TECHNICAL BULLETIN TB-6576
Zero Volt Monitor Solo
Installation, Operation and Maintenance
Made in the
United States of America
Figure 1. EMIT Zero Volt Monitor Solo
Description
Leading companies use continuous monitors as a cost
effective component in satisfying the section 7.3 Compliance
Verification Plan requirements of ANSI/ESD S20.20.
The EMIT Zero Volt Monitor (ZVM) Solo is a single
station continuous monitor for operator, supervisor,
ESD worksurface, and metal tool fixture ground. It will
continuously monitor the ground integrity and charge
generation of one operator and supervisor as well as the
ground integrity for one ESD worksurface and one optional
metal tool fixture. It eliminates the need for periodic testing
and record keeping of wrist straps. This single station
monitor also features communication ports that allow it
to be used with EMIT SIM Software for data tracking and
management.
The patented** ZVM Solo is designed with Dual Polarity
Technology for true continuous monitoring (versus pulsed
or intermittent) of wrist strap functionality (path to ground
and presence of 1 megohm Resistor) and operator
safety according to accepted industry standards without
capacitance variations from personnel or enviorment. Dual
Polarity Technology uses dual-wire wrist cords to place
positive voltage on one line and negative voltage on the
other, resulting in near zero voltage at the operator.
The ZVM Solo will also detect Direct Current Voltage (VDC)
that is greater than ±2.5 VDC if the operator generates or
comes in contact with a voltage that would be dangerous to
an ESD susceptible item. Each ZVM Solo is calibrated with
accepted procedures and standards traceable to the National
Institute of Standards and Technology (NIST) and includes a
NIST certificate.
Continuous Monitors pay for themselves improving quality,
productivity, eliminating wrist strap daily testing and test
result logging. Continuous Monitors eliminate the need for
users to test wrist straps and log the results; by their function,
these monitors satisfy the ISO and ANSI/ESD S20.20 test
logging requirement. ANSI/ESD S20.20 section 7.3 states
“Compliance verification records shall be established and
maintained to provide evidence of conformity to the technical
requirements.” Per ANSI/ESD S1.1 Annex A.3 “Daily (wrist
strap system) testing may be omitted constant monitoring is
used.” Per ESD Handbook ESD TR20.20 section 5.3.2.4.4
“Typical Test programs recommend that wrist straps that are
used daily should be tested daily. However, if the products
that are being produced are of such value that knowledge of
a continuous, reliable ground is needed, and then continuous
monitoring should be considered or even required.”
The EMIT ZVM Solo is available in the following models:
Item
Power Adapter
50576
North America
50577
Asia
50579
Europe
EMIT SIM Software
The EMIT ZVM Solo is compatible with EMIT
SIM Software. EMIT SIM provides a platform
to monitor and record the activity of your EMIT
Smart Products. Save costs by using EMIT SIM to eliminate
the need to rely on people to physically check the status of
continuous monitors and ionizers every day. This software
also features tools for generating activity reports and
calibration / maintenance schedule management.
Click here
to learn more.
Packaging
1
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1
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2
4
1
ZVM Solo
Desco 09163 Dual-Wire Elastic Wrist Strap
Power Adapter, 12VDC
Mat Monitor Cord (Black)
Tool Monitor Cord (White)
Monitor Ground Cord (Green and Yellow)
Push and Clinch Snap
Washer
Flat Head Screw, 6-32 thread
Alligator Clip
Ring Terminal
Hook and Loop Fastener Strips
Cable Clips with Adhesive
Certificate of Calibration
**US patents 6,052,053 and 6,205,408
EMIT
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Website:
DescoEMIT.com
TB-6576
Page 1 of 4
March 2013
© 2013 DESCO INDUSTRIES, INC.
Employee Owned
Features and Components
A
B
C
D
E
F
G
L. Monitored Mat Terminal:
Monitors a worksurface mat for
proper dissipative resistance and static charges. Connect
the black mat monitor cord here.
M. Ground Terminal:
Common ground point for the monitor.
Connect the green and yellow monitor ground cord here.
Installation
FRONT VIEW
H
I
J
K LM
LEFT VIEW
Monitor Ground
Cord
Tool Monitor
Cord
Mat Monitor
Cord
Figure 2. ZVM Solo features and components
A. Monitored Supervisor Jack:
Where the supervisor
inserts the wrist strap cord plug. An operator must be
connected to the operator jack in order for the supervisor
jack to be used.
B. Supervisor LED:
When the LED is illuminated blue, the
supervisor is properly grounded. When the LED is flashing
blue and the alarm sounds, the supervisor is not properly
grounded.
C. Mat LED:
When the LED is illuminated green, the
worksurface mat is properly grounded. When the LED is
illuminated red and the alarm sounds, the worksurface mat is
not properly grounded.
D. Tool LED:
When the LED is illuminated green, the
metal tool fixture is properly grounded. When the LED is
illuminated red and the alarm sounds, the metal tool fixture is
not properly grounded.
E. Charge LED:
When the LED is off, the charge is within
the set limit. When the LED is illuminated red and the alarm
sounds, the charge is outside the set limit.
F. Operator LED:
When the LED is illuminated green, the
operator is properly grounded. When the LED is illuminated
red and the alarm sounds, the operator is not properly
grounded. The LED blinks red when the operator is not
connected. This serves as a reminder to connect to the
monitor when returning to the workstation.
G. Monitored Operator Jack:
Where the operator inserts
the wrist cord plug.
H. RS-485 OUT:
Software communication output. To be
used with EMIT SIM Software for real time data aquisition.
I. RS-485 IN:
Software communication input. To be used
with EMIT SIM Software for real time data aquisition.
J. Power Jack:
Connect the included 12VDC power adapter
here.
K. Monitored Tool Terminal:
Monitors tool station. Connect
the white tool monitor cord here.
Metal Tool
Fixture
Figure 3. Installing the ZVM Solo
Worksurface
1. Remove the monitor from the carton and inspect for
damage.
NOTE:
All ZVM Solos are packaged with a wire shorting
the tool terminal to the ground terminal. This is to
prevent the tool circuit from alarming when not in
use. Contact EMIT Customer Service to be provided
with instructions to turn off the tool monitor circuit.
2. Determine the mounting location of the ZVM Solo. The
front panel should be visible to the operator. Use the
included hook and loop fastener strips if preferred.
EMIT offers the
50578
Mounting Bracket (not included)
as an alternative method to mount the ZVM Solo.
3. Attach the tinned wire end of the mat monitor cord to its
appropriate terminal block connection located on the side
of the unit.
4. Route the mat monitor cord from the side of the monitor
to the worksurface mat. Use either the included push
and clinch snap or washer and screw to secure the cord
to the mat. The worksurface mat requires a seperate
ground cord (not included).
EMIT
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Website:
DescoEMIT.com
TB-6576
Page 2 of 4
© 2013 DESCO INDUSTRIES, INC.
Employee Owned
Figure 4. Screw allows mat monitor cord to be bolted to
mat to keep cord from disconnecting
5. Attach the tinned wire end of the included monitor
ground cord to the appropriate terminal block connection
on the side of the monitor. Attach the ring terminal end
to a ground point. It is important that this ground cord is
attached to a different ground point than that of the
worksurface mat. The face plate screw of a grounded
AC wall outlet may provide a convenient connection
point.
6. If applicable, attach the tinned wire end of the tool
monitor cord to the appropriate terminal block connection
on the side of the monitor. The included alligator clip
or ring terminal may be applied to the banana plug for a
secure connection to the grounded metal tool fixture
that you choose to monitor.
7. Connect the DC power adapter to the power jack located
on the side of the unit. Route the wire from the supply
to a nearby AC electrical outlet and plug the power
adapter into the outlet. Make sure the voltage and
frequency match those listed on the power adapter. The
monitor is now powered.
Figure 5. Using the ZVM Solo
Calibration
The ZVM Solo is calibrated to standards traceable to NIST.
Frequency of recalibratrion 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, we recommend that calibration be performed
annually.
Use the EMIT 50524 Limit Comparator for Dual-Wire
Monitors to perform periodic testing (once every 6-12
months) of the ZVM Solo. The Limit Comparator can
be used on the shop floor within a few minutes virtually
eliminating downtime, verifying that the monitor is operating
within tolerances.
See
TB-6542
for more information.
Operation
USING THE MONITOR
NOTE:
Elastic wrist straps are only compatible with the
default operator test voltage of 1.25V. Metal wrist straps
must be used if the operator test voltage is set to 50mV.
Apply an approved dissipative hand lotion such as
Menda
Reztore™ ESD Hand Lotion
to your wrist prior to use for
optimum results.
1. The monitor’s operator LED will be blinking red indicating
that it is ready for the operator to connect.
2. Fit the wristband snugly onto your wrist.
3. Snap the wrist cord to the wristband.
4. Plug the wrist cord into the monitored jack labeled
OPERATOR (see Figure 2). The corresponding operator
LED will switch from blinking red to solid green. This
indicates that the operator is properly grounded.
5. If this does not happen, examine the wrist cord
for continuity or damage and your wrist band to ensure
that it is securely fit.
6. A supervisor may plug their wrist strap into the
SUPERVISOR jack once an operator is connected to the
monitor. The monitor will alarm if a wrist strap is
connected to the SUPERVISOR jack without an operator
connected to the OPERATOR jack.
Figure 6. EMIT 50524 Limit Comparator for Dual-Wire
Monitors
EMIT
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Website:
DescoEMIT.com
TB-6576
Page 3 of 4
© 2013 DESCO INDUSTRIES, INC.
Employee Owned
Specifications
Operating Voltage
Operating Temperature
Monitor Dimensions
Monitor Weight
100-240 VAC, 50/60 Hz
32°F - 104°F (0 - 40°C)
4.7" x 2.3" x 0.7"
(11.9cm x 5.8cm x 1.8cm)
0.3 lbs (0.1 kg)
Limited Warranty, Warranty Exclusions, Limit of
Liability and RMA Request Instructions
See EMIT’s Warranty -
http://emit.descoindustries.com/Warranty.aspx
DEFAULT TEST VOLTAGES
Operator
1.25 V
Supervisor
Worksurface
Tool
Typical Response Time
DEFAULT TEST LIMITS
Operator
1.25 V
200 mV at 3 megohms
25mV
.058 seconds
Low Fail: < 1.72 megohms
Pass: 2 - 9 megohms
High Fail: > 11.5 megohms
Low Fail: < 1.72 megohms
Pass: 2 - 9 megohms
High Fail: > 11.5 megohms
Pass: < 3 megohms
Fail: > 3.5 megohms
Pass: < 7 ohms
Fail: > 10 ohms
> ±2.5 VDC on operator
Supervisor
Worksurface*
Tool
Charge Detector
OPTIONAL TEST VOLTAGES†
Operator
50 mV
Supervisor
Worksurface
Typical Response Time
50 mV
1.25 V at 3 ohms
.46 seconds
OPTIONAL TEST LIMITS†
Worksurface
Pass: < 2.5 ohms
Fail: > 3.5 ohms
Charge Detector
OPTIONAL SETTINGS†
Worksurface Monitor
Tool Monitor
Charge Detector
> ±1.25 VDC on operator
ON / OFF
ON / OFF
ON / OFF
*NOTE:
Worksurface must have a conductive layer such as
Dual Layer Rubber or Dissipative 3-Layer Vinyl or Micastat®
Dissipative Laminate with conductive buried layers. EMIT
continuous monitors are not recommended for use with
homogeneous matting.
†Contact
EMIT customer service for information on modifying
these settings.
EMIT
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Website:
DescoEMIT.com
TB-6576
Page 4 of 4
© 2013 DESCO INDUSTRIES, INC.
Employee Owned
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