Major tech MT22, Instruction Manual

1.  If you wish to measure temperature in °F, set the function switch to 

the °F range. If you wish to measure temperature in °C, set the 
function switch to the °C range.

2.  Insert the black test lead banana plug into the negative (COM) jack 

and the red test lead banana plug into the positive (V) jack, making 
sure to observe the correct polarity. 

3.   Touch the Temperature Probe head to the part whose temperature 

you wish to measure. Keep the probe touching the part under test 
until the reading stabilizes (about 30 seconds). 

4.   Read the temperature on the display. The digital reading will indicate 

the proper decimal point and value. 

6.13. TEMPERATURE MEASUREMENTS

WARNING:

 To avoid electric shock, disconnect both test probes 

from any source of voltage before making a temperature 
measurement.

1.  When the batteries become drained or drop below the operating 

voltage, “BAT” will appear in the right-hand side of the LCD display. 
The battery should be replaced.

2.  Follow instructions for installing battery. See the Battery Installation 

section of this manual.

3.    Dispose of the old battery properly.

6.14. REPLACING THE BATTERY

6.15. BATTERY INSTALLATION

WARNING:

 : To avoid electric shock, disconnect the test leads from 

any source of voltage before removing the battery cover.

1.  Disconnect the test leads from the meter.
2.  Open the battery cover by loosening the screw using a phillips head 

screwdriver.

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WARNING:

 To avoid electric shock, be sure the thermocouple has 

been removed before changing to another measurement function.

WARNING:

 To avoid electric shock, disconnect the test leads from 

any source of voltage before removing the battery door.

WARNING:

 To avoid electric shock, do not operate your meter until 

the battery cover is in place and fastened securely.