Chemtrac HydroAct 4, User Manual

Page: 38 / 77

38 Chapter 3. Sensors
3.1.2.2 Technical Data
3.1.2.2.1 Sensor
Laser Type Solid-state Laser Diode (780nm)
Flow Cell Dimensions 750 x 750 µ m
Cell Material Nituff
TM
coated aluminum, (PEEK plastic, Optional)
Viewing Windows
Sapphire
Detection Range
2 - 750 µ m
Size Channels
Up to 6, user selectable size ranges.
Sizing Range 2..127
µ
m
Flow Rate 75 ml/min
Laser Diode Life greater than 75000 hours at 55 °C
Measurement Type Volumetric, counts/ml, counts/100ml.
Operating Temperature 0..50 °C
Enclosure Dimensions 262mm (w) x 120 mm (h) 90mm (d)
Weight 3.2kg
Sample temperature 0°- 50 °C, non-freezing
Sample Head 762mm minimum (30 in.)
Calibration frequency Annual
3.1.3 Installation
3.1.3.1 Site Selection
Please choose a suitable location for the installation of the electronics. The choice of installation point
on any site is a compromise and is best undertaken by an experienced installation engineer. The
following is a list of the factors that need to be taken into consideration. This list is not intended as a
check-list neither is it implied that the list is complete.
• Ensure that the mounting allows access to all serviceable parts.
• Try to mount the electronics in a position where they are not habitually hosed down in a cleaning
process.
• The electronics enclosure should be mounted away from sources of heat or direct sunlight.
• Consider the length of wiring runs when mounting the instrument.
• Try to keep the electronics away from substations, motors or other large EMI emitters.
• Consider whether the sample will be representative and well mixed.
• Consider sample line run times.
• Consider sample return points.
• In a plastic run, with a low conductivity liquid sample, consider earthing the sample.
• If the instrument is controlling a dosing pump, size the pump appropriately.
While installing the PC6 Particle Counter sensor, avoid excessive vibration, dropping or
banging on the unit. The optics inside the sensor can be knocked out of alignment if the
unit is improperly handled.
3.1.3.2 Weir Assembly
Prior to mounting the PC6 Particle Counter sensor it will be necessary to assemble the weir. The weir
comes unassembled in four pieces. Those four pieces are simply screwed together to look like the
weir shown in the following diagram.