THORNTON

Leading Pure Water Analytics

Six Sensor Inputs:

- Conductivity/Resistivity

- pH/ORP

- Flow

- Dissolved Oxygen

- Temperature

- Pressure

- Level

- Total Organic Carbon (TOC)

770MAX

Multiparameter Analyzer Transmitter

2

770MAX Multiparameter Analyzer/Transmitter

Extensive Measurement Capabilities

6 channels: 4 Smart Sensors, including conductivity/resistivity, temperature, flow, pH, ORP, dissolved oxygen, TOC level and pressure, plus 2 pulse flow sensors

Display 16 measurements on 4 line screen with auto or manual scrolling

Metric, S.I., and English units for direct measurements; calculated values for % Rejection, % Recovery, difference, sum, ratio and DI capacity. Custom names identify all measurements

Alarm/Control and Outputs

16 Setpoints for high, low, USP and reset (for totalizer) alarms

4 SPDT relay option within the 1/4 DIN case with individual hysteresis and time delay (optional)

2 Discrete outputs for logic circuits

4 powered analog outputs (0/4-20 mA) standard, 8 optional

RS232 serial output

2 discrete inputs for totalizer reset

Highest Accuracy and Easiest Calibration

Unique 4-wire resistance measurement technique for highest installed accuracy

Thornton’s temperature compensation provides highest accuracy for UPW, cation and ammonia conductivity

NIST-traceable automatic meter calibration system

Direct one and two-point sensor calibration

Smart Sensors retain factory and user calibration data

pH automatic buffer recognition during calibration

Compact Size

1/4 DIN cutout, case only 12 cm deep

Sealed panel mount standard, entire unit sealed with optional back cover

Panel, wall, pipe mounting options

Cost Effective

Low cost per measurement point, with 6 sensor inputs

One panel cutout replaces 6 for single function devices

One instrument - reduces training and spares

Plug-in sensor connections reduce wiring time

770MAX Liquid Crystal Display option

(Vacuum Florescent Display shown on cover)

770MAX Features

Plug-in patch cords eliminate all terminal wiring for Smart

Sensors, at both ends. Gone are the possibilities for sensor wiring errors and extensive documentation. Other inputs and outputs are to pluggable terminals which snap out for ease of installation and servicing.

Unsurpassed temperature compensation algorithms to handle specific applications are user selectable. The renowned

Thornton/Light ultrapure water compensation algorithm uses the best available data for the properties of pure water, while providing compensation for more conductive solutions.

Cation and ammonia/ETA compensation correct for the unique properties of cycle chemistry samples in power plants.

Comprehensive temperature compensation functions for HCl,

NaOH, and H

2

SO

4 are used for DI regeneration. Compensation for glycol and IPA solutions meets the needs of microelectronics applications. Adjustable linear temperature compensation is also available.

Non-temperature compensated measurement is required for monitoring pharmaceutical grade waters by USP <645>.

Further, Stage 1 USP conductivity limits can be alarmed by an application-specific program that also includes a userselectable safety margin.

pH temperature compensation is provided for both the conventional Nernst effects of the sensor as well as for the effects of changing ionization in pure water, with adjustable solution temperature compensation.

Custom names allow assignment of any 6-character label to directly identify each measurement on the display. The names carry through the menu structure for clarity when making settings. Custom names can eliminate the need for special panel legends and can be changed at any time.

Analog Output Signals (4 standard, 4 more - optional) are isolated and include 0-20 or 4-20 mA ranges, with choices of linear, logarithmic, bi-linear or dual output scaling. Linear allows conventional setting of high and low limits.

Other scalings allow high resolution under normal operating conditions but also keep the measurement on-scale for tracking during upsets. Logarithmic allows setting the high end and number of decades. Bi-linear provides separate scaling for the lower and upper halves of the signal range. Dual scaling switches to a second scaling range when the first range is exceeded and activates a relay for range indication.

DICap

™

deionization capacity monitoring is a unique Thornton method to predict the timing of DI resin exhaustion, compensating for both flow rate and variable water composition. It measures deionizer feed flow rate and conductivity and then computes the ionic load that has entered the DI bed. The product of flow rate and TDS is integrated over time to yield this cumulative TDS as total grains or total equivalents.

Multi-level security allows separate access to calibration and to other functions. Menus may still be viewed when security prevents change.

3

4

770MAX Specifications

Functional

Sensor inputs:

Cond./Resist. Ranges:

4 Smart Sensor channels, 2 pulse flow channels

0.01 Constant 2-E Cell: 0.001 µS/cm to 2000 µS/cm 0.5 k

Ω-cm to 1000 MΩ-cm

0.1 Constant 2-E Cell: 0.01 µS/cm to 3000 µS/cm 0.33 k

Ω-cm to 100 MΩ-cm

10 Constant 2-E Cell: 10 µS/cm to 200,000 µS/cm

50 Constant 2-E Cell: 10 µS/cm to 1.0 S/cm

4-E Cell:

TDS:

Concentrations:

10 µS/cm to 800,000 µS/cm

Readout in S/m is selectable covers equivalent conductivity ranges

HCl: 0-15%, NaOH: 0-13%, H

2

SO

4

: 0-20%, by weight pH & ORP Ranges: -1 to 15 pH, -1500 to +1500 mV

Dissolved Oxygen Ranges: 0 to 15,000 ppb or µg/L, 0 to 15 ppm or mg/L, with auto-ranging; o to 100% saturation

TOC Range:

Temperature Ranges:

Flow Ranges:

Pressure Ranges:

Tank Level (volume):

Derived Meas.:

0.1 - 1000 ppb or µg/L C

-40

° to 200 °C, -40 to 392 °F with Pt1000 RTD or Pt100 RTD

Sensor range in GPM, LPM, m

3

/hr, 0.5-4000 Hz

Sensor range in psi, bars, kPa, mmHg, kg/cm

2

, inches, feet

Sensor range in gallons, m 3 , liters, % full, psi, inches, feet

Electrical Ranges:

Temp. Comp.:

Total flow, % rejection, % recovery, sum, difference, ratio, ppm-gallons, total grains

Volts, Amps, based on proportional millivolt signal

Automatic, referenced to 25

°C for Resistivity, Conductivity, Percent Rejection and TDS. Field selectable for standard high purity (Thornton/Light), cation, ammonia/ETA (power industry), isopropyl alcohol, 50 and 100% glycol, HCl,

H

2

SO

4

, NaOH, or Light 84 (special microelectronics applications). pH temperature compensation for Nernst electrode output effects plus adjustable solution temperature compensation for high purity water ionization effects, referenced to 25

°C.

Dissolved Oxygen temperature compensation for membrane permeability and oxygen solubility in water.

Pressure Compensation: Dissolved Oxygen compensation for atmosphere pressure during calibration using barometer in preamp. Pressure read out available in bar or mmHg.

Discrete Inputs: Two standard, buffered TTL/CMOS level or dry (potential-free) contacts for resetting total flow or total grains measurements.

Outputs

Setpoints/Alarms:

Relays:

Discrete Outputs:

Analog Output Signals:

16, set individually as high, low, reset, or USP <645> limit on any measurement. Any relay or discrete output can be programmed to operate from multiple setpoints.

Optional, 4 SPDT potential-free relays, rated 5 amp max. resistive load up to 30 VDC or 250 VAC.

Two standard, buffered TTL/CMOS level.

Four standard plus four optional, powered 0/4-20 mA outputs, 500 ohm load maximum, isolated from input and from earth ground; accuracy ± 0.05 mA, typical. Outputs are assignable to any measurement with free scaling in linear, bi-linear, logarithmic, or dual range format. Not for use in powered circuits.

RS232 standard, maximum distance 50 feet, field selectable up to 38.4 kbaud.

Serial Output:

Performance

Resistance accuracy: ± 0.3% of reading, 1000 ohms to 6 Mohms; ± 0.5% of reading, 6 M to 10 Mohms; ±1% of reading or ± 0.5 ohm,

Repeatability: whichever is greater, 10 to 1000 ohms. (divide by cell constant for resistivity range)

Voltage/Temp accuracy: ± 3 mV, ± 0.02 pH, ± 0.2 °C, See sensor specs for dissolved oxygen

Frequency accuracy: ± 0.1% or ± 0.001 Hz, whichever is greater

± 0.02% of reading,1000 to 10 Mohms; ± 0.8% of reading, 10 to 1000 ohms for conductivity/resistivity; ± 0.05

°C;

± 0.02 pH; ± 0.3 mV

Ratings/Approvals: Models 775-_A0 & _D_ are CE compliant. All models are UL and cUL (CSA Standards) Recognized.

Environmental

Temperature: Storage: -20

° to 80 °C (-4° to 176 °F)

Operating:

Model

775-_A0

115 VAC & 24 VDC Power 230 VAC Power

-10°C to 50°C (14 to 122°F) -10° to 50°C (14 to 122°F)

775-_A1 -10°C to 50°C (14 to 122°F) -10° to 40°C (14 to 104°F)

775-_A2 -10°C to 40°C (14 to 122°F) -10° to 40°C (14 to 104°F)

Humidity:

Enclosure/Power

0 to 95% RH (non-condensing)

Display/keypad:

Material/Weight:

Rating:

Panel Cutout:

Wall Mount:

Pipe Mount:

20 character x 4 line backlit LCD or vacuum fluorescent; 20 tactile feedback keys

ABS-PC alloy, UV and chemical resistant; 2 lbs. (0.9 kg)

NEMA 4X, panel mounting; sealed back cover also available.

3.78" x 3.78" (96 x 96 mm) 1/4 DIN

With accessory back cover, 8.84 x 4.82” (225 x 123 mm) overall

With accessory bracket for 2” (50.8mm) pipe

Sensor Patch Cord Length: 300 feet (91 m) maximum, 150 feet (45 m) maximum for pressure and level sensors. Reduced accuracy with

4-E sensors only at high conductivity with patch cords >50 feet (15 m).

Power: 100-240 VAC 20 Watts max., 47-63 Hz; 20-32 VDC 30 Watts max. Stored values are retained in non-volatile memory without batteries.

770MAX Smart Sensors

Smart Sensors

Smart Sensors used with 770MAX have sensor type, calibration data and serial number factory-stored in memory for automatic configuration when connected - a great simplification at startup. Smart sensors are available for a wide variety of parameters described below. For further information see specific sensor data sheets: ML0072 for conductivity; ML0074 for pH, ORP, dissolved oxygen, flow, pressure, level & temperature; and ML0073 for sanitary sensors.

Conductivity/Resistivity

Thornton provides a full complement of Smart conductivity sensors with NPT or Tri-Clamp sanitary fittings. They include various lengths, cell constants and materials to match the application: titanium concentric electrodes for high purity water; highly polished 316L SS electrodes for pharmaceutical waters; CPVC and PEEK sensors with four flush electrodes for solutions with higher conductivity and/or suspended material; and an epoxy sensor which can also measure chemical concentration. Precise factory calibration of each cell constant and RTD is stored in sensor memory for use by the 770MAX when connected.

Optimized 4-wire measuring circuitry provides exceptional rangeability and accuracy, eliminating cable effects.

completely controlled through a standard 770MAX instrument. Along with TOC, sample conductivity or resistivity and temperature can be measured and displayed. TOC measurement is made in a variety of pure and ultrapure water applications.

Dissolved Oxygen

Thornton provides a choice of reliable Smart dissolved oxygen sensors especially for measurement in high purity ranges. The high-performance sensor provides especially high accuracy and fast down-scale response. The long life sensor is an industry-proven design that can operate several years without any internal maintenance or replacing any parts. Sensor preamplifiers include barometric pressure measurement and correction during calibration.

Flow

Smart Sensors for flow include a variety of paddlewheel, vortex shedding, and sanitary turbine types to meet the needs of most applications. Smart flow sensors convey their precalibrated values to 770MAX for ease of installation and startup. Many Smart flow sensors have multiple calibration factors saved in memory, for linearization of response and higher accuracy.

pH & ORP

pH and ORP (oxidation-reduction potential) sensors utilize a compact preamplifier in the Smart module on the sensor or VP cable to prevent signal loss over long cable runs. A wide variety of Mettler-Toledo pH electrodes with

VP connection can meet diverse application requirements.

Smooth membrane surfaces and unique reference junction designs resist fouling in dirty samples. The high purity pH assembly uses a shielded flow chamber and flowing junction reference electrode for stable measurement and a 3way valve for in-line calibration.

A choice of English or metric flow units may also be totalized, with internal or external reset. Flow comparisons between two sensors include difference, ratio, and % recovery.

Pressure and Tank Level

Smart level and pressure sensors are available with sanitary and NPT connections in stainless steel and polymers to meet process requirements. The 770MAX allows very convenient calibration after installation. Level units can be % full, height or volume. A wide variety of English and metric pressure units are available.

5000 Total Organic Carbon (TOC)

The 5000TOC sensor utilizes UV Oxidation and Differential

Conductivity in conjunction with the 770MAX instrument to perform TOC measurements. Smart cable technology is employed allowing interface with the TOC sensor through standard 770MAX patch cables. Sensor functionality is

Temperature

Stand-alone Smart Temperature Sensors are available with industrial or Tri-Clamp sanitary fittings, of stainless steel.

5

770MAX Applications

Membrane Process

A single 770MAX can handle pretreatment and all important membrane performance measurements including % rejection and % recovery.

1 2

3

4 5

TOC

ORP (or pH)

Conductivity/

Temperature

Pressure

6

Flow

Flow

Conductivity/

Resistivity

SENSOR/CHANNELS

1

2

Conductivity

Conductivity

DISPLAY MEASUREMENTS

A Feed Resistivity

B Feed Temperature

C Feed TDS

D % Rejection

E Product Conductivity

F Feed pH or ORP (Chlorine)

G Membrane Pressure

SETPOINTS

High Feed Conductivity

High pH or ORP

High pH or ORP

Low Pressure

High Product Conductivity

Low % Rejection

Low Product Flow

3

4

pH or ORP

Pressure

5

6

Flow

H Product Flow

I % Recovery

Flow

J Reject Flow

TOC also available to monitor organic levels of product water from some membrane processes.

RELAYS

High/Low pH or ORP

High Product Conductivity

Low % Rejection

Low Product Flow

ANALOG OUTPUTS

Product Conductivity

% Rejection

Product Flow

Reject Flow

6

Power Plant Cycle Chemistry Monitoring

770MAX measures the common parameters of cycle chemistry samples in a single unit. Highly accurate cation conductivity temperature compensation assures close surveillance of this most important parameter.

2

Conductivity

Cation

Exchange

Column

Economizer

Inlet Sample

SENSOR/CHANNELS

1

Conductivity

2

Conductivity

3

pH

4

ORP or DO

Conductivity/

Temperature

1

DISPLAY MEASUREMENTS

A

B

Specific Conductivity

Temperature

C Cation Conductivity

D pH

E ORP or Dissolved Oxygen

3

ORP or DO

4

pH

SETPOINTS

High Specific Conductivity

Low Specific Conductivity

High Temperature

High Cation Conductivity

Low pH

High pH

RELAYS

High/Low Specific Conductivity

High Temperature

High Cation Conductivity

High/Low pH

ANALOG OUTPUTS

Specific Conductivity

Cation Conductivity pH

ORP

770MAX Applications

Deionization Process

770MAX readily monitors & controls deionization process. Ionic loading on the DI resin can be tracked by Thornton’s unique DICap TM deionization capacity monitoring which integrates flow and TDS to yield total grains or total equivalents.

1

Conductivity/

Resistivity

TOC

• TOC also available to monitor organic

levels of D.I. loop supply and return.

D.I. Loop

Return

D.I. Storage

Deionization

2

3

TOC

Conductivity/

Resistivity

Flow

6

To points of use

TDS

4

Flow

5

Level

SENSOR/CHANNELS

1

2

Conductivity/

Resistivity

Level

3

Conductivity/

Resistivity

4

Conductivity

DISPLAY MEASUREMENTS

A DI Conductivity or Resistivity

B DI Level

C Process DI Resistivity

5

Flow

6

Flow

D Feed Temperature

E Feed TDS

F DICap

™ Total Grains

G Feed Flowrate

H Flowrate

Dissolved Oxygen also available to monitor degasifier performance.

SETPOINTS

Low DI Resistivity

High Level

Low Process Resistivity

High TDS

High Total Grains

Reset Total Grains

RELAYS

High DI Conductivity

Level Control

Recirc. Process Resistivity

High Total Grains or High TDS

ANALOG OUTPUTS

DI Resistivity

Feed Flow

Feed TDS

Total Grains

Pharmaceutical Waters

A single 770MAX monitors a still & distribution system. Additional 770MAX units can monitor conductivity & flow at each production area, to ensure compliance with USP requirements.

770MAX simultaneously measures temperature, temperature compensated and uncompensated conductivity, which can be alarmed by the limits contained in 770MAX software as specified by USP <645>.

Still

1

Flow

Level

5

Conductivity

2

4

Conductivity

TOC

Conductivity

3

Flow

6

TOC

Line 1

1 4

Line 2

2 5

3

Line 3

6

4

5

6

1

2

3

770MAX - UNIT 2

SENSOR/CHANNELS

Conductivty

Conductivty

Conductivty

Flow

Flow

Flow

770MAX - UNIT 1

SENSOR/CHANNELS DISPLAY MEASUREMENTS SETPOINTS RELAYS

1

2

3

4

5

6

Conductivity

Level

Conductivity

Conductivity

Flow

Flow

I

A

B

C

D

E

F

G

H

L

J

K

M

Distillate Condutivity

Distillate Condutivity U

Distillate Temperature

Storage Level

Supply Conductivty

Supply Conductivty U

Supply Temperature

Return Conductivty

Return Conductivty U

Return Temperature

Distillate Flow

Total Distillate Flow

Supply Flow

TOC measurement also available to monitor organic contamination levels of distribution loop water supply and return.

USP Still Conductivity

Low Level

High Level

USP Supply

Conductivity

High Still Conductivty

Low Level

USP Supply or Return

Conductivity

Low Supply or Return

Temperature

USP Supply

Temperature

Low Return

Conductivity

Low Return

Temperature

Low Still Flow

ANALOG OUTPUTS

Still Flow

Supply Conductivity

Supply Flow

Return Conductivity

U = Non-temperature Compensated

Conductivity as specified in USP <645>.

7

770MAX Applications & Dimensions

8

Wastewater Treatment

770MAX can divert reusable water before treatment based on conductivity and/or TOC. It can control neutralization and monitor effluent, to meet discharge requirements - all using the same instrument.

5

Flow

Acid Caustic

Wastewater

TOC

6

1

Conductivity

Reclaim/

Recycle

2

pH

3

Flow

4

pH

SENSOR/CHANNELS

1

Conductivity

2

pH

3

Flow

4

pH

5

Flow

6

TOC

DISPLAY MEASUREMENTS

A Waste Conductivity

B Waste TDS

C Control pH

D Effluent Flow

E Total Flow

F Effluent pH

G Effluent Temperature

H Recycle Flow

I Total Flow

J Effluent TOC

ANALOG OUTPUTS

• Effluent pH

• Effluent Temperature

• Effluent Flow

• Total Effluent Flow

• Effluent TOC

SETPOINTS

• High Waste Conductivity

• High Control pH

• Low Control pH

• High Effluent pH

• Low Effluent pH

• High Effluent TOC

RELAYS

• High Waste Conductivity

• High Control pH

• Low Control pH

• High/Low Effluent pH

• High Effluent TOC

770MAX Dimensions Panel Cutout

4.92

(125.0)

4.50

(114.3)

1.78

(45.3)

6.39

(162.4)

4.61

(117.1)

4.19

(106.4)

4.92

(125.0)

3.78

(96.0)

3.62

(92.0)

.57 (14.5)

.36 (9.1)

3.97

(100.7)

.09 (2.4)

φ .17 (4.3),

4 places

4.39

(111.4)

.30 (7.7)

3.78 (96.0)

4.50 (114.3)

770MAX with Sealed Rear Cover

1.29 (32.7)

.30 (7.6)

4.82 (122.6)

2.25

(57.2)

.58 (14.8)

.98 (25.0)

8.16 (207.3)

4.30 (109.2)

2.15

(54.6)

8.84

(224.6)

8.24

(209.3)

4.92

(125.0)

7.67

(194.9)

.16 (4.1)

4.50

(114.3)

φ .20 (5.1), 4 Places

Dimensions: inches (mm)

770MAX Ordering Information

Model numbers (e.g. model 775-LA0 has a liquid crystal display, AC power and 4 analog outputs)

775 -

Output option

0 - 4 analog outputs

1 - 4 analog outputs, 4 relays

2 - 8 analog outputs, 4 relays

Power

A - 100-240 VAC

D - 20-32 VDC

Display option

L - backlit liquid crystal display

V - vacuum florescent display

(775-XA0 and 775-XDX models are CE compliant)

Sensor Patch Cords

Length Standard Part No.

1 ft (0.3 m)

5 ft (1.5 m)

10 ft (3 m)

15 ft (4.5 m)

25 ft (7.6 m)

50 ft (15.2 m)

100 ft (30.5 m)

150 ft (45.7 m)

200 ft (61 m)

300 ft (91 m)

1001-79

1005-79

1010-79

1015-79

1025-79

1050-79

1100-79

1115-79

1120-79

1130-79

Patch cord with connector at both ends, for 770MAX and Smart Sensors.

Not used with pulse input flow sensors.

Observe length limitations of some sensors.

Accessories

Description

Rear cover for wall mounting and rear seal (requires Cable Grip Kit, 1000-80, or conduit)

Cable Grip Kit – One kit seals two cables into the rear cover above, with fittings large enough to accept patch cord connector or other cable 0.546 (13.8 mm) maximum diameter.

Pipe Mounting Bracket for 2” (50 mm) pipe

Automatic Smart Calibrator Kit (for 770MAX)

Portable Conductivity/Resistivity Calibration System (for system including sensor)

For 770MAX Sensors, see datasheets:

Conductivity/Resistivity Sensors

pH, ORP, dissolved oxygen, flow, pressure, level, temperature

Sanitary Tri-Clamp sensors

5000TOC Sensor

ML0072

ML0074

ML0073

ML0103

15540

Pipe Mount Kit

1000-69

Rear Cover

Part No.

1000-69

1000-80

15540

1875

1885

9

10

770MAX 1875 Smart Calibrator

1875 Automatic Smart Calibrator

At the push of a button, the 1875 calibrator automatically steps through NIST-traceable reference resistances, voltages and frequencies to calibrate and verify all ranges of the 770MAX to meet QA requirements and ensure highest accuracy performance. Digital communication conveys precise calibration values to the instrument and confirms that verification values are measured within tolerance.* Results of sequential 770MAX calibrations are retained in the calibrators memory with a real time clock to allow subsequent downloading to a PC for printout of calibration certificates.

Software and cables are included.

An interconnect cable is supplied to connect the calibrator to the instrument. The 770MAX 4-wire resistance measuring technique eliminates patch cord resistance effects.

* US Patent No. 5,248,933

Resistance Accuracy:

± 0.05% except ± 0.075% for 1 -10 Mohm

Temperature Accuracy:

± 0.1 °C

Frequency Accuracy:

Voltage Accuracy:

± 0.03%

± 0.5 mV

NIST traceability:

documented on certificate of calibration for calibrator

Ambient temperature:

20-40°C for rated accuracy

Memory capacity:

20 channels of calibration and/or verification

(770MAX has 4 smart channels per instrument)

Power Supply rating:

Dimensions:

90-264 V, 47-63 Hz; CE compliant, CSA rated, UL listed

7.7 x 4.0 x 1.6” (195 x 100 x 40 mm)

The 1875 Kit includes:

Smart Automatic Calibrator with certificate of calibration

- Calibrator-to-MAX Cable, connects to smart channel input, 5 ft (1.5 m)

- RS232 DB9 cable for connection to computer port

- MAX Certificate Management Program for

Windows 95 or higher on 3.5" disk

(approx. 0.5 MB)

- Modular power supply and cable, used when

Calibrator is not connected to a 770MAX, during download to the computer.

770MAX

*** Certificate of Recalibration ***

----------------------------------------------------------------------------------

Thornton Inc., an ISO9001 certified company, hereby certifies that the item below will meet or exceed all published measurement specifications when calibrated in accordance with the referenced procedure as indicated by Pass/Fail below. The calibration procedures for the Smart Calibrator comply with ISO

10012. The standards used are traceable to the National Institute of Standards and Technology (NIST).

----------------------------------------------------------------------------------

DATE OF CAL: _________________

MODEL NUMBER: _________________ CAL. REFERENCE PER: Factory Procedure TP97201

SERIAL NUMBER: _________________

E

MEASUREMENT CHANNEL: 1

*** Calibration Standards ****

MAKE: Thornton Inc. 1875 Smart Calibrator V1.04

0-1Mohm >1Mohm

L

RES/TEMP RES/TEMP VOLTAGE FREQUENCY

SERIAL# ACCURACY ACCURACY ACCURACY ACCURACY DUE DATE

387053 +/- 0.050% +/- 0.075% +/- 0.5mV +/- 0.03% 08-Apr-02

INPUT DEVIATION MEASURED DEVIATION

VALUE BEFORE P/F AFTER VALUE AFTER LIMIT P/F

RANGE:(Ohms) 1 3976154.0 0.00% PASS 3976154.0 0.00% +/- 0.30% PASS

RANGE:(Ohms) 2 157574.0 0.04% PASS 157574.0 0.00% +/- 0.30% PASS

RANGE:(Ohms) 4 9.993 0.09% PASS 9.993 0.00% +/- 0.30% PASS

TEMP:(Ohms) 1001.1 0.01% PASS 1001.1 0.00% +/- 0.20% PASS

VOLTAGE:(Volts) 1.3350 0.1mV PASS 1.3350 0.0mV +/- 2.00mV PASS

FREQUENCY:(Hz) 99.992 0.00% PASS 99.992 0.00% +/- 0.03% PASS

RANGE:(Ohms) 1 157574.0 -0.00% PASS 157574.0 0.00% +/- 0.30% PASS

RANGE:(Ohms) 2 6958.3 -0.01% PASS 6958.3 0.00% +/- 0.30% PASS

RANGE:(Ohms) 3 498.6 -0.01% PASS 498.6 0.00% +/- 0.30% PASS

RANGE:(Ohms) 4 498.6 -0.31% FAIL* 498.6 0.00% +/- 0.30% PASS

TEMP:(Ohms) 1391.5 0.00% PASS 1391.5 0.00% +/- 0.20% PASS

S

FREQUENCY:(Hz) 1001.7 0.00% PASS 1001.7 0.00% +/- 0.03% PASS

VALUE BEFORE P/F AFTER VALUE AFTER LIMIT P/F

RANGE:(Ohms) 1 1805661.0 0.00% PASS 1805645.0 0.00% +/- 0.30% PASS

RANGE:(Ohms) 2 24924.9 0.00% PASS 24923.9 -0.00% +/- 0.30% PASS

RANGE:(Ohms) 3 1391.5 -0.00% PASS 1391.5 0.00% +/- 0.30% PASS

RANGE:(Ohms) 4 199.9 0.03% PASS 199.6 -0.02% +/- 0.30% PASS

TEMP:(Ohms) 1097.1 0.00% PASS 1097.0 -0.00% +/- 0.20% PASS

VOLTAGE:(Volts) 0.6679 0.3mV PASS 0.6681 0.2mV +/- 2.00mV PASS

FREQUENCY:(Hz) 500.3 0.00% PASS 500.3 0.00% +/- 0.03% PASS

Note:

Measurement certification consists of one page per channel

770MAX 1885 Portable Calibration System

1885 Portable Conductivity/Resistivity Calibration System

The 1885 Portable Conductivity/Resistivity Calibration System enables verification of in-line sensors, without shutting down the process.

Principal of Operation

It is a standard practice to determine the cell constant of a sensor by comparing the reading of that sensor to the reading of a sensor with a known, certified cell constant.

This procedure is described in ASTM D5391 and USP

<645>. A key reason that this method is used by these standards organizations is the lack of accurate and stable liquid standards in the pure and ultrapure water ranges

(less than 100

µS/cm).

The 1885 Calibration System includes the 230-211

Smart Sensor

TM as the reference conductivity sensor, with a certified and traceable cell constant of ± 1% and a temperature detector of ± 0.1 °C at 25 °C. This reference sensor, mounted in a sealed flow chamber and connected to a Thornton 770MAX Instrument, measures a sidestream sample, delivered through user-supplied tubing.

The 770MAX compensates and displays the sensor signal. The 770MAX would have been previously calibrated using the 1875 Smart Calibrator or better conductivity accuracy.

TM which has ± 0.075%

Thornton Factory Calibration

Thornton has an extensive ISO 9001 controlled QC procedure for certifying reference conductivity sensors and temperature compensators. First, cell constants for

Thornton’s transfer standard sensors are determined by using ASTM D1125 standard solutions C and D at 25 °C.

Then, these cell constants are verified in a flowing high purity water loop at three precisely measured temperatures

(15, 25 and 40 °C), which are effectively three different high purity standards. While in the loop, the RTDs in the transfer standard cells are calibrated at 25°C, based on

NIST-traceable temperature sensors.

Next, production conductivity sensors are installed into the high purity loop, where temperature is controlled to 25 °C, along side the standard transfer sensors. Each production sensor cell constant is determined. The production sensor RTD is calibrated in the same manner. To complete the calibration process, a dedicated computer logs the readings, calculates the calibration cell constants, and generates a certificate of accuracy.

1885 components are then factory calibrated as a system, resulting in a typical total system accuracy of ±1% of reading near 25 °C. For additional information see

770MAX Instrument and 1875 Calibrator specifications and conductivity sensor datasheet ML0072.

The 1885 Kit includes:

- 775-VA0: 770MAX with line cord

- 230-211: Smart Conductivity Sensor

- 1000-30: Stainless Steel Flow Chamber with 1/8” NPTF ports

- 1005-79: (2) Patch Cords 5 ft. (1.6 m)

- 1875: Automatic Smart Calibrator

- 13339: Carrying Case

- CAL-40: System Calibration, with report

The user supplies appropriate fittings and tubing between the flow chamber and the process take-off port. The length should be as short as possible, less than 3 ft. (1 m).

Pure Water System

Process Flow

Sample Take-off Port

In-line

Sensor

Calibrated

In-line

Instrument

1885 Portable

Conductivity/Resistivity

Calibration Kit

Factory Certified

Reference

Sensor

Flow

Chamber

Thornton 770MAX

Calibrated

Reference

Instrument to Drain

11

770MAX Multiparameter Analyzer/Transmitter

ISO

9001 certified

For the most current product information visit:

www.thorntoninc.com

Mettler-Toledo Thornton, Inc.

36 Middlesex Turnpike

Bedford, MA 01730 USA

Telephone: +1-781-301-8600

Toll-Free: 1-800-510-PURE

Customer/Technical Service

Telephone: +1-781-301-8690

Toll-Free: 1-800-642-4418

Cust Service Fax: +1-781-271-0214

Tech Service Fax: +1-781-271-0675

© Mettler-Toledo Thornton, Inc. – Subject to Technical Changes email: [email protected]

www.thorntoninc.com

ML0067 Rev.J 02/05