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Conductivity Monitor / Controller

Conductivity Monitor / Controller

756II, 757II, 758II,759II
758 II w/Dual alarms and a 4 1/2 digit backlit LCD

750 SERIES II Conductivity / Controllers
The unique circuitry of the 750 Series II Conductivity Monitor/controllers guarantee accurate and reliable measurements. Drift free performance is assured by "field proven" electronics, including automatic DC offset
compensation and highly accurate drive voltage.

Since temperature compensation is at the "heart" of accurate water measurement, all Myron L Monitor / controllers feature a highly refined and precise TC circuit. This feature perfectly matches the water temperature coefficient as it changes. All models corrected to 25°C. Uncompensated models available to
conform with USP 25.

A push-to-test button makes setpoint checks easy, while the internal alarm set discourages unauthorized adjustments.

Standard on all controller models is a heavy-duty 10 amp output relay, operating on either increasing or decreasing readings. Bright green/red LEDs indicate above/below setpoint readings.

All 750 Series II models feature an IP64/NEMA 3 splash and corrosion-proof rated enclosure while being a compact size at 6x4.8 inches (15.2x122mm). They are suitable for panel, bench or surface mounting.

Accessories include a 3 Sensor input, a 3 Range switch (both installed separately from the monitor / controller) and a RA™ - Remote Alarm.
Custom and OEM Models available. Contact us with your requirements.

Features
Seven Ranges: 0-200 Kilohms to 0-20 Megohm-cm
Choice of analog meter or 3½ digit LCD
Automatic temperature compensation to 25°C
0-10 VDC Recorder Output
IP65/NEMA 4X water resistant & corrosion proof enclosure
Single setpoint/alarm
Adjustable setpoint hysteresis
24VDC Solid state output
10 amp relay operates on choice of increasing or decreasing reading
LED's show "above/below" alarm/control status
Push-to-test set point check
Internal set point discourages unauthorized adjustment
Selectable 115/230 VAC
Reliable, easily installed sensor
CE Approved

Options Include

Second Alarm/control Module

4-20 mA Isolated Output
Piezo Electric Alarm
3½ Digit Backlit Display
Temperature Module
24 VAC and 24 VDC Isolated Power

To order 750 series II Conductivity /TDS Monitor/controllers:

Model Range Options
756 II Analog ( monitor only) See the conductivity /TDS Range Chart Below -SC Second control module (757 II & 758 II only
-4A 4020 mA module (758 II & 759 II only)
-PA Built in 70 db piezo alarm
-35BL 3 1/2 digit backlit LCD
-45 4 1/2 digit backlit LCD
-TP Temperature module (758 II & 759 II only)
757 II Analog (monitor/ controller)
758II Digital (monitor/controller)
759 II Digital (monitor only)

Example: - 758 II - 121 - 4A
Is a digital monitor/controller with a 0-200 µS range and a 4-20 mA isolated output.
Note: Monitor number does not include sensor.
Please specify sensor required when ordering.

Conductivity/TDS Range Chart
Please add Suffix to Model No. in the Notes section at checkout
Range: Suffix
to Model No. 		Range: Suffix
to Model No.
0-1 µS + -101 0-1 ppm* + -102
0-2 µS + -103 0-2 ppm* + -104
0-5 µS + -105 0-5 ppm* + -106
0-10 µS + -107 0-10 ppm* -108
0-20 µS -109 0-20 ppm* -110
0-50 µS -111 0-50 ppm* -112
0-100 µS -113 0-100 ppm* -114
0-200 µS -115 0-200 ppm* -116
0-500 µS -117 0-500 ppm* -118
0-1000 µS -119 0-1000 ppm* -120
0-2000 µS -121 0-2000 ppm* -122
0-5000 µS (0-5 mS) ++ -123 0-5000 ppm* (0-5 ppt)++ -124
0-10,000 µS (0-10 mS) ++ -125 0-10,000 ppm* (0-10 ppt)++ -126
0-5000 µS (0-20 mS) ++ -127 0-20,000 ppm* (0-20 ppt)+ -128
0-5000 µS (0-50 mS)** ++ -129 0-50,000 ppm* (0-50 ppt) ++ -130
0-5000 µS (0-100 mS)** ++ -131 0-100,000 ppm* (0-100 ppt)++ -132
0-200,000 µS (0-200)** ++ -133 0-200,000 ppm* (0-200 ppt)+ -134

Except as noted, Conductivity/TDS Monitor/controllers require a sensor with a cell constant of 1.0. The Model CS51 is the
most commonly selected sensor due to its of use and low cost.
* CS51LC Conductivity Sensor (0.1 constant) required for these ranges.
** CS52 Series Conductivity Sensor (10.0 constant) required for these ranges.
+ Available in Digital models Only.
++ Available with 4 1/2 Digit Backlit LCD.
NOTE: Unless ppm/NaCl is specified with order (by adding an "N" to the above part #; i.e. -122N), ppm type conductivity
instruments will be calibrated to the Myron L "442™" Natural Water standard.

Monitor/controller Pricing
Model Conductivity/TDS
756II Conductivity/TDS Analog Monitor only
757II Conductivity/TDS Analog Monitor/controller
758II Conductivity/TDS Digital Monitor/controller
759II Conductivity/TDS Digital Monitor only

EXAMPLE:
A digital 0-20 mA Resistivity Monitor/controller with a 4-20 and a 3 1/2 digit backlit display would be:
MODEL
758II		 RANGE
-121		 OPTIONS
-4A-45BL		 TOTAL PRICE

Options
SC Second Alarm/Control Module (Monitors/Controllers only)
4A 4-20 mA Self-Powered isolated output module (Digital only)
PA 70db Piezo Electric Alarm (mounted on front panel) -(digital Monitor/controllers only)
PAT Piezo Alarm & Timer Module (digital Monitor/controllers only)
45BL 4 1/2 Digit backlit Liquid Crystal Display (LCD)
35BL 3 1/2 Digit backlit Liquid Crystal Display (LCD)
TP Temperature Module 0-200°C, requires - TP sensor (Digital only)
TH TP/TPO Alarm/controller Harness only (requires SC & TP above) (digital Monitor/controllers only)
PC Power Cord 115 VAC (8 FT. with plug and strain relief) NOT for 230 VAC use
Special Order Options
24VA 24 VAC Isolated Power Supply
24VD 24 VDC Isolated Power Supply
PTS Panel Mounted test Switch
SFP Panel mounted set point adjustment (digital Monitor/controller only
TPA Temperature Module 0-200°C, Above - TP with adjustable hysteresis (digital models only)

HT

 High temperature modification for -HT sensors , range limited (Contact technical sales)

Accessories

Part Number

 Model Description
EQP-MLASI ASI Aquaswitch I fully automatic DI bank system
(Monitor/controller only)I
EQP-MLSCO SCO Second Alarm/Control Module
EQP-ML4AO 4AO 4-20 mA self-powered isolated output module
(digital only)
EQP-ML3SO 3SO 3 Sensor Input Module with 3 ft/1 Meter cable
(customer mounted)
EQP-ML3SE 3SE 3 Sensor Input Module with Enclosure
EQP-ML3CO 3RO 3 Range Switch with 3 ft/1 meter cables
(Add C=Cond )
EQP-ML3CE 3RE 3 Range Switch with enclosure (Add C=Cond)
EQP-ML3SCO 3SRO Above 3SO and 3RO combined (Add C=Cond)
EQP-ML3SCE 3SRE Above 3SO and 3RO with enclosure (Add C=Cond)
EQP-MLPAO PAO 70db Piezo Electric Alarm Only
(digital Monitor/controllers only)
EQP-MLPATO PATO Piezo Alarm & Timer Module
(digital Monitor/controllers only)
EQP-ML35BLO 35BLO 3 1/2 Digit Backlit Liquid Crystal Display (LCD)
EQP-ML45BLO 45BLO 41/2 Digit Backlit Liquid Crystal Display (LCD)
EQP-MLTPO TPO Temperature Module 0-200°C, requires - TP sensor
(digital only) w/harness
EQP-MLTHO THO TP/TPO Alarm/controller Harness only
(requires SCO & TPO above)
EQP-MLTPC TPC Calibration Module (Temperature Module)
EQP-MLPCO PCO Power Cord 115 VAC (8 FT. with plug and strain relief)
NOT for 230 VAC use
EQP-MLSMP50 SMP50 Surface Mounting Plate
EQP-MLRA RA Remote Alarm - RA™ (controller models only)
EQP-MLVR VR Power Supply, 24 VAC, 20 VA
(115 VAC, indoor use only)
EQP-ML024-1 024-1 1 in NPT 24 VAC Solenoid Valve
EQP-MLCS-11 CS-11 20 Megohms Resistivity Calibration Module Sensor substitute )
NIST traceable
EQP-MLCS-14 CS-14 2 Megohms Resistivity Calibration Module Sensor substitute )
NIST traceable
EQP-MLCS-17 CS-17 200 Megohms Resistivity Calibration Module Sensor substitute )
NIST traceable
EQP-MLCC CC NIST Certificate without sensor (C = Cond )
EQP-MLCATF CATF NIST Certificate with out sensor. order after instrument
has shipped (C = Cond)
EQP-MLCCS CCS NIST Certificate with sensor using Standard Solutions
(Conductivit/TDS only)
* Does not fit into enclosure, must be mounted separately.

Sensors shown here

Sensors: CS51LC, CS51 & CS52

These reliable sensors feature an integral
temperature sensor to ensure accurate and rapid automatic temperature compensation. The sturdy polypropylene bushing is modular for easy inexpensive replacement. Several alternatives for the metal portion of the sensor are available,
depending on the demands of the application.

CS51LC sensors (0.1 constant) are used <10
CS51 sensors (1.0 constant) are used between 0-10 and 0-20,000
CS52 sensors (10.0 constant) are used >20,000
Low cost, low temperature, low pressure sensors are available upon request
Specifications:

Temperature Compensation: Integral thermistors
provide automatic TC to 25°C
between 32-212°F (0-100°C).
Pressure/Temp Limits: CS51: 100psi (690kPa) @
212°F (100°C). 250PSIG @ 205°C, Models CS40
& CS41 sensors are available on special order.
Bushing: Modular Polypropylene threaded 3/4"
NPT. 1/2" PVDF or 316 stainless steel fittings
available as option.
Cable: 24 ga. shielded, 10' (3 meters) is
standard. 25' and 100' (8 and 30 meters) lengths
available. 100' is maximum recommended.
Dimensions: CS51: Metal portion 1.2" (30 mm) L; 0.5" (13mm) dia.


Additional Information

Operation Manual click here: PDF

* Does not fit into enclosure, must be mounted separately.


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