Desco Europe Charleswater 99090 Installation, Operation And Maintenance

Calibration Unit for Testers

Installation, Operation and Maintenance
Figure 1. Charleswater

Description

The Charleswater 99090
verify whether a tester is operating within specifications.
The Calibration Unit is a passive device and requires
no power source. The Calibration Unit is manufactured
with industry accepted test ranges for both wrist straps
and foot grounders. Both the wrist strap and footwear
pass range is set to 750K to 35M. The Charleswater
Calibration Unit is calibrated to NIST traceable
standards.
The Charleswater 99090
with the following items:
Item Description
225221 Portable Wrist Strap Tester
99037 Combo Tester
99038 Combo Tester with Stand and Foot Plate
Packaging
1 Calibration Unit
2 Test Leads with Banana Plug Terminals
1 Certificate of Calibration
PPE-5034.E Page 1 of 3 July 2018
TECHNICAL BULLETIN PPE-5034.E
99090 Calibration Unit
Calibration Unit is designed to
Calibration Unit is to be used
DESCO EUROPE - 2A DUNHAMS LANE, LETCHWORTH, HERTFORDSHIRE, SG6 1BE, UK
Phone: +44 (0) 1462 672005 • E-mail: Service@DescoEurope.com, Website:

Operation

WRIST STRAP TESTER

1. Plug one of the included test leads into the black
banana jack labelled "E" on the Calibration Unit.
Connect the opposite end of the test lead into the
yellow banana jack located on the
Wrist Strap Tester.
Figure 2. Connecting the test lead from banana jack
"E" on the Calibration Unit to the banana jack on the
Portable Wrist Strap Tester
2. Connect the second test lead to the red 675K
banana jack labelled "A" on the Calibration Unit.
Touch the opposite end of the test lead to test
plate on the Wrist Strap Tester and press down to
activate the test. Be sure not to touch the banana
plug or test plate with your skin.
3. Observe the response from the Portable Wrist Strap
Tester. The alarm should sound, and the LOW LED
should illuminate red.
4. Repeat the procedure for test points B (825K), C
(35M) and D (40M). The expected test results can
be found in the following table:
Test Resistance
Point Value
A 675K
B 825K
C 35M
D 40M
DescoEurope.com
Made in the
United States of America
225221 Portable
Tester Buzzer
LED
FAIL LOW ON
PASS OFF
PASS OFF
FAIL HIGH ON
© 2018 DESCO INDUSTRIES INC
Employee Owned