ThermoWorks Therma 20 Thermometers Instruction Manual
- June 4, 2024
- ThermoWorks
Table of Contents
ThermoWorks Therma 20 Thermometers
SPECIFICATIONS
(Therma 22)
- Range (Type T thermocouple): 239 to 752°F (–199.9 to 400°C)
- Range (Thermistor): –40 to 302°F (–39.9 to 149.9°C)
- Resolution: 0.1° to 572°F (300°C) thereafter 1°
- Accuracy (Type T thermocouple): ±0.9°F (±0.5°C) -58 to 302°F (-50 to 150°C)
- Accuracy (Thermistor): ±0.7°F (±0.4°C) 14 to 158°F (–10 to 70°C)
- Battery: 3 x AAA
- Battery Life – Thermocouple: Minumum 10,000 hours
- Battery Life – Thermistor: Minimum 5 years (20,000 hours)
- Sensor Type: Thermistor/Type T thermocouple
- Display: 0.47 inches (12mm) LCD
- Dimensions: 5 H x 2.2 W x 1 D inches (128 H x 56 W x 25 D mm)
- Weight: 0.29 lbs. (130 g)
(Therma 20 & ThermaCheck)
- Temperature Range: –40 to 302 °F (–39.9 to 149.9°C)
- Resolution: 0.1°F
- Accuracy (ThermaCheck): ±0.5°F (±0.3°C) to 158°F (70°C)
- Accuracy (Therma 20): ±0.7°F (±0.4°C) from 14 to 158°F (–10 to 70°C)
- Sensor: Thermistor
- Battery: 3 x AAA, minimum 5 years (20,000 hours)
- Auto-Off: After 10 minutes
- Display: 0.47 inches (12 mm) LCD
- Dimensions: 5 H x 2.2 W x 1 D inches (128 H x 56 W x 25 D mm)
- Weight: 0.29 lb. (130 g)
- Calibration: NIST-traceable calibration certificate
INSTRUMENT OPERATION
Where applicable (Therma 20 and Therma 22) connect a probe via the socket
located at the top of the instrument, screw in the collar of the plug, finger
tight, to ensure a secure connection (do not over tighten). Switch the
instrument on and apply the tip of the probe to the substance or medium to be
measured. The instrument reading may take a few seconds to stabilize,
depending on the nature of the measurement and sensitivity of the probe.
OPEN CIRCUIT/FAULTY PROBE
If the probe has developed an ‘Open Circuit’ fault the instrument will
display ‘Err’.
SENSORS
The ThermaCheck incorporates a fixed thermistor probe. The Therma 20 operates
with an interchangeable thermistor probe. The Therma 22 operates with either
an interchangeable thermistor or type T thermocouple probe. These instruments
are designed to be compatible with ThermoWorks manufactured probes.
CHANGE FROM FAHRENHEIT TO CELSIUS
Press and hold the “ON/OFF” button for 5 seconds at start up and the
displayed temperature will change from °F and °C.
BATTERY REPLACEMENT
The instrument will display ‘LO BAT’ to warn that the batteries will need changing soon. The instrument continues to measure accurately but after further usage the instrument will display ‘flat bat’ and shutdown. Replace the batteries with three AAA batteries located under the rear cover that is held in place by a single screw.
GUARANTEE
This instrument carries a two-year warranty against defects in either components or workmanship. During this period, products that prove to be defective will, at the discretion of ThermoWorks, be either repaired or replaced without charge. This warranty does not apply to probes, where a six- month period is offered. The product warranty does not cover damage caused by fair wear and tear, abnormal storage conditions, incorrect use, accidental misuse, abuse, neglect, misapplication, or modification. Full details of liability are available within ThermoWorks’ Terms & Conditions of Sale at www.thermoworks.com/productwarranty. In line with our policy of continuous development, we reserve the right to amend our product specification without prior notice.
For warranty, service, and technical assistance,
please contact ThermoWorks’ Technical Support at
801-756-7705
email at techsupport@thermoworks.com.