Xylem 3675 pH CONTROLLER User Manual
Page 8
Global Water
800-876-1172
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1. Press the LOW ALARM set point switch .The instrument will indicate the
alarm set point value. The alarm set point value can be adjusted by the
LOW ALARM set point control.
2. Release the LOW ALARM set point switch. The instrument will indicate
the measured process value.
3. The LOW ALARM set point LED will be ON and the LOW ALARM
output relay will be energized when the measured value is less than the
alarm set point value. The LOW ALARM set point LED will be OFF and
the LOW ALARM output relay will be de-energized when the measured
value is greater than the alarm set point value.
c) SET POINT HYSTERESIS:
The hysteresis for the meters is factory set to ±0.1pH (10 mV).For HIGH
ALARM set points, the trigger ON point is 0.1pH (10 mV) above the set point
values and trigger OFF point is 0.1pH (10 mV) below the set point values. For
LOW ALARM set points, the trigger ON point is 0.1 pH (10 mV) below the set
point values and the trigger OFF point is 0.1 pH (10 mV) above the set point
values.
X) Isolated 4-20 mA Output
a) pH MODE OUTPUT:
The 4-20 mA Output is 4mA at 0 pH and 20 mA at 14 pH. The pH value can be
obtained by measuring the output current, A, based on the following equation.
b) mV MODE OUTPUT:
The 4-20 mA output is 4 mA at 0 mV and 20 mA at 1400 mV. The mV value can
be obtained by measuring the output current, A, based on the following equation.
mV = (A-4) x (1400/16)
Example: A=12 mA for mV=700
pH MODE
mV MODE
XI) Trouble Shooting
Other issues
a) Call us for tech support: 800-876-1172 or 916-638-3429 (many problems can be
solved over the phone). Fax: 916-638-3270 or Email:
.
Be prepared to describe the problem you are experiencing including specific