Model 3770
DC STRAIN GAGE PANEL METER
3
Controls
Analog Control Settings
Front panel controls configure the Signal conditioner section for excitation level, mode of the analog output
signal, low pass filter characteristics and shunt calibration being internal or external.
1 – 5 Vdc Output -
UP sets the analog output FS to 5 Vdc, DOWN is 10 Vdc
2 – 4 - 20 mA -
UP sets the analog current output for 4-20 mA , DOWN is 4-12-20ma
3 – 20/200 Hz -
UP selects 20 Hz filter. DOWN selects 200 Hz filter
4 – 20/2 Hz -
UP selects 20 Hz filter. DOWN selects 2 Hz filter
5 – SHUNT Internal / External -
UP selects the Internal Shunt Resistor – 59K, DOWN is External
6 – Excitation -
UP selects 10 Vdc excitation to the sensor, DOWN selects 5 Vdc
7 – Not Used
With all switches in the UP position, the unit will have the following settings:
•
10 Vdc Excitation voltage
•
The full scale analog output will be 5.000 Vdc
•
The current output will be set for 4 ma = zero and 20 ma will = positive full scale
•
The analog low pass filter will be set for 20 Hz
•
Shunt calibration resistor will be set for the internal 59K Ohm resistor value
Note:
The Excitation (switch 6) placement is used to select the mV/V input range of the unit. 5 Vdc setting
will accept sensors from 5.0 to 10 mV/V. 10 Vdc setting will accept .5 to 5.0 mV/V sensors.
Analog Control Settings for Conditioner Configuration
1 - VDC OUT
2 - mA OUT
3 - FILTER
4 - FILTER
5 - SHUNT
6 - EXC
7 - N/A
5
4-20
20 Hz
20 Hz
INT
10
10
4-12-20
200 Hz
2 Hz
EXT
5
Down
Function
Analog Control Settings (red switch array)
The selection of the 7 front panel analog control
settings will configure the signal conditioning
section of the meter. The position of the switches
will depend on the type of sensor, its parameters
and the expected analog output signal levels
along with the output signal’s 3db roll-off
response characteristics.
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