The Honeywell GM Digital Display/Signal Conditioner is a precision instrument that conditions, amplifies, and displays sensor signals in industrial measurement applications. Two models serve distinct input types: the GM processes unamplified mV/V signals from bridge-based transducers, while the GM-A accepts amplified outputs (0-5 Vdc or 4-20 mA) from internally-amplified transducers and transmitters. Both deliver high-resolution digital readout with optional analog outputs for system integration.
Technical Specifications
Display & Resolution:
• 4½ digit LED display, 0.56 inch (14.2 mm) character height
• Maximum resolution: 1/20,000
• Conversion rate: 3 samples per second
• Accuracy: ±0.03%
• Polarity indication and flashing overrange display standard
Input Signals:
• Model GM: 0.5 mV/V to 5 mV/V or 5 mV/V to 50 mV/V input ranges
• Model GM-A: 0-5 Vdc or 4-20 mA input ranges
• GM-A gain range: 1 to 6; offset capability: ±40%
• Amplifier output impedance: < 2 ohm
• Shunt calibration (R-cal) provided for stimulus-independent setup
Output & Power:
• Optional analog output: ±5 Vdc or 4 mA to 20 mA
• High-speed analog output available to 27 kHz
• Standard power: 115 VAC @ 5 W
• Optional: 12 VDC or 220 VAC
• GM-A transducer excitation: ±15 Vdc at up to 30 mA
Mechanical & Environmental:
• 1/8 DIN case (standard); Noryl plastic construction
• Bench, rack, or panel mount; weight: 1 kg [2.25 lb]
• Operating temperature: 0 °C to 54 °C [32 °F to 130 °F]
• Storage temperature: -29 °C to 93 °C [-20 °F to 200 °F]
• Removable screw-terminal connectors
– Key Features
• Zero and span potentiometer-based scaling with jumper-selectable decimal point
• Peak/hold and track/hold modes available
• Dual-limit alarm option
• Selectable analog output filters: 10 Hz, 30 Hz, 1 kHz, or 27 kHz
• Custom front panel and NEMA enclosure options
– Typical Applications
Strain-gage and bridge-based load cells, pressure transducers, and force measurement systems. Integration with amplified transmitters in 4-20 mA or 0-5 Vdc control loops.
– Compatibility & Integration
Model GM pairs with unamplified transducers requiring signal gain and conditioning. Model GM-A directly interfaces amplified transmitters and smart transducers. Removable connectors enable field configuration without panel rewiring.
