Prostat PDT-740B Manuale utente

User Manual

PDT-740B

STATIC DECAY TIMER

PROSTAT® PDTͳ740B STATIC DECAY TIMER

SecƟon Topic Page

I. Introducon 4

II. Before using the PDT-740B 4

III. Safety 4

IV. Funcon 5

V Measurement Response Time 5

VI. Baery Installaon & Maintenance 5

VII. Connecng the PDT-740B to PFM-711A Fieldmeter 6

VIII. Normal Operaon for Ionizaon Stac Decay Measurements 7

IX. Suggeson “A” for Material Stac Decay Measurements 9

General Speciﬁcaons 13

Table of Contents

be used or reproduced in any manner whatsoever without wrien permission. For informaon contact

Prostat Corporaon, 1072 Tower Lane, Bensenville, IL 60106 USA

Prostat is the registered trademark of Prostat® Corporaon

NOTE

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

carefully read the instrucon manual completely.

I. IntroducƟon

The PDT-740B Stac Decay Timer is typical of Prostat’s innovave 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 Associaon’s Ionizaon 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 evaluang ionizers, packaging materials, foot-

wear, personnel grounding, producon aids, some equipment and many other ESD control products.

The PDT-740B Stac 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 evaluang materials and other products, addional decay measurement accessories e.g.,

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

II. Before using the PDT-740B StaƟc Decay Timer

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

any abnormal condions exist, do not aempt to make any measurements.

B. Basic contents of the PDT-740B package include:

1. PDT-740B Instrument

2. One 9 volt baery

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

4. Cerﬁcate of Calibraon

5. Available opons include:

a. PGB-745 Stac 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 informaon 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 operang properly.

B. Measuring voltages which exceed the limits of this instrument, i.e., greater than 1,500 electrostac

volts, may damage it and expose the operator to a shock hazard. Always observe instrument volt-

age limits as stated.

4Rev. B / February 2005

PDT-740B Stac Decay Timer

C. As with other electronic devices, do not use or operate in wet condions or in hazardous combus-

ble environments.

IV. FuncƟon

The PDT-740B is designed speciﬁcally 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 electrostac volts. This easy to use instrument comes equipped with LCD display, an

analog input for connecon to the ﬁeld meter, ON/OFF Power Switch and a VOLTAGE CUT-OFF SELECTOR

(10, 50 or 100 volts) switch.

V. Measurement Response Time

The PDT-740B response is 0.2 seconds at 100 volt CUT-OFF and 0.3 seconds at 50 and 10 volt CUT-OFF.

VI. BaƩery InstallaƟon & Maintenance

A. Baery Replacement

1. Power is supplied by a 9 volt “transistor” baery that will provide greater than 40 hours of

operaon without replacement.

2. Replace the baery periodically or when the GREEN RESET indicator will not reset in normal

operaons.

NOTE: Dead baery voltage is approximately 7.2 to 7.5 volts.

3. Unit should be OFF when replacing baery.

4. To replace the baery:

a. Remove the cover from the back of the instrument.

b. Remove the baery from the case.

c. Connect a new baery to terminals and insert it into the baery compartment.

d. Replace the baery cover by sliding it carefully in the grooves provided. Do not over force

the cover on.

Rev. B / February 2005

PDT-740B Stac Decay Timer

If the cover does not re-install easily, remove the baery and reinsert for a beer ﬁt. Be

sure wires do not hamper closing the baery cover.

e. The PDT-740B is now ready for use.

B. Storage & Cleaning

1. The unit should be stored in clean, dirt free condions 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 linng cloth.

VII.ConnecƟng the PDT-740B to PFM-711A Fieldmeter

A. Mount the CPM-720 Charge Plate Assembly onto the PFM-711A in accordance with their manual

instrucons.

B. With both instruments’ power switch OFF, connect the analog cable between the PFM-711A Field

Meter and PDT-740B Stac 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.

GREEN LED

READY LIGHT

ANALOG INPUT

JACK

CUT-OFF VOLTAGE

SELECTOR SWITCH

ON/OFF SWITCH

RED LED TIMING

IN PROGRESS

6Rev. B / February 2005

PDT-740B Stac Decay Timer

C. Slide the PFM-711A power switch to kV/inch to energize the ﬁeld meter

D. Slide the PDT-740B ON/OFF switch to ON.

E. The system is ready for use

VIII. Normal OperaƟon for IonizaƟon StaƟc Decay Measurements

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 kV/inch posion and ZERO the instru-

ment.

2. Note: Your hand should not make contact with, nor obstruct the CPM-720 Charge Plate Assem-

bly in any way.

Rev. B / February 2005

PDT-740B Stac Decay Timer

B. Turn ON PDT-740B Timer and select 100 Cut OﬀVoltage

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 Stac Decay Timer automacally:

2. Resets its display to ZERO (00.0)

3. Turns ON its Green LED, which provides Decay Cycle

Ready indicaon.

C. Assuming you are auding a desk top blower, posion

the CPM-720 Charge Plate in the ionizers air ﬂow approxi-

mately 12 inches from air output grid

D. As the ionizer neutralizes CPM voltage, the ﬁeld meter

voltage will drop below ±1,000 volts, at which me:

1. The Green LED Decay Cycle Ready automacally goes OFF

2. The PDT-740B LCD display begins ming funcon in seconds

3. The PDT-740B Red LED Timing in Progress automacally comes ON and stays ON unl 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 Stac Decay Timer

E. Repeat the above procedure for addional measurements.

IX. SuggesƟon “A” for Material StaƟc Decay 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 ﬁgures below and proceed as described.

Rev. B / February 2005

PDT-740B Stac Decay Timer

A. Setup PFM-711A Field Meter, PCS-720 Charge Plate and PDT-740B Stac 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 Stac 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 kV/inch posion and ZERO the instru-

ment.

2. Note that the PFM-711A Field Meter and CPM-720 Charge Plate Assembly may lay on a

grounded conducve worksurface or be aached 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 OﬀVoltage

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 Stac Decay Timer automacally:

1. Resets its display to ZERO (00.0)

2. Turns ON its Green LED, which provides Decay Cycle Ready indicaon.

10 Rev. B / February 2005

PDT-740B Stac Decay Timer

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