DESCO WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST
- One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website:
TB-3019
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© 2019 DESCO INDUSTRIES INC
Employee Owned
Operator Test Voltage
+5V
SW1 Position: RIGHT
SW2 Position: LEFT
+8V
SW1 Position: LEFT
SW2 Position: RIGHT
Operator High Test Limit
10 megohms
SW3 Position: RIGHT
35 megohms
SW3 Position: LEFT
Calibration
The Dual-Wire Dual Operator Monitor is calibrated to
standards traceable to NIST. Frequency of recalibratrion
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, we
recommend that calibration be performed annually.
Use the EMIT
Limit Comparator for Dual-Wire
Monitors to perform periodic testing (once every 6-12
months) of the Dual-Wire Dual Operator Monitor. The
Limit Comparator can be used on the shop floor within a
few minutes virtually eliminating downtime, verifying that
the monitor is operating within tolerances.
See
Figure 5. EMIT 50524 Limit Comparator for Dual-Wire
Monitors
Specifications
Input Voltage and
Frequency
(External Adapter)
AC/DC Power Adapter
Power Input:
100-240 VAC, 50/60 Hz
Power Output:
12 VDC @ 0.50 A
Cable Length:
5 ft. (1.5 m)
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
(Monitor)
4.4" x 4.7" x 2.1"
(112 mm x 119 mm x 53 mm)
Weight
(Monitor)
1.1 lbs. (0.5 kg)
Operator Test Range
1.91 megohms to 35
megohms (default)
or
1.91 megohms to 10
megohms (±10 %)
Worksurface Test
Limit*
3.5 megohms (±10 %)
Operator Test Voltage 8 V (default) or 5 V
Worksurface Test
Voltage
200 mV
Country of Origin
United States of America
*
The worksurface mat must have a conductive
layer such as Dual Layer Rubber or Dissipative
3-Layer Vinyl with conductive buried layers. Desco
workstation monitors are not recommended for use with
homogeneous matting.
ANSI/ESD S20.20 requires the use of a surface
resistance meter for periodic verification of a
worksurface’s resistance-to-ground (Rtg). Constant
monitors may not be used as a substitute for this
requirement.
