Hardy HI 3010 Filler/Dispenser Controller - Manual (Page 139)

123 CHAPTER 7
Troubleshooting
Step 9. Press the Exit button to return to the Choose Dis-
play.
Step 10. Press the Exit button to return to the Diagnostics
Display.
Stability Test
The Stability Test switches a fixed signal into the analog to
digital convertor, and calculates the mean squared variation
from the average reading, using 100 samples.
The test passes if the mean squared variation is less than 5.0,
and the average reading is between 30237 and 36955.
Step 1. Press the up or down arrow buttons until the cursor
is in front of Stability Test. (See Fig.7-76)
FIG. 7-76 DIAGNOSTICS DISPLAY/SELECTING
STABILITY TEST
Step 2. Press the Enter button. The Information display
appears “SYS. STABILITY TEST, PRESS ENTER
TO START”. (See Fig. 7-77)
FIG. 7-77 STABILITY TEST DISPLAY
Step 3. Press the ENTER button to perform the stability
test.
• If the instrument passes the Stability Test
the Pass display appears. (See Fig. 7-78)
This means that the Mean Squared Varia-
tion is less than 5.0 and the average read-
ing is between 30237 and 36955. In short
the instrument is working fine.
FIG. 7-78 SYSTEM STABILITY TEST DISPLAY/
PASS
• If the instrument does not pass the Stabil-
ity Test the Fail display appears. (See Fig.
7-79) This means that the Mean Squared
Variation is greater than 5.0 and/or the
average reading is not between 30237 and
36955. This test examines the internal
electronics and not the load cells input sig-
nal.
FIG. 7-79 SYSTEM STABILITY TEST DISPLAY/FAIL
NOTE: In our example we show that the Means squared
variation is greater than 5.0 but the average
reading is within tolerance.
1. Disconnect the power cord and recon-
nect the power cord to restart the
instrument.
2. Repeat the Stability test.
3. If the instrument Fails the Stability
Test again, contact Hardy Instruments
Inc., Technical Support for assistance.
Step 4. Press the Exit button to return to the Diagnostics
display.
Factory Defaults
CAUTION: I F YOU CHOOSE FACTORY DEFAULTS ALL
DATA WILL BE LOST ! M AKE ABSOLUTELY SURE THAT THIS
IS WHAT YOU WANT TO DO BEFORE CHOOSING THIS
OPTION . DO NOT USE THIS FUNCTION IN AN EFFORT TO
CORRECT ANY MALFUNCTIONS IN THE OPERATION OF THE
INSTRUMENT .
Step 1. Press the up or down arrow buttons until the cursor
is in front of Factory Defaults. (See Fig. 7-80)