WPI A310 Accupulser User manual

A310 Accupulser™
Pulse Generator
INSTRUCTION MANUAL
Serial No._____________________
032807
World Precision Instruments
www.wpiinc.com

A310 Accupulser™ Pulse Generator
WORLD PRECISION INSTRUMENTS 21
Copyright © 2001 by World Precision Instruments, Inc. All rights reserved. No part of this publication may be
reproduced or translated into any language, in any form, without prior written permission of World Precision
Instruments, Inc.
CONTENTS
INTRODUCTION............................................................................................................................1
SAFETY..............................................................................................................................................2
PREPARATION FOR USE .............................................................................................................4
Shipping Information ........................................................................................................4
Installation ............................................................................................................................4
Line Fuse................................................................................................................................5
Tilt Bail....................................................................................................................................5
Rack Mounting....................................................................................................................5
CONTROLS, INDICATORS & CONNECTORS.........................................................................6
Front Panel............................................................................................................................6
Rear Panel.............................................................................................................................9
OPERATING DIRECTIONS ........................................................................................................10
Pulse......................................................................................................................................10
Train ......................................................................................................................................13
MAINTENANCE............................................................................................................................15
Cleaning...............................................................................................................................15
Test ........................................................................................................................................15
SPECIFICATIONS..........................................................................................................................17
WARRANTY ..................................................................................................................................18

A310 Accupulser™ Pulse Generator
WORLD PRECISION INSTRUMENTS 1
INTRODUCTION
The Model A310 Accupulser™ is a second generation pulse generator/stimulator
that combines the reproducibility and accuracy of digital electronics with the fine
resolution and continuous adjustment characteristics of analog circuitry. All of the
A310's timing parameters are entered via ten-turn readable controls and six-position
range switches. Combining the accuracy of ten-turn dials with the A310's highly
linear circuitry allows the outputs to be accurate to within 1% of the set value, over a
range of seven orders of magnitude.
The A310 can produce single or double pulses in either continuous run, single-shot
or train/burst modes. The duration of the train/burst is easily controlled by using the
onboard envelope generator or by externally provided potential or dry-contact gating
inputs.
Five separate outputs are available from the A310. The ISOLATOR output is designed
to drive a WPI stimulus isolator and is also compatible with TTL and 5-volt CMOS
circuits. The MONITOR output provides 10-15 volt (up to 50 milliampere) signals for
viewing the output on an oscilloscope/recorder or for controlling other devices. A pair
of low noise, VARIABLE outputs are amplitude variable from zero to +10 volts and
-10 volts, in two ranges, with a resolution of one millivolt. The TTL and 5 volt CMOS
compatible, SYNC output provides short duration pulses which are synchronized with
the beginning of each output interval.
Panel lights indicate when the user set parameters result in logical timing violations
and when the outputs are active.

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WORLD PRECISION INSTRUMENTS 2
SAFETY
Terminology
WARNING statements identify conditions or practices that could result in personal
injury or loss of life.
CAUTION statements identify conditions or practices that could result in damage to
the equipment or other property. When marked on the instrument, it also indicates a
personal injury hazard not immediately accessible as you read the marking.
Do Not Use With Humans
Warning: This instrument is for investigational use only in animals or
other tests that do not involve human subjects.
Power Source
This instrument is intended to operate from a power source that will not apply
more than 250 volts rms between the supply (mains) conductors or between either
supply conductor and ground. A protective (safety) ground connection by way of the
grounding conductor (green with yellow stripe) in the power cord is essential for safe
operation.
Grounding the Instrument
This instrument is grounded through the grounding conductor of the power cord.
To avoid electrical shock, plug the power cord into a properly wired receptacle
before connecting to the instrument input and output terminals. A protective ground
connection by way of the grounding conductor in the power cord is essential for safe
operation.
Warning: You must not remove or in any way bypass the grounding pin of
the power cord.

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WORLD PRECISION INSTRUMENTS 3
Use the Proper Power Cord
Use only the power cord specified for your instrument and locale. Use only a power
cord that is in good condition.
Use the Proper Fuse
To avoid a fire hazard, use only the fuse specified for your instrument. Replacement
fuses shall be identical in type, voltage rating, and current rating. Line fuses must
match the selected voltage source of AC power and must be changed when the
nominal voltage range is changed.
Do Not Operate in Explosive Atmospheres
To avoid explosion, do not operate this instrument in an atmosphere of explosive
gases.
Do Not Remove Covers or Panels
To avoid personal injury, do not remove covers or panels from this instrument. Do not
operate the instrument without properly installed covers or panels.

A310 Accupulser™ Pulse Generator
WORLD PRECISION INSTRUMENTS 4
PREPARATION FOR USE
This section describes the initial preparations required when the A310 Accupulser™
is first placed into operation. Review the Safety guidelines on pages 4-5 before
proceeding.
Shipping Information
The A310 Accupulser™ is packaged and shipped in a foam-packed container. This
manual and any options will be included with the instrument. Upon receipt of
the the instrument, make a thorough inspection for proper contents and possible
shipping damage. If reshipment is necessary, use the original container. If the original
container is not available, use any suitable substitute that is rigid and of adequate
size. Wrap the instrument in paper and surround with at least 100 mm (four inches)
of shock absorbing material.
Installation
Input Power
CAUTION: The A310 Accupulser™ may be damaged if the Line Voltage
Selector switch is not set to match the applied AC power source or the wrong
line fuse is installed.
This instrument operates from either a 120V or 240V nominal AC power source. The
rear panel is marked at the factory with the user’s expected mains power. Before
connecting the power cord, verify that, in fact, the correct mains power setting was
provided and the appropriate line fuse is installed. If any doubt remains, the internal
Line Voltage Selector switch may be adjusted.
Warning: Before removing the cover, disconnect the instrument from the
ac power source.
The switch is located inside the instrument. To verify the voltage setting:
1. Remove the four screws (two on each side) on the side panels of the top cover.
2. Remove the instrument cover by sliding it straight upward.
3. Find the power supply printed wiring board next to the right side of the instrument.

A310 Accupulser™ Pulse Generator
WORLD PRECISION INSTRUMENTS 5
4. Locate the slide switch on the board and slide to the appropriate voltage setting.
The actuator is marked and the visible marking is the actual voltage setting, i.e. 115V
or 230V.
5. Reassemble the instrument by reversing the order of the above steps.
Line Fuse
Warning: Before attempting fuse replacement, disconnect the instrument
from the ac power source.
The instrument contains one fuse, located in the fuseholder on the back panel. The
fuseholder is opened by inserting a screwdriver in the slot, pressing lightly, and
twisting the cap 1/8-turn counterclockwise. Verify that the fuse contained in the
fuseholder matches the desired line voltage. If necessary, replace the fuse with the
type and rating specified on the back panel.
Tilt Bail
The instrument is provided with a tilt bail. If use is desired, lift the front edge of the
instrument, swing the bail down and forward, and snap into place.
Rack Mounting
The instrument may be provided with a rack mounting kit for a standard 19 inch
rack. Each mounting ear is assembled with two screws.

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WORLD PRECISION INSTRUMENTS 6
CONTROLS, INDICATORS & CONNECTORS
Front Panel
Input
MODE ..................................A four position rotary switch selects the source of the
operation control signal.
CONTINUOUS ON............provides a continuously running internal time base
established by the setting of the EVENT INTERVAL controls.
EXT SYNC ...........................replaces the EVENT INTERVAL time base by an external,
user-provided signal.
SINGLE EVENT ..................replaces the EVENT INTERVAL time base by a one-time
signal provided by the user pressing the push button.
EXT GATES .........................is the same as the CONTINUOUS ON mode, except that the
internal time base is only on when the appropriate signal is
applied to either of the two EXT GATES connectors.
EXT SYNC ...........................BNC connector input for an external signal to replace the
internal EVENT INTERVAL time base. Connector is only
active when selected by the MODE switch. The signal should
be positive on the center pin, referenced to the shell.
SINGLE EVENT ..................A momentary push-button switch provides a single pulse
or sequence of pulses each time the switch is pressed. The
switch is only active when selected by the MODE switch.
EXT GATES .........................Two BNC connectors provide external signal input, which
switches the internal EVENT INTERVAL time base on and off.
The connectors are only active when selected by the MODE
switch. The VOLTAGE signal should be positive on the center
pin, referenced to the shell. The SWITCH signal is a short-
circuit between the center pin and the shell.

A310 Accupulser™ Pulse Generator
WORLD PRECISION INSTRUMENTS 7
Pulse Generator
EVENT INTERVAL..............A ten-turn dial with an associated six-position rotary switch
are used to control the internal time base of the instrument.
The number set on the dial is multiplied by the position of
the Range switch. For example, 1.28 on the dial and x1ms
on the switch, represent an event interval of 1.28 ms.
EVENT DELAY....................A ten-turn dial with an associated six-position rotary switch
are used to control the delay between the internal or
external pulse starting the event interval and the beginning
of the first pulse in the event.
PULSE WIDTH....................A ten-turn dial with an associated six-position rotary switch
are used to control the duration of the pulse(s) within the
event interval.
SINGLE/DOUBLE ..............A two-position switch used to select a “twin” pulse. In the
SINGLE PULSE mode, the first pulse in an event appears
after the elapse of the event delay. In the DOUBLE mode, in
addition of the normal pulse(s) of the event interval, a pulse
is generated coincident with the beginning of the event
interval and of the same duration as the other pulse(s) of the
event interval. This feature is functional in both the pulse
and the train generation modes.
Train Generator
ON/OFF ...............................A two-position switch used to enable and disable the train
generator function of the instrument.
TRAIN DURATION ............A ten-turn dial with an associated six-position rotary switch
are used to control the duration of the train of pulses. The
length of the train may be longer than the value set on the
dial because the last pulse of the train is, by design, of the
same duration as the earlier pulses.
PULSE INTERVAL ..............A ten-turn dial with an associated six-position rotary switch
are used to control the time interval between the beginnings
of the pulses within a train.

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WORLD PRECISION INSTRUMENTS 8
Output
AMPLITUDE ......................A ten-turn dial with an associated four-position rotary switch
are used to control the amplitude of the signal through
the -VARIABLE and the +VARIABLE output connectors. The
number set on the dial is the actual value of the output
voltage, depending on the full scale value selected by the
position of the AMPLITUDE switch. For example, 10.00 on
the dial and DC x1V on the switch, represent a constant
-1.0V on the -VARIABLE and +1.0V on the +VARIABLE
outputs.
The DC positions represent a non-switching DC output
voltage even when the other outputs are providing
pulses. The PULSED positions provide switched outputs,
synchronous with the other outputs. DC outputs with the
least amount of “noise” are obtained by switching the INPUT
MODE out of CONTINUOUS ON and not providing an
external input.
-VARIABLE...........................A BNC connector used to provide a variable output signal.
Signal polarity on the center pin is negative relative to the
connector shell.
+VARIABLE.........................A BNC connector used to provide a variable output signal.
Signal polarity on the center pin is positive relative to the
connector shell.
VIOLATION.........................A red light, which is illuminated for approximately one
second, whenever the instrument is operating with timing
parameters that are in conflict with each other. Violations
are defined as follows:
EVENT DELAY is greater than EVENT INTERVAL.
PULSE WIDTH extends into the next EVENT INTERVAL.
TRAIN DURATION extends into the next EVENT INTERVAL.
PULSE WIDTH is greater than PULSE INTERVAL.

A310 Accupulser™ Pulse Generator
WORLD PRECISION INSTRUMENTS 9
OUTPUT ..............................A green light, which is illuminated during the length of
the PULSE WIDTH and the TRAIN DURATION. The light
may not be visible when short pulses are generated with
large intervals between pulses. The light will appear to be
continuously on when pulses are generated with very short
intervals between pulses.
SYNC ....................................A BNC connector used to provide a narrow pulse at the
beginning of each EVENT INTERVAL. The signal on the
center pin is positive relative to the connector shell.
ISOLATOR...........................A BNC connector used to provide output pulses in
accordance with the preset timing parameters. The signal on
the center pin is positive relative to the connector shell. This
output is compatible with WPI Stimulus Isolators.
MONITOR ...........................A BNC connector used to provide output pulses in
accordance with the preset timing parameters. The signal on
the center pin is positive relative to the connector shell.
Power
POWER Light......................A green light, which is illuminated whenever mains power is
connected to the instrument and the POWER switch is ON.
POWER Switch...................A two-position switch used to apply mains power to the
instrument.
Rear Panel
Connector ...........................Polarized, 3-conductor, IEC320/CEE-22 connector is used
for line (mains) power input to the instrument. A removable
cordset, terminated with a NEMA 5-15P connector, is
standard. An alternate cordset may be supplied when
local circumstances dictate different mains voltages and
connections.
Fuseholder..........................Used for protective fuse in series with the high side (brown
or black wire) of the mains. Holder accepts 1/4 by 1-1/4 inch
(6.35mm by 31.8mm) fuses of the type indicated on the rear
panel.

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WORLD PRECISION INSTRUMENTS 10
OPERATING DIRECTIONS
The Model A310 Accupulser™ is designed to make the operation of the instrument
as self-explanatory as possible. Extensive graphics are provided on the front panel to
guide the user with the function of each of the controls and connectors. Before using
the following instructions, it is recommended that the user should read about each
panel component in the Controls, Indicators and Connectors section of this manual.
The following operating directions are provided as typical instrument setups, that
would result in valid operating modes.
Pulse
In the pulse mode, the instrument provides single or double pulses of user set widths.
The train generator is disabled by the user. In the single pulse mode, the pulse is
delayed after the start of the event interval. In the double pulse mode, a second pulse
is provided, starting at the same time as the event interval.
In the CONTINUOUS ON input mode, the time parameters for the event interval,
the event delay and the pulse width are set on the panel controls by the user. In the
EXT SYNC input mode, the internal clock is disabled and the event interval starts
whenever an input sync pulse is applied. In the SINGLE EVENT mode, one event
interval occurs for each push on the switch. In the EXT GATES input mode, the panel
set event interval time is active as long as either of the gate signals is active. The EXT
GATES feature allows the generation of a train of train pulses. At the OUTPUT SYNC
connector, a narrow pulse is provided every time an event interval starts.
The output signal from the instrument is available at four different connectors. The
time parameters at each of the connectors are identical. The differences among the
outputs are due to the amplitude of the signal and the source/sink current capability
of each circuit. These differences are described in the Specification section of this
manual.
It is possible to set the panel controls so that conflicting timing parameters are
provided. In order to assist the user, the VIOLATION light is illuminated for one
second, whenever one time interval improperly overlaps another. As a further aid, the
OUTPUT light is illuminated for the duration of every output pulse and train duration.

A310 Accupulser™ Pulse Generator
WORLD PRECISION INSTRUMENTS 11
The pulse mode may be
demonstrated with the panel controls
set as follows. The instrument
should provide the waveform shown
on Figure 1, at the SYNC and the
ISOLATOR OUTPUT connectors.
INPUT MODE CONTINUOUS ON
EVENT INTERVAL dial 1.80
EVENT INTERVAL switch x1 ms (i.e. event interval is 1.8 ms)
EVENT DELAY dial 4.00
EVENT DELAY switch x100 µs (i.e. event delay is 0.4 ms)
PULSE WIDTH dial 1.00
PULSE WIDTH switch x100 µs (i.e. pulse width is 0.1 ms)
SINGLE/DOUBLE PULSE SINGLE
TRAIN GENERATOR OFF
AMPLITUDE dial 5.00
AMPLITUDE switch PULSED x10V (i.e. ± 5V DC amplitude)
POWER ON
Vary the three PULSE GENERATOR dials and notice how the waveform timing follows
the dial values. Note that the OUTPUT light is dimly lit, reflecting the fact that the
pulse width is 1/18 of the event interval duration. Try to extend the pulse into the
next event interval. This may be
accomplished by increasing the
delay or increasing the pulse width
or decreasing the event interval. As
soon as the pulse width overlaps the
beginning of the next interval, the
VIOLATION light should illuminate.
Switch SINGLE/DOUBLE PULSE to
DOUBLE and note that a second
pulse appears as shown on Figure 2.
Fig. 1
Fig. 2
5 µs
1.8 ms EVENT INTERVAL
0.4 ms EVENT DELAY
0.1 ms PULSE WIDTH
ISOLATOR
SYNC
1.8 ms EVENT INTERVAL
5 µs
0.4 ms EVENT DELAY
0.1 ms PULSE WIDTH
ISOLATOR
SYNC
0.1 ms wide DOUBLE PULSE

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WORLD PRECISION INSTRUMENTS 12
Change the output connection to the MONITOR connector. Note that the waveform
timing does not change, but that the pulse amplitude more than doubles.
Change the output connection to the +VARIABLE connector. Again note, that the
timing remains the same, but the amplitude drops to the previously set +5 volts. Vary
the AMPLITUDE dial and notice how the amplitude follows the value on the dial.
Switch the AMPLITUDE to PULSED x1V and the signal amplitude drops to 1/10 of the
previously observed value. Switch the AMPLITUDE to DC x1V and the output changes
to a steady voltage, which can still be varied with the AMPLITUDE dial. Switch
AMPLITUDE to DC x10V and the output voltage increases ten-fold.
Change the output connection to the -VARIABLE connector. Repeat the steps of the
previous paragraph and note that all the output conditions remain the same except
that all the output voltages are negative.
Switch the INPUT MODE to EXT SYNC, then to SINGLE EVENT. In both modes the
output signal goes to zero volts. Press the SINGLE EVENT button and note that a
single event interval is generated from the output. Switch to EXT GATES. The output
should still be zero. Short circuit the EXT GATES SWITCH connector and note that
as long as the connection is held, the output produces waveforms. As soon as the
connection is broken, the output returns to zero. The EXT SYNC and the EXT GATES
VOLTAGE input modes can be verified by applying the appropriate signal to the
connectors. For each EXT SYNC pulse, one event interval is generated. As long as the
EXT GATES VOLTAGE is applied, the output will produce waveforms.

A310 Accupulser™ Pulse Generator
WORLD PRECISION INSTRUMENTS 13
Train
In the train mode, the instrument provides all the functions of the pulse mode. In
addition, the single pulse can be expanded to a train of pulses. The double pulse at
the beginning of the event interval, remains as one pulse. The violation function is
expanded to include overlapping
train timing parameters.
The train mode may be
demonstrated with the panel controls
set as follows. The instrument should
provide the waveform shown on
Figure 3, at the ISOLATOR OUTPUT
connector. The other outputs behave
in the same manner as in the above
described pulse mode example.
INPUT MODE CONTINUOUS ON
EVENT INTERVAL dial 1.80
EVENT INTERVAL switch x1 ms (i.e. event interval is 1.8 ms)
EVENT DELAY dial 4.00
EVENT DELAY switch x100 µs (i.e. event delay is 0.4 ms)
PULSE WIDTH dial 1.00
PULSE WIDTH switch x100 µs (i.e. pulse width is 0.1 ms)
SINGLE/DOUBLE PULSE DOUBLE
TRAIN GENERATOR ON
TRAIN DURATION dial 1.05
TRAIN DURATION switch x1 ms (i.e. train duration is 1.05 ms)
PULSE INTERVAL dial 2.00
PULSE INTERVAL switch x100 µs (i.e. pulse interval is 0.2 ms)
POWER ON
Vary the two TRAIN GENERATOR dials and notice how the waveform timing follows
the dial values. Note that the OUTPUT light is now brighter than in the pulse mode
example. This is due to the fact that the train duration plus the double pulse are
11.5/18 of the event interval duration.
Fig. 3
1.8 ms EVENT INTERVAL
5 µs
0.4 ms EVENT DELAY
ISOLATOR
SYNC
0.2 ms PULSE INTERVAL
1.05 ms TRAIN
DURATION

A310 Accupulser™ Pulse Generator
WORLD PRECISION INSTRUMENTS 14
Try to extend the train duration into the next event interval. This may be
accomplished by increasing the delay or increasing the train duration or decreasing
the event interval. As soon as the train duration overlaps the beginning of the next
interval, the VIOLATION light should illuminate. Increasing the pulse width to equal
the pulse interval will also result in a violation.
With the above train timing parameters, five pulses fit into the train duration.
Decrease the train duration and at some point, the number of pulses suddenly drops
to four. The sudden change is due to the requirement that only full-width pulses are
to be generated. Thus, it is normal that the preset train duration is shorter than the
actual length.

A310 Accupulser™ Pulse Generator
WORLD PRECISION INSTRUMENTS 15
MAINTENANCE
Cleaning
CAUTION: Do not use alcohol, aromatic hydrocarbons or chlorinated
solvents for cleaning. They may adversely react with plastic materials
used to manufacture the instrument.
The exterior of this instrument may be cleaned periodically to remove dust, grease
and other contamination. There is no need to clean the inside. Use a soft cloth
dampened with a mild solution of detergent and water. Do not use abrasive cleaners.
Test
The Model A310 Accupulser™ can be tested by following the steps in the Operating
Directions section of this manual. A different and more specific test is described
below. To perform all the tests, a voltmeter and an oscilloscope will be required.
Set the front panel controls as follows:
INPUT MODE CONTINUOUS ON
EVENT INTERVAL 10 s
EVENT DELAY 550 µs
PULSE WIDTH 100 s
SINGLE/DOUBLE PULSE SINGLE PULSE
TRAIN GENERATOR OFF
AMPLITUDE dial 10.00
AMPLITUDE switch PULSED x10V
Switch POWER to ON
Verify during the waveform “on” cycle, with the voltmeter, that the given voltages
exist at each connector.
-VARIABLE -10VDC
+VARIABLE +10VDC
MONITOR +10 to +15VDC
ISOLATOR +3.5 to +5.1VDC

A310 Accupulser™ Pulse Generator
WORLD PRECISION INSTRUMENTS 16
Also verify that,
POWER light is on
VIOLATION light is flashing 1s on and 9s off
OUTPUT light is on when any output is on
Vary the AMPLITUDE dial and verify with the voltmeter that both the -VARIABLE and
the +VARIABLE outputs follow the value on the dial.
Switch the AMPLITUDE to PULSED x1V and again verify with the voltmeter that both
the -VARIABLE and the +VARIABLE outputs follow the value on the dial.
Reset the front panel controls as follows:
EVENT INTERVAL 1 ms
EVENT DELAY 550 µs
PULSE WIDTH 100 µs
TRAIN GENERATOR ON
TRAIN DURATION 450 µs
PULSE INTERVAL 200 µs
Connect the oscilloscope. If a two channel instrument is available, it is recommended
that the SYNC output is connected to channel one and the alternate output to
channel two. The oscilloscope trigger should be taken from channel one. Verify that
the above set waveforms are provided from each of the following connectors:
-VARIABLE
+VARIABLE
MONITOR
ISOLATOR
Also verify that,
The OUTPUT SYNC connector provides approximately 5 µs wide pulses
POWER light is on
VIOLATION light is continuously on
Reduce the TRAIN DURATION to 300 µs and note, that while passing 400 µs, the
VIOLATION light goes off and the third pulse disappears.
Switch from SINGLE PULSE to DOUBLE PULSE and note that an extra pulse appears
at the same time as the beginning of the SYNC pulse.
Switch INPUT MODE to SINGLE EVENT and note on the oscilloscope that the output
goes to zero.
Press the SINGLE EVENT button and note that one and only one waveform is
generated from the outputs.

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WORLD PRECISION INSTRUMENTS 17
SPECIFICATIONS
Timing Parameters ............accuracy better than 1% of set value, each parameter is
continuously variable, through two orders of magnitude,
in six ranges
EVENT INTERVAL...................100 µs to 1000 s
EVENT DELAY.........................10 µs to 100 s
PULSE WIDTH.........................10 µs to 100 s
TRAIN DURATION .................100 µs to 1000 s
PULSE INTERVAL ...................20 µs to 100 s (50 KHz max pulse frequency)
Inputs
EXT SYNC ................................accepts 1µs minimum pulses
TTL, CMOS, RS232C compatible
EXT GATES VOLTAGE............accepts 1µs to ∞ pulses
TTL, CMOS, RS232C compatible
EXT GATES SWITCH..............any switch closure, 5 mA max source
Outputs
SYNC .........................................≈5 µs, TTL & 5V CMOS compatible, 20 mA max sink and
source
ISOLATOR................................TTL & 5V CMOS compatible, 20 mA max sink and source
MONITOR ................................10-15 VDC, 50 mA max sink and source
+VARIABLE/-VARIABLE ........0 to ±1 V low range, 1 mV resolution
0 to ±10 V high range, 10 mV resolution
5 mA max sink and source
<500 µV PULSED noise @ 100 kHz band width
<500 µV DC noise, wide band
<1 ohm output impedance
Signal Ground.......................connected to chassis ground, removable
Power ......................................95-130 VAC or 190-260 VAC, switch selectable single
phase, 50/60 Hz, 20 VA
Temperature.........................10° C (50° F) to 40° C (104° F)
Dimensions ...........................Height: 134 mm (5.25 in.) plus 16 mm (0.6 in.)
removable bail
Width: 432 mm (17.0 in.)
Depth: 242 mm (9.5 in.)
Mountable in standard ANSI/EIA RS310C 19 in. rack
Weight.....................................4.1 kg (9 lb), 5.5 kg (12 lb) shipping

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WORLD PRECISION INSTRUMENTS 18
WARRANTY
WPI (World Precision Instruments, Inc.) warrants to the original purchaser that this equipment, including its
components and parts, shall be free from defects in material and workmanship for a period of one year* from the
date of receipt. WPI’s obligation under this warranty shall be limited to repair or replacement, at WPI’s option, of
the equipment or defective components or parts upon receipt thereof f.o.b. WPI, Sarasota, Florida U.S.A. Return of
a repaired instrument shall be f.o.b. Sarasota.
The above warranty is contingent upon normal usage and does not cover products which have been modified
without WPI’s approval or which have been subjected to unusual physical or electrical stress or on which the
original identification marks have been removed or altered. The above warranty will not apply if adjustment,
repair or parts replacement is required because of accident, neglect, misuse, failure of electric power, air
conditioning, humidity control, or causes other than normal and ordinary usage.
To the extent that any of its equipment is furnished by a manufacturer other than WPI, the foregoing warranty
shall be applicable only to the extent of the warranty furnished by such other manufacturer. This warranty will not
apply to appearance terms, such as knobs, handles, dials or the like.
WPI makes no warranty of any kind, express or implied or statutory, including without limitation any warranties
of merchantability and/or fitness for a particular purpose. WPI shall not be liable for any damages, whether direct,
indirect, special or consequential arising from a failure of this product to operate in the manner desired by the
user. WPI shall not be liable for any damage to data or property that may be caused directly or indirectly by use
of this product.
Claims and Returns
• Inspect all shipments upon receipt. Missing cartons or obvious damage to cartons should be noted on the
delivery receipt before signing. Concealed loss or damage should be reported at once to the carrier and an
inspection requested. All claims for shortage or damage must be made within 10 days after receipt of shipment.
Claims for lost shipments must be made within 30 days of invoice or other notification of shipment. Please save
damaged or pilfered cartons until claim settles. In some instances, photographic documentation may be required.
Some items are time sensitive; WPI assumes no extended warranty or any liability for use beyond the date
specified on the container.
• WPI cannot be held responsible for items damaged in shipment en route to us. Please enclose merchandise in
its original shipping container to avoid damage from handling. We recommend that you insure merchandise
when shipping. The customer is responsible for paying shipping expenses including adequate insurance on all
items returned.
• Do not return any goods to WPI without obtaining prior approval and instructions (RMA#) from our returns
department. Goods returned unauthorized or by collect freight may be refused. The RMA# must be clearly
displayed on the outside of the box, or the package will not be accepted. Please contact the RMA department for
a request form.
• Goods returned for repair must be reasonably clean and free of hazardous materials.
• A handling fee is charged for goods returned for exchange or credit. This fee may add up to 25% of the sale
price depending on the condition of the item. Goods ordered in error are also subject to the handling fee.
• Equipment which was built as a special order cannot be returned.
• Always refer to the RMA# when contacting WPI to obtain a status of your returned item.
• For any other issues regarding a claim or return, please contact the RMA department
Warning: This equipment is not designed or intended for use on humans.
* Electrodes, batteries
and other consumable
parts are warranted
for 30 days only from
the date on which the
customer receives these
items.
World Precision Instruments, Inc.
International Trade Center, 175 Sarasota Center Blvd., Sarasota FL 34240-9258
Tel: [phone] • Fax: [phone] • E-mail: [e-mail]
UK: Astonbury Farm Business Centre • Aston, Stevenage, Hertfordshire SG2 7EG • Tel: [phone] • Fax: [phone] • E-mail: [email protected]
Germany: Liegnitzer Str. 15, D-10999 Berlin • Tel: [phone] • Fax: [phone] • E-mail: [email protected]