Page 1
Specifications
18200-40
Cole-Parmer Instrument Company
625 East Bunker Court
Vernon Hills, Illinois 60061-1844
(847) 549-7600
(847) 247-2929 (Fax)
800-323-4340
www.coleparmer.com
e-mail: techinfo@coleparmer.com
Document Revision 1.0, August, 2008
© Copyright 2008 Measurement Computing Corporation, TCR1-2
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Specifications
Parameter
Conditions
Specification
A/D converters
Four dual 24-bit, Sigma-Delta type
Number of channels
8 differential
Input isolation
500 VDC minimum between field wiring and
USB interface
Channel configuration
Thermocouple sensor type
Differential input voltage
range
Thermocouple
±0.080 V
Absolute maximum input
voltage
±C0x through ±C7x relative to
GND (pins 9,19,28,38)
±25 V power on, ±40 V power off.
Input impedance
5 Gigohm, min.
Input leakage current
Open thermocouple detect enabled
105 nA max.
Normal mode rejection ratio
f
IN
= 60 Hz
90 dB min.
Common mode rejection
ratio
f
IN
= 50 Hz/60 Hz
100 dB min.
Resolution
24 bits
No missing codes
24 bits
Input coupling
DC
Warm-up time
30 minutes min.
Open thermocouple detect
Automatically enabled when the channel pair
is configured for thermocouple sensors.
The maximum open detection time is 3
seconds.
CJC sensor accuracy
15 °C to 35 °C
±0.25 °C typ.,
±0.5 °C max.
0 °C to 70 °C
-1.0 to +0.5 °C max
Sensor Category
Conditions
Specification
Thermocouple
J, K, S, R, B, E, T, or N
8 differential channels
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog input section
Table 1. Generic analog input specifications
Channel configurations
Note 1: Channel configuration information is stored in the EEPROM of the isolated microcontroller by
the firmware whenever any item is modified. Modification is performed by commands issued
over USB from an external application, and the configuration is made non-volatile through the
use of the EEPROM.
Note 2: The factory default configuration is Type J.
Table 2. Channel configuration specifications
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Specifications 18200-40
Sensor Type
Maximum error
Typical error
Temperature range
J
±1.499 °C
±0.507 °C
-210 to 0 °C
±0.643 °C
±0.312 °C
0 to 1200 °C
K
±1.761 °C
±0.538 °C
-210 to 0 °C
±0.691 °C
±0.345 °C
0 to 1372 °C
S
±2.491°C
±0.648 °C
-50 to 250 °C
±1.841 °C
±0.399 °C
250 to 1768.1 °C
R
±2.653 °C
±0.650 °C
-50 to 250 °C
±1.070 °C
±0.358 °C
250 to 1768.1 °C
B
±1.779 °C
±0.581 °C
250 to 700 °C
±0.912 °C
±0.369 °C
700 to 1820 °C
E
±1.471 °C
±0.462 °C
-200 to 0 °C
±0.639 °C
±0.245 °C
0 to 1000 °C
T
±1.717 °C
±0.514 °C
-200 to 0 °C
±0.713 °C
±0.256 °C
0 to 600 °C
N
±1.969 °C
±0.502 °C
-200 to 0 °C
±0.769 °C
±0.272 °C
0 to 1300 °C
Number of input channels
Maximum throughput
1
2 Samples/second
2
2 S/s on each channel, 4 S/s total
3
2 S/s on each channel, 6 S/s total
4
2 S/s on each channel, 8 S/s total
5
2 S/s on each channel, 10 S/s total
6
2 S/s on each channel, 12 S/s total
7
2 S/s on each channel, 14 S/s total
8
2 S/s on each channel, 16 S/s total
Accuracy
Thermocouple measurement accuracy
Table 3. Thermocouple accuracy specifications, including CJC measurement error
Note 3: Thermocouple specifications include linearization, cold-junction compensation and system noise.
These specs are for one year, or 3000 operating hours, whichever comes first and for operation of
the 18200-40 between 15 °C and 35 °C. For measurements outside this range, add ±0.5 degree to
the maximum error shown. There are CJC sensors on each side of the module. The accuracy
listed above assumes the screw terminals are at the same temperature as the CJC sensor. Errors
shown do not include inherent thermocouple error. Please contact your thermocouple supplier for
details on the actual thermocouple error.
Note 4: Thermocouples must be connected to the 18200-40 such that they are floating with respect to
GND (pins 9, 19, 28, 38). The 18200-40 GND pins are isolated from earth ground, so connecting
thermocouple sensors to voltages referenced to earth ground is permissible as long as the
isolation between the GND pins and earth ground is maintained.
Note 5: When thermocouples are attached to conductive surfaces, the voltage differential between
multiple thermocouples must remain within ±1.4V. For best results we recommend the use of
ungrounded or insulated thermocouples when possible.
Throughput rate
Table 4. Throughput rate specifications
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Specifications 18200-40
Digital type
CMOS
Number of I/O
8 (DIO0 through DIO7)
Configuration
Independently configured for input or output.
Power on reset is input mode.
Pull up/pull-down configuration
All pins pulled up to +5 V via 47 K resistors (default). Pull down to
ground (GND) also available.
Digital I/O transfer rate (software paced)
Digital input – 50 port reads or single bit reads per second typ.
Digital output – 100 port writes or single bit writes per second typ.
Input high voltage
2.0 V min., 5.5 V absolute max.
Input low voltage
0.8 V max., -0.5 V absolute min.
Output low voltage (IOL = 2.5 mA)
0.7 V max
Output high voltage
(IOH = -2.5 mA)
3.8 V min.
EEPROM
1,024 bytes isolated micro reserved for sensor configuration
256 bytes USB micro for external application use
Type
Two high performance 8-bit RISC microcontrollers
Parameter
Conditions
Specification
USB +5V (VBUS) input voltage range
4.75 V min. to 5.25 V max.
Note 6: The analog inputs are configured to run continuously. Each channel is sampled twice per second.
The maximum latency between when a sample is acquired and the temperature data is provided
by the USB unit is approximately 0.5 seconds.
Digital input/output
Table 5. Digital input/output specifications
Note 7: All ground pins on the 18200-40 (pins 9, 19, 28, 38) are isolated from earth ground. If a
connection is made to earth ground when using digital I/O and conductive thermocouples, the
thermocouples are no longer isolated. In this case, thermocouples must not be connected to any
conductive surfaces that may be referenced to earth ground.
Memory
Microcontroller
USB +5V voltage
Table 6. Memory specifications
Table 7. Microcontroller specifications
Table 8. USB +5V voltage specifications
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Specifications 18200-40
Parameter
Conditions
Specification
Supply current
USB enumeration
<100 mA
Supply current
(Note 8)
Continuous mode
70 mA max.
User +5V output voltage range
(terminal block pin 21 and 47)
Connected to self-powered hub. (Note 9)
4.75 V min. to
5.25 V max.
User +5V output current
(terminal block pin 21 and pin 47)
Bus-powered and connected to a self-powered hub. (Note 9)
10 mA max.
Isolation
Measurement system to PC
500 VDC min.
USB device type
USB 2.0 (full-speed)
Device compatibility
USB 1.1, USB 2.0
Self-powered, 100 mA consumption max
USB cable type
A-B cable, UL type AWM 2527 or equivalent. (min 24 AWG VBUS/GND,
min 28 AWG D+/D-)
USB cable length
3 meters max.
Operating temperature range
0 to 70 ° C
Storage temperature range
-40 to 85 ° C
Humidity
0 to 90% non-condensing
Dimensions
127 mm (L) x 88.9 mm (W) x 35.56 (H)
User connection length
3 meters max.
Power
Table 9. Power specifications
Note 8: This is the total current requirement for the 18200-40 which includes up to 10 mA for the status
LED.
Note 9: Self-Powered Hub refers to a USB hub with an external power supply. Self-powered hubs allow
a connected USB device to draw up to 500 mA.
Root Port Hubs reside in the PC’s USB Host Controller. The USB port(s) on your PC are root
port hubs. All externally powered root port hubs (desktop PC’s) provide up to 500 mA of current
for a USB device. Battery-powered root port hubs provide 100 mA or 500 mA, depending upon
the manufacturer. A laptop PC that is not connected to an external power adapter is an example
of a battery-powered root port hub.
USB specifications
Environmental
Mechanical
Table 10. USB specifications
Table 11. Environmental specifications
Table 12. Mechanical specifications
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Specifications 18200-40
Connector type
Screw terminal
Wire gauge range
16 AWG to 30 AWG
Pin
Signal Name
Pin Description
Pin
Signal Name
Pin Description
1
RSVD
Reserved, Do Not Use
27
RSVD
Reserved, Do Not Use
2
NC 28
GND
3
C0H
CH0 sensor input (+)
29
C7L
CH7 sensor input (-)
4
C0L
CH0 sensor input (-)
30
C7H
CH7 sensor input (+)
5
NC 31
RSVD
Reserved, Do Not Use
6
RSVD
Reserved, Do Not Use
32
NC
7
C1H
CH1 sensor input (+)
33
C6L
CH6 sensor input (-)
8
C1L
CH1 sensor input (-)
34
C6H
CH6 sensor input (+)
9
GND 35
NC
10
RSVD
Reserved, Do Not Use
36
RSVD
Reserved, Do Not Use
CJC sensor
CJC sensor
11
RSVD
Reserved, Do Not Use
37
RSVD
Reserved, Do Not Use
12
NC 38
GND
13
C2H
CH2 sensor input (+)
39
C5L
CH5 sensor input (-)
14
C2L
CH2 sensor input (-)
40
C5H
CH5 sensor input (+)
15
NC 41
RSVD
Reserved, Do Not Use
16
RSVD
Reserved, Do Not Use
42
NC
17
C3H
CH3 sensor input (+)
43
C4L
CH4 sensor input (-)
18
C3L
CH3 sensor input (-)
44
C4H
CH4 sensor input (+)
19
GND 45
NC
20
RSVD
Reserved, Do Not Use
46
RSVD
Reserved, Do Not Use
21
+5V
+5V output
47
+5V
+5V output
22
GND 48
GND
23
DIO0
Digital Input/Output
49
DIO7
Digital Input/Output
24
DIO1
Digital Input/Output
50
DIO6
Digital Input/Output
25
DIO2
Digital Input/Output
51
DIO5
Digital Input/Output
26
DIO3
Digital Input/Output
52
DIO4
Digital Input/Output
Screw terminal connector type and pin out
Table 13. Screw terminal connector specifications
Screw terminal pin out
Table 14. Screw terminal pin out
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18200-40-spec.doc
Cole-Parmer Instrument Company
625 East Bunker Court
Vernon Hills, Illinois 60061-1844
(847) 549-7600
Fax: (847) 247-2929
800-323-4340
www.coleparmer.com
E-mail: techinfo@coleparmer.com
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