LaMotte SALT Testr User Manual

Page 2

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TTTTTo be

o be

o begin automa

gin automa

gin automatic calibr

tic calibr

tic calibraaaaation:

tion:

1. Switch on the tester. Make sure the tester is in measuring mode. Press INC

INC

INC or

DEC

DEC key to enter conductivity calibration mode.

2. ‘CAL’ indicator appears in LCD. The display briefly shows ‘CAL’ and the number

of points the tester will be calibrated.

3. The upper display shows the conductivity reading and the lower display

sequentially shows calibration standard values 1413 uS & 12.88 mS (for

ECTestr11) or 84 uS, 1413 uS & 12.88 mS (for ECTestr11+) if the

measuring range of the tester is set to AUTO.

Figure 7: Two-point automatic calibration sequence for ECTestr11

TTTTTo ena

o ena

o enabbbbble/disa

le/disa

le/disabbbbble auto calibr

le auto calibr

le auto calibraaaaation and m

tion and m

tion and multi-point calibr

ulti-point calibr

ulti-point calibraaaaation:

tion:

1. Switch off the tester. Press and hold INC

INC

INC key and then switch on the tester using

ON/OFF

ON/OFF key.

2. The tester goes to auto calibration selection mode. The lower display shows ‘A.CAL’

and the upper display blinks the current choice (‘Yes’ or ‘No’).

Note:

Note: This mode is available only for ECTestr11 & ECTestr11+ models. For other

models, go directly to 1-point selection mode, described in step 4 below.

Press INC

INC

INC or DEC

DEC

DEC key to select ‘Yes’ (to enable auto calibration) or ‘No’ (to disable

auto calibration)

Note:

Note: Press °C/°F

°C/°F

°C/°F key, if you wish to skip this setting without confirming changes.

Note

Note: Press °C/°F

°C/°F

°C/°F key twice, if you wish to return to measurement mode without

confirming changes.

3. Press HOLD/ENT

HOLD/ENT

HOLD/ENT key to confirm the selection. The display shows ‘CO’.

4. The tester goes to 1-point calibration selection mode. The lower display shows

‘1.Pnt’ and the upper display blinks the current choice (‘Yes’ or ‘No’).

Press INC

INC

INC or DEC

DEC

DEC key to select ‘Yes’ (to enable 1-point calibration) or ‘No’ (to

disable 1-point calibration, i.e. to enable multi-point calibration).

Note:

Note: Press °C/°F

°C/°F

°C/°F key if you wish to skip this setting without confirming.

5. Press HOLD/ENT

HOLD/ENT

HOLD/ENT key to confirm the selection. The display shows ‘CO’ for few

seconds and then shows power-up sequence The tester goes to measurement

mode.

Figure 6: Selecting auto calibrtaion & 1-point calibration for ECTestr11+

Auto Calibration

Auto calibration feature is available only for conductivity in ECTestr11 &

ECTestr11+ models. Make sure that ‘auto calibration’ is enabled as described in

the previous section. Auto calibration is suitable if you use standard conductivity

solutions for calibration process.

If you selected 1-point calibration, you need to choose a calibration standard

corresponds to the selected measuring range of the tester listed below. If you

have selected multi-point calibration & AUTO measuring range, you can choose any

of the calibration standards listed below. During auto calibration, the tester

recognizes the calibration standard if its value is within 50% tolerance. For multi-

point calibration (with AUTO measuring range), the tester automatically scans

through all possible calibration points until all of them are calibrated.

TTTTTo pr

o pr

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tion standar

tion standards:

ds:

Use fresh calibration standard solutions listed in the above table. Prepare each

solution in two beakers - one for rinsing and the other for calibration. Rinse the

electrode in de-ionized water before calibration.

Selected Measuring Range

Calibration Standard

PU (0 to 200.0 uS/cm)

84 us

LO (0 to 2000 uS/cm)

1413 uS

HI (0 to 20.00 mS/cm)

12.88 mS

AUTO

84 us, 1413 uS, 12.88 mS

Note:

Note: If you have selected a specific measuring range for the tester, the lower display

shows the corresponding calibration standard value that matches the selected

measuring range.

4. Rinse the electrode with the calibration standard that you intend to calibrate and

then dip the electrode in the other beaker with same calibration standard. Swirl

gently to create a homogenous sample and allow time for the reading to stabilize.

Note:

Note: For multi-point calibration, the lower display automatically locks at the

calibration standard value that closely matches. The tolerance range is ± 50% of

the calibration standard. The tester shows error message ‘Er.1’ if you try to calibrate

with a solution whose conductivity is outside the tolerance range.

Note:

Note: Press INC

INC

INC or DEC

DEC

DEC key if you wish to exit from auto calibration, during any of

the above steps.

5. Press HOLD/ENT

HOLD/ENT

HOLD/ENT key to confirm the calibration. LCD shows ‘CO’ for 2 seconds. The

calibration is complete and the tester returns to measurement mode, if this is a 1-

point calibration.

6. For multi-point calibration, the tester goes to the next calibration point, lower

display showing next calibration standard values. Rinse the electrode in de-ionized

water and repeat step 4 & 5 to continue calibrating with next calibration standard

solution.

Note:

Note: The tester shows error message ‘Er.0’ and returns to measuring mode if the

temperature of the calibration solution is not within 0°C to 50°C.

Note:

Note: The tester shows error message ‘Er.1’ if you press HOLD/ENT

HOLD/ENT

HOLD/ENT key before the

tester recognizes the calibration standard.

About Calibration

To ensure higher accuracy, the tester must be calibrated on a regular basis.

Calibration can be manual or automatic (only for ECTestr11 & ECTestr11+); calibration

can be 1-point or multi-point. You can choose any combination of the above two

options for calibration. If you calibrate the tester for 1-point, the calibration is applied

for all the measuring ranges. In applications where you need higher accuracy, and

when you intend to measure values in more than one range, it is recommended to

select multi-point calibration.

Selection of Automatic or Manual Calibration

ECTestr11 & ECTestr11+ models support both automatic & manual calibration while

all other models have to be calibrated manually. In automatic calibration, the tester

automatically detects and verifies known conductivity standard solutions (84uS,

1413uS & 12.88mS) . In manual calibration, you can use non-standard solutions

which may be specific for your application.

The factory default is Automatic calibration (Auto). You can enable or disable

automatic calibration as described below (for only ECTestr11 & ECTestr11+ models).

Selection of 1-point or Multi-point Calibration

The factory default is 1-point Calibration. For higher accuracy, it is recommended that

you calibrate the tester for multiple ranges if you intend to measure values in multiple

ranges. You can enable or disable multi-point calibration as described below.

Note:

Note: If you have selected a specific measuring range for the tester, selecting multi-

point calibration has no meaning, as the tester can only be calibrated for 1-point

for the selected range. Set the tester to ‘AUTO’ measuring range if you wish to

calibrate multi-points.

-4-

-5-

-6-

ON/OFF

Press & hold INC

key and switch on

the tester

YES

ENT

HOLD

Power-up

Sequence

A.CAL

ENT

HOLD

YES

ENT

HOLD

ENT

HOLD

After

1 sec.

Tester

Off

ENT

HOLD

Measurement

Mode

CAL

ATC

0.0

1413

CAL

ATC

0.0

12.88

CAL

CAL

ATC

The two calibration stds. values

displayed sequentially until

tester finds a matching solution

within 50% tolerance.

CAL

ATC

1410

1413

Tester dipped in

1413 uS std. solution

and automatically detects

the calibration std.

CAL

ATC

1410

Confirmation of 1st point

displayed for

2 seconds

ENT

HOLD

CAL

ATC

1410

12.88

CAL

ATC

12.80

12.88

CAL

ATC

12.80

The next calibration std.

displayed until tester finds

a close match within

50% tolerance

Confirmation of 2nd point

displayed for

2 seconds

Tester dipped in

12.88 mS std. solution

& automatically detects

the calibration std.

Measurement

Mode

Displayed for

2 seconds and

tester goes to

calibration mode

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This manual is related to the following products:

TDS Testr, EC Testr

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