter.

WARNING

Plug to the ground post of the AC line system. If it is impossible to
ground the ground prong of the power cord plug, be
the GND terminal on the rear of the unit.

4

1.6 Warm-up Period

To obtain the performance of published specifications, allow the SM-8200 Series super

megohmmeter to warm for a minimum of 30 minutes.

5

2. SPECIFICATIONS

2.1 Measuring Performance

1) Electrical Resistance Measurement

SM-8213(RANGE : ×1 , ×10 , ×10

Measur em ent Ra nge (MΩ) [RANGE=×10

0.5 × 10R to 20 × 10R

0.25 × 10R to 10 × 10R

0.125 × 10R to 5 × 10R

0.075 × 10R to 3 × 10R

0.05 × 10R to 2 × 10R

0.025 × 10R to 1 × 10R

Accuracy of target voltage: ±3% of set value
Measuring output current: 50 mA maximum (Note: 1)
Accuracy of measurement: ±10% (A range of 10 times of the minimum
value of each range) (Note: 2)

SM-8215(RANGE : ×1 , ×10 , ×10

Measur em ent Ra nge (MΩ) [RANGE=×10

5 × 10R to 200 × 10R

2.5 × 10R to 100 × 10R

1.25 × 10R to 50 × 10R

0.5 × 10R to 20 × 10R

0.25 × 10R to 10 × 10R

Accuracy of target voltage: ±3% of set value

2

, ×103 , ×104 , or ×105)

R

]

Target Voltage

100 V
50 V
25 V
15 V
10 V
5 V

2

, ×103 , ×104 , or ×105)

R

]

Target Voltage

1000 V

500 V
250 V
100 V

50 V

Measuring output current: 2 mA maximum (Note: 1)
Accuracy of measurement: ±10% (A range of 10 times of the minimum
value of each range) (Note: 2)

2

SM-8220(RANGE : ×1 , ×10 , ×10

Measur em ent Ra nge (MΩ) [RANGE=×10

5 × 10R to 200 × 10R

2.5 × 10R to 100 × 10R

1.25 × 10R to 50 × 10R

0.5 × 10R to 20 × 10R

0.25 × 10R to 10 × 10R

0.125 × 10R to 5 × 10R

0.05 × 10R to 2 × 10R

, ×103 , ×104 , ×105 , ×106 , ×107 , or ×108)

R

]

Target Voltage

1000 V
500 V
250 V
100 V
50 V
25 V
10 V

Accuracy of target voltage: ±3% of set value
Measuring output current: 2 mA maximum (Note: 1)
Accuracy of measurement: ±10% (A range of 10 times of the minimum

8

value of each range) except for×10
±20% for×10

8

range

range. (N ote: 2)

6