Omega CL940A, User Manual

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Preparation for Use
2-3
CAUTION
RISK OF INCORRECT READING
Do not use when AC or DC voltages in excess of 1V exist between thermocouple channels (on
instruments with more than one channel). Excessive voltage could result in an incorrect reading,
or in more extreme cases, a blown fuse that will result in incorrect readings and need for repair.
RISK OF INSTRUMENT DAMAGE
Only replace batteries with size AA (IEC LR6, ANSI 15). Observe proper polarity when installing
batteries. Do not mix old and new batteries.
Do not apply voltages across thermocouple leads in excess of normal thermocouple voltage
for the selected range. Excessive input voltage could result in blown fuse, component damage, or
fire. Application of excessive voltage is not covered by the warranty.
Avoid making sharp bends in probe or sensor lead wires. Bending lead wires at sharp angles can
damage the wire and cause probe failure.
When using both thermometer inputs and a voltage differential exists between the two
measurement points, at least one probe should be electrically insulated. If not, a ground-loop
current can flow through the thermocouple leads causing measurement error or instrument damage.
Static discharge through a connected temperature probe may cause instrument damage. Use
care to avoid static discharge when handling the instrument or connected probes.