Cycle through the currently measured temperature and the maximum
and minimum recorded temperatures by repeatedly pressing the record
button. Icons will appear on the display to indicate which mode you
are viewing:
• Maximum (REC and MAX icons)
• Minimum (REC and MIN icons)
• Current Temperature (REC icon only)
M a i n t e n a n c e
Periodic service
WARNING!
Repair and service of this instrument is to be performed by qualified
personnel only. Improper repair or service could result in physical
degradation of the meter. This could alter the protection from
electrical shock and personal injury this meter provides to the
operator. Perform only those maintenance tasks that you are
qualified to do.
These guidelines will help you attain long and reliable service from
your meter:
1. Calibrate your meter annually to ensure it meets original
performance specifications.
2. Keep your meter dry. If it gets wet, wipe it dry immediately. Liquids
damage electronic circuits.
3. Whenever pra c t i cal, keep the meter away from dust and dirt, which
can cause premature wear.
4. Although your meter is built to withstand the rigors of daily use, it
can be damaged by severe impacts. Use reasonable caution when
using and storing the meter.
NOTE: When servicing the meter, use only the replacement parts specified.
Battery: 9V, NEDA 1604 or IEC 6LR 61
Cleaning and Decontamination
Periodically clean your meter’s case using a damp cloth. DO NOT use
abrasives, cleaning solvents or strong detergents, as they may damage
the finish or affect the reliability of the structural components.
Battery Replacement
Always use a fresh replacement battery of the specified size and type.
Immediately remove the old or weak battery from the meter and
dispose of it in accordance with your local disposal regulations. Old or
defective batteries can leak chemicals that corrode electronic circuits.
WARNING!
To avoid electric shock, be sure to turn off the meter’s power before you
remove or install batteries.
To install a new battery, follow these procedures:
1. Remove the thermocouple from the top of the instrument.
2. Remove the rubber boot by sliding the instrument out toward the
top faceplate cut-out.
3. Lay the instrument face down on a clean, flat surface.
4. Remove the battery cover.
• Apply inward pressure on the side of the battery cover at the
recessed point, toward the slit, while sliding it out.
5. Remove and replace the battery, observing indicated polarity.
WARNING!
Under NO circumstance should you expose batteries to extreme heat or
fire as they may explode and cause injury.
NOTE: If you do not plan to use the meter for a month or more,
remove the battery and store it in an area that won’t be damaged by a
leaking battery.
Calibration
When properly maintained, your DT150 will maintain an accuracy
specification of up to 0.1% of the reading. To ensure your instrument
is performing at its peak, send it to the UEi factory or a qualified
instrument calibration facility for annual calibration.
Tro u b l e s h o o t i n g
This instrument contains no user serviceable parts beyond those listed
in the troubleshooting table. In the event your instrument is physically
damaged or does not function properly after taking the listed action,
please return the instrument to UEi following the warranty and
service instructions.
DTO150-MAN P. 3