Mettler Toledo LJ16, LP16 Operating Instructions Manual
Installation and
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Operating Instructions
METTLER TOLEDO
Infrared Dryers
LJ16
LP16
Leerseite
Contents
1. Cautionary notes
Page
2
2. General
3. Mounting
4. Key pad assignment
5. Operation
6. What if ...?
7. Maintenance
8. Appendix
2.1 The infrared dryer
3.1 Preparing for mounting the LJ16
3.2 Preparing for mounting the LP16
3.3 Mounting the LJ16 and LP16
4.1 Keys with direct function
4.2 Keys with subsequent entry
5.1 Operation of the LJ16
5.2 Operation of the LP16
5.3 Performing a drying operation with the LJ16 or LP16
5.4 Attachment of accessories
7.1 Changing the fuses
7.2 Cleaning
8.1 Accessories
8.2 Technical data
8.3 Admissible ambient conditions
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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. Any other
application can endanger personnel and lead to damage to the instrument or other tangibles.
• The infrared dryer may be operated only by qualified personnel who are familiar with the properties of the samples used and
the handling of the instrument.
• Use only indoors in closed rooms.
• The infrared dryer may not be used in a hazardous environment and must be operated only under the ambient conditions
specified in these instructions.
Warning:
hot surface
• The infrared dryer operates with heat!
• Ensure sufficient free space around the instrument to avoid heat accumulation and overheating (approx. 1 m free
space above the instrument).
• Do not place any material on top, underneath or in the immediate vicinity of the instrument while the latter is
connected to the mains, as the area surrounding the drying unit will heat up.
• Exercise caution when removing the sample: The sample itself, the draft shield and any sample pan used can still be
very hot. The cooling time for the sample pan is approx.
1 minute.
• Your infrared dryer is supplied with a 3-core power cable with an equipment grounding conductor. Only extension cables
which comply with the standards and also have an equipment grounding conductor may be used. Deliberate disconnection
of the equipment grounding conductor is strictly forbidden!
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. If uncertainty exists regarding the flammability of a sample, always work with small amounts of sample (max. 1 gram).
In cases of doubt, conduct a careful risk analysis.
Poisoning, burning
• Substances which contain highly volatile toxic or corrosive components. Such substances may be dried only in a fume cupboard.
Corrosion
Substances which evolve corrosive vapors on warming (e.g. acids). For such substances we advise working with small amounts of sample as
the vapors can condense on colder housing parts and cause corrosion.
Please note that the user is always responsible and liable for damage caused by the use of the above-mentioned types of samples!
• Make no modifications or alterations to your instrument and use only original spare parts and accessories supplied by METTLER TOLEDO.
• Your infrared dryer is a rugged precision instrument - nevertheless, you should handle it carefully and it will thank you with many years of
trouble-free operation.
• Please heed all instructions and information in these operating instructions. Keep the instructions in a safe place where they are always
available should uncertainties arise. If you lose the instructions, please contact your METTLER TOLEDO dealer to obtain a replacement copy.
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2. General
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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
The principal application area of the infrared dryer is the food and chemical industries.
LJ16
The LJ16 Infrared Dryer is a simple-to-operate, compact instrument with integrated balance for
routine work in the lab and production.
LP16
The LP16 is a high-quality instrument for the lab. The LP16 can be operated with the following
METTLER TOLEDO balances:
• PM100, PM200, PM300, PM400, PM480, PM600
3. Mounting
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3.1 Preparing the balance for mounting the LJ16
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Checking the set voltage
Before first-time operation of the dryer, the associated balance must be checked for correct
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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.
Resetting the operating voltage
Warning
• First ensure that the instrument is disconnected from the power supply. If the power cable (1)
is attached, the interior of the balance is live even if the display is blank!
•When the operating voltage is reset, the microfuse must be changed.
(Section 7.1)
Resetting
• Remove weighing pan, unscrew screw (2) and carefully lift off top housing (3). Reset voltage
selector (4) with a screwdriver.
• Carefully remount top housing and insert and tighten screw (2).
Selecting the location
The correct location should be selected according to the following criteria:
• Stable, vibration-free position as horizontal as possible
• No drafts
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3.2 Preparing the balance for mounting the LP16
1
Removing the weighing pan
• Take off weighing pan (1) and pan support (2).
2
Installing the compensation weight on the LP16
If the LP16 is mounted on a PM600, PM2000, PM4000 or PM4800, the compensation weight in
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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. Marking (6) and cutout (8) must be aligned.
Resetting the operating voltage
Warning
• First ensure that the instrument is disconnected from the power supply. If the power cable (1)
is attached, the interior of the balance is live even if the display is blank!
•When the operating voltage is reset, the microfuse must be changed.
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(Section 7.1)
Resetting
• Remove weighing pan, unscrew screw (2) and carefully lift off top housing (3). Reset voltage
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selector (4) with a screwdriver.
• Carefully remount top housing and insert and tighten screw (2).
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Selecting the location
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The correct location should be selected according to the following criteria:
• Stable, vibration-free position as horizontal as possible
• No drafts
3.3 Mounting the LJ16 and LP16 drying unit
Note
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Before mounting, the preparatory measures must have been carried out.
LJ16, see section 3.1.
LP16, see section 3.2.
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• 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.
Setting the operating voltage
• Set voltage selector (3) at rear of dryer so that the voltage matches the local power supply
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voltage:
115 V (range 93 V ... 132 V)
230 V (range 187 V ... 264 V)
Mounting the dryer
•Mount dryer carefully on the balance as shown in the illustration opposite. Center hole (6) on
conical spigot of balance.
• Turn dryer clockwise until the stop.
The dryer is now mounted on the balance by means of the bayonet fixing.
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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.
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•When the bolt is the required length, screw knurled nut (2) to lower half (3).
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•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).
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• Insert pan support (8) in draft shield (5) and press downward gently.
Attaching the cables
• Attach the short connection cable (9) enclosed with the accessories to socket (10) of the
balance and to socket (11) of the dryer.
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• Connect drying unit and balance to the power supply.
If a LC-P45 Printer or a GA37 Digital/Analog Converter is attached:
• Attach connection cable (14) from the accessories of the printer or digital/analog converter to
socket (15) of the dryer and to the appropriate socket of the LC-P45 or GA37.
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START
STOP
• Turn on power switch (16).
• Switch on balance using the tare bar.
The flashing lamp of the START key at the front of the dryer signals operational readiness.
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