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2–6 Thermocouple Input Wiring
The thermocouple input connections are shown in figure 2.5. The correct type of
thermocouple extension lead-wire or compensating cable must be used for the entire
distance between the controller and the thermocouple, ensuring that the correct
polarity is maintained throughout. Joints in the cable should be avoided, if possible.
If the length of the thermocouple plus the extension wire is too long, it may affect
the temperature measurement. A 400 ohms K type or a 500 ohms J type thermocou-
ple lead resistance will produce approximately 1°C temperature error .
The color codes used on the thermocouple extension leads are shown in table 2.1.
2–4 Power Wiring
The controller is supplied to operate at 11–26VAC/VDC or
90–264VAC. Check that the installation voltage corresponds to
the power rating indicated on the product label before connect-
ing power to the controller .
2–5 Sensor Installation Guidelines
Proper sensor installation can eliminate many problems in a
control system. The probe should be placed so that it can detect
any temperature change with minimal thermal lag. In a process
that requires fairly constant heat output, the probe should be
placed close to the heater. In a process where the heat demand is
variable, the probe should be close to the work area. Some exper-
iments with probe location are often required to find the opti-
mum position.
In a liquid process, the addition of a stirrer will help elimi-
nate thermal lag. Since a thermocouple is basically a point
measuring device, placing more than one thermocouple in par-
allel can provide an average temperature readout and produce
better results in most air-heated processes.
The proper sensor type is also a very important factor in
obtaining precise measurements. The sensor must have the
correct temperature range to meet the process requirements. In
special processes, the sensor might have additional require-
ments such as leak-proof, anti-vibration, antiseptic, etc.
Standard sensor limits of error are ±4°F (±2°C) or 0.75% of
sensed temperature (half that for special) plus drift caused by
improper protection or an over-temperature occurrence. This
error is far greater than controller error and cannot be correct-
ed on the sensor except by proper selection and replacement .
This equipment is
designed for installation
in an enclosure which provides
adequate protection against
electrical shock. The enclosure
must be connected to earth
ground.
Local requirements regard-
ing electrical installation
should be rigidly observed.
Consideration should be given
to prevent unauthorized per-
sonnel from gaining access to
the power terminals.
Thermocouple Cable British American German French
Type Material BS ASTM DIN NFE
Copper (Cu)
+ white + blue + red + yellow
T
Constantan (Cu-Ni)
– blue – red – brown – blue
* blue * blue * brown * blue
Iron (Fe)
+ yellow + white + red + yellow
J
Constantan (Cu-Ni)
– blue – red – blue – black
* black * black * blue * black
Nickel-Chromium
+ brown + yellow + red + yellow
K (Ni-Cr)
– blue – red – green – purple
Nickel-Aluminum
* red * yellow * green * yellow
(Ni-Al)
R Pt-13%Rh, Pt
+ white + black + red + yellow
S Pt-10%Rh, Pt
– blue – red – white – green
* green * green * white * green
Pt-30%Rh
Use + grey + red Use
B
Pt-6%Rh
Copper – red – grey Copper
Wire * grey * grey Wire
Table 2.1 Thermocouple Cable Color Codes
* Color of overall sheath
- Instruction Manual 1
- TEC-9300 1
- Self-Tune Fuzzy / PID Process 1
- Temperature Controller 1
- Chapter 1 Overview 5
- Related Products 6
- 1–2 Ordering Code 6
- Figure 1. Access Hole 7
- Overview 7
- Table 1.1 DIP Switch 7
- Configuration 7
- 1–4 Keys and Displays 8
- 1–6 System Modes 11
- 1–7 Parameter Description 12
- Chapter 2 Installation 19
- 2–6 Thermocouple Input Wiring 20
- 2–4 Power Wiring 20
- 2–7 RTD Input Wiring 21
- 2–8 Linear DC Input Wiring 21
- 2–10 Event Input wiring 23
- 2–11 Output 1 Wiring 24
- 2–12 Output 2 Wiring 25
- Figure 2.19 RS-232 Wiring 28
- 3–1 Input 1 29
- 3–2 OUT1 and OUT2 Types 30
- 3–3 Configuring User Menu 30
- 3–4 Heat Only Control 30
- 3–5 Cool Only Control 31
- 3–6 Heat-Cool Control 32
- 3–7 Dwell Timer 33
- 3–8 Process Alarms 34
- 3–9 Deviation Alarm 35
- 3–10 Deviation Band Alarm 36
- 3–11 Heater Break Alarm 37
- 3–12 Loop Break Alarm 37
- 3–13 Sensor Break Alarm 38
- 3–14 SP1 Range 38
- 3–15 PV1 Shift 38
- 3–16 Failure Transfer 39
- 3–17 Bumpless Transfer 40
- 3–18 Self tuning 40
- Self-tune Menu 40
- 3–19 Auto tuning 41
- 3–20 Manual Tuning 42
- 3–21 Signal Conditioner 43
- DC Power Supply 43
- 3–22 Manual Control 43
- 3–23 Display Mode 44
- 3–25 Reload Default Values 44
- 4–1 Event Input 45
- 4–2 Second Set Point 45
- 4–3 Second PID Set 46
- 4–4 Ramp and Dwell 46
- 4–5 Remote Set Point 47
- 4–6 Differential Control 47
- 4–7 Output Power Limits 48
- 4–8 Data Communication 48
- 4–9 Analog Retransmission 49
- 4–10 Digital Filter 49
- 4–11 Sleep Mode 49
- 4–12 Pump Control 50
- 4–13 Remote Lockout 50
- Chapter 5 Applications 51
- 5–3 Heat Only Control 52
- 5–5 Heat-Cool Control 53
- 5–4 Cool Only Control 53
- 5–6 Ramp and Dwell 54
- 5–7 Remote Set 55
- 5–8 Differential Control 55
- 5–9 Dual Set Point/PID 56
- 5–10 RS-485 57
- 5–11 RS-232 58
- 5–12 Retransmit 58
- Chapter 6 Calibration 59
- Troubleshooting procedures: 61
- Chapter 8 Specifications 65
- PID: Fuzzy logic modified 66
- 9-1 Functions Supported 67
- 9-2 Exception Responses 68
- 9-3 Parameter Table 69
- P= 100.0 80
- 9-3 Communication Examples 80
- A–1 Menu Existence Conditions 81
- A–2 Factory Menu Description 84
- A–3 Glossary 85
- A–4 Memo 89
- A–5 Warranty 91
- TEMPCO’s Visionary Solutions 92
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