Prostat PDT-740B Manuel utilisateur
User Manual
pdt-740b
static decay timer
Page
I. Introducon 4
II. Before using the PDT-740B 4
III. Safety 4
IV. Funcon 5
V Measurement Response Time 5
VI. Baery Installaon & Maintenance 5
VII. Connecng the PDT-740B to PFM-711A Fieldmeter 6
VIII. Normal Operaon for Ionizaon Stac Decay Measurements 7
IX. Suggeson “A” for Material Stac Decay Measurements 9
General Specicaons 13
© 2011 by Prostat® Corporaon. All rights reserved. Printed in the United States of America. No part of this manual may
be used or reproduced in any manner whatsoever without wrien permission. For informaon contact
Prostat Corporaon, 1072 Tower Lane, Bensenville, IL 60106 USA
Prostat is the registered trademark of Prostat® Corporaon
Before using this, or any other electronic piece of equipment,
carefully read the instrucon manual completely.
The PDT-740B Stac Decay Timer is typical of Prostat’s innovave technology and support of Professional
ESD Control Managers and Auditors. This unique accessory is designed to measure the decay me of
ionizers from ±1,000 volts to less than 100 volts in accordance with ESD Associaon’s Ionizaon Standard
ANSI/ESD STM3.1, and measure material decay me to less than 50 volts and less than 10 volts. Properly
used, the PDT-740B provides decay me measurements for evaluang ionizers, packaging materials, foot-
wear, personnel grounding, producon aids, some equipment and many other ESD control products.
The PDT-740B Stac Decay Timer is used with Prostat’s precision portable Charge Plate Monitor kit com-
ponents, including the PFM-711A Field Meter, CPM-720A Charge Plate Assembly and PCS-730 ±1kV Charg-
ing Source. For evaluang materials and other products, addional decay measurement accessories e.g.,
PGB-745 Decay Electrode, or PRF-911 Concentric Ring xtures are recommended.
A. Examine the instrument for damage, contaminaon (excessive dirt, grease, etc..) and defects. If
any abnormal condions exist, do not aempt to make any measurements.
B. Basic contents of the PDT-740B package include:
1. PDT-740B Instrument
2. One 9 volt baery
3. 40 inch (p to p) analog cable equipped with two (2) mini-phono jacks.
4. Cercate of Calibraon
5. Available opons include:
a. Prostat PGB-745 Stac 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
The following safety informaon must be observed to insure maximum personal safety during the opera-
on of this meter.
A. DO NOT use the instrument if it appears damaged, or if you suspect it is not operang properly.
B. Measuring voltages which exceed the limits of this instrument, i.e., greater than 1,500 electrostac
volts, may damage it and expose the operator to a shock hazard.
4Rev. B / February 2005
PDT-740B Stac Decay Timer
C. As with other electronic devices, do not use or operate in wet condions or in hazardous combus-
ble environments.
The PDT-740B is designed specically to measure decay me of ionizers and materials in seconds and
tenths of a second from 1,000 to 100, 50 or 10 volts. It is used with the Prostat PFM-711A Field Meter
and CPM-720 Charge Plate Monitor Assembly, or an equivalent instrument having an analog output of 1
volt equaling 10,000 electrostac volts. This easy to use instrument comes equipped with LCD display, an
analog input for connecon to the eld meter, ON/OFF Power Switch and a VOLTAGE CUT-OFF SELECTOR
(10, 50 or 100 volts) switch.
The PDT-740B response is 0.2 seconds at 100 volt CUT-OFF and 0.3 seconds at 50 and 10 volt CUT-OFF.
A. Baery Replacement
1. Power is supplied by a 9 volt “transistor” baery that will provide greater than 40 hours of
operaon without replacement.
2. Replace the baery periodically or when the indicator will not reset in normal
operaons.
Dead baery voltage is approximately 7.2 to 7.5 volts.
3. Unit should be OFF when replacing baery.
4. To replace the baery:
a. Remove the cover from the back of the instrument.
b. Remove the baery from the case.
c. Connect a new baery to terminals and insert it into the baery compartment.
d. Replace the baery cover by sliding it carefully in the grooves provided. Do not over force
the cover on.
5
Rev. B / February 2005
PDT-740B Stac Decay Timer
If the cover does not re-install easily, remove the baery and reinsert for a beer t. Be
sure wires do not hamper closing the baery cover.
e. The PDT-740B is now ready for use.
B. Storage & Cleaning
1. The unit should be stored in clean, dirt free condions at normal room temperature and hu-
midity. The ideal storage environment is within a Prostat designed case or kit.
2. Simply maintain the outer surface and display by wiping with a non-abrasive low linng cloth.
GREEN LED
READY LIGHT
ANALOG INPUT
JACK
CUT-OFF VOLTAGE
SELECTOR SWITCH
ON/OFF SWITCH
RED LED TIMING
IN PROGRESS
A. Mount the CPM-720 Charge Plate Assembly onto the PFM-711A in accordance with their manual
instrucons.
B. With both instruments’ power switch OFF, connect the analog cable between the PFM-711A Field
Meter and PDT-740B Stac Decay Timer:
1. Insert one cable mini-phono plug into the PFM-711A Analog Output receptacle located on the
le front panel of the instrument.
2. Insert the opposite end of the cable into the PDT-740B Analog Input receptacle located on the
le front panel of the instrument.
6Rev. B / February 2005
PDT-740B Stac Decay Timer
C. Slide the PFM-711A power switch to to energize the eld meter
D. Slide the PDT-740B ON/OFF switch to ON.
E. The system is ready for use
Overview:
The dual phono plug cable assembly is connected to the analog output of the PFM-711A Field Meter and
the Analog Input of the PDT-740B Decay Timer. With the Charge Plate Assembly (CPM) installed on the
Field Meter, the Charging Source is used to apply greater than ±1,000 volts to the CPM. To measure an
ionizers decay me performance, proceed as follows:
A. While wearing a properly grounded wrist strap, grasp the PFM-711A/CPM-720 assembly in one
hand making sure your hand contacts the grounding snap on the back of the PFM-711A Field Me-
ter.
1. Place the PFM-711A Field Meter power switch in the posion and the instru-
ment.
2. Note: Your hand should not make contact with, nor obstruct the CPM-720 Charge Plate Assem-
bly in any way.
7
Rev. B / February 2005
PDT-740B Stac Decay Timer
B. Turn ON PDT-740B Timer and select 100 Cut O Voltage
1. With Charging Source properly grounded and held in your other hand, charge the CPM-720
Plate using the PCS-730 ±1KV Charging Source to > ±1,000 volts. When voltage exceeds ±1,000
volts, the PDT-740B Stac Decay Timer automacally:
2. Resets its display to ZERO (00.0)
3. Turns ON its Green LED, which provides Decay Cycle
Ready indicaon.
C. Assuming you are auding a desk top blower, posion
the CPM-720 Charge Plate in the ionizers air ow approxi-
mately 12 inches from air output grid
D. As the ionizer neutralizes CPM voltage, the eld meter
voltage will drop below ±1,000 volts, at which me:
1. The Green LED Decay Cycle Ready automacally goes OFF
2. The PDT-740B LCD display begins ming funcon in seconds
3. The PDT-740B Red LED Timing in Progress automacally comes ON and stays ON unl voltage
decays to 100 (±2) volts
4. When CPM plate voltage reaches 100 volts or less, the mer stops and the Red Timing in Prog-
ress LED goes OFF.
8Rev. B / February 2005
PDT-740B Stac Decay Timer
E. Repeat the above procedure for addional measurements.
Overview:
The dual phono plug (input) cable assembly is connected to the analog output of the PFM-711A Field Me-
ter and the Analog Input of the PDT-740B Decay Timer. The Charge Plate Assembly (CPM-720) is installed
on the Field Meter. One end of a high resistance lead is connected to the CPM-720 Plate and the other
end connected to a Prostat PGB-745 Electrode. The PCS-730 Charging Source is used to apply greater
than ±1,000 volts to the CPM, which is shared with the PGB-745 Electrode. To measure material’s decay
me performance, refer to the gures below and proceed as described.
9
Rev. B / February 2005
PDT-740B Stac Decay Timer
A. Setup PFM-711A Field Meter, PCS-720 Charge Plate and PDT-740B Stac Decay Timer as described
and illustrated above.
B. Place the material to be tested on a grounded steel test bed.
C. Connect the PGB-745 Stac Decay Electrode to the CPM-720 Charge Plate using a high resistance
lead, and suspend the electrode above the specimen to be tested.
D. While wearing a properly grounded wrist strap and the PFM-711A/CPM-720 is connected to
ground:
1. Place the PFM-711A Field Meter power switch in the posion and the instru-
ment.
2. Note that the PFM-711A Field Meter and CPM-720 Charge Plate Assembly may lay on a
grounded conducve worksurface or be aached to ground through the PFM-711A ground
snap. Nothing should be in contact with the upper CPM-720 plate except the high resistance
lead.
E. Turn ON PDT-740B Timer and select Cut O Voltage
F. With Charging Source properly grounded, charge the CPM-720 Plate using the PCS-730 ±1KV
Charging Source to > ±1,000 volts. This also charges the PGB-745 Electrode to the same voltage.
When voltage exceeds ±1,000 volts, the PDT-740B Stac Decay Timer automacally:
1. Resets its display to (00.0)
2. Turns ON its Green LED, which provides Decay Cycle Ready indicaon.
10 Rev. B / February 2005
PDT-740B Stac Decay Timer
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