COND SGA-A & SGA-D Manuel_EN Rev3.doc
Page 2 on 20
Rev: 03/08/2006
1.
INTRODUCTION
The COND SGA is a Strain Gauge Amplifier, converting a strain gauge input (±10V, ± 5V, 0-2.5-5V, 0-5-10V,
0-20 mA ou 4 -20 mA) to a Voltage or current output – otherwise known as a Signal conditioner.
The COND SGA provides a wide range of signal conditioning for Strain gauges, Load cells and Torque
transducers.
Figure 1.1.
Offered in two versions, the COND SGA-A for 110/230V AC or 18-24V DC operation and the COND SGA-D
which is DC powered only. Transducer SENSITIVITY of between 0.1 mV/V and 30 mV/V are possible. This is
achieved by a combination of gain (span) DIP switches and associated fine adjustment by a potentiometer.
Similarly transducer zero OFFSET and SCALE DEAD BAND of up to 79% can be compensated for in the
module. This is achieved again by a combination of zero DIP switches and associated fine adjustment by a
potentiometer. The module has built-in FILTERS to cancel the field effects of vibration, agitation and
electrically noisy environment. The on-board low pass filter can be switched in and adjusted (from 1Hz to
5kHz) using a series of DIP switches. A wide range of proportional output options for currents and voltages
can be configured by DIP switch settings. Both the AC and DC versions are based on a common board and
are mounted in an IP65 (NEMA 4X) ABS case.
2.
INSTALLING THE COND SGA/A & COND SGA/D
2.1.
Pre Installation
See Specification details in Chapter 8 for details of Environmental Approvals. Carefully remove the COND
SGA/A unit from its packing. Check that the unit is complete and undamaged.
The COND SGA/A & COND SGA/D units can operated in any industrial environment providing the following
limits are not exceeded:
Operating
Temperature
-10 ºC to +50 ºC
Humidity
95%
non
condensing
Storage
temperature
-10 ºC to +50 ºC
While the unit is sealed to IP65 (NEMA 4X) it is advisable to follow the following installation practice where
possible :
-
Minimize vibration
-
Do not mount next to strong electrical fields (transformers, power cables)
-
Ensure easy access to interior of the module
-
Install electrical protection device, as the unit is not internally fused
