TB-3066
Page 7 of 8
© 2017 DESCO INDUSTRIES, INC.
Employee Owned
DESCO WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST
- One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website:
Desco.com
Figure 13. EMIT 50424 Limit Comparator
Calibration
The Combo Tester X3 is calibrated to standards
traceable to NIST. 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, we
recommend that calibration be performed annually.
The accuracy of the Combo Tester X3 is specified as:
±20% for 1 gigohm footwear test limit
±10% for all other test limits
A periodic check using a precision resistance box can
be used to verify proper operation.
The EMIT
50424
Limit Comparator is available for the
convenient calibration of the Combo Tester X3.
The Limit Comparator allows the customer to perform
NIST traceable calibration on the Combo Tester X3. The
Limit Comparator can be used on the shop floor within
a few minutes, virtually eliminating downtime, verifying
that the Combo Tester X3 is operating within tolerances.
See
TB-6581
for more information.
Figure 12. Using the 19279 Combo Tester X3 with Stand
Maintenance
To maintain optimum performance, cleaning should be
performed on a regular basis. Use a minimum of 80%
Isopropyl alcohol to clean the foot plate and test switch.
Other cleaners are susceptible to leaving residue on
these surfaces.
