|
 The
Model 4010 Thermocouple Conditioner/Indicator/
Controller accepts up to four independent
temperature signals from Types E, J, K, R, S, T, and B thermocouples (see Specifications).
Any desired mixture of these TC types is permitted. Sensors
may be grounded or ungrounded.
An
amplifier-per-channel design with chopper stabilization and active
low-pass filtering allows high-speed scan switching of high-level,
stabilized signals, at exceptionally low cost per channel.
As
a signal processor, the 4010 can compute, display, and evaluate real-time
temperature differences, averages, and gradients (see, for example,
its use in Oven Temperature Profile
Measurement). It can also capture and hold temperature
maximum and minimum values.
As
a temperature controller with eight independently programmable TTL-level
logic I/O, the 4010 is ideal for multi-temperature profile operations (engine
exhausts, autoclave or oven zones), or
for thermostatic applications in environmental energy management.
See also the use of the 4010 in temperature-corrected Mass
Flow Measurement.
Since
the rear conditioner connector provides a precision thermistor for
reference-junction compensation, no external cold junction is required—although
the user may supply his or her own controlled ambient temperature zone for
reference-junction purposes, if desired. For an optional remote-site
temperature-compensated junction, see the Model
10CTJB-8 Thermocouple Junction Box.
In
the event of a broken thermocouple wire or other "open TC"
condition, the 4010 will automatically report an indeterminate off-scale
reading, either positive or negative.
The
4010 uses "absolute" calibration, which means that no
calibration is required by the user, once the proper "TC Type"
and desired engineering units (°C or °F) are entered. During
operation, appropriate reference-junction compensation, real-time digital
linearization, and unit scaling are automatically applied for each type of
thermocouple used.
A
second, two-point "zero and span" calibration technique is
provided, however, for applications where it is desirable to force
multiple TC readings to the same exactly known temperature (in heat
balance applications, for example, it is useful to be able to zero
all readings simultaneously).
|
Functions
Provided by the
MODEL 4010
"STANDARD
CONFIGURATION" (for
a complete listing of the configuration, click
here) |
 |
An
individual front-panel button allows each temperature reading
to be called to display, as well as the continuous "live"
average value of all four temperature readings |
|
A
fifth input channel is dedicated to the "live" temperature
reading of the isothermal reference-junction within the analog input
connector |
|
When
any temperature reading—including cold-junction temperature—leaves
the predefined "safety zone" for that channel, a specific
nonlatching logic output will be triggered |
|
The
4010's ±10 VDC analog output derives from the
"live" temperature average, and is initially scaled for 1
mV of output per 1 degree of temperature (°C or
°F) |
|
Thermocouple
Instrument Specifications [Top 
]
(Click
here for
4000 Series General
Specifications; see also
the statement
on Daytronic accuracy specifications)
|
|
Number
of Inputs |
Up
to four |
|
Input
Type |
Types
E, J, K, R, S, T, and B thermocouples, grounded or ungrounded, in any
desired mix; built-in reference-junction compensation (see also the
optional Model 10CTJB-8 Thermocouple Junction Box) |
|
Input
Ranges and Resolutions |
|
TC
Type
|
Range |
Display
Resolution
|
Typical
Accuracy*
|
Maximum
Error*
|
| E |
-130°
C to +1000° C |
0.1°
C |
±0.6°
C |
±0.8°
C |
| E |
-200°
F to +1800° F |
0.2°
F |
±1.0°
F |
±1.4°
F |
| J |
-130°
C to +750° C |
0.1°
C |
±0.8°
C |
±1.3°
C |
| J |
-200°
F to +1400° F |
0.2°
F |
±1.4°
F |
±2.2°
F |
| K |
-75°
C to +1350° C |
0.1°
C |
±1.1°
C |
±1.5°
C |
| K |
-100°
F to +2500° F |
0.2°
F |
±1.8°
F |
±2.6°
F |
| R |
-20°
C to +1750° C |
0.1°
C |
±1.3°
C |
±2.6°
C |
| R |
0°
F to +3200° F |
0.2°
F |
±2.2°
F |
±4.6°
F |
| S |
-20°
C to +1750° C |
0.1°
C |
±1.3°
C |
±2.6°
C |
| S |
0°
F to +3200° F |
0.2°
F |
±2.2°
F |
±4.6°
F |
| T |
-130°
C to +400° C |
0.1°
C |
±0.7°
C |
±1.1°
C |
| T |
-200°
F to +750° F |
0.2°
F |
±1.2°
F |
±1.8°
F |
| B |
+480°
C to +1820° C |
0.1°
C |
±1.3°
C |
±2.6°
C |
| B |
+900°
F to +3300° F |
0.2°
F |
±2.2°
F |
±4.6°
F |
|
*
Including ± one count of least significant digit displayed. Can
be readily improved by control of instrument temperature,
calibrating at known temperatures, etc. |
|
|
TC
Break Detection |
Off-scale
positive or negative |
|
Linearization |
Digital
look-up table, ±0.05° C |
|
Normal-Mode
Range |
±80
mV operating; ±5 V without instrument damage |
|
Common-Mode
Range |
±40
V operating; ±50 V without instrument damage |
|
Common-Mode
Rejection Ratio |
-116
dB at DC; -120 dB at 60 Hz |
|
Input
Impedance |
Differential:
10 MΩ
Common-Mode: 0.5 MΩ |
|
Offset |
Initial:
±0.005 mV
Vs. Temperature: ±0.0001 mV/°C
Vs. Time: ±0.001 mV/month
|
|
Gain
Accuracy |
±0.05%
of absolute mV input range of -10 to 80 mV; for Typical System Accuracy,
see table, above |
|
Gain
Stability |
Vs.
Temperature: ±50 ppm/°C
Vs. Time: ±20 ppm/month
|
|
Analog
Filtering |
|
Filter |
2-pole
modified Butterworth; -3 dB at 1 Hz; -60 dB at 50 Hz |
|
Step
Response Settling Time (Full-Scale Output) |
To
1% of final value: 1.0 sec
To 0.1% of final value: 5 sec
To 0.02% of final value: 10 sec
|
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