Sensor Developments 90305 User Manual

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Document ID	43864
Application ID	UNkOHir8OrIQsUVlh9hFOA==
Document Description	User Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	18.08kB (226053 bits)
Date Submitted	1999-06-23 00:00:00
Date Available	1999-07-30 00:00:00
Creation Date	1999-06-08 11:12:27
Producing Software	Photoshop PDF Plug-in 1.0
Document Lastmod	1999-06-08 11:13:12
Document Title	User Manual
Document Creator	Photoshop PDF Plug-in 1.0

‘
bensor
evelo ments Cine.
INNOVATIONS |N FORCE MEASUREMENT
Phone' (248) 39I-3000
Fax: (248) 39l-0I07
TELEMETRY TRANSMITTER
MODEL: 90305
Operators Manual
The transmitter consists of a strain gage amplifier, a 4 pole low pass butterworth filter, analog to
digital converter, control electronics‘ and a 900MHz radio transmitters Operation of the
transmitter is as follows:
L Connect the strain gage sensor to the sensor-input pins as shown in figure I.
2, Connect the required gain resistor to the gain pins as shown in figure 1, This resistor sets
the full-scale input range of the transmitter. See “Selecting the Gain Resistor” on the
next page for more information
3, Select the desired channel by the proper pin combination as shown in table l, Use figure
1 for a reference Grounding the pin inputs a 0. Leaving it unconnected inputs a l.
4. Connect power to the power input pins as shown in figure It Polarity does not matter.
Maximum input voltage is 20 volts DC
When powered up the unit will transmit the sensor information to the receiver on the same
channel, For proper operation the antenna must be kept away from the transmitter. To obtain
maximum range, place the antenna far from other metal objects and insure that it is fully
extended,
Sensor Inputs Battery Connection
l +Excitation 12 Input#l \
2 +Signal 13 Input #2 i
3 -Signal
4 Excitation
5 Gain resistor m
6 Gain resistor
7 Shield
‘BATTERY
ANYENNA
Channel Selection
8 Ground
9 C80
Mail"
P 0an 2917
Lake Orion, MI 4K36l -(J290
www.sendev.com
Shipping:
1050 wt Silver Bell Rd.
Orion. Ml 48359
lOCSI
ll CS2
Fig. 1 — Transmitter Connections
Table 1 - Channel Selections
Selecting the Gain Resistor
Select the gain resistor using the following equation;
Rg = (250xfull scale output in mV/V) /(.88 — (1005 xfull scale output in mV/V))
Example;
For a 2mV/V full-scale sensor output, using the equation above, we have..,
Rg = (250x 2mV/V)/(.88— (.005x2mV/V)) = 500/(.88 - 01) = 500/87 = 575 ohms:
Choose the standard resistor value closest to the calculated va uer Do not go under the calculated
value by more than 2%, as this will cause the transmitter to overrange with a full-scale load on
the sensorr Choose good quality, low temperature drift resistors See table 2 for a list of
standard I% resistors to use for gain and the corresponding input ranges
Resistor r—Full Scale Resistor I— Full Scale
(ohms) Influt (mV/V) __ (ohms) lnmlt (mV/V)
174 .6 698 2,4
226 '— .s 750 2.6
287 110 806 2.8
340 1,2 866 3.0
402 _| 14 —']_ 931 L— 3.2
l_ 464 1,6 976 3.4
523 I— 1.8 _|_ 1050 I 3.6
576 20 1100 3,8
I: 634 _ 2.2 ,_ 1150 4.0
Maul: Shippmg'
P.04Box 200 1050 W. Silver Bell Rd.
Lake Orimit Ml 4X31iI-11290 Orion. MI 48359
www.sendev.com
Table 2 — Input Ranges from Gain Resistors
FCC NOTICE
This device complies with Part 15 of the FCC rulesi Operation is subject to the following two
conditions:
I, This device may not cause harmful interference
2, This device must accept any interference received, including interference that may
cause undesired operation.
This device has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part IS of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation, This device generates, uses, and can
radiate radio frequency energy and, if installed and used in accordance with the instruction, may
cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in the particular installation If this device does cause harmful
interference to radio or television reception, the user is encouraged to try to correct the
interference by one or more of the following measures:
1, Reorient or relocate the receiving antenna
2. Increase the separation between the computer and receiver,
3, Connect the computer into an outlet on a circuit different from that to which the
receiver is connected
4, Consult the dealer or an experienced radio/TV technician for help.
Caution Any changes or modifications not expressly approved by the grantee of this device
could void the user's authority to operate the equipment.
Specifications
General
Sensor input ..........
Sensor input range
Gain ................
.Full Bridge Strain Gage
.+/-r2mV/V to +/- IOmV/V
. table with external resistor
Excitation . ,,+SVDC
Resolution ‘ (11 bits plus sign)
Accuracy ., .. 05% of Full Scale
Sample rate 1250 samples/second
Low pass filter cutoff iiiii 300HZ
Power supply input ..... 6 » 20VDC
Power supply current (w/o sensor) xxxx mA
Mail. Shipping:
Form 290 1050 w Sllvcr Bell Rd.
Lake Orion MI “30141290 0mm MI 43359
www,sendev,c0m
Temgerature
Operation .....
Sensor input an
W0— 70 deg C
.01% per deg C
Recommended Battery
TypeA ............................................................................. 9VDC alkaline
Approxnmule buttery llfe (350 ohm sensor) xx hrs4
Mail Shipping
P OBox 290 mu w. Silver Bell Rd.
Lake Orion. M14836I~UZ90 Orion. MI 43359
Wwwvsendcvrom

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