Useful Features
The CTC-1205 is a very versatile calibrator with many integrated functions - you can run the calibration in four different ways.

MVI - Mains Power Variance
Immunity improves temperature stability Unstable mains power supplies are a major contributor to calibration inaccuracies. Traditional temperature calibrators often become unstable in industrial environments where large electrical motors, heating elements, and other devices are periodically cycled on and off. The cycling of supply power can cause lower quality temperature regulators to perform inconsistently, leading to both inaccurate readings and unstable temperatures. The CTC series employ the MVI, thus avoiding such stability problems. The MVI circuitry continuously monitors the supply voltage and ensures a constant energy flow to the heating elements.

Special Features

User Specified Settings

Fast or silent mode calibration
The CTC-1205 calibrator can be programmed to run in silent operation. This function is an advantage if calibrating in a laboratory or an office. If used in silent operation the calibrator is not using its full cooling potential.

Support rod set
The support rod can be mounted on all CTC calibrators. It is used to hold the sensor under test in its position while calibrating. Indcludes rod, sensor grip and fixture. It is highly recommendable to use the original support rod set when using the STS-TC reference sensor.

Online firmware upgrade
You can download firmware and software upgrades at Here you can register your product so we can notify you when there is a firmware upgrade or other useful information regarding your instrument.

Protective carrying case
Our special designed protective carrying case gives excellent protection for the CTC calibrators. It has compartments for inserts, cables, manuals, plugs etc.

Calibration software included
The CTC is supplied with our highly versatile calibration software JofraCal. All calibrations can be documented with a certificate, provided that the CTC is controlled from a PC. When the calibrator has reached the desired temperature and stabillity it will prompt you to type in the UUT temperature. JofraCal documents all your calibration needs within temperature, pressure and process calibration.

Specifications CTC-1205

Temperature
Temperature Range
Range. 100 to 1205°C / 212 to 2201°F
Accuracy
CTC-1205 with internal ref. sensor. ±2°C /±3.6°F
CTC-1205 with external ref. sensor . ±2°C /±3.6°F
Stability
CTC-1205. ±0.1°C / ±0.18°F
Measured after the stability indicator has been on for 10 minutes.
Measuring time is 30 minutes.
Settings
Resolution. 1 or 0.1 or 0.01
Units. °C or °F or K
Heating Time
CTC-1205. 23 to 1205°C / 73 to 2201°F. 50 minutes
All specifications are given with an ambient temperature 23° C/73.4° F
± 3° C/5.9° F. Specified at 115 V/230 V.
Cooling Time
CTC-1205. 1205 to 300°C / 2201 to 672°F. 45 minutes
CTC-1205. 300 to 50°C / 672 to 122°F. 45 minutes
Time to Stability (typical)
CTC-1205. 15 minutes
Mains Power
Voltage. 115 V (90-127) / 230 V (180-254)
Max Power Consumption. 650 VA
Frequency, US deliveries . 60 Hz ±3
Frequency, non US deliveries. 50 Hz ±3, 60 Hz ±3

External Reference Sensor
STS-TC-N. 100 to 1205°C / 212 to 2201°F
Accuracy
Hysteresis (@ 0°C / 32°F) . 0.2°C / 0.36°F
Sensing element
Type. TC-N
Response time
STS-1205: t0.5 (50%) . 4 sec.
STS-1205: t0.9 (90%) . 15 sec.
Dimensions
Type. Angled
Diameter. 4,5 mm / 0.177 in
Length. 350 mm / 13.78 in

Inserts
Inserts for CTC-1205 are made of high temperature steel alloy. All specifications on hole sizes refer to the outer diameter of the sensor-under-test. The correct clearance size is applied in all predrilled inserts. All CTC-1205 inserts include an insulation plug.

Ordering Information
Standard Delivery
 CTC dry-block calibrator (user specified)
 Mains power cable (user specified)
 Traceable certificate - temperature performance
 Tool for insertion tubes
 User manual
 Test cables (1 x red, 1 x black)
 USB cable
 JofraCal calibration software

*Certified Accuracy
A traceable system calibration certificate will automatically be delivered. The STS sensor is calibrated in the supplied calibrator.

Accessories
STS-TC-N-A-1205-E-H. . .Reference sensor STS-TC
130029. Carrying Case
129539. . . . . . . . .Support Rod set:
incl. Rod, sensor Grip, Fixture for sensor grip and Fixing screw
125067. . . . . . . . .Sensor grip
125066. . . . . . . . .Fixture for sensor grip
129264. . . . . . . . .Thermal Protection Shield CTC-660/1205
122832. Cleaning Brushes - 4 mm - Package of 3 pcs
60F174. Cleaning Brushes - 6 mm - Package of 3 pcs
122822. Cleaning Brushes - 8 mm - Package of 3 pcs

EN ISO/IEC 17025
Laboratory Accreditation
AMETEK Sensors, Test & Calibration has two
EN ISO/IEC 17025 accredited laboratories
that issues accredited certificates in accordance
with international standards.
Laboratory accreditation is a reliable indicator of
technical competence assuring customers the
most accurate documentation. We believe in
being clear about our capabilities, our accuracy,
and about what you can expect from us.
Because calibration is a matter of confidence!