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TECHNICAL BULLETIN PPE-5034.E
Calibration Unit for Testers
Installation, Operation and Maintenance
Operation
COMBO TESTER
Testing the Wrist Strap Circuit
1. Plug one of the included test leads into the black
banana jack labeled “E” on the Calibration Unit.
Connect the opposite end of the test lead into the
yellow banana jack labeled “WRIST STRAP” on the
Combo Tester. Toggle the switch to the “WRIST
STRAP” position.
Figure 1. Charleswater 99090 Calibration Unit
Description
The Charleswater 99090 Calibration Unit is designed to
verify whether a tester is operating within specifications.
The 99090 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 at 750K - 35M.
The Charleswater Calibration Unit is calibrated to NIST
traceable standards.
The Charleswater 99090 Calibration Unit is to be used
with the following items:
Item Description
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
Figure 2. Connecting the test lead from banana jack “E”
on the Calibration Unit to the WRIST STRAP banana
jack on the Combo Tester
2. Connect the second test lead to the red 675K
banana jack labeled “A” on the Calibration Unit.
Touch the opposite end of the test lead to test plate
on the Combo 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 Combo 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
Point
Resistance
Value
A 675K FAIL LOW
B 825K PASS
C 35M PASS
D 40M FAIL HIGH
Made in the
United States of America
Test Output
PPE-5034.E Page 1 of 2
Unit 17. Millbrook Business Park, Sybron Way • Crowborough, East Sussex TN6 3JZ United Kingdom
Phone: 00 44 (0) 1892-665313 • Internet: Charleswater.co.uk
August 2015
© 2015 Charleswater
Page 2
Figure 3. Verifying the calibration of the wrist strap
circuit in the Combo Tester
Testing the Footwear Circuit
1. Plug one of the included test leads into the black
banana jack labeled “E” on the Calibration Unit.
Connect the opposite end of the test lead into the
yellow banana jack labeled “FOOT PLATE” on the
Combo Tester. Toggle the switch to the “FOOT
PLATE” position.
Figure 4. Connecting the test lead from banana jack “E”
on the Calibration Unit to the FOOT PLATE banana jack
on the Combo Tester
2. Connect the second test lead to the red 675K
banana jack labeled “A” on the Calibration Unit.
Touch the opposite end of the test lead to test plate
on the Combo Tester and press down to activate
the test. Be sure not to touch the banana plug or
test plate with your skin.
Figure 5. Verifying the calibration of the footwear circuit
in the Combo Tester
Specifications
Accuracy:
±5%
Dimensions:
8.1 cm x 11.2 cm x 2.3 cm
Weight:
.1 kg
Limited Warranty, Warranty Exclusions, Limit of
Liability and RMA Request Instructions
See Charleswater’s Warranty -
http://www.charleswater.co.uk/LimitedWarranty.aspx
3. Observe the response from the Combo 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
Point
Resistance
Value
Test Output
A 675K FAIL LOW
B 825K PASS
C 35M PASS
D 40M FAIL HIGH
Unit 17. Millbrook Business Park, Sybron Way • Crowborough, East Sussex TN6 3JZ United Kingdom
PPE-5034.E Page 2 of 2
Phone: 00 44 (0) 1892-665313 • Internet: Charleswater.co.uk
© 2015 Charleswater
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