Pressure Systems 9046 - Manual (Page 30)

Pressure Systems, Inc. Model 9046 User’s Manual
Page 24 www.PressureSystems.com
4.0 Firmware
4.1 Description of Operation
Table 1 shows the different sensor types available along with the gain settings and engineering
units for each type. Setting channel sensor type automatically causes the gain for that channel
to be set according to Table1.
Sensor Type Gain Setting
Va, Vb Engineering
Units
Volts 1, 1 Volts
Thermocouple, Types:
B, E, J, K, N, R, S, T 90, 1 Degrees C (F)
Resistance
Range 220
Ω
Range 440 Ω
Range 990 Ω
Range 19.8 k Ω
90, 90
45, 45
20, 20
1, 1 Ohms
Thermistor
2.25 k, 5 k, 10 k
1, 1 Degrees C (F)
Platinum RTD
(100
Ω at 0 °C
+ 0.385 Ω/°C)
90, 90 Degrees C (F)
MIL-T-7990B RTD 90, 90 Degrees C (F)
The two voltages for each channel are read during each pass through the data acquisition task.
Default number of averages is 64 and default thermal updates is 15 seconds. Va is the
transducer voltage. Vb is the voltage of the cold junction transducer. These voltages are used
to calculate engineering units for each channel as follows: