Hydro Instruments HC-220, Operation And Maintenance Manual

7

III.  CONFIGURATION MODE

How to Enter:

  See Section I.2b on page 3.

Overview:

  This mode is used to set permanent control parameters.  With the exception of Dosage and 

Residual (or other) Set Point, all other parameters are set in this mode.

NOTE:  The following is a fl ow chart showing each parameter in this mode.  Notes follow the chart with 
explanations of each parameter.  The selection of “Control Type” in the fi rst parameter will determine which 
of the three branches below is followed.

NOTE:  Refer to Section VII for explanation and defi nitions of terms.

I. Control Type:

  Select the control mode that will be used to operate the PID Controller.

    a.  Flow Pace (PV1) OR
    b.  Residual Control (or pH or ORP) (PV2)
    c.  Compound Loop (PV1 and PV2)

1.  Flow Pace Setup (Flow Input/PV1):

  Control and display settings for PV1 input.

1a. Flow Input Name.

FLO, PV1, H

2

O, PRO

1b. Input Signal Loss.

Maintain Output / Zero Output (Select One)

1c. Select the units for display.

%, GPM, MGD, LPM, MLD, GPD, M3/H, LPH

1d. Select Decimal Location.

(0, 0.0, 0.00, 0.000)

1e. Enter Full Scale Flow Value.

 (xxxx)

NOTE:  Calibrates Flow Input signal from zero to this Full Scale value.

1f. Enter Threshold Value. 

(In the units from point b above.) 

NOTE:  This parameter should be set at zero (0) unless you do not want the valve to respond until this 
threshold value is reached by the 4-20mA fl ow input signal. The valve will then scale the input from 
threshold to full scale as (0-100% of input signal).

1g. Select Flow Filter Time.

 (xxxx) 

(seconds) 

NOTE: Controller will apply a fi lter to the input signal over this time span.

1h. Set Low Level Set Point.

(in units chosen above)

NOTE:  When the fl ow signal drops below this level the Low Flow Alarm will trip.

2.  Residual (or ORP or pH) Control Setup (Residual/PV2):

  Control and display settings for PV2 input.

2a. Residual Input Name.

RES, ORP, pH, PV2

2b. Input Signal Loss.

Maintain Output / Zero Output (Select One)

2c. Select units for display.

PPM, MG/L, mV, pH, NTU, %

2d. Select Decimal Location.

(0, 0.0, 0.00, 0.000)

2e. Full Scale Res Value.

(+ or - xxxx)

2f. Minimum Value.

(+ or - xxxx)

2g. Res Filter Time.

 (xxxx) 

(seconds)

NOTE: Controller will apply a fi lter to the input signal over this time span.

2h. Filter Constant.

(Value range from 0 to 1.0.  Default is 0.7)

2i.  Low Set Point Limit.

 (xxxx)