EUTECH INSTRUMENTS CON 700 - REV 2 User manual

Instruction Manual

CON 700 Conductivity/ºC/ºF Bench Meter

Technolo

ade

Part of Thermo Fisher Scientific 68X541702 Rev. 2 Jan 2010

TABLE OF CONTENTS

1. INTRODUCTION.............................................................. 1

2. GETTING STARTED........................................................ 2

2.1 Keypad Functions ...................................................................2

2.2 LCD Annunciators...................................................................3

2.3 Meter Connections..................................................................3

3. ELECTRODE INFORMATION......................................... 4

4. CALIBRATION................................................................. 4

4.1 Automatic or Manual Calibration.............................................4

4.2 Single or Multi-Point Calibration..............................................5

4.3 General Calibration Tips .........................................................6

4.4 Automatic Conductivity Calibration Procedure........................6

4.5 Manual Conductivity & TDS Calibration Procedure.................7

4.6 Temperature Calibration .........................................................7

5. MEASUREMENT.............................................................. 7

5.1 Taking Measurements.............................................................7

5.2 Automatic and Manual Ranging..............................................8

5.3 HOLD Function .......................................................................8

5.4 Storing and Recalling Data .....................................................8

6. SETUP FUNCTIONS........................................................ 9

6.1 P1.0 CAL (Calibration)............................................................9

6.2 P2.0 ELE (Electrode Information)............................................9

6.3 P3.0 ConF (Configuration) ......................................................9

6.4 P3.1 rdY (Ready / Stability Indicator)......................................9

6.5 P3.2 ºC ºF (Celcius Or Fahrenheit).........................................10

6.6 P3.3 AtC (Automatic Temperature Compensation).................10

6.7 P3.4 tdS (Total Dissolved Solids factor)..................................10

6.8 P3.5 t.CO (Temperature Coefficient).......................................10

6.9 P3.6 t.nr (Normalization Temperature in ºC)...........................11

6.10 ACAL (Automatic Conductivity Calibration).............................11

6.11 SPC (Single Point Calibration)................................................11

6.12 CELL (Nominal Cell Constant)................................................11

6.13 P4.0 rSt (Reset) .....................................................................12

6.14 P5.0 CLr (Clear Memory).......................................................12

7. CALCULATING TDS CONVERSION FACTOR.............. 13

8. CALCULATING TEMPERATURE COEFFICIENTS........ 14

9. REPLACEMENTS AND ACCESSORIES........................ 15

10. TROUBLESHOOTING GUIDE......................................... 16

11. SPECIFICATIONS............................................................ 17

12. WARRANTY..................................................................... 18

13. RETURN OF ITEMS......................................................... 18

1. INTRODUCTION

Thank you for purchasing our Con 700 series benchtop meter.

This microprocessor-based meter is economical and simple to

use. The design incorporates a large LCD for clear viewing, yet

offers a small footprint to conserve space.

The CON 700 measures conductivity or TDS, and temperature

(ºC or ºF) simultaneously.

Each meter includes a convenient slide-out card for quick

reference.

Some configurations include an electrode arm and metal

bracket which can be easily attached to the left or right side of

the meter according to your preference.

The CON 700 series benchtop meter replaces our popular CON

510 series meter that was introduced in 2002.

We take great pride in every instrument we manufacture

and hope this one serves you well.

2. GETTING STARTED

2.1 Keypad Functions

Powers the meter on and off. Upon power on, the meter

automatically begins in the mode that was last used.

Calibration and memory values are retained even if meter

is unplugged.

Toggle between available measurement modes—

Conductivity with Temperature or TDS with Temperature.

Also used to switch to Temperature calibration during

Conductivity or TDS calibration mode.

Press and hold for 5 seconds to enter SETUP mode.

Toggles between measurement and calibration modes.

In SETUP mode, returns user to the measurement mode.

Confirms calibration values in CAL mode.

Confirms selections in SETUP mode.

Changes range and resolution in MEAS mode.

View recalled values in memory mode.

MI (Memory Insert) stores values into memory.

SIncrease value. Scroll up in SETUP & CAL modes.

MR (Memory Recall) recalls values from memory

TDecrease value. Scroll down in SETUP & CAL modes.

Freezes measured reading. Press again to resume

live reading.

2.2 LCD Annunciators

2.3 Meter Connections

CON/

Temp 8-pin DIN connection for 2-cell Con/TDS/Temp electrode

DC Power supply

3. ELECTRODE INFORMATION

The CON700 includes an electrode with a nominal cell constant of

k = 1.0, built-in temperature sensor, and 1 meter cable. The Ultem

body housing has good chemical resistant properties. The

electrode design offers fast temperature response and reduces air

entrapment, ensuring accurate, repeatable, and stable readings.

The wetted materials of the probe include:

•Polyetherimide (Ultem) – protective probe guard

•Polybutylterphalate (Valox) – sensor housing

•Stainless Steel (SS 304) – 2 bands

The protective probe guard can be removed temporarily for

cleaning however it must be re-attached during measurement and

calibration. Erroneous results will occur while the probe guard

is removed.

Always immerse the probe beyond upper steel band for best

results. Use the fill line on the outside of the probe guard for

reference.

4. CALIBRATION

4.1 Automatic or Manual Calibration

The CON 700 is capable of automatic or manual calibration for

n the

TABLE 1, the CON 700

must be set for manual calibration instead.

conductivity, and manual calibration for TDS.

In the automatic calibration mode, the meter will automatically select

one of (4) conductivity calibration standard values depending o

range and normalization temperature being used (TABLE 1).

If you only use calibration standards that are listed in TABLE 1,

automatic calibration is recommended. If you intend to calibrate with

one or more standards that are not listed in

The factory default is automatic conductivity calibration. See Section

6.10 to change this setting. There is no automatic calibration value

available for conductivity range 1.

TABLE 1

Automatic Calibration Values

Normalization Temperature

Range

# Conductivity

Range 25 ºC 20 ºC

r 1 0.00 – 20.00 μS None None

r 2 20.1 – 200.0 μS 84 μS 76 μS

r 3 201 – 2000 μS 1413 μS 1278 μS

r 4 2.01 – 20.00 mS 12.88 mS 11.67 mS

r 5 20.1 – 200.0 mS 111.8 mS 102.1 mS

Range

# TDS Range

(using 0.5 TDS factor) Automatic Calibration

Values

r 1 0 – 10.00 ppm none

r 2 10.1 – 100.0 ppm none

r 3 101 – 1000 ppm none

r 4 1.01 – 10.00 ppt none

r 5 10.1 – 100 ppt none

4.2 Single or Multi-Point Calibration

Use Single-Point Calibration to apply a single calibration value across

all ranges.

Use Multi-Point Calibration for individual calibration in each range. This

will restrict an individual calibration so that it is applied to one range

only. When using multi-point calibration, perform a calibration in each

range that you expect to use for best results.

The factory default is Single-Point Calibration. See Section 6.11 to

change this setting.

4.3 General Calibration Tips

For best results, periodic calibration with known accurate standards is

recommended. A maximum of one calibration point per range can be

performed. If multiple calibration points are used in the same range,

the most recent one will replace the previous one.

When the electrode is replaced, it is best to clear the calibration to the

factory default values (see Section 6.13).

Rinse or immerse the probe before calibration and between samples

with clean water (deionized water is ideal).

The CON 700 has non-volatile memory which will retain all calibration

values, as well as meter settings and memory values upon meter shut

down or unexpected power loss.

To protect from erroneous calibrations, the allowable tolerance is ±40%

of the factory default value.

Low conductivity standard solutions (less than 20 µS) are unstable and

are very temperature dependent. As a result, reproducible calibration

results are challenging in lowest measurement range #1 (0.00 to 20.0

µS).

4.4 Automatic Conductivity Calibration Procedure

1) Press as needed to select conductivity (μS or mS).

2) Dip the electrode into the conductivity standard and press .

Provide stirring for best results.

3) The primary display will show the factory default value, while the

secondary display will lock on the appropriate automatic standard

value from TABLE 1.

4) When the READY indicator appears, press to accept. The

primary reading will flash briefly before returning to measurement

mode upon successful calibration.

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