• If damage is suspected, check the "Before Returning for Repair" section
before contacting your dealer or Hioki representative.
• Use the original packing materials when transporting the device, if possible.
Cleaning
To clean the device, wipe it gently with a soft cloth moistened with water or mild
detergent. Never use solvents such as benzene, acetone, ether, ketones, thin-
ners or gasoline, as they can deform and discolor the case. Clean the electrode
rubber with industrial-use ethanol (use a concentration of at least 95%).
About electrode rubber
Removing and reattaching the electrode rubber
• The electrode rubber can be removed by gripping it carefully so as not to
scratch it and pulling it off.
• The electrode rubber has a top and a bottom. Check for proper orientation
before reattaching it. The surface that makes contact with the measurement
target is thinner, while the surface that makes contact with the metal portion
of the SM9001 is thicker.
• Gently insert the electrode rubber and then fit it tightly against the metallic
surface by pushing it against a level base such as the counter-electrode.
Contact your dealer or Hioki representative if:
• The electrode rubber no longer covers the adjacent metal
• The electrode rubber exhibits visible damage
• The electrode rubber is excessively dirty and efforts at cleaning prove to be
ineffective
Before Returning for Repair
If abnormal operation occurs, check the following items.
The SM9002 Verification Fixture for Surface Resistance Measurement is a sys-
tem verification fixture for use in measuring surface resistance as required by
Section 8.4 of JIS C 2170:2004 (IEC 61340-2-3:2000). The SM9002 is an option
designed specifically for use with the SM9001 and cannot be used for system
verification of other devices.
General Specifications
Measurement functionality
The following describes how the fixture is used in a typical application. Custom-
ers needing to perform a rigorous verification process that complies with JIS C
2170:2004 should be sure to check the actual JIS document.
Low-resistance measurement
If the acquired resistance values are both within 5% of 500 k
Ω
, then the system
is operating properly.
High-resistance measurement
Maintenance and Service
Symptom
Check Items
Solution
The resistance value is
abnormal.
Are the terminals con-
nected properly?
Connect the terminals
securely.
Has the short bar been
connected properly?
Connect the short bar to
the proper pair of termi-
nals for the type of mea-
surement you intend to
perform.
Is the electrode rubber
dirty?
Clean the electrode rub-
ber.
SM9002
Verification Fixture for Surface
Resistance Measurement
Specifications
Operating environ-
ment
Indoors, altitude up to 2000 m (6562 feet),
Pollution degree 2
Operating tempera-
ture and humidity
18°C to 28°C (64.4°F to 82.4°F), 60% RH or less.
(non-condensing)
Storage tempera-
ture and humidity
-10°C to 50°C (14°F to 122°F), 80% RH or less.
(non-condensing)
Dielectric strength
Between electrodes (together) and SM9002 enclosure:
1120 V DC, for 15 seconds
Electrode structure
High-resistance : Chrome-plated metal (brass)
Low-resistance : Gold-plated copper cladding formed on
PC board
Dimensions
Approx.
100×56H mm (
3.94” × 2.20”H)
Mass
Approx. 300 g (10.6 oz.)
Product warranty
period
3 years
Measurement items
Low-resistance measurement
Resistance measurement electrodes connected to a measuring
instrument are secured to the inspection fixture, and a judgment
is made concerning whether the system is functioning properly.
(Test voltage: 10 V DC)
Verification consists of a series of repeated measurements
while varying the phase position of the fixture and electrodes by
90°.
High-resistance measurement
Resistance measurement electrodes connected to a measuring
instrument are secured to the inspection fixture, and a judgment
is made concerning whether the system is functioning properly.
(Test voltage: 100 V DC)
Circuit design
Low-resistance measurement
The circuit consists of contact electrodes arranged in a radial
pattern at the center and ring measurement electrode positions
and twenty 10 M
Ω
±1% resistors placed at an even interval.
The circuit forms a 500 k
Ω
±1% parallel connection.
High-resistance measurement
The circuit consists of contact electrodes placed at the center
and ring measurement electrode positions and one 1 T
Ω
±5%
resistor.
Maximum rated volt-
age to earth
100 V DC
Appearance
Using the fixture
• Some Super Megohm Meter models are capable of generating a terminal-
to-ground voltage of 1,000 V, but the SM9002 is rated for a maximum ter-
minal-to-ground voltage of 100 V.
• Check the SM9002 test surface and the SM9001 electrode rubber for dirt,
foreign matter, scratches, or other impediments to proper operation.
• While performing measurement, avoid contact with the SM9001. Avoid
subjecting the SM9001 to excessive force by pulling on or twisting cables.
• Due to the delicate nature of the contact with the SM9001, you may obtain
out-of-range measured values even if the product is operating properly if
the SM9001 has not been placed on the surface from directly above.
Remove and then reposition the SM9001 if the value is out of range.
• If unable to obtain stable measurement results, clean the surface of the
SM9001's electrode rubber and the SM9002 test surface with industrial-
use ethanol (use a concentration of at least 95%). If cleaning fails to yield
improvement, remove the SM9001's electrode rubber and clean the entire
unit with industrial-strength ethanol (use a concentration of at least 95%).
For more information, see "Removing and reattaching the electrode rub-
ber."
• Place the SM9002 on a level surface.
• The SM9002 should be stored in a pouch inside the SM9001's included
carrying case.
• Do not touch the test surface or get it dirty.
High-resistance test surface
Low-resistance test surface
Flip over
1.
Connect the short bar to the surface resistance measurement [Rs] terminals
(common terminal [gray] and output terminal [red]).
2.
Gently place the SM9001 on the SM9002's low-resistance test surface, low-
ering it from directly above.
3.
Apply 10 V and read the resistance value after 15 sec.
4.
Stop applying the voltage. Lift up the SM9001 and rotate the SM9002 90°.
5.
Repeat steps (
3
) and (
4
) until the SM9002 has been rotated through 360°.
1.
Connect the short bar to the surface resistance measurement [Rs] terminals
(common terminal [gray] and output terminal [red]).
2.
Gently place the SM9001 on the SM9002's high-resistance test surface, low-
ering it from directly above.
3.
Apply 100 V and verify that a stable resistance value of 1 T
Ω
±5% is obtained.
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