AC resistance thermometry bridge

Name: AC resistance thermometry bridge
Brand: WIKA

High-performance AC resistance thermometry bridge for very accurate temperature measurements in a range of -200 ... +962 °C

Range

-200…962 °C

Price

On request

Depends on configuration

Request a quote

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Description

The performance of the model CTR6500 resistance thermometry bridge is improved significantly by using the proven AC bridge technology. Due to the elimination of thermal EMF errors and the automatic cancellation of probe and cable reactance effects, the CTR6500 provides exceptional stability with time and ambient temperature and has an excellent resolution thanks to inherently low noise.

These make the CTR6500 perfectly suited to high-accuracy temperature measurement and calibration.

AC resistance thermometry bridge model CTR6500

The CTR6500 has 25 Ω and 100 Ω internal standard resistors and can also be used with external standard resistors. It has a ratio range of 0 ... 4.9999999 or 0 ... 500 Ω resistance and is capable of measuring temperature ranges to meet ITS 90, CVD and EN 60751 standards.

The results are shown on the large-scale, multi-function VFD screen. The mean, min and max value, standard deviation and the sampling rate can also be displayed with a separate graphical display. To ensure the long-term reliability the CTR6500 uses surface mount technology with no mechanical relays.

Special features

Resolution 0.1 ppm / 0.001 mΩ / 0.01 mK
25 Ω and 100 Ω internal reference resistors
Channels expandable from 1 to 60 via multiplexers
Multifunction VFD with numeric, statistical or graphical information

Identification

Model	CTR6500
Product family	CTR
Subcategory	Resistance thermometry bridge

Measuring range

Temperature ranges

−200…+962 °C

Accuracy

Uncertainty

±0.01 % (uncalibrated); Ratio range 0 ... 1 accuracy 0.4 ppm equivalent to 0.1 mK at 0 °C

Process conditions

Calibration type

temperature_bath

Operating environment

Ambient temperature	+15…+25 °C
Weight	9 kg

Certifications and approvals

Certifications

Additional details

Portable	No
Datasheet languages	EN

Tables from datasheet

Specifications	Model CTR6500
Probe types	Industrial platinum resistance thermometers (PRTs) and standard platinum resistance thermometers (SPRTs) with Ro = 25 Ωand 100 Ωup to an alpha of 0.00392
Input channels	2 on the main device (one PRT, SPRT or resistor + one reference resistor) 60 over multiplexer CTS9000
Input connections	4 x BNC + shield (front panel)
Data entry format	ITS 90 and CVD for calibrated probes; or EN 60751 for uncalibrated probes
Measuring ranges
Sense current	100 µA, 200 µA, 500 µA, 1 mA, 2 mA, 5 mA, 10mA
Sense current mulitpliers	x √2
Temperature range	-200 ...+962 °C, depending on thermometer probe
Resistance range	0…500Ω
Internal resistors
Values	25 Ω, 100Ω
Thermal stabilityTCR	±0.1 ppm/°C
Accuracy	±0.01 %(uncalibrated)
Accuracy 1)	Ratio range 0 ... 1 accuracy 0.4 ppm equivalent to 0.1 mKat 0 °C Ratio range 1 ... 2 accuracy 0.6 ppm equivalent to 0.3 mKfull range Ratio range 2 ... 3 accuracy 0.8 ppm equivalent to 0.8 mKfull range Ratio range 3 ... 5 accuracy 1 ppm equivalent to 1.25 mKfull range
Display
Screen	large graphicVFD display screen (adjustable brightness)
Units	Ratio, °C, °F, K orΩ
Resolution	0.1 ppm 0.01mK 0.001mΩ
Functions
Real-time clock	integrated clock with date
Voltage supply
Power supply	AC 90 ... 264 V, 47 ... 63 Hz; universal rear input on rear panel
Power consumption	max.95VA
Permissible ambient conditions
Operating temperature	15 ... 25 °C
Storage temperature	-20 ...+50 °C
Communication
Interface	USB, RS-232 or IEEE-488.2
Case
Dimensions	455 x 150 x 450mm(WxHxD)
Weight	9 kg

CE conformity
EMCdirective	2004/108/EC, EN 61326 emission (group 1, class B) and interference immunity (portable test and measuring equipment)

Model	Dimensions	Temperature range	Detector length
CTP5000-652	Pt100, d = 6 mm, l = 450 mm(without spring strain relief, 100 mmhandle)	-70 ...+650 °C	30mm
CTP5000-651	Pt100, d = 7.5 mm, l = 450 mm(125 mmhandle)	-189 ...+650 °C	50mm

Model	Dimensions	Temperature range	Detector length
CTP5000-T25	Pt25, d = 6.5 ... 7.5 mm, l = 480mm	-189 ...+660 °C	45mm

View all (7)

Key	Description	Function
Instrument function keys
Disp	Select display type	Alternates numerical, graphical, standby display
Chan	Select input channel	Opens and closes the Rt /R s channel select menu
Zero	Zero display measurement	Opens and closes the display zero (null) menu
Hold	Hold display measurement	Starts and stops display (measurement continues)
Curr	Select operating current	Opens and closes the sensor-current menu
Gain	Select instrument gain	Opens and closes the instrument-gain menu
Filter	Select filter value	Opens and closes measurement-bandwidth menu
Units	Select display units	Opens and closes the display-units menu
Shift key	Shift key	Selects lower function keys (and, Exp or +)
Instrument function shift keys
Func	Select function menu	Selects function menu
Probe	Select probe menu	Opens and closes probe menu
=0=	Zero check	Selects zero check
=1=	Unity check	Selects unity check
√2	Set current	Sets root 2 current
Auto/Man	Reserved turns	Automatic gain selection ON/OFF
Rs	Select reference resistor	Opens the reference resistor menu
Menu function keys
Back	Clear data entry/return	Clears any data entry errors or returns from a menu
Menu	Menu selection	Displays other submenus
▲▼◀▶	Arrow keys	Used to navigate through the menus
OK	Save entry	Saves data entry and returns to previous menu

Key	Description	Function
Numeric keys
0 ... 9	Numerical data entry	Enters a numerical digit or selects a numeric menu
-	Minus key	Used during numerical data entry
.	Decimal point	Used during numerical data entry
Numeric shift keys
Exp	Exponent key	Used for numerical data entry (with the shift key)
+	Plus key	Used for numerical data entry (with the shift key)

Specifications	Precision resistor module, model FR4
Accuracy	1 ... 10 Ω±0.005 %(50 ppm) > 10 ... 100 Ω±0.0025 %(25 ppm) > 100 ... 1,000 Ω±0.001 %(10 ppm)
Stability	< 2 ppm per year
Temperature coefficient	< 0.6 ppm/°C