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LR-Cal LTC 250-F
Portable temperature micro bath
+30...+255°C

LR-Cal LTC 250-F temperature micro bath
LR-Cal
  • Portable, operation via touch screen
  • Temperature range +30°C...+255°C
  • Accuracy ±0.1°C, stability ±0.01°C
  • Calibration bath volume 0.6 liter
  • (60 mm diameter, 195 mm immersion depth)
  • Option: exchangeable calibration bath inserts (thus easier change of operating liquid for different temperatures)
  • Option: metal block inserts with 4 to 12 holes, blackbody radiator, surface probe
Micro bath LR-Cal LTC 250-F Back side of the housing

Micro bath
LR-Cal LTC 250-F
Back side of the housing

Screenshot LR-Cal LTC 250-F

Screenshot
LR-Cal LTC 250-F

Micro bath LR-Cal LTC 250-F in optional carrying case

Micro bath
LR-Cal LTC 250-F
in optional carrying case

LR-Cal LTC 250-F Options + other accessories

DAkkS calibration certificate

Code: DKD-T-KAL-TK-6T
DKD-T-KAL-TK-6T

Option:
DAkkS calibration certificate
(instead of factory certificate)

Trolley case

Code: LTC-F-KOFFER
LTC-F-KOFFER

Accessory:
Sturdy trolley case with wheels and extendable handle

Silicone oil AC 20

Code: LTC-F-AC20
LTC-F-AC20

Accessory:
1 liter bottle with calibration medium
Silicone oil AC 20
Working range -20...+200°C
Flash point 240°C
Viscosity at 25°C: 20 cSt
Viscosity at 60°C: 12 cSt
Thermal
conductivity: 0.140 W/m K
Heat capacity: 1,5 KJ/kg K
Specific gravity: 0.95

Silicone oil AC 50

Code: LTC-F-AC50
LTC-F-AC50

Accessory:
1 liter bottle with calibration medium
Silicone oil AC 50
Working range +30...+220°C
Flash point 280°C
Viscosity at 25°C: 50 cSt
Viscosity at 60°C: 28 cSt
Thermal
conductivity: 0.140 W/m K
Heat capacity: 1,5 KJ/kg K
Specific gravity: 0.96

Silicone oil AC 100

Code: LTC-F-AC100
LTC-F-AC100

Accessory:
1 liter bottle with calibration medium
Silicone oil AC 100
Working range +70...+288°C
Flash point 315°C
Viscosity at 25°C: 100 cSt
Viscosity at 60°C: 50 cSt
Thermal
conductivity: 0.140 W/m K
Heat capacity: 1,5 KJ/kg K
Specific gravity: 0.97

Container insulation cover

Code: LTC-F-DECKEL-05
LTC-F-DECKEL-05

Spare part:
Calibration container lid (for calibration bath insert), for screwing in, made of transparent acrylic, with 5+1 holes.

This accessory allows convenient fixation of the DUTs and ensures less temperature loss through the vessel opening.

Note: 1 pc. is included in scope of delivery of the instrument.

LR-Cal LTC 250-F available block inserts


Calibration bath insert

Code: LTC-F-INSERT-FL
LTC-F-INSERT-FL

Accessory:
Calibration bath insert
incl. hanging basket, magnetic mixer rod and closing lid.

Immersion depth 190 mm
diameter 60 mm
Volume 0.7 liters

With additional calibration bath inserts, you simplify the use of the device considerably when you work with different silicone oils (due to temperature): You simply replace the insert instead of emptying and cleaning the bath each time.

Dry block insert
with 4 holes

Code: LTC-F-MB-04
LTC-F-MB-04

Accessory:
Metal dry block insert
with 4 holes
1x3.5 + 1x6.5 + 1x8.5 + 1x10.5
mm diameter

Dry block insert
with 10 holes

Code: LTC-F-INSERT-10
LTC-F-INSERT-10

Accessory:
Metal dry block insert
with 10 holes
2x3.5 + 2x4.5 + 2x6.5 + 2x8.5 + 2x10.5
mm diameter

Dry block insert
with 12 holes

Code: LTC-F-INSERT-12
LTC-F-INSERT-12

Accessory:
Metal dry block insert
with 12 holes
3x3.5 + 3x6.5 + 3x8.5 + 3x10.5
mm diameter

Dry block insert
with 10 holes

Code: LTC-F-INSERT-10S
LTC-F-INSERT-10S

Accessory:
Metal dry block insert
with 10 holes
2x3.5 + 4.5 + 5.0 + 5.5 + 6.5 + 8.5 + 9.0 + 9.5 + 10.5
mm diameter

Dry block insert (blank)
without holes

Code: LTC-F-INSERT-B
LTC-F-INSERT-B

Accessory:
Metal dry block insert
without holes
(for self-drilling)

Dry block insert
for surface probes

Code: LTC-F-INSERT-OF
LTC-F-INSERT-OF

Accessory:
Metal dry block insert
for temperature surface probes


Black Body insert

Code: LTC-F-INSERT-BB
LTC-F-INSERT-BB

Accessory:
Metal dry block insert
with Black Body

for testing, adjustment and calibration of non-contact infrared thermometers

Information about suitable calibration media

Calibration liquids for LR-Cal temperature calibration baths

Basically, temperature calibration baths can be filled with three types of calibration media:

  • Media that are in a liquid state at ambient temperature, e.g. oils, alcohol and water/alcohol mixtures.
      
  • Two-phase media which become liquid at the intended temperature application range of the calibrator. These are usually mixtures of potassium and sodium salts which are powdery at ambient temperature and become liquid at temperatures between 150°C and 500°C. They are used exclusively in calibration baths specially suited for this purpose.
      
  • Other solid substances which under certain circumstances or temperatures reach a state similar to a liquid medium, e.g. sand or aluminum powder with extremely fine grain/granularity.

DRUCK & TEMPERATUR Leitenberger GmbH does not use two-phase media for the calibration bath inserts, although their temperature range is very high.
This is because such media can be very dangerous for the user and even cause explosions.

DRUCK & TEMPERATUR Leitenberger GmbH also does not manufacture calibration bath inserts suitable for use with solid substances, e.g. aluminum powder.
This is because it is not possible to prevent 100% that corresponding powder particles get into the environment during operation of the calibrator. These media are not environmentally compatible.

The calibration media sold by DRUCK & TEMPERATUR Leitenberger GmbH for calibration bath inserts are therefore exclusively silicone oils.

Suitable calibration media for the LR-Cal LTC 150-F(-PLUS) + LTC 250-F micro baths:

Type of calibration medium (liquid) Possible field of application
*)		 Smoke flash point
***)
Silicone oil AC 05 -40...+125°C +42°C
Silicone oil AC 10 -30...+160°C +170°C
Silicone oil AC 20 -20...+200°C +240°C
Silicone oil AC 50 +30...+220°C +280°C
Silicone oilAC 100 +70...+288°C +315°C
*) The "possible range of use" describes the theoretical usability of the medium. However, the viscosity may be unfavorable for practical use as a calibration medium, especially in the lower part of the application range.
***) Above the specified temperatures, the smoke ignites (CAUTION: open fire!).

The calibration media are subject to wear (degeneration), which is greater the more often and longer they have been exposed to high temperatures. Therefore, avoid unnecessarily high temperatures over an unnecessarily long period of time.