Impulse SCM7B37 - Manual (Page 2)

SCM7B
Visit our website www.dataforth.com 79
Isolated Process Control Signal Conditioning Products
SCM7B
Specifications
Input
Signal Range Thermocouple (1)
(See Ordering Information)
Bias Current -30nA
Resistance
Normal 50M Ω
Power Off 30k Ω min
Overload 30k Ω min
Protection
Continuous 120Vrms max
Transient ANSI/IEEE C37.90.1
Output
Signal Range (2) †
Effective Available Power (2) 40mW
Resistance <1 Ω
Protection Continuous Short-to-Ground
Voltage/Current Limit ±12V, ±14mA
CMV (Input-to-Output)
Continuous 1500Vrms
Transient ANSI/IEEE C37.90.1
CMRR (50 or 60Hz) 160dB
Accuracy (3) ±0.03% Span typical,
±0.1% Span max
Nonlinearity (4) See Ordering Information
Stability (-40°C to +85°C)
Gain ±35ppm/°C
Input Offset ±0.5µV/°C
Zero Suppression ±0.005%(V
z
) (5) /°C
Output Offset ±0.002% Span/°C
Noise
Peak at 5MHz B/W 500µV
RMS at 10Hz to 100kHz B/W 250µV
Peak at 0.1Hz to 10Hz B/W 1µV RTI
CJC Accuracy (6) , ±0.25°C typ, ±1°C max
+5°C to +45°C ambient
Open Input Response Upscale
Open Input Detection Time <10s
Frequency and Time Response
Bandwidth, -3dB 3Hz
NMR (50/60Hz) 80/85dB
Step Response, 90% Span 165ms
Supply Voltage 14 to 35VDC
Current (2) 12mA
Sensitivity ±0.0001%/%V
S
Mechanical Dimensions 2.13" x 1.705" x 0.605" max
(h)(w)(d) 54.1mm x 43.3mm x 15.4mm max
Environmental
Operating Temperature Range -40°C to +85°C
ATEX Group II, Category 3 -20°C to +40°C
Storage Temperature Range -40°C to +85°C
Relative Humidity 0 to 95% noncondensing
Emissions EN61000-6-4 ISM, Group 1
Radiated, Conducted Class A
Immunity EN61000-6-2 ISM, Group 1
RF Performance A ±0.5% Span Error
ESD, EFT, Surge, Voltage Dips Performance B
Module SCM7B37
Typical at 25°C and +24VDC
NOTES:
(1) Thermocouple characteristics per NIST monograph 175, ITS-90.
(2) Output Range and Supply Current specifications are based on minimum output load resistance.
Minimum output load resistance is calculated by V
OUT
2 /P
E
, where P
E
is the output Effective Available
Power that guarantees output range, accuracy, and linearity specifications.
(3) Accuracy includes the effects of repeatability, hysteresis, and linearity.
(4) Nonlinearity is calculated using the best-fit straight line method.
(5) V
Z
is the nominal input voltage that results in a 0V output.
(6) The CJC sensor accuracy should be added to the module accuracy and thermocouple accuracy to
compute the overall measurement accuracy.
‡ Thermocouple Alloy Combinations
Type Material
J Iron vs. Copper-Nickel
K Nickel-Chromium vs. Nickel-Aluminum
T Copper vs. Copper-Nickel
E Nickel-Chromium vs. Copper-Nickel
R Platinum-13% Rhodium vs. Platinum
S Platinum-10% Rhodium vs. Platinum
B Platinum-30% Rhodium vs. Platinum-6% Rhodium
Standards: DIN IEC 584, ANSI MC96-1-82, JIS C 1602-1981
Output Range Part No. Suffix Example
+1 to +5V NONE SCM7B37J-01
0 to +5V A SCM7B37J-01A
0 to +10V D SCM7B37J-01D
Ordering Information
Model ‡ Input Range
Accuracy (3)
Typical
SCM7B37J-01 100°C to +760°C ±0.03% ±0.1% ±0.01% ±0.02%
(-148°F to +1400°F) (0.26°C) (0.86°C) (0.09°C) (0.17°C)
SCM7B37J-10 0°C to +200°C ±0.03% ±0.1% ±0.01% ±0.02%
(+32°F to +392°F) (0.06°C) (0.20°C) (0.02°C) (0.04°C)
SCM7B37J-11 0°C to +400°C ±0.03% ±0.1% ±0.01% ±0.02%
(+32°F to +752°F) (0.12°C) (0.40°C) (0.04°C) (0.08°C)
SCM7B37J-12 0°C to +600°C ±0.03% ±0.1% ±0.01% ±0.02%
(+32°F to +1112°F) (0.18°C) (0.60°C) (0.06°C) (0.12°C)
SCM7B37J-13 300°C to +600°C ±0.03% ±0.1% ±0.01% ±0.02%
(572°F to +1112°F) (0.09°C) (0.30°C) (0.03°C) (0.24°C)
SCM7B37K-02 -100°C to +1350°C ±0.03% ±0.1% ±0.01% ±0.02%
(-148°F to +2462°F) (0.44°C) (1.45°C) (0.15°C) (0.29°C)
SCM7B37K-20 0°C to +300°C ±0.03% ±0.1% ±0.01% ±0.02%
(+32°F to +572°F) (0.09°C) (0.30°C) (0.03°C) (0.06°C)
SCM7B37K-21 0°C to +600°C ±0.03% ±0.1% ±0.01% ±0.02%
(+32°F to +1112°F) (0.18°C) (0.60°C) (0.06°C) (0.12°C)
SCM7B37K-22 0°C to +1200°C ±0.03% ±0.1% ±0.01% ±0.02%
(32°F to +2192°F) (0.36°C) (1.20°C) (0.12°C) (0.24°C)
SCM7B37K-23 600°C to +1200°C ±0.03% ±0.1% ±0.01% ±0.02%
(+1112°F to +2192°F) (0.18°C) (0.60°C) (0.06°C) (0.12°C)
SCM7B37T-03 -100°C to +400°C ±0.03% ±0.1% ±0.01% ±0.02%
(-148°F to +752°F) (0.15°C) (0.50°C) (0.05°C) (0.10°C)
SCM7B37E-04 0°C to +900°C ±0.03% ±0.1% ±0.01% ±0.02%
(+32°F to +1652°F) (0.27°C) (0.90°C) (0.09°C) (0.18°C)
SCM7B37R-05 0°C to +1750°C ±0.03% ±0.1% ±0.01% ±0.02%
(+32°F to +3182°F) (0.53°C) (1.75°C) (0.18°C) (0.35°C)
SCM7B37S-06 0°C to +1750°C ±0.03% ±0.1% ±0.01% ±0.02%
(+32°F to +3182°F) (0.53°C) (1.75°C) (0.18°C) (0.35°C)
SCM7B37B-07 0°C to +1800°C ±0.03% ±0.1% ±0.01% ±0.02%
(+32°F to +3272°F) (0.54°C) (1.80°C) (0.18°C) (0.36°C)
Nonlinearity (4)
Typical Max Max
† †† † † Output Ranges Available