PDT-740B
Static Decay TimerMeasure decay times for
ionizers and materials
The PDT-740B Static Decay Timer is designed to
measure the time required for a 1,000 volt charge to dissipate
to less than 100, 50 or 10 volts in tenths of a second. This
extremely useful accessory is used with the PROSTAT PFM-711A
Field Meter and CPM-720A Charge Plate Monitor to evaluate Ionizer
Decay Time in accordance with ESD Association Ionization Standard
S3.1. The PDT-740B may be used to evaluate the static decay
capabilities of materials, personnel, equipment and other products.
It is compatible with most portable CPM's and field meters
having an analog output (10,000 volts equals 1 volt). Completely
automatic, the PDT-740B is simple to operate and easy to use.
SPECIFICATIONS:
Controls:
OFF-ON Cut Off Voltage, 10, 50 and 100 Volts (Selects Voltage
to stop timing)
Indicators
Green LED:
Decay Cycle Ready > ± 1kV, CPM voltage > ± 1,000
volts
Red LED:
Timing in Progress, CPM voltage decay timing activated LOBAT
displayed when battery voltage <6.0 volts
Display:
Liquid Crystal Display (LCD) displays elapsed decay time from ± 1,000
volts to selected Cut Off voltage in seconds and tenths of a
second (00.0)
Polarity:
Automatically senses Positive & Negative voltage references
Zero & Reset:
Automatically Resets Timer and Display to 00.0 when CPM voltage > ± 1kV.
Reset indicated when Green LED Decay Cycle Ready LED is ON.
Response:
Approximately 200 milliseconds in combination with CPM and PFM-711A
Timing Range:
From 0.2 to 159.9 seconds
Timing Setpoints:
Reset when voltage input 100mv ± 2mv (1,000 Field Meter
Volts ± 20V)
Cut Off Voltage @ 100 V: 10mv ± 0.2mv (100 Field Meter
Volts ± 2V)
Cut Off Voltage @ 50 V: 5mv ± 0.2mv (50 Field Meter Volts ± 2V)
Cut Off Voltage @ 10 V: 1mv ± 0.2mv (10 Field Meter Volts ± 2V)
Accuracy:
Typically < ± 5%
Power:
One (1) standard 9-volt battery, PROCELL, Eveready #216 (NEDA
1604, JIS 006P, IEC 6F22)Eveready #216
Battery Life:
> 40 hours typical
Dimensions
Width: 2.75" (7 cm)
Depth: 1.0" (2.5 cm)
Length: 4.5" (11.4 cm)
Analog Cable
Length: 40" (102 cm)
Weight:
6.5 oz. (184 gm)
Technical Documents:
» PDT-740B
Data Sheet |