Fluke Biomedical 180 - Lead-To-Lead (Auxiliary) Current

180
Users Guide
2-12
Lead-to-Lead (Auxiliary) Current
Lead-to-Lead [I
A
] (auxiliary) current flows from any patient lead to any other
patient lead and to all other leads connected together. The current can be dc or
ac or a combination of both. Measurements are made with a true-rms converter
to provide the common base necessary for accurate readout with a variety of
common wave forms.
Under normal conditions, the current is primarily input bias current,
measurement current, or lead off sensing current. The worst-case condition is
measured from the individual lead to all others connected together. This is the
measurement made by the Analyzer.
Use the following steps to measure lead-to-lead current:
1. Connect the patient leads to the snaps on top of the Analyzer.
2. Set the FUNCTION switch in the LEAD-LEAD position.
VV
AA
µAµA
L
E
A
K
A
G
E
- CURRENT- CURRENT
- RESISTANCE- RESISTANCE
- GROUND- GROUND
- CHASSIS- CHASSIS
- LEAD -GND- LEAD -GND
- LEAD -LEAD- LEAD -LEAD
- LEAD ISO- LEAD ISO
- DUAL- DUAL
- LINE VOLTS- LINE VOLTS
- CURRENT- CURRENT
- RESISTANCE- RESISTANCE
- GROUND- GROUND
- CHASSIS- CHASSIS
- LEAD -GND- LEAD -GND
- LEAD -LEAD- LEAD -LEAD
- LEAD ISO- LEAD ISO
- DUAL- DUAL
fat09.eps
3. Make readings for individual leads, selecting by the LEAD switch. The
single lead carrying the most current is the reference lead, R
L
, acting as
the return for the other leads.
LEADLEAD
c
ra
ll
rlrl
lala
allall
fat12.eps
www. .com
information@itm.com1.800.561.8187