Desco 19250 Operation, Installation, And Maintenance Manual

Tester, Combination, 3-State
Operation, Installation and Maintenance
Pass Range 750K - 10M and 750K - 100M
Figure 1. Desco 19250 Combo Tester

Description

The Desco 19250 Combo Tester is a 3-state touch tester 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 19250 is equipped with a 750 Kilohm - 10 Megohm
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 19250 is very simple to operate. A green
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.
Model Description
19250 Combo Tester, 9 Volt battery
19253 Combo Tester w/ Footplate
19252 Combo Tester w/ Stand
98273 Foot Plate for Combo Tester
98254 Stand for Combo Tester
98256 AC Adapter, 120V
98257 AC Adapter, 220V
CAUTION: Use only the AC adapter designed for this unit:
Item 98256 (120 volt) or Item 98257 (220 volt). Using any other
adapters may damage the unit and void the warranty.
DESCO EAST - 90 Hudson Road, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site: http://www.desco.com
TB-2040 12/01 Page 1 of 4
TECHNICAL BULLETIN TB-2040
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449

Inspection

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 Wall poster
1 5/32" hex wrench
1 9 volt battery
Model numbers 19253 and 19252 are ideally suited for testing foot
grounding devices.

Installation of Model 19250

The Combo Tester may be used as a portable unit, or may be
permanently mounted on either a table or a wall. Please refer to
the following instructions when installing your tester.

Stationary Installation

If you will be using the tester as a portable unit, you may prefer to
mount the unit to a table or wall. Three keyhole slots on the back
of the unit are included to allow you to attach the tester to a
stationary surface.
Figure 2. Mounting hole locations.
1. Select location for mounting Tester. Install three #6 or #8 screws
spaced as illustrated in figure 3, into a wall or other vertical
surface. Make sure that the screw heads do not project out more
than 1/4" from mounting surface. The template on page four is
actual size.
2. Mount the Tester on the screws, pulling down to lock it in place.
Made in America