APD 4058 - Strain Gauge Bridge/Load Cell to DC Transmitter - Field Configurable


• DC Voltage Input: 0-5 mV to 0-1200 mV
• DC Output: 0-1 V, 0-5 V, 0-10 V, +/- 5 V, +/- 10 V, 4-20 mA, etc.
• Strain Gauge Bridge Excitation: 1 to 10 VDC
• Field-Configurable by User

The APD 4058 accepts an input from a strain gauge, bridge type sensor, load cell, or pressure transducer. It filters, amplifies, and converts the resulting millivolt signal into the selected DC voltage or current output that is linearly related to the input. The output is not electrically isolated.The adjustable excitation power supply generates a stable source of voltage to drive your sensor. Input, output, excitation and zero offset are field configurable, via external rotary and slide switches. Offsets up to ±100% of span can be used to cancel sensor offsets or non-zero dead weights (taring).


API Module Power Options
1 week
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Strain Gauge Input Ranges
Minimum range: 0 to 5 mV
Maximum range: 0 to 1200 mV
Minimum sensitivity: 0.5 mV/V
Maximum sensitivity: 120 mV/V
Millivolt output range is determined by the sensitivity of the sensor (mV/V) and the excitation voltage applied.
mV/V sensitivity X excitation voltage = total mV range

Input Impedance
1 MΩ typical

Common Mode Rejection
100 dB minimum

Calibration Resistor Options
M01 option: Switch with calibration resistor inside module. Specify resistor value.
M02 option: Switch for external (load cell) calibration resistor.

Excitation Voltage
Maximum output: 10 VDC maximum at 30 mA
Drive capability: One 100 Ω to 10,000 Ω bridge at 10 VDC
Switch selectable: 0-10 VDC in 1 V increments
Fine adjustment: ±2.5% via multiturn potentiometer
Stability: ±0.01% per °C

DC Output Ranges
                          Minimum       Maximum
Voltage:             0-1 VDC        0-10 VDC (10 mA max)
Bipolar Voltage: ±1 VDC        ±10 VDC (±10 mA max)
Current:             0-2 mADC    4-20 mADC
                          20 V compliance, 1000 Ω at 20 mA

Output Ripple and Noise
Less than 10 mVRMS ripple and noise

Better than ±0.1% of span

Ambient Temperature Range and Stability
–10°C to +60°C operating ambient
Better than ±0.02% of span per °C stability

Response Time
70 milliseconds typical (14.3 Hz)
DF option: 10 millisecond response time typical (100 Hz)
Contact factory for custom response times


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