Model 3770
DC STRAIN GAGE PANEL METER
3770 SPECIFICATIONS
Measurement Range:
Adjustable; 0.5 to 10 mV/V; nominal full-scale. Dependent on Excitation level selected
Transducer Types:
Conventional 4-arm strain gage bridges, 120 to 10 k ohm
Excitation
: Selectable: 5.0 or 10.0 Vdc, with remote sense lines. Up to 70 mA.
Physical Parameters
: 5.68” W x 2.84” H x 7.06” D; weight 3.25 Lbs.
Analog Output:
selectable; ± 5, ± 10 Vdc, 4-20mA or 4-12-20mA
(20% over-range on voltage outputs only)
Operating Temperature:
0 to +
55
Degrees C, 5 to 95% relative humidity, non-condensing
Amplifier
Normal - Mode Range:
±
0.2
V RMS operating; ±
28 V without instrument damage
Common - Mode Range:
± 3 V
Input Impedance:
Differential
>10 M
Ω
Offset
: vs. Temperature: ±30 ppm µV/°C; vs. Time: ±10 ppm/month
Gain Accuracy:
Limited only by calibration accuracy
Gain Stability:
vs. Temperature: ±30 ppm/°C; vs. Time: ±10 ppm/month
Linearity
: better than ± 0.03% of full scale
Filter
: 3-pole modified Butterworth; 3 dB down at 2 Hz, 20 Hz or 200 Hz; selectable. Fast output
always enabled, 5 KHz response (J3 Pin 3).
Step-Response Settling Times for the 3770 (in milliseconds)
3db Frequency
To within 1% within .1% within .02%
Fast Output
5000 Hz
0.14
0.10
0.08
Selectable Output
200 Hz
3.7
5.0
5.6
20 Hz
37
50
56
2 Hz
370
500
560
1. a
P
ANEL
M
OUNT ING
You can easily mo unt the instrument in your o wn precut panel. Cuto ut dimensions for
a
panel-mounted
unit are standard
DIN
; panel thickness sho uld no t exceed 6 mm (0 .24
in).S i mp l y u n s c r e w t h e t wo r e a r - p a n e l C L A M P S C R E W S a n d s l i d e t h e C L A M P
SLIDES rearward s o ut o f their groo ves (THE FRONT B EZEL NEED NOT BE
REMOVED). Insert the unit through the panel cutout,
from the front of the panel
(if
t h e u n i t h a s r u b b e r f e e t , t h e s e wi l l ha v e t o b e r e mo v e d ) . T h e n r e i n s t a l l t h e
CLAMP SLIDES, and tighten the CLAMP SCREWS until the instrument is securely
mo u nted.
Page 2
P
ower
:
85 - 264 VAC @ 0.2 amps; 47 - 63 Hz
