Prostat PWA-805 User manual

User Manual
PWA-805
WRIST STRAP AUDITOR FIXTURE


  Page
I. Before Using the Instrument 4
II. Safery 4
III. Descripon 4
IV. Accuracy 5
V. Baery Installaon & General Maintenance 6
VI. Normal Operaons 7
VII. Funconally Tesng the PMT-872A 13
General Specicaons 17

Copyright © 2012 by Prostat® Corporaon. All rights reserved. Printed in the United States of America. No part of this
manual may be used or reproduced in any manner whatsoever without wrien permission. For informaon contact
Prostat Corporaon, 1072 Tower Lane, Bensenville, IL 60106 USA
Prostat is the registered trademark of Prostat® Corporaon

4Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture
 
The Prostat PWA-805 Wrist Strap Auditor is designed to determine the condion of a wrist strap as-
sembly. Used with the PRS-801 or PRS-812 Resistance Meters, a resistance measurement can be made
of the full assembly cu and cord, the cu only, or the cord only. This measurement will dene the
operable condion of any standard wrist strap.
A. The PWA-805 unit approximates the basic electrical measurement requirements of the ANSI/ESD
S1.1 wrist strap standard.
B. The intent of the PWA-805 is to provide the ESD auditor with a convenient xture to measure the
exact resistance characteriscs of a wrist strap, rather than generally esmate its approximate
resistance range with an indicang checker.
C. The PWA-805 will provide the four following resistance measurements:
1. Resistance of a wrist strap from the inner, middle posion of the cu to the end of the ground-
ing cord.
2. The resistance between two points on the inner surface of the cu
3. The resistance between two points on the outer surface of the cu
4. The resistance between the cord cu snap and ground connecon
 
A. As with any electrical device, use proper electrical precauons to avoid personnel shock.
1. The PWA-805 Wrist Strap Auditor xture operates with power input from the Resistance Meter
at 10 to 100 volts, and is capable of delivering an annoying shock to any person touching it.
2. Although the current capability is limited, a disnct HAZARD EXISTS in the person’s reacon to
the shock.
3. To avoid personnel shock, do not touch the can electrodes when power is applied to the xture

To avoid electrical shock, do not touch the xture’s
can electrodes when power is being applied.
B. The PWA-805 is designed to be used in audit environments at test voltages of 100 volts or less.
Exceeding 100 volts greatly enhances the risk of personnel shock hazards and may damage the
xture.

Operaonal test voltages should not exceed
100 volts in the audit environment.

5
Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture
C. DO NOT USE THE PWA-805 AUDITOR if it fails to pass its funconal test.

Should the Funconal connuity check indicate improper operaon of the x-
ture, OR the xture becomes damaged, do not use the PWA-805.
Contact Prostat Customer Service Department for further instrucons.
D. DO NOT USE THE PWA-805 AUDITOR if it becomes damaged in any way.
E. Only qualied instrument repair personnel should open terminal connecons or repair the PWA-
805 AUDITOR.
F. Do not store or use in damp environments
G. Always store the PWA-805 in its protecve case.
 
A. Basic Descripon
The PWA-805 Wrist Strap Auditor Fixture consists of two metal cylinder electrodes mounted on a
plasc base and wired to a switch, cord connecon points and meter input receptacles.
1. The metal cylinder (can) electrodes are used to mount wrist strap cus for connuity and resis-
tance measurements.
2. A YELLOW cord receptacle allows the wrist strap grounding cord to be plugged into the xture’s
test circuit.
3. Two meter input receptacles (RED and BLACK) are provided to connect the Resistance Meter
to the xture’s test circuit. The Resistance Meter provides all resistance measurements for the
PWA-805 Auditor.
4. Two male snap posts, one 7 mm and one 4 mm, are provided for mounng the cu snap end
of the grounding cord to the xture circuit during Cord Only measurements.
5. A three posion rocker switch (BLACK) allows resistance measurements of the following wrist
strap components:
a. The Cu and Grounding Cord
b. The Cu Only
c. The Grounding Cord Only

6Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture

B. Funconal Test of the PWA-805 Wrist Strap Auditor Fixture
1. Funconal Connuity Test of the CUFF & CORD measurement funcon.
a. Connect the test leads from the Resistance Meter to the PWA-805 Auditor METER recep-
tacles. NOTE: Prior to using the Resistance Meter, read the Operaons Manual.
b. Plug an auxiliary test lead into the YELLOW CORD receptacle. Use a straight test lead
equipped with banana plugs. For ease of handling install an alligator clip on one end of the
test lead.
c. Select the CONTINUITY TEST posion on the Resistance Meter.
d. Touch the free end of the installed test lead to the PWA-805 adjustable can electrode (the
can on the right side of the xture equipped with a knurled, sloed locking screw).
e. Select the xture rocker switch middle posion, labeled CUFF & CORD.


7
Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture
f. Push the TEST buon on the Resistance Meter. The Resistance Meter should indicate 0
Ohms.

To avoid electrical shock, do not touch the xture,
can electrodes when power is being applied.
(1) If the Resistance Meter indicates 0 Ohms, the connuity test for the CUFF & CORD
test funcon is acceptable. Proceed to the CORD ONLY funconal test.
(2) If the meter indicates “innity” or a high resistance check the rocker switch posion
and test lead connecons and repeat the connuity test.
(3) If the Resistance Meter does not indicate 0 Ohms, do not use the PWA-805 Auditor.
Contact Prostat Customer Service.
2. Funconal Connuity Test of the CORD ONLY measurement funcon.
a. Connect the test leads from the Resistance Meter to the PWA-805 Auditor METER recep-
tacles. NOTE: Prior to using the Resistance Meter, read the Operaons Manual.
b. Plug an auxiliary test lead into the YELLOW CORD receptacle. Use a straight test lead
equipped with banana plugs. For ease of handling, install an alligator clip on one end of the
test lead.
c. Select the CONTINUITY TEST posion on the Resistance Meter.
d. Touch the free end of the installed test lead to the PWA-805 7 mm male CORD SNAP termi-
nal.
e. Select the xture rocker switch right posion, labeled CORD ONLY.
f. Push the TEST buon on the Resistance Meter. The Resistance Meter should indicate 0
Ohms.


8Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture

To avoid electrical shock, do not touch the xture
can electrodes when power is being applied.
(1) If the Resistance Meter indicates 0 Ohms, the connuity test for the 7 mm CORD
ONLY test funcon is acceptable. Proceed to the 4 mm CORD ONLY funconal test.
(2) If the meter indicates “innity” or a high resistance check the rocker switch posion
and test lead connecons and repeat the connuity test.
(3) If the Resistance Meter does not indicate 0 Ohms, do not use the PWA-805 Auditor.
Contact Prostat Customer Service.
g. Touch the free end of the installed test lead to the PWA-805 4 mm male CORD SNAP termi-
nal.
h. Select the xture rocker switch right posion, labeled CORD ONLY.
i. Push the TEST buon on the Resistance Meter. The Resistance Meter should indicate 0
Ohms.

To avoid electrical shock, do not touch the xture
can electrodes when power is being applied.
(1) If the Resistance Meter indicates 0 Ohms, the connuity test for the 4 mm CORD
ONLY test funcon is acceptable. Proceed to the CUFF ONLY funconal test.
(2) If the meter indicates “innity” or a high resistance check the rocker switch posion
and test lead connecons and repeat the connuity test.
(3) If the Resistance Meter does not indicate 0 Ohms, do not use the PWA-805 Auditor.
Contact Prostat Customer Service.
3. Funconal Connuity Test of the CUFF ONLY measurement funcon.
a. Connect the test leads from the Resistance Meter to the PWA-805 Auditor METER recep-
tacles.  Prior to using the Resistance Meter, read the Operaons Manual.
b. Aach an auxiliary test lead to the adjustable can electrode (right side of the xture). Use a
straight test lead equipped with banana plugs and two alligator clip.
c. Select the CONTINUITY TEST posion on the Resistance Meter.
d. Touch the free end of the installed test lead to the PWA-805 xed can electrode (the can on
the le side of the xture).
e. Select the xture rocker switch le posion, labeled CUFF ONLY.
f. Push the TEST buon on the Resistance Meter. The Resistance Meter should indicate 0
Ohms.

9
Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture


To avoid electrical shock, do not touch the xture
can electrodes when power is being applied.
(1) If the Resistance Meter indicates 0 Ohms, the connuity test for the CUFF ONLY test
funcon is acceptable, and all funconal tests are completed.
(2) If the meter indicates “innity” or a high resistance check the rocker switch posion
and test lead connecons and repeat the connuity test.
(3) If the Resistance Meter does not indicate 0 Ohms, do not use the PWA-805 Auditor.
Contact Prostat Customer Service.
 
A. General
1. This operaon will provide the four following resistance measurements:
a. Resistance of a wrist strap from the inner surface, middle posion of the cu to the end
of the grounding cord. This measurement indicates the maximum resistance between the
user and an ESD common ground point.
b. The resistance between two points on the inner surface of the cu. Properly used, this
measurement denes the connuity of the inner cu’s surface between 2 points, 180 °
apart.
(1) Thus, proper connecons of the cu to the wrist buckle may be conrmed.
(2) The connuity around the enre perimeter of the inner cu surface may be
conrmed.

10 Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture
c. The resistance between two points on the outer surface of the cu. This measurement
conrms the insulave characteriscs of the cus outer surface.
d. The resistance between the ground cord’s cu snap and its connecon to ground. This
measurement performs two funcons.
(1) It allows the operator to check the ground cord for “opens”
(2) It measures the total resistance of the ground cord conductor resistor and
connecon points.
2. The following procedures require the use of the Resistance Meter. Be sure to read its Opera-
ons Manual and perform its Funconal Test prior to using.
B. Resistance Measurement of a wrist strap assembly CUFF & CORD.
1. Connect the test leads from the Resistance Meter to the PWA-805 Auditor RED and BLACK
METER receptacles.
2. Place the rocker switch in the middle CUFF & CORD posion

The LEFT can electrode in the CUFF & CORD measurement Mode is used to hold the cu me-
chanically; it is not in the measurement circuit. The RIGHT can electrode is in the measure-
ment circuit. Consequently, the inner cu surface must contact the
RIGHT can electrode to obtain an accurate measurement.
3. Mount the wrist strap cu to the PWA-805 xture as follows:
a. Loosen the adjustable RIGHT can electrode and slide it toward the LEFT can electrode.
b. Posion the inner surface of the cu buckle against the LEFT can electrode and hold it
rmly in posion with your le hand.
c. With your right hand, stretch the cu over and onto the adjustable RIGHT can electrode.
d. Slide the adjustable RIGHT can electrode toward the right side of the xture unl there are
1 to 2 pounds of tension on the wrist strap cu.
e. Tighten the RIGHT can electrodes locking screw.
4. Plug the wrist strap’s ground cord banana plug into the YELLOW CORD receptacle.
5. The wrist strap is now mounted on the PWA-80S xture. Be sure:
a. The cu is posioned smoothly on the sides of the two can electrodes
b. The ground cord is properly aached to the cu buckle
c. The ground cord banana plug is fully inserted into the YELLOW CORD receptacle.
6. Select the 10 volt posion on the Resistance Meter and push the TEST buon to obtain a resis-
tance measurement.

11
Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture


To avoid electrical shock, do not touch the xture
can electrodes when power is being applied.

During the measurement, one might wish to check for “opens” in the ground cord
or poor connecons by stretching various parts of the cord and observing the
meter indicaon. Wiggling the snap connecons may indicate a loose ng snap.
a. Most US wrist straps are designed to measure approximately 1.0x106 Ohms, ±20 percent,
i.e., 8.0x105 to 1.2x106 Ohms.
b. Specially designed wrist straps used in munions are lower in resistance, while others are
designed for higher resistance levels, as in some internaonal markets.
c. Defecve wrist straps will measure well above 1.0x107 Ohms. CHECK YOUR ESD OPERA-
TIONS STANDARDS TO DEFINE THE PROPER RESISTANCE RANGE FOR OPERATIONAL WRIST
STRAP ASSEMBLIES.
d. If the wrist strap indicates defecve, or you wish to further dene the wrist strap’s charac-
teriscs, proceed with the following measurements.
C. Resistance Measurement of the wrist strap CUFF ONY, Inner Surface.
1. Connect the test leads from the Resistance Meter to the PWA-805 Auditor RED and BLACK

12 Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture
METER receptacles.
2. Place the rocker switch in the CUFF ONLY (le) posion

In this Measurement Mode both the LEFT and the RIGHT
can electrodes are in the measurement circuit.
3. Mount the wrist strap cu to the PWA-805 xture as follows:
a. Loosen the adjustable RIGHT can electrode and slide it toward the LEFT can electrode.
b. Posion the inner surface of the cu buckle against the LEFT can electrode and hold it
rmly in posion with your le hand.
c. With your right hand, stretch the cu over and onto the adjustable RIGHT can electrode.
d. Slide the adjustable RIGHT can electrode toward the right side of the xture unl there are
1 to 2 pounds of tension on the wrist strap cu.
e. Tighten the RIGHT can electrodes locking screw.
4. Disconnect the wrist strap’s ground cord from the cu buckle.
5. The wrist strap cu is now mounted on the PWA-805 xture. Be sure the cu is posioned
smoothly on the sides of the two can electrodes.


6. Select the 10 volt posion on the Resistance Meter and push the TEST buon to obtain a resis-
tance measurement.

13
Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture

To avoid electrical shock, do not touch the xture
can electrodes when power is being applied.
a. Most US wrist strap cus are designed to indicate very conducve, well below 1.0x105
Ohms.
b. Defecve wrist strap cus will measure well above 1.0x106 Ohms. CHECK YOUR ESD OPERA-
TIONS STANDARDS TO DEFINE THE PROPER RESISTANCE RANGE FOR OPERATIONAL WRIST
STRAP ASSEMBLIES.
c. Reposion the cu by sliding it 90 degrees around the can electrodes. Repeat the cu mea-
surement with buckle between cans.
D. Resistance Measurement of the wrist strap CUFF ONLY, Outer Surface.
1. Connect the test leads from the Resistance Meter to the PWA-805 Auditor RED and BLACK
METER receptacles.
2. Place the rocker switch in the CUFF ONLY (le) posion

In this Measurement Mode both the LEFT and the RIGHT
can electrodes are in the measurement circuit.
3. Mount the wrist strap cu to the PWA-805 xture as follows. Note: Be sure the ground cord is
disconnected.
a. Loosen the adjustable RIGHT can electrode and slide it toward the LEFT can electrode.
b. Posion the outer surface of the cu against the LEFT can electrode and hold it rmly in
posion with your le hand. Posion the buckle between the 2 cans.
c. With your right hand, stretch the cu over and onto the adjustable RIGHT can electrode.

Posion the cu buckle between the can
electrodes to prevent the buckle from aecng the
outer cu resistance measurement.
d. Slide the adjustable RIGHT can electrode toward the right side of the xture unl there are
1 to 2 pounds of tension on the wrist strap cu.
e. Tighten the RIGHT can electrodes locking screw.

14 Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture
4. The wrist strap cu is now mounted on the PWA-805 xture. Be sure the cu is posioned
smoothly on the sides of the two can erectrodes and the buckle is between the cans.

5. Select the 10 volt posion on the Resistance Meter and push the TEST buon to obtain a resis-
tance measurement.

To avoid electrical shock, do not touch the xture
can electrodes when power is being applied.
a. Most US wrist strap cu outer surfaces are designed to indicate high resistance (insulave)
and measure well above 1.0x109 Ohms.
b. Defecve wrist strap cus will measure well below 1.0x109 Ohms. CHECK YOUR ESD OPERA-
TIONS STANDARDS TO DEFINE THE PROPER RESISTANCE RANGE FOR OPERATIONAL WRIST
STRAP ASSEMBLIES.
6. Repeat the outer cu surface measurements at 100 volts.
E. Resistance Measurement of a wrist strap ground cord, i.e., CORD ONLY
1. Connect the test leads from the Resistance Meter to the PWA-805 Auditor RED and BLACK
METER receptacles.
2. Place the rocker switch in the right CORD ONL Y posion

In this measurement mode, both the 7 mm and the 4 mm
CORD SNAPs, as well as the YELLOW CORD receptacle
are in the measurement circuit.

15
Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture
3. Do Not Mount the wrist strap cu to the PWA-805 xture for this test. If it is mounted, it is not
part of the measurement circuit and may remain in posion.
4. Plug the wrist strap’s ground cord banana plug into the YELLOW CORD receptacle.
5. Aach the buckle connecon snap assembly to either the 7 mm or 4 mm snap post.
6. The wrist strap ground cord is now mounted on the PWA-805 xture. Be sure: The ground cord
banana plug is fully inserted into the YELLOW CORD receptacle.

7. Select the 10 volt posion on the Resistance Meter and push the TEST buon to obtain a resis-
tance measurement.

To avoid electrical shock, do not touch the xture
can electrodes when power is being applied.

During the measurement, one might wish to check for “opens” in the ground cord
or poor connecons by stretching various parts of the cord and observing the
meter indicaon. Wiggling the snap connecons may indicate a loose ng snap.
a. Most US wrist strap cord assemblies are designed to measure approximately 1.0x106 Ohms,
±20 percent, i.e., 8.0x105 to 1.2x106 Ohms.
b. Specially designed wrist straps used in munions are lower in resistance, while others are
designed for higher resistance levels, as in someinternaonal markets.
c. Defecve wrist straps will measure well above 1.0x107 Ohms. CHECK YOUR ESD OPERA-
TIONS STANDARDS TO DEFINE THE PROPER RESISTANCE RANGE FOR OPERATIONAL WRIST
STRAP ASSEMBLIES.

16 Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture
 
The user serviceable parts in the PWA-80S Wrist Strap Auditor are basically terminal connecons.
A. Care should be take to keep all connecons free from dirt and dust.
B. Occasionally a snap post may loosen. Tighten with a an appropriate screw driver. The xture case
may require opening to lock terminal connecons.
C. If in doubt, contact Prostat Customer Service for assistance or return of the unit.

Fixture Case: 4.6” L x 2.75” W x 0.95” H inches
Wrist Strap Two (2) top mounted metal cylinders: 1 xed, 1 adjustable for cu size
Cylinders: Cylinder Diameter: 1.25. x 1.0. H
Adjustable cylinder equipped with knurled locking screw for posioning
Comtrols: Three posion rocker switch: (1) Cu Only [Resistance between Cylinders]
(2) Cu & Cord Assembly [Resistance from cord ground point to cu cylinder];
(3) Cord Only [Resistance from cord ground point to cu snap connecons]
Connecons: Resistance Meter: 2 banana receptacles for meter leads
Cord Groundable Point: 1 banana receptacle
2 Cord Cu Snaps: 1 each 7mm diameter, 1 each 4mm diameter
Power: Not Applicable. The xture is used in conjuncon with the Resistance Meter and
test leads.
Weight: 4.5 oz.
Warranty: One year limited warranty

17
Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture


18 Rev. A / January 1995
PWA-805 Wrist Strap Auditor Fixture


PROFESSIONAL STATIC CONTROL PRODUCTS
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Prostat Corporaon
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All Prostat trademarks and trade names are the property of Prostat Corporaon.
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