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© 2014 PG LifeLink, Inc. - All rights reserved
PG LIFELINK Mark V Line Isolation Monitor Instruction Manual Rev. 2.0
device is likely the source of the fault. If it can be safely disconnected without
affecting the patient or procedure, then disconnect and tag it for analysis by
biomed or other maintenance personnel, and continue the procedure. LIM will
clear alarm and return to normal operation once fault is disconnected.
If device cannot be disconnected without affecting the patient or procedure, or if
source of alarm cannot be identied, then complete the case as normal. Follow
facility procedures to notify biomedical and/or facilities engineering department(s)
to investigate and resolve the root cause. Note that the audible alert will reactivate
if the alarm condition is not removed before the silence feature times out.
Hazard Current Range - The alarm threshold value and Total Hazard Current scale
are selectable for either 2mA or 5mA. Selecting the proper range is accomplished
by a setting in the User Menu. In most areas, the mandated THC alarm threshold
is 5mA. In some areas including Canada, a lower 2mA threshold is required.
The default setting is 5mA. See
User Menu section
for instructions.
Self-Testing - The Mark V LIM includes an automatic self-testing/self-calibrating
function. This function is activated automatically based on the “Auto-Cal” interval
setting in the system conguration menu. This function lasts approximately 25
seconds, during which the 2-digit display will indicate “CA”. During these
operations the LIM temporarily disconnects itself from the reference ground of the
isolated power system to avoid inducing unnecessary fault current into the system
and applies an internal precision reference network to simulate the selected full
scale THC alarm level. The unit also compensates for variations in line voltage or
other parameter shifts that may affect hazard current calculation.
In addition to the automatic self-test interval, the Mark V automatically enters the
self-calibration process whenever it is powered on.
Manual Testing - The internal test feature can also be activated manually at any
time by pressing and holding the “TEST” button of the front of the LIM. The LIM
measures the calibration reference network while showing its response on the
displays, and when the indication reaches the predened set point, the audible and
visual alarms will be triggered.
For ease in precisely testing the LIM’s alarm threshold, press and hold the Silence
and UP buttons, and briey press and release the Select button. A reading with 3-
digit precision will appear on the screen. Press Select to exit this mode at any time,
or allow it to exit automatically after about 3 minutes.
Optional Transformer Load Current monitoring - An optional current transducer
is available for measuring the transformer primary current. The Mark V has
conguration settings to match to the properties of the panel. The current is
displayed on the main operating screen in % of full-load current.
Optional Transformer Core Temperature monitoring - An optional temperature
alarm transducer is available, to warn of excessive heat buildup in the transformer.
When enabled in its conguration menu, the Mark V will provide an alarm when
the preset temperature threshold is exceeded. Note: The isolation transformer over-
temperature monitor is a factory option that must be selected when IPS is ordered.
Field installation is not available.
System Logs - A set of system logs is accessible from the LCD user interface. Log
memory is permanent and non-volatile, storing up to 75 entries each for Events
and Alarms. Once the capacity is reached, new entries replace old ones in a First-In-
