PG LifeLink MARK V - Page 9

PG LIFELINK Mark V Line Isolation Monitor Instruction Manual Rev. 2.0
© 2014 PG LifeLink, Inc. - All rights reserved Page 9
4. If this is the rst time LIM has been energized, or if unit has been turned off for
more than two weeks, a reminder to set the system time will appear. Refer to User
Menu section of this manual.
Normal Operation - Under normal operating conditions the LIM will exhibit the
following:
1. The green “SAFE” indicator is illuminated, indicating unit is energized and
condition is normal.
2. The red “HAZARD” and amber “SILENCED” indicators are extinguished.
(Exception:
if “Alarm Volume” has been set to “Mute” in the conguration menu, the amber
“SILENCED” indicator will be continuously illuminated)
3. The 2-digit mA display, along with the 16-segment bar graph will indicate the
calculated Total Hazard Current for the Isolated Power System, including any
connected equipment.
4. The LCD display screen indicates “Status: System OK” along with the current time,
measured line-voltage, and (if activated) % of system full load.
THC Measurement - The primary function of the Mark V Line Isolation Monitor is to
continuously monitor the line-to-ground impedance of both line conductors of a single
phase, ungrounded, Isolated Power System. A “fault” condition exists when a piece of
connected equipment causes this impedance to drop signicantly, causing a
proportional rise in the calculated Total Hazard Current (THC). When the THC exceeds
the selected alarm threshold value of 5 mA or 2 mA, audible and visual alarms are
triggered on the front of the LIM as well as on any connected remote annunciators.
Loss of Ground - The Mark V LIM monitors its connection to the system reference
ground, and triggers an alarm when connection is lost. There are two redundant
connections from the LIM to ground, both of which must be maintained in order to
permit normal operation. If one connection is lost the LIM will provide a ground loss
alarm.
Alarms - Under alarm conditions the LIM will exhibit the following:
1. The green “SAFE” indicator is extinguished.
2. The red “HAZARD” indicator is illuminated along with an oscillating audible alarm.
3. For alarms corresponding to high Total Hazard Current, the 2-digit mA display will
ash the calculated THC value and the LCD display will indicate “Status: Hi Haz
Curr”.
4. For loss of reference ground connection alarm, the 2-digit mA display will ash
“
Gn” and the LCD display will indicate “Status: Ground Loss”.
5. For alarms corresponding to other features, including transformer overload and
overheating, the 2-digit display will operate normally, and the LCD display will
indicate the associated alarm status message.
6. For alarms corresponding to system errors, refer to System Errors in the Error
Codes and Troubleshooting section of this manual.
What to do in the event of an alarm - If the LIM goes into alarm during a procedure,
calmly press the “SILENCE” button to temporarily mute the audible alert, and then
identify the type of alarm from the list above.
For high THC alarms, determine if alarm correlates to a particular piece of equipment. If
alarm occurs within a few seconds of energizing or operating a specic device, that