Dickson TH8P2 Manuale - Pagina 6
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Troubleshooting
Why isn't the chart keeping time or running slow?
The chart may be "hung up" or restricted, possibly caused by a rip on the outer edge of the chart or the chart hub, or the
chart may be caught between the arm and pen arm platform.
Incorrect chart installed for the selected chart speed
Why did the chart stop turning?
Chart hung up or restricted, (ripped chart)
Unit may be "locked up"
This can be confirmed by pressing any of the buttons on the keypad. If the unit is locked up there will be no response to button
presses and the Chart Recorder may appear to be working, but the readings won't change. Also, the chart will not rotate.
Remove power and battery, and then re-power.
Why don't the display and chart match?
Dip switches are set for a specific range, but using chart for another range, or vice versa.
Pen(s) not inserted on pen arm(s) all the way
To adjust pen to match chart see Pen Adjust in the Need to Know section of this manual.
Note: TH8P0 does not have a display.
Why does calibration seem to be off?
What is the tolerance of the unit it's being compared to?
It's ok if the unit is within the sum of the two tolerances.
Has an outside calibration house attempted calibration? It may not have been adjusted properly.
Walk through calibration adjustment, found in the manual
Why won't the battery backup work?
Are there good batteries in the Chart Recorder?
Keep in mind that battery backup varies significantly depending on temperature, pen movement and chart rotation speed.
If there was a momentary power outage (brown out), the unit may not have had enough time to recognize this and switch to
Battery Mode. (The Chart Recorder may lock up or shut off in this situation). This situation may also occur if the unit is
plugged into an outlet that shares the circuit with other machinery that has phase motors or compressors that cycle
periodically. As these other machines cycle, they momentarily have a high current draw, therefore drawing from the unit.
Note: TH8P0 does not have a battery backup.
Why won't the chart recorder respond to changes?
Is the unit "locked up"? This can be confirmed by pressing any of the buttons on the keypad. If the unit is locked up there will be
no response to button presses and the unit may appear to be working, but the readings won't change. Also, the chart will not
rotate. Remove power and battery, and then re-power.
Why won't the unit power up?
Remove the batteries and power adapter for a minute to reset the unit. The unit should respond when the adapter is plugged in.
Warranty
Dickson warrants that this line of instruments will be free from defects in material and workmanship under normal use and
service for a period of twelve months after delivery. This warranty does not cover routine calibration and battery replacement.
For Specifications and Technical Support go to www.DicksonData.com