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Summary of Contents for WIKA CTH7000
- Page 1 Operating instructions Hand-held thermometer, model CTH7000 Hand-held thermometer, model CTH7000...
- Page 2 Page 2 - 51 Further languages can be found at www.wika.com. © 2013 WIKA Alexander Wiegand SE & Co. KG All rights reserved. WIKA® is a registered trademark in various countries. Prior to starting any work, read the operating instructions!
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Page 3: Table Of Contents
Front panel ........................14 Overview ........................... 14 Keypad ..........................15 About the display screen ....................16 CTH7000 thermometer inputs .................... 16 Battery Pack ........................18 Removing and replacing the battery pack ................18 Battery charger ........................18 Charging the battery pack ................. 20 Name plate(s) ........................ - Page 4 Communications Interface ....................49 11.1 Introduction ........................49 11.2 USB Command syntax ....................49 Command terminators (CR) or (CR)(LF) ................49 Command details ....................... 50 SYSTEM:REMOTE ................... 50 SYSTEM:LOCAL ....................50 *IDN? ........................ 50 MEASURE:CHANNEL? <channel> ..............50 WIKA Operating Instruction, model CTH7000...
- Page 5 Contents UNIT:TEMP? <units> ..................51 LOG:DUMP 1 ....................51 LOG:ERASE 1 ....................51 Accessories ........................51 Declarations of conformity can be found online at www.wika.com. WIKA Operating Instruction, model CTH7000...
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Page 6: General Information
CTH7000. The operating instructions are part of the instrument and must be kept in the immediate vicinity of the hand-held thermometer model CTH7000 and readily accessible to skilled personnel at any time. -
Page 7: Design And Function
1. LCD display 2. Keypad 3. Inputs at the top 4. USB Description The CTH7000 is a precision instrument designed for laboratory, commercial and industrial temperature measurement and calibration applications. Features include: Two input channels A large graphic LCD display for excellent viewing of temperature measurement values and ... -
Page 8: Scope Of Delivery
2. Design and function or Short overview The CTH7000 will operate with all 4-wire Pt100 (100 ohm) Platinum Resistance Thermometers (PRTs) and with virtually all thermistors. Temperature measurement units are user-selectable and can display C, °F, K and . Overall system accuracy will depend on the sensor quality and calibration - see the specification section. -
Page 9: Safety
Application The model CTH7000 hand-held thermometer is a high performance 2-channel thermometer for Pt100 and thermistor probes. The hand-held thermometer CTH7000 is a step up in measurement accuracy with a battery power. The CTH7000 is designed for laboratory and industrial temperature measurement and calibration applications intended to be used in a basic electromagnetic environment. -
Page 10: Improper Use
WIKA service engineer. Handle electronic precision measuring instruments with the required care (protect from humidity, impacts, strong magnetic fields, static electricity and extreme temperatures, do not insert any objects into the instrument or its openings). -
Page 11: Responsibility Of The Operator
3. Safety Responsibility of the operator The model CTH7000 hand-held thermometer is a high performance 2-channel thermometer for Pt100 and thermistor probes. The operator is therefore responsible for legal obligations regarding safety at work. The safety instructions within these operating instructions, as well as the safety, accident prevention and environmental protection regulations for the application area must be maintained. -
Page 12: Safety Marks
This marking on the instruments indicates that they must not be disposed of in domestic waste. The disposal is carried out by return to the manufacturer or by the corresponding municipal authorities (see EU directive 2012/19/EU). WIKA Operating Instruction, model CTH7000... -
Page 13: Design And Function
For PRTs, the relationship between resistance and temperature varies slightly from one PRT to another. Therefore, no matter how accurately the CTH7000 measures the PRT resistance, if the relationship between resistance and temperature for a particular PRT is not known, accurate temperature measurement is not possible. -
Page 14: Front Panel
4. Design and Function Front panel Overview 1. LCD display 2. Keypad 3. Inputs at the top 4. USB WIKA Operating Instruction, model CTH7000... -
Page 15: Keypad
2 The Up () and Down () keys can be used to change the displayed units 3 The Clear ( ) key is also used to view CTH7000 statistics; press once to select the statistics page. Press any key to return. -
Page 16: About The Display Screen
There are two input channels; two 5 pin DIN input-sockets are located at the top of the instrument. These are designed to take either PRT or thermistor probes. Channel A is colour-coded red. Channel B is colour-coded blue. Channel A (red) Channel B (blue) WIKA Operating Instruction, model CTH7000... - Page 17 Smart probes (described in section 4.5) contain their own calibration information and communicate this to the CTH7000 as soon as they are used. Passive probes do not contain calibration information and the CTH7000 must be set-up with the calibration information for each probe used (and each time the probe is changed).
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Page 18: Battery Pack
To replace the battery pack, place the pack in position before sliding home. Check that the battery pack is securely in position before using the instrument. Battery charger Please observe the following warnings (repeated from the front of the manual). WIKA Operating Instruction, model CTH7000... - Page 19 The battery charger is provided with various interchangeable mains connectors; select the one that you require - see the charger PSU pack for details. Information Disconnect the charger when not charging the battery pack. Charge indication LED WIKA Operating Instruction, model CTH7000...
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Page 20: Charging The Battery Pack
4. Design and Function Charging the battery pack The CTH7000 battery pack may be charged during instrument use, when the instrument is off, or when the pack is detached from the CTH7000. Information Performance may degrade if the batteries are charged during use. -
Page 21: Name Plate(S)
(and conversion method); the time of day is also shown . This is the normal operating display for the CTH7000. The display will look similar to the one shown below - Smart probe serial... -
Page 22: Menu Mode ( Key)
Readings are updated at the normal conversion rate of one every two seconds. Menu Mode ( key) In menu mode, the LCD displays the various options available to control CTH7000 operation. Press the Menu key ( ) to select the menu screen. - Page 23 Pressing the Clear key ( ) will return the display to the previous menu. Press the Clear key ( ) once more to return to Measurement mode. Pressing the Enter key ( ) will return the CTH7000 immediately to Measurement Mode (generally applies to all lower level menu options).
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Page 24: Selecting The Thermometer Input Channel And Differential Mode (A/B Key)
To cancel the relative measurement mode, press the Zero ( 0 ) key again. Zero mode is cancelled when power is turned off. WIKA Operating Instruction, model CTH7000... -
Page 25: Selecting Run/Hold Mode ()
Instrument measurements stop completely when Hold mode is active. This is indicated on the bottom-left of the display where Hold mode indication alternates with the current conversion method, providing a flashing indication. Hold mode may be used when the CTH7000 is in differential mode. -
Page 26: Selecting Units
Channel A is always used for the PRT probe and channel B is always used for the Thermistor probe. 11 Alternatively, the Up () and Down () keys can be used to change the displayed units WIKA Operating Instruction, model CTH7000... - Page 27 12 This can be changed using the Settings menu; keep careful note of the new value if changed. A lost password can be retrieved, but llllllyou will need to contact WIKA directly for further information. WIKA Operating Instruction, model CTH7000...
- Page 28 Probe coefficients Both PRT and Thermistor probes must be correctly calibrated to produce their most accurate performance. The CTH7000 can store calibration data for each of the two channels; this information is only required when passive probes are being used.
- Page 29 13 This can be changed using the Settings menu; keep careful note of the new value if changed. A lost password can be retrieved, but llllllyou will need to contact WIKA directly for further information. 14 Use the Clear key repeatedly to exit without changing any of the coefficients.
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Page 30: Data Logging Menu
4. Design and Function Data logging menu The CTH7000 can log data. Logging status is always shown at the bottom right-hand of the measurement screen. Data can be logged at regular intervals (the interval is set when Setup selected), reviewed and logging can be turned on and off. - Page 31 Logging with a larger data intervals effectively increases the total period for which data can be logged. Logging will stop when the power is turned off. WIKA Operating Instruction, model CTH7000...
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Page 32: Statistics Menu
4. Design and Function Statistics menu The CTH7000 provides statistics on the data it is collecting. Press the Enter key to select the statistics sub-menu. Statistical information is calculated continuously from the moment statistics are cleared (see sub-menu). Changing any parameter that affects the calculation (e.g. units) will automatically clear and restart calculation. -
Page 33: Settings Menu
Settings System CTH7000 has been set to 50 Hz & 60 Hz reject (rejection filter) by default. Select 50 Hz or 60 Hz, depending on the operational mains frequency in your area. This can provide better noise rejection. See the menu screen shown below. - Page 34 4. Design and Function Timeouts The CTH7000 can be set to timeout after a preset period (to save battery life); by default the timeout is off. Selecting this option allows the various timeout values to be set. Use the Up and Down keys to select the required timeout and then press the Enter key to select it (or use the Clear key to return to the Measurement Menu).
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Page 35: System Menu
Settings System a) Change Passcode Selecting this option allows the CTH7000 passcode to be set to another value . The current passcode has to be entered before it can be altered. The passcode screen will always show the value ‘0000’ when it is first displayed; use the Up and Down keys to change this to the current passcode value. - Page 36 4. Design and Function b) Instrument calibration Selecting this option allows the CTH7000 to be calibrated; this option will overwrite and replace the existing calibration data. The correct equipment, environment and accurately calibrated resistors are required. For this reason, a passcode (9900) has to be entered first –...
- Page 37 Information Selecting this option will overwrite all instrument calibration data and settings. Do not attempt to do this unless you have the correct equipment, environment and suitably trained personnel. c) Diagnostics Not available for use. WIKA Operating Instruction, model CTH7000...
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Page 38: Setting Up Temperature Measurement
If a Smart probe is detected on a selected input channel, the PRT calibration data is loaded directly from the Smart probe. Smart probe data always takes precedence over the internal CTH7000 coefficient data (but does not overwrite the instrument data). -
Page 39: Smart Probe Review
4. Design and Function Smart Probe review The Smart probe data can be reviewed, but not changed on the CTH7000. The Smart probe data contains the following information – Version Smart probe data format Lock Password protection state 00 = Smart probe data locked can not be changed from the instrument... -
Page 40: Instrument Measurement Range
+850 °C C/F/K Temperature ITS90 -201°C +963 °C C/F/K 19 Because of the potentially high resistances of thermistors, it may not be possible to determine the difference between connected and llllldisconnected probes for these sensors. WIKA Operating Instruction, model CTH7000... -
Page 41: Smart Probes
Smart Probe Errors Smart probe errors should never occur. They take the form – “Error 0xNN”, where NN is the error code. Please refer to WIKA Technical Support if this error is seen. WIKA Operating Instruction, model CTH7000... -
Page 42: Transport, Packaging And Storage
1. Wrap the instrument in an antistatic plastic film. 2. Place the instrument, along with shock-absorbent material, in the packaging. 3. If stored for a prolonged period of time (more than 30 days), place a bag, containing a desiccant, inside the packaging. WIKA Operating Instruction, model CTH7000... -
Page 43: Commissioning, Operation
▶ The instrument may only be installed and mounted by skilled personnel. ▶ Operation using a defective power supply unit (e.g. short-circuit from the mains voltage to the output voltage) can result in life-threatening voltages at the instrument! WIKA Operating Instruction, model CTH7000... -
Page 44: Faults
We recommend that the instrument is regularly recalibrated by the manufacturer, with time intervals of approx. 12 months. The basic settings will be corrected if necessary. Equipment Temperature controlled environment at +20°C ±2°C. Set of stable, calibrated (1ppm) resistors (3 ranges, 6 resistors). WIKA Operating Instruction, model CTH7000... -
Page 45: Dismounting, Return And Disposal
Upon contact with live parts, there is a direct danger to life. ▶ The dismounting of the instrument may only be carried out by skilled personnel. ▶ Only disconnect the pressure measuring instrument/measuring assembly/test and calibration installations once the system has been disconnected from the power! WIKA Operating Instruction, model CTH7000... -
Page 46: Return
This marking on the instruments indicates that they must not be disposed of in domestic waste. The disposal is carried out by return to the manufacturer or by the corresponding municipal authorities (see EU directive 2012/19/EU). WIKA Operating Instruction, model CTH7000... -
Page 47: Specifications
2 x 5 pin DIN Measurement configuration 4 wire Input impedance > 10M Max common and differential mode input ±40VDC, 28Vrms voltage 10.2 Display User interface, display 128 x 64 LCD with (optional) backlight Resolution 0.001 ºC WIKA Operating Instruction, model CTH7000... -
Page 48: Functions
EMC directive 2004/108/EC, EN 61326 (group 1, class B) and interference immunity (portable test and measuring equipment) Approvals and certificates, see website For further specifications see WIKA data sheet CT 55.50 and the order documentation. WIKA Operating Instruction, model CTH7000... -
Page 49: Communications Interface
Communications Interface 11.1 Introduction The CTH7000 is fitted with USB communication interface as standard. The connected PC must have the correct USB driver installed. Please refer to the installation CD and the ULOG help system. The USB PC interface will be installed as a virtual COM driver. The communication protocol is –... -
Page 50: Command Details
Command details SYSTEM:REMOTE Command SYSTEM:REMOTE Return None Function Places the CTH7000 in remote mode for USB control. CTH7000 indicates remote on the instrument display. Disables the instrument front panel keys (excluding backlight and power keys). SYSTEM:LOCAL Command SYSTEM: LOCAL Return... -
Page 51: Unit:temp?
Function Downloads the complete CTH7000 data log. LOG:ERASE 1 Command LOG:ERASE Return <complete> Function Erases (clears) the complete CTH7000 data log. Accessories Spare battery pack – to clip onto rear CTX-A-H6-Z-ZZZZBP-ZZZZ-ZZ-ZZZZ-ZZZZZZZ-Z Replacement battery charger CTX-A-H6-Z-ZZZZBC-ZZZZ-ZZ-ZZZZ-ZZZZZZZ-Z Carrying case CTX-A-H6-Z-ZZZZCC-ZZZZ-ZZ-ZZZZ-ZZZZZZZ-Z Windows datalogger software ULog CTX-A-H6-Z-ZZZZSG-ZZZZ-ZZ-ZZZZ-ZZZZZZZ-Z WIKA accessories can be found online at www.wika.com.
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