DPM-951A – Strain Amplifier
- Built-in HPF cancels the effect of temperature drift
- Digital switch makes it easily to confirm the setting values even power off.
- High voltage output of ?10 V and high SN ratio
The DPM-950 Series is a Dynamic Strain Amplifier. The carrier-wave amplifier features strong against invert noise.
Carrier Wave Frequencies 5 kHz
Frequency Response DC to 2 kHz (Deviation ?10%)
SN Ratio 58 dBp-p or more
Measuring Targets Strain gage, strain-gage transducers
Applicable Bridge Resistance 60 to 1000 ?
Gage Factor 2.00 fixed
Bridge Excitation 2 Vrms, 0.5 Vrms, switchable
Balance Adjustment Resistance: Within ?2% (?10k ?10-6 strain)
Capacitance: Within 2000 pF
Balance Adjustment Method Resistance: Auto balance
Accuracy: Within ?0.5 ?10-6 strain
Storage: Saved in nonvolatile memory
Capacitance: CST method (Capacitance self-tracking)
Nonlinearity Within ?0.1% FS
Output Impedance Approx. 2 ?
Calibration Strain (CAL) ?(1 to 9999?10-6 strain)
Setting: CAL switch (4-digital switch)
Accuracy: Within ?(0.5% + 0.5 ?10-6 strain)
Sensitivity Adjustment Sensitivity is set in combination with CAL and
VOLTAGE OUT switches (4-digit digital switches)
CAL switch range: 100 to 9999 ?10-6 strain by
1 ?10-6 strain step
VOLTAGE OUT switch range: 1.00 to 10.00 by 0.01 V step
Accuracy: Within ?0.5%
Range: x200 to x20000
Fine Sensitivity Adjustment Range: 1 to 1/2.5
LPF Transfer characteristic : 2nd Order Butterworth
Cutoff frequencies : 10, 30, 100, 300Hz, 1k Hz and FLAT – 6 steps
Amplitude ratio at cutoff point : -3?1 dB
Attenuation : (-12?1) dB/oct (Except set to 1 kHz)
HPF Cutoff frequencies : 0.2 Hz, OFF- 2 steps
Output OUTPUT A: ?10 V (Load resistance 5 k? or more)
OUTPUT B: ?10 V (Load resistance 5 k? or more)
Zero point: ?0.1 ?10-6 strain per ?C
Zero point: ?0.5 ?10-6 strain per 24h
Zero point: ?0.05%FS/power fluctuation ?10%
Sensitivity: ?0.05%/power fluctuation ?10%
Withstand Voltage 1 k VAC for 1 min between measuring bridge and case
1 k VAC for 1 min between AC power supply and case
Output Voltage Indication 4 1/2 digit digital display (7-segment LED)11-segment LED bar meter
Over Input Indication Output voltage display flashing (4 1/2 digit digital display only)
Check Functions Bridge check
Key Lock Function Locks all keys other than POWER switch.
(Allows settings on digital CAL and VOLTAGE OUT switches to be changed)
Remote Functions Balance adjustment execute (BAL), calibration strain output execute (CAL), key lock
TEDS Reads the sensor TEDS information, and sets the rated output to the VOLTAGE OUT output voltage.
Actual Load Calibration Sets actual load input to the VOLTAGE OUT output voltage.
Operating Temperature -10 to 50?C
Operating Humidity 20 to 85%RH (Non-condensing)
Power Supply 100 VAC, approx. 12 VA
115, 200, 230 VAC, or 10.5 to 15 VDC
(approx. 0.6 A at 12 VDC) also available.
Weight Approx. 1.2 kg
Others The following product is able to be used with the DPM-951A.
Inductance-type Displacement Transducer DLT-AS/BS
Standard Accessories Output cable U-08 , U-59, 1 each
AC power cable P-25 (With 2-pin conversion plug CM-39)
Fuse (Midget type 0.5 A, 1 A)
Simple manual sticker
Optional Accessories Extension cables N-81 to N-85
Bridge boxes DB, DBB, and DBS
Housing case YC-A
Noise filter F-7B, F-BNC
Amplifier stand FA