Test Products International 275 - Manual (Page 35)

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G. Trouble Shooting
Problem Probable Causes
Does not power up • Dead or defective battery
• Broken wire from battery
snap to PCB
Won’t display DC • Open fuse
microamp readings • Open test lead
•
Improperly connected to
circuit under test
All functions except • Very weak battery that will
ohms read high not turn on the low battery
indicator on the LCD
AC Volts do not read • Very weak battery that will
not turn on the low battery
indicator on the LCD
Non-Contact Voltage • The non-contact voltage feature
does not work works best when used to test a
single wire. Make sure the arrow
on the jaw is pointed at the wire.
The meter beeps when • This is a reminder to remove the
set on TEMP test leads and insert the temper-
ature probe. If a probe is insert-
ed, this is an indication the probe
is open.
AC Amps does not read • Make sure the jaw is clamped
around a single wire and the
device connected to the wire is
turned on.
Application Notes (Temperature Differential)
When measuring temperature there may be applica-
tions when knowing the differential between two mea-
surements is required. This can be accompished by
following these steps.
•
Remove the test leads from the input jacks. Insert
the K-type thermocouple probe into the input jack
on the 275. Set the 275 to the desired TEMP
function.
• Touch the temperature probe sensor to the device
under test (T1).
• When the reading stabilizes, press the REL but-
ton. The display will read “0” and T1 will be
stored as the reference value that the next mea-
surement will be made relative to.
• Touch the temperature probe sensor to the device
under test (T2).
• The 275 will display the differential temperature
T2-T1.