TB-9083
Page 3 of 3
© 2020 DESCO INDUSTRIES INC
Employee Owned
SCS
- 926 JR Industrial Drive, Sanford, NC 27332
East: (919) 718-0000 | West: (909) 627-9634 • Website:
724 Plus Workstation Monitor
Testing the Operator Circuits
The operator high test limit may be configured using
the Set switch located on the back of the 724 Plus
Workstation Monitor. The test limit may be set to either
10 megohms or 35 megohms. Take note of the test limit
setting before following the instructions listed below.
The Verification Tester’s ground clip toggle switch is
not used in the verification of the 724 Plus Workstation
Monitor. It may be set to any position.
1. Insert the Verification Tester’s stereo plug into the
monitor’s OPERATOR 1 jack.
2. Select “1.5M LOW” with the operator rotary switch.
The OPERATOR 1 LED should blink yellow, and the
audible alarm should sound.
3. Select “1.5M PASS” with the operator rotary switch.
The OPERATOR 1 LED should illuminate green,
and its audible alarm should not sound.
4. Select either “10M PASS” or “35M PASS”,
whichever one is appropriate, with the operator
rotary switch. The monitor’s OPERATOR 1 LED
should illuminate green, and its audible alarm
should not sound.
5. Select either “10M HIGH” or “35M HIGH”, whichever
one is appropriate, with the operator rotary switch.
The monitor’s OPERATOR 1 LED should illuminate
red, and its audible alarm should sound.
6. Repeat steps 1-5 for the OPERATOR 2 jack on the
operator remote.
Testing the Mat Circuit
Equipment Needed
• Resistance Decade Box
(1 megohm to 5 megohm range, ±1% tolerance)
• 2 Test Leads for the Resistance Decade Box
• 1 Alligator Clip
1. Connect the two test leads to the resistance decade
box.
2. Connect one of the test leads to equipment ground.
3. Disconnect the 724 Plus Workstation Monitor’s mat
monitor cord from its worksurface mat. The mat LED
should illuminate red, and the audible alarm should
sound.
4. Use an alligator clip to connect the second test lead
from the resistance decade box to the metal snap on
the mat monitor cord.
5. Set the resistance decade box to the values shown
in the following table. The 724 Plus Workstation
Monitor’s MAT LED and audible alarm should
behave as described in the table.
Load
Resistance
Mat LED Audible
Alarm
3.1 megohms
Green
Off
4.3 megohms
Red
On
Specifications
Operating Temperature 50 to 95°F (10 to 35°C)
Environmental
Requirements
Indoor use only at altitudes
less than 6500 ft. (2 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 .9" H
(97 mm x 61 mm x 23 mm)
Weight
0.2 lbs. (0.1 kg)
Country of Origin
United States of America
Operator Resistance Values:
Setting
Nominal
Resistance
% Tolerance of
Nominal Resistance
1.5M LOW
1.33 Megohms
±2%
1.5M PASS
1.69 Megohms
±2%
10M PASS
8.45 Megohms
±2%
10M HIGH
11.5 Megohms
±2%
35M PASS
29.4 Megohms
±2%
35M HIGH
40.2 Megohms
±2%
Ground Clip Resistance Values:
Setting
Nominal
Resistance
% Tolerance of
Nominal Resistance
SHORT
< 1 Ohm
±2%
10M PASS
4.99 Megohms
±2%
10M HIGH
11.5 Megohms
±2%
These resistance values may be verified using a digital
ohmmeter. Connect the ohmmeter’s test leads across
the Verification Tester’s stereo plug. If any value is out
of specification, the Verification Tester must be returned
to the manufacturer for repair.
Limited Warranty, Warranty Exclusions, Limit of
Liability and RMA Request Instructions
See the SCS Warranty -