RADIANCE
INSTRUMENTS
LTD.
PRODUCT MANUAL
REV.: 3
PRODUCT MULTI-PURPOSE DIGITAL THERMOMETER
06 May. 2013
MODEL
RT801
Version: 12
PAGE 2 of 2
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DISPLAY BACKLIGHT
Press and hold [ ] button to turn on the backlight constantly.
HIGH / LOW TEMPERATURE ALARM SETTING (EXTERNAL SENSOR ONLY)
1.
Press & hold [
] button for about 2 seconds, the HIGH icon will be displayed and the figure would be flashed.
2.
Press [
C/
F] button to set the alarm high limit.
3.
Press [
] button once more and the LOW icon will be flashing.
4.
Press [
C/
F] button to set the alarm low limit.
5.
Press [
] again to finish the setting.
6.
During limits setting, holding [
C/
F] button will advance the value automatically.
7. If the external sensor reading is out of the set limits then the alarm will sound and the alarm icon [AL] will be
flashing.
ALARM ON / OFF
1. Press [
] button will switch on the alarm and the icon [AL] will be displayed.
2. Press [
] again will switch off the alarm and the icon [AL] will be disappeared.
ERROR SYMBOLS
Symbol
Description
Action required
X
Low battery voltage
Replace the battery with a same type new one
LLL
1) Sensor open circuit
2) The reading is out of low range (-50
C)
1) Return the thermometer for repair
2) Keep the measurement above low Range
HHH
1) Sensor short circuit
2) The reading is out of high range (70
C)
1) Return the thermometer for repair
2) Keep the measurement below high range
