To protect your METTLER TOLEDO product‘s future: METTLER TOLEDO Service assures the quality, measuring accuracy and preservation of value of all METTLER TOLEDO products for years to come. Please send for full details about our attractive terms of service. Thank you. *P11780209* Subject to technical changes and to the availability of the accessories supplied with the instruments. © Mettler-Toledo GmbH 1998 11780209A Printed in Switzerland 9807/2.
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Key «Re-Zero», «Set», «On/Off» Key «0.1/0.
Operating instructions METTLER TOLEDO AT balances 1 Your AT balance is distinguished primarily, however, by its user friendliness. You set the balance up, connect it to the power supply and after a few minutes warm-up time you can immediately start weighing. You thus obtain your first weighing result in the shortest time possible. The AT smooths the way 1.1 The new weighing feeling Your AT balance offers a wide range of functions, yet is simple to operate.
2 1.2 Preparing your AT If you fold out the front fold-out, you have in front of you an immediate overview of all general illustrations at a glance. You need undertake the following operations only on first-time installation and each time you change the balance location. - Firm, vibration-free location, as level as possible - No direct sunlight - No extreme temperature fluctuations - No excessive drafts (e.g.
Operating instructions METTLER TOLEDO AT balances Mount the draft cover and level the balance How you can transport the balance When you position your AT balance at its location, please note the following: - Place the draft cover 16 supplied separately in position. When positioning the draft cover, ensure that it is not touched by the weighing pan, which must move freely in its recess. If necessary, turn the weighing pan to the correct position.
4 Connect your AT to the power supply Prepare the glass draft shield The draft shield of your AT balance comprises several parts which can be combined in a number of ways using the coupling elements. To preclude transport damage, these coupling elements are not locked in position when shipped. Connect the individual parts of the draft shield as follows: - Pull all doors of the draft shield and the opposing door holder 14 forwards as far as possible.
Operating instructions METTLER TOLEDO AT balances METTLER TOLEDO 1.3 Weighing made simple AT201 Max 205 g d = 0.1 mg pro FACT METTLER TOLEDO Configuration Print Menu Select 1 - - Set your balance to zero (taring): Cancel 0.1/0.001 mg Select 2 By pressing the «On/Off» key you switch your AT from standby to the weighing mode. The balance now performs a brief self-test and all display segments light up briefly. χ ⇔ pro FACT χ ⇔ Max 205 g d = 0.
6 As soon as the warning beep sounds, zeroing of the balance is complete and the fully automatic door function opens the draft shield. 0.0000 METTLER TOLEDO - Print ⇔ Select 2 - 5.34678 g Load the weighing sample and press the «Print» key. The fully automatic door function closes the draft shield. On/Off AUTOCALIN The triangle symbol (print symbol) and the circle symbol of the stability detection (ASD) appear in the display.
Operating instructions METTLER TOLEDO AT balances keystroke. Section 5.4 shows you how to trigger the adjustment yourself. - STANDBY Some additional tips: For switching off the balance, lift up the «On/Off» key briefly from below. This closes the draft shield automatically if the fully automatic door function is switched on. Otherwise, close the draft shield manually to prevent the ingress of dust and dirt. After being switched off, the balance is on standby.
8 - If you ever have to disconnect your AT from the power supply, first switch it off by lifting up the «On/ Off» key. After the balance has been reconnected, it is in the standby mode and “STANDBY” appears in the display. 2 Your AT - a balance with extreme ease of operation After an unexpected power outage, however, or if you have not switched off your AT before disconnecting it from the power supply, when power is restored again “–OFF–” appears in the display.
Operating instructions METTLER TOLEDO AT balances When small weighing samples have to be loaded, we advise you to open only one of the two side doors. Your balance then operates quicker since the disturbing air currents are less than when more doors of the draft shield are open. You can operate the draft shield manually in the traditional manner. The draft shield of the AT balance has no fixed bars and the weighing chamber is freely accessible.
10 Max 205 g d = 0.01 mg Pro FACT METTLER TOLEDO Cancel 0.1/0.01mg Configuration Menu Print ⇔ ⇔ Select 2 ⇔ Select 1 Set On/Off The semiautomatic operation can be effected either with the left or the right key. In this case, the draft shield is opened and closed by the motor. ⇔ AT201 In certain applications, such as zeroing (taring) of the balance, the draft shield opens and closes fully automatically as you already know from your first weighing.
Operating instructions METTLER TOLEDO AT balances 24.083 98.215 2.2 The DeltaTrac® - an informative display 2.3 Is your AT a DeltaRange® balance? The DeltaTrac® 28 is a supplement to the digital display 25. It provides you with a pictorial representation of the weighing range in use and that still remaining. The dynamics of a weighing process can be followed on the DeltaTrac® extremely well. Simply observe the DeltaTrac® during a weighing and you will immediately understand its function.
12 Note: This ten times more accurate movable fine range also remains active in differential weighing. 2.4 How you can weigh in the coarse and fine range Semimicro and DeltaRange® balances of the AT series are equipped with a switch key which you can use to switch from the coarse range to a ten times more accurate fine range. The AT thus allows you to work in the range best suited to your needs.
Operating instructions METTLER TOLEDO AT balances You have the following selectable ranges available: AT201 Max 205 g d = 0.01 mg - Press the «0.1/0.01 mg» key (e.g. with AT201/AT261 DeltaRange®) and … - …the balance operates in the ten times more accurate fine range. - By pressing the «0.1/0.01 mg» key again, you can return to the coarse range. Pro FACT Cancel 0.1/0.01mg Configuration Fine range Key Menu Select 1 ⇔ Balance Coarse range Set AT20 0.01 mg 2 µg 10 / 2 µg AT201 0.1 mg 0.
14 Overview of the menu functions: - reference weight in % - reference weight in pieces - adjustment - weighing process adapter - vibration adapter - fully automatic door function You will find a detailed overview of the menu on pages 82 and 83. Your AT is an adaptable balance For the optimization of your weighing results and adaptation to your weighing needs, the AT offers you additional setting options. You undertake these adaptations in the menu, which you will now be introduced to.
Operating instructions METTLER TOLEDO AT balances «Set» key You perform your weighings in the weighing mode, the operational mode of your balance. Weighing mode and menu are separate. By pressing and holding the «Configuration» key you can call up the configuration register. You can also select the different menu options and setting possibilities with keystrokes. AT201 Max 205 g d = 0.01 mg Cancel 0.1/0.01mg Menu ⇔ Select 1 Set Pro FACT AT201 Max 205 g d = 0.01 mg Cancel 0.1/0.
16 By repeated pressing of the «Menu» key, all available menu options appear in the display in succession: A complete overview of the menu can be found on the pages 82 and 83.
Operating instructions METTLER TOLEDO AT balances In the following 3 sections you will get to know the three menu options (weighing process adapter, vibration adapter and automatic door function) in detail. The additional setting options for special applications (weighing in reference weights for percent weighings or piece counting and the adjustment) will be introduced in Section 5. 3.
18 This is the universal setting suitable in principle for all types of weighing. This setting is preset in the factory. In this position the drop symbol is invisible, the weighing process adapter is switched off. This setting is suitable only for special applications in which not only the final result but also the dynamics of the weighing process are of interest, for example the recording of weight changes due to evaporation against time.
Operating instructions METTLER TOLEDO AT balances With the so-called vibration adapter your AT balance can be matched in the menu to the local conditions. 3.3 How to adapt your AT to the local conditions For all weighings, we advise you always to open the draft shield only as far as necessary. You thus achieve stable weighing results as quickly as possible. AT201 Max 205 g d = 0.01 mg Pro FACT - Select the menu.
20 This setting is suitable for normal ambient conditions; the balance operates at moderate speed in this case. This position is set in the factory. This setting is suitable for work in unquiet surroundings. The balance operates more slowly, but is less sensitive to external disturbances. This setting is suitable for very quiet and stable surroundings. The balance operates very rapidly, but is relatively sensitive to external disturbances. AT201 Max 205 g d = 0.01 mg Cancel 0.1/0.
Operating instructions METTLER TOLEDO AT balances work is particularly facilitated by this automatic operation. It is also useful in the percent weighing (Section 5.2) and piece counting (Section 5.3) applications. When the twin foot switch (see brochure is used, the automatic operation leaves both hands free for weighing in. AT201 Max 205 g d = 0.01 mg - Select the menu. - Press the «Menu» key repeatedly until the adjacent display appears.
22 Fully automatic door function switched on 4 Additional possibilities with your AT door Auto door Std AT201 Max 205 g d = 0.01 mg Cancel 0.1/0.01mg Configuration Menu ⇔ Select 1 Pro FACT - Fully automatic door function switched off In addition to the menu, the AT offers you further, very specific adaptation possibilities. You perform these adaptations in the configuration register, which we will introduce you to in the following section.
Operating instructions METTLER TOLEDO AT balances Unit Int -FACE - Weighing units weighing unit 1 weighing unit 2 status indicator beeper 4.2 How is the configuration register used? Hold the short-form operating instructions in your hand. You will then have the complete configuration register at a glance in front of you. - Interface data transmission mode data transmission rate parity transmission protocol end-of-line mode You will find further details on the adjustment parameters on pages 82 and 83.
24 Max 205 g d = 0.01 mg Pro FACT METTLER TOLEDO Cancel 0.1/0.01mg Configuration Print Menu Select 1 ⇔ ⇔ ⇔ Select 2 Set On/Off By pressing and holding the «Configuration» key, you call up the configuration register. You select the different - sectors («Configuration» key) - parameters («Select 1» key) - settings («Select 2» key) by simply pressing the appropriate key. In contrast to the menu, you also need the «Select 2» key for operation of the configuration register. AT201 Max 205 g d = 0.
Operating instructions METTLER TOLEDO AT balances «Cancel» key AT201 Max 205 g d = 0.01 mg Cancel 0.1/0.01mg Configuration Menu ⇔ Select 1 Set 2400 bd A further tip: Pro FACT Exit the configuration register and return to the weighing mode without any changes being stored. If you have made a wrong selection, you can quit the configuration register at any time by pressing the «Cancel» key. You are then again in the weighing mode without any setting having been altered.
26 4.3 In the first sector you return to the factory settings As you have learned in the preceding section, the configuration register of your AT balance has been preset in the factory. Even if you have modified the settings, you can return to the factory setting at any time. - Select the configuration register by pressing and holding the «Configuration» key. As soon as the display shown opposite appears, release the key. - You are now in the first sector (Settings) of the configuration register.
Operating instructions METTLER TOLEDO AT balances the limits selected by you for the stability. 4.4 The second sector offers you numerous adaptation possibilities Select the configuration register by pressing and holding the «Configuration» key. Then select the second sector (basic settings) by pressing the «Configuration» key briefly. You have a choice of eight settings. In the setting ASd–1– the display must be within a preset tolerance limit for one second for the result to be released as stable.
28 Stage Weighing speed Repeatability d In this parameter you define the readout increments (digits) for the last decimal place. Readout increments of 1, 2, 5 and 10 are available, and these are symbolized by the following setting options: off very fast 1 2 3* 4 5 6 7 Readability (selection of the readout increments) good AT20 fast 0.01 mg* 0.02 mg 0.05 mg 0.1 mg very good 0.1 mg* 0.2 mg 0.
Operating instructions METTLER TOLEDO AT balances Here you define the readout increments (digits) for the last decimal place in weighings in the fine range. Readout increments of 1, 2, 5 and 10 are available, and symbolized by the following setting options: AT20 2 µg* 5 µg 10 µg 0.1 mg AT201 / AT261 DeltaRange® AT460 DeltaRange® 0.01 mg* 0.02 mg 0.05 mg 0.1 mg 0.1 mg* 0.2 mg 0.5 mg 1 mg Autozero (AZ) AZ In this parameter you switch the automatic zeroing (autozero) on or off.
30 CALIN Adjustment and linearization with proFACT proFACT professional fully automatic adjustment and linearization technology In this parameter you define the adjustment mode i.e., the way in which your balance should be adjusted and linearized. The following possibilities are available: CALIN Auto on The AT balance adjusts and linearize itself fully automatically by loading two internal adjustment weights.
Operating instructions METTLER TOLEDO AT balances - In this mode you can also initiate the fully automatic adjustment and linearization at any time with a keystroke. This is practical, for instance, when your AT reports during a weighing that it wishes to adjust itself. Section 5.4 shows you how to proceed in such a case. CALIN USEr You use your own, external adjustment weight for the adjustment. The procedure is described in Section 5.4 of these operating instructions.
32 dwt ct C.M. mo 4.5 In the third sector you select the weight units and additional settings * = factory setting Select the third sector (weight units) in the configuration register. Unit The number of decimal places in each unit is dependent of the balance model. In this sector you can select the following parameters and their settings: By pressing the “ key, you toggle between weight unit 1 (Unit 1) and weight unit 2 (Unit 2). Section 5.
Operating instructions METTLER TOLEDO AT balances With the «Select 2» key you can now select the desired national tael unit: Weight unit 2 Unit 2 û You have available the same weight units as with weight unit 1 and also the application units piece and percent: Hong Kong (factory setting) HONg Display Name S9P NAL g mg* oz ozt tl gram milligram ounce Troy ounce tael (see note Tael under weight unit 1) grain pennyweight carat, metric carat, metric (GB) momme pieces pieces (German) percent Singapore,
34 By pressing the key “, you toggle between weight unit 1 (Unit 1) and weight unit 2 (Unit 2). You will find further details in Section 5.1. A conversion table for the weight units is given in Section 7.6. - The symbols are displayed permanently. on * = factory setting Beeper setting The application units «piece» and «percent» are described in detail in Sections 5.2 and 5.3.
Operating instructions METTLER TOLEDO AT balances Data transmission mode 4.6 In the fourth sector the AT reveals itself as a balance ready to communicate Int-FACE S. Select the fourth sector in the configuration register (interface). The following setting options are available: - Send stable: The first stable value is transferred after initiation of the print command after release by the automatic stability detection.
36 - Important note: If you have switched off the automatic stability detection in sector 2 (ASD oFF), all weight values are regarded as being stable. After the «Print» key has been pressed in this case, the following values are transmitted: 150 db 300 db 600 bd 1200 bd 2400 bd * 4800 bd 9600 bd * = factory setting In setting S.Stb: The current value as in the setting S.ALL. Parity In setting S.Auto: The first value after a weight change of more than 0.01 g.
Operating instructions METTLER TOLEDO AT balances - Parity Off - No handshake - Hardware handshake (DTR/CTS) - Software handshake (XON/XOFF) HS oFF PAr oFF - Parity Space PAr SPc HS HArd * = factory setting HS Soft Transmission protocol (HandShake) HS HS PAUSE These settings allow matching of the data transmission to various serial receivers.
38 Important note: Proceed as follows for the printout: METTLER TOLEDO - Select the configuration register. - Press the «Print» key, and the current configuration will be printed out. Print Select 2 ⇔ If HS CL is set in the transmission protocol, the end-of-line mode is set automatically to EOL crLF and can not be changed. On/Off 4.7 Print out the current configuration You can print out the configuration currently stored on an attached printer.
Operating instructions METTLER TOLEDO AT balances 4.8 How to protect your settings against inadvertent change As you know, with one press of the «Set» key your individual settings in the configuration register are stored. These are available at any time (even if the balance has since been disconnected from the power supply). You are not, however, protected against inadvertent alterations, for instance by other balance users.
40 If you have secured your settings, the configuration register is no longer accessible and no more alterations can be made. - 5 Special applications and functions of your AT balance To remove the safeguard, proceed in the reverse sequence. Your AT balance is also prepared in the best possible way for special cases. Applications and functions built in as standard expand the possibilities of your AT balance and facilitate the operation.
Operating instructions METTLER TOLEDO AT balances You have, for example, selected “mg” as weight unit 1 and “ct” as weight unit 2 in the configuration register. You can switch between these two units at a keystroke: 68.4 µ 5.2 Your AT also weighs in percent and shows plus/ minus deviations This built-in application allows you to weigh in to a preset value (100%) and to determine deviations from this target value. The balance is now operating with weight unit 1.
42 - - Open the draft shield and load the reference weight. -2.5% 100% +2.5% Press the «Set» key and the draft shield closes automatically if the automatic door function is switched on. If not, close the draft shield manually or by pressing one of the two keys and then press key «Set». ⇔ - The DeltaTrac® now shows a plus and a minus marking that displays the tolerances of plus and minus 2.5%.
Operating instructions METTLER TOLEDO AT balances 67.40 % coarse indicator fine indicator % 100.00 If you possess a dual-range balance (semimicro balance), you also have a fine range available in the weight unit %, in which additional decimal places are displayed. With the key “ you can display either the percentage or the weight (see also Section 5.1). Now perform the fine weighing: - 98.
44 Pro FACT Open the draft shield manually or by pressing one of the two keys . Cancel 0.1/0.01mg AT201 pro FACT Max 205 g d = 0.1 mg METTLER TOLEDO Configuration Set the scale to zero (taring). - Your AT now needs the weight of a reference piece number. Press the «Menu» key briefly. Print Menu Select 2 χ ⇔ Select 1 Set Configuration - Cancel 0.1/0.001 mg χ ⇔ Max 205 g d = 0.01 mg ⇔ AT201 Re-Zero METTLER On/Off Menu ⇔ Select 1 Set Pro FACT AT201 Max 205 g d = 0.
Operating instructions METTLER TOLEDO AT balances 10 SEt 10 PCS SEt 20 PCS SEt 50 PCS 50 100 - If you wish to count out of a container, remove the selected number of pieces from the container. - Press the «Set» key, and the draft shield closes automatically if the automatic door function is switched on. If not, close the draft shield manually or by pressing the righthand key and then press the «Set» key.
46 - As soon as the horizontal dashes disappear, the reference piece number and the reference weight have been read in and your AT is ready for counting or weighing. With the key “ you can display either the piece count or the weight (see also Section 5.1). 5.4 How to trigger the adjustment manually If the automatic door function is switched on, the draft shield opens automatically on completion of the weighing-in process. If not, open it yourself.
Operating instructions METTLER TOLEDO AT balances You select the adjustment mode in sector 2 (SCALE) of the configuration register (see Section 4.4). In addition to the fully automatic self-adjustment, you have two further adjustment possibilities available: CALIN - Auto off CAL USEr - If you have switched off the automatic self-adjustment, you should adjust the balance occasionally.
48 Max 205 g d = 0.01 mg Pro FACT Cancel 0.1/0.01mg Configuration Menu ⇔ Select 1 Manual adjustment with external adjustment weight You wish to use your own external adjustment weight for the adjustment and have set the parameter proFACT (adjustment and linearization) to «CAL USEr» in sector 2 of the configuration register (basic settings). In this mode the automatic adjustment and linearization with the built-in adjustment weights is switched off.
Operating instructions METTLER TOLEDO AT balances CALIN 200.0000 CALIN After a short time, the audio warning beep sounds and the requested, model-dependent adjustment weight appears in the display, for example, 200 g. - Open the draft shield, load the requested adjustment weight and close the draft shield. - Wait until the audio warning beep sounds. The display now requests the removal of the adjustment weight. - Open the draft shield, remove the adjustment weight and close the draft shield.
50 AUTOCALIN - CAL Int Repeatedly press the «Menu» key briefly until the adjacent display appears. Note: This display does not appear if you have set the parameter “adjustment and linearization” to CAL USEr in the configuration register (adjustment with your own external adjustment weight). Please also see the note at the end of this section. CAL tESt - 0.0000 Select the adjustment test by pressing the «Select 1» key. Start the test by pressing the «Set» key.
Operating instructions METTLER TOLEDO AT balances 5.6 How to print out the weighing result - As soon as the result is stable, it is transferred via the interface connection 19 to the printer. Up to the transmission, the triangle symbol is lit up in the display. If the transmission has not yet taken place, you can abort the procedure by pressing the «Print» key again briefly.
of the two - ⇔ 52 keys. The transmission command can also be triggered with the hand or foot switch (available as an accessory). 5.7 Your AT can also be remote controlled The complete operation (keypad and draft shield) as well as the menu and the configuration register of your AT balance can also be controlled via a computer. This allows you to incorporate your AT in an automation system and, for instance, is also suitable for loading by a robot.
Operating instructions METTLER TOLEDO AT balances 6 Note: Owing to the heat developed by the AC adapter, this type of installation is not advisable with semimicro balances (resolution 0.01 mg). Important information regarding your AT balance 6.1 The AC adapter offers you various installation options - Remove the two fastener screws at the rear of your AT balance. - Attach the AC adapter holder supplied to the rear of the balance with the two screws.
54 - Position the four feet in the slots of the AC adapter. Hold the connection cable to the right and it slides into the central slot of the holder automatically. - Connect the AC adapter first to connection socket 23 of the balance and then to the power supply. Note: You can attach the AC adapter such that the power cable exits at the right. - Press the AC adapter gently downward the stop.
Operating instructions METTLER TOLEDO AT balances - - Drill the holes and use the dowels in the installation set supplied should the wall material require it. Fix the AC adapter holder such that the arrow is visible and pointing upward. Hold the unit so that the connection cable exits from the top and position the four feet in the slots in the holder. Hold the connection cable to the right while doing so and it will slide into the central slot of the holder automatically.
56 touch the draft cover. If necessary, turn the weighing pan to the correct position. 6.3 A well maintained balance is a joy forever - Clean the weighing pan, the draft shield and the housing of your AT occasionally with the brush supplied. ⇔ If, for example, you wish to clean the base inside the draft shield at the left, start with the brush from the right or from the top through the weighing chamber and at the same time open the left door with the left hand.
Operating instructions METTLER TOLEDO AT balances 6.4 What your AT brings with it 6.5 Additional information and accessories for your AT balance The following accessories are supplied with your AT: - AC adapter with holder and installation set - Operating instructions - Short-form operating instructions - “Weighing the right way” - Cleaning brush - METTLER TOLEDO weighing tweezers (for semimicro balances only) For below-the-balance weighings your AT is equipped with an opening for a hanger.
58 7 - Any questions? 7.1 What happens if the weight display is unstable? Look for a suitable location, adapt the vibration adapter to the local conditions (see Section 3.3) and close the draft shield as fully as possible (see Section 2.1). An insufficiently closed draft shield Since it is not always easy to determine the exact cause of an unstable display the most frequent sources of error are listed below. You will find detailed explanations in the enclosed booklet “Weighing the right way”.
Operating instructions METTLER TOLEDO AT balances - Weighing samples or containers that are not at ambient temperature In the simplest case, it may be sufficient to remove the draft cover 16 and place the weighing sample in a metal container. Weighing samples or containers that are warmer or colder than the ambient temperature of the balance can cause disturbing air currents and buoyancy errors. Weight changes due to the uptake or evolution of surface moisture can also be the cause.
60 Weighing samples or containers that absorb or evolve moisture readily All weighing samples or containers made of wood, cardboard, paper, cork (e.g. holder for round-bottomed flasks), plastic or rubber can absorb or evolve enough moisture to make the display unstable and cause display of nonreproducible or wrong weighing results. - If at all possible, containers made of such material should be replaced by metal or glass vessels.
Operating instructions METTLER TOLEDO AT balances The weighing process adapter is switched off Vibration adapter If the local conditions allow (see Section 3.3), you can shorten the stabilization time of your AT by setting the medium or small wave symbol of the vibration adapter. Changing the setting of the vibration adapter by one step causes your AT to react around a third faster.
62 Automatic stability detection Your AT achieves stability quicker if you reduce the stability detection. If you select, for example, stage 1(ASD –1–) instead of stage 6 ( ASD –6– ), the balance releases the weighing result as stable decidedly more quickly (see Section 4.4). Glass draft shield, Inner draft shield Your AT operates faster if you open the draft shield to load the balance only as much as necessary.
Operating instructions METTLER TOLEDO AT balances AUTOCALIN 68.4325 …during a weighing the audio warning beep sounds and the adjacent symbol appears in the display? - – AUTOCALIN – -OFF- If the fully automatic self-adjustment is switched on (see Section 4.4), your AT shows that it wishes to adjust itself (AUTOCALIN = Automatic Calibration and Linearisation). But there is no need for you to interrupt your work for this.
64 …the display shows overload or underload? - - Overload is displayed when the weight of the loaded weighing sample is larger than the weighing range. Underload is displayed when the weighing range is not reached. This applies when the weighing pan is missing, or the weighing pan touches the draft cover and no longer has unrestricted movement. In this case switch the balance off, position the weighing pan correctly and then switch your AT on again. …the display “0.0000” flashes? 0.
Operating instructions METTLER TOLEDO AT balances …the balance returns automatically from the menu or the configuration register to the weighing mode? 68.4325 …the triangle symbol appears in the display? - - You have selected the menu or the configuration register and not pressed a key for 1 minute. Your AT thus assumes that you do not wish to make any changes and returns to the weighing mode. You have pressed the «Print» key.
66 7.4 What does this error message mean? - Error messages in the display draw your attention to faulty operation, namely that the balance was not able to perform a procedure properly. Error messages are supported by an audio signal (“twitter”). No reference weight has been loaded. - A wrong reference weight has been loaded. - The balance returns automatically to the weighing mode.
Operating instructions METTLER TOLEDO AT balances Err. unStb Err tiNE Fault in the adjustment - - The adjustment procedure of the balance has been disturbed. The corresponding procedure is aborted automatically and the balance returns to the weighing mode. - The adjustment is automatically aborted and the balance returns to the weighing mode. 7.5 What does this term mean? The wait time of 1 minute has run out We have “translated” the most important technical terms for you.
68 Ambient conditions Local conditions at the location of the balance. The following local conditions can lead to display errors during weighing: unsuitable location, changes in the temperature, atmospheric humidity or the atmospheric pressure, magnetic fields, electrostatic forces, vibrations, drafts caused by air conditioning. Section 7.1 Analytical balance Balance with a readability of 1 d (1 digit) = 0.1 mg. Analytical range Weighing range with a readability of 1 d (1 digit) = 0.1 mg. Section 2.
Operating instructions METTLER TOLEDO AT balances Autozero Automatically corrects the zero display if drifting occurs or the weighing pan is contaminated. Section 4.4 Configuration The sum total of all settings selected for the parameters in the configuration register. Section 4 Baud rate See “Data transmission rate”. Configuration register Register with tree-like structure in which operational settings, weight units and much more can be matched to the needs of the user.
70 Data transmission rate Specifies the rate at which the data are transferred. Also called baud rate: 1 baud = 1 bd = 1 bit/second. Section 4.6 Digit Display unit; a digit corresponds to a display increment of the last decimal place. - DeltaRange® balance Balance with a fine range recallable at any time over the entire weighing range. Section 2.4 DeltaTrac® Dynamic graphic indicator with 60 radial indicators. Displays the used and remaining weighing range.
Operating instructions METTLER TOLEDO AT balances Door drive handle Device which allows motorized opening of the draft shield. Section 2.1 Foot switch Available as an accessory in single or twin versions. Control element for zeroing (taring) the display, for triggering the data transmission («Print» key) and for operation of the automatic door function of the draft shield. Frees both hands for operations.
72 Jumper Safety device in the program cassette. Rearrangement of contacts blocks the configuration register and thus protects the stored settings against inadvertent change. Section 4.8 LCD Liquid Crystal Display. Display which does not itself light up but reflects the ambient light. Front fold-out Level Device which facilitates the horizontal alignment of the balance. Operates on the principle of a spirit level with an air bubble in a liquid. See also “Leveling”. Section 1.
Operating instructions METTLER TOLEDO AT balances Parameter Part of a sector in the configuration register. Each of the four sectors of the AT contains parameters (e.g. automatic stability detector, readability, etc.). Section 4 and pages 82 and 83 proFACT Fully automatic adjustment and linearization with two internal weights when necessitated by the operating conditions. proFACT: professional Fully Automatic Calibration Technology. Section 4.4 Parity Checking information in the data transmission.
74 Reference weight Representative reference weight. Needed among other things for the performance of percent weighings and piece counting. - In percent weighings. Reference weight = 100% In piece counting: Reference weight = weight of the reference piece number Sections 5.2 and 5.3 Repeatability Consistency of the weighing result in several repetitions on the same balance with the same weighing sample and under identical weighing conditions.
Operating instructions METTLER TOLEDO AT balances Self-test After connection to the power supply, the balance automatically performs a test of its functions. Section 1.3 Stabilization time Also known as weighing speed. It is defined as the time between the loading of the weighing sample on the weighing pan and the attainment of stability of the weight display (see also “Automatic stability detection”).
76 Status indicators Symbols that show the most important settings (vibration adapter, weighing process adapter). The symbols can be displayed permanently or for just a few minutes after switching on the balance. Section 4.5 Tare weight Weight of a container, vessel or the packing that should not be taken into account in the weighing. Section 1.3 Target weight See “Reference weight”. Taring Compensation of tare weights, i.e. setting the display of the balance with loaded tare weight to zero.
Operating instructions METTLER TOLEDO AT balances Weighing process adapter Possibility to adapt the balance to special types of weighing; set in the menu. Section 3.2 Weighing speed See “Stabilization time”. Weight unit Unit (e.g. g, mg, oz, etc.) that can be selected in the configuration register. Section 4.5 Zeroing See “Taring” and “Re-Zero”.
78 7.6 How are weight units converted? The following table will facilitate the conversion between the weight units available for the AT . Gram g Milligram mg Carat ct/C.M. (metr.) koil Ounce oz (avdp) Troy Ounce ozt Pennyweight dwt 1g = 1 1000 5 0.03527396 0.03215075 0.6430149 1 mg = 0.001 1 0.005 0.0000352740 0.0000321508 0.000643015 1 ct/C.M. = 0.2 200 1 0.007054792 0.006430150 0.1286030 1 oz = 28.34952 28349.52 141.7476 1 0.9114585 18.22917 1 ozt = 31.
Operating instructions METTLER TOLEDO AT balances Grain GN Tael tl (Hongkong) Tael tl (Singapur) (Malaysia) Tael tl (Taiwan) Momme mo 1g = 15.43236 0.02671725 0.02645547 0.02666667 0.2666667 1 mg = 0.01543236 0.0000267173 0.0000264555 0.0000266667 0.000266667 1 ct/C.M. = 3.086472 0.005343450 0.005291094 0.005333333 0.05333333 1 oz = 437.5 0.7574213 0.7500000007 0.7559874 7.559873 1 ozt = 480 0.8309993 0.8228570 0.8294261 8.294260 1 dwt = 24 0.04154997 0.
80 7.7 Where will I find details of…? Beeper setting Below-the-balance weighing The following index shows you the page number of these instructions on which you will find the information appropriate to a particular theme. The page numbers in bold print refer to the most important information for the specific search word.
Operating instructions METTLER TOLEDO AT balances Magnetic weighing samples or containers Manual adjustment Menu 59 47, 48 14 Operational setting Overload 22, 26 64 Percent Percent weighing Piece counting Power outage Printer proFACT Program cassette Readout increment Reference weight Repeatability Resolution Re-Zero Self-adjustment, fully automatic 31, 46 Self-test 5, 8, 75 Semimicro balance 12, 75 Setting options 14, 22 Stability detection 27, 68, 75 Stabilization time 61, 75 Standby 7, 75 Status in
82 Weighing mode press and hold key Menu Configurations register / SEttINGS J / SCALE J Automatic stability detection Weight unit 1 Data transmission mode rESET ASd Unit 1 S. J J 100 10 -1- 50 20 -7- -2- -6- -3- -5- -4- J External adjustment CAL USEr Readability * 5) Int 3) J mo g CM mg ct oz dwt ozt GN tI * J d 1 mg d 0.1 mg d 0.5 mg d 0.
J Set vibration adapter dF 0.01mg dF 0.05mg dF 0.
84 Technical specifications (after a warm-up time of at least 120 min.) Modell AT21 Comparator AT20 Readability Weighing capacity Taring range (by subtraction) Repeatability (s) full load Repeatability (s) 0...50 g 1 µg 22 g 0…22 g 2 µg 2 µg 22 g 0…22 g 4 µg Linearity Linearity within 500 mg 1) Linearity within 10 g 1) ± 6 µg ± 4 µg ± 10 µg ± 6 µg AT261 DeltaRange® 200g AT200 AT400 0.01 mg 205 g 0…205 g 0.04 mg 0.015 mg 0.01 mg 62 g 0…205 g 0.04 mg 0.015 mg 0.1 mg 205 g 0…205 g 0.05 mg 0.
