LaMotte COD - Manual (Page 3)

SPECIFICATIONS
Description:
Power supply
220-240V/50-60Hz or
110-120V/50-60Hz
Power 400W
Weight 3.600 kg
Dimensions (W x H x D) 155 x 95 x 275 mm
Selectable temperatures 150 – 120 – 100 – 70°C
Selectable times 30 – 60 – 120 minutes or infinite
Diameter of holes 16 mm
Thermoregulation P.I.D. microprocessor
Precision ± 0.2 % end of scale
Temperature probe Pt 100 class A
Probe calibration Automatic by software
Heating block:
Temperature stability ± 0.3°C
Temperature homogeneity ± 0.3°C
Temperature precision ± 0.3°C
Overtemperature protection On the block
Performance:
From 20°C to 150°C 10 minutes
Signals:
Reaching of set temperature
Beep
During time count Visual
End of cycle Beep
Error
(set temperature > block temperature)
Visual and Beep
Alarm (broken probe) Visual and Beep
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INTRODUCTION
The LaMotte COD Heater Block will accommodate 25 round, 16 mm outside
diameter, glass test tubes. It may be used for sample preparation in determining
COD, total phosphorus, total chromium and other parameters in water and sludge.
The COD Heater Block, together with LaMotte instruments, reagents and
accessories for colorimetric and spectrophotometric analysis, form a complete
analytical set capable of high precision and reproducibility, with a limited space
requirement.
DESCRIPTION OF CONTROLS
Main switch: The switch is lighted when the instrument is turned
on.
Start/Temp: Pressing the Start/Temp key will begin a work cycle.
The default temperature and time settings are 150°C
and 120 minutes and are indicated by the
corresponding green LED. To change the temperature
setting, continue pressing the Start/Temp to move
the green LED light to the corresponding
temperature. Temperature settings can be changed
while the instrument is heating; however, once the
selected temperature is reached the Start/Temp key
will lock and hold that setting. In addition the
Start/Temp key will not allow selection of a
temperature setting lower than the actual
temperature of the heater block (Example: when a
cycle at 150°C is followed by a cycle at 120°C).
When resetting the temperature to a lower setting,
allow the heater block to cool to a temperature lower
than that to be programmed.
Time: The Time key is used to select between the four
available time settings: 120 – 60 – 30 minutes or
infinite time.
The green LED will indicate the selected time. Once
the set temperature is reached the instrument will
beep for 5 seconds. The Time setting will lock and
the LED will blink during the timed cycle.
Temperature LED: When Start/Temp is pressed and the work cycle
begins, the LED corresponding to the set temperature
will light up. When all the LEDs blink the chosen
temperature is higher than the block temperature. If
all the LEDs are out no work cycle is developing.
Time LED: When Start/Temp is pressed and the work cycle
begins, the LED corresponding to the set time cycle
will light up. The LED will blink during the timed cycle
once the heating block has reached the set
temperature.
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