Operators’ Manual Monroe Electronics, Inc. Model 288B Charge Plate Monitor P/N 0340174 288-1/100 V2.10 022713 100 Housel Ave PO Box 535 Lyndonville NY 14098 1-800-821-6001 585-765-2254 fax: 585-765-9330 monroe-electronics.
CONTENTS Specifications Section 1 Specifications Accessories included What this instrument does Physical description Page 4 Page 5 Page 6 Page 6 General Information Section 2 CAUTION – SHOCK HAZARD Setup – First things first Page 7 Section 3 SETUP SYSTEM Menu SETUP for Manual Test Menu SETUP for Auto Sequence Menu SETUP OPTION Menu Operation Page 8 Page 9 Page 9 Page 9 Page 10 Section 4 Manual operation Programming features for manual test Automatic operation Programming features for auto sequ
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Section 1 Specifications All specifications are referred to plate voltage unless otherwise specified. Display 240 x 64 character/graphic Voltage Accuracy Resolution 3½ digit display (Decay and Peak reading) ±0.1% of reading ± 3 lsd 1 volt for readings > 99 volts 0.1 volt for reading < 100 volts Time Accuracy Resolution 4 digit display 0.1% of reading ± 1 lsd 0.
Charge Plate Capacitance Zero Drift Self Discharge 20 pF ±10% < 100 mV /sec (no incident ion flow) < 200 mV/sec Peak Detector Balance Test Bandwidth <10HZ (pulse width >50msec less 10% error typ.
What this instrument does — This instrument is a charged-plate monitor for evaluating the performance of ionization systems. As such, it performs positive and negative decay tests, and balance (offset voltage) tests to determine if an ionization system is operating effectively. It can be used to test all types of ionization systems as described in ESD Association Standard ANSI/ESD STM3.1 Ionization.
Section 2 GENERAL INFORMATION Model 288 performs manual or automatic decay and balance tests for qualification and periodic verification of ionization equipment. It then stores the results and balance averages for manual tests and complete automatic test sequences up to a maximum of 1500 tests. Temperature and relative humidity are displayed real-time and recorded with the test data. All instrument functions are controlled by five key pushbuttons.
Section 3 SETUP First things first Upon power up, you are presented momentarily with an identification screen, which includes the software revision level and serial number of your unit. Within a few seconds, the MAIN screen (Figure 1) is presented. This screen should show current date and time, ambient factors, power source information and current test number and prompt the operator to “Select Operation”. The test-numbering scheme begins with 1500 and displays the number of remaining tests. Figure 1.
RAM/EE – The first screen under this option asks, “Clear all test data – Y/N?” A “Y(es)” response will permanently erase all accumulated test data from memory. The next two windows prompt a similar decision for whether to restore defaults to Group/Location names and test setups. These decisions should not be taken lightly as deletions are irreversible. S/N – Displays software revision number and instrument serial number. These cannot be modified.
SETUP - OPTION Menu: Options are for display backlighting, power off, and beep settings. The first two options will apply when the 288 unit is running on battery. Figure 6. Setup – Option SETUP OPTION The first two options apply to when the 288 unit is using battery power. Backlight . Auto DC Power Off Beep On Test & Key NEXT EDIT Highlight and press EDIT to view further options. EXIT Figure 7. Setup – Option - Backlight The (A>) symbol indicates the current choice.
Section 4 OPERATION MANUAL OPERATION: From the manual screen the user can choose to run a positive decay, negative decay or balance. Also the option exists to enter the group and location screen to select the proper designation for the ionizer under test. See Figure 8 below: Figure 8. Manual Test Screen. From the MAIN screen (Figure 1), press MANUAL key: M.Setup 1 is currently set as default for use. You may select other setup from MAIN – SETUP – MANUAL.
Figure 10. +Decay Test Result: M +DECAY 06/18/08 11:23:02A 6.5 S StartV Stop V MaxDcy Group A Location 1 30C 56%RH MANUAL: go back to MANUAL screen. +DECAY: start a +Decay test. REVIEW This shows the test result 1000v 100v 300s REVIEW: review the test results. MANUAL +DECAY REVIEW: displays the manual test results and settings as in Figure 11. Setup for this test Figure 11. Review manual DATA Group A Location 1 1000-100v 06/18/08 11:23:02A 30C 56%RH BalDu 60s M+D M-D BAL 6.5s 6.3s +VP=+00.
of the display will flash, which signifies that the average voltage computation has overflowed and is no longer updating based on new data. The instrument continues to correctly indicate changes to the positive and negative peak voltages, +Vp and –Vp, respectively. Confidence Test – One of the major weaknesses in all CPM’s has been the inability to properly verify the main function of these devices, DECAY.
AUTOMATIC OPERATION: Once the desired test parameters are set up, the user simply selects the “start” button to begin the tests. All the parameters are shown in the automatic screen. Figure 14. Auto Sequence Test ___ From the MAIN screen, press AUTO: AUTO 11:23:02A This shows the current Setup. To change/edit the setup, Press MAINSETUP-AUTO. 06/18/08 StartV 900v A.Setup 1 Stop V 90v Group A ChrgDif 50v Location 2 #DecayCyc 3 TstAvai 1500 DcySeq +-+- Group & Location.
When the auto sequence tests are finished, data will be shown as follows: Figure 16. Auto Sequence Test Review: Group A Location 2 06/22/08 03:32:56P 30C 62%RH 3 +Decay 1 6.5s 2 6.5s 3 6.4s EndV -Decay 6.5s 6.5s 6.5s EndV . MAIN: back to MAIN screen. Av 6.5s 6.5s +Vp=+22.6 –Vp=-12.3 Vav=+04.5 NxtCyc MAIN NxtCyc: highlight the next data row. AUTO: start another auto sequence test.
From the MAIN Screen (Figure 1), press SETUP – AUTO. Then highlight the A.Setup 1, press DISPLAY. The following screen will appear: Figure 17. Setup for Auto Sequence Test: SETUP A.TEST 1 StartV 1000v A.Setup 1 Stop V 100v Last enter ChrgDif 50v 06/12/08 #DecayCyc 3 10:20A DcySeq +-+NEXT PREV EDIT MaxDcy 22s BalDur 12s StrtDly 2s CycDelay 3s Bal(Y/N) Y CANCEL SAVE 16 Press NEXT or PREV to highlight the item, then press EDIT to make changes. When finish, press SAVE to store the new settings.
ADDITIONAL FEATURES: Group and Location – By accessing this screen the tests can be organized to reflect the ionizers’ locations. There are up to 17 Groups available, with a maximum of almost 700 locations. The total number of group/locations available will vary depending on how extensive the tests are for the individual locations (i.e. how many decays are run for each ionizer). Up to 1500 tests may be run.
Figure 19. Review Data: From MAIN screen (Figure 1), press DATA RvwMan: Review Manual test data. See Figure 11. DATA RvwAuto: Review Auto sequence data. See Figure 16. Group A Location 1 TstAvai 1450 RvwMan RvwAuto GRP/LOC: Select group/location. GRP/LOC CLR MAIN CLR: Erase data. MAIN: Back to MAIN screen. Peak Reset – During a manual balance test where Balance Duration has been disabled the M BALANCE will show BalDur=XXXXs which means that the test will run continuously until STOPped.
Section 5 MAINTENANCE Precautions — User maintenance should normally be limited to keeping the instrument clean and free from physical damage. Store the instrument in its protective carrying pouch when not in use. Cleaning — Fingerprints and other contaminants may be removed from the case with a clean lint-free cloth dampened in a 70%/30% mix of clean technical grade isopropyl alcohol and de-ionized water. DO NOT use soap or detergent.
Section 6 REFERENCES Documents associated with ionization: ESD Association Standard — ANSI/ESD STM3.1 –Ionization ESD Association Advisory – ESD ADV3.2 – Selection and Acceptance of Air Ionizers ESD Association (Draft) Standard – ANSI/ESD SP3.3 – Periodic Verification of Air Ionizers ESD Association Advisory – ESD ADV1.0 – Glossary Are available from: ESD Association, Inc. 7900 Turin Rd. Building 3, Suite 2 Rome, NY 13440-2069 Phone (315) 339-6937 Fax (315) 339-6793 eosesd@aol.com http://www.eosesd.
WARRANTY Monroe Electronics, Inc., warrants to the Owners, this instrument to be free from defects in material and workmanship for a period of two years after shipment from the factory. This warranty is applicable to the original purchaser only. Liability under this warranty is limited to service, adjustment or replacement of defective parts (other than tubes, fuses or batteries) on any instrument or sub-assembly returned to the factory for this purpose, transportation prepaid.
RETURN POLICIES AND PROCEDURES FACTORY REPAIR Return authorization is required for factory repair work. Material being returned to the factory for repair must have a Return Material Authorization number. To obtain an RMA number, call 585-765-2254 and ask for Customer Service. Material returned to the factory for warranty repair should be accompanied by a copy of a dated invoice or bill of sale, which serves as a proof of purchase for the material.
