Applications of the reference thermometer
- Reference thermometer for measuring very accurate temperature in a range of -196 … +660 °C (-321 … +1,220 °F)
- Reference thermometer and a precision instrument for testing, adjusting and calibrating temperature measuring instruments in factories and calibration laboratories
- Comparative calibration in dry well calibrators, tube furnaces and liquid baths
Special features of the reference thermometer
- Temperature range: -196 … +660 °C (-321 … +1,220 °F)
- High stability
- Low drift, long service life
- Bare wires, DIN connector or SMART plug
Description of the reference thermometer
The refererence thermometer CTP5000 provides a full range platinum resistance thermometers (PRTs) for use in every application from standards calibration to site temperature measurement. If the ‘off the shelf’ range will not suit the needs the thermometers can be supplied custom manufactured to almost any specification. WIKA also provide a range of standards resistors for use when calibrating platinum resistance thermometers.
Using calibrated probes with a precise thermometer there is a choice between storing the calibration data into the memory of the instrument or if using ASL SMART probes for ease of convenience, the calibration is stored in an electronic memory chip located in the connector of the reference thermometer. Therefore moving the SMART probe between channels or instruments is easy as the calibration data is stored in the SMART-probe connector, no need to enter the calibration data into the instrument channel now being used.
For calibration, the test items and the standard reference thermometer are brought to the same temperature in a temperature conditioning unit.
As soon as a stable temperature is reached, the test items are read or their output signals are measured (resistance, thermoelectric voltage, standard signal) and compared with the standard thermometer.
Using this comparison method, the measuring uncertainty can be considerably reduced because not only the display of the temperature conditioning unit is taken into consideration.
Universal controller for panel mounting – CS6S, CS6H, CS6L – WIKA Middle East <!--
- Plant and industrial furnace construction
- Process engineering
- Plastics technology and processing
- Ventilation and air-conditioning
- General industrial applications
- Control modes, configurable (PID, PI, P, PD, ON/OFF)
- Integrated auto-tuning
- Selectable monitoring output – relay, logic level or 4 … 20 mA
- Multi-function input for Pt100, thermocouples and standard industrial signals
- Available in 3 case sizes
The compact universal controllers of the CS6x series offer display, control and monitoring of temperatures.
The controllers feature a multi-function input, meaning the configuration of the sensor input can be set. Thus the flexibility of the controller is considerably increased, and warehousing is made easier. An alarm output for monitoring the actual value is also available as standard.
The control parameters can be set across broad ranges. Auto-tuning, which facilitates finding the optimal control parameters, can be activated.
The monitoring output can be set either as relay (for slow control), as logic level for the control of electronic solid state relays (for fast control and high current loads) or as a continuous 4 … 20 mA output.
As options, there is a 2nd alarm output available for the monitoring of the actual value and the control loop, and a heater burnout alarm for monitoring the monitoring output, or, alternatively, a 2nd monitoring output. An RS-485 serial interface is also possible.
Applications of the temperature transmitter
- Process industry
- Machine building and plant construction
Special features of the temperature transmitter
- For the connection of Pt100 and Pt1000 sensors in a 2-, 3- or 4-wire connection
- For the connection of reed chains in a potentiometer circuit
- Parameterisation with the WIKAsoft-TT configuration software and electrical connection via quick connector magWIK
- Connection terminals also accessible from the outside
- Accuracy < 0.2 K / 0.1 %
Description of the temperature transmitter
These temperature transmitters are designed for universal use in plant and machine building, and also in the process industry. They offer high accuracy and excellent protection against electromagnetic influences (EMI). Via the WIKAsoft-TT configuration software and the model PU-448 programming unit, the model T15 temperature transmitters can be parameterised very easily, quickly and with a clear overview.
Besides the selection of the sensor type and the measuring range, the software enables the error signaling operation, damping and several measuring point descriptions to be stored. Furthermore, the WIKAsoft-TT software offers a line recording functionality where the temperature profile for the sensor connected to the temperature transmitter T15 can be displayed.
The temperature transmitter model T15 also has diverse supervisory functionality, such as the monitoring of the sensor wire resistance and sensor-break detection in accordance with NAMUR NE89 as well as monitoring of the measuring range. Moreover, these temperature transmitters have comprehensive cyclic self-monitoring functionality.
- For direct installation into the process
- Machine building
- Pipelines and vessels
- Application ranges from -200 … +600 °C (-328 … +1,112 °F)
- For insertion, screw-in with optional process connection
- Connection head form B or JS
- Explosion-protected version
Resistance thermometers without thermowell are particularly suitable for those applications in which the metal sensor tip is mounted directly into bored holes (e.g. in machine components) or directly into the process for any application with no chemically aggressive media or abrasion.
For mounting into a thermowell, a spring-loaded compression fitting should be provided, since only this can press the sensor tip into the bottom of the thermowell. Otherwise a potentially critical force could be exerted on the measuring tip. Mounting is usually made directly into the process. Fastening elements such as threaded fittings, union nuts, etc. are available as options.
The flexible part of the sensor is a mineral-insulated cable (sheathed cable). It consists of a stainless steel outer sheath in which the internal lead is pressed and isolated within a high-density ceramic mass. The measuring resistance is connected directly to the internal leads of the sheathed cable and is, therefore, also suitable for use at higher temperatures.
Due to their flexibility and the small possible diameters, sheathed resistance thermometers can also be used in locations that are not easily accessible, since, with the exception of the sensor tip and the transition of the connection cable, the sheath can be bent to a radius of three times the diameter of the cable.
The flexibility of the sheathed resistance thermometer must be considered, especially when the flow rates are relatively high.
Optionally we can fit analogue or digital transmitters from the WIKA range into the connection head.
- Plant construction
- Process engineering
- General industrial applications
- Oil and gas
- Setting of units and measuring range possible on site (only model TIF52)
- Different hazardous area approvals
- The following settings are possible via external software:
– Duplex sensor, redundant measurement possible
– Customer-specific characteristic curves programmable
The TIF series field temperature transmitters, consisting of a rugged field housing, model T32 temperature transmitter and a model DIH display, have been designed for general use in process engineering.
They offer high accuracy, galvanic isolation and excellent protection against electromagnetic influences (EMI). Via HART® protocol, the TIFxx is configurable (interoperable) with a variety of open configuration tools.
In addition to the different sensor types, e.g. sensors in accordance with DIN EN 60751, JIS C1606, DIN 43760, IEC 60584 or DIN 43710, customer-specific sensor characteristics can also be defined, through the input of value pairs (user-defined linearisation).
Through the configuration of a sensor with redundancy (dual sensor), on a sensor failure it will automatically change over to the working sensor.
Furthermore there is the possibility to activate Sensor Drift Detection. With this, an error signal occurs when the magnitude of the temperature difference between Sensor 1 and Sensor 2 exceeds a user-selectable value.
The field temperature transmitter also has additional sophisticated supervisory functionality such as monitoring of the sensor wire resistance and sensor-break detection in accordance with NAMUR NE89 as well as monitoring of the measuring range. Moreover, this transmitter has comprehensive cyclic self-monitoring functionality.
Via the display it is possible to show range alarms as well as MIN and MAX values.
The field temperature transmitter is available in various field-housing variants. Plastic, stainless steel and aluminium can be specified. It can be mounted directly on a wall. A pipe mounting kit is also available for fitting to pipes with a diameter of 1… 2″.
The field temperature transmitters are delivered with a basic configuration or configured according to customer specifications.
- Oil and gas industry
- Maintenance and service facilities
- Calibration service companies and service industry
- Simple calibrations directly on site
- Pressure samples
- Measuring ranges up to 0 … 1,000 bar (0 … 15,000 psi), vacuum and absolute pressure ranges also available
- Accuracy: up to 0.05 % (incl. calibration certificate)
- Intrinsically safe version
- Logger function with up to 50 measured values per second
- Communication with WIKA-Cal software over WIKA-Wireless
The model CPG1500 precision digital pressure gauge takes the concept of an analogue gauge, and raises it to a level only matched by digital calibrators. The accuracy of digital measurement technology and the simplicity of an analogue gauge are combined together to create the digital pressure gauge CPG1500, which in terms of performance, ease-of-use, and instrument features, is unmatched in the pressure measurement market.
The CPG1500 offers an accuracy of 0.1 % of span (optional 0.05 % of span) and is temperature-compensated in the range of -10 … +50 °C (14 … 122 °F). Readings can be displayed in one of 26 pressure and 5 level units or also in customer-specific units, so that intricate conversions are avoided.
The measuring rate can be user-defined to match the type of measurement required. Standard applications usually use three measured values per second. If required, this rate can also be set to 50 measured values per second. Via an energy-saving function, the CPG1500 switches automatically into “sleep” mode, in this mode the battery life can be increased up to 2,500 hours.
Through the new and innovative menu navigation, simple operation is ensured. The clear display, with integral bar graph display and large text area, assists with the effective analysis of the widest variety of measuring points. With the MIN/MAX function, the highest and lowest pressures can be accessed immediately and saved automatically.
- Medium and high-voltage instruments
- Monitoring of the density of SF6 gas in closed tanks
- Raising an alarm when defined limit values have been reached
- Case and wetted parts from stainless steel
- On-site display with switch contact
- Temperature-compensated and hermetically sealed, therefore no influence of temperature fluctuations, differences in level and atmospheric pressure fluctuations
- Compensation for gas mixtures possible
- Traceability by serial number
Gas density is a crucial operating parameter for high-voltage equipment. If the required gas density is not present, safe operation of the plant cannot be guaranteed.
The WIKA gas density measuring instruments provide reliable warnings against dangerously low gas levels, even in extreme environmental conditions. Electrical switch contacts warn the plant operator when the gas density drops below defined levels due to leakage.
Numerous fields of application
The WIKA gas density monitor is hermetically sealed and temperature-compensated. Measured value fluctuations and erroneous alarms caused by changes in either ambient temperature or air pressure are therefore prevented.
Via the on-site display, the system pressure based on 20 °C can be read directly on the instrument. With the integrated switch contacts, simple switching tasks can be realised quickly and without complication.
- Gas density monitoring of closed SF6 tanks
- For outdoor use
- For high voltage switchgear
- Density switch with reference chamber and gas compensation.
- Micro switch inside the reference chamber; without influence of atmospheric pressure change and altitude; no recalibration necessary
Permissible filling pressure:
11.0 barabs. / 20 °C
Maximum pressure of reference chamber:
7.5 barabs. / 20 °C
Minimum pressure of reference chamber:
4.0 barabs. / 20 °C
Permissible temperature ranges
Ambient: -40 … +80 °C (gas phase)
Storage: -40 … +80 °C
Alarm contacts / Contact rating
Up to four micro switches, to make or break as ordered, switching points non adjustable and secured
Contact rating: 5 A / 250 V AC, 50 Hz
Maximum switching point distance: 1.6 bar
Minimum switching point distance: 0.1 bar
Switching hysteresis: typical 0.1 bar , Switching point setting as per specification
Switching accuracy of reference contact
at 20 °C: 60 mbar
at -20 … +60 °C: 80 mbar
2 kV, 50 Hz, 1s (wiring versus case)
Cable box with cable gland M20 x 1.5
Connection cross-section max. 2.5 mm²