Prostat PDT-740B User manual

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
© 2011 by Prostat® Corporaon. 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 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.
5
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.
7
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.
9
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