Amplifies the signal from a bridge
type pressure transducer
Gain: Optimized
for standard 5 uv/v/mmHg transducers. Range: 200-700, 10 turn vernier helipot
adjust. Adjustment range includes 10 mv/mmHg and 10 mv/cmH20 scale factors.
Bandwidth: Break
frequency 160 Hz, 330 Hz, -6 db (50% voltage). Bandwidths to
35 kHz available on request.
Input:
Differential: 1000 ohms in series (protective)
with each input, 1 Megohm to analog ground on each input. Full surge and
static protection, 40 vdc maximum sustained.
Common mode rejection: 120 db
Noise: 1.5 uv referred to input (Inputs
shorted, gain set to 550, 330 Hz BW).
Drift: Less than 1 mv or
0.1 mmHg/cmH2O per 24 hr drift (inputs shorted), 0.1 mmHg/ deg C ambient (due to transducer).
Inputs: Bridge type transducer signal
inputs on pins 2 and 3 of a 6 pin modular telephone jack.
Balance:
Autobalance: initiated by momentary
switch depression.
Range: bipolar
-3.5 to 3.5 vdc. At a gain giving 10 mv/mmHg : -350 to +350 mmHg.
Offset adjustment:10 turn vernier offset
adjustment for adapting to recorders or A/D converters
Connector: Signal out (pin 3), analog
ground (pin 2), power interconnect (pin 5), and power ground (pin 4) via
a 6 pin modular telephone receptacle. Contacts gold flashed, rated at 1.5
Amps, extremely reliable, locking.
Excitation: Excitation voltage provided
by a precision +/- 2.35 vdc power supply with a current capability of 20
ma on pins 4 and 5 of the transducer input modular telephone connector
(50 ppm/deg C ).
Power:
A barrel type receptacle is provided for a
7.5 to 9 vdc unregulated wall transformer.
