Fluke 1550B - Maintaining the Meter; Cleaning; Principle of Measurement and Resistance

1550B
Users Manual
20
Maintaining the Meter
XW Warning
To avoid possible electric shock or personal injury, do not attempt to
repair or service your Meter beyond what is described in this manual.
Only qualified service personnel should service the product.
There are no user-replaceable parts inside the Meter.
Cleaning
XW Warning
To avoid possible electric shock or personal injury, remove excess
water from the cloth before cleaning the Meter to ensure that water
does not enter any terminal.
Periodically wipe the case with a damp cloth and mild detergent. Do not use
abrasives or solvents to clean the Meter.
Principle of Measurement and Resistance
The Meter measures insulation parameters and displays the results using with
the following formulas.
Ohm’s
Law
Capacitance
(charge)
PI
(Polarization Index)
DAR
(Dielectric
absorption ratio)
I
V
R =
V
Q
C =
min1
min10
×
×
=
R
R
PI
sR
R
DAR
30
min1
×
×
=