UDT Instruments 301DIV User manual

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Find the UDT Instruments 301-DIV at our website: Click HERE

Model 301DIV
SIGNAL CONDITIONING AMPLIFIER
Revision B
July 20, 2005
UDT Instruments
8581 Aero Drive
San Diego, CA 92123
Phone [phone]
Fax [phone]

Dear Valued Customer:
The conventional fuse in your Model 301-DIV has been replaced with a self-resetting fuse. This new “fuse” is actually a
PTC (positive thermal coefficient) device, which significantly increases resistance when current in the 301-DIV reaches an
unsafe level. This change was made to better protect your 301-DIV and to eliminate the need for you to send the 301-DIV
back to the manufacturer if a fuse is accidentally blown.
If the PTC device has either shut down your equipment or has increased resistance to the point where it affects unit
performance, simply turn off the equipment and allow the PTC device to cool for about 15 to 20 seconds. The 301-DIV
may then be turned back on.
Please note that the most common way in which current is increased to an unsafe level is by improperly biasing the
detector diode. If there is any doubt as to the correct way to bias your particular detector, please contact UDT
Instruments technical support.
UDT Instruments • 8581 Aero Drive • San Diego, CA 92123
Phone [phone] Fax [phone]

MODEL 301DIV
SIGNAL CONDITIONING AMPLIFIER
The Model 301DIV amplifier
module is a member of UDT’s
growing family of conditioning
amplifiers. It interfaces position-
sensing photodetectors with
indicators and controls supplied by
the user.
This versatile system is
used with bi-cells and quadrant
detectors for nulling and centering
operations, or with lateral-effect
detectors for continuous position
measurement. It can also be used
to normalize the differential output
of two discrete-element detectors.
The Model 301DIV
provides transimpedance
amplifiers to condition the detector
signals, as well as the differential
amplifiers necessary to generate a
position-related analog output.
Two modules are required when
monitoring both axes of quadrant
or lateral-effect detectors. With
dual-axis systems, the Model 1000
electronic collimator is available for
measuring very small changes in
angular displacement.
In addition to measuring
differential output to determine
position, the system also divides
by the summed output in order to
cancel the effects of variations in
incident light intensity during
measurement.
The amplifier module’s six
selectable input ranges
accommodate detector signals
ranging from 3 µA to 2 mA. LED
indicators help users select the
proper range setting. Output
signals are normalized to 10V
maximum, user adjustable.
The standard Model
301DIV has a frequency range of
DC to 5 kHz. A 30 kHz version is
also available for high-speed
applications.
COMPLETE DETECTOR/
CABLE ASSEMBLIES.
For ease of installation and
accuracy of measurement, UDT
offers detector/cable assemblies
which ensure proper
interconnection between
photodetector and amplifier pins.
UDT photodetectors are
selected for high responsivity, low
noise, long-term stability,
uniformity, and linearity over a
wide dynamic range.
OTHER FAMILY MEMBERS
The Model 431 is a dual-channel
amplifier that provides a digital
display of X and Y positions. And
the Op-Eye series of multi-channel
computer interfaces provide cost-
effective conditioning of optical
sensors for use with popular
computers. Op-Eye systems can
accommodate up to 4 dual-axis
detectors, 8 single-axis detectors,
16 discrete sensors, or any
combination thereof. Systems are
available for Apple II and IBM
personal computers and their
compatibles, any computer having
an RS-232C or IEEE-488 port, and
computers that have an internal
A/D converter.
APPLICATIONS
Applications are many and varied.
UDT remote position-sensing
sensors are used in centering and
nulling operations measurement of
position of robotics and other
production equipment, alignment
of machine tools, measurement of
the curvature of optical surfaces,
and laser alignment.
Simplified Block Diagram
of 301DIV
UDT Instruments • 8581 Aero Drive • San Diego, CA 92123
Phone [phone] Fax [phone]

301DIV OPERATING
INSTRUCTIONS
1. Connect detector(s) in
accordance with detector
connection instructions.
2. Select detector polarity:
Common anode for UDT, LSC
and SC series, or common
cathode for SPOT series.
3. Select detector bias. Caution:
15V bias and wrong polarity
can damage detectors.
4. Connect 301DIV to AC line,
and connect monitor
instruments such as digital
voltmeters, oscilloscopes or
recorders, to sum and position
outputs.
5. Illuminate the detector.
6. Turn instrument power on.
7. Check that the sum output is
positive. If it is not, check
detector wiring, and verify
detector polarity.
8. Set range switch for proper
sensitivity. Select highest
position possible, without
lighting HI light level LED.
9. It is recommended that
Schottky barrier detectors be
biased, for maximum lifetime
and performance. Schottky
detectors can be identified by
absence of a “D” suffix in their
model number. Lateral-effect
devices tend to saturate at
moderate light levels. This
may be observed by scanning
a light spot across the
detector along one axis. If the
sum output (sum of X and Y-
axes for dual-axis operation)
shows a broad dip near the
center
of the detector, biasing is
required. Biasing may also
be desirable when using the
301DIV-30kHz. Since the
bias reduces the detector
junction capacitance, higher
speed response is possible
from the detector.
10. If it is necessary to adjust the
zero or range of the 301DIV
output to accommodate the
readout device, adjust the
CAL and ZERO
potentiometers with a small-
blade screwdriver. To return
full output to 10V, turn the
CAL potentiometer fully
clockwise. To return the
ZERO potentiometer to
electrical zero, select two 100
K ohm to 1 Meg ohm resistors
matched within 0.15%, and
connect one resistor between
each amplifier input pin (E
and D) and common (H).
Then adjust the zero
potentiometer for OV at the
position output connector.
DETECTOR CONNECTION
INSTRUCTIONS
If UDT detector/cable assemblies
are employed, connect the cable
output connector to the 301DIV
input.
If component level
detectors are to be used, carefully
connect as follows:
PIN-LSC/5D, PIN-LSC/30D.
Connect detector outputs (end
points) to amplifier inputs E and D,
and detector common (center pin)
to amplifier input H.
(See Fig. 1)
PIN-LSC/4, PIN-LSC/9.
Connect detector pins labeled (-)
to amplifier inputs E and D, and
detector common (+) to input H.
Only one (+) pin need be
connected. As usual, bias is
recommended when using
Schottky barrier devices.
(See Fig. 1)
PIN-SC/4D, PIN-SC/10D,
PIN-SC/25D
Two amplifiers are required for
dual-axis operation. Connect X-
pins to inputs E and D, and Y-pins
to inputs A and B on amplifier #1.
On amplifier #2, jumper inputs A
and B to inputs E and D. (Y-axis
pins may be directly connected to
amplifier #2 (if preferred). Also
connect detector common to input
H on amplifier #1 and interconnect
input F on both amplifiers.
(See Figs. 1 & 2)
PIN-SC/50
Same connections as for PIN-
SC/4D. As usual, bias is
recommended when using
Schottky barrier devices.
(See Figs. 1 & 2)
PIN-SPOT/2D
Connect detector outer pins to
inputs E and D, and detector
common to input H.
(See Fig. 1)
PIN-SPOT/4D, PIN-SPOT/9D
Two amplifiers required. Connect
same as PIN-SC/4D, except
connect detector common to input
F on amplifier #1.
(See Figs. 1 & 3)
For best results, insure that the
amplifier inputs are fully shielded.
Use input F for shield ground.
UDT Instruments • 8581 Aero Drive • San Diego, CA 92123
Phone [phone] Fax [phone]

Figure 1
Input Connector Orientation
Figure 2 Figure 3
Detector Orientation
UDT Instruments • 8581 Aero Drive • San Diego, CA 92123
Phone [phone] Fax [phone]

All dimensions in inches
SPECIFICATIONS
GAIN at sum output
Input Current Range (V/A) Frequency Bandwidth
1 mA to 3 mA 3K Standard DC to 5 kHz
300 µA to 1 mA 10K Optional DC to 30 kHz
100 µA to 300µA 30K (Model 301DIV-30kHz)
30 µA to 100 µA 100K
10 µA to 30 µA 300K DC drift 10 mV/C°for 10 V full scale
3 µA to 10 µA 1000K
Noise, rms 2 mV for 10 V full scale
Range Selector 6-position rotary switch
OutputImpedance
Detector bias Selectable 0 VDC (photovoltaic) Standard <1 ohm
or 15 VDC (photoconductive) 30 kHz version 100 ohm
Detector polarity Selectable common anode (LSC and Range Indicators HI/LO signal level LEDs aid in
SC series) or common cathode setting range switch to proper
(SPOTseries) value
Outputvoltage Output Adjustments
Sum GAIN x (ID + IE) CAL Adjustable scale factor for
Position (ID - IE) X 10 V position output
(ID + IE)
ZERO Provides ± 2.5 V zero offset
Output Voltage Range
Sum 0 to 10 V Power Requirements
Position ±10 V Standard Model 105 to 125 V, 50/60 Hz, 5 watts
(301DIV)
Output Connectors BNC
Optional Model 210 to 250 V, 50/60 Hz, 5 watts
Operating 0 to 50°C (301DIV-230 V)
Temperature
UDT Instruments • 8581 Aero Drive • San Diego, CA 92123
Phone [phone] Fax [phone]

UDT POSITION-SENSING DETECTOR/CABLE ASSEMBLIES
MODEL NBR DESCRIPTION
1232 PIN-SC/25D Detector/Cable Assembly
1233 PIN-SC/10D Detector/Cable Assembly
1237 PIN-SC/50 Detector/Cable Assembly
1238 PIN-LSC/5D Detector/Cable Assembly with 35-mm lens adaptor
1239 PIN-LSC/30D Detector/Cable Assembly with 35-mm lens adaptor
1240 PIN-SPOT-SC/9D Detector/Cable Assembly
1241 PIN-SC/4D Detector/Cable Assembly
1242 PIN-SPOT-2D Detector/Cable Assembly
--- PIN-LSC/4 Detector only
Website:
www.udtinstruments.com
RevB
July20,2005
UDT Instruments • 8581 Aero Drive • San Diego, CA 92123
Phone [phone] Fax [phone]

ADDENDUM: CE MARK EXCLUSIONS
1. The instrument is not intended for use in high humidity, high pollution, or explosive environments.
2. The instrument and related accessories are “CE” compliant when operated in the manufacturer’s recommended
configuration, and in accordance with the exclusions described in this addendum. UDT Instruments does not
accept responsibility for “CE” compliance if the instrument is used in a non recommended configuration.
3. All semiconductor devices are susceptible to electrostatic discharges (ESD). Ensure that the unit is switched off
before connecting or disconnecting any cable(s) or accessories. Failure to do so can cause “ESD” damage and
reduce the lifetime of the instrument drastically.
4. Units with ieee-488 capability must use a shielded cable; similar to Hewlett-Packard part number HP10833x or
Io-Tech part number CA-7-X, to maintain compliance.
5. All coaxial cables must be less than 3 meters long.
6. All battery-operated units have batteries that are not replaceable by the customer, and can only be charged with
the battery charger supplied with the unit by UDT Instruments.
7. Cleaning: Special care must be used when cleaning the instrument. The body, or any labels, should only be
cleaned with a soft damp cloth, and a very light concentration of mild soap. Failure to do so may scratch the
surface or damage any anti-glare coatings.
Never use alcohol, acetone, or other chemical solvents to clean any part of the unit.
UDT Instruments • 8581 Aero Drive • San Diego, CA 92123
Phone [phone] Fax [phone]

Product Warranty
Warranty Provisions Warranty Return Procedures
UDT Instruments warrants the items delivered Note: If this device has warranty and
hereunder to be free from defects in material and workmanship, calibration seals, all warranties and calibrations are void if
and to conform to current UDT Instruments specifications at the these seals are broken.
time of sale. Purchaser shall have a period of one year from date
of acceptance of the items to return deficient items to UDT 1. Please review terms of purchase and date of
Instruments for correction. Material will be considered accepted shipment to determine if product is warranted and whether
30 days after receipt by purchaser unless UDT Instruments is or not it is within warranty period. Adjustment cannot be
notified of acceptance earlier. made for product out of warranty.
UDT Instruments agrees to repair or replace at the place 2. If product is subject to warranty, prior to return of
of manufacture, without charge, all items returned, transportation product, telephone, write or fax UDT Instruments at the above
prepaid, for inspection at the UDT Instruments factory within address.
the warranty period, provided: (1) such inspection discloses to
the satisfaction of UDT Instruments that the defects are as above Product malfunctions should be reported to the Sales
specified; and, (2) the material has not been subjected to misuse, Department at the earliest possible time, since there are many
improper maintenance, negligence or accident, damaged by occasions when technical assistance may obviate the need for
excessive radiation, voltage, current or otherwise damaged by returning products or can prevent product damage. Upon
misuse. verification that warranty service is required, the Sales
Department will issue a Return Material Authorization number
The item returned shall only be accepted when (RMA number). The RMA number must appear on the
accompanied by a written statement setting forth the nature and outside of the shipping container for proper receipt.
suspected cause of the alleged deficiencies.
3. It is necessary in all instances that the “return
This warrant is expressly in lieu of all other warranties, report” form be completed. Please photocopy and fill out the
express, implied or statutory, and all other obligations or return report located in your product manual.
liabilities on the part of UDT Instruments. In no event shall
UDT Instruments be liable for claims, demands or damages of 4. Repack the product carefully in the same manner
any nature, however denominated, except that UDT Instruments it was originally packaged, preferably using the original
liability shall be to repair defective items at its factory, or supply shipping carton and packaging material. Pack the completed
replacement parts in accordance with the terms of this warranty. “return report” with the product making sure the RMA number
isclearlyvisibleonthe outside of the container. Ship the
When equipment is shipped FOB UDT Instrument’s product prepaid to UDT Instruments.
factory, and when said equipment fails to perform according
to specifications upon receipt, a claim should be made 5. UDT Instruments will advise your company of its’
immediately against the shipping agency. findings as to warranty consideration at the earliest possible
time.
SHIPMENT AND PAYMENT
UDT Instruments payment terms are Net 30 days.
Shipment will be made FOB Baltimore, MD.
UDT Instruments • 8581 Aero Drive • San Diego, CA 92123
Phone [phone] Fax [phone]

UDT INSTRUMENTS RMA FORM
8581 Aero Drive ●San Diego, CA 92123 Phone [phone] Fax [phone]
http://www.udtinstruments.com
RMA REQUEST DATE _____________ RMA NUMBER _____________ (assigned by UDT)*
Please check appropriate box: CALIBRATION REPAIR WARRANTY
BILL TO: SHIP TO:
ATTN: ATTN:
Street Address Street Address
City, State, Zip City, State, Zip
E-Mail Address Preferred Payment: Visa Master Card
Credit Card #
PHONE NUMBER
- - FAX NUMBER - - NAME ON CREDIT CARD/EXP DATE PO #
Please provide your shipping carrier, preferred method of shipment and shipping carrier account #
FEDEX UPS DHL Other __________________ Shipping Carrier Account # _________________
Method of Shipment (eg. Overnight, Next Day, 2nd Day, 3rd Day, Red, Blue, Orange, Ground) __________________
QTY INSTRUMENT DESCRIPTION INST. SERIAL # SENSOR DESCRIPTION SENSOR SERIAL #
Electrical Calibration of all meters (REQUIRED)….. $100.00
DETAILED CALIBRATION INSTRUCTIONS
QTY INSTRUMENT DESCRIPTION INST. SERIAL # SENSOR DESCRIPTION SENSOR SERIAL #
Electrical Calibration all meters (REQUIRED)….. $100.00
DETAILED CALIBRATION INSTRUCTIONS
TOTAL ESTIMATE: ________________ US Dollars
If the unit is in need of repair, an evaluation fee of $175.00 will apply. If the cost of the repair ex-
ceeds the evaluation fee, the customer will be notified for approval BEFORE any work is performed.
_____________________________ ____________________________ _______________
Tonda Arbaugh Customer Approval Date
[e-mail]
We would PREFER to use your shipping carrier when sending back your unit(s).
Otherwise, all orders will be shipped UPS Ground Pre-Paid and this fee will be
added to the invoice unless specified otherwise in the shipping carrier box above.
*RMA Numbers (upon issue from UDT Instruments) are valid for 60 calendar days!
Last updated October 2007

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