KYOWA DPM-911B Frequency Response: DC to 2.5 kHz Strain Amplifier

Measuring Targets

Strain gages, strain-gage transducers

Channels

1
Simultaneous operation is available by using multiple units.

Compatible Bridge Resistance

60 to 1000 Ω

Gage Factor

2.00 fixed

Bridge Excitation

2 V_rms, 0.5 V_rms, switchable

Balance Adjustment

Resistance: Within ±2% (±10000 ×10^-6 strain)
Capacity: Within 2000 pF

Balance Adjustment Method

Resistance: Auto balance
Accuracy: Within ±0.5 ×10^-6 strain
(When 500 ×10^-6 strain is input, outputs 10 V, excitation voltage: 2 V_rms)
Capacitance: CST method (Capacitance self-tracking)

Nonlinearity

Within ±0.1% FS

Output Impedance

Approx. 2 Ω

Calibration Strain (CAL)

±(1 to 9999 ×10^-6 strain)
Setting: CAL switch (4-digital switch)
Accuracy: Within ±(0.5% +0.5 ×10^-6 strain)
Applicable scope of CAL accuracy: ±(10 to 9999) ×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
(Set with CAL switches)

VOLTAGE OUT switch range: 1.00 to 10.00 by 0.01 V step

Accuracy: Within ±0.5%
　(When Bridge Excitation is 2 V_rms)

Range: ×200 to 20000

Fine Sensitivity Adjustment

Range: 1 to 1/2.5

Frequency Response

DC to 2.5 kHz
Deviation: ±10%

LPF

Transfer characteristic : 2nd order Butterworth
Cutoff frequencies : 10, 30, 100, 300 Hz, 1k Hz, and FLAT - 6 steps
Amplitude ratio at cutoff point : -3 ±1 dB
Attenuation : -12 ±1 dB/oct.

HPF

Cutoff frequencies : 0.2 Hz, OFF- 2 steps

SN Ratio

54 dB_p-p or more
RTI: Within 2 ×10^-6 strain_p-p, when 500 ×10^-6 strain is input, outputs 10.00 V.

60 dB_p-p or more
When 1000 ×10^-6 strain is input, outputs 10.00 V.

[Common Condition]
　Bridge Excitation: 2 V_rms
　Bridge Resistance: 120 Ω
　LPF = FLAT

Output

OUTPUT A : ±10 V (Load resistance 5 kΩ or more)
OUTPUT B : ±10 V (Load resistance 5 kΩ or more)

Stability

Temperature
Zero point: Within ±0.1 ×10^-6 strain per °C
Sensitivity: Within ±0.05%/ºC

Time
Zero point: Within ±0.5 ×10^-6 strain/24 h
Sensitivity: Within ±0.3%/24 h

Power supply
Zero point: Within ±0.05% FS/power fluctuation ±10%
Sensitivity: Within ±0.05%/power fluctuation ±10%

Stability condition: When 500 ×10^-6 strain is input, outputs 10.00 V.

Withstand Voltage

1000 VAC for 1 minute between measuring bridge and case
1000 VAC for 1 minute between AC power supply and case

Output Voltage Indication

4½ digit digital display (7-segment LED)
11-segment LED bar meter

Over Input Indication

Output voltage display flashing
(4½ digit digital display only)

Check Functions

Bridge check

Key Lock Functions

Locks all keys other than POWER switch.
(Allows settings on CAL and VOLTAGE OUT switches to be changed.)

Remote Functions

Capable of controlling the following functions.
　Balance adjustment execute (BAL)
　Calibration strain output execute (CAL)
　Key lock

Synchronization Method

Automatically determines internal (INT) or external (EXT) and manual setting.

TEDS

Reads the sensor TEDS information, and sets the rated output to the VOLTAGE OUT output voltage.
(Condition: Within the setting range of the sensitivity adjuster)

Actual Load Calibration

Sets actual load input to the VOLTAGE OUT output voltage.
(Condition: Within the setting range of the sensitivity adjuster)

Vibration Resistant

5 to 200 Hz, with 29.4 m/s² (3 G)
in X, Y and Z directions for 12 cycles, 10 min/cycle

Impact Resistant

15 G, 11 ms or less,
in X, Y and Z directions, every 3 cycles

Operating Temperature

-10 to 50°C

Operating Humidity

20 to 85% (Non-condensing)

Storage Temperature

-30 to 70°C

Power Supply

90 to 110 VAC (Approx. 12 VA: 100 VAC）
10.5 to 15 VDC (Approx. 0.6 A: 12 VDC）

Following models are also available.
DPM-xxxx A115: 108 to 132 VAC
DPM-xxxx A200: 180 to 220 VAC
DPM-xxxx A230: 207 to 253 VAC
xxxx: Part of model, example; 911B

Dimensions

49 W ×128.5 H ×262.5 D mm (Excluding protrusions)
Panel-cut dimensions: 50 W ×113 H mm

Weight

Approx. 1.2 kg