Desco 19259 Installation Manual

TECHNICAL BULLETIN TB-3045

Limit Comparator - Instructions for Use

PACKAGING

1 Limit Comparator
2 Test Leads, Banana to Banana

1 NIST Certicate of Calibration

OPERATION

Testing Footwear Circuit, refer to gure 3.

To complete the footwear test, you will need to test the
low and high limits. Refer to the dipswitch setting on the
left side of the testers for footwear test ranges.
Manufacturer’s suggested default test range is 750K
low and 35Meg high for the US and Europe.

Made in America

Item 19259 Limit Comparator for Testers

DESCRIPTION

Banana Jacks - For
Testing Wrist Strap

Circuit

Test Limit Knob ­Adjustment for Test

Stereo Jack - For
Testing Footwear

Circuit

Do not power down tester, remove stereo cable from
bottom right jack of tester labeled “FOOTPLATE” and
connect the stereo lead from model 19259 to the jack
labeled “FOOTPLATE”.

Testing Low Circuit – If the tester’s low range is set to

750K. Set the knob on model 19259 to the “750K LOW”

position. Touch the TEST contact on the tester and you
should get a red LED for the left
and right foot.
Disregard the test result for the wrist strap, if the wrist
strap circuit is on.

Banana to banana Test Lead - For
Testing Single Wire Wrist Strap Circuit

Figure 3. Footwear Test Setup

Set the knob on model 19259 to “750K Pass”, touch the

TEST contact on the tester and you should get a green
LED for the left and right of the foot.

Figure 2. Limit Comparator features and components

DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]

DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Website: Desco.com

DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Website: Desco.com

TB-3035 Page 1 of 3 Revision May 2009

TB-3045 February 2010 Page 1 of 3

© 2009 DESCO INDUSTRIES INC.
Employee Owned

DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]

© 2010 DESCO INDUSTRIES INC.

Employee Owned

Testing High Circuit – If the tester’s high range is

35Meg. Set the knob on model 19259 to “35M PASS”,

touch the TEST contact on the tester and you should
get a green LED for the left and right feet. Set the

knob on model 19259 to “35M HIGH”, touch the TEST

contact on the tester and you should get a yellow LED

for both the left and right feet. If the limit is set to 1Gig
on the tester, test at 1Gig on model 19259, same for

10Meg and 100Meg. Disregard the test result for the
wrist strap, if the wrist strap circuit is on.

Testing High Circuit – If the tester’s high range is

10Meg. Set the knob on model 19259 to “10M PASS,”

touch the TEST contact on the tester and you should

get a green LED for the wrist strap. Set the knob on

model 19259 to “10M HIGH”, touch the TEST contact
on the tester and you should get a yellow LED for the
wrist strap. If the limit is set to 35Meg on the tester, test
at 35Meg on model 19259. Disregard the test result for
the footwear.

Footwear Low Fail

Figure 3a. Footwear status LEDs

Footwear Low and

High Pass

Footwear High Fail

Testing Wrist Strap Circuit, refer to gure 2

Figure 4. Wrist Strap Test Setup

To complete the wrist strap test, you will need to test
the low and high limits. Refer to the dipswitch setting
on the left side of the testers for wrist strap test ranges.
Manufacturer’s suggested default test range is 750K
low and 10Meg high for the US and 750K to 35Meg for
Europe.

Do not power down the tester. Using the 2 banana

leads included with model 19259. Attach 1 of the

banana leads to the right side banana jack on model

19259 and connect the other end to the ground

symbol jack on the tester. Connect the last banana jack
to the left banana jack of model 19259 and the other
end to the “SINGLE – WIRE” banana jack. Note be sure
FOOTPLATE lead is removed.

Testing Low Circuit - If the tester’s low range is set to

750K. Set the knob on model 19259 to the “750K LOW”

position. Touch the TEST contact down on the tester

and you should get a red LED for the Wrist strap.
Disregard the test result for the footwear. Set the knob

on model 19259 to “750K Pass”, touch the TEST
contact on the tester and you should get a green LED
for the wrist strap.

Wrist Strap Low Fail Wrist Strap Low and

High Pass

Wrist Strap High Fail

Figure 4a. Wrist Strap status LEDs

SPECIFICATIONS AND DIMENSIONS

Weight: 0.197 Ib

Charge Detection

Dimensions: 3.76 x 2.41 x 1.52 in

9.55 x 6.12 x 4.52 cm

When the operator is connected to the remote and

accumulates a voltage greater than ± 1.25 volts, the

CHARGE LED (red) will display in its respective OP-

3.76”

9.55cm

ERATOR section (for charge detection data out, see
the Data Output section on Page 8). To disable charge
detection on the display, shunt jumper JP6 inside the
unit (See Page 7). If a charge is detected while using

1.52”

3.86cm

this conguration, the display will remain in its previous

state until the charge is no longer detected.

0.93”

2.36cm

2.41”

6.12cm

Figure 5. Limit Comparator specications and

dimensions

Testers limit comparator will calibrate:

19276 - Combo X3 Tester, Data Output, w/ Dual Plate
19277 - Combo X3 Tester, Data Output, Programmable,

w/ Stand

CALIBRATION

There are no user adjustments on model 19259. Each
value is a xed resistor load, any model 19259 that falls
out of specication will need to be sent to factory for
repair. Using a DVM (digital voltmeter), set the meter
to read ohms. The limit that the knob is set on can be
measured using the DVM connected between Banana
1 to Banana 2 and connected between Conductor 1
and Conductor 2. Refer to gure 3.

DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]

DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Website: Desco.com

DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Website: Desco.com

TB-3035 Page 2 of 3 Revision May 2009

TB-3045 Page 2 of 3

© 2009 DESCO INDUSTRIES INC.
Employee Owned

DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]

© 2010 DESCO INDUSTRIES INC.

Employee Owned