Overview Handheld High-Precision Digital Thermometer, based on 24-bit A/D converters and 16-bit MCU, features high precision, high stability, low power consumption, multiple input types, multiple measurement results, easy operation, etc. When suitable sensors are matched, it can be widely used for handheld precise temperature measurement and Ω/mV/mA precise measurement in production, scientific research and labs.
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Miscellaneous: Clear LCD layout, white backlight, Easy keypad operation and smart and exquisite appearance, Upper limit alarm and lower limit alarm can be set, User calibration is provided, Low power consumption; three AA alkaline batteries, 1,500 hours battery life(typical value, backlight off )...
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Specification Notes: 1) Based on ITS-90 ITS: The International Temperature Scale); the environmental ( condition: (23±5)℃, ≤85%RH; it should be put in the stable environmental conditions for at least one hour, wait 5 minutes after start-up, with the menu parameters of S_rAtE=1 and FILt=1, exclusive of sensor errors.
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(2) Resolution: The highest resolution: (3) Stability of Indicating Values: It is smaller than Δ/6 in a short period (10 minutes) and smaller than Δ/4 in a long period (8 hours). Notes: 1) The stability of indicating values means the fluctuation range of indicating values at a stable input, and is defined as a half of the value the maximum value minus the minimum value (i.e.
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(4)Sampling Rate: The sampling rate is set by the menu parameter S_rAtE. (5) Power Supply and Power Consumption: Three 1.5V AA batteries. The operating current is no more than 1.5mA when the backlight is shut off, and about 27mA when turned on. (6) Conditions for Application Environment: Ambient temperature : (0~50)℃, Ambient humidity :...
Input Wiring and Notes 1. Wiring for RTD and Ω type: The 4-wire connection is adopted, which is shown as F1 in the above drawing. Two wires on the left side of the plug are connected to one end of the RTD or resistance, and two wires on the right side of the plug are connected to the other end of the RTD or resistance.
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2. Wiring for DC mV signals: Pure copper conductor wires, plugs, connection lugs should be used for connection, which is shown as F2 in the above drawing. In order to minimize the influence of thermoelectric potentials, the surface feculences should be eliminated timely. The thermoelectric potentials for some materials and copper are as follows for reference.
Display Screen (1) REL/MAX/MIN/AVG/P-P/SN: Mathematic function, which respectively the relative value, maximum value, minimum value, average value, peak-peak value, standard deviation and sampling number. The standard deviation and sampling number have the same sign “SN”. (2) LOWBAT: This sign is displayed when the battery voltage is low; (3) AUTOOFF: The sign is displayed when the automatic shutdown is set.
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(7) 6-digital LCD display: Measurement values or prompt information; 4. Measurement offset/ sensor offset12 (8) Pt100 / Pt1000 / Cu50 / Cu100 / K / J / T / S / R / E / N / B: Type of RTD and thermocouples. The “type” of the Ω, mV and mA functions is itself, so respectively use their display units Ω, mV and mA as their function signs.
KeyPad Operation Keys are divided into three types including the short keys, long keys andcombination keys. Long keys or key combinations (keys should be pressed and hold for 2 seconds) are used to realize the functions of Set, Cancel, RJ or Cal, and short keys are used to realize other functions.
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(3) Key 1: in the measuring state, short press “Key 1” to switch display unit; press “Key 1” and hold it for 2 seconds to realize the “Set” function and enter menu settings. See “Menu Settings” at page 18 for details. (4) Key 2: 1) In the measuring state, short press “Key 2”...
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When the sampling number n exceeds 1 million times, the average value calculation will be suspended and the displayed AVG value remain the same f) P-P is the peak to peak value during measurement. It is equal to the peak to peak value for the measurement results since start-up (or after pressing “Cancel”), i.e.
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2) In the measurement state, long press “Key 2” holding it for 2 seconds until “――――――” is displayed in order to realize the clear (“Cancel”) function. The function refers to taking the current measurement value as the “reference value” for the new relative value, clearing all mathematic measurement results and restarting all mathematic measurement.
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(6) Key 4: 1) In the measurement state, short press “Key 4” for “HOLD” function, which means that the current measurement values and all mathematical measurement results remain unchanged until “Key 4” is short pressed again to deactivate the “hold” state. When exiting the menu, “HOLD”...
Menu Settings Long press “Key 1” (i.e. SET key) for 2 seconds to enter the menu. Once “Set” key is short pressed, the parameter name is displayed first, then if “Set” key is pressed again the parameter value will be displayed which can be modified with the keys of . Long press “Key 1”...
Menu Settings Description of Menu Parameters (1) Input Signal Type – tyPE: There are corresponding signs for thermal resistances and thermocouples. And the resistance /millivolt /milliampere ranges are signed with their units Ω/mV/mA respectively. In which, both tyPE=0 and tyPE=1 mean Pt100, and the main difference for the two types is that tyPE=0 is smaller measurement span but more stability than tyPE=1.
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(6)Automatic Backlight Shut-off Time - Auto.b.L: Its absolute value is the automatic backlight shut-off time (second), the automatic backlight shut-off function will be canceled in case of Auto.b.L=0, and the negative sign only means that the buzzer sound for key-press and alarm is not allowed. (7) Instrument Calibration Code - CAL.Cod: User calibration is allowed in case of CAL.Cod=808;...
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(10) The Upper and Lower Limit Alarm —LowEr.L and UPPEr.L: 1) The lower limit alarm value - LowEr.L: Once the measured value x is smaller than the set lower limit value LowEr.L, LOAL alarm will be generated immediately. After the LOAL occurs, only the measured increases to no less than (LowEr.L + alarm hysteresis error δ) can the LOAL alarm be released.
Calibration When the instrument exceeds the tolerance according to measurement verification or after repairing, user can perform calibration, and the factory calibration coefficient can be resumed if there are errors in the user calibration. User calibration includes instrument coefficient calibration and temperature error calibration for the interior reference ends.
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Calibration (2) Calibration Sequence: The sequence of “Ω→mV→mA” should be followed during calibration, and the error calibration for the interior reference ends should be carried out in the end. If some calibration point is skipped (Skip), then other relevant calibration point will be invalid or skipped.
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Calibration (4) Calibration for Errors of the Interior Reference Ends: Set CAL.Cod=808, and press “Key 2 + Key 4” for long to enter calibration. Place the instrument in the environment with stable temperature, set the type to the thermocouple with larger thermoelectric potentials (K thermocouple or E thermocouple is favorable and B thermocouple, S thermocouple or R thermocouple is not suitable), set 26 OFF.SEt = 0, set the compensation mode to the INT interior mode, connect the (class- ) thermocouple.
Description of Prompt Information (1) PrA.Err: There are errors for the setting of calibration parameters. During temperature calibration for the interior reference ends, this sign will occurs if the tyPE is not set to the thermocouple or INT compensation mode is not set, so please set the correct parameters and then recalibrate it;...
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Description of Prompt Information (12) rEF?: During temperature error calibration for the thermocouple’s interior reference ends, it is required that the real temperature value (plus the used thermocouple’s correction value, i.e. ℃ or mV value) of the constant temperature oven should be input. (13) OVEr: 3 events will display this message.
Accessories (1) One K-type class- thermocouple wire with plug. (-40℃~250℃) (2) One four-wire resistance measuring wire. (3) One mV/mA measuring wire with two-wire plug. Optional Accessories: Customized probes with different structure forms can be provided. (1) Precise platinum resistance probe: class-A, four-wire plug, with handle. (2) Precise thermocouple probe: K-type, class- , with handle.
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Warranty Certificate This is certify that, Dry Block Temperature Calibrator having Sr. No.-------------------- Date-------- is propery Tested for workmanship. We Certify our Calibrator for satisfactory performance for the period of one year from the date of supply against any manufacturing defect. Signature...
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