Copyright 2010 International Safety Instruments, Inc.
8
3.10 TEMPERATURE READOUT OPTIONS- ISI 3500
3.10.1 The Direct Digital Readout system is a non-
contact temperature measurement feature that allows
firefighters to estimate the surface temperature of
objects from a remote location.
3.10.1.1 Direct Digital Readout is a standard
feature of the ISI 3500 (may be ordered without
this option).
3.10.1.2 The temperature is digitally displayed
on the screen in the bottom right corner or above
the temperature scale (if the temperature scale
readout option is ordered).
3.10.1.3 To measure the approximate
temperature of an object, place the crosshairs
on the center of the object and read the digital
readout. Direct Digital Readout takes a one
foot diameter to every 49 feet of distance. The
further away the object, the more ambient air
and particles in the air influence the temperature
reading.
CAUTION:
Direct Digital Readout is an
informational tool ONLY. The accuracy of the
temperature readout is subject to many variations
- emissivity, distance, ambient air temperature, etc. -
and should not be used as an absolute.
3.10.2 The Temperature Scale Readout system is a
non-contact temperature measurement feature that
allows firefighters to estimate the surface temperature
of objects from a remote location.
3.10.2.1 Temperature Scale Readout is an
optional feature of the ISI 3500.
3.10.2.2 The temperature scale is displayed
on the right side of the screen and ranges from
0ºF to 1200ºF (0ºC to 600ºC) with graduations
marked every 300ºF (150ºC).
3.10.2.3 To measure the approximate
temperature of an object, place the crosshairs on
the center of the object and read the approximate
temperature on the scale. The Temperature Scale
Readout takes a one foot diameter to every 49
feet of distance. The further away the object, the
more ambient air and particles in the air influence
the temperature reading.
3.8.4.2 The battery is fully charged and in trickle
mode when the red (R), yellow (Y), and first
green (G1) LED are lit with the second green
(G2) LED blinking. Should the “charger fault
condition” appear (R LED blinking), the charger
is not working properly and needs repair.
Should the “battery fault condition” appear
(the R, Y, and G1 LED blinking), the battery is
no longer usable and should be disposed of
properly.
3.8.4.3 A battery will take approximately
two hours or less to charge under normal
conditions.
3.8.4.4 Each LED when continually lit signifies
a portion of charge status as indicated on the
labels.
3.9 DIRECT DIGITAL READOUT - ISI 2500
3.9.1 The Direct Digital Readout system is a non-
contact temperature measurement feature that allows
firefighters to estimate the surface temperature of
objects from a remote location.
3.9.2 Direct Digital Readout is a standard feature of
the ISI 2500.
3.9.3 The temperature is digitally displayed on
the screen in the bottom right corner. (See Image
3.10.1.1)
3.9.4 To measure the approximate temperature of an
object, place the crosshairs on the center of the object
and read the digital readout. Direct Digital Readout
takes a one foot diameter to every 49 feet of distance.
The further away the object, the more ambient air
and particles in the air influence the temperature
reading.
CAUTION:
Direct Digital Readout is an
informational tool ONLY. The accuracy of the
temperature readout is subject to many variations
- emissivity, distance, ambient air temperature, etc. -
and should not be used as an absolute.
Internal Charger Label
crosshairs
bar
temperature
readout
digital
temperature
readout
!
!
