Operation; Input Shutter Switch - Extech Instruments EX623A User Manual

5

Operation

NOTE
Read and understand all Warning and Caution statements in this user manual prior to use.
Set the function switch to the OFF position when the meter is not in use.

5.1 Input Shutter Switch

The input shutter is an important safety feature. If it is damaged or inoperable, do not use
the meter. Contact FLIR for servicing.
Figure 5.1 Input Shutter. Put the switch in the lower position when measuring thermocouple
temperature. Put the switch in the upper position for all test lead measurements.
The input shutter is located between the two test lead jacks on the front of the
meter (item 11, in Figure 3.1). Its purpose is to prevent the user from simulta-
neously connecting thermocouples and test leads to the meter.
When the input shutter is in the DOWN position, the test lead jacks are shut-
tered, prohibiting test lead insertion. Put the shutter in the down position when
connecting thermocouples to the meter.
When the input shutter is in the UP position, the thermocouple input jacks are
shuttered, prohibiting thermocouple insertion. Put the shutter in the up posi-
tion when connecting test leads to the meter.
#NAS100174; r. AA/97578/97616; en-US
CAUTION
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