ppbrae & MiniRAE 2000 Service Training Firmware v 1.25(rev B)

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Ashley Owens
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1 ppbrae & MiniRAE 2000 Service Training Firmware v 1.25(rev B)

2 Training Agenda: Upgrades Explanation of Duty-Cycle Diagnostic Mode Getting into Programming Calibration Inside the MiniRAE 2000/ppbRAE Configuration and Personal settings

3 Upgrades for ppbrae & MiniRAE 2000 Firmware upgrade with new Flex-I-probe (ppbrae) Must be done at the factory PN 025_firmware_upgrade Costs $ Lamp housing upgrade (Both) Must be done at the factory PN Costs $ ppbrae+ upgrade Must be done at the factory PN Costs $395.00

4 Lamp Housing Upgrade Major gains in humidity performance New teflon inserts reduce conductivity Can be upgraded Must be done at the factory! ATEX approved No Teflon Insert Teflon Insert

5 Training Agenda: Upgrades Explanation of Duty-Cycle Diagnostic Mode Getting into Programming Calibration Inside the MiniRAE 2000/ppbRAE Configuration and Personal settings

6 Combating Long-Term PID Drift As the lamp surface gets dirty the light getting out of the lamp will be obscured and the PID signal will be reduced. If the PID was initially calibrated on 100 ppm isobutylene and suffered loss of signal drift from a dirty lamp then the PID might only read ppm when challenged with 100 ppm isobutylene. This would be a 20-30% loss of signal.

7 PIDs for Continuous VOC Monitoring Stopping for 4 hours of cleaning just is not practical and calibrating daily, weekly or even monthly can be too labor intensive. In duty cycling while the PID runs continuously the pump runs intermittently at some user defined duty cycle. The pump runs then turns off while the lamp remains on to clean the sensor and lamp surface. When concentration exceeds 2 ppm the pump runs continuously until the sensor is cleared.

8 PIDs for Continuous VOC Monitoring The user can set the cycle period from % of a 10 second interval. If set to 90% then it is on 9 seconds off 1 seconds. If set to 50% then it is on 5 off 5 seconds. Duty cycling will reduce loss of span sensitivity to typically less than 5% running 24 hours a day 7 days a week for over 90 days in backgrounds of less than 10 ppm.

9 Training Agenda: Upgrades Explanation of Duty-Cycle Diagnostic Mode Getting into Programming Calibration Inside the MiniRAE 2000/ppbRAE Configuration and Personal settings

10 Diagnostic Mode Turning the unit on in Diagnostic Mode: With MiniRAE 2000/ppbRAE turned off, hold down Y/+ key While still holding Y/+ key, depress and hold the MODE key. Hold both keys down for 2 seconds, the unit will beep and then release

11 Diagnostics: Raw PID Sensor Output 1A MiniRAE 200 ppbrae Main display in Diagnostic Mode. MiniRAE 2000 has four amplifiers, 1A, 10A, 1B, 10B. 1B and 10B are not currently in use ppbrae plus uses all four amplifiers

12 Diagnostics: Raw PID Sensor Output 10A B10 A10 MiniRAE 2000 ppbrae ppbrae In fresh air the RAW reading should be within the indicated range Fresh air values significantly below the range could be due to an electronic problem. Fresh air values significantly higher, generally indicate a shorted or dirty sensor

13 Diagnostics: Raw PID Sensor Output 10A B10 A10 MiniRAE 2000 ppbrae ppbrae With span gas applied, the RAW reading should be within the indicated range Span gas: 100 ppm Isobutylene for MiniRAE ppm Isobutylene for ppbrae

14 Diagnostics: Raw Sensor Delta Values 10A >200 >100 > 400 MiniRAE 2000 ppbrae Determine Delta by subtracting span value from fresh air value If Delta value is less than that shown above, the Lamp or the PID sensor may need to be replaced

15 MiniRAE 2000: Lamp Test Last= 132 Unit reads Check Lamp? Answer Y/+ Instrument will run through a self-diagnostic on lamp If it passes, it will give you a reading, if it fails, it will tell you Bad Lamp

16 ppbrae: Reset Lamp Failure Threshold Turn off instrument Remove PID sensor and lamp Install PID sensor Turn unit on in Diagnostic Mode Press Mode until you reach Lamp = screen and write down the value Press Mode once and set the Fail to 8-10 counts above the Lamp value, using the Y/+ and N/- keys Press Mode and the Y/+ if you have made a change Turn off ppbrae

17 ppbrae: Reset Lamp Failure Threshold Install lamp and PID sensor Turn unit on in Diagnostic Mode Press Mode until you reach Lamp = screen Verify that Lamp In value is higher than Lamp Out value If value has not increased, replace lamp If value has increased, continue Press Mode, Lamp = value should be higher than Fail = If the value is only a few numbers higher, replace lamp Otherwise, continue

18 MiniRAE 2000: Reset Lamp Failure Threshold After running Check Lamp?, press Mode until you reach Lamp = Record the Lamp value with the lamp in Remove the lamp and sensor Record the Lamp value with the lamp out Add the Lamp-In and Lamp-out values and divide by two Install lamp and sensor Press Mode

19 Diagnostics: Lamp Failure Threshold Lamp= 83 Fail= 65 Use the Y/+ and N/- key to adjust the Fail Set Fail to the number calculated from the Lamp-In and Lamp-Out values Press Mode to save

20 Lamp/Sensor Issues Lamp does not light (ref. TN-146) Replace Lamp Replace Lamp housing High readings in Fresh Air, exposed to sample, or with rapid movement or moisture (ref. TN-163) Clean/Replace Sensor Clean/Replace Lamp Housing Clean Lamp Check Correction Factor/ Cal Memory Failed Span calibration Replace Lamp Replace Sensor Lamp Alarm Replace Lamp Reset Lamp Failure Threshold If you have firmware version 1.22A and lamp or unit is new, call for firmware 1.25 to upgrade or download off website (MiniRAE 2000)

21 MiniRAE 2000: PID Sensor Inspect sensor for damage and replace to rectify the following conditions: Bent electrode fingers Teflon mask warped so that sensing electrode shows Electrodes not in the same plane If problems persist, replace PID sensor Bent Electrode Straight Electrodes with mask removed for clarity Teflon Mask Warped

22 Maintenance Clean PID Lamp & Sensor When display creeps upwards after good zero When PID responds to moisture When movement of PID results in response on display Clean Sensor Bias Electrode Dirty Sensor Bias Electrode Sensing Electrode No dirt build-up to foster a decrease in airspace resistance Sensing Electrode Dirt build-up absorbs water and breaks down airspace resistance leading to sensor leakage or moisture response

23 Humidity Check Cup hand over inlet or breathe into inlet for seconds Do not block flow If M2K reads >2 ppm or ppbrae reads >500 ppb, then the sensor needs cleaning Maintenance

24 Maintenance How to Clean PID Sensor Always clean sample probe and replace or clean filters FIRST! If PID holds a stable zero after this step then further cleaning may not be necessary Use anhydrous methanol (Lamp cleaning solution), never use water Clean lamp face with lens tissue do not touch with your bare hands

Maintaining PID Sensor Cleaning the PID Sensor Clean sensor by immersion in cleaning solution Do not loosen or remove screws on PID sensor Remove the o-ring from the PID

25 Maintaining PID Sensor Cleaning the PID Sensor Clean sensor by immersion in cleaning solution Do not loosen or remove screws on PID sensor Remove the o-ring from the PID sensor If Ultrasonic Cleaner is not available Immerse in cleaning solution and agitate by hand Drying the PID Sensor Let air dry overnight Warm air (not hot) will speed drying

26 Humidity Filtering II Tubes Flex-I-Probe (p/n ) Tube Tip Breaker Tube Adapter (p/n ) Humidity Filtering II Tube (10-pack, p/n ) Temporary relief for a dirty sensor Dries sample gas for about ½ hour Measure VOCs; multiple sample use OK Useful for gasoline and chlorinated solvents CAUTION: May cause low response for some compounds or at low temperature or concentration

27 Diagnostics: Lamp Driver Ldrv= 230 Ldrv shows the value of the Lampdriver as calibrated at the factory This can be adjusted in the field, but the optimal value is the original setting Each time unit calibrates, instrument will reset the lampdriver

28 Diagnostics: Battery Ni-Cd/MH This screen shows which type of battery is installed. NiMH or Alkaline are available (very early units may have NiCad)

29 Diagnostics: Display Contrast CONTRAST In cold weather the display may fade prematurely and in hot weather the display may bleed Use Y/+ key to increase contrast and N/- key to decrease contrast. Press the MODE key to accept

30 Diagnostics: Battery Duration Test Battery Duration xx : xx Shows the run time of the last time the instrument turned itself off due to a low battery This is useful for battery life testing Charge battery completely Turn unit on and allow to run until battery dies Charge unit again and turn on in Diagnostic mode

31 Diagnostics: Adjust Pump Stall Pump = 8/ 8 Typical pump current without blockage should be between If there is a noticeable difference between pump current there may be a blockage or the pump needs to be rebuilt

32 Diagnostics: Adjust Pump Stall Stall 12 If the gas inlet is blocked but the pump does not stall (and no internal hoses are disconnected), or the pump shuts down too easily with just a slight blockage, the pump stall threshold may need adjustment.

33 Diagnostics: Adjust Pump Stall Typical pump current without blockage should be between 6-10 Block the pump inlet, if the pump current reading does not increase by more than 5 counts there may be a leak in the tubing or the pump is weak. With the inlet blocked, increase the stall value until it is about 5-8 counts above the unblocked reading using the Y/+ and N/- keys. Press MODE to Save new stall threshold Press Y/+ to confirm ( N/- or MODE will abandon the change)

34 Pump Issues Pump does not stall Adjust Pump Stall Threshold Check tubing for leaks Rebuild/clean pump Unit respond slowly to gas or Unit calibrates OK but doesn t see gas sample Check tubing for leaks Rebuild/clean pump

35 Diagnostics: Motor Drive adjustment Mdrv = 250 Normally, the user does not adjust this parameter

36 Diagnostics: DAC output counts DAC = 2048 This menu allows the user to check the DAC analog output

37 Diagnostics: Alarm Test Alarm On? To test the monitor s alarm generators, including LEDs, buzzer and remote alarm answer Y/+ and the buzzer will stay on until pressing the N/- key

38 Diagnostics: Adjust Backlight Trip = 112 Automatic backlight trigger threshold, when "Lite = drops below this value the backlight will automatically come on To turn off the backlight set this value to 00

39 Communicate with PC Display PC Comm? If Y/+ key is pushed then instrument will display Monitor will Pause. OK? If Y/+ key is pushed again the unit will display ready... after 60 seconds, unit will no longer communicate with PC Tap MODE key to return to Main Display

40 Return to Normal Run To confirm that the changes made in Diagnostic Mode are correct, you can return to normal run mode without turning off the MiniRAE 2000/ppbRAE While in Diagnostic Mode at the main RAW number screen simultaneously hold down the Y/+ and the MODE keys for 3 seconds The instrument will toggle to normal mode You can toggle back to Diagnostic mode by repeating this key sequence You cannot enter Diagnostic Mode from normal run mode

41 Training Agenda: Upgrades Explanation of Duty-Cycle Diagnostic Mode Getting into Programming Calibration Inside the MiniRAE 2000/ppbRAE Configuration and Personal settings

42 Getting Into Programming Hold MODE and N/- keys for 5 sec. to get in Programming Mode If MiniRAE 2000 asks a question? Answer Y or N To Accept or Escape Use MODE Key When entered from Diagnostic Mode, users have full access to Programming Mode

43 Training Agenda: Upgrades Explanation of Duty-Cycle Diagnostic Mode Getting into Programming Calibration Inside the MiniRAE 2000/ppbRAE Configuration and Personal settings

44 General Calibration Procedure Prior to daily use, it is good practice to perform a Fresh Air/Zero Calibration After Calibration, test for moisture response If readings increase more than 5ppm, clean lamp & sensor If readings do not increase higher than 5ppm, continue with pump stall test If unit passes, test pump to verify it will stall, if pump does not stall, service the pump Check Stall Threshold Check tubing Clean/rebuild pump or replace

45 MiniRAE 2000 : Calibration After performing service it is always important to calibrate the MiniRAE 2000 Fresh air/zero calibration Make sure air is clean or use zero gas adapter From firmware v1.20 and on ppbraes do not use an electronic zero always use Zero Grade Air or VOC Zeroing Kit Reference TN-150

46 MiniRAE 2000 : Calibration Span Calibration Memory 0 Always uses Isobutylene to Calibrate Reads Span Value in Calibration Mode (100 ppm IBE = 100) Reads Span Value x CF in Measure Mode (100 ppm IBE = 53 w/benzene CF) Operates like MultiRAE except you cannot change Cal gas, only change Measure gas Memories 1-7 Don t calibrate if you want to use a CF Normally does not use a CF even though it is displayed (CF = 1) Normally calibrate with same gas as measured requires standard gases for hexane, benzene, etc. or whatever you are measuring, (CF = 1) Reads Span Value in Calibration Mode (50 ppm Benzene = 50) Reads Span Value in Measure Mode (50 ppm Benzene = 50)

47 MiniRAE 2000 : Cal Memory Function Mem 0 Mem 1 Mem 2 Mem 6 Mem 7 Cal Gas IBE Gas 1 Gas 2 Gas 6 Gas 7 Meas Gas Gas 0 Gas 1 Gas 2 Gas 6 Gas 7 Displays CF? Yes Yes Yes Yes Yes Uses CF if Mem is Calibrated? Yes No No No No Uses CF if Mem is not Calibrated? Yes Yes Yes Yes Yes

48 Training Agenda: Upgrades Explanation of Duty-Cycle Diagnostic Mode Getting into Programming Calibration Inside the MiniRAE 2000/ppbRAE Configuration and Personal settings

49 MiniRAE 2000 Top Assembly Filter history Housing Lamp Housing 1 1/8 O Ring PID Sensor Porous Metal Filter Green dust filter was originally used, but proved not to work effectively C filter was used next but proved to absorb too many VOCs Now only porous metal filter is used 3/8 O Ring Sensor Adapter Lamp Housing Cap

50 Inside the MiniRAE 2000

51 Training Agenda: Upgrades Explanation of Duty-Cycle Diagnostic Mode Getting into Programming Calibration Inside the MiniRAE 2000/ppbRAE Configuration and Personal settings

52 UsingProRAE Suite Updating Firmware ConfigAll Always run Config All with upgrade of firmware Editing Configuration Files Upgrade to Datalogging

53 Questions?

MultiRAE Service Training. Firmware v 3.21B

MultiRAE Service Training. Firmware v 3.21B MultiRAE Service Training Firmware v 3.21B Training Agenda: Firmware Overview Repairs Allowed Turning unit on in Diagnostic Mode Diagnostic Mode Program Mode Configuration and Personal settings The new