Hach 48685 Manuel utilisateur
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DOC023.97.80196
Sample Heater
02/2012, Edition 3
User Manual
Manuel d'utilisation
Specifications
Specifications subject to change without notice.
Application For water samples. Do not use the application for concentrated acids,
bases or any type of volatile sample.
Output temperature precision ±1.5 ºC (2.7 ºF) under reference conditions 1
Display resolution 1 ºC (1 ºF)
Set point range 20 to 50 °C (68 to 122 °F) Refer to operating charts for more information.
Flow rate range 50-300 mL/min; Sample Heater internal volume is 39 mL
Power requirements for single
phase (with grounded neutral) only
120 Vac, 50/60 Hz, 11A
230 Vac, 50/60 Hz, 5.5A
Installation category II
Inlet pressure 689.5 kPa (100 psi) max. internal pressure. This rating is for the Sample
Heater and does not affect the Analyzer requirements.
Sample fittings Two ¼" OD Tubing Compression fittings
Weight Net—4.98 kg (11 lb)
Shipping—6.35 kg (14 lb)
Wetted parts 316 Stainless Steel
Ambient operating temperature 0 to 50 °C (32 to 122 °F)
Pollution Degree 2
Protection Class I
Maximum Altitude 2000 m (6560 ft)
Enclosure Rating NEMA 4X, IP 65
Compliance Information Listed for use in general locations to UL and CSA Standards by ETL. CE
certified.
Storage Temperature -20 to 70 ºC (-4 to 158 ºF) with fluids drained.
Humidity Maximum relative humidity 80% for temperatures up to 31 ºC decreasing
linearly to 50% R.H. at 40 ºC.
1Within proportional control range (see charts) and input temperature ±5 ºC, flow rate ±10%, 115 VAC, 60 Hz
±2 Hz and ambient temperature ± ºC. Instrument tuned at operating conditions (Autotune 3). Cal offset
adjusted to yield the set temperature at the point of use.
Sample heater operating range
Figure 1 shows in graph form the sample heater operating range in terms of sample output
temperature and minutes. Figure 2 shows in graph form the sample heater operating range in terms
of sample output temperature and line AC voltage.
English 3
Figure 1 Temperature-minutes
1 Sample output temperature, ºC 2 Minutes
Figure 2 Temperature-line AC voltage
1 Sample output temperature, ºC 2 Line voltage, VAC
**milliliters per minute
General information
In no event will the manufacturer be liable for direct, indirect, special, incidental or consequential
damages resulting from any defect or omission in this manual. The manufacturer reserves the right to
make changes in this manual and the products it describes at any time, without notice or obligation.
Revised editions are found on the manufacturer’s website.
4 English
Safety information
N O T I C E
The manufacturer is not responsible for any damages due to misapplication or misuse of this product including,
without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent
permitted under applicable law. The user is solely responsible to identify critical application risks and install
appropriate mechanisms to protect processes during a possible equipment malfunction.
Please read this entire manual before unpacking, setting up or operating this equipment. Pay
attention to all danger and caution statements. Failure to do so could result in serious injury to the
operator or damage to the equipment.
Make sure that the protection provided by this equipment is not impaired. Do not use or install this
equipment in any manner other than that specified in this manual.
Use of hazard information
D A N G E R
Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious
injury.
CAUTION
Indicates a potentially hazardous situation that may result in minor or moderate injury.
N O T I C E
Indicates a situation which, if not avoided, may cause damage to the instrument. Information that requires special
emphasis.
Precautionary labels
This is the safety alert symbol. Obey all safety messages that follow this symbol to avoid potential
injury. If on the instrument, refer to the instruction manual for operation or safety information.
This symbol indicates that a risk of electrical shock and/or electrocution exists.
Electrical equipment marked with this symbol may not be disposed of in European public disposal
systems after 12 August of 2005. In conformity with European local and national regulations (EU
Directive 2002/98/EC), European electrical equipment users must now return old or end-of-life
equipment to the Producer for disposal at no charge to the user.
Certification
Canadian Radio Interference-Causing Equipment Regulation, IECS-003, Class A:
Supporting test records reside with the manufacturer.
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numèrique de la classe A respecte toutes les exigences du Rëglement sur le matériel
brouilleur du Canada.
FCC Part 15, Class "A" Limits
English 5
Supporting test records reside with the manufacturer. The device complies with Part 15 of the FCC
Rules. Operation is subject to the following conditions:
1. The equipment may not cause harmful interference.
2. The equipment must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications to this equipment not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment. This equipment has been tested
and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference, in which case the user will be required to
correct the interference at their expense. The following techniques can be used to reduce
interference problems:
1. Disconnect the equipment from its power source to verify that it is or is not the source of the
interference.
2. If the equipment is connected to the same outlet as the device experiencing interference, connect
the equipment to a different outlet.
3. Move the equipment away from the device receiving the interference.
4. Reposition the receiving antenna for the device receiving the interference.
5. Try combinations of the above.
Product overview
D A N G E R
The Sample Heater Model 48685 is not designed for use with flammable or explosive samples. If a sample
solution other than water is used in this product, test the sample/product compatibility to assure user safety and
correct product performance.
Figure 3 shows the sample heater. The sample heater has a thermostatically controlled outlet
temperature and is designed for use with water analysis instruments that require an elevated and
controlled sample temperature.
6 English
Figure 3 Sample heater
The heater contains a heater module, temperature controller, temperature sensor, thermal cut-off
switch, circuit breaker and power-connection terminal. The housing consists of a gasket-sealed
plastic enclosure.
A single piece of stainless steel tubing cast in an aluminum block and two 700 watt electric heater
elements make up the heater module. The stainless steel tube has two stainless steel adapter fittings
brazed on each end.
The temperature controller is a Watlow EZ-ZONE PM Express with microprocessor-based auto-
tuning control.
Figure 3 shows the normal operating display, the control panel and the controller keys, and describes
the controller key functions.
The lower window displays the set-point temperature and the upper window displays the process
temperature. The operator enters the setpoint and the controller heats the sample to the setpoint.
The 1 indicator light is on when the heating element turns on. A thermocouple attached to the outlet
tube of the heater module makes up the temperature sensor. The sensor indicates the sample
temperature at the outlet. A thermostat mounted on the heater block protects the product and user
from a thermal run-away fault (Wire the instrument on page 11).
English 7
Figure 4 Sample heater display and control panel
1 Infinity key--clears and silences alarms. This key is
factory locked by default. When the menu is
unlocked, this key will clear and silence alarms,
back up one level, or if held for 2-3 seconds return
to the Operation Menu.
5 Lower display--shows setpoint temperature
2 Upper display--shows process temperature 6 Up and Down arrow keys--Adjusts the setpoint in
the lower display. In other unlocked pages, changes
the upper display to a higher or lower value, or
changes a parameter selection.
3 Output 1 indicator--shows output activity 7 Advance key--moves through parameter prompts
4 Temperature unit indicator (Celsius) 8 A/M key--toggle the control mode. Locked by
default. When the Operation Menu is unlocked, this
key will toggle the control mode, and set mode to
Manual when the A/M key is pressed for 3 seconds.
Product components
Make sure that all components have been received. If any items are missing or damaged, contact the
manufacturer or a sales representative immediately.
Installation
Mount the instrument
D A N G E R
Burn, electrical, fire and chemical hazards. Only qualified personnel should conduct the installation tasks in this
section of the manual.
Figure 5 and Figure 6 show the sample heater dimensions. The sample heater has four mounting
feet. Install the instrument vertically on a wall with the sample connections on the bottom. Refer to
the appropriate manual for more information.
8 English
Figure 5 Sample heater (front view)
English 9
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