Operation, Installation and Calibration Instructions
N.I.S.T. Calibration Unit for Wrist Strap and Footwear Testers
Calibration Test Procedures
The calibration unit was specifically
designed for use in calibration of ESD
Systems.com brand test equipment.
The following step by step procedures
will cover calibration for specific test
units. The procedures will not cover
adjustment of the test equipment. For
detailed information regarding adjust-
ment of specific ESD Systems.com
brand testers contact our Customer
Service Department at (508) 485-7390.
CALIBRATION OF THE
MODEL 41193 WRIST STRAP
TESTER
Step 1: Connect one of the test leads
to common point banana jack labeled
"E" on 41230. Connect the opposite
end of test lead to one of the 41193’s
ground jacks located on the front edge
of the unit.
PS-2006 07/05 Page 1 of 2
Figure 1. 41230 Calibration Unit
Description
The ESD Systems.com model 41230
calibration unit is designed to simplify
the process of calibrating wrist strap
and footwear test equipment. The
calibration unit allows the user to
quickly and easily verify whether a
tester is operating within specifica-
tions. The 41230 is a passive device,
and requires no power source. The
calibration unit is manufactured within
industry accepted test ranges for both
wrist straps and footwear. The wrist
strap pass range is set at 750 Kilohm -
10 Megohm, while the footwear test
range is set at 750 Kilohm -
100 Megohm. The 41230 is supplied
calibrated to NIST traceable standards.
Installation
Remove the calibration unit from the
carton and inspect for shipping
damage. Each unit should include the
following:
1 - Calibration unit, item #41230
2 - 12'' test leads
Figure 2. Connecting test lead common
from 41230 to 41193.
Step 2: Connect the second test lead
to the 675 Kilohm jack labeled "A" on
41230. Touch the opposite end of test
lead to the test plate. Observe the
LED's for the proper response as
indicated below. Be sure to hold the
cord at an insulated point, so that the
resistance value is not affected by the
body.
Resistance Value Test Output - LED
(In Ohms)
Red jack “A” - 675K: Red (Low - hazard)
Green jack “B” - 825K: Green (OK - in limits)
Green jack “C” - 8.5M: Green (OK - in limits)
Yellow jack “D” - 11.5M: Red (High resistance)
Step 3: Repeat the procedure testing
across jacks B, C, and D. The different
resistance ranges should give the
display shown above. If the tester does
not meet calibration specifications,
contact factory for adjustment infor-
mation, or ask for Tech Brief PS-2055.
Figure 3. Testing 41193 for “PASS” and
“FAIL” ranges as indicated on
calibration unit.
Tech Brief
© 2005 DESCO INDUSTRIES INC.
Employee Owned
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