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STAND ALONE / BENCH TOP
AMPLIFIER / CONDITIONER MODULE
TMO-2 AND TMO-2A LOAD CELL SIGNAL CONDITIONER
The TMO-2 and TM0-2A Transducer Modules are complete
differential amplifier/signal conditioners with self
contained power.
Both units provide excitation, balance and span adjustment via precision
10 turn pots, and
shunt calibration necessary to couple a user supplied
bridge type transducer to an indicating instrument. Full
scale output
is specified at plus or minus 10 VDC for TM0-2, and 4-20 mA for TM0-2A.
The TMO-2 provides a
floating shunt calibration circuit which applies
calibration at the transducer, thereby eliminating errors due to
line
losses. The excitation supply incorporates a Wagner Ground to greatly
improve Common Mode Rejection.
The factory set band-width of the module
is narrow to improve stability for applications such as weighing scales.
The removal of a single capacitor will increase the frequency response
DC to 10K Hz for dynamic data applications.
SPECIFICATIONS
SIGNAL
CONDITIONER
Type:
Full external bridge
Sensor Resistance:
120 to 1000 ohm
Balance Range (350
OHM):
3% of bridge resistance
Shunt Calibration:
Single point momentary
Calibration Value:
1 mV/V resistor provided
BRIDGE AMPLIFIER
Type:
Bipolar differential
Gain Range:
67 to 737
Input Sensitivity:
1 mV/V to 10 mV/V
Input Impedance:
10 Megohm minimum
Output Voltage:
0 to 10 Volts (2 mV/V
specs)
Output Current:
0 to 10 mA
Output Impedance:
75 ohm
CMR:
110 db minimum, DC to
60 Hz
Noise and Ripple:
Less than 3 mVP-P
Nonlinearity:
.01% maximum
Accuracy:
± .05% of FS
FILTER
Type:
Low pass, 6 db, octave
Frequency:
16 Hz standard (160 and
1600 Hz available)
EXCITATION
SUPPLY
Type:
Constant voltage
Output:
8 VDC ± .25V
Output Current:
0 to 120 mA
Current Limit:
Factory set at 65 mA
Load Regulation:
.1% maximum for 100%
load change
GENERAL
Balance Stability:
.2% for 8 hours
Gain Stability:
.01% for 8 hours
Tempco:
.02% full scale/°C
Isolation:
1000 Megohm, output to AC
Operating Temp:
0 to 50°C
Size:
3 x 3.75 x 6.25 inches
Weight:
Less than 2 lbs. approx.
Fuse:
250 mA internal
Power:
115 VAC 10% 60 Hz 3
Watts
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