Switch Test Parameters; Switch Test Description - Fluke 914X Serie Manual Del Usuario

4.2.1

Switch Test Parameters

SWITCH TEMP
The SWITCH TEMP parameter is the nominal change temperature of the switch.
UPPER TEMP
The UPPER TEMP parameter is the temperature during a cycle at which the Field Metrology
Well begins to heat or cool at the rate specified in "Scan Rate" found in MAIN MENU|TEMP
SETUP|SETUP|SCAN RATE.
LOWER TEMP
The LOWER TEMP parameter is the temperature at which the Field Metrology Well heats or
cools, in order to begin testing if the test is just starting or the temperature at which the instru-
ment begins to heat to start a cycle.
APPROACH
The APPROACH parameter controls the use of the Scan Rate during the approach to the set-
point. During the test, the controller uses the system Scan Rate until the temperature is within
the approach temperature of either the high temp or low temp parameters.
NO. CYCLES
The NO. CYCLES parameter determines how many times the instrument heats and cools al-
lowing a thermal switch or batch of switches to be tested.
4.2.2

Switch Test Description

CAUTION: The switch, switch wires, switch components and switch accessories can be
damaged if the Field Metrology Well exceeds their temperature limits.
The SWITCH TEST is used to select, set up, execute and view the results of switch tests. The
Switch Test function allows thermal switches to be tested for open and/or close temperatures.
The Switch Test allows for Auto or Manual operation. Figure 13 on next page shows a graphi-
cal representation of how a switch test works.
For Auto operation, enter the Prog Menu. Under Switch Test, select Auto Test. Enter the
SWITCH TEMP. Set the Test Method to AUTO. Exit to the Run Prog menu. Ensure that Run
Test is set to SWITCH TEST. Set Test Status to RUN. Press Enter and the instrument will
engage and start the 3-cycle test within a few seconds. Exit to the main screen to view the test
progress, refer to the Menu Structure.
For Manual operation, in the Temp Setup menu, select Setup and enter the SCAN RATE. Exit
to the Prog Menu. Under Switch Test, select Manual Test. Enter the UPPER TEMP, LOWER
TEMP, APPROACH LIMIT, and NO. CYCLES parameters. Set the Test Method to MANUAL.
Exit to the Run Prog menu. Ensure that the Run Test is set to SWITCH TEST. Set Test Status to
Menu Structure
Prog Menu
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