HF scientific CLX Online Residual Chlorine Monitor - Manual (Page 31)

CLX (1/12) Page 26
REV 5.1
A level 1 fault is a system fault. This is NOT a problem that the operator can correct, and
the unit must be returned to the factory for service (see section 9.5). These failures consist
of failures in the CPU, A/D, EEPROM or other devices internal to the instrument. The
queued display will show FAIL, the upper display is a five digit code. If this fault occurs,
it will affect the 4-20mA and any alarm set for fault detection (Error). The instrument will
not operate with this fault. The sample back light blinks at rate of once every 0.4 seconds.
If any fault condition occurs, the message indicating the fault will be shown on the lower
row of the display.
9.2 Setting Flow Rate
The flow rate on the CLX was factory adjusted and should not need adjustment.
Installation variances may affect the flow. The optimal flow rate through the CLX may be
adjusted if needed. The flow is adjusted by removing regulator vinyl cap and 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  or  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. Loosen the
locking nut then adjust the pressure regulator using a coin or a large flat blade
screwdriver. Press either the  or  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. Tighten the
locking nut after adjustment and replace the regulator vinyl cap. To return to normal
operation, press the
↵ button.
9.3 Clearing Faults
Every time SERVICE mode is exited, all faults are cleared. If the original fault or a new
fault occurs, it will be posted.
9.4 Reagent Clogs
If reagents fail to flow or Prime it may be due to a clog in either the tubing or at a check
valve. To alleviate this you may have to flush the system with Chlorine Free water,
preferably Deionized water. See section10.3 Check Valve Flushing Kit.