Prostat PDT-740B, User Manual

NOTe

Before using this, or any other electronic piece of equipment, 

carefully read the instruction manual completely.

i.  introduction

The PDT-740B Static Decay Timer is typical of Prostat’s innovative technology and support of Professional 

ESD Control Managers and Auditors. This unique accessory is designed to measure the decay time of 

ionizers from ±1,000 volts to less than 100 volts in accordance with ESD Association’s Ionization Standard 

ANSI/ESD STM3.1, and measure material decay time to less than 50 volts and less than 10 volts. Properly 

used, the PDT-740B provides decay time measurements for evaluating ionizers, packaging materials, foot

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wear, personnel grounding, production aids, some equipment and many other ESD control products.

The PDT-740B Static Decay Timer is used with Prostat’s precision portable Charge Plate Monitor kit com

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ponents, including the PFM-711A Field Meter, CPM-720A Charge Plate Assembly and PCS-730 ±1kV Charg

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ing Source. For evaluating materials and other products, additional decay measurement accessories e.g., 

PGB-745 Decay Electrode, or PRF-911 Concentric Ring fixtures are recommended.

ii.  before using the PdT-740b Static decay Timer

A.  Examine the instrument for damage, contamination (excessive dirt, grease, etc..) and defects. If 

any abnormal conditions exist, do not attempt to make any measurements.

B. 

Basic contents of the PDT-740B package include:

1. 

PDT-740B Instrument 

2. 

One 9 volt battery

3.  40 inch (tip to tip) analog cable equipped with two (2) mini-phono jacks.

4. 

Certificate of Calibration

5. 

Available options include:

a. 

Prostat PGB-745 Static Decay Electrodes

b.  PRF-911 Concentric Ring Fixture and PTB-920 Dual Test Bed

c. 

PTB-915 3x5.5 inch insulated test bed and 3x6 inch stainless steel test bed

iii.  Safety

The following safety information must be observed to insure maximum personal safety during the opera

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tion of this meter.

A.  DO NOT use the instrument if it appears damaged, or if you suspect it is not operating properly.

B. 

Measuring voltages which exceed the limits of this instrument, i.e., greater than 1,500 electrostatic 

volts, may damage it and expose the operator to a shock hazard. 

Always observe instrument volt-

age limits as stated.

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Rev. B  / February 2005

PDT-740B Static Decay Timer