SPECIFICATIONS
ELECTRICAL
Temperature Scale: Celsius or Fahrenheit
Measurement Range:
Pt385(100Ω)
Resolution: 0.1°C or 0.2°F
Accuracy:
Accuracy is specified for operating temperatures over the range of 18°C to 28°C (64°F to 82°F), for 1 year, not including RTD probe error.
±(0.05% rdg + 0.2°C) on °C scale ±(0.05% rdg + 0.4°F) on °F scale
Temperature Coefficient:
0.1times 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 to 122°F).
Input Protection:
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.
Input Connector:
Accepts for RTD 4 wires subminiature
Wireless Features: Frequency range: 910~920MHz
Low current consumption less than 1mA
The transmitting distance can reach 25M without mag- netic interference.
ENVIRONMENTAL
Ambient Operating Ranges:
0°C to 50°C (32°F to 122°F) <80% R.H.
Storage Temperature:
GENERAL
Display:
4½ digit liquid crystal display (LCD) with maximum reading of 19999.
Overload:
Battery:
1.5V x 4 PCS (SIZE AAA)
Battery Life:
200 hours typical with carbon zinc battery.
Auto power off: 30 minutes, press power key to resume operation.
Dimensions:
160mm(H) x83mm(W) x 38mm(D). Weight: Approx. 255g including batteries.
OPERATING INSTRUCTIONS
1. “
” Power Button
The “
” key turns the thermometer on or off. In the SET mode cannot be powered off. Exit SET mode to power off.
APO function mode
Press “
” power key for more than 6 seconds to disable the
2. °C/°F Selecting the Temperature Scale (Main display)
Reading the main displayed in either degrees Celsius(°C) or degrees Fahrenheit(°F). 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 “°C/°F” key.
3. “
” Display Back-Light
Press the “
” key to turn on or turn off the
4.T1 T2/T1-T2 Main display Input Selection
The input selection indicates which input is selected for main display; T1 probe, T2 probe or the difference be- tween the two probes
5.TYPE(Pt385/Pt3926/Pt3916) Input RTD
Probe Select (only Main display)
The “TYPE” key switches the T1 input to select the Pt385, Pt3926 or Pt3916 RTD probe as input, when main display input selected T1. When the thermometer is turned on, it is set to the probe selected that was in use when the thermometer was last turned off.
6. MIN/MAX with Time record mode (only Main display)
Press “MIN/MAX” key to enter the MIN MAX Re- cording mode, (displays the Maximum reading with time, Minimum reading with time and Average reading stored in record mode). In the this mode the automatic 
” key, “°C/°F” key, “REL” key, “SET” key, “Hi/Lo Limits” key and main display “T1 T2
Press “MIN/MAX” key to cycle through the MAX, MIN and AVG readings. If an overload is recorded, the aver- aging function is stopped. In this mode, press the “HOLD” key to stop the recording of readings, all values are held, press again to restart recording.
To prevent accidental loss of MIN, MAX and AVG data, this mode can only be cancelled by pressing and holding the “MIN/MAX” key for 2 seconds. All recorded read- ings are erased.
7. REL Relative mode (only Main display)
Press the “REL” key to enter the relative mode, zero the display, and store the displayed Reading as a reference value. REL is shown on the display. Press “REL” key again to exit the relative mode. The relative reference value can also be entered by the user. (See “SET mode” later in this manual). When the desired relative value has been entered, press “REL” key to enter the relative mode and than press “SET” key use the entered relative value as a reference value. Press “REL” key again to exit the relative mode. In the relative mode, the value (can not >±1999.9 counts) shown on the LCD is always the dif- ference between the stored reference and the present reading.
8. HOLD mode (only Main display)
Press the “HOLD” 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 “HOLD” key again to cancel HOLD mode causing thermometer to resume taking measurements. In the MIN/MAX re- cording mode, press “HOLD” key to stop the recording. Press “HOLD” key again to resume recording. (Previ- ously recorded read are not erased).
9. SET mode (Relative value set, Time set and Hi/Lo Limits value set)
9.1Press the “SET” key to enter relative values SET mode (Press “ENTER” key to skip setting relative value). = = = =.= is displayed on the main display. The relative value is entered via overlay numbers, press overlay “ENTER” key to store the relative value, and advance to elapsed time set mode.
9.2Elapsed time set mode, (Press ENTER key to skip Elapsed time set mode) =.= = = : = = is displayed in second and third display. Time (hours, minutes, sec- onds) value is entered via overlay numbers, press overlay “ENTER” key to store time value. Elapsed time starts from set time value.
9.3Hi Limit value set mode, (Press “ENTER” key to skip Hi Limit value set mode), = = = =.= is displayed in main display, Hi Limit value is entered via overlay numbers, then press “ENTER” key to store the Hi Limit value. = = = =.= is displayed in main display, Lo Limit value is entered via overlay numbers, then press overlay “ENTER” key to store the Lo Limit value and exit SET mode.
9.4When the thermometer is turned on it uses the relative value and Hi/Lo Limits values that were entered when thermometer was last in use.
10.T1/T2 T1-T2 second display Input Selection
The input selection indicates which input is selected for second display; T1 probe, T2 probe or the difference between the two probes
11. TYPE(Pt385/Pt3926/Pt3916) Input RTD Probe select (second display)
The Pt385/Pt3926 key switches the T2 input to select the Pt385, Pt3926 or Pt3916 RTD probe as input, when sec- ond display input selected T2. When the thermometer is turned on, it is set to the RTD selected that was in use when the thermometer was last turned off.
12. Hi/Lo Limits mode (only Main display)
Press “Hi/Lo Limits” key to enter the Hi/Lo Limits com- parative mode. When the input temperature value ex- ceeds the Hi or Lo Limits value, the beeper emits a con- tinuous or pulsed tone. Press “Hi/Lo Limits” key again to exit the Hi/Lo Limits mode.
13. WIRELESS MODE:
Press the “
” key for more than two seconds to start wireless function. Press the “
” key again for another two seconds to stop wireless function. The wireless mode will shut down if there is no wireless signal for two min- utes.
To SET CH/ID to 00,00, press the “Hi/Lo Limits” key and “
” power key for more than 6 seconds with the
meter powered down. The meter will set channel and ID to 00,00 status. The second display will show 00, which means that the channel and ID has been set to 00.
To check the channel and ID of the meter:
When the meter is off, press “°C/°F” key and “
” for 5
seconds, LCD’s main display will show channel number, the second display will show ID number.
