Cooper Instruments & Systems DCM 460 Voltage Bridge Amplifier User Manual
Page 2
CF 28
2
4/2001
Specifications
(Typical @ 25°C unless noted)
Amplifier
Gain Range
40-250
Gain Temperature Coefficient
200 ppm/°C
Drift (RTI)
3 µV/°C
Input Bias Current
±30 nA
Input Impedance
Differential
Common Mode
3,000 megohms
6 megohms
Output Noise (RTO)
At gain=100
1 Hz to 2 kHz
2 mV P-P
Input Noise
Line Frequencies
15 µV P-P
Output Offset-Tare
Range
Drift
-5V to +2V
±0.2 mV/°C
Common Mode Rejection
Gain=40 (DC-60 Hz)
Gain=250 (DC-60 Hz)
90 dB
100 dB
Rated Output (2k load)
±10V
Output Impedance
DC to 2 kHz
0.01 ohms to 1 ohm
Dynamic Response
DC to –3 dB two pole
Bessel Filter
2 kHz
Common Mode Input Voltage
±6.5V
Bridge Supply
Input
115 VAC ±10% 50 to 60 Hz
(100, 220 & 230 VAC available)
Output Voltage
4 to 15 Volts
Output Current
120 mA
(see output voltage vs. current curve)
Load & Line Regulation 0.05%
VOUT=12V, IL=0 to 100 mA
Output Noise
0.5 mV RMS
Drift
200 ppm/°C max.
B+ Potentiometer Hysteresis
0.3% of output max.
Short Circuit Current
750 mA
Line Isolation
1,500 VDC
Mechanical
Operating Temperature
0°C to 70°C
Storage Temperature
-25°C to +85°C
Weight
18 oz. (510 grams)
Size
3.75”L x 2.0”W x 2.87”H
9.53 x 5.1 x 7.62 (cm)
Getting Started with the DCM 460
I. Hook Up Procedure
A.
Connect the +out of your load cell to the +INPUT, pin 8.
B.
Connect the -out of your load cell to the -INPUT, pin 9.
Note: If the ± SENSE are not used in your load cell application, the connections in step C & D need to be
followed. If the ±SENSE are going to be used, do not jumper them as described in steps C & D.
C.
Connect B+, pin 4, to the + excitation of your load cell and jumper the + SENSE, pin 3, to B+, pin 4.
D.
Connect B-, pin 2, to the -excitation of your load cell and jumper the - SENSE, pin 1, to B -, pin 2.
E.
Connect the VAC power supply to the AC input lines, pins 6 and 7.
II. Turn On Procedure
A.
Verify that the hook up procedure is complete.
B.
Verify the correct AC voltage is applied to the DCM 460; i.e. 100, 115, 220, 230.