User Manual

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19.2 Analog Inputs
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1
9.2.4 8939 STRAIN UNIT
Number of channels 2 channels
Appropriate adapter Strain gauge adapter, Bridge resistance: 120 Ω to 1 kΩ
Bridge voltage 2±0.05 Ｖ
Balancing Electronic auto-balancing
Balance adjustment range ±10000με max
Measurement ranges 20, 50, 100, 200, 500, 1000με/DIV
DC amplitude accuracy ±（0.5%f.s.＋2με）
Zero position setting range -50 to 150% of the recording width (in full-size representation of the
measurement range)
Zero position accuracy ±0.5%f.s.
Temperature characteristic ・Gain: ±0.05%f.s./℃
・Zero position: ±2 με/℃（20,50με/DIV）
±0.1%f.s./℃（other ranges）
Frequency characteristic
DC to 20 kHz
＋1
−3
dB
Low-pass filter OFF, 10, 30, 300, 3k ±30%（Hz）-3 dB
A/D resolution 12 bits
Maximum sampling speed 1 MS/s (sampling period: 1μs)
Maximum input voltage 10 V (DC + AC peak)
Maximum rated voltage to
earth
30 V rms or 60 V DC
Operational ranges for
temperature and humidity
Same as the MEMORY HiCORDER in which the 8939 is installed
Operating place Same as the MEMORY HiCORDER in which the 8939 is installed
Temperature and humidity
ranges for storage
Temperature: -10℃ to 50℃ (14
｡
F to 122
｡
F)
Relative humidity: 80%RH max (with no condensation)
Dimensions Approx. 170 W×20 H×148.5 D mm (6.69" W× 0.79" H×5.832" D mm)
Mass Approx. 250 g (8.8 oz)
Effect of radiated
radio-frequency
electromagnetic field
±5% f.s. at 3 V/m
Dielectric strength Between 8939 and main unit, between 8939 and input unit: 400 V AC fo
r
a minute
Accessories Conversion cable×2 (Compatible sensor connector: PRC03-12A10-7M10.5
by TAJIMI)
Standard Applying EMC
Safety
EN 61326, ClassA
EN 61010
Pollution Degree 2, measurement category
(anticipated transient overvoltage 330 V)
Accuracy at 23℃±5℃, 35% to 85%RH after auto-balancing,
after 60-minutes warming-up time. Accuracy guaranteed for 1 year