Fieldpiece
Dual Temperature
Digital Thermometer
Model: ST4
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T1 |
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ºF |
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T1 |
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T2 |
MIN MAX |
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ºC |
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T1-T2 |
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T1 T2 |
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HOLD |
T1-T2 |
ºF |
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Min |
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HOLDT2 |
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/Max |
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1º/0.1º |
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ºC/T2ºF |
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ON OFF |
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T1 |
OFFSET |
T2 |
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ST4
OPERATOR’S MANUAL
Specifications
Measurement range: -58 to 2000ºF (-50 to 1300ºC)
Resolution: 0.1º
Temperature coefficient: 0.1 x (specified accuracy) per °C (0 to 18°C, 28 to 50°C)
System accuracy after field calibration:
±1ºF @ 30 to 120ºF with field calibration ±0.5ºC @ 0 to 50ºC with field calibration
Meter accuracy: Accuracies for any of the given ranges below are specified for operating temperatures between 64 to 82ºF (18 to 28ºC), for 1 year, not including thermocouple error.
±4ºF @ -58 to 32ºF
±(0.3% rdg + 2ºF) @ 32 to 1100ºF ±(0.5% rdg + 2ºF) @ 1100 to 2000ºF ±2ºC @ -50 to 0ºC
±(0.3% rdg + 1ºF) @ -50 to 600ºC ±(0.5% rdg + 1ºF) @ 600 to 1300ºC
Description
The ST4 is a portable standalone dual temperature thermometer. Plug in one or two of the supplied k-type thermocouples and find T1, T2, or T1-T2. The supplied rubber boot and case give the ST4 Dual Temperature Digital Thermometer plenty of protection and durability to last in the field.
The ST4 has been designed to be used while inside the carrying case. Use the magnet to hang it. The front is clear so you can press the buttons and read the display. The zippers allow the thermocouples to exit from the top of the case.
!WARNINGS !
To avoid electrical shock, do not use this instrument when voltages at the measurement surface exceed 24VAC or 60VDC.
To avoid electrical shock, disconnect thermocouples from the ST4 before opening case or battery cover.
To avoid damage or burns, do not take temperature measurements in microwave ovens.
When testing hot temperatures, the thermocouple and velcro may become hot. Do not handle the thermocouple or the velcro when hot.
Operation
1.Turn on the ST4.
2.Select ºC or ºF.
3. Plug in one or both of the k-type thermocouples to the top of the ST4. The red LED will light up when a necessary thermocouple isn’t engaged.
4. Press “T1” for the left thermocouple. Press “T2” for the right thermocouple. Press “T1-T2” to get the real-time difference between the two thermo- 
couple readings. 
5. Select temperature resolution by pressing the “1º/0.1º” button. 6. “HOLD” keeps current reading on screen until “HOLD” is pressed
again. 7. Press once to record MIN and MAX. Press once to toggle between MIN
and MAX. Hold down for 1 second to exit the MIN/MAX function.
8.Operate the ST4 in it’s case to take advantage of the hanger. You can operate the ST4 while still in the carrying case because of the clear front window.
Note: When in HOLD or MIN/MAX, you cannot change ºC/ºF or resolution (1º/0.1º).
Field Calibration
To calibrate the ST4, adjust the two “OFFSET” pots on the front of the meter labeled “T1” and “T2”. The best way to calibrate is to match to a known temperature. Ice water is very close to 32ºF (0°C) and is readily available. Accuracies of one degree or better are easily obtained.
1.Stabilize a large cup of ice water. Pure, distilled water will be the most accurate.
2.Immerse one probe in ice water and let it stabilize.
3.Select "T1" and adjust the "T1" calibration pot on the face of the meter to display 32.0 (0.0).
4.Remove T1 from the water and repeat the previous steps 3 and 4 for "T2".
Measurement rate: 2.5 readings/second Battery: Single standard 9-volt battery, NEDA
1604, JIS 006P, IEC 6F22.
Battery life: 100 hourscarbon zinc battery. 200 hoursalkaline battery. Replace when “ 
“ is displayed.
Operating environment: 32 to 122ºF (0 to 50°C) <70% RH
Storage environment: -8 to 140ºF (-22 to 60°C) <80% RH with battery removed from meter.
Display: 3.5 digits LCD, 2000 count Overrange: “OL” or “-OL” is displayed.
Accessories: 9V battery (installed), 2 k-type thermocouples, 2 Velcro straps, rubber boot, case, and operator’s manual.
Safety: Designed to meet EN61326-1, CE-EMC
Warranty
The product is warranted to the original purchaser against defects in material or workmanship for a period of one (1) year from the date of purchase.
During the warranty period, Fieldpiece Instruments will, at its option, replace or repair the defective unit.
This warranty does not apply to defects resulting from abuse, neglect, accident, unauthorized repair, alteration, or unreasonable use of the instrument. Any implied warranty arising out of the sale of Fieldpiece's products including but not limited to implied warranties of merchantability, and fitness for purpose, are limited to the above. Fieldpiece shall not be liable for incidental or consequential damages.
Service
Return any defective ST4 meter to Fieldpiece for warranty service along with proof of purchase. Contact Fieldpiece for out of warranty repair charges.
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