SCS Static Monitor 790 User manual

TB-9015 Page 1 of 7 © 2015 DESCO INDUSTRIES, INC.
Employee Owned
SCS -5,QGXVWULDO'ULYH6DQIRUG1&:HEVLWHStaticControl.com
Static Monitor 790
Installation, Operation and Maintenance
Description
The SCS Static Monitor 790 is designed to monitor the
operation of two wrist strap grounding systems and the
ground connection of a specified equipment chassis.
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XVHRQO\DQGZLWK6&6'XDO&RQGXFWRU:ULVWEDQGV
2300VM Series and SCS Dual Conductor Ground Cord
2300 Series. The monitor operates from a 120VAC
adaptor that is included in the North America version.
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adapter meeting the specifications. The product has not
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2300VM Series are required for use with the Static
Monitor 790, ordered separately.
Meets requirements of ANSI/ESD S20.20 and
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DUHRIVXFKYDOXHWKDWNQRZOHGJHRIDFRQWLQXRXV
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June 2015
USER GUIDE TB-9015
Figure 1. SCS Static Monitor 790.
Figure 2. SCS Static Monitor 790 Kit.
AC Adapter Mounting
SCS Static Monitor 790
Chassis/
Ground
Cords with
7ZR:LUH
Connector
Theory of Operation
The SCS Static Monitor 790 is designed to continuously
PRQLWRUWKHYROWDJHOHYHORQDQRSHUDWRUVXVLQJD
high impedance voltage measurement circuit. The
measured operator’s voltage is compared to one of four
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voltages. An alarm will sound with a corresponding
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contact detection circuit is also employed to let the user
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H[SHULHQFHGDORVVRIFRQWLQXLW\EHWZHHQWKHJURXQG
FRUGDQGZULVWEDQG
The ground connection of the Static Monitor 790 is
continuously monitored through a low DC current-loop
measurement circuit. The ground connection of an
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connected in series with the monitor’s ground
measurement circuit. An alarm will sound with
corresponding red lamps, when this loop resistance
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If all monitored components are operating within the
selected operating parameters of the Static Monitor 790,
a green lamp will illuminate.
The Static Monitor 790 uses a modified version of the
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VWDQGDUG6&6'XDO&RQGXFWRU*URXQGLQJ&RUG6HH
$FFHVVRULHV6HFWLRQ
*Voltage alarm levels ±15%
**Ground disconnect ±20%
&$87,217KH6&66WDWLF0RQLWRUGRHVQRWKDYH
WKHFDSDELOLW\RIYHULI\LQJWKDWWKHJURXQGSRLQWLVD
VXLWDEOHJURXQG,I\RXDUHQRWVXUHZKDWDVXLWDEOH
JURXQGLVFRQWDFWDOLFHQVHGHOHFWULFLDQEHIRUH
installation.

TB-9015 Page 2 of 7 © 2015 DESCO INDUSTRIES, INC.
Employee Owned
SCS -5,QGXVWULDO'ULYH6DQIRUG1&:HEVLWHStaticControl.com
Attaching Ground and Chassis Cords
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Refer to Figures 3 and 4 for this section.
Two-Wire Connector
AC Adapter Ground Wire
AC Adapter
DC Plug
790 Chassis/Ground Cord
Attach 3M™Static Monitor 790
Chassis/Ground Cord or AC Adapter
Ground Wire
7ZR:LUH&RQQHFWRU
*
AC Adapter
*URXQG:LUH
*
DC Plug
AC Adapter
Attach 790 Chasis/Ground
Cord or AC Adapter
*URXQG:LUH
*
*
*790 Chasis/Ground Cord
AB
Figure 3. Attachment of Ground Cords.
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WKHJURXQGFRQQHFWLRQ)LJ$3HUIRUP6WHSZKHQ
monitoring the ground connection through a grounded
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Installation of Static Monitor 790 with Chassis
Terminal Connected Directly to Earth/Electrical
Ground
Determine how you want to ground the Static Monitor

D,I\RXDUHJURXQGLQJWKH6WDWLF0RQLWRUWKURXJK
WKH:LUH$&DGDSWRU1RUWK$PHULFDVXSSOLHG
SHUIRUPWKHIROORZLQJVWHSV
 $WWDFKWKHWLQQHGJURXQGZLUHRIWKH$&
adaptor to the ground terminal of the two-wire
 FRQQHFWRUE\LQVHUWLQJLWLQWRWKHRSHQLQJDQG
securing with screwdriver.
 $WWDFKRQHRIWKHVXSSOLHG6WDWLF0RQLWRU
 &KDVVLV*URXQG&RUGVWLQQHGHQGWRWKH
chassis terminal of the twowire connector in
the same manner.
 $WWDFKWKHULQJWHUPLQDOHQGRIWKH&KDVVLV
Ground Cord to an earth/electrical ground with
 DVFUHZQRWVXSSOLHG
 3OXJWKHWZRZLUHFRQQHFWRULQWRWKHMDFNDWWKH
rear of the Static Monitor 790.
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through a Chassis/Ground Cord perform the following
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 $WWDFKRQHRIWKHVXSSOLHG&KDVVLV*URXQG
 &RUGVWLQQHGHQGWRWKHJURXQGWHUPLQDORI
 WKHWZRZLUHFRQQHFWRUE\LQVHUWLQJLWLQWRWKH
opening and securing with screwdriver.
 $WWDFKWKHRWKHU&KDVVLV*URXQG&RUGWRWKH
chassis terminal of the two-wire connector in
the same manner.
 $WWDFKWKHULQJWHUPLQDOHQGVRIERWKFRUGV
 VHSDUDWHO\ZLWKWZRVFUHZVQRWVXSSOLHGWRDQ
earth/electrical ground.
 3OXJWKHWZRZLUHFRQQHFWRULQWRWKHMDFNDWWKH
rear of the Static Monitor 790.
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DWWDFKHDFKRIWKHFRUGVWRVHSDUDWHJURXQGERQGLQJ
SRLQWV%\DWWDFKLQJWKHFRUGVWRWKHVDPHJURXQGEXW
DWGLIIHUHQWSK\VLFDOORFDWLRQVWKHPRQLWRUFDQFKHFNIRU
loose or lost connections.
3M™Static Monitor 790 Connected
Directly to Ground
3M™Static Monitor 790 Connected through
Equipment Chassis Ground
Rear of 790 Monitor
AC Adapter
Ground Wire
or Chassis/Ground
Cord
AC Adapter
Ground Wire
or Chassis/Ground
Cord
Chassis/Ground
Cord Chassis/GroundCord
Electrical Ground
Existing Equipment
Ground Wire
790 Connected
Directly to Ground 790 Connected through Equipment Chassis Ground
Rear of
790 Monitor
AC Adapter
*URXQG:LUH
or Chassis/
Ground Cord
Chassis/
Ground Cord
Electrical Ground
AC Adapter
*URXQG:LUH
or Chassis/Ground
Cord
Chassis/Ground Cord
([LVWLQJ(TXLSPHQW
*URXQG:LUH
AB
Figure 4. SCS Static Monitor 790 Connected Directly to
Ground or Through Equipment Chassis Ground.
Installation of SCS Static Monitor 790 with Chassis
Terminal Connected to a Grounded Equipment
Chassis
Determine how you want to ground the Static Monitor

D,I\RXDUHJURXQGLQJWKH6WDWLF0RQLWRUWKURXJK
the 3-wire AC adaptor supplied, perform the following
VWHSV
 $WWDFKWKHWLQQHGJURXQGZLUHRIWKH$&
adaptor to the ground terminal of the two-wire
 FRQQHFWRUE\LQVHUWLQJLWLQWRWKHRSHQLQJDQG
securing with screwdriver.
 $WWDFKRQHRIWKHVXSSOLHG&KDVVLV*URXQG
 &RUGVWLQQHGHQGWRWKHFKDVVLVWHUPLQDORI
the two-wire connector in the same manner.
 $WWDFKWKHULQJWHUPLQDOHQGRIWKH&KDVVLV
Ground Cord to the equipment chassis with a
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 3OXJWKHWZRZLUHFRQQHFWRULQWRWKHMDFNDWWKH
rear of the Static Monitor 790.
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&KDVVLV*URXQG&RUGSHUIRUPWKHIROORZLQJVWHSV
 $WWDFKRQHRIWKHVXSSOLHG&KDVVLV*URXQG
 &RUGVWLQQHGHQGWRWKHJURXQGWHUPLQDORI
 WKHWZRZLUHFRQQHFWRUE\LQVHUWLQJLWLQWRWKH
opening and securing with screwdriver.
 $WWDFKWKHRWKHU&KDVVLV*URXQG&RUGWRWKH
chassis terminal of the two-wire connector in
the same manner.

TB-9015 Page 3 of 7 © 2015 DESCO INDUSTRIES, INC.
Employee Owned
SCS -5,QGXVWULDO'ULYH6DQIRUG1&:HEVLWHStaticControl.com
 $WWDFKWKHULQJWHUPLQDOHQGRIWKH&KDVVLV
Ground Cord connected to the ground terminal
 RIWKHWZRZLUHFRQQHFWRUZLWKDVFUHZQRW
 VXSSOLHGWRDQHDUWKHOHFWULFDOJURXQG
 $WWDFKWKHULQJWHUPLQDOHQGRIWKH&KDVVLV
Ground Cord connected to the chassis ground
terminal of the two-wire connector, with a
 VFUHZQRWVXSSOLHGWRDQHTXLSPHQWFKDVVLV
 3OXJWKHWZRZLUHFRQQHFWRULQWRWKHMDFNDWWKH
rear of the Static Monitor 790.
&$87,21:KHQXVLQJWZR&KDVVLV*URXQG&RUGV
DWWDFKHDFKRIWKHFRUGVWRVHSDUDWHJURXQGERQGLQJ
SRLQWV%\DWWDFKLQJWKHFRUGVWRWKHVDPHJURXQGEXW
DWGLIIHUHQWSK\VLFDOORFDWLRQVWKHPRQLWRUFDQFKHFNIRU
loose or lost connections.
Attaching the SCS Static Monitor
790 to a Workbench or Equipment
Chassis
Figure 5. Attachment of Mounting Plate to SCS Static
Monitor 790.
Figure 6. SCS Static Monitor 790 attached to
workbench.
Figure 7. SCS Static Monitor 790 attached to equipment
chassis.
Refer to Figures 5, 6, and 7
Locate the Mounting Plate.
$WWDFKWKH0RXQWLQJ3ODWHLQWKHGHVLUHGORFDWLRQXVLQJ
RQHRIWKHIROORZLQJPHWKRGV
 D)RDPWDSHDOUHDG\DSSOLHGWRWKH0RXQWLQJ
 3ODWH&OHDQWKHVXUIDFHWREHPRXQWHGWR
with isopropyl alcohol. Remove release liner
 IURPWDSHEHIRUHPRXQWLQJ
 E7ZRSDQKHDGPDFKLQHRUZRRGVFUHZV
 QRWVXSSOLHG
$WWDFKWKH6WDWLF0RQLWRUWRWKHPRXQWHGSODWHDV
shown in Figure 5. Align the plate with the opening on
WKHERWWRPRIWKHPRQLWRUDQGVOLGHIRUZDUGRQWRSODWH
until it latches.
,QSXW-DFN ,QSXW-DFN
OK Lamp
Fault Lamps
Figure 8. Front of SCS Static Monitor 790
Voltage
Selection
Switch
DC Power
Input Jack
Electrical
Ground
Chassis
Ground
Hi-Lo Volume
Level Switch
Voltage
Selection
Switch DC Power ,QSXW-DFN
Electrical
Ground Chasis
Ground
Hi-Lo Volume
Level Switch
Figure 9. Rear of SCS Static Monitor 790.

TB-9015 Page 4 of 7 © 2015 DESCO INDUSTRIES, INC.
Employee Owned
SCS -5,QGXVWULDO'ULYH6DQIRUG1&:HEVLWHStaticControl.com
Operating Your System
5HIHUWR)LJXUHVDQG
Power Up
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the round connector on the end of the AC adaptor, into
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AC adaptor into an appropriate electrical outlet. The
green lamp should illuminate, signaling that the unit is
operational and that there are no alarm conditions. If
WKHJUHHQODPSGRHVQRWLOOXPLQDWHEXWUHGODPSVDUH
LOOXPLQDWHGZLWKDXGLEOHDODUPVRXQGLQJFKHFNDOOFRUGV
and ground connections.
Audible Alarm Volume Level
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RIWKH6WDWLF0RQLWRUE\VOLGLQJWKHVZLWFKWRWKH+L
or Lo position.
Selection of the Reference Voltage
The Static Monitor 790 allows for the selection of one of
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9EHLQJWKHPRVWVHQVLWLYHVHWWLQJDQG9WKHOHDVW
VHQVLWLYH6HOHFWDYROWDJHOHYHOE\VOLGLQJWKHVZLWFK
WRWKHDSSURSULDWHSRVLWLRQ7KHVHUDQJHVKDYHEHHQ
GHVLJQHGWRDFFRPPRGDWHJOREDO(6'UHTXLUHPHQWV
7KHVHOHFWLRQRIWKLVRSHUDWLRQDOSDUDPHWHULVEDVHG
upon the user s ESD control program requirements.
Fault Conditions – Lamps & Audible Alarms
For wrist strap malfunctions, the Static Monitor 790
indicates different alarms for each operator; a slow
DXGLEOHEHHSIODVKLQJODPSIRUWKHRSHUDWRURQWKHOHIW
LQSXWVLGHDQGDIDVWDXGLEOHFKLUSLQJEHHSIODVKLQJODPS
for the operator on the right input side. For grounding/
chassis-monitoring malfunctions, a continuous tone is
HPLWWHGZLWKERWKODPSVLOOXPLQDWHG
D5HGODPSVIODVKLQJZLWKDQDXGLEOHDODUP
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on the operator is greater than the pre-selected
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WKHZULVWEDQGDQGWKHDUPH[LVWWKHDODUPZLOO
activate.
If the SCS Static Monitor 790 alarm activates when
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VLWXDWLRQWKHFDXVHLVPRVWOLNHO\GXHWRSRRU
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DODUPLQJSHULRGZRXOGQRUPDOO\EHORQJLQGXUDWLRQ
XQOHVVLQWHUPLWWHQWFRQWDFWGXULQJWKLVW\SHRI
FRQGLWLRQ&KHFNFRQWDFWEHWZHHQWKHZULVWEDQGDQG
arm. Some operators may have difficulty in providing
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VNLQRUDUPKDLU7KH\PD\QHHGWRXVHDQDSSURYHG
VNLQPRLVWXUL]HURUUHSRVLWLRQWKHZULVWEDQGRQWKH
arm.
If the monitor’s alarm does not activate while the
operator is not moving, then the cause of the alarm
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WKHRSHUDWRU$KLJKUHVLVWDQFHEHWZHHQWKHRSHUDWRU
and ground would allow the operator to charge up as
WKH\PRYHGDERXW7KHDODUPSHULRGIRUWKLVW\SHRI
IDXOWZRXOGQRUPDOO\EHVKRUWDQGFRLQFLGHZLWKWKHLU
ERG\PRYHPHQW
$ODUPLQJFDQDOVREHFDXVHGE\DQLQWHUPLWWHQW
or high resistance in the wrist strap’s dual conductor
JURXQGFRUG5HSODFHDVXVSHFWFRUGZLWKDNQRZQ
JRRGJURXQGFRUGRUFKHFNWKHHQGWRHQGUHVLVWDQFH
RIWKHFRUGXVLQJDQRKPPHWHU$SSUR[LPDWHO\
PHJRKPRIUHVLVWDQFHVKRXOGH[LVWEHWZHHQWKHWLSWR
WLSDQGEDUUHOWREDUUHOFRQWDFWVRIWKHWZRSOXJV
located on opposite ends of the cord.
1RWH7KHRSHUDWRUVPD\FRPSODLQWKDWWKHDODUP
LVVRXQGLQJWRRRIWHQXQWLOWKH\OHDUQWRDGMXVWWKH
ZULVWEDQGWRILWVHFXUHO\RUDSSO\DQDSSURYHGVNLQ
PRLVWXUL]HURQDIUHTXHQWEDVLV3OHDVHUHPHPEHU
that the monitor is informing you that the operator is
H[FHHGLQJWKHHVWDEOLVKHGVWDWLFFRQWUROUHTXLUHPHQWIRU
voltage to ground when wearing a static protective wrist
VWUDSDVVHPEO\7KHVHDODUPVDOHUWWKHRSHUDWRUZKHQ
VHQVLWLYHHOHFWURQLFVDUHSRVVLEO\EHLQJH[SRVHGWR
static electricity. Prior to incorporating the static monitor
into your static control process, the operator was
unaware of these events.
E7ZRUHGODPSVLOOXPLQDWHGFRQWLQXRXVO\ZLWKDQ
DXGLEOHDODUP7KLVLQGLFDWHVWKDWDKLJKUHVLVWDQFH
FRQGLWLRQJUHDWHUWKDQRKPVH[LVWVEHWZHHQWKH
Chassis/Ground Cord and ground. This will include
WKHHTXLSPHQWFKDVVLVJURXQGLIEHLQJPRQLWRUHG
&KHFNWKHJURXQGFRUGVIRUFRQWLQXLW\DQGJURXQG
attachment points.
Connecting an Operator to the SCS
Static Monitor 790
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DUPDQGDGMXVWWKHEDQGIRUDVQXJILWIROORZLQJWKH
LQVWUXFWLRQVUHFHLYHGZLWKWKHZULVWEDQG
,QVHUWD'XDO&RQGXFWRU*URXQG&RUGORQJHUSOXJ
HQGLQWRHLWKHURQHRIWKHLQSXWMDFNVORFDWHGRQ
the front of the Static Monitor 790. The wrist strap
monitoring function is activated during this step.
7KHJUHHQODPSH[WLQJXLVKHVDWWKLVWLPHDQGWKH
FRUUHVSRQGLQJUHGODPSZLOOLOOXPLQDWHZLWKDQDXGLEOH
alarm.
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HQGLQWRWKHZULVWEDQGVRFNHW7KHUHGODPSDQGWKH
DXGLEOHDODUPVKRXOGEHH[WLQJXLVKHGDWWKLVWLPH
1RWH)ROORZLQJWKHDWWDFKPHQWVHTXHQFHDERYH
SURYLGHVDQRSHUDWRUVZLWKDVLPSOHJRQRJRWHVWRI
the wrist strap function every time they connect to the
Static Monitor 790.

TB-9015 Page 5 of 7 © 2015 DESCO INDUSTRIES, INC.
Employee Owned
SCS -5,QGXVWULDO'ULYH6DQIRUG1&:HEVLWHStaticControl.com
Quick Review of Functions
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LQFOXGLQJWKHFKDVVLVJURXQGFRQQHFWLRQZKHQ
PRQLWRUHGDQGWKHRSHUDWRU¶VYROWDJHLVKHOGEHORZ
WKHSUHVHOHFWHGUDQJHWKHFRUGZULVWEDQGDQG
contact to the arm of the wearer are all considered to
EHIXQFWLRQLQJFRUUHFWO\$WWKLVWLPHWKHJUHHQODPS
illuminates on the front of the monitor.
,IDQRSHUDWRUVGHYHORSVDYROWDJHWKDWH[FHHGV
WKHSUHVHOHFWHGYROWDJHGXULQJQRUPDOZRUNDFWLYLWLHV
or the monitor loses its ground connection, the green
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DFRUUHVSRQGLQJDXGLEOHDODUP7KLVLVDQLQGLFDWLRQ
RIDQH[FHHGHGYROWDJHFRQGLWLRQRQWKHRSHUDWRUGXH
WRSRRUHOHFWULFDOFRQWDFWEHWZHHQWKHDUPDQGEDQGRU
LQWHUPLWWHQWRUEURNHQJURXQGFRUG
$QRSHUDWRU¶VIDXOWFRQGLWLRQLVHDVLO\LGHQWLILHGE\
RQHRIWKHWZRUHGODPSVQH[WWRHDFKLQSXWMDFN
7KHIODVKLQJUHGODPSVLGHQWLILHVWKHRSHUDWRUWKDW
LVH[SHULHQFLQJWKHIDXOWFRQGLWLRQ7KHUHGODPSVDQG
DXGLEOHDODUPVIODVKDQGEHHSDWGLIIHUHQWUDWHVWRKHOS
identify the location of the fault.
SCS Standby Jack 3057
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ZRUNVWDWLRQH[WHQGVWKHOLIHRIWKHPRQLWRUVLQSXW
MDFNV7KHRSHUDWRUGLVFRQQHFWVWKHJURXQGFRUGIURP
WKHZULVWEDQGDQGSOXJVLQWRWKH6WDQGE\-DFN
WKDWLVPRXQWHGDWWKHZRUNVWDWLRQ3OXJJLQJLQWRWKH
6WDQGE\-DFNSUHYHQWVWKH6WDWLF0RQLWRU
from continuously alarming when disconnected from the
ZULVWEDQG
Verification Procedure
This procedure verifies the positive/negative voltage
detection levels and ground monitoring performance of
the SCS Static Monitor 790 as stated in, Specifications
section of this user guide.
(TXLSPHQW5HTXLUHG±6XSSOLHGE\8VHU
'&3RZHU6XSSO\'&36ZLWKFRQQHFWLQJZLUHV
Output 0 to +10VDC minimum.
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and test leads. Use of a voltmeter is only required if
DCPS does not include a digital display.
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RKPVPLQLPXPRUGLVFUHWHUHVLVWRUVDQG
ohms ±1% value.
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6&6'XDO&RQGXFWRU*URXQG&RUG
7ZRZLUHPDOHFRQQHFWRUZLWKWLQQHGOHDGZLUHV
7HVWZULVWEDQGVRFNHW
Procedure:
*URXQG'LVFRQQHFW+L/R$XGLEOH$ODUP9ROXPH
/HYHO)XQFWLRQV*URXQG'LVFRQQHFW6SHFLILFDWLRQ
10 ohms ±20%
 D&RQQHFWWKH56%WRWKHWZRZLUHPDOH
 FRQQHFWRUZLWKWLQQHGOHDGZLUHV,QVHUW
the two-wire male connector into the mating
 MDFNORFDWHGDWWKHUHDURIWKHPRQLWRU
 E&RQQHFWWKH$&DGDSWRUVXSSOLHGZLWKWKH
Static Monitor 790 to the 25VDC input
 SRZHUMDFNORFDWHGDWWKHUHDURIWKHPRQLWRU
and plug the AC adaptor into a wall outlet.
 F6HWWKH56%DVIROORZVDQGREVHUYHDOOODPSV
 DQGDXGLEOHDODUP
 RKPV±*UHHQODPS215HGODPSV2))
 DQGDXGLEOHDODUP2))
 RKPV±*UHHQODPS2))5HGODPSVERWK
 21&RQWLQXRXVLOOXPLQDWLRQDQGDXGLEOH
 DODUP21&RQWLQXRXVWRQH
1RWH&RQILUP+LDQG/RDXGLEOHDODUPYROXPHOHYHOV
GXULQJRKPVWHVWFRQGLWLRQE\DGMXVWLQJ+L/RVOLGH
switch located at the rear of the monitor while alarm is
sounding.
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 D$GMXVWWKH56%FRQQHFWHGWRWKHWZRZLUH
 PDOHFRQQHFWRUWRRKPVRUOHVVWRVLOHQFH
the Ground Disconnect alarm. The green
 ODPSVKRXOGEH21DWWKLVWLPH
 E&RQQHFWWKH6&6'XDO&RQGXFWRU&RUG
 ORQJHUSOXJHQGLQWRRQHRIWKHZULVWVWUDS 
inputs on the SCS Static Monitor 790.
 /HDYHWKHRWKHUHQGRIWKHFRUGVKRUWHUSOXJ
 HQGRSHQFLUFXLWHGDWWKLVWLPH9HULI\WKDW
the green lamp is now OFF, red lamp nearest
 WKHZULVWVWUDSLQSXWEHLQJWHVWHGLVIODVKLQJ
 DQGWKDWWKHDXGLEOHDODUPLVVRXQGLQJ
1RWH7KHUHGODPSRQWKHOHIWVLGHRIWKHPRQLWRU
flashes at a slower rate than the lamp located on the
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UDWHDVWKHLQGLFDWLQJIODVKLQJUHGODPSV7KLVIXQFWLRQ
allows for identifying the fault location.
 F5HSHDWWKLVVWHSIRUWKHRWKHUZULVWVWUDS
 LQSXWYHULI\LQJSHUIRUPDQFHDVVWDWHGDERYH
Voltage Level Test
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
 G8QSOXJWKH$&DGDSWRUIURPWKHZDOORXWOHW
 H$GMXVW'&36RXWSXWWR9'&
 I&RQQHFWDZLUHEHWZHHQWKHSRVLWLYHRXWSXW
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the two connecting wires.

TB-9015 Page 6 of 7 © 2015 DESCO INDUSTRIES, INC.
Employee Owned
SCS -5,QGXVWULDO'ULYH6DQIRUG1&:HEVLWHStaticControl.com
 J,QVHUWWKH'XDO&RQGXFWRU&RUGVKRUWHUSOXJ
 HQGLQWRWKHWHVWZULVWEDQGVRFNHWDQGWKH
 RWKHUHQGRIWKHFRUGORQJHUSOXJHQGLQWR
one of the wrist strap inputs on the front of
the Static Monitor 790.
 K3OXJWKH$&DGDSWRULQWRWKHZDOORXWOHW
Voltage Level Tolerances
V-Level Switch +15% -15%
1V 1.15VDC 9'&
3 V 3.45VDC 2.55VDC
6 V 6.9VDC 5.1VDC
9 V 10.35VDC 7.65VDC
 L6HOHFWWKH9OHYHOXVLQJDVPDOOWLSWRRORQ
the V-Level switch located at the rear of the
monitor.
 M$FWLYDWHWKHRXWSXWRIWKH'&36DQGDGMXVWWR
1.15VDC. Verify that the green lamp has
turned OFF, red lamp nearest the wrist strap
 LQSXWEHLQJWHVWHGLVIODVKLQJDQGWKDWWKH
 DXGLEOHDODUPLV21
1RWH7KHUHGODPSRQWKHOHIWVLGHRIWKHPRQLWRU
flashes at a slower rate than the lamp located on the
ULJKW$OVRWKHDXGLEOHDODUPZLOOVRXQGDWWKHVDPH
UDWHDVWKHLQGLFDWLQJIODVKLQJUHGODPSV7KLVIXQFWLRQ
allows for identifying the fault location.
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the green lamp is ON, red lamp nearest the
 ZULVWVWUDSLQSXWEHLQJWHVWHGLV2))DQG
 WKDWWKHDXGLEOHDODUPLV2))
 O5HSHDWVWHSV-.KRZHYHUQRZ
 DGMXVWLQJWKH6&66WDWLF0RQLWRUIRU
V-Levels of 3, 6, and 9VDC and the DCPS
to the appropriate voltage level tolerances as
 VWDWHGLQWKHDERYHWDEOH$ODUPLQGLFDWLRQV
 ZLOOIROORZDVVWDWHGLQWKH9OHYHOFKHFN
 P5HSHDWVWHSV-/XVLQJWKHRWKHUZULVW
strap input on the SCS Static Monitor 790,
 YHULI\LQJSHUIRUPDQFHDVVWDWHGDERYH
 Q&KDQJHYROWDJHSRODULW\WRWKHZULVWEDQG
 WHVWVRFNHWE\UHYHUVLQJWKHZLUHVSUHYLRXVO\
 FRQQHFWHGLQVWHSIDERYHDWWKHWHVWVRFNHW
or at the output terminals of the DCPS and
 YHULI\SHUIRUPDQFHUHSHDWLQJVWHSV,0
Specifications
Dimensions +[:['PP[
PP[PP
:HLJKW R]J
Power Supply
Requirements* ,QSXW9$&1RUWK$PHULFD 2XWVLGH1RUWK$PHULFD$VUHTXLUHG
2XWSXW9'&#P$UDWHGORDG
2XWSXW3OXJ3RODUL]DWLRQ&HQWHU
Negative
2XWSXW3OXJ'LPHQVLRQVPP
2'[PP,'[PP/HQJWK
Accuracy The following parameters are valid
for altitudes up to 2000 m. Pollution
GHJUHH&ODVV(TXLSPHQW
9ROWDJH'HWHFWLRQ/HYHOV9
3V, 6V, and 9V ±10%
*URXQG'LVFRQQHFWRKPV
(QYLURQPHQWDO2SHUDWLQJ&RQGLWLRQV
7HPSHUDWXUH0D[LPXP)&
0LQLPXP)&
+XPLGLW\0D[LPXP5+
5HIHUHQFH+HOPV0DQ,QGXVWULDO&R/WG0RGHO1R
DPX411454G
&$87,213XUFKDVHGSRZHUVXSSO\PXVWKDYHDOOORFDO
required regulatory certifications. Line voltage within
WKHSRZHUVXSSO\VKDOOEHLVRODWHGIURPORZYROWDJH
E\GRXEOHRUUHLQIRUFHGLQVXODWLRQ7KH$&DGDSWRULV
required to operate the Static Monitor 790. If the ground
wire of the AC adaptor is not used, it is recommended
WKDWWKHZLUHEHWDSHGEDFNRQWRWKHPDLQFDEOHRIWKH
AC adaptor using electrical tape.
Parts Included
1 ea. SCS Static Monitor 790
1 ea. User’s Guide
HD0RXQWLQJ3ODWHZLWK5HPRYDEOH)RDP7DSH
1 ea. AC Adaptor
2 ea. Chassis/Ground Cords
1 ea. Two-wire Connector

TB-9015 Page 7 of 7 © 2015 DESCO INDUSTRIES, INC.
Employee Owned
SCS -5,QGXVWULDO'ULYH6DQIRUG1&:HEVLWHStaticControl.com
Required Accessories and Optional
Available Parts
Item Description Size
90 SCS Dual Conductor
)DEULF:ULVWEDQG
$GMXVWDEOH
2360 SCS Dual Conductor
Coil Cord P
2370 SCS Dual Conductor
Coil Cord P
2371 SCS Dual Conductor
Coil Cord P
3057 6&66WDQG%\-DFN [[
[[FP
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724P SCS Power Supply
Replacement AC
Adapter
Regulatory Information
China RoHS
Electronic Industry Standard of the
3HRSOH¶V5HSXEOLFRI&KLQD6-
T11363-2006, Requirements for
Concentration Limits for Certain
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Information Products.
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&DXVHGE\(OHFWURQLF,QIRUPDWLRQ3URGXFWV6-
T11364-2006, means that the product or part does
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H[FHVVRIWKHIROORZLQJPD[LPXPFRQFHQWUDWLRQYDOXHV
LQDQ\KRPRJHQHRXVPDWHULDODE\ZHLJKWIRU
OHDGPHUFXU\KH[DYDOHQWFKURPLXPSRO\EURPLQDWHG
ELSKHQ\OVRUSRO\EURPLQDWHGGLSKHQ\OHWKHUVRUE
E\ZHLJKWIRUFDGPLXP8QOHVVRWKHUZLVHVWDWHG
E\6&6LQZULWLQJWKLVLQIRUPDWLRQUHSUHVHQWV6&6¶V
EHVWNQRZOHGJHDQGEHOLHIEDVHGXSRQLQIRUPDWLRQ
SURYLGHGE\WKLUGSDUW\VXSSOLHUVWR6&6
7KLVQXPHULFDOUHIHUHQFHVKRXOGQRWEHFRQVWUXHG
as a representation regarding the product’s life or
DQH[WHQVLRQRIDSURGXFWZDUUDQW\,QWKHHYHQWDQ\
product is proven not to conform with SCS’s Regulatory
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H[FOXVLYHUHPHG\ZLOOEHDW6&6¶VRSWLRQHLWKHUL
replacement of product with a conforming product,
RULLUHIXQGRIWKHSXUFKDVHSULFHSDLGE\EX\HUIRU
HDFKQRQFRQIRUPLQJSURGXFWZLWKLQDUHDVRQDEOHWLPH
after written notification of said nonconformance and
return of said product to SCS. SCS shall not under any
FLUFXPVWDQFHVEHOLDEOHIRUGLUHFWLQFLGHQWDOVSHFLDORU
FRQVHTXHQWLDOGDPDJHVLQFOXGLQJEXWQRWOLPLWHGWRORVV
RISURILWVUHYHQXHRUEXVLQHVVUHODWHGWRRUDULVLQJRXW
RIWKLVFHUWLILFDWLRQLQFOXGLQJWKHXVHPLVXVHRULQDELOLW\
to use the product. Unless stated otherwise in writing,
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supplemented in any manner whatsoever.
WEEE Statement
7KHIROORZLQJLQIRUPDWLRQLVRQO\IRU(8PHPEHU6WDWHV
7KHPDUNVKRZQWRWKHULJKWLVLQFRPSOLDQFHZLWK:DVWH
Electrical and Electronic Equipment Directive 2002/96/
(&:(((7KHPDUNLQGLFDWHVWKHUHTXLUHPHQW127
to dispose the equipment as unsorted municipal waste,
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local law.
cULus Statement
Meets UL Safety Requirements.
FCC
1RWH7KLVHTXLSPHQWKDVEHHQWHVWHGDQGIRXQGWR
comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are
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harmful interference when the equipment is operated in
a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction
manual, may cause harmful interference to radio
communications. Operation of this equipment in a
UHVLGHQWLDODUHDLVOLNHO\WRFDXVHKDUPIXOLQWHUIHUHQFH
LQZKLFKFDVHWKHXVHUZLOOEHUHTXLUHGWRFRUUHFWWKH
LQWHUIHUHQFHDWWKHLURZQH[SHQVH
1RWH0RGLILFDWLRQVWRWKLVGHYLFHVKDOOQRWEHPDGH
ZLWKRXWWKHZULWWHQFRQVHQWRI6&68QDXWKRUL]HG
modifications may void the authority granted under
Federal Communication Rules and Industry Canada
Rules permitting the operation of this device.
This device complies with Part 15 of the FCC Rules.
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this device may not cause harmful interference, and
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including interference that may cause undesired
operation.
ICES Statement
This Class A digital apparatus meets all requirements
of the Canadian Interference-Causing Equipment
Regulations.
Cet appareil numérique de la classe A respecte toutes
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Canada.
Made in China
Limited Warranty, Warranty Exclusions, Limit of
Liability and RMA Request Instructions
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