EMIT 19270 Comparator for Personnel Testers Instruction Manual

EMIT 19270 Comparator for Personnel Testers

Operation Instructions

Description

Frequency of re-calibration should be based on the critical nature of those ESD sensitive items handled and the risk of failure for the ESD protective equipment and materials. In general, EMIT recommends that calibration be performed annually.

Use the EMIT 50426 Limit Comparator to perform periodic verification (once every 6-12 months) of the Desco Combo Tester X3 and EMIT SmartLog Pro®. The Limit Comparator can be used to check the test limits of these testers without removing them from the factory floor.

The EMIT 50426 Limit Comparator is compatible with the following items:

Packaging

1. Limit Comparator
2. Test Leads with Banana Plug Terminals, 5′ Length

Tester Configuration

Combo Tester X3

The resistance limits for footwear and wrist strap tests are controlled by the DIP switches located on the sides of the tester. Use the following tables for the DIP switch settings and their corresponding test values.

Footwear Resistance

DIP switches 1 and 2 control the HIGH test limit.

DIP switches 3 and 4 control the LOW test limit.

default setting

Wrist Strap Resistance
DIP switches 5 and 6 control the HIGH test limit.

default setting

DIP switch 5 must be ON (default setting) for the wrist strap test to be active. The wrist strap test will be disabled if DIP switch 5 is set to OFF.

The LOW limit for the wrist strap test is set to 750 Kilohms and cannot be modified by the user.

SmartLog Pro® 2

1. Access the Admin Menu by entering an administrator ID number on the keypad. The default administrator ID number is 0.

2. Tap the ESD button.

3. The selected Wrist Strap and Footwear Limits can be found and adjusted at the bottom of the page. Tap the Save button when complete.

Operation

Combo Tester X3

Testing the Wrist Strap Circuit

1. Verify that the tester is connected to equipment ground.
2. Plug the two included test leads into each yellow banana jack located at the top of the Limit Comparator.
3. Connect one of the test leads from the Limit Comparator to the SINGLE-WIRE jack located on the face of the tester. Connect the other lead from the Limit Comparator to the ground jack located on the bottom of the tester.
4. Select 750K LOW with the Limit Comparator’s rotary switch.
5. Touch and hold the test switch on the tester until the results are displayed. The tester should indicate a wrist strap FAIL LOW condition.
6. Select 750K PASS on the Limit Comparator and repeat the test. The tester should indicate a wrist strap PASS condition.
7. Select either the 10M PASS or 35M PASS setting, whichever one is appropriate, on the Limit Comparator and repeat the test. The tester should indicate a wrist strap PASS condition.
8. Select either the 10M HIGH or 35M HIGH setting, whichever one is appropriate, on the Limit Comparator and repeat the test. The tester should indicate a wrist strap FAIL HIGH condition.

Testing the Footwear Circuit

1. Insert the Limit Comparator’s stereo plug into the jack labeled FOOT PLATE on the bottom of the tester.
2. Select the appropriate FAIL LOW setting on the Limit Comparator.
3. Touch and hold the test switch on the tester until the results are displayed. The tester should indicate a FAIL LOW condition for both feet.
4. Select the appropriate PASS LOW setting on the Limit Comparator and repeat the test. The tester should indicate a PASS condition for both feet.
5. Select the appropriate PASS HIGH setting on the Limit Comparator and repeat the test. The tester should indicate a PASS condition for both feet.
6. Select the appropriate FAIL HIGH setting on the Limit Comparator and repeat the test. The tester should indicate a FAIL HIGH condition for both feet.

Calibrating the 1 Gigohm Footwear Limit

Combo Tester X3 units with serial numbers ending in 2326001 or greater include firmware that allows field calibration of the 1 gigohm footwear test limit when needed. Environmental conditions such as humidity and temperature may affect the test accuracy of the 1 gigohm limit. Should the Combo Tester X3 fail verification testing of the 1 gigohm test limit, use the following procedure to re-calibrate its parameters.

NOTE: Two 5-pound electrodes are required to complete this procedure. The electrodes provide a method for loading the resistance from the Limit Comparator onto each of the dual foot plate’s plates. One pair of 5-pound electrodes are available as Desco item 50003.

1. Verify that the Combo Tester X3 is connected to power, equipment ground, and its dual foot plate.

2. Configure the DIP switch on the Combo Tester X3 as shown below.

3. Place one 5-pound electrode onto each plate on the dual foot plate.

4. Connect each electrode to the yellow banana jacks located at the top of the Limit Comparator using the two test leads.

5. Select 1G CAL with the Limit Comparator’s rotary switch.
   Touch and hold the test switch on the tester until all six footwear LEDs rapdily blink and then remain illuminated. This confirms successful calibration of the 1 gigohm footwear test limit.
   NOTE: An unsuccessful calibration is indicated if the six footwear LEDs do not rapidly blink. Verify the setup and confirm that all wires are properly connected.

6. Reconfigure DIP switches 3-6 back to the desired footwear low and wrist strap high test limit settings.

7. Select 1G PASS with the Limit Comparator’s rotary switch.

8. Touch and hold the test switch on the tester until the results are displayed. The tester should indicate a PASS condition for both feet.

9. Select 1G HIGH with the Limit Comparator’s rotary switch.

10. Touch and hold the test switch on the tester until the results are displayed. The tester should indicate a FAIL HIGH condition for both feet.

SmartLog Pro® 2

Testing the Wrist Strap Circuit

1. Verify that the tester is connected to equipment ground.
2. Plug the two included test leads into each yellow banana jack located at the top of the Limit Comparator.
3. Connect one of the test leads from the Limit Comparator to the SINGLE WIRE jack located on the face of the tester. Connect the other lead from the Limit Comparator to equipment ground.
4. Select 750K LOW with the Limit Comparator’s rotary switch.
5. Touch and hold the test switch on the tester until the results are displayed. The tester should indicate a wrist strap FAIL condition.
6. Select 750K PASS on the Limit Comparator and repeat the test. The tester should indicate a wrist strap PASS condition.
7. Select either the 10M PASS or 35M PASS setting, whichever one is appropriate, on the Limit Comparator and repeat the test. The tester should indicate a wrist strap PASS condition.
8. Select either the 10M HIGH or 35M HIGH setting, whichever one is appropriate, on the Limit Comparator and repeat the test. The tester should indicate a wrist strap FAIL condition.

50784 5-Pound Electrode

Pair the Limit Comparator with the EMIT 50784 5-Pound Electrode to verify the calibration of the footwear circuit in the SmartLog Pro®. The electrode provides a method for loading the resistance from the Limit Comparator onto each of the dual foot plate’s plates.

Testing the Footwear Circuit

1. Plug the two test leads into each yellow banana jack located at the top of the Limit Comparator.
2. Connect one of the test leads from the Limit Comparator to the 5-pound electrode. Connect the other lead from the Limit Comparator to equipment ground. Use the included alligator clip if desired. Leave the Limit Comparator’s stereo plug disconnected from the tester.
3. Place the 5-pound electrode on top of the left foot plate.
4. Select the appropriate FAIL LOW setting on the Limit Comparator.
5. Touch and hold the test switch on the tester until the results are displayed. The tester should indicate a FAIL condition for the left foot.
6. Select the appropriate PASS LOW setting on the Limit Comparator and perform a test. The tester should indicate a PASS condition for the left foot.
7. Select the appropriate PASS HIGH setting on the Limit Comparator and perform a test. The tester should indicate a PASS condition for the left foot.
8. Select the appropriate FAIL HIGH setting on the Limit Comparator and perform a test. The tester should indicate a FAIL condition for the left foot.
9. Place the 5-pound electrode on top of the right foot plate.
10. Perform the same FAIL LOW, PASS LOW, PASS HIGH and FAIL HIGH tests and verify the results for the right foot.

Specifications

Setting| Nominal Resistance|

Nominal Resistance Tolerance

---|---|---
100K LOW| 90 kΩ| ±2%
100K PASS| 110 kΩ| ±2%
750K LOW| 675 kΩ| ±2%
750K PASS| 825 kΩ| ±2%
1M LOW| 909 kΩ| ±2%
1M PASS| 1.10 MΩ| ±2%
10M PASS| 9.09 MΩ| ±5%
10M HIGH| 11.09 MΩ| ±5%
35M PASS| 31.09 MΩ| ±5%
35M HIGH| 37.89 MΩ| ±5%
100M PASS| 90.9 MΩ| ±5%
100M HIGH| 112.9 MΩ| ±5%
1G PASS| 812.9 MΩ| ±10%
1G HIGH| 1.213 GΩ| ±10%
1G CAL| 1.0 GΩ| ±5%

These resistance values may be verified using a digital ohmmeter. Connect the ohmmeter’s test leads into each of the Limit Comparator’s yellow banana jacks. If any value is out of specification, the Limit Comparator must be returned to the manufacturer for repair.

km) Maximum relative humidity of 80% up to 85°F (30°C) decreasing linearly to 50% @ 85°F (30°C)
Dimensions| 3.8″ L x 2.4″ W x 0.9″ H (97 mm x 61 mm x 23 mm)
Weight| 0.2 lbs (0.1 kg)
Country of Origin| United States of America

The EMIT 50426 Limit Comparator may also be used with the following discontinued items:

Combo Tester X3 19278, 19279, 99031, 99032, 99033, 99034, 222566, 222567, 222568, 222569
SmartLog Pro® SE 50170, 50173, 50174

Limited Warranty, Warranty Exclusions, Limit of Liability and RMA Request Instructions See the EMIT Warranty – DescoEMIT.com/Warranty.aspx

Customers Support

EMIT – 3651 Walnut Avenue, Chino, CA 91710
909-664-9980
Website: DescoEMIT.com

References

• EMIT - Smart ESD Process Control
• EMIT - Warranty
• EMIT - Smart ESD Process Control
• EMIT - Smart ESD Process Control

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