Temperature Measurements - VTI Instruments Metek EX1202 User Manual

VTI Instruments Corp.
Connecting a frequency signal via the EX1200 DMM bus requires a making connections similar
to those used for voltage measurements.
T
T M
EMPERATURE EASUREMENTS
EX1200's internal DMM can make temperature measurements by connecting sensors to its inputs.
By doing so, it can be used as a high-channel count data logger. Three categories of sensors are
supported: thermocouples, RTDs (resistance temperature devices), and thermistors. Table 4-10
indicates each category and the types of sensors supported by the EX1200 DMM.
Category
Thermocouple
RTD
Thermistor
NOTE Temperature measurement values are returned in degrees Celsius (°C) and cannot be configured
for Fahrenheit (°F) or Kelvin (K).
Configuring Temperature Measurements
Temperature measurements require the following information to be properly configured.
Input
As with other measurement functions, the DMM's input can be routed from the external front
panel or via the internal DMM bus. If the thermocouples are being connected to switch cards with
DMM access, then internal input mode should be selected.
92
DMM Backplane
EX1200 Mainframe
4-9: F M
ABLE REQUENCY EASUREMENT
Built-in Sensor Support
B, E, J, K, N, R, S, T
PT100, D100, F100, PT385, PT3916
2.2 kΩ, 5 kΩ, 10 kΩ
T 4-10: S
ABLE
CH 1
CH 2
CH n
EX1200
Multiplexer Cards
C
ONNECTIONS VIA
Custom Sensor Support
Cannot be defined at the instrument level.
R (reference temperature)
0
α (or "A")
β (or "B")
δ (or "delta")
A, B, C (curve fitting constants)
T
UPPORTED EMPERATURE
Frequency Sources
EX1200 DMM B
US
S
ENSORS
Basic EX1200 DMM Operation