Model 421501 Version 1.3 February 2006
3
0.1/1
1
5
4
3
2
6
6
9
8
7
Meter Description
1. Thermocouple
plug
2. LCD
Display
3.
Power ON/OFF button
4.
Resolution select button
5.
Maximum reading mode button
6.
Rubber protective jacket
7.
Unit of measure
o
C/
o
F select key
8.
Backlight activation key
9.
Data Hold key
Note: Battery compartment and Tilt Stand on rear of meter
Operation
Powering the Meter
Turn the meter on by pressing the
POWER
button. If the meter’s display does not switch
ON, check that the 9V battery is installed and is fresh. Press the
POWER
button to turn
the meter OFF.
Connecting a Type K thermocouple
1. Plug a Type K thermocouple into the meter’s input jack (top of meter). This meter
accepts Type K thermocouples with spade plugs (sub-miniature type).
2. If a thermocouple is not inserted to the meter or the probe is malfunctioning, all dashes
"------" will appear on the display. If dashes appear, ensure that the probe is properly
connected. If dashes appear with the probe connected, try another probe.
Taking measurements
With the thermocouple connected and the meter ON, place the thermocouple in air,
touching an object, or in a liquid solution. Read the temperature measurement on the LCD.
Important Note
: The supplied thermocouple can only be used to measure temperature up
to 500
o
F (260
o
C). To measure higher temperatures, a high temperature Type K
thermocouple must be used.
Selecting
o
C/
o
F units of measure
Press the
o
C/
o
F
key to select the desired temperature unit of measure.
Selecting the Resolution
Use the
0.1
o
/ 1
o
button to select the desired resolution. The decimal point location will
reflect each press of the resolution button.
Display Backlight
Press the backlight button (sun symbol) to turn the LCD backlight ON. Press again to turn
it OFF. Backlighting comes in handy in dimly lit areas and for nighttime use.
Data Hold
To freeze the LCD display, momentarily press the
HOLD
button. The 'H' icon will appear
on the LCD when the Data Hold mode is accessed. Momentarily press the
HOLD
button
again to return to normal operation (the 'H' hold icon will switch off).
MAX Temperature Mode
Press the
MAX
button to enter the Max mode (the MAX indicator will appear on the LCD).
The meter then displays only the highest reading. Each time the temperature reading
exceeds the currently displayed value, the displayed value changes and updates to the
new MAX temperature. Press the
MAX
button again to exit the MAX mode.
