Hand-held thermometer
Model CTH7000
Applications
■
Precision thermometer for very accurate temperature
measurements in a range of -200 ... +962 °C
■
Reference instrument for testing, adjusting and calibrating temperature measuring instruments in factories and
calibration laboratories
■
Self-contained, complete system also suitable for on-site
measurements/calibrations
Calibration technology
WIKA data sheet CT 55.50
Special features
■
Temperature range: -200 ... +962 °C
■
Stability: < 0.005 °C per year
■
Dual inputs measuring platinum resistance thermometers
(PRTs) and thermistors single or dierential measurement
■
High long-term stability
Description
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 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
dierence between them. Measurements can be logged
directly to memory or, use the USB port to control and data
log with the PC.
The CTH7000 will display a statistical analysis of
measurements, with average value, min and max values and
standard deviation. Because the CTH7000 will display in
ohms as well as temperature, it can even be used to calibrate
Hand-held thermometer model CTH7000
one probe against another. Most instruments require to enter
calibrated probe data into memory to optimise measurement
accuracy, which can mean a lot of data entering if you
change probes regularly.
With ASL's SMART connector on the probes, you only need
to store the data once - in the connector! The calibration
data stays with the probe - permanently. The probe can even
be used on another CTH7000 without any further action.
The SMART connector saves time and reduces error. If you
have existing calibrated or uncalibrated probes, no problem,
CTH7000 automatically registers if a probe is SMART or
normal.
Data sheets showing similar products:
Hand-held thermometer; models CTH6500, CTH65I0; see data sheet CT 55.10
Reference thermometer; model CTP5000; see data sheet CT 61.20
Page 1 of 6WIKA data sheet CT 55.50 ∙ 04/2014
Specications
Model CTH7000
Hand-held thermometer
Probe types Pt100 and Pt25 resistance thermometers, NTC thermistors
Measuring inputs 2
Data entry format ITS 90 and CVD for calibrated probes; or EN 60751 for uncalibrated probes
Measuring ranges
Probe current DC 1 mA (Pt100); Auto-select 1 mA, 10 µA and 3 µA for thermistors
Temperature range -200 ... +962 °C, depending on thermometer probe
Accuracy
Resistance thermometers
NTC thermistors 0 ... 400 Ω
1) The accuracy in K denes the deviation between the measured value and the reference value. (Only valid for indicating instruments.)
1)
Digital indicator
Display
Screen Large 4 1/2-digit two-line LCD screen with backlighting
Resolution 0.001 °C
Functions
Memory approx. 8,000 values
Functions via key press Statistical analysis: Min/Max, average and standard deviation, Hold, Zero, one-shot measure-
Real-time clock integrated clock with date and year
Voltage supply
Power supply Nickel-Metal Hydride (Ni-MH) rechargeable battery
Battery life approx. 20 hours of operation
Permissible ambient conditions
Operating temperature 15 ... 25 °C
Storage temperature -20 ... +50 °C
Communication
Interface USB
Case
Dimensions 232 x 97 x 53 mm (L x D x W)
Weight 500 g
0.015 K
400 Ω ... 50 kΩ
50 ... 400 kΩ
ment, measurement log
Charging socket built-in low battery indicator
±0.006 Ω
±0.01 % of reading
±0.02 % of reading
CE conformity, certicates
CE conformity
EMC directive 2004/108/EC, EN 61326 emission (group 1, class B) and interference immunity (portable test
and measuring equipment)
Certicates
Calibration Standard: 3.1 calibration certicate per DIN EN 10204
Option: DKD/DAkkS calibration certicate
Recommended calibration interval 1 year (depending on the conditions of usage)
Approvals and certicates, see website
Page 2 of 6 WIKA data sheet CT 55.50 ∙ 04/2014
Temperature probes
Resistance thermometer
Spring strain relief
2 metres
Engraved line
300 mm maximum insertion depth
350 or 450
Resistance thermometer (immersion probe) Temperature range
Pt100, d = 6 mm, l = 350 mm -50 ... +250 °C
Pt100, d = 6 mm, l = 350 mm -70 ... +450 °C
Pt100, d = 6 mm, l = 450 mm -70 ... +650 °C
ø6 or ø7
nominal
Centreline
of sensor
Resistance thermometer
Brazed weld
3 metres
Probe type (immersion probe) Temperature range
Pt100, d = 3 mm, l = 30 mm -50 ... +200 °C
NTC thermistor
Nylotron handle
Probe type (immersion probe) Temperature range
NTC thermistor R25 = 10 KΩ, d = 4 mm, l = 300 mm -50 ... +125 °C
Page 3 of 6WIKA data sheet CT 55.50 ∙ 04/2014
Resistance thermometer connection, 4-wire (5-pin DIN connector)
View towards front panel connector
Shield
Options
With DIN plug or SMART plug
With ASL's SMART connector on the probes, storing the data
is needed only once - in the connector! The calibration data
stays with the probe - permanently. It can even be used on
another instrument without any further action.
Viewed from top panel
Shield
The SMART connector saves time and reduces error.
If there are existing calibrated or uncalibrated probes, no
problem, CTH7000 automatically registers if a probe is
SMART or normal
Features of the hand-held thermometer
■
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 o to improve the
clarity of the display data
■
Recording and visualisation of temperature cycles with the
help of the ULog software
■
Data logger
The large graphic LCD screen is your direct link to the
instrument, presenting you with the measurement results and
information or menus to set and control the instrument.
The LCD screen is designed for viewing without any
reections under normal lighting. A backlight is provided in
case of darker ambient conditions.
1
4
3
2
1 2 Connection ports for temperature probe inputs
2 USB connection port for PC
3 Keypad
4 Large LCD display
Page 4 of 6 WIKA data sheet CT 55.50 ∙ 04/2014
Operation
The keys are used to select the various menu options.
Generally, no more than two menu levels are used. A few
(infrequently used options) require three menu levels.
Operation is simple once you are familiar with instrument.
Key Function
☼
▲
▼
◀
▶
A/B
0
II
Connection ports for inputs
There are two input channels; two 5-pin DIN input-sockets
are located at the rear of the instrument. These are designed
to take either platinum resistance thermometer (PRT) or
thermistor probes. Channel A is colour-coded red. Channel B
is colour-coded blue.
Menu display
Backlight
Up arrow
Down arrow
Left arrow
Right arrow
Clear (view statistics)
Enter
A/B channel select
Zero (oset) reading
Hold reading
ON/OFF
Keypad of CTH7000
2 Connection port for temperature probe inputs
Page 5 of 6WIKA data sheet CT 55.50 ∙ 04/2014
Scope of delivery
■
Model CTH7000 hand-held thermometer incl. battery
charger and USB cable
■
3.1 calibration certicate per DIN EN 10204
■
Choice of temperature probes
Option
■
DKD/DAkkS calibration certicate
■
UKAS calibration certicate
Accessories
Temperature probes
■
Immersion probe
■
Customer-specic probes are available on request
Voltage supply
■
Replacement battery charger with multiple power plugs
■
Spare battery pack to clip onto rear of CTH7000
Test case
■
Transport case, robust
Software
■
ULog
Ordering information
Model / Probe at input 1 / Connection input 1 / Probe at input 2 / Connection input 2 / Calibration / Software / Carrying case /
Additional order information
© 2013 WIKA Alexander Wiegand SE & Co. KG, all rights reserved.
The specications given in this document represent the state of engineering at the time of publishing.
We reserve the right to make modications to the specications and materials.
Page 6 of 6 WIKA data sheet CT 55.50 ∙ 04/2014
WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg/Germany
Tel. +49 9372 132-0
Fax +49 9372 132-406
info@wika.de
www.wika.de
04/2014 GB
Loading...