Monroe Electronics 287a Manual de usuario

Operator’s Manual

Model 287a

Ionizer Performance Analyzer

P/N 0340172

287a-1/100

V1.13

06222017

100 Housel Ave PO Box 535 Lyndonville NY 14098

585-765-2254 fax: 585-765-9330 monroe-electronics.com

CONTENTS

Specifications ............ Section 1..........................Page 1

Specifications ..........................................................Page 1

Accessories included...............................................Page 1

What this instrument does.......................................Page 1

General Information.... Section 2..........................Page 2

Operation

Getting Started, a TutorialSection 3.....................Page 3

Confidence Check —Three steps to get going........Page 3

Further familiarization..............................................Page 4

Test results..............................................................Page 5

The Set-up Menu.....................................................Page 6

Maintenance................ Section 4..........................Page 7

Precautions .............................................................Page 7

Cleaning..................................................................Page 7

Battery.....................................................................Page 7

Calibration...............................................................Page 7

Glossary...................... Section 5..........................Page 8

References.................. Section 6..........................Page 9

Warranty and Repair Information.................Back Cover

Monroe Electronics, Inc.

Printed in USA

Specifications and procedures subject to change without notice.

Section 1

SPECIFICATIONS:

Charger: 1100 volts, selectable polarity

Fieldmeter:

Accuracy 5% of reading, 2% typical

Zero Drift <4V in 90s, 2V typical

Trip points: Fixed 1000V and 100V

Charge plate: 1.7”x4” (10.6 inches periphery)

Capacitance 25pF

Self-discharge <10% of full scale in 200s

Display: 2x16 LCD, >5 updates per second

Timer 200.0s maximum, 0.1s resolution

Fieldmeter 1250V, 1V resolution

Sensors:

Humidity 5% typ. from 10% to 90%RH @25ºC

Temperature 2ºC typical

Oper. temp.: 25ºC, 10ºC

Battery: 9 volt NEDA #1604A or equivalent alkaline (>40 hour life or >1300

charge cycles). Longer life may be achieved by using 9-volt lithium.

Dimensions: 8.1x4x1.9 inches (206x102x48 mm)

Weight: 1lb, 6 oz. (0.63 kg)

Accessories included:

Carrying case

Banana patch cord

Alligator clip with boot

Battery

This manual and a manual supplement

What this instrument does —

Model 287a IPA meets and far exceeds the basic requirements of ESD Association

(Draft) Standard Practice 3.3 for the Protection of Electrostatic Discharge

Susceptible Items –Periodic Verification of Air Ionizers.

Model 287a IPA performs manual or automatic decay and balance tests for periodic

verification of ionization equipment and stores the results and averaged decay times for

up to ten manual tests and up to ten complete automatic test sequences.

Provides real-time measurement and display of temperature and relative humidity.

Performs self-tests.

Battery powered and portable, sets up in seconds.

Section 2

GENERAL INFORMATION

The IPA 287a performs manual or automatic decay and balance tests for periodic

verification of ionization equipment. It then stores the results and averaged decay times for

up to ten manual tests and up to ten complete automatic test sequences. Temperature and

relative humidity are displayed real-time and recorded with the test data.

All instrument functions are controlled by four pushbuttons.

Display contrast can be adjusted via access hole in case back.

In DECAY mode a built-in high voltage generator charges the plate to over 1050 volts.

During the test the plate will discharge toward zero in the presence of ionization. The

elapsed time of decay between 1000 volts and 100 volts is displayed.

USER NOTE —For very fast decay times –faster than one second –ZERO errors may

occur.

In the BALANCE mode, isolated plate voltage, test duration Min and Max voltages are

displayed.

Self-tests include battery check and tests for functional errors.

Memory is non-volatile. Setup and data are retained during battery replacement.

The specifics of usage of the Model 287a for periodic verification of air ionizers are given in

detail in ESD Association (Draft) Standard Practice 3.3 for the Protection of Electrostatic

Discharge Susceptible Items –Periodic Verification of Air Ionizers.

Section 3

OPERATION

Getting Started, a Tutorial

Confidence Check –Three steps to get going —

If you received this instrument directly from the factory, a battery was included but not

installed, memory was cleared and default settings are effective. The following will

familiarize you with your new Ionizer Performance Analyzer Model IPA 287a:

1) Install battery

a) Remove the two crosspoint screws from the battery compartment cover.

b) Carefully lift the cover off of the compartment.

c) Insert the battery, refer to label for orientation.

d) Replace the cover.

2) Demonstrate basic functions. Pressing a single button and releasing within two seconds

controls basic functions.

a) Press and release ‘ON-OFF’. The display will briefly show information about the

instrument and then the battery voltage. A low battery condition will present an error

message.

The main menu startup screen will show a blank voltage, memory usage status,

relative humidity, present temperature and battery voltage.

NOTE —If the instrument has been used it may display the option of clearing the

memory. Do so by scrolling to “Y” with or key then press ‘ENTER’.

b) Press and release ‘AUTO’. This will start the first automatic test sequence:

i) The instrument performs an autozero.

ii) The floating plate is charged to >+1050 volts.

iii) The plate begins to discharge. If allowed to discharge to <+1000

volts the timer will start at +1000 volts.

If discharge fails to reach +1000 volts, ‘Decay failed’ message will be

displayed. Same message will appear if the meter fails to decay to

100 volts within 200 second timer. Test will not be save and

Automatic decay test will be aborted.

iv) This test is the first automatic decay test. The first test in an

automatic sequence is always positive. The test is labeled ‘11+’

(Automatic Test Sequence 1, Test Number 1[in a sequence of 6

tests], and the test voltage is +[positive]).

Abort this test by pressing the ‘AUTO’ button again (‘CANCEL’).

c) Press and release ‘+ CHARGE’. This will start a manual test where the test voltage

is positive.

(i) The instrument performs an autozero.

(ii) The floating plate is charged to >+1050 volts.

(iii) The plate begins to discharge. If allowed to discharge to <+1000 volts

the timer will start at +1000 volts.

If discharge fails to reach +1000 volts, ‘Decay failed’ message will be

displayed. Same message will appear if the meter fails to decay to 100

volts within 200 second timer. Test will not be saved.

(iv) This is a single positive manual decay test. The test is labeled ‘M1+’

(Manual, Test 1, +[positive]).

Abort this test by pressing the ‘CANCEL’ button.

d) Use the ‘CHARGE’ button similarly to perform negative manual decay tests. Up to

ten manual decay tests may be run in any polarity order. The ten tests will be

labeled 1thru 0with the polarity indicated. Thus, the 5th test might be labeled ‘M5’.

3) Shut the instrument off (press and release ‘ON-OFF’). You will need at least an ionizer

and a ground connection to proceed.

Further familiarization —

In order to become more familiar with the accumulation and presentation of data we will

perform two automatic test sequences and a few manual tests and then examine the results:

1. Set up the ionizer.

2. Ground the IPA 287a. A ground jack is provided on the side of the instrument case.

3. Access the main menu. The display should show 0% values for Automatic and

Manual memory usage.

If a message prompts you to ClrData (clear data),

a) Scroll to ‘Y’ with either the or button.

b) Accept this by pressing ‘ENTER’.

4. Run an automatic test sequence —

a) Press ‘AUTO’.

b) Let the test run its course. This is ‘Test 1’.

i) Six decay tests are run. These are in the order +++ or +++

depending on the current autosequence setup.

ii) A balance test is run. The duration of the balance test may be any value

between 10 and 90 seconds or it may be turned off in the SETUP menu.

iii) The test results are displayed at the end of the test. The results are

displayed in three windows which may be scrolled with either the or 

button. The first window shows the positive and negative decay times

(from 1000 volts to 100 volts) for tests number 1 and 2 in the sequence.

The second window shows decay times for test number 3 and the

average times for three + and three –decay tests. The third window

shows the + and –balance peak voltages and the temperature and

humidity taken during the test sequence.

c) Press ‘ENTER’ to return to the main menu.

d) Repeat a, b and c to gather a second set of data. This will be ‘Test 2’.

5. Run manual decay tests —

a) Press and release ‘+ CHARGE’ and let the first manual decay test run its

course and display a result. That manual decay test will be labeled ‘M1+’. To

return to the main menu, press ‘ENTER’.

b) Press and release ‘+CHARGE’ again and run the test to completion. This

second manual decay test will be labeled ‘M2+’. To abort one of these tests at

any time during the test press the button that got the test started.

c) Return to the main menu. Press and release ‘CHARGE’. This third manual

decay test will be labeled ‘M3’ when completed. Return to the main menu.

6. Run manual balance tests —

a) Press and hold either the or button until Balance test is indicated on the

display then release. This will start your fourth manual test. It will be labeled

‘M4B’ when finished. Return to the main menu.

b) Repeat for a fifth manual test. This test will be labeled ‘M5B’. Note that if you

hold the button down too long to start the test, the test will be nullified.

Following test ‘M5B’, return to the main menu. The memory usage will be

displayed as ‘A20%M50%’. You have conducted 2 out of 10 automatic

sequences and 5 out of 10 manual tests.

7. At this point, you may elect to shut the equipment down and retire to a different

location to contemplate the results.

Test results —

Press and release the ‘ON-OFF’ button. You will be prompted for a Y/N? response to the

ClrData (clear data) question. NO!! Press ‘ENTER’ to accept “N”. That will take you to the

main menu while retaining the data.

To display the data, press and hold the ‘SETUP’ button (same button as ‘ON-OFF’) until the

display goes past ‘Off’ and shows the word ‘Set-up’, then release. If you hold the button too

long the action will be nullified.

To review the data, press ‘ENTER’ to accept and use the or keys to scroll. Press

‘ENTER’ when you are done to return to the main menu.

The Set-up Menu —

The Set-up menu allows the user to modify several functions of the IPA 287a. You have

already accessed the Set-up menu above to review your data. To enter the Set-up menu

from the main menu, press and hold the ‘SETUP’ button until the display goes past ‘Off’ to

‘Set-up’. To scroll the items, use the or keys. The key scrolls down from the top of

the logical list. To EXIT the Setup menu at any time, press ‘ON’. Items are as follows:

1. RvwData —Review Data. ‘Enter’ to review data or scroll to next item.

2. ClrData —Clear Data. ‘Enter’ prompts Y/N? Use or key to select, ‘ENTER’ to

execute.

3. Auto Seq —Auto Sequence. ‘Enter’ presents options. or key selects option.

‘ENTER’ accepts choice. Default is +++.

4. Tst dly —Test delay. Delay between automatic decay tests. Range is 0 to 30 seconds.

Default is 5 seconds.

5. Bal (Y/N) —Balance test included in automatic sequence? Default is “Y”

6. Bal dur —Balance test duration. Over what period of time to you wish to test ionizer

balance if the balance test is enabled. Range is 10 to 90 seconds. Default is 60

seconds.

7. AutoShtDwn —Auto Shut Down. Time before automatic instrument shutdown on lack

of activity. Battery saver. Range is 1 to 15 minutes. Disable by setting to ‘0min’. Default

is 1 minute.

8. Fac. Deflt —Reset factory defaults. ‘ENTER’ prompts “Y/N?” response. Resetting

defaults does not disturb accumulated data.

9. Exit

Section 4

MAINTENANCE

Precautions —

User maintenance should be limited to keeping the instrument clean and free from physical

damage. Store the instrument in its protective carrying pouch when not in use. Do not allow

any object to come in contact with the white insulators under the measurement plate. Do

not wrap cords around these insulators.

Cleaning —

If self-discharge becomes excessive (out of spec.), clean the insulators with a clean swab

and a 70%/30% mix of clean technical grade isopropyl alcohol and de-ionized water.

Fingerprints and other contaminants may be removed from the case with a clean lint-free

cloth dampened in the same solution. DO NOT use soap or detergent.

Battery —

Need for battery replacement is indicated by a warning message whenever the battery

voltage persistently dips below 7.5 volts. A fresh battery should be installed when this

occurs. The battery should be removed if the unit is to be stored for an extended period of

time. Removal of the battery when the unit is off does not disturb settings or data.

Calibration —

Calibration is not a user function and is beyond the scope of this manual. Calibration

information is available from the factory. Monroe Electronics recommends annual

calibration and/or when the instrument is damaged or repaired or where called for more

often by contract. We offer repair and calibration services for a fee.

Section 5

GLOSSARY



Blank voltage (Main Menu Startup screen)

or 

Polarity indicator (positive or negative voltage)

or 

Scroll up or down list

Refers to Automatic test

Adjust

Displays while plate voltage is being adjusted to 1050 volts

Auto Seq

See The Set-up Menu (Page 6)

AutoShtDwn

See The Set-up Menu (Page 6)

Bal

See The Set-up Menu (Page 6)

Bal dur

See The Set-up Menu (Page 6)

Celsius temperature

Chrg

Indicates that the plate is being charged

ClrData

See The Set-up Menu (Page 6)

Decay

Indicates that the plate voltage is decaying

Delay

Pause between auto tests

Enter

When displayed, press ENTER to view or modify the present option

Decay Failed

Voltage did not decay to 100V within 200sec; or discharge failed to

reach +1000V

Exit

See The Set-up Menu (Page 6)

Fac. Deflt

See The Set-up Menu (Page 6)

Refers to Manual test

MDA

Average times for Manual Decay tests

MemUsed

Shows percentage of Automatic and Manual memory currently in

use

Min

Minutes (see AutoShtDwn and The Set-up Menu (Page 6)

Min voltage in balance tests

Max voltage in balance tests

MnB

Balance results for Manual test n where n is test number

Mn+ or Mn

Decay time for Manual test n where n is test number (1-0)

MnTH

Temperature and Humidity data for Manual decay test n

NAD

Average Decay times for automatic sequence N

NBa

Balance results for automatic sequence N

NnD+ or NnD

Decay times for automatic test number n (1-3) in test sequence N (1-

NTH

Temperature and Humidity for automatic sequence N

Null

Results from holding any primary key too long —reverts to main

display

Off

If ON/OFF key is released while Off is displayed, the unit will be shut

off

ON=EXIT

Press ‘ON’ key to exit Set-up menu

Relative Humidity in percent

RvwData

See The Set-up Menu (Page 6)

Sec or s

Time in seconds

Set-Up

Release key to enter Set-Up mode

Tst dly

See The Set-up Menu (Page 6)

Volts

Ver

Firmware version

Zero

Indicates that the instrument is being autozeroed

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