Installation and Operating Instructions METTLER TOLEDO Infrared Dryers LJ16 LP16 °C MO DE % EN TE 0.. . -10 0% R 10 0.. . 0% AT R 0.. O . -99 9% AT R 10 O 0 99 ...
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Contents Page 2 1. Cautionary notes 2. General 2.1 The infrared dryer 4 3. Mounting 3.1 3.2 3.3 Preparing for mounting the LJ16 Preparing for mounting the LP16 Mounting the LJ16 and LP16 5 6 7 4. Key pad assignment 4.1 4.2 Keys with direct function Keys with subsequent entry 10 11 5. Operation 5.1 5.2 5.3 5.4 Operation of the LJ16 Operation of the LP16 Performing a drying operation with the LJ16 or LP16 Attachment of accessories 13 15 18 20 6. What if ...? 21 7. Maintenance 7.1 7.
2 1. Cautionary notes Your infrared dryer corresponds to state of the art technology and meets the requirements regarding instrument safety. This notwithstanding, improper handling can lead to hazards for personnel and tangibles. Please note the following instructions for safe and dependable operation: • The infrared dryer is used to determine moisture in samples. Please use the instrument solely for this purpose.
Certain samples require special care! Certain types of samples may possibly represent a hazard to personnel or tangibles through: Fire or explosion • Flammable or explosive substances • Substances containing solvent • Substances which evolve flammable or explosive gases or vapors when dried. When working with such samples, ensure a drying temperature which is low enough to prevent ignition or explosion and wear protective goggles.
4 2. General 2.1 The infrared dryer The infrared dryer is used to determine water or moisture content. This type of analysis is employed primarily in the following fields: • Determination of storage life and quality • Quality monitoring and control of intermediate products • Monitoring of and compliance with statutory regulations °C MO The principal application area of the infrared dryer is the food and chemical industries. DE % EN TE 0.. . -100 R 10 0.. . 0% % AT RO 0.. . -999 % AT RO 10 0..
3. Mounting 3.1 Preparing the balance for mounting the LJ16 1 3 2 4 Checking the set voltage Before first-time operation of the dryer, the associated balance must be checked for correct setting of the operating voltage. A label showing the set voltage is affixed above the power socket in the factory. If this specification does not match the power supply voltage or if the label is missing, the setting of the voltage selector inside the balance must be checked and altered if necessary.
6 3.2 Preparing the balance for mounting the LP16 Removing the weighing pan • Take off weighing pan (1) and pan support (2). 1 2 0.00 Installing the compensation weight on the LP16 If the LP16 is mounted on a PM600, PM2000, PM4000 or PM4800, the compensation weight in the draft shield must be changed. • Unscrew 3 screws (5); disassemble draft shield. • Take out compensation weight (7) built in as standard. • Install compensation weight. • Reassemble draft shield.
3.3 Mounting the LJ16 and LP16 drying unit 1 2 3 Note Before mounting, the preparatory measures must have been carried out. LJ16, see section 3.1. LP16, see section 3.2. • Lift up drying cover (1). • Take foam cushioning and plastic sheet out of draft shield (2). Remove draft shield with packaging. • Affix label with warning regarding heat development so that it is clearly visible.
8 Inserting the spacer bolt Prepare spacer bolt (1): The spacer bolt must have a length of approx. 66 mm. If the bolt is shorter: • Hold knurled nut (2) and loosen the lower half (3) by turning counterclockwise. • When the bolt is the required length, screw knurled nut (2) to lower half (3). • Mount spacer bolt (1) with taper leading on conical spigot of the balance. • Mount draft shield (5) on the three centering pegs (6). Ensure that spacer bolt (1) slides onto centering peg (7).
Function check • Tap pan support (7) with your hand and check whether the balance display reacts. • Check whether the display shows a constant value when the pan support is at rest. If this is not the case, the length of spacer bolt (12) must be corrected and the seating of draft shield (5) checked, see also section 6, “What if...
10 4. Keypad assignment 4.1 Keys with direct function 100... 0% 0... -100 % Calculation mode keys Calculation of the dry weight In this calculation mode, the dry weight of the sample is calculated in percent (referred to the wet weight = 100 %). At the end of the drying time, the dry weight (100 % ... 0 %) is available. The drying progress can be followed on the display.
Switch key This key allows selection between weight and percentage display during the drying operation. Note regarding calculation mode ATRO value: If the dry weight (key ATRO 0 ... -999 % or ATRO 100 ... 999 %) is used as a basis for the calculation, a percentage display is not possible until the drying operation has ended. % START START key This key is used to start the drying operation: • Lamp flashes 1 instrument in operational readiness. • Lamp lit up 1 drying operation in progress.
12 Print interval key This key is used – before the start of a drying operation – to call up the stored print interval time of 0 ... 9.9 minutes to the display and release it for change. MODE MODE key (LP16 only) This key is used – before the start of a drying operation – to select the desired MODE (operating mode).
5. Operation 5.1 Operation of the LJ16 Controls (1) Control bar of the balance (tare bar) (2) Keypad of the dryer °C MO DE % EN 0.. . -100 TE R 10 0.. . 0% % AT RO 0.. . -999 % AT RO 10 0.. 99 . 9% STA RT ST OP 1 Switching display on/off • Press control bar (1) briefly ; all display segments light up for a few seconds. • The display then shows 0.000 g. • Raise control bar briefly; the display blanks out. Taring 2 • Place aluminum sample pan on pan support.
14 Changing weighing speed or reproducibility The LJ16 can be adapted to the ambient conditions. For this, the appropriate setting should be selected for the integration time and the stability detector. Setting stability detector Weighing speed ASd -1ASd -2ASd -3ASd -4- Reproducibility very fast good relatively slow very good Stability detector • Press control bar until -ASd- appears, then release. • Press control bar briefly; the display changes to the next setting.
5.2 Operation of the LP16 Controls (1) Control bar of the balance (tare bar) (2) Keypad of the dryer °C MO DE % EN 0.. . -100 TE R 10 0.. . 0% % AT RO 0.. . -999 % AT RO 10 0.. 99 . 9% STA RT ST OP 1 2 0.0009 Switching display on/off • Press control bar briefly; all display segments light up for a few seconds. • The display then shows 0.000 g. • Raise control bar briefly; the display blanks out. Taring • Mount aluminum sample pan on the weighing pan.
16 Changing weighing speed or reproducibility The LP16 can be adapted to the ambient conditions. For this, the appropriate setting should be selected for the stability detector, the weighing process adapter and the vibration adapter. Setting stability detector Weighing speed ASd -1ASd -2ASd -3ASd -4- Reproducibility very fast good relatively slow very good Stability detector Performing the settings • Press control bar until -ASd- appears in the display, then release.
5.2.1 Sample weight Automatic switch-off criterion The LP16 and LJ16 have an automatic switch-off criterion. The adjacent curve shows the typical weight profile of a sample during a drying operation. The automatic switch-off criterion offers the user the possibility of terminating drying automatically when the weight loss per time interval is less than a preset value. Wet Example: Weight loss < 2 mg/30 sec. Dry Time LP16: Variable, freely selectable, automatic switch-off criterion (1 ...
18 5.3 Performing a drying operation with the LJ16 or LP16 Switching off with manual stop 0... 100... -100 % 0% ATRO 0... -999 % ATRO 100... 999 % Select calculation mode Press key of the desired calculation mode. Switching off with the time switch 0... 100... -100 % 0% ATRO 0... -999 % ATRO 100... 999 % Set drying time 0 Press the drying time key. Set time 0 (infinitely long drying). Press ENTER key. ENTER °C ENTER Select calculation mode Press key of the desired calculation mode. 0...
Switching off with manual stop START % STOP Switching off with the time switch Switching off as soon as a preset weight loss per time interval is reached Load sample • Open drying cover. • Mount aluminum pan on the pan support. • Tare. • Distribute sample evenly. • Close dryer. Load sample • Open drying cover. • Mount aluminum pan on the pan support. • Tare. • Distribute sample evenly. • Close dryer. Load sample • Open drying cover. • Mount aluminum pan on the pan support. • Tare.
20 5.4 Attachment of accessories Attachment to LJ16, LP16 LC-P45 Top unit Printer Attachment of the LC-P45 Printer for recording results numerically Printout with time,date and sample number Balance GA37 Top unit D/A Converter Balance Attachment of the GA37 Digital/Analog Converter for graphical representation of the drying profile Set print interval to 0.1 minutes for this.
6. What if ...
22 Error/Display Possible cause Rectification Lamp of the MODE key flashes (LP16 only) • Entry not closed with ENTER • Close entry with ENTER Drying unit does not heat • Flat connector from top part to balance not plugged in • Infrared radiators faulty • Plug in connector properly • Inform METTLER TOLEDO customer service • Close entry with ENTER The parameters to be changed can not be called up • Previous entry not closed with ENTER No entry possible • A drying operation has been performed befo
Error/Display Possible cause Rectification Drying operation does not start and no error message in the display • Connection dryer - balance interrupted • A drying operation has been performed beforehand • Set up correct connection • Open drying cover No switching between weight and percentage display possible • Drying operation has not been started • The calculation mode ATRO value has been selected for the drying operation • Start drying • Percentage display does not appear until after end of dryin
24 Error/Display Possible cause Rectification Drying operation is not aborted until after 3'10", 3'30" or 5' although the sample no longer loses weight • Minimum drying time 3'10"/3'30"/5', depending on the setting of the abort criterion • Perform new setting or use time-controlled switching off The message ERROR appears in the display • Admissible temperature range exceeded • Disconnect power connector and plug in again • If error message remains, inform METTLER TOLEDO service The reproducibility
7. Maintenance 7.1 Changing the fuses Changing “3.15 A slow-blow” fuse • Disconnect power cable of the dryer! • Lever out holder (1) of the microfuse using a screwdriver. • Change 3.15 A slow-blow microfuse (spare in holder). • Plug in connector cable. 1 Changing “200 mA slow-blow” or “100 mA slow-blow” fuse • Disconnect power cable of the dryer! • Take out holder (2) particular microfuse with a screwdriver turning it to the left.
26 7.2 Cleaning NITRO The draft shield should occasionally be freed from dust and dirt. The reflector must be kept clean. A cloth and some soapy water suffice for external cleaning. Never use powerful solvents. The above are the only cleaning operations needed for the dryer.
8. Appendix 8.1 Accessories Description Order No. Aluminum pan, set of 80 Pan support Spacer bolt Compensation weight No. 2 Draft shield Power cable Connection cable Microfuse 3.
28 8.2 Technical data Power supply admissible range 115 V admissible range 230 V Frequency Power consumption LP16 (e.g. with PM480) 115 V/230 V (selectable) 93 V ... 132 V 187 V ... 264 V 50 Hz ... 60 Hz max. 470 VA LJ16 115 V/230 V (selectable) 93 V ... 132 V 187 V ... 264 V 50 Hz ... 60 Hz max. 470 VA Temperature (range) Graduation Time switch (range) Calculation modes 50 °C ... 160 °C 5 °C 0 ... 240 min 4 methods 50 °C ... 160 °C 5 °C 0 ...
Dimensions (W x D x H) Weight incl. balance Interface (for LC-P45 Printer or computer connection; BalanceLink) Drying method Automatic abort criterion Application brochure Active display Identification of the sample with DataPac-M Graphical representation (GA37) DeltaTrac® Balance usable separately LP16 (e.g. with PM480) 195 x 330 x 260 mm approx. 7 kg LJ16 195 x 330 x 260 mm approx. 7 kg RS232 and CL Infrared drying ≥ 1mg / 120 sec ...
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. Subject to technical changes and to the availability of the accessories supplied with the instruments. *P704719* © Mettler-Toledo GmbH 1999 704719D Printed in Switzerland 9902/2.
