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DC amplifier


Product outline

AM32AZ is a general-purpose DC amplifier with a built-in bridge excitation supply for strain gauge sensors. It exhibits power performance for broadband operation (DC -100kHz) achieving high gain (Max. gain: 10000 times), but it has an extremely low drift. Therefore, data precision with every measurement or experiment markedly improves. In addition, AM32AZ has excellent user-friendliness. It is equipped with a calibration function by digital switch which allows easy calibration of either value of voltage or strain amount.


Compatible input resistance 60Ω to 2kΩ
Excitation power supply Voltage: 2.5, 5, 10, 15, 20V DC ±0.2%, Current: max 50mA
Equilibrium adjustment range ±1.5mV/V (excitation voltage 10V)
Input voltage range 0 to ±100mV
Input resistance 10MΩ or more (direct-coupled equilibrium differential)
Voltage amplification Max. 10000 times
Gain adjustment ・ Coarse adjustment: 0, 1/20, 1/10, 1/5, 1/2, 1/1…Error±0.2%
・ Fine adjustment: 1 to 1/6 of each range variable
Zero drift Within ±0.5μV/°C (after a lapse of 30 min. after power ON)
Gain drift Within ±50 ppm/°C of measured value (after a lapse of 30 min. after power ON)
Noise Within 30μVp-p RTI (full band)
Within 2.5μVp-p RTI (1 kHz band)
Within 0.5μVp-p RTI (10 kHz band)
Non-linearity Within ±0.01% FS
Output voltage ・ Voltage output: 0 to ±10V ±5mA, Output resistance: 0.2Ω (BNC connector output)
・ Voltage output: 0 to ±10V ±30mA, Output resistance: 300Ω (binding post output)
Response characteristic DC – 100kHz/ -3dB
High-pass filter (AC mode) 0.5Hz(-3dB) ±15%, -6dB/OCT.
Low-pass filter 1, 10, 100, 1k, 10 kHz (-3dB) ±15% and PASS-12dB/oct, Bessel type
Calibration value Strain calibration: ±1 to 9999 x 10-6 strain, Voltage calibration: ±1 to 9999μV, Setting method: 4-digit digital switch, Accuracy: ±0.2%±0.5x10-6 strain (strain calibration), ±0.5%±5μV (voltage calibration) superimposed on input signal
External control Electronic auto zero function
・ Auto zero range: ±1V (±10V, ±5V, ±2V Please specify when ordering.)
・ Auto zero command: ON and OFF, panel face switch and external signal (negative pulse with a pulse width of 50ms or more)
Operating conditions ・ Working temperature range: 0 to +50°C
・ Humidity: 85% RH or less (non-condensing)
Power supply voltage 100V AC ±10%, 50/60 Hz
Power consumption Approx. 10VA
Dimensions 49.5(W)×138(H)×310(D) mm (panel thickness included, but dimensions of protruding parts not included)
Weight Approx. 1.9kg
Attachments ・ AC input cord (1)
・ Spare fuse (0.5A) (1)
・ CA8 (BNC-alligator clip cable 1.5 m) (1)
・ Operation manual (1)

Optional accessories

CA3Y31 (6-core) input cable with PRC connector (3m)
CA451 (6-core) input cable with PRC connector at both ends (5m)
CA7 Coaxial cable with BNC
CA8 Cable with Alligator clip at one end


Product catalogue(PDF)
AM32AZ Product catalogue Download
Operation manual(PDF)
External dimention
Support tools
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