Instruction/ maintenance manual of the product UT325 Uni-T
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T able of Contents 4 7 8 10 12 16 16 17 17 18 18 18 19 19 19 20 21 Title Page Safety Information Getting Started Components Display Elements Buttons Using the Thermometer Changing Setup Options Enteri.
23 23 24 25 25 26 26 26 26 27 27 27 28 29 29 30 31 31 Title Page Measuring T emperatures Connecting a Thermocouple Displaying T emperatures Holding the Displayed T emperatures T urning on and off of d.
Maintenance Replacing the Battery Cleaning the Case Specifications Environmental General Electrical Title Page 32 32 32 33 33 33 33 Model UT321/322/323/325: OPERA TING MANUAL 3.
Safety Information The Uni-T rend Model UT321, UT322, UT323 and UT325 Thermometers (‘the thermometer) are microprocessor-based, digital thermometers designed to use external J-, K-, T -, E-, R-, S- and N- type thermocouples (temperature probes) as temperature sensors.
Refer to safety information in T able 1 and the international symbols in T able 2. T able 1. Safety Information Before using the thermometer inspect the case. Do not use the thermometer if it appears damaged. Look for cracks or missing plastic. Pay particular attention to the insulation around the connectors.
Caution A caution identifies conditions and actions that may damage the meter or the equipment under test. Use the proper thermocouples, function, and the range of your thermometer . When carrying two thermocouples measurement, make sure there are no potential differences between two thermocouples.
Getting Started Everything in this Users Manual applies to all Models of UT321, UT322, UT323 and UT325 unless otherwise indicated. T o become familiar with the thermometer , study the following: Figure 1 and T able 3 describe the components Figure 2 and T able 4 describe the display .
Figure 1. Components Model UT321/322/323/325: OPERA TING MANUAL 8.
T able 3. Components Display Buttons Thermocouple T1 input Thermocouple T2 input (UT323 and UT325 only) USB Port SIGN Port - Over Limit Signal Output (UT323 and UT325 only) NTC Battery Door 9V battery.
Model UT321/322/323/325: OPERA TING MANUAL 10.
T able 4. Display Elements Setup is in progress when the icon blinks Display readings of maximum, minimum and average Data T ransferring is in progress Logged readings are displayed when the icon blinks Low battery . Replace the battery The thermocouple type The temperature units Secondary Display 1 Under Calibration mode when the icon blinks.
Figure 3-a UT321 and UT323 buttons set Model UT321/322/323/325: OPERA TING MANUAL 12.
Figure 3-b UT322 and UT325 button set Model UT321/322/323/325: OPERA TING MANUAL 13.
T able 5. Buttons Press to turn the thermometer on or off Press to turn the display backlight on and off. Press to freeze or unfreeze the displayed readings Press to switch between Celsius (ºC), Fahrenheit(ºF), and Kelvin (K) Press to step through the maximum, minimum, and average readings.
Press to start or exit Setup. Press to scroll the Setup option you want to change (See “Changing Setup Options”) After entering the Setup mode, press to increase the displayed setting. (See “Changing Setup Options”) After entering the Setup mode, press to decrease the displayed setting.
Using the Thermometer 1) Plug the thermocouple(s) into the input connector(s). 2) Press the power button to turn on the thermometer . 3) Set the type of thermocouple(s) to be same of the type plug into the input connector(s).
When the thermometer is in Setup mode, the display shows and blinks SETUP . Press SETUP to start or exit Setup. Press SETUP to scroll the Setup option you want to change after The logging interval determines how often the thermocouple stores logged readings in memory .
1. Press SETUP until the display shows TYPE. 2. Press or to select the thermocouple type you want including K-, J-, E- type (UT323 and UT325 have extra R-, S- and N- type). 1. Press SETUP until the display shows OFFSET and T1 2. Press or until the display shows the correct reading.
Model UT321/322/323/325: OPERA TING MANUAL 19.
Model UT321/322/323/325: OPERA TING MANUAL 20.
Below table shows the measuring range of each type of thermocouple K type: -200.0ºC to +1372ºC (-328.0 ºF to +2501 ºF) J type: -210.0ºC to +1200ºC (-346.0 ºF to +2192 ºF) T type: -250.0ºC to +400.0ºC (-418.0 ºF to +752.0 ºF) E type: -150.0ºC to +1000ºC (-238.
For example: The maximum reading of the high alarm of K type is +1372ºC. The minimum reading of the high alarm of K type is either the low alarm reading plus 1 or -200ºC. Below table shows the measuring range of each type of thermocouple K type: -200.
Model UT321/322/323/325: OPERA TING MANUAL 23.
Model UT321/322/323/325: OPERA TING MANUAL 24.
Measuring T emperatures Thermocouples are colour coded by type based on the North American ANSI Colour Code: T ype Colour T ype Colour J Black R Green K Y ellow S Green T Blue N Orange E Purple 1. Plug a thermocouple into the input connector(s). 2. Set the thermometer for the correct thermocouple type.
1. Press ºC ºFK to select the correct temperature scale. 2. Hold or attach the thermocouple(s) to the measurement location. The temperature reading appears in the selected display 1. Press HOLD to freeze the readings on the display . The display shows HOLD.
Use the offset option in Setup to adjust the thermometer’s readings to compensate for the errors of a specific thermocouple. 1. Plug the thermocouple into the input connector . 2. Place the thermocouple in a known, stable temperature environment (such as an ice bath or a dry well calibrator).
After entering the Debug mode, you can self-debug. Below is the procedure: K- and J- type: -180ºC, 0ºC and 900ºC T type: -180ºC, 0ºC and 400ºC E type: -140ºC, 0ºC and 900ºC R- and S- type: 0ºC and 1200ºC N type: -180ºC, 0ºC and 1200ºC Remark: 0ºC only need to debug k type.
Remark: The corresponding table between temperature and voltage refer to BS EN 60584- 1:1996. Before carrying out debug, to ensure your standard source has enough accuracy . It is at your own responsibility , if the thermometer has too big accuracy deviation is caused by the standard source does not have enough accuracy .
display 1 shows the logged reading. Each presses of ENTER will automatically store the logged readings in the next memory location. Press or could change the memory location, the empty location shows “- - - - - ”. 5. If you selected an auto logging interval, set the logging interval not 00:00.
1. Press STORE to enter logging mode, the display shows DA T A and blinks. 2. Press and hold down STORE 2 seconds, the display shows CLR. 3. Press ENTER to delete all the logged readings from memory . It is not possible to delete the logged readings one by one.
Maintenance Replace the batteries as soon as the battery indicator appears. The possibility of false readings can lead to personal injury . 1. T urn off the thermometer . 2. Loosen the screw and remove the battery door . 3. Replace 1 piece of 9V battery (6F22).
Specifications Operating T emperature Storage T emperature Humidity -10ºC to 50ºC (14ºF to 122ºF) -40ºC to + 60ºC (-14ºC to +140ºC) Non condensing <10ºC (<50ºF) 95% RH: 10ºC to 30ºC .
Function UT321 UT322 UT323 UT325 Input Protection T ype Input Measurement Range Display Resolution Measurement Accuracy K, J, T , E K, J, T , E, R, S, N T1 T1, T2 T1 T1, T2 K type: -200.0ºC to +1372ºC (-328.0 ºF to +2501 ºF) J type: -210.0ºC to +1200ºC (-346.
Function UT321 UT322 UT323 UT325 Input Protection Measurement Accuracy 30V Below -10ºC: add 0.5ºC Below -200ºC, add +2ºC T ype T Below -200ºC: for reference only .
** END ** Accuracy is specified for ambient temperatures between 18ºC(60ºF)and 28ºC (82ºF) for a period of 1 year , operating temperatures: -10ºC ~ 50ºC (14ºF ~122ºF). The above specifications do not include thermocouple error ,probe tolerance is not included in above technical index.
Copyright 2008 Uni-T rend Group Limited. All rights reserved. Manufacturer: Uni-T rend T echnology (Dongguan) Limited Dong Fang Da Dao Bei Shan Dong Fang Industrial Development District Hu Men T own, .
An important point after buying a device Uni-T UT325 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Uni-T UT325 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Uni-T UT325 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Uni-T UT325 you will learn all the available features of the product, as well as information on its operation. The information that you get Uni-T UT325 will certainly help you make a decision on the purchase.
If you already are a holder of Uni-T UT325, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Uni-T UT325.
However, one of the most important roles played by the user manual is to help in solving problems with Uni-T UT325. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Uni-T UT325 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
