PRO RS-41 Digital Thermometer Instruction Manual
- June 1, 2024
- RS
Table of Contents
Instruction Manual
RS-41
Stock No: 123-1940
DIGITAL THERMOMETER
Introduction
This instrument is a portable 3 /2 digit., compact-sized digital thermometer designed to use external K-type thermocouple as temperature sensor. Temperature indication follows National Bureau of Standards and IEC584 temperature/voltage tables for K-type thermocouples. One K-type thermocouple is supplied with the thermometer.
Safety information
It is recommended that you read the safety and operation instructions before
using the thermometer.
Warning
TO AVOID ELECTRICAL SHOCK. DO NOT USE THIS INSTRUMENT WHEN VOLTAGES AT THE
MEASUREMENT SURFACE EXCEED 24V AC OR 60V DC.
Warning
TO AVOID DAMAGE OR BURNS. DO NOT MAKE TEMPERATURE MEASUREMENTS IN MICROWAVE
OVENS.
Caution
Repeated sharp flexing can break the thermocouple leads. To prolong lead life,
avoid sharp bends in the leads, especially near the connector.
The symbol on the instrument indicates that the operator must refer to “Input
protection” in this manual.
SPECIFICATIONS
Electrical
Temperature scale:
Celsius (℃), Fahrenheit (℉) or Kelvin (K) user-selectable
Measurement range:
-50℃ to 1300℃, -58℉ to 2000℉, 223K to 2000K
Resolution: 1℃ or 1℉, 0.1℃ or 0.1℉,1 K
Accuracy:
Accuracy is specified for operating temperatures over the range of 18℃ to
28℃(64℉ to 82℉), for l year, not including thermocouple error.
±2℃———————- -50℃ to 0℃
±4℉———————- -58℉ to 32℉
±5K———————- 223K to 273K
±(0.5% rdg+1℃)——– 0℃ to 1000℃
±(0.8% rdg+1℃)——– 1000℃ to 1300℃
±(0.5% rdg+2℉)——– 32℉to 2000℉
±(1.0% rdg+2K)——– 273Kto 2000K
Temperature coefficient:
0.1 times the applicable accuracy specification per ℃ from 0℃ to 18℃ and
28℃ to 50℃ (32℉ to 64℉ and 82℉ to 122℉).
Input protection:
60V dc or 24V rms ac maximum input voltage on any combination of input
pins.
Reading rate: 2.5 times per second.
Input connector:
Accepts standard miniature thermocouple connectors (flat blades spaced
7.9mm, center to center).
Environmental
Ambient operating range:
0℃ to 50℃ (32℉ to 122℉)
Storage temperature:
-20℃ to 60℃ (-4℉ to 140℉)
Relative humidity:
0% to 80% (0℃ to 35℃) (32℉ to 95℉)
0% to 70% (35℃ to 50℃) (95℉ to 122℉)
General
Display:
3 1/2 digit liquid crystal display (LCD) with maximum reading of 1999
Battery:
Standard 9V battery (NEDA 1604, IEC 6F22)
Dimensions:
162mm (H)×76mm(W)×38.5mm(D)
Weight: 210g
Supplied probe:
1 x 1.2m type “K” thermocouple bead probe (Teflon tape insulated).
Maximum insulation temperature 260℃(500℉)
Probe accuracy±2.2℃ or ±0.75% of reading (Whichever is greater) from 0°to 800℃
Operating instructions
Selecting the temperature scale
Readings are displayed in either degrees Celsius (℃), degrees
Fahrenheit (℉) or degrees Kelvin (K).When the thermometer is turned on, it is
set to the temperature scale that was in use when the thermometer was last
turned off. To change the temperature scale, press the “℃”, “℉”or “K” key.
Selecting the display resolution
The thermometer allows two choices of resolution:
High resolution: 0.1℃ or 0.1℉
Low resolution: 1℃ or 1℉
Overload display(1)
The digital display will indicate 1 when the input exceeds the measurement
range selected.
If measuring above 199.9º, change the resolution to 1º. Be certain to seat the
thermocouple connector properly and that the leads are not broken.
Hold mode
Press the “HOLD” key to enter the Data Hold mode, the “HOLD” annunciator is
displayed. When HOLD mode is selected, the thermometer holds the present
readings and stops all further measurements.
Press the “HOLD” key again to cancel HOLD mode and to resume taking
measurements
Max mode
Press the “MAX” key to enter the MAX mode. The thermometer then records and
updates the maximum values and the MAX annunciator appears on the display.
Press the “MAX” key again to exit the MAX recording mode.
In the MAX mode, press the “HOLD” key to stop the recording, press “HOLD”
again to resume recording
Backlight mode
Press the BACKLIGHT key to turn on the LCD backlighting function. The LCD
backlighting will auto-off after the BACKLIGHT key is released after
approximately 5 seconds.
Tc (Temperature compensator) checking mode
Press and hold the “Tc” key to enter the temperature compensatorchecking mode.
the thermometer will display inside temperature.
Maintenance & cleaning
- Repairs or servicing not covered in this manual should only be performed by qualified personnel.
- Periodically wipe the case with a dry cloth. Do not use abrasives or solvents on this instrument.
Battery replacement
WARNING
The following safety information must be observed to ensure maximum personal
safety during the operation of this Instrument.
To avoid electric shock, remove the thermocouple probes before removing the
battery door.
When replacing the instrument batteries, do not mix batteries of different
types or old and new batteries.
Check the battery polarity carefully when inserting the batteries.
To avoid electric shock, do not operate the meter until the battery door is in
place and fastened securely.
Do not short-circuit used batteries, disassemble them, or throw them in a
fire. Doing so may cause the batteries to explode.
Dispose of the used batteries in accordance with local regulations.
The battery symbol appears on the lower right of the LCD when the 9V battery
needs to be replaced.
Replace the 9V battery as follows:
- Turn the meter off and disconnect the temperature probe.
- Remove the rubber holster that surrounds the entire meter by pulling it over the top of the meter.
- Remove the small Phillips head screw on the rear of the meter.
- Open the battery compartment and replace the 9V battery.
- Re-assemble the meter before operating.
Limited warranty
This meter is warranted to the original purchaser against defects in material
and workmanship for 1 years from the date of purchase. During this warranty
period, RS Components will, at its option, replace or repair the defective
unit, subject to verification of the defect or malfunction. This warranty does
not cover fuses, disposable batteries, or damage from abuse, neglect,
accident, unauthorized repair, alteration, contamination, or abnormal
conditions of operation or handling.
Any implied warranties arising out of the sale of this product, including but
not limited to implied warranties of merchantability and fitness for a
particular purpose, are limited to the above. RS Components shall not be
liable for loss of use of the instrument or other incidental or consequential
damages, expenses, or economic loss, or for any claim or claims for such
damage, expense or economic loss. Some states or countries laws vary, so the
above limitations or exclusions may not applyto you. For full terms and
conditions, refer to the RS website.
Africa
RS Components SA
P.O. Box 12182, Vorna Valley, 1686 20 Indianapolis Street, Kyalami Business
Park, Kyalami, Midrand South Africa
www.rs-components.com| Japan
RS Components Ltd.
West Tower (12th Floor), Yokohama Business Park, 134 Godocho, Hodogaya,
Yokohama, Kanagawa 240-0005 Japan
www.rs-components.com
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Asia
RS Components Ltd.
Suite 1601, Level 16, Tower 1, Kowloon Commerce Centre, 51 Kwai Cheong Road,
Kwai Chung, Hong Kong
www.rs-components.com| U.S.A
Allied Electronics
7151 Jack Newell Blvd. S.
Fort Worth, Texas 76118 U.S.A.
www.alliedelec.com
China
RS Components Ltd.
Unit 501, Building C, The New Bund World Trade Center Phase II, Shanghai,
China
www.rs-components.com| South America
RS Componentes Limitada
Av. Pdte. Eduardo Frei M. 6001-71 Centro Empresas El Cortijo Conchali,
Santiago, Chile
www.rs-components.com
United Kingdom
RS Components Ltd.
PO Box 99, Corby, Northants.
NN17 9RS United Kingdom
www.rs-components.com| Europe
RS Components GmbH
Mainzer Landstraße 180
60327 Frankfurt am Main
Germany