WIKA CTH7000 User manual

Hand-held thermometer, model CTH7000
GB
Hand-held thermometer, model CTH7000
Operating instructions

2 WIKA Operating Instruction, model CTH7000
GB
Hand-held thermometer, model CTH7000
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!
Keep for later use!

Contents
WIKA Operating Instruction, model CTH7000 3
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1. General Information...........................................................................................................6
2. Design and function..........................................................................................................7
2.1 Overview ............................................................................................................................7
2.2 Description......................................................................................................................... 7
2.3 Scope of delivery...............................................................................................................8
3. Safety .................................................................................................................................9
3.1 Explanation of symbols ....................................................................................................9
3.2Intended use ......................................................................................................................9
Application...........................................................................................................................9
Functionality........................................................................................................................9
3.3 Improper use....................................................................................................................10
3.4 Responsibility of the operator........................................................................................11
3.5 Personnel qualification...................................................................................................11
3.6 Personal protective equipment.......................................................................................11
3.7 Safety marks....................................................................................................................12
Symbols ............................................................................................................................12
4. Design and Function....................................................................................................... 13
4.1 Principles of measurement............................................................................................. 13
4.2 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)....................................................................................................................21
USB Communication interface connector ..........................................................................21
4.3 Instrument operating modes ..........................................................................................21
Measurement Mode...........................................................................................................21
Menu Mode (key)...........................................................................................................22
Selecting the thermometer input channel and differential mode (A/B key)..........24
Selecting relative temperature measurement (0 key) .........................................24
Selecting run/hold mode ().............................................................................25
Backlight key ()..............................................................................................25
Other menu options...........................................................................................................25
Selecting Units..................................................................................................26
Channel options menu (Channel A or Channel B)..............................................26
Data logging menu............................................................................................30
Statistics menu .................................................................................................32
Settings menu...................................................................................................33

Contents
4 WIKA Operating Instruction, model CTH7000
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System menu....................................................................................................35
Setting up Temperature measurement ..............................................................................38
Temperature measurement with Smart probe (s)...............................................38
Instrument calibration........................................................................................38
Firmware Version..............................................................................................38
Smart Probe review...........................................................................................................39
4.4 Instrument Measurement Range ....................................................................................40
Instrument measurement working range............................................................................40
Measurement Ranges .......................................................................................................40
4.5 Smart Probes...................................................................................................................41
About Smart Probes..........................................................................................................41
How Smart Probes Work................................................................................................... 41
Smart Probe Data Security................................................................................................41
Smart Probe Calibration Supervisor................................................................................... 41
Smart Probe Working Range Monitor ................................................................................41
Smart Probe Errors............................................................................................................41
5. Transport, packaging and storage................................................................................. 42
5.1 Transport..........................................................................................................................42
5.2 Packaging and storage ................................................................................................... 42
6. Commissioning, operation..............................................................................................43
7. Faults................................................................................................................................ 44
8. Maintenance, cleaning and servicing.............................................................................44
8.1 Maintenance.....................................................................................................................44
8.2 Recalibration.................................................................................................................... 44
Equipment.........................................................................................................................44
9. Dismounting, return and disposal..................................................................................45
9.1 Dismounting ....................................................................................................................45
9.2 Return............................................................................................................................... 46
9.3 Disposal ...........................................................................................................................46
10. Specifications..................................................................................................................47
10.1 Resistance thermometer measurement.........................................................................47
10.2 Display ............................................................................................................................. 47
10.3 Functions......................................................................................................................... 48
10.4 Supply .............................................................................................................................. 48
10.5 Environmental..................................................................................................................48
10.6 Dimensions and weight................................................................................................... 48
10.7 CE conformity.................................................................................................................. 48
11. 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

Contents
WIKA Operating Instruction, model CTH7000 5
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UNIT:TEMP? <units>........................................................................................51
LOG:DUMP 1....................................................................................................51
LOG:ERASE 1 ..................................................................................................51
12. Accessories ..................................................................................................................... 51
Declarations of conformity can be found online at www.wika.com.

2. Design and function or Short overview
6 WIKA Operating Instruction, model CTH7000
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1. General Information
The instrument described in the operating instructions has been designed and manufactured
using state-of-the-art technology. All components are subject to stringent quality and
environmental criteria during production. Our management systems are certified to ISO 9001
and ISO 14001.
These operating instructions contain important information on handling the hand-held
thermometer model CTH7000. Working safely requires that all safety instructions and work
instructions are observed.
Observe the relevant local accident prevention regulations and general safety regulations for the
range of use of the hand-held thermometer 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.
Skilled personnel must have carefully read and understood the operating instructions, prior to
beginning any work.
The general terms and conditions, contained in the sales documentation, shall apply.
Subject to technical modifications.
Factory calibrations/DKD/DAkkS calibrations are carried out in accordance with international
standards.
Further information:
WIKA Alexander Wiegand SE & Co. KG
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: CT 55.50
- Application consultant: Tel.: [phone]
Fax: [phone]
[email protected]
Abbreviations, definitions
Alpha, or ,
is the temperature coefficient, or temperature
sensitivity, of the platinum wire used in PRTs. In
general, the greater the alpha value, the better
the PRT thermometer measurement
reproducibility, stability and performance
PRT
(Platinum Resistance Thermometer)
Pt100
PRT with nominally 100resistance at 0°C
RTD
Resistance Temperature Device
System accuracy refers to the overall, combined accuracy of the CTH7000 and thermometer.

2. Design and function
WIKA Operating Instruction, model CTH7000 7
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2. Design and function
2.1 Overview
1. LCD display
2. Keypad
3. Inputs at the top
4. USB
2.2 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
instrument settings
USB communication interface as standard for automated monitoring and calibration
applications
Calibration against traceable external standards

2. Design and function or Short overview
8 WIKA Operating Instruction, model CTH7000
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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.
2.3 Scope of delivery
CTH7000 precision thermometer
Battery charger
Operator’s handbook on CD
Calibration certificate
USB lead
Software U-Log
Please contact the Service Team immediately if any of these items are missing or damaged.
Please retain the packaging. In case of return, servicing or calibration, use the original packaging.
Failure to do so may invalidate the warranty and/or incur additional costs outside the warranty
period. Please contact your agent, dealer or supplier when the original packaging is unavailable.

3. Safety
WIKA Operating Instruction, model CTH7000 9
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3. Safety
3.1 Explanation of symbols
DANGER!
... indicates a directly dangerous situation resulting in serious injury or
death, if not avoided.
WARNING!
... indicates a potentially dangerous situation that can result in serious injury or
death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in light injuries or
damage to property or the environment, if not avoided.
DANGER!
... identifies hazards caused by electrical power. Should the safety instructions not
be observed, there is a risk of serious or fatal injury.
Information
... points out useful tips, recommendations and information for efficient and
trouble -free operation.
3.2 Intended use
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.
Functionality
The CTH7000 can handle all needs, with accuracies and resolutions normally associated with a
bench top thermometer. Two inputs give direct temperatures from Pt100 or thermistor probes or can
display the temperature difference between them. Measurements can be logged directly to memory
or, use the USB port to control and data log with the PC.
Due to the wide range of this instrument it makes individual instruments needless and makes the
calibration cost-effective.

3. Safety
10 WIKA Operating Instruction, model CTH7000
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Features included:
■ Simple handling
■Large display with dual temperature display
■Min/Max value for monitoring of temperature limits
■Mean value function for statistical evaluation
■Selectable channel can be switched off to improve the clarity of the display data
■Recording and visualisation of temperature cycles with the help of the ULog software
■ Data logger
This instrument is not permitted to be used in hazardous areas!
The instrument has been designed and built solely for the intended use described here, and may
only be used accordingly.
The technical specifications contained in these operating instructions must be observed. Improper
handling or operation of the instrument outside of its technical specifications requires the instrument
to be taken out of service immediately and inspected by an authorised 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). Plugs and sockets must be protected from
contamination.
The manufacturer shall not be liable for claims of any type based on operation contrary to the
intended use.
For indoor use only.
Don't connect lines within a building which are longer than 30 m, or leave the building (including
lines of outdoor installations).
3.3 Improper use
WARNING!
Injuries through improper use
Improper use of the instrument can lead to hazardous situations and injuries.
▶ Refrain from unauthorised modifications to the instrument.
▶ Do not use the instrument within hazardous areas.
▶ Do not use the instrument with abrasive or viscous media.
Any use beyond or different to the intended use is considered as improper use.