Precision RTD User manual

CONTENTS
TITLE PAGE
1. Introduction………………………………………………………………….…………….1
2. Specifications……………………………………………………………………………...1
3. Symbol Definition and Button Location………......................................................2
4. Operation Instructions……………………….…………………..................................3
4.1 Power-Up……………...........................................................................................3
4.2 Connection the Temperature Probe………..........................................................3
4.3 Selecting the Temperature Scale……………..……………………………………..3
4.4 READ Operation…………………………………………………………………..…..3
4.5 Back light Operation…………………………………………………………………..3
4.6 Relative Operation……………………………………………………………............3
4.7 Memory Operation………………………………………………………...................3
4.8 MAX/MIN Operation………………………….……………………………................3
4.9 Auto Power Off…………………………………………………………………………4
4.10 Low Battery Condition………………………………………..... …………………..4
5. Temperature Measurement……………………………………....... …………………..4
6. Setting the Time…………………………………………………………........................5
7. Clearing Memory………………………………………………………………………….5
8. Temperature Meter Calibration Setup ……….………………………………………..6
9. Power Preparation……………………………………………………………..…….......7
10. Maintenance .….………………………………………………………………...……… 7
11. Temperature Probe.……………………………………………………………............8

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1. INSTRUCTION
This instrument is a digital thermometer for use with platinum-type temperature sensor.
Temperature indication follows IEC751 temperature table for PT-type sensor.
2. SPECIFICATIONS
Numerical Display: 5 digital liquid crystal displays
Measurement Range: -100°C ~ 400°C; -148°F ~ 752°F
Resolution: 0.01°C; 0.02°F;
Sensor types:
Platinum resistance temperature sensor for pt-100 4 wires.
ALPHA=0.00385
Environmental:
▪Operating Temperature and Humidity:
0°C ~50°C (32°F ~ 122°F) ; 0 ~ 80% RH
▪Storage Temperature:
-10°C to 60°C (14°F ~ 140°F); 0 ~ 80% RH
▪Altitude up to 2000 meters.
Accuracy: at ( 23 ± 5°C )
Range
Accuracy
-100°C ~ 400°C
±(0.05% reading + 0.1°C)
-148°F ~ 752°F
±(0.05% reading + 0.2°F)
Temperature Coefficient:
For ambient temperatures from 0°C ~ 18°C and 28°C ~ 50°C, for each °C ambient below 18°C or
above 28°C add the following tolerance into the accuracy spec.
0.005% of reading + 0.01°C ( 0.005% of reading + 0.02°F )
Note:
The basic accuracy Specification does not include the error of the probe please refer to the
probe accuracy specification for additional details.
Sample Rate: 2 times per second
Dimension: 185 x 65 x 36 mm(meter only)
Weight: 360gApprox.
Power requirement:
9V Battery;
AC adapter: 9V DC(7~10V Max.)/20mA Min (Plug Diameter: 3.5mmx1.35mm)
Battery Life: Approx. 100hours
Standard Accessory:
Pt-100 Probe(class A), Instruction manual, 9V Battery, carrying case.
Optional Accessories: AC adapter.

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3. SYMBOL DEFINITION & BUTTON LOCATION
: The Battery is not sufficient for proper operation.
MIN
: The Minimum value is now being displayed
MAX
: The Maximum value is now being displayed
: This indicates Auto Power Off is enabled.
REL
: The reading is now under Relative Mode.
°C °F
: Centigrade and Fahrenheit indication.
-
: This indicates that the minus temperature is sensed.
m-d
: month-day
h:m
: hours; minute
: Readings are being logged.
: Logged readings are display.
○
1Pt type temperature sensor connector
○
7°C , °F control button
○
2LCD display
○
8Read button
○
3Power ON/OFF and Back light button
○
9External DC 9V power supply jack
○
4Relative readout button
○
10 Tilt stand
○
5Memory button
○
11 Battery Compartment
○
6MAX MIN control button

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4. OPERATION INSTRUCTIONS
4.1 Power-Up
Press the “”key to turn ON the thermometer and Press and hold “”buttons for 3 seconds
to OFF.
4.2 Connection the Temperature Probe
For measurement, plug the temperature probe into the input connectors.
4.3 Selecting the Temperature Scale
When the meter was first power on, the default scale setting is set at Celsius (°C) scale. The user
may change it to Fahrenheit (°F) by pressing button and vice versa to Celsius and change
default scale.
4.4 READ Operation
Press button to view logged readings. The display shows “ ”. Press or button
to scroll through the logged readings. The display shows each logged reading, its time stamp, and
its memory location. Press or or any button to exit READ mode.
4.5 Back light Operation:
Press the button will turn back light on and Press it once again will turn off.
The meter will turn back light off if there is no push button for 30 seconds.
4.6 Relative Operation:
When one press the button, the meter will memorize the present reading and the difference
between the new reading and the memorized data will be shown on the display. Press the
button again to exit the Relative operation.
4.7 Memory Operation:
The thermometer stores a single set of logged readings in memory each time you press
button. The thermometer has 99 memory locations.
4.8 MAX/MIN Operation:
When one press the button the meter will enter the MAXMIN mode. Under this mode the
maximum value, minimum value is kept in the memory simultaneously and updated with every new
data.
When the MAX symbol is display, the Maximum is shown on the display.
Press button again, then the MIN symbol is on the display and also the minimum reading.

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Press button again, MAX and MIN will blink together. This means that all these data is
updated in the memory and the reading is the present temperature.
One may press to circulate the display mode among these options.
When the meter is under MAXMIN operation, and button are disabled.
To exit the MAX/MIN mode, one may press and hold button for two seconds.
4.9 Auto Power Off:
By default, when the meter is powered on, it is under auto power off mode. The meter will power
itself off after 30 minutes if no key operation.
One may press and hold button and then power on the meter and there will be two
successive beeps to indicate that auto power off is disabled.
4.10 Low Battery Condition:
The temperature meter low battery indication as follows:
Low battery. Replace the batteries.
5. TEMPERATURE MEASUREMENT
5.1 Correct Measurement Method:
The temperature sensor is located at the end
of the metal sheath of the sheath type
TEMPERATURE PROBE. To accurately test
internal temperature insert the probe into the
item you want to measure to a distance at
least 15 times the diameter of the sheath.
5.2 Connector Configuration:

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6. SETTING THE TIME
6.1Press and hold button and then power on the meter to enter setup mode.
6.2 Press button to enter Time setting mode. The right two digits blink.
6.3 Press ▲or ▼button until the display shows the correct year, and then press
button to select. The left two digits blink.
6.4 Press ▲or ▼button until the display shows the correct month, and then press
button to select. The right two digits blink.
6.5 Press ▲or ▼button until the display shows the correct day, and then press
button to select. The left two digits blink.
6.6 Press ▲or ▼button until the display shows the correct hour (24-hour format), and then
press button to select. The right two digits blink.
6.7 Press ▲or ▼button until the display shows the correct minutes, and then press
button to store the time in memory.
Note:
Holding down “REC” or “°C/°F” causes the number to change more quickly.
7. CLEARING MEMORY
When memory is full, MEM appears and blinks on the display and logging stops.
You can clear memory in next power on the meter to enter clear memory mode.
Press and hold button and then power on the meter to enter clear memory mode to delete
logged readings from memory. The display shows the number from 5 decreases to 0.

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8. TEMPERATURE METER CALIBRATION SETUP
Below table diagram shows each button function when user enter into
calibration mode.
Note:
Turn the Power “OFF”before attempting following SETUP.
Setup mode is cancelled during below procedure if “POWER”
button is pressed.
8.1 Temperature Calibration
Place the temperature probe in a known, stable temperature environment. Allow the readings to
stabilize. In Setup change the offset until the display reading matches the calibration temperature.
Press and hold + buttons and then power on the meter to enter setup mode.
Press button to enter calibration mode.(in 3 seconds)
Press button to enter calibration mode. (in 3 seconds)
Press or button to confirm present Temperature value.
Press button twice to confirm selection.
Note: To abort during the process, press button to exit calibration mode.
8.2 Recall Default factory setting value
Press and hold + buttons and then power on the meter to enter setup mode.
Press button to enter calibration mode. (in 3 seconds)
Press button to enter recall mode. (in 3 seconds)

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Press button to confirm revert back to “Default factory setting value”
Press button to confirm selection.
Note: To abort during the process, press button to exit calibration mode.
9. POWER PREPARATION
9.1 Battery Loading
Remove the battery cover on the back and insert one 9V battery.
9.2 Battery Replacement
When the battery voltage drops below the operating voltage, Low battery indicator will
appear. Replace a 9 Volt battery immediately to ensure the unit functions properly.
9.3 AC Adapter Connection
When the AC adapter is used, insert the plugs of the adapter into the DC9V connector on the side
panel.
Note:
When the AC adapter is connected while battery is inserted, the unit will be powered from the
adapter (the AC adapter has priority).
10. Maintenance
In order to ensure the accuracy of the thermometer for a longer period of time you should calibrate
it once a year.
Clean the device and the window of the display with a clean, lint-free, antistatic and dry cleaning
cloth.
Do no use cleaning agents that contain carbon or benzenes, alcohol or anything similar to clean
the product since these substances damage the surface of the measuring instrument. Moreover, these
fumes are hazardous to health and explosive. Do not use tools with sharp edges, screwdrivers, metal
brushes or anything similar to clean the device.

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11. Temperature Probe
11.1 Piercing type temperature probe.
11.2 Piercing type temperature probe Specification:
Sensor Type
Platinum resistance thermometer sensor Pt 100(4 wires)
Accuracy
IEC751, class A
0.15C0.002t
(t: measurement temperature)
Measurement Range
-100 to 400C
Temperature Sensor Dimensions
Approx. 5.0mm(0.2”)
Temperature Sensor Length
Approx. 230mm(9.05”)
Cable Length
Approx. 1500mm(59.0”)