19253 Desco, 19253 Datasheet

TESTER COMBO WS&FS W/ PLATE

19253

Manufacturer Part Number
19253
Description
TESTER COMBO WS&FS W/ PLATE
Manufacturer
Desco
Type
Testerr
Datasheet
1.19253.pdf (6 pages)

Specifications of 19253

Features
Base Plate
Power Supply Type
Battery (Optional AC Adapter)
For Use With/related Products
Wrist Straps, Foot Plate
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
16-1098
19253
TB-2040 October 2009 Page 1 of 6
Combo Wrist Strap / Footwear Tester
Installation, Operation and Maintenance
Pass Range 750K - 10M and 750K - 100M
Figure 1. Desco 19250 Combo Tester
Description
The Desco
designed for fast, frequent testing of ESD personnel grounding
devices. This product can be used as one of the tools to fulfill the
ANSI ESD S20.20 paragraph 6.1.3.2 “Compliance Verification
Plan. Verification should include routine checks of the Technical
Requirements of the Plan.” The Combo Tester incorporates a
unique dual test circuit design which improves accuracy of testing
and eliminates the need for separate wrist strap and foot grounder
test units. The
circuit, ideal for testing of wrist straps and a 750 kilohm - 100
megohm circuit designed for accurate testing of footwear.
Test parameters are factory set but can be adjusted to match your
own specifications. The
light signals the user that everything is OK. A red light and an
audible indicator means that the circuit resistance is either too low
or too high.
The Tester operates on either a 9 volt battery or a special AC
adapter. The Combo Tester is calibrated to NIST traceable
standards and is available in three models.
CAUTION: Use only the AC adapter designed for this unit:
Item 98256 (120 volt) or Item
adapters may damage the unit and void the warranty.
Per ESD Handbook ESD TR20.20 paragraph 5.3.2.4.4 Test
Frequency “Typical test programs recommend that wrist straps
that are used daily should be tested daily. However, if the products
that are being produced are of such value that knowledge of
a continuous, reliable ground is needed, and then continuous
monitoring should be considered or even required.”
Model
19250
19253
19252
98273
98254
98256
98257
19250
Description
Combo Tester, 9 Volt battery
Combo Tester w/ Footplate
Combo Tester w/ Stand
Foot Plate for Combo Tester
Stand for Combo Tester
AC Adapter, 120V
AC Adapter, 220V
19250
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Website:
Combo Tester is a 3-state touch tester
is equipped with a 750 kilohm - 10 megohm
19250
TECHNICAL BULLETIN TB-2040
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449
98257
is very simple to operate. A green
(220 volt). Using any other
Per ESD SP9.2 APPENDIX B - Foot Grounder Usage Guidance
“Compliance verification should be performed prior to each use
(daily, shift change, etc.). The accumulation of insulative materials
on the FCS may increase the foot grounder system resistance. If
foot grounders are worn outside the ESD protected area testing for
functionality before reentry to the ESD protected area should be
considered.”
Per ESD SP9.2 APPENDIX C -Parallel Ground Paths
“A parallel ground path allows a flow of electrical current through a
path that is not intended for the test. Parallel ground paths may be
caused by several different situations.
For example:
a. The path represented by the person standing with one shoe on
b. The path presented by a person inadvertently supporting
c. The path represented by a person leaning against another
Packaging
Remove the Tester from the carton and inspect for damage.
Items included with model 19250:
1 Combo Tester
1 9 volt battery
Items included only with model 19253:
1 Combo Tester
1 Foot plate
1 Ground cord
1 9 volt battery
Items included only with model 19252:
1 Combo Tester
1 Base plate
1 Pedestal tube with bracket and boot installed
1 4” banana plug connector
1 Vinyl insulator cap
1 Wall poster
1 5/32” hex wrench
1 9 volt battery
Model numbers
grounding devices.
the floor and the other shoe on the test apparatus. A parallel
path may be created by the shoe on the floor. Current from the
test instrument is then directed down two paths when it was
intended to be directed down one. The correct path for the test
is with one shoe in the air or on an insulating surface and the
other shoe on the test plate.
themselves by means of one hand on another object such as
a wall, table or supporting member in order to measure the
resistance in one foot contact. The hand has created a parallel
path to ground.
object with other parts of the body in order to provide physical
support during a testing sequence. This can then lead to other
grounding paths and erroneous results.”
19253
and
19252
are ideally suited for testing foot
Desco.com
© 2009 DESCO INDUSTRIES INC.
Made in America
Employee Owned

19253 Summary of contents

Page 1

... Packaging Remove the Tester from the carton and inspect for damage. Items included with model 19250: 1 Combo Tester 1 9 volt battery Items included only with model 19253: 1 Combo Tester 1 Foot plate 1 Ground cord 1 9 volt battery Items included only with model 19252: ...

Page 2

... If the floor is an ESD floor, placing the other foot on the floor may result in erroneous test results. Care should also be taken not to create (hand resting on wall or bench) other paths-to-ground. 19250 can be used to 19253 and 19252 19250 19253 or 19252 Desco.com © 2009 DESCO INDUSTRIES INC. Employee Owned ...

Page 3

... CORD” jack. V. Press the test button so that the unit activates. Hold for 2-3 seconds. Figure 7. Testing foot grounding devices with 19253. VI. Lighting of the green “PASS” LED indicates that the foot ground assemblies are functioning properly. V. ...

Page 4

... DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Website: TB-2040 Page Calibration The models 19250, 19253, and 19252 are calibrated to NIST traceable standards. We recommend that calibration is performed annually to ensure that the Tester is operating within limits ...

Page 5

... VIII. Re-check to insure that all ranges are correct, then proceed to calibrate footwear ranges. DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Website: TB-2040 Page TABLE 1 - STANDARD RANGES ...

Page 6

... COMBO TESTER ACTUAL SIZE DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Website: TB-2040 Page Limited Warranty Desco expressly warrants that for a period of one (1) year from the date of purchase, Desco Combo Testers will be free of defects in material (parts) and workmanship (labor) ...