Computrac MAX-1000 User's Manual - Arizona Instrument

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15 TROUBLE MESSAGESMessages appear on the display screen when certain internal problems occur. Youwill probably never see one of these messages. However, if one should appear, themessage and its meaning are provided in the following.BAD EPROM CHECKSUMProbable causes:The EPROM is continuously checked against a pre-calculatedCHECKSUM to insure against failure. This message appearsif a discrepancy is detected.Bad EPROM chip.Action: Replace U4.SRAMProbable cause:SRAM chip is continuously checked for proper operationduring program execution. Message generated if error inSRAM detected.Bad SRAM chip.Action: Replace U3.HEATER RUNAWAYProbable causes:Action:HEATER FAILUREProbable cause:Action:Message is generated if the lid is closed and temperatureexceeds 290 o C for 3 seconds. It is also generated if the lid isopen, and the temperature does not decrease according to anexponential model.Failed triac or triac driver (probably both). Alarm cansometimes be generated spuriously if ambient conditionsprevent normal cooling of the heater when lid is up (windcurrents blowing heat back on the RTD).Insure actual failure has occurred. If not, reset system.Troubleshoot heat control system.Message is generated if the heater does not reach the set tempin a prescribed period of time (varied with set temp based onheater model) or starting test with low test temperature atambient temperature.Failed heat control system.Power unit off and back on and attempt second test.Troubleshoot heat control system and/or troubleshoot heaterwiring.64
TEMPERATURE CIRCUITProbable cause:Action:A/D TIMEOUTProbable cause:Action:INTERRUPT STARTUPProbable cause:Action:Message is generated if temperature circuit is not detected.A-to-D failure. RTD failure. Bridge circuit failure. MPUfailure.Troubleshoot temperature circuit. Check RTD connection toboard.Message generated if A/D does not clear in 100mS.Bad A/D. Bad A/D timing circuit.Troubleshoot A/D circuit.Something caused the system to crash and reset.Usually RAM corruption of some kind.Troubleshoot system.65
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USER MANUALCOMPUTRAC ® MAX ® 1000
Page 5 and 6:
PACKING and SHIPPING INSTRUCTIONSTh
Page 7 and 8:
Figure 1 MAX-1000 PACKING DIAGRAMvi
Page 9 and 10:
TABLE of CONTENTSPACKING and SHIPPI
Page 11 and 12:
12 PERFORMANCE VERIFICATION .......
Page 13 and 14:
1 INTRODUCTIONThe Arizona Instrumen
Page 15 and 16:
Location SelectionSelect a location
Page 17 and 18:
2.3.2 Obtain a sample of test mater
Page 19 and 20:
3.4 CONTROLS3.4.1 The front panel c
Page 21 and 22:
3.6.4 After “START” has been pr
Page 23 and 24:
4.1 INSTALLATION OF BALANCE PAN SUP
Page 25 and 26: 4.2 AC POWER CONNECTIONFigure 7 MAX
Page 27 and 28: 4.5 NITROGEN PURGE SETUP4.5.1 Some
Page 29 and 30: 4.7.4 Connect tubing from the conne
Page 31 and 32: 4.10 ENABLE PRINTER OUTPUT4.10.1 Wi
Page 33 and 34: 5 MENU SYSTEM: INSTRUMENT CONFIGURA
Page 35 and 36: 6 “MEMRY” KEY: MEMORY START SEL
Page 37 and 38: 7.1.1 To select a menu item, move t
Page 39 and 40: Test TemperatureThe current setpoin
Page 41 and 42: Start Temp ControlThe START TEMP CO
Page 43 and 44: Some samples contain more than one
Page 45 and 46: The PAN TARE OPTIONS offers the use
Page 47 and 48: ! RESULT DISPLAY OPTIONSTest result
Page 49 and 50: 7.4 CALIBRATION MENU7.4.1 CALIBRATE
Page 51 and 52: connected (IBM or Epson). Select th
Page 53 and 54: tags entered by the operator to ide
Page 55 and 56: ! SYRINGE TESTThis function is usef
Page 57 and 58: 8 “PARAM” KEY: TEMPORARILY CHAN
Page 59 and 60: 9 MISCELLANEOUS MENU MESSAGES9.1 CO
Page 61 and 62: 10.1.4 The final portion of the cur
Page 63 and 64: Figure 54 MOISTURE VS. TEMPERATURE
Page 65 and 66: 11.2.2 The sample should be added e
Page 67 and 68: 12 PERFORMANCE VERIFICATIONPeriodic
Page 69 and 70: eliable results, use a high quality
Page 71 and 72: 13 ROUTINE MAINTENANCEThe MAX-1000
Page 73 and 74: 13.3 SAMPLE PAN SUPPORTThe sample p
Page 75: SYMPTOM DIAGNOSIS REMEDYNo power to
Page 79 and 80: FeatureSpecificationTest DisplayInt
Page 81 and 82: 18 APPENDIX A18.1 PARAMETER DEVELOP
Page 83 and 84: PARAMETER DOCUMENTATION:To ensure o
Page 85 and 86: If smaller standard deviations are
Page 87 and 88: 21 MAINTENANCE CONTRACTArizona Inst
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Computrac MAX-1000 User's Manual - Arizona Instrument

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