Technical Specifications
The following tables summarise the technical parameters for the various input modules which can be supplied for use with the NetPod instrumentation. The specifications shown for the strain gauge interfaces are worst case and supplied units should operate above the results displayed in the table
Specifications
High Resolution
24 Bit Card
24 Bit Card
CMMR
160 dB
Sample Rate
0.1 - 2 KHz
Isolation
1500V RMS
Dynamic Range
150 dB
Signal/Noise
Ratio Average:
Ratio Average:
See Note 1
Gain Accuracy
(Accuracy as % reading)
(Accuracy as % reading)
0.1 % or better
Settling Time
2 ms
Input Range: V1
± 5.0 V
V2
V3
V4
± 50 V
± 500 V
± 300mV
± 500 V
± 300mV
Resolution: V1
V2
V3
V4
0.6 mV
6.0 mV
60.0 mV
35.7 nV
6.0 mV
60.0 mV
35.7 nV
Input Offset: V1
V2
V3
± 1 mV/°C
±10 mV/°C
±100 mV/°C
±10 mV/°C
±100 mV/°C
Stability: V1
V2
V3
10 ppm/°C
10 ppm/°C
10 ppm/°C
10 ppm/°C
10 ppm/°C
Input V1
Impedance V2
Impedance V2
V3
V4
2 MW
2 MW
20 MW
20 MW
2 MW
20 MW
20 MW
Current Input
± 80 mA, 0-20 mA
0-60 mA, 4-20 mA
User Defined
0-
User Defined
Overload
250 V RMS
Converter Type
Sigma Delta
Gain
(Software Selectable)
(Software Selectable)
1,2,4,8,16 note 2
Lineraity
(accuracy as % of range)
(accuracy as % of range)
0.0015 %
Note 2
The pre-amp gain settings on all of the analogue input modules are sample rate limited.
Note 3
The maximum input range can be changed to suit
The maximum input range can be changed to suit
Note 1 (range V1)
Table 1
Strain Gauge & Load Cell Specifications
Specification
H igh Resolution
24 Bit Card
24 Bit Card
Linearity
0.02%
Range
±20,000 me
Bridge Balance
50% FS - Software compensation
Resolution
0.05 me
Input Noise
1 mV RMS
Bridge Type
'/4, 1/2 and Full bridge
Gauge Factor
0 - 10
Input Impeadence
1 GW
Excitation
2.5 or 12V V or by Const Current Excitation
Output Noise
5 mV RMS
Digital Interface Specifications
Interface
Specification
Isolated Digital Input
No. Channels/Board:
16
Low Level (0):
0-1 V, 0-2 V
High Level (1):
4-30 V, 6-300 V
Switch Rate:
1 KHz, 10 Hz
TTL Digital Output (*x)
No.Channels/Board
16
Low Level (0):
0V
High Level (1):
5V
Switch Rate:
1 KHz
Drive Current
20 mA/Channel
Thermocouple
Sensor Accuracy / Deg C
Fe-Con (J)
Class 1 -40 to + 750
Class 1 -40 to + 750
Class 1 -
±1.5
± 2.5
± 2.5
Cu-Con (T)
Class 1 -40 to + 750
Class 2 -40 to + 750
Class 3 -200 to + 40
Class 2 -
Class 3 -
±0.5
± 1.0
± 2.5
± 1.0
± 2.5
BiCr-Ni (K)
Class 1 -40 to + 1000
Class 1 -40 to + 1200
Class 1 -
±1.5
± 2.5
± 2.5
NrCrSi-NiSi (N)
Class 3 -200 to + 40
± 2.5
NiCr-Con (E)
Class 1 -40 to + 800
Class 2 -40 to + 900
Class 3 -200 to + 40
Class 2 -
Class 3 -
±0.5
± 2.5
± 2.5
± 2.5
± 2.5
Pt10Rh-Pt (S)
Class 1 0 to + 1600
Class 1 -40 to + 1600
Class 1 -
±1.0
± 1.5
± 1.5
Pt6Rh (B)
Class 2 600 to 1700
Class 3 -200 to + 40
Class 3 -
± 2.5
± 2.5
± 2.5