Rossmax TG250 Instruction Manual Download Page 2

Measurement  Range          

32.0ºC~42.9ºC (89.6~109.2ºF) 

Display

LCD 3 1/2 digits with ºC

Display resolution

0.1ºC or 0.2ºF

Accuracy

±0.1°C 35.5°C~42.0°C(±0.2°F 95.9°F~107.6°F)

±0.2°C under 35.5°C or over 42.0°C
(±0.4°F under 95.9°F or over 107.6°F)
at standard room temperature 25.0°C (77.0°F)

Memory

For storing the last measured value

Battery

One 1.5 V DC. button size battery (SR41 or 
LR41)

Battery Life

Approx. 1500 times operation or 1 year with 
1-2 measurement per day including standby 
mode.

Dimension

TG250 : 13.2x2.3x1.3cm
TG380 : 13.2x2.3x1.3cm

Weight

TG250 : 14.5 grams including battery
TG380 : 14.5 grams including battery

Alarm

beep sounds(beep-beep-beep 10 times) when 
peak temperature is reached

Environmental for 

using

Temperature: 5~40ºC (41ºF~104ºF)
Humidity: ≤95%RH

Waterproof Level

Waterproof

Storage and trans-
portation condition

Temperature: -25.0°C~55.0°C (-13.0°F~131.0°F)
Humidity: ≤95%RH

Accessories 

battery, carry case, instruction manual

Safety classification 

 Type B Applied Part 

Guidance and manufacturer’s declaration-electromagnetic immunity

The TG250/TG380 is intended for use in the electromagnetic environment specified below.
The customer or the user of the TG250/TG380 should assure that is used in such and environment.

Immunity test IEC 60601 test level Compliance level Electromagnetic environment-guidance

Conducted RF
IEC 61000-4-6

Radiated RF
IEC 61000-4-3

3 Vrms
150 KHz to 80 MHz

3 V/m
80MHz to 2,5 GHz

Not applicable

3 V/m

Portable and mobile RF communications equipment 
should be used no closer to any part of the TG250/
TG380 including cables, than the recommended 
separation distance calculated from the equation 
applicable to the frequency of the transmitter.

Recommended separation distance:

d = 1,2 √P
d = 1,2 √P 80MHz to 800 MHz
d = 2,3 √P 800MHz to 2,5 GHz
Where P is the maximum output power rating of the 
transmitter in watts (W) according to the transmitter 

manufacturer and d is the recommended separation 

distance in metres (m).
Field strengths from fixed RF transmitters, as deter

-

mined by an electromagnetic site survey. 
a.  Should be less than the compliance level in each 

frequency range.

b.  Interference may occur in the vicinity of equipment 

marked with the following symbol:

Specifications

EMC guidance and manufacturer’s declaration

This instrument is covered by a 

5 year guarantee

 from the date of 

purchase, batteries and accessories are not included. The guaran-
tee is valid only on presentation of the guarantee card completed 

by the dealer confirming date of purchase or the receipt. Opening 

or altering the instrument invalidates the guarantee. The guaran-
tee does not cover damage, accidents or non-compliance with the 
instruction manual. Please contact rossmax service.

Warranty

IN0TG2500000000XX

OBM_IB_TG250_TG380_EN_ver1303

Product Information

Date of purchase:

Store where purchased:

Price Paid (excl. Tax):

Purchase for: 

Guidance and manufacturer’s declaration-electromagnetic emissions 

The TG250/TG380 is intended for use in the electromagnetic environment specified below. 
The customer or the user of the TG250/TG380 should assure that it is used in such an environment. 

 Emission test

Compliance

Electromagnetic environment-guidance

RF emissions CISPR 11

Group 1

The TG250/TG380 uses RF energy only for its internal func-

tion. Therefore, its RF emissions are very low and are not 
likely to cause any interference in nearby electronic equip

-

ment. 

RF emissions CISPR 11

Class B

The TG250/TG380 is suitable for use in all establishments, 
including domestic establishments and those directly con

-

nected to the public low-voltage power supply network that 
supplies buildings used for domestic purposes. 

Harmonic emissions 
IEC 61000-3-2

Not applicable

Voltage fluctuations/
flicker emissions IEC 

61000-3-3

Not applicable

Guidance and manufacturer’s declaration-electromagnetic immunity

The TG250/TG380 is intended for use in the electromagnetic environment specified below.
The customer or the user of the TG250/TG380 should assure that it is used in such an environment.

Immunity test

IEC 60601 test level Compliance level Electromagnetic environment-guidance

Electrostatic 

discharge(ESD) 

IEC61000-4-2

+ 6 kV contact
+ 8 kV air

+ 6 kV contact
+ 8 kV air

Floors should be wood, concrete or ceramic 
tile. If floors are covered with synthetic 
material, the relative humidity should be at 

least 30%

Electrical fast 

transient/burst 

IEC61000-4-4

+ 2kV for power 

supply lines
+ 1kV for input/
output lines

Not applicable

Not applicable

Mains power quality should be that of a 

typical commercial or hospital environ-

ment.

Surge IEC 61000-

4-5

+ 1kV line(s) to 
line(s)
+ 2kV line(s) to 

earth

Not applicable

Not applicable

Mains power quality should be that of a 

typical commercial or hospital environ-

ment.

Voltage Dips, short 

interruptions and 
voltage variations 

on power supply 

input lines IEC 
61000-4-11

<5% UT(>95% dip 
in UT) for 0,5 cycle
40% UT(60% dip in 
UT) for 5 cycles
70% UT(30% dip in 
UT) for 25 cycles
<5% UT(>95% dip 
in UT) for 5 s

Not applicable

Not applicable

Not applicable

Not applicable

Mains power quality should be that of a 

typical commercial or hospital environ-

ment.  If  the  user  of  the TG250/TG380 
requires continued operation during power 

mains interruptions, it is recommended 

that the TG250/TG380 be powered from 
an uninterruptible power supply or a bat

-

tery.

Power fre

-

quency(50/60 Hz) 
magnetic field IEC 

61000-4-8

3 A/m

3 A/m

The TG250/TG380  power  frequency 
magnetic fields should be at levels char

-

acteristic of a typical location in a typical 

commercial or hospital environment.

NOTE UT is the a.c. mains voltage prior to application of the test level.

Recommended separation distance between portable and mobile RF communications equipment and 

the TG250/TG380

The TG250/TG380 is intended for use in an electromagnetic environment in which radiated RF distur

-

bances are controlled. The customer or the user of the TG250/TG380 can help prevent electromagnetic 
interference by maintaining a minimum distance between portable and mobile RF communications 
equipment (transmitters) and the TG250/TG380 as recommended below, according to the maximum 
output power of the communications equipment.

Rated maximum output 

power of transmitter W

Separation distance according to frequency of transmitter m

150 kHz to 80 MHz

d =1,2√P

80 MHz to 800 MHz

d =1,2√P

800 MHz to 2,5 GHz

d =2,3√P

0,01

N/A

0,12

0,23

0,1

N/A

0,38

0,73

1

N/A

1,2

2,3

10

N/A

3,8

7,3

100

N/A

12

23

For transmitters rated at a maximum output power not listed above, the recommended separation 
distance d in meters (m) can be estimated using the equation applicable to the frequency of the trans

-

mitter, where P
The maximum output power rating of the transmitter in watts (W) according to the transmitter manu

-

facturer.
NOTE1 At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
NOTE2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by 
absorption and reflection from structures, objects and people.

NOTE1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by 
absorption and reflection from structures, objects and people.
a  Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones 

and land mobile radios,amateur radio, AM and FM radio broadcast and TV broadcast cannot be pre

-

dicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmit

-

ters, an electromagnetic site survey should be considered. If the measured field strength in the location 
in which the TG250/TG380 is used exceeds the applicable RF compliance level above, the TG250/
TG380 should be observed to verify normal operation. If abnormal performance is observed, additional 
measures may be necessary, such as re-orienting or relocating the TG250/TG380.

b Over the frequency range 150 kHz to 80 MHz, field strengths should be les than 3 V/m.

 www.rossmax.com

         Rossmax International Ltd. 

 

               12F., No. 189, Kang Chien Rd., Taipei, 114,
                Taiwan.

  Rossmax Swiss GmbH, 

               Tramstrasse 16, CH-9442 Berneck, Switzerland

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