19240 Desco, 19240 Datasheet - Page 2

• Manufacturer Part Number: 19240
• Description: WRISTSTRAP TESTER 9V OPERATION
• Manufacturer: Desco
• Type: Testerr

Specifications of 19240

• Features: Single Wire Wrist Strap
• Power Supply Type: 9V Battery
• For Use With/related Products: Wrist Straps
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 16-1089

TB-3017 Page 2 of 2
Calibration
We recommend annual calibration of our testers. The model
19240 is calibrated to NIST traceable standards. Calibration
may be performed to ensure that the tester is operating
within limits.
If you are familiar with the procedure, the following resistance
should give the display shown:
Resistance Value (±1%)
750 Kilohms:
850 Kilohms:
9
11 Megohms:
Procedure
Connect the test resistance from the banana jack to the test
button. With resistance applied and test button pressed,
display should yield proper output. Make sure test clips are
insulated from users hands.
A unit failing the calibration test will need to be returned to
the manufacturer.
ESD Handbook TR 20.20 paragraph 5.3.2.4.2 Additional
User Wrist Strap Testing, “Proper testing of the wrist strap
includes the resistance of the groundable point on the end
of the cord, the cord itself, the resistor, the cord-to-cuff snap
connector, the resistance of the interface of the cuff, the cuff/
wrist interface, and the resistance of the person between the
wrist and the hand that contacts the test electrode. Typically,
the maximum acceptable resistance most often used for wrist
strap grounding is less than ten megohms.”
The lower limit is to verify that 1 Megohm ±20% current
limiting resistor is in the resistance. Typically, the minimum
acceptable resistance most often used for wrist strap
grounding is greater than 800 Kilohms (Ref: ANSI/ESD
S20.20 Table 1).
Megohms:
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Web Site:
Test Output
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]
Red (Low-hazard)
Green (OK-in limits)
Green (OK-in limits)
Red (High resistance)
LIMITED WARRANTY
Desco expressly warrants that for a period of one (1)
year from the date of purchase, Desco Wrist Strap
Testers will be free of defects in material (parts) and
workmanship (labor). Within the warranty period, a
unit will be tested, repaired or replaced at Desco’s
option, free of charge. Call Customer Service at
909-627-8178 (Walnut, CA) or [phone]
(Canton, MA) for a Return Material Authorization
(RMA), and proper shipping instructions and address.
You should include a copy of your original packing
slip, invoice, or other proof of purchase. Any unit
under warranty should be shipped prepaid to the
Desco factory. Warranty replacements will take
approximately two weeks.
WARRANTY EXCLUSIONS
THE FOREGOING EXPRESS WARRANTY IS
MADE IN LIEU OF ALL OTHER PRODUCT
WARRANTIES, EXPRESSED AND IMPLIED,
INCLUDING MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE WHICH ARE
SPECIFICALLY DISCLAIMED. The express
warranty will not apply to defects or damage due
to accidents, neglect, misuse, alterations, operator
error, or failure to properly maintain, clean or repair
products.
LIMIT OF LIABILITY
In no event will Desco or any seller be responsible
or liable for any injury, loss or damage, direct or
consequential, arising out of the use of or the
inability to use the product. Before using, users
shall determine the suitability of the product for their
intended use, and users assume all risk and liability
whatsoever in connection therewith.
Desco.com
© 2009 DESCO INDUSTRIES INC.
Employee Owned