CHY FIREMATE CO. LTD. RF915 User Manual

 

       

 

(802W/802UW) 

 

 

This instrument is a 5 digit, compact-sized portable 

digital thermometer designed to use external K-type and J 
type thermocouples as temperature sensor. Temperature 
indication follows Reference Temperature/Voltage Tables 
(N.I.S.T. Monograph 175 Revised to ITS-90) for K-type 
and J-type thermocouples. Two K-type thermocouple are 
supplied with the thermometer. 
 

It is recommended that you read the safety and opera-

tion instructions before using the thermometer. 

To avoid electrical shock, do not use this instrument 

when working voltages at the measurement surface 

over 24V AC or DC.

 

To avoid damage or burns, do not make temperature 

measurement in microwave ovens.

 

 

Repeated sharp flexing can break the thermocouple 

leads. To prolong lead life, avoid sharp bends in the 

leads, especially near the connector.

 

 

 

This device complies with Part 15 of the FCC Rules. 
Operation is subject to the following two conditions:(1) 
this device may not cause harmful interference, and (2) 
this device must accept any interference received, in-
cluding interference that may cause undesired operation.
 

This equipment has been tested and found to comply 
with the limits for a Class B digital device, pursuant to 
Part 15 of the FCC Rules. These limits are designed to 
provide reasonable protection. This equipment gener-
ates, uses and can radiated radio frequency energy and, 
if not installed and used in accordance with the instruc-
tions, may cause harmful interference to radio commu-
nications. However, there is no guarantee that interfer-
ence will not occur in a particular installation If this 
equipment does cause harmful interference to radio or 
television reception, which can be determined by turn-
ing the equipment off and on, the user is encouraged to 
try to correct the interference by one or more of the fol-
lowing measures: 
 
- Reorient or relocate the receiving antenna. 
- Increase the separation between the equipment and 

receiver. 

- Connect the equipment into an outlet on a circuit dif-

ferent from that to which the receiver is connected. 

- Consult the dealer or an experienced radio/TV techni-

cian for help. 

 
Shielded interface cables must be used in order to com-
ply with emission limits. 
 
Changes or modifications not expressly approved by the 
party responsible for compliance could void the user‘s 
authority to operate the equipment.

 

 

Wireless receiver must keep a distance at least 40cm 

from the meter and meter to meter must keep a distance 

at least 30cm.

 

SPECIFICATIONS 

Temperature Scale: Celsius or Fahrenheit user-selectable. 
Measurement Range: 

J-TYPE -200°C to 1050°C, (-328°F to 1922°F) 
K-TYPE -200°C to 1370°C, (-328°F to 2498°F) 

Resolution: 0.1°C or 0.2°F 
Accuracy:  Accuracy is specified for operating tempera-

tures over the range of 18°C to 28°C (64°F to 82°F), for 
1 year, not including thermocouple error. 
±(0.05% rdg + 0.3°C) -50°C to 1370°C 
±(0.05% rdg + 0.7°C) -50°C to -200°C 
±(0.05% rdg + 0.6°F) -58°F to 2498°F 
±(0.05% rdg + 1.4°F) -58°F to -328°F 

0.1 times the applicable accuracy specification per °C 
from 0°C to 18°C and 28°C to 50°C (32°F to 64°F and 
82°F to122°F). 

24V dc or 24V ac rms maximum input voltage on any 
combination of input pins. 

Maximum Differential Common Mode Voltage 
(Maximum Voltage between T1 and T2 during meas-
urement): 1volt. 
Reading Rate: 1 time per second. 
 
Back Side: (802U/802UW) 
1. USB Port 
2. DC power JACK(12V) 
 

 Wireless Features: (802W/802UW) 

Frequency range: 904~927.83MHz 
Low current consumption les than 5 to 20mA 
Viewable distance 25M 
 

0°C to 50°C (32°F to 122°F) <80% R.H. 

-20°C to 60°C (-4°F to 140°F) <70% R.H. 

Display: 5 digit liquid crystal display (LCD). 
Overload: “----.-” or “OL” is display. 
Battery: 1.5V x 4 PCS (SIZE AAA) UM-4 R03. 
Battery Life: 190 hours typical with carbon zinc battery. 
Auto power off: The meter key switches inactive for more 

than 30 minutes, press power key to resume operation. 

Dimensions: 160mm(H) x 83mm(W) x 38mm(D) 
Weight: Approx. 270g including batteries. 
Supplied Wire: 4 feet type “K” thermocouple bead wire 

(Teflon tape insulated). Maximum insulation tempera-
ture 260°C (500°F). Wire accuracy ±2.2°C or ±0.75% of 
reading (whichever is greater) from 0°C to 800°C. 

Input Connector: Accepts standard miniature thermocou-

ple connectors (flat blades spaced 7.9mm, center to cen-
ter). 

 

The “

” key turns the thermometer on or off. In the 

data SET mode, can not power off, must leave data SET 
mode then power off. 

Pressing “

”  power key > 6 seconds to disable 

auto-power function, and the display shows “APO 
OFF”. 

Readings are dual displayed in either degrees Cel-

sius(°C) or degrees Fahrenheit(°F). When the ther-
mometer 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 °C/°F 
key. 

3. 

Press the key to enter the Data Hold mode, the 

“HOLD” annunciator is displayed. When HOLD mode 
is selected, the thermometer held the present readings 
and stops all further measurements. Press the 

  key 

again to cancel HOLD mode causing thermometer to 
resume 

taking 

measurements. In the MIN/MAX re-

cording mode, press 

  key to stop the recording. 

Press 

  key again to resume recording. (Previously 

recorded reading is not erased). 

Pressing the 

  button over two seconds to turn 

on and pressing the button again over two seconds to 
turn off the backlight. The backlight will switch-off 
automatically after 30 seconds. 

The input selection indicates which input is selected 

for main display; T1 thermocouple, T2 thermocouple or 
the difference between the two thermocouples (T1-T2), 
when the thermometer is turned on, it is set to T1, when 
main display input selected T1, then T1 input can select 

1

2