ZERO VOLT MONITOR Installation and Operating Instructions
Contents
1. Vermdsoni TECHNICAL BULLETIN TB 7561 ZERO VOLT MONITOR Installation and Operating Instructions Made in America Attach the tinned wire end of the black ground wire to the center position on the screw terminal block on the rear of the unit Attach the ring terminal end to an alternate ground point It is Packaging VII 1 Zero Volt Monitor 1 Snap Kit 2 Wrist Strap Kits 2 Operator Ground Cables black and white i important that this ground wire 2 S poids Pia aild is attached to a different ground i Monitor Ground Cord point than the mat ground cord of the previous step The face plate 2 Floor Mat Ground Cords green screw ofa grounded AC wall with yellow stripe Figure 1 222755 Continuous Dual Operator Zero Volt Monitor Description The Vermason 222755 provides continuous ground monitoring of two operators and their workstations using patented ZERO VOLT MONITORING resistive loop technology No other method is as direct and reliable This technology allows the operator to typically be near zero volts with respect to Earth ground The 222755 is also unaffected by capacitance variations Installation Remove the monitor from the VIII carton and inspect for damage Determine the mounting location of 222755 monitor The front panel should be visible to both of the operators Determine the mounting locations of the operator remotes Make IX sure to place the remotes at a2. distance that enables its leads to reach the monitor outlet may provide a convenient connection point Route the hard wired mat monitor cords from the back of the monitor to the snaps attached to the grounded mats Snap the white mat ground wire to the OPERATOR 1 mat and the black mat ground wire to the OPERATOR 2 mat Insert the modular plugs of each remote cord into their appropriate modular jacks located at the rear of the unit See Figures 2 and 3 IV Install the remotes to the X Connect the DC power supply to associated M S aA ang workbench or another surface the power jack located at the rear AA ee using the provided screws of the unit Route the wire from the supply to a nearby AC outlet Continuous Monitors pay for Note The Zero Volt Monitor remotes and plug the power supply into the themselves improving quality productivity eliminating wrist strap daily testing and test result logging are configured differently from other Vermason remotes Be sure to only use the remotes that were packaged with outlet Make sure the voltage and frequency match those listed on the power supply The monitor is Reference EN 61340 4 1 per A 5 2 Measurement method for wrist strap testing Where continuous your Zero Volt Monitor P sa V Attach the tinned wire ends of MONONA used no additional the mat cords to their appropriate testing is required screw terminal block connection P located at
3. 222755 can be calibrated with the 222770 Limit Comparator This will allow you to set the operator series resistance pass high and low limits The factory default settings are 35M ohms high and 1 9M ohms low Refer to the 222770 Limit Comparator instruction manual for more information NOTE The series test resistance is not the same as the operator to ground resistance As shown in the figure below the series resistance is made up of the 1M ohm resistors in Whi a iNi 5 MN Figure 5 Jumpers JP1 JP2 JP5 JP6 JP7 UNIT C 4TH DIMENSION FOURTH AVENUE LETCHWORTH HERTS SG6 2TD UK Phone 0044 0 1462 672005 Fax 0044 0 1462 670440 e mail Service Vermason co uk Internet Vermason co uk TB 7561 Page 3 of 5 2011 Vermason skin contanct 1 Meg ohm V Turn the appropriate pot resistance in cord See Figure T counterclockwise until the GROUND FAIL red LED VI Slowly turn the pot clockwise until the GROUND human body resistance iie passes green LED to monitor s remote VII Add 10 more resistance at least 1 ohm to the skin contanct 1 Meg ohm resistance and see if the resistance in cord GROUND FAIL LED red turns on series resistance VIII Return back to the starting resistance and confirm that Figure 6 the green LED turns back on the cord the wrist band to operator s High Resistance 10k ohms to skin resistance skin contact 3 5M ohms NOTE If the unit does not go red resistance
4. Adjust Disable Jumper JP5 Remove the cover from the case Remove jumper JP5 See Figure 5 to enable the Audible Adjust Potentiometer located at the rear of unit or add the jumper to disable it maximum volume Charge Display Disable Jumper JP6 Remove the cover from the case Il Remove jumper JP6 See Figure 5 to enable the Charge LED located on the front of the unit or add the jumper to disable the Charge LED Data Out with Charge Jumper JP7 Remove the cover from the case Remove jumper JP7 See Figure 5 to disable the Charge Data Output for data collection or add the jumper to enable the Data Output Specifications Data Output The 222755 has a data output on the rear of the unit for operator and mat status Jumper JP7 located inside the unit enables charge detection operator status to be sent out instead of operator low status To enable charge detection data output shunt the jumper and choose Zero Volt Monitor Charge Detection Enabled as the device for this 222755 In this configuration an operator FAIL LOW will be sent out as a PASS Contact the manufacturer for additional information on the Data Output Dimensions Zero Volt Monitor 14 3cm x 12 3cm x 6 1cm Operator Ground Cable Length 365 8cm Mat Ground Cord Length 182 9cm Monitor Ground Cord Length 182 9cm Floor Mat Ground Cord Length 182 9cm Calibration and Adjustments CALIBRATION The
5. injury loss or damage direct or consequential arising out of the use of or the inability to use the product Before using users shall determine the suitability of the product for their intended use and users assume all risk and liability whatsoever in connection therewith UNIT C 4TH DIMENSION FOURTH AVENUE LETCHWORTH HERTS SG6 2TD UK Phone 0044 0 1462 672005 Fax 0044 0 1462 670440 e mail Service Vermason co uk Internet Vermason co uk TB 7561 Page 5 of 5 2011 Vermason
6. 1 GND 1 and JP2 GND2 located at the rear of the unit See Figure 2 need to be on one pin II The associated potentiometers need to be adjusted fully clockwise The pots are located inside the unit on the bottom board The potentiometer closest to the rear of the unit is for GND 1 and the one closest to the front of the unit is for GND 2 See Figure 7 Figure 7 GND 1 and GND 2 Potentiometers UNIT C 4TH DIMENSION FOURTH AVENUE LETCHWORTH HERTS SG6 2TD UK Phone 0044 0 1462 672005 Fax 0044 0 1462 670440 e mail Service Vermason co uk Internet Vermason co uk TB 7561 Page 4 of 5 2011 Vermason VI VII VAIL Increase the resistance on the sub box to the desired level Turn the appropriate pot See Figure 7 counterclockwise until the GROUND FAILS red LED Slowly turn the pot clockwise until the GROUND passes green LED Add 10 more resistance at least 1 ohm to the resistance and see if the GROUND FAIL LED red turns on Return back to the starting resistance and confirm that the green LED turns back on NOTE If the unit does not go red with added resistance or return back to green when the extra resistance is removed repeat steps V VIII with added care in turning the pot Limited Warranty Vermason expressly warrants that for a period of five 5 years from the date of purchase Vermason Zero Volt Monitors will be free of defects in material parts and workmansh
7. MONITOR MAT 2 WIRING GROUND BLACK CABLE I ieee MAT 1 WIRING WHITE CABLE 10mm PUSH amp 10mm PUSH amp s 4m CLINCHSNAP m 55327 2 4 CLINCH SNAP E T 10mm snap needs to pierce _T and clinch bottom slide of mat and clinch bottom slide of mat snap needs to be at least 12 apart snap needs to be at least 12 apart or 72 max or 72 max T 10mm snap needs to pierce Y OPERATOR 2 OPERATOR 1 WORK SURFACE WORK SURFACE Figure 3 Installing the Zero Volt Monitor Operation Once Installation steps X have been completed the unit will be monitoring the mats ground Then connect the operator wrist straps and wrist cords by connecting the dual snaps on the operator wrist cords to the wrist strap and the mono plug at the other end of the wrist cord into the operator remote jack See Figure 4 Monitoring of the operators will remain in the STANDBY position until an operator s wrist cord is plugged into the remote jack SINGLE WRIST BAND FOR GUEST NOTE The operator remote has two jacks The 3 5 mm mono jack is to be used for the dual wrist strap A dual operator wrist cord plugged into this jack will be monitored The banana jack is grounded for use with a single conductor operator wrist cord This is an unmonitored grounded guest hookup Charge Detection When the operator is connected to the remote and accumulates a voltage greater than 1 25 volts the CHARGE LED red will dis
8. and the operator s with added resistance or return back resistance human body resistance l If the desired resistance is to green when the extra resistance is high 10k ohms 3 5M removed repeat steps V VIII with For a given series resistance the ohms jumpers JP1 GND added care in turning the pot typical operator to ground resistance 1 and JP2 GND 2 located can be calculated from the following at the rear of the unit See Low Resistance lt 1k ohms formula Figure 2 need to be on one pin l If the desired resistance is R operator to ground R series l l low lt 1k ohms jumpers 2M ohms 4 Il Next the desired resistance JP1 GND 1 and JP2 GND needs to be added in 2 located at the rear of the For a given operator to ground between the ground terminal unit See Figure 2 need to resistance the series resistance and ground Use a resistor be on both pins can be calculated from the following sub box to accomplish this formula task II Next the desired resistance needs to be added in R series R operator to ground III Connect the mat wire to the between the ground terminal 4 2M ohms sub box and connect the and ground Use a resistor sub box to ground sub box to accomplish this MAT RESISTANCE SETTINGS task IV Increase the resistance on 3 5M ohm the sub box to the desired II Connect the mat wire to the level sub box and connect the sub l If the desired resistance is box to ground 3 5M ohms jumpers JP
9. icated by the red LED in the OPERATOR section of the display as well as an audible alarm Operator Pass Safe Operator plugged into the remote and the series resistance is within the range of 1 9M ohms 975k ohms operator to ground to 35M ohms 3 0M ohms operator to ground Indicated by the green LED in the OPERATOR section of the display Operator Fail Low Operator plugged into the remote and the series resistance is less than or equal to 1 70M ohms 925k ohms operator to ground Indicated by the yellow LED in the OPERATOR section of the display as well as an audible alarm Ground Fail High The series resistance from the mat connection to ground and back to the circuit is greater than 3 8M ohms or 3 ohms depending on the configuration Indicated by the red LED in the GROUND section of the display as well as an audible alarm Ground Pass Safe The series resistance from the Mat connection to ground and back to the circuit is less than 3 5M ohms or 2 ohms depending on the configuration Indicated by the green LED in the GROUND section of the display The resistances quoted above are the Factory Defaults These numbers will vary depending on the configuration The Ground monitoring circuit not only monitors your workstation ground but ensures a correct ground for the operator Therefore if both grounds are in the HIGH mode your operators may not be properly grounded JUMPER SETTINGS Audible
10. ip labor Within the warranty period a credit for purchase of replacement Vermason products or at Vermason s option the product will be repaired or replaced free of charge If product credit is issued the amount will be calculated by multiplying the unused portion of the expected five year life times the original unit purchase price Call our Customer Service Department at 0044 0 1462 672005 for a Return Material Authorization RMA and proper shipping instructions and address Please include a copy of your original packing slip invoice or other proof of date of purchase Any unit under warranty should be shipped prepaid to the Vermason factory Warranty replacements will take approximately two weeks If your unit is out of warranty Vermason will quote repair charges necessary to bring your unit up to Vermason factory standards Call Customer Service at 0044 0 1462 672005 for proper shipping instructions and address Ship your unit freight prepaid Warranty Exclusions THE FOREGOING EXPRESS WARRANTY IS MADE IN LIEU OF ALL OTHER PRODUCT WARRANTIES EXPRESSED AND IMPLIED INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH ARE SPECIFICALLY DISCLAIMED The express warranty will not apply to defects or damage due to accidents neglect misuse alterations operator error or failure to properly maintain clean or repair products Limit of Liability In no event will Vermason or any seller be responsible or liable for any
11. play in its respective OPERATOR section for charge detection data out see the Data Output section on Page 3 To disable charge detection on the display shunt jumper JP6 inside the unit See Figurte 5 Ifa charge is detected while using this configuration the display will remain in its previous state until the charge is no longer detected Alarm Indicators Repetitive Single Beep OPERATOR 1 GROUND 1 Fail Repetitive Double Beep OPERATOR 2 GROUND 2 Fail Continuous Alarm OPERATOR 1and OPERATOR 2 GROUND 1 and GROUND 2 Fail DUAL WRIST BAND MONITORED FOR OPERATOR Figure 4 Connecting the Operator Wrist Straps and Wrist Cords UNIT C 4TH DIMENSION FOURTH AVENUE LETCHWORTH HERTS SG6 2TD UK Phone 0044 0 1462 672005 Fax 0044 0 1462 670440 e mail Service Vermason co uk Internet Vermason co uk TB 7561 Page 2 of 5 2011 Vermason The alarm volume may be adjusted with the potentiometer located at the rear of the unit Adjust the potentiometer counterclockwise to decrease the volume The volume control may be disabled or enabled by the jumper JP5 inside the monitor See Figure 5 for more details Status Indicators Standby condition Operator not plugged into the remote Indicated by the blue LED in the OPERATOR section of the display Operator Fail High Operator plugged into the remote and the series resistance is greater than or equal to 35M ohms 3 1M ohms operator to ground Ind
12. the rear of the unit See The wrist band will normally be Figures 2 and 3 The white cord worn for several hours at a time so is for OPERATOR 1 and the black it needs to be comfortable while dord is for OPERATOR 2 making good contact with the skin It is a good idea to check the VI Attach the work surface mats to wrist strap every time it is applied Constant on line monitors can be used so that any breaks will be immediately found EN 61340 5 2 paragraph 5 2 7 ground using the mat ground cords See Figure 3 Attach the ring terminal end of the cord to the bench common ground point or other appropriate ground point Attach the snaps at the opposite ends of the cords to the snaps on the work mat now powered UNIT C 4TH DIMENSION FOURTH AVENUE LETCHWORTH HERTS SG6 2TD UK Phone 0044 0 1462 672005 Fax 0044 0 1462 670440 e mail Service Vermason co uk Internet Vermason co uk TB 7561 April 2011 Page 1 of 5 2011 Vermason Alarm Audible Adjust Decrease CCW Analog Output Contact Manufacturer fo Specs Data Output Operator 1 Contact Manufacturer White Cable Power Connection GND 1 9 15VDC Center Positive Jumper JP1 Operator 2 Mat 1 Black Cable White Wire GND 2 Earth Ground Jumper JP2 Black Wire Mat 2 Black Wire Figure 2 Rear View of the Zero Volt Monitor OPERATOR 2 e vwwt OPERATOR 1 REMOTE JACK a REMOTE JACK BLACK CABLE WHITE CABLE WRIST ae 7 ESD me STRAP STRAP GND MONITOR
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