pH/Redox (ORP) Analyzers 4630 and 4635

Display
Measured Value:
5 digit, 7 segment back-lit LCD.

Information:
16 character, single line, dot matrix, back-lit LCD.

Ranges:
Programmable 0 to 14pH ± 1000mV. (ORP).

Minimum range:
Any 5pH units or 300mV.

Resolution:
0.1 pH, ± 1 mV.

Accuracy:
±0.01 pH, ± 1 mV.

Temperature compensation:
14° to 230°F (-10° to 110°C) manual or auto via Pt100 resistance thermometer.

Environmental Data
Operating temperature limits:
-4° to 131 °F (-20° to 55°C).

Storage temperature limits:
--13° to 158°F (-25° to 70°C).

Operating humidity limits:
Up to 95% RH non-condensing.

Power Supply
Voltage requirements:
100 to 130V or 200 to 260VAC 50/60Hz.

Power consumption:
<6VA.

Error due to power supply variation:
Less than 2% for +6% - 20% variation from nominal supply voltage.

Insulation:
AC to ground (line to ground) 2kV r.m.s.

Outputs and Set Points
Number of relays:
Two.

Set point adjustment:
Programmable.

Set point differential:
±1% of span.

Relay contacts:
Single pole changeover.
Rating 250V a.c. 250V d.c. max.
           3A a.c. 3A d.c. max.
Loading (non-inductive) 750VA 30W max.
(inductive) 750VA 3W max.

Insulation:
2kV r.m.s. contacts to ground.

Number of set points:
Two.

Set point adjustment:
Programmable.

Set point hysteresis:
± 1 % fixed.

Local set point annunciation:
Red L.E.D.

Retransmission:
Number of retransmission signals:
One fully isolated.

Output current:
0 to 10mA, 0 to 20mA or 4 to 20mA programmable.

Accuracy:
±.25% f.s.d. or ±0.5% reading.

Resolution:
0.1 % at 10mA, 0.05% at 20mA.

Maximum load resistance:
750 (20mA max.).

Serial communication:
RS485 (optional extra)