19350 Desco, 19350 Datasheet - Page 2

• Manufacturer Part Number: 19350
• Description: TESTER W/S 2 STATE TOUCH NIST
• Manufacturer: Desco
• Type: Testerr

Specifications of 19350

• Features: Touch Tester
• Power Supply Type: 120V AC
• Range: 750 Kiloohms to 10 Megohms
• Tester Type: Touch Tester
• Voltage, Rating: 120 V
• For Use With/related Products: Wrist Strap & Table Mat
• Lead Free Status / RoHS Status: Not applicable / Not applicable

TB-2004 Page 2 of 3
Figure 5. Attachment alternatives
Figure 6. AC Adapter, 220 Volt
Figure 7. Ground points
A wrist strap is plugged into one of the banana jacks or into any
common grounding point. When the wearer of a wrist strap touches
the metallic test surface, the green “test good” LED will light if
the operator-to-ground resistance is between 750k ohms and 10
megohms.
Proper Ground
The integrity of the utility ground must be tested before the Touch
Tester is plugged in. The Touch Tester utilizes the “green wire”
ground as the static ground. Each outlet must be tested for proper
grounding prior to use. Outlets can become ungrounded over time
due to corrosion, wear, or vibration.
Desco recommends our model 98130 AC Outlet Analyzer & Wrist
Strap Tester when testing electrical outlets for proper grounding
and wiring. For detailed information on the 98130, ask for Technical
Bulletin TB-2099.
Operation
When the Touch Tester’s power supply is plugged into a grounded
outlet the red LED will be on, indicating that the unit is powered. The
utility ground is internally connected to the .395” (10mm) snap stud
on the back of the unit and to the 2 banana jacks at the bottom edge
of the tester.
IEC Input
10mm
Snap Stud
DESCO EAST -
CONNECTOR
FOR P-6911
AC ADAPTER
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]
One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Web Site: Desco.com
SNAPS
HOOK & LOOP
FASTENER
GROUND
POINTS
ATTACHMENT
ALTERNATIVES
Banana
Jacks
DC Output
Figure 8. Accessing the audible signal
Calibration
We recommend annual calibration of our testers. The model
calibrated to NIST traceable standards. Calibration may be performed
to ensure that the tester is operating within limits.
Desco offers a calibration unit that is specifically designed to simplify
the calibration procedure. This unit is sold as item #07010. The
comes calibrated to NIST traceable standards. Ask for Technical
Bulletin TB-2039 for detailed procedure to calibrate the 19350. If you
are familiar with the procedure, the following resistance should give
the display shown:
Resistance Value (±1%)
675 Kilohms:
825 Kilohms:
8.5 Megohms:
11.5 Megohms:
Figure 9. Calibration of tester
Audible Option
If desired, the Touch Tester will augment the visual “test good”
indicator with an audible signal. In the “on” position, the tester will
beep when the green “test good” LED is on, thereby allowing the
operator to frequently test the wristband and cord without having to
look at the tester.
To enable/disable the signal, a slide switch is accessible through the
hole on the back of the unit. First, unplug the power supply. Actuate
the switch with a small probing tool, being careful to avoid internal
damage.
Test Output
Red (Low-hazard)
Green (OK-in limits)
Green (OK-in limits)
Red (High resistance)
© 2011 DESCO INDUSTRIES INC.
19350
07010
Employee Owned
is