PRECISION OF VARIOUS TIME PERIODS

TM 5-6635-386-12&P When pressed simultaneously with LOCK, will erase all four memories and will initiate a 1 minute count into all four memories. The displays will each read 65536 if the test signal has been properly processed. This tests all digital circuitry in the tester, but does not test the analog circuitry (high voltage supplies). NOTE After approximately Jul 78, TEST will count 1/4 minute and will display 16384. This shortens TEST time as a convenience. D-ONLY = When pressed, the tester will count Density Only, retaining last moisture count. D- ONLY is cancelled by pressing an Operations Key or by pressing CLEAR. M-ONLY = Same as D-ONLY except that only moisture is counted. 1/4 - MIN Initiates 1/4 minute count cycle. Use for Statistical check per Paragraph (STAT-CHECK) = 1-7. 1/2 - MIN = Initiates 1/2 minute count cycle. 1 - MIN = Initiates 1 minute count cycle. 2 - MIN = Initiates 2 minute count cycle. PRECISION OF VARIOUS TIME PERIODS (Read Para 1-7 through 1-9) NOTE: ALL DISPLAYS NORMALIZED TO 1/4 MINUTE. (in PCF 1/4 1/2 1 2 @ 120#) BS 1.20 .85 .60 .42 AC 1.00 .71 .50 .35 6" .50 .35 .25 .18 Moisture .50 .35 .25 .18 Legend: PCF - Pounds Per Cubic Foot BS - Backscatter AC - Asphaltic Concrete 1-5