User manual

Setup and Operation

1. Press Power on/off button to turn the unit on. The value immediately

shown is the number of data logging sample points remaining (from

18,000 to 0). After one second, the display will then switch to the

temperature measurement reading mode.

2. Press MAX/MIN button to step through the maximum, minimum, and

average readings. To exit the Max/Min/Avg mode, press MAX/MIN but-

ton for three seconds to return to normal operation.

3. Press °C/°F/K button to switch between Celsius (°C), Fahrenheit (°F), and

Kelvin (K).

4. Press HOLD button to freeze or unfreeze the displayed readings. The

screen shows the HOLD icon.

5. Use the DIF/T1–T2–T3 button to toggle between showing the T1 (type K),

T2 (type K), T3 (infrared), and T1–T2, T1–T3, T2–T3 (temperature differen-

tials) measurement in the primary, secondary, or tertiary display.

6. Press Setup/Backlight button to turn on the backlight. Press it again to

turn off the backlight. Press Setup/Backlight button and hold for three

seconds to enter or exit the Setup mode. (See "Changing Setup Options")

7. Press  or Rec/ button to scroll to the Setup option you want to

change. Press  button to increase the displayed setting.

8. Press Rec/ button to start recording and press again to stop recording.

If entering a Setup option, scroll to the Setup option you want to change.

Press Rec/ button to decrease the displayed setting.

9. Press ENTER button to enter a Setup option. Press ENTER button again

to store the new setting into memory.

Using Thermocouple Input(s)

1. Plug the type K thermocouples into the T1 and T2 input connectors.

2. After one second the thermometer displays the ﬁrst readings (T1

on upper display, T2 on secondary display). If no thermocouple is

plugged into the selected input or the thermocouple is not properly

connected, the display will show "- - - -". If the temperature being

measured is outside the unit’s valid range, the display will show

“OL” (overload).

Using Infrared Input

1. Purchase optional infrared wand (model 20250-24), shown at right.

2. Plug the IR wand into the T3 (IR) input connector. “T3 - - - -” will

show on screen. If the IR wand is not connected, “T3 - - - -” is not

shown on the screen.

3. Press the SCAN button on the IR wand to begin measuring and the

IR (T3) measurement will be shown on the screen.

Optional IR

wand 20250-24