Model 672

Model 672C Conductivity Analyzer

  • Accepts contacting type conductivity sensor with any cell constant
  • Displays conductivity, temperature, system Configuration, mA output & TDS(optional)
  • Simple automated calibration
  • Two-fully programmable relays
  • Auto / Manual temperature compensation
  • Diagnostic error messages identify abnormal system conditions
  • Simple proportional control
  • Customized and OEM designs offered

Operational:

Display
4-1/2 digit back light LCD with measurement unit and setup variable identifiers, 7/8” high digits
Measuring Range
0 - 20, 200, 2000 & 5000 μS/cm; 0 – 10 & 75 mS/cm; 0-9999 ppm
Temperature
(-)10.00 to (+)200°C (14 to 392°F)
Ambient Conditions
-20 to 60°C (-4 to 140°F), 0 to 100% relative humidity, non-condensing
Relay Function:
Operating Modes Control: Setpoint with adjustable deadband. Selectable operation in response to increasing or decreasing measured value
Alarm: Dual-alarm relay operation with low and high alarm points and fixed deadbands (1.0 % of full scale)
Fail-safe: Reverses normal activation of Relay A and B (in control or alarm mode) so that relays are denergized in the non-control or non-alarm state
System Alarm: Relays B energized whenever instrument detects a system diagnostic error (out-of-range conductivity and/or temperature input or memory loss)
This mode overrides selected control or alarm mode
Indicators
Relay A and B annunciators flash on and off whenever respective relay energizes.
Outputs
Two SPDT contact outputs, U.L. rating: 5A 115/250 VAC, 5A @ 30 VDC resistive
Conductivity Sensor
Cell Constant = 0.05, 0.5 or special
(a) 3239 (Upto 200°C. Boiler blowdown steam condensate applications)
Refer : 3239 Datasheet
(b) 3000 (Upto 125°C DM water, Multi Distill Column applications)
Refer : 3000 Data sheet
Temperature Compensation
Automatic: 0-200°C for Pt 1000 RTD. 0-125°C for 3K Ohm Thermister
Manual 0-200°C automatic programmed fixed value in case of temp. element failure
Sensor-to-Analyzer Distance
300 feet
Power Requirements
98-132 VAC, 50/60Hz (less than 5VA), Optional 195-265 VAC, 50/60Hz
Analog Outputs*
Isolated 0-1 mA, 100 ohms Maximum load
Isolated 0-5 VDC, 1000 ohms Maximum load
Isolated 4-20 mA, 1000 ohms Maximum load

Range Expand - The analog outputs can be made to represent a one pH unit or 50 mV / (ORP)

∆ Each output is isolated from the input, ground and line power, but not from each other.
Analyzer Performance (Electrical, Analog Output):
Sensitivity
0.3% of span
Stability
0.1% of span per 24 hours, non-cummulative
Repeatability
0.2% of span or better
Non-Linearity
0.5% of span
Temperature Drift
Zero: 0.05% of span per °C
Span: 0.025% of span per °C
Response Time
1, 10 or 30 seconds to 90% of value upon step change, selectable
Mechanical:
Enclosure
NEMA 4X, ½ DIN with two ½ -inch conduit holes and two stainless steel mounting brackets
Mounting
Surface, panel, and horizontal pipe Mount. Vertical pipe mounting optional
Net Weight
3 Ibs. (1.36 kg)

Ordering Information

Please choose one from each category to build your product number.
MODEL NUMBER 672C Microprocessor based analyzer in NEMA 4X, ½ DIN enclosure, Polycarbonate
DISPLAY A Conductivity
B TDS & Conductivity (selectable)
CELL CONSTANT K1 0.05
K2 0.5
K3 1.0 (NTC 3KΩ only)
K4 10.0
K5 Special
TEMPERATURE T1 RTD 1KΩ
T2 Thermistor 3KΩ
LINE VOLATGE V1 115 V AC, 50/60 Hz
V2 230 V AC, 50/60 Hz
ANALOG OUTPUT I0 Without 4-20mA output
I1 Isolated 4-20mA output
RELAYS R0 Without Relays
R1 With Relays
N Standard Instrument
K Special Instrument

Dimensions (Inches (mm)):

Model 672C dimensions