Functional Testing; Read Mode Testing; Max & Min; Source Mode Testing - Altek 222A Quick Start Manual

FUNCTIONAL TESTING

Each feature of the Model 222A should be tested for proper function.

READ MODE TESTING:

Connect a known good thermocouple to the leads of the Model 222A.
Place all dip switches down (dsw1-dsw4) and turn the unit on to READ. With the QUIK-CHEK
switch in the READ position, push the RESET button to reset the MAX and MIN.
Expose the thermocouple to temperatures above and below room temperature (a hot and a cold cup
of water, oven, refrigerator, etc.) and observe that the displayed temperature rises and falls.
MAX & MIN
Move the QUIK-CHEK switch to both the MAX and the MIN position and observe that the higher
temperature is stored in the MAX position, the lower is stored in the MIN position.
Press the RESET button with the QUIK-CHEK switch in the READ position.
Move the QUIK-CHEK switch to the READ, MAX, and MIN positions and observe that all
positions read the same temperature.
Turn the Model 222A off.

SOURCE MODE TESTING:

Storing QUIK-CHEK Values

Turn the unit on to SOURCE.
With the 222A QUIK-CHEK switch in the HI position, dial the knob clockwise and observe that the
temperature on the display increases. Observe that turning the knob faster causes the display to
increase more rapidly.
Continue turning the knob until an easily remembered value appears on the display (1000 for
example), and press the STORE button to store the value. The display should flash once indicating
that the value is stored.
Move the QUIK-CHEK switch to the LO position.
Repeat the same procedure moving the knob counterclockwise to an easily remembered value (-100
for example), and press the STORE button. The display should flash once indicating that the value is
stored.

Recalling QUIK-CHEK Values

Turn the Model 222A off.
Turn the Model 222A on in SOURCE.
Move the QUIK-CHEK switch to the HI and the LO positions, verifying that the Model 222A has
recalled the previously stored values.
Turn the Model 222A off.
The user's dip switch positions should be restored at this time. Please refer to table 1 for the recorded
positions.
If the unit should fail to meet any of its stated specifications after recalibration, it should be returned
to the factory for repair.