HF scientific CLX Online Residual Chlorine Monitor (Old) - Manual (Page 14)

The fluid waste from drain connection of this instrument contains reagents diluted
with large quantities of sample water. HF scientific inc. recommends that operators
check with local authorities concerning proper disposal of waste fluids.
A ½ “ ID tubing can be placed over the cabinet vent to redirect accidental spills of
reagent to a suitable container.
4.3 Setting Flow Rate
The flow rate on the CLX was factory adjusted; however, installation variances may affect
the flow. The optimal flow rate through the CLX should be adjusted. The flow is adjusted
by turning the adjustment screw on the pressure regulator. Refer to figure 4. To assist in
this adjustment follow the procedure shown below:
1. Press the SERVICE button.
2. Wait for the display to read HOLd, then press Mode/
Exit.
3. Display will show FLOW with the number 0. Press either the S or T button.
4. CLX will drain, and then pulse in water while a count is displayed on the screen.
5. The display will show one of three messages HI, LO or Good.
The flow test determines if the flow rate is suitable for proper operation. Adjust the
pressure regulator using a coin or a large flat blade screwdriver. Press either the S or T
button while in the FLOW routine to display a new flow rate. Please note that only ¼ turn
incremental adjustments should be made to the regulator on each attempt.
If the message is LO, turn the regulator control clockwise. If the message is HI, turn the
regulator counterclockwise. If the message is Good, no adjustment is required.
To return to normal operation, press the
↵ button.
4.4 Electrical Connections
All of the electrical connections to the instrument are made at the termination area which
is located on the left side of the instrument. Remove the high voltage cover by loosening
the captive screw. Refer to figure 5. The connections are labeled and are self-descriptive
(see Figure 5). Please follow all local and government recommendations and methods for
installation of electrical connections to and between the instrument and other peripheral
devices.
Plugs are inserted into the RS-485 and 4-20mA cable bulkheads when shipped, to ensure a
watertight seal. These plugs should be removed and discarded when cabling to either of
these connections.
The power cable bulkhead will accept cable diameters from 5.8mm (.230 in.) up to 10 mm
(.395 in.). All terminals are designed to accept wires in the range of 14-28 AWG. All
wires should be stripped to a length of 6 mm (¼”). A strain relief strap is provided to
reduce tension on the power terminals.
It is the user’s responsibility to assure that a watertight seal is maintained after the CLX
has been wired for operation. If any of the bulkheads are not tightened properly around a
cable or plug, the ratings of the instrument will be jeopardized and there is a possibility of
creating a shock hazard.
CLX (9/07) Page 8
REV 3.1