Never operate the Tester with the cover removed or the battery door open. Page Buttons And Indicators Model and 0. Buttons and Indicators Error messages that may appear on the display Indicates an insulation or resistance are described in Table 5.
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That would defeat the purpose. I want us to solve this one. A3 Pics are already available - see connected thread on to conversion below.
But I will take some for identifying the main IC. A4 I measured a 5vdc source Agilent EA using sw position 1 set to dc volts. The unit turned off after 10 minutes and would not come out of this mode by any key press or dial position change. I removed batteries for 30 seconds to restart. A5 I Measured a ohm resistor using switch position 2 set to ohms and used the lock feature to maintain a continuous reading, otherwise I would have had to keep my finger on the Test button.
This time the unit did not turn off. Perhaps using the lock test mode prevents unit from sleeping. The second attempt I pressed the Test button for a few seconds until the reading stabilized then released it to hold the reading. Ater 10 minutes unit went to sleep. A6 Unit turns on and displays the VDC mode. A7 current draw in "on mode" is 6. A8 I Measured a 5. The unit was powered by an Agilent C system dc power supply set to 6. The unit measured the 5.
Then 2 seconds later a strange thing happened. All segments started flashing rapidly for a bout 10 seconds then the display dimmed and finally turned off. Current slowly went to zero. Quickly cycling the unit from OFF to Volts first two switch positions yielded normal behavior.
Occasionally all segments would display before powering down the display completely. I hate it when this happens. I needed to find a cause for the problem I was having, not fix the tester. Perhaps someone can shed light on something I am missing or not understanding. A10 The current draw in both volts and ohms mode when the auto power off occurs is zero or darn close to it as measured with my Agilent C. After the 10 min of inactivity, the unit powers down as before, but this time after a range change or button press it takes about 10 seconds for the unit to again turn on.
Having a strategy is
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