DESCO TB-3074 Wave Distortion Monitor Verification Tester

Description

The Desco 98221 Wave Distortion Monitor Verification Tester is used to perform periodic test limit verification of Desco Wave Distortion Monitors. Verification may be accomplished without removing the monitor from its workstation. The Wave Distortion Monitor Verification Tester is National Institute of Standards and Technology (NIST) traceable. Frequency of verification is based on the critical nature of the ESD susceptible items handled. Desco recommends annual calibration of workstation monitors and the Wave Distortion Monitor Verification Tester.

Desco Single-Wire Wave Distortion Continuous Monitors are defined in ESD TR1.0-01-01 as impedance continuous monitors. Most metrology departments or companies specializing in calibration will not have the specialized test equipment needed for the calibration or verification of wave distortion continuous monitors. The Desco 98221 Wave Distortion Monitor Verification Tester meets ANSI/ESD S20.20 and Compliance Verification ESD TR53.

The Desco 98221 Wave Distortion Monitor Verification Tester can be used with the following items:

Item	Description
19239	Mini Monitor
19243	Mini Monitor
19651	Multi-Mount Monitor
19652	Multi-Mount Monitor
19246	Dual Operator Continuous Monitor
19247	Dual Operator Continuous Monitor
19321	Full-Time Continuous Monitor
19322	Full-Time Continuous Monitor

Packaging

• 1 Wave Distortion Monitor Verification Tester 1 09700 Alligator Clip
• 1 09782 10mm Stacking Snap
• 1 09838 Ground Plug Adapter
• 1 Banana Plug Wire Adapter, 5″
• 1 Ground Extension Cord, 5′
• 1 Certificate of Calibration

Features and Components

• A. Mat Test Lead: Connect to the monitor’s mat terminal to verify its mat test circuit.
• B. Ground Lead: Connect to equipment ground to provide a ground reference for the Wave Distortion Monitor Verification Tester.
• C. Operator Test Lead: Insert into the monitor’s operator jack to verify its operator test circuit.
• D. Rotary Switch: Selects the various pass and fail load values needed to verify the monitor’s operator and mat test circuits.

Operation

Mini Monitor

VERIFYING THE OPERATOR CIRCUIT

1. Connect the Wave Distortion Monitor Verification Tester’s green ground lead to equipment ground. This may be done using the included Ground Plug Adapter or alligator clip.
2. Insert the verification tester’s black operator test lead into the Mini Monitor’s operator jack.
3.  Set the rotary switch to OPERATOR FAIL LOW.
   The monitor’s red operator LED should illuminate, and its audible alarm should sound.
4. Set the rotary switch to OPERATOR PASS LOW.
   The monitor’s green operator LED should illuminate.
5. Set the rotary switch to OPERATOR PASS HIGH.
   The monitor’s green operator LED should illuminate.
6. Set the rotary switch to OPERATOR FAIL HIGH.
   The monitor’s red operator LED should illuminate, and its audible alarm should sound.
7.  Disconnect the operator test lead from the monitor.VERIFYING THE MAT CIRCUIT
8. If using a discontinued monitor model (see page 7), insert a wrist cord into the monitor’s operator jack and attach it to its park snap. This will enable the audible alarm for the mat circuit.
9. Connect the included stacking snap to the verification tester’s white mat test lead.
10. Disconnect the monitor from its worksurface mat and turn it over to expose its 10mm snaps.
11. Connect the verification tester’s white mat test lead to the monitor’s 10mm mat snap.
12. Set the rotary switch to MAT 500M PASS. The monitor’s green mat LED should illuminate.
13. Set the rotary switch to MAT 500M FAIL. The monitor’s red mat LED should illuminate, and its audible alarm should sound.

Multi-Mount Monitor

VERIFYING THE OPERATOR CIRCUIT

1. Connect the Wave Distortion Monitor Verification Tester’s green ground lead to equipment ground. This may be done using the included Ground Plug Adapter or alligator clip. See Figure 3.
2. Insert the verification tester’s black operator test lead into the Multi-Mount Monitor’s operator jack.
3. Set the rotary switch to OPERATOR FAIL LOW.
   The monitor’s red operator LED should illuminate, and its audible alarm should sound.
4. Set the rotary switch to OPERATOR PASS LOW.
   The monitor’s green operator LED should illuminate.
5. Set the rotary switch to OPERATOR PASS HIGH.
   The monitor’s green operator LED should illuminate.
6.  Set the rotary switch to OPERATOR FAIL HIGH.
   The monitor’s red operator LED should illuminate,
   and its audible alarm should sound.
7. Disconnect the operator test lead from the monitor.VERIFYING THE MAT CIRCUIT
8. If using a discontinued monitor model (see page 7), insert a wrist cord into the monitor’s operator jack and attach it to its park snap. This will enable the audible alarm for the mat circuit.
9. Connect the included stacking snap to the verification tester’s white mat test lead.
10. Disconnect the monitor’s white mat monitor cord from its worksurface mat and turn it over to expose its 10mm snap.
11.  Connect the verification tester’s white mat test lead to the mat monitor cord’s 10mm snap.
12. Set the rotary switch to MAT 10M PASS. The monitor’s green mat LED should illuminate.
13. Set the rotary switch to MAT 10M FAIL. The monitor’s red mat LED should illuminate, and its audible alarm should sound.

Dual Operator Continuous Monitor

VERIFYING THE OPERATOR CIRCUIT

1. Connect the Wave Distortion Monitor Verification Tester’s green ground lead to equipment ground. This may be done using the included Ground Plug Adapter or alligator clip. See Figure 3.
2. Insert the verification tester’s black operator test lead into the satellite remote’s operator jack.
3. Set the rotary switch to OPERATOR FAIL LOW.
   The monitor’s red operator LED should illuminate, and its audible alarm should sound.
4. Set the rotary switch to OPERATOR PASS LOW.
   The monitor’s green operator LED should illuminate.
5. Set the rotary switch to OPERATOR PASS HIGH.
   The monitor’s green operator LED should illuminate.
6. Set the rotary switch to OPERATOR FAIL HIGH.
   The monitor’s red operator LED should illuminate,
   and its audible alarm should sound.
7. Disconnect the operator test lead from the monitor.VERIFYING THE MAT CIRCUIT
8. Insert a wrist cord into the satellite remote’s operator jack and attach it to its park snap. This will enable the audible alarm for the mat circuit.
9. Connect the included stacking snap to the verification tester’s white mat test lead.
10. Disconnect the satellite remote’s black mat monitor cord from its worksurface mat and turn it over to expose its 10mm snap.
11. Connect the verification tester’s white mat test lead to the mat monitor cord’s 10mm snap.
12. Set the rotary switch to MAT 10M PASS. The monitor’s green mat LED should illuminate.
13. Set the rotary switch to MAT 10M FAIL. The monitor’s red mat LED should illuminate, and its audible alarm should sound.
14. Repeat steps 1-12 for the second satellite remote.

Full-Time Continuous Monitor

VERIFYING THE OPERATOR CIRCUIT

1. Connect the Wave Distortion Monitor Verification Tester’s green ground lead to equipment ground. This may be done using the included Ground Plug Adapter or alligator clip. See Figure 3.
2. Insert the verification tester’s black operator test lead into the Full-Time Continuous Monitor’s operator jack.
3. Set the rotary switch to OPERATOR FAIL LOW.
   The monitor’s red operator LED should illuminate, and its audible alarm should sound.
4. Set the rotary switch to OPERATOR PASS LOW.
   The monitor’s green operator LED should illuminate.
5. Set the rotary switch to OPERATOR PASS HIGH.
   The monitor’s green operator LED should illuminate.
6. Set the rotary switch to OPERATOR FAIL HIGH.
   The monitor’s red operator LED should illuminate, and its audible alarm should sound.
7. Disconnect the operator test lead from the monitor.VERIFYING THE MAT CIRCUIT
8. Insert a wrist cord into the monitor’s operator jack and attach it to its park snap. This will enable the audible alarm for the mat circuit.
9. Connect the included stacking snap to the verification tester’s white mat test lead.
10. Disconnect the monitor’s white mat monitor cord from its worksurface mat and turn it over to expose its 10mm snap.
11. Connect the verification tester’s white mat test lead to the mat monitor cord’s 10mm snap.
12. Set the rotary switch to MAT 10M PASS. The monitor’s green mat LED should illuminate.
13. Set the rotary switch to MAT 10M FAIL. The monitor’s red mat LED should illuminate, and its audible alarm should sound.

Calibration
Frequency of recalibration should be based on the critical nature of those ESD sensitive items handled and the risk of failure for the ESD protective equipment and materials. In general, Desco recommends that calibration be performed annually. Use the information below to verify if the Wave Distortion Monitor Verification Tester operates within its
specifications.

EQUIPMENT NEEDED

• RLC Bridge for testing operator circuit
• Digital Multimeter with 50-100V power supply for testing mat circuit

SETTINGS

• @ 50 Hz
  Frequency = 1,000 Hz (20 x 50), 20th harmonic
• @ 60 Hz
  Frequency = 1,020 Hz (17 x 60), 17th harmonic
• Set function switch to read “Equivalent Parallel Circuit”

RECORD THE FOLLOWING DATA

Operator Rotary Switch Setting	Equivalent Parallel Capacitance	Targeted Specification (±10%)
Fail Low		138.9 pF
Pass Low		118.6 pF
Pass High		49.0 pF
Fail High		44.7 pF

Operator Rotary Switch Setting	Dissipation Factor	Targeted Specification (±10%)
Fail Low		.158
Pass Low		.367
Pass High		.445
Fail High		.192

Mat Rotary Switch Setting	Resistance @ 50V	Targeted Specification (±4%)
10M Pass		8 megohms
10M Fail		12 megohms
100M Pass		80 megohms
100M Fail		120 megohms
500M Pass		400 megohms
500M Fail		600 megohms

Specifications

Limited Warranty, Warranty Exclusions, Limit of Liability and RMA Request Instructions
See the Desco Warranty – Desco.com/Limited-Warranty.aspx

DESCO WEST – 3651 Walnut Avenue, Chino, CA 91710 • 909-627-8178
DESCO EAST – One Colgate Way, Canton, MA 02021-1407 • 781-821-8370 • Website: Desco.com

Documents / Resources

DESCO TB-3074 Wave Distortion Monitor Verification Tester [pdf] Instructions TB-3074, Wave Distortion Monitor Verification Tester, Monitor Verification Tester, Verification Tester

References

• User Manual