TB-9017
Page 5 of 6
© 2022 DESCO INDUSTRIES INC
Employee Owned
SCS
- 926 JR Industrial Drive, Sanford, NC 27332
East: (919) 718-0000 | West: (909) 627-9634 • Website:
Test Procedure for Resistance Point to Point
A. Complete BATTERY TEST and CONTINUITY TEST.
If required clean electrodes as described in Test
Weight Cleaning section below.
B. Before testing new floor mats or newly installed
floors, clean mats/floors per manufacturer’s
recommendations. For testing of floor finishes or
monitoring of existing floor materials, test in an as-is
condition.
C. Perform tests at ambient humidity.
D. Place the Megohmmeter and test weight at the
desired test location.
E. Connect test leads of the meter to the test weights.
F. Set meter to 100V. Place test weights three feet
apart on the surface of the material being tested.
G. Push test button and record the resistance after the
measurement has stabilized or after 15 seconds.
Release test button.
H. Repeat the procedure placing the test weights three
feet apart on the surface at different locations.
I. Perform a minimum of five tests per contiguous floor
surface material or a minimum of five tests per 5,000
square feet (464.5 m2) of floor material, whichever is
greater. A minimum of three of the five tests should
be conducted in those areas that are subject to wear
or have chemical or water spillage or are visibly dirty.
Maintenance
Battery Replacement
Before attempting to replace battery, place main selector
switch in the OFF position.
The circuitry enclosed in the SCS 701 Analog Surface
Resistance Megohmmeter Kit produces high voltages.
Make sure that the main selector switch is in the OFF
position before removing the back cover.
1. To open the back cover, remove the screw located in
the center of the back cover.
2.
The batteries are held in place by a metal bracket at
the top of the Megohmmeter. To release this bracket,
turn the screw located in the center of the bracket
counter clockwise until the bracket swings free. The
batteries will now slide out.
3. Install new batteries as shown in Figure 9. Note:
Improper battery installation will damage the
Megohmmeter.
4. Replace bracket and tighten bracket screw. Replace
back cover and cover screw.
Batteries (2)
1.5 volt AA Cell,
3.6 volt AA Cell Lithium
Recommended Batteries: Model TL-5903 TADIRAN,
ER6 Maxell, Saft LS 14500, Zeus ER14505
Cleaning the 5 lbs. Electrodes
Caution: The test probes included in this kit are heavy.
Exercise care in handling. After a period of use, the
conductive rubber pads on the test weights may become
soiled, causing the weight to fail the CONTINUITY TEST.
To clean the surface of the conductive pad, use a 70%
Isopropyl alcohol/water mixture on a clean low-linting
cloth. Allow surface to “air dry” 15 minutes before use.
Zero Adjustment
On occasion, due to handling, vibration, or other causes,
the pointer on the Megohmmeter may need adjustmen
To zero the pointer, turn the main selector switch to the
OFF position. Place the Megohmmeter on a level stable
surface and turn the mechanical zero adjust screw until
the pointer is over the left most mark on the OHMS
scale.
Calibration
Frequency of recalibration should be based on the
critical nature of those ESD sensitive items handled and
the risk of failure for the ESD protective equipment and
materials. In general, SCS recommends that calibration
be performed annually.
In-house calibration can be performed by using ±1%
tolerance resistors in each of the meter’s decade
ranges. Connect the resistors to the test leads using
clips and record the meter’s display. Minimize crossing
the test leads when possible. Contact
should adjustments be necessary. Special
equipment is required to adjust the meter.
Required Equipment
•
Digital Multimeter (±1.25% accuracy @10VDC and
100VDC)
• Resistance Decade Box with a range of 10
⁵
to 10
11
ohms (±5% accuracy)
•
99% Isopropyl Alcohol and Cleaning Wipes
2021
Figure 9. Replacing the batteries