JENCO 9031M Manual de usuario

Operation Manual

MODEL 9031M

Basis Portable

DO/Temperature Meter

9031M

CONTENTS

GENERAL INTRODUCTION………………....................2

INITIAL INSPECTION……...………………....................2

INSTALLING THE BATTERIES…………....................3

CONNECTOR..............................…………....................3

DISPLAY & KEYS FUNCTIONS…..……………...…………4

A. Display ................................................................4

B. Keys.....................................................................5

THE LSDO PROBE………….……….............................6

A. Probe ................................................................6

B. Preparing the Probe..............................................6

OPERATIONAL PROCEDURES..…….........................8

A. Entering Sensor Cap Coefficients into the 9031M.....8

B. Dissolved Oxygen Calibration.................................9

C. Dissolved Oxygen Measurements..........................10

D. Sampling Modes-continuous or manual.................11

E. Save, Recall and Delete Data.................................11

SENSOR MAINTENANCE……………………………...12

A. Cleaning the Sensor Cap......................................12

B. Sensor Cap Replacement......................................13

C. Sensor Storage....................................................14

ERROR DISPLAYS AND TROUBLESHOOTING.......15

SPECIFICATIONS………………..……........................17

WARRANTY…………………………….........................18

GENERAL INTRODUCTION

Thank you for selecting the 9031M meter. The 9031M is a precision

tool that measure dissolved oxygen in % and mg/L and temperature.

A built-in microprocessor stores, calculates and compensates for all

parameters related to DO determinations including DO electrode

temperature characteristics.

This unit has a waterproof IP67 case. The touch mode keys are

highly reliable with tactile and audio feedback. The 9031M up to 2

point calibration. This meter can operate with one 9 V battery.

Re-calibration is not required when power is turned on again.

The front of the meter has a large LCD that displays DO% saturation

or mg/L, and temperature simultaneously along with user prompts

and mode indicators. The unit prompts the user through calibration

and measurement procedures.

The 9031M measures dissolved oxygen in water using optical,

lifetime luminescence technology and uses a digital signal to send

information between the instrument and probe. Key advantages of

the 9031M include the elimination of sensor flow dependence

(stirring) and sensor warm-up time, greater stability, less frequent

calibrations, and the elimination of frequent membrane/electrolyte

changes.

The unit is also equipped with a non-volatile memory allowing the

user to store 50 different sets of readings. This unit will assign a site

number for each set of reading, so the user can review the data

easily.

Other features include long battery life and 50/60 Hz AC noise

rejection. This meter is user-friendly for field, industrial and

laboratory applications.

INITIAL INSPECTION

Carefully unpack the unit and accessories. Inspect for damages

made in shipment. If any damage is found, notify your Jenco

representative immediately. All packing materials should be saved

until satisfactory operation is confirmed.

INSTALLING THE BATTERIES

The 9031M meter is packaged with one 9 V battery required for

operation. To insert the batteries into the meter, follow the

procedure outlined below.

Figure 1: Battery compartment

1. Use a screw driver to remove the four screws and battery

cover to expose the battery compartment. (Figure 1.)

2. Replace the 9 V battery.

3. Replace the battery cover and make sure to secure the four

screws for the water-tight feature.

CONNECTOR

Figure 2: 9031M Connector

1. DO connector (6 PIN Waterproof connector)

DISPLAY & KEYS FUNCTIONS

A. Display

Figure 3: Active LCD screen

1. -

Low battery indicator.

2. MAIN DISPLAY-

Main display for dissolved

oxygen values.

3. mBar-

Display pressure units in

calibration mode.

4. Data storage site number.

5. CAL-

Calibration mode indicator.

6. K1, K2, K3, K4, K5, KC:

Sensor cap coefficient

indicators when entering

new sensor cap coefficient.

7. Temperature unit. 8. Temperature values

9. mg/L,%-

dissolved oxygen unit.

10. Full, Recall, Each, All,

Delete: Instrument’s data

storage indicators.

11.SAL ppt-

Display salinity units in

calibration mode.

12. CAP-

Sensor cap parameter

setting mode

13.Continuous or Manual-

Continuous or Manual

sampling mode indicator.

14. SAVE-

To save a reading into the

data storage.

B. Keys

Mea.

Eff.

Stand

Slope

Mode

Clear

ON/OFF-

Powers on and shuts off the meter.

Mode-

Selects display mode. In normal operation, press this

key to sequentially display Dissolved Oxygen in % air

saturation, Dissolved Oxygen in mg/L, Recall and

Delete interface.

In calibration mode, press this key to exit the current

calibration parameter and enter into the next one.

In “Recall” and “Delete” modes, press this key to exit

“Recall” and “Delete” modes respectively.

Up & Down-

To adjust inputs for salinity correction, calibration and

sensor cap coefficients.

Increases or decreases the display value as desired.

In “Recall” mode, view saved data and data storage

site number by pressing these keys.

In “Delete” mode, press these keys to select between

the “Delete Each” and “Delete All” mode.

In “Delete Each” mode, view to be deleted data and

data site numbers by pressing these keys.

CAL-

In “Measurement” mode, press this key to enter into

“Calibration” mode.

Enter-

In “Calibration” mode, press this key to save the

current parameter to memory.

In “Measurement” mode, press this key to save

reading into the next available data storage site.

At the Recall interface, press this key to display the

last set of saved data.

At the Delete interface, press this key to go into

“Delete” mode.

In the “Delete All” mode, press this key to delete all

saved data.

In the “Delete Each” mode, press this key to delete a

single set of data.

In the “Cap coefficients” mode, press this key to

confirm coefficient entries.

CAP-

Press to enter new sensor cap coefficients.

Mea.

Eff.

Stand

Slope

Mode

Clear

Mea.

Eff.

Stand

Slope

Mode

Clear

Sample/MODE-

Press and hold for 3 seconds to switch between

continuous and manual measurement modes.

Press and release to restart the measurement when

in manual mode. Continuous mode: the instrument

will continuously update the dissolved oxygen

measurement. Manual mode: the instrument will

update the DO reading until reaching a stable

measurement. The stable measurement will be

‘locked’ on the display until the user initiates a new

measurement reading by pressing the

“Sample/MODE” key.

THE LSDO PROBE

A. Probe

Throughout the manual, the term “probe” refers to the end of the

cable where the sensor is located, the term “sensor” refers to the

Light Sensing Dissolved Oxygen sensing portion of the cable/probe

assembly, and the term “sensor cap” refers to the removable

sensing cap that is replaced about once per year (Figure 4).

Figure 4: Probe

B. Preparing the Probe

Each 9031M sensor cap has unique calibration coefficients

associated with it. These coefficients are labeled on the instruction

sheet included with each 9031M cable/probe assembly and

replacement 9031M sensor cap.

Remove the probe/cable assembly from the shipping container and

locate the sensor cap instruction sheet. Be sure to save the

instruction sheet in case you need to reload these calibration

coefficients. New probe/cable assemblies have the sensor cap

installed and coefficients loaded into the probe at the factory. When

a cable is installed, the coefficients are automatically sent to the

instrument.

Preparing the probe for the first time:

1. Remove the probe guard from the probe by turning it

counterclockwise.

2. Remove the red storage cap which contains a moist

sponge from the end of the probe by pulling it straight off

the sensor. Save this to use later for long term storage.

3. Reinstall the probe guard by sliding it carefully over the

sensor and then threading it onto the cable/probe assembly

with a clockwise rotation (Figure 5).

4. Locate the gray calibration/storage sleeve that was

shipped with your probe/cable assembly. Moisten the

sponge in the gray calibration/storage with a small amount

of clean water.

5. Slide the calibration/storage sleeve over the probe guard to

keep the probe in a moist environment for storage and

calibration (Figure 6). It is important to always keep your

sensor in a moist environment so the sensor cap does not

dry out.

6. Connect the cable to the instrument by aligning the

connectors, pushing them together and then screwing

down the retainer clockwise.

Figure 5 Figure 6

OPERATIONAL PROCEDURES

A. Entering Sensor Cap Coefficients into the 9031M

Connect the probe/cable assembly to the instrument and turn the

instrument on. Locate the Calibration Code Label at the top of the

instruction sheet and note the six numbers which are listed as K1

through K5 and KC. These six numbers contain the calibration code

for this particular sensor cap. Follow these instructions to enter the

new calibration coefficients into your instrument:

1. Press and hold the “CAP” key for 3 seconds.

2. The instrument will prompt for K1 and show 8 alpha/numeric

values with the first value blinking.

3. Use the “Up” and “Down” keys to adjust the first value to

match the first value of the new cap’s K1. Press the “Enter”

key to accept.

4. Continue using the “Up” and “Down” keys to adjust all 8

alpha/ numeric values for K1 pressing the “ENTER” key to

confirm each entry.

5. After confirming the last value for K1, the instrument will prompt

you for K2. Follow the instructions in step 3 and 4 to enter and

confirm the value for K2. Continue with K3, K4 and K5.

6. After confirming K5, the 9031M will prompt you for KC. KC has

two values. Follow the instructions in step 3 and 4 to enter the

coefficients. After confirming KC, the instrument will return to

the measurement screen.

7. After entering the Sensor Cap Coefficients, perform a 1-point or

2-point calibration as described in the Calibration Section.

8. Press and hold the “CAP” key for 3 seconds at any time to exit

and cancel the cap coefficient update.

If errors are made in entering the Sensor Cap Coefficients, the

instrument will block the update and an error message will appear

on the display and the instrument will return to the K1 entry screen.

If you see this error message, re-enter the coefficients and check

them carefully for correct transcription from the Calibration

Coefficient Label.

The coefficient values are hexadecimal. Due to the 9031M’s display,

6 and b look very similar. Hexadecimal values on the 9031M will be

displayed as: A, b, C, d, E, F, 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.

If you continue to get an error message after several entry attempts,

contact JENCO Technical Support for assistance.

B. Dissolved Oxygen Calibration

The 9031M offers two options for calibrating dissolved oxygen:

DO% in water saturated air, and a Zero point. If performing a zero

point calibration, you must also perform a DO% calibration following

the zero calibration. For ease of use, JENCO recommends

performing a 1-point DO% water-saturated air calibration.

a. 1-point DO% water-saturated air calibration

1. Connect the LSDO probe to the unit and turn the unit on.

2. Hold the probe in the air gently with the sensor facing down

and press “Mode” key to select “Dissolved Oxygen in %”

mode.

3. Wait 3 to 5 minutes for the dissolved oxygen and temperature

reading to stabilize, press the “CAL” key to enter the

“Calibration” mode. The “CAL” icon appears on the LCD. The

main screen will display “1013 mBar” (factory default value).

The meter is now ready for atmospheric pressure calibration.

4. To change the pressure factor, use the “Up” and “Down”

keys to adjust the value between 500 and 1125 mBar. Press

“Enter” key to save the new value and the unit will

automatically go into the next calibration parameter which is

the value of 100% saturation in air. If “Mode” key is pressed

instead of the “Enter” key, any changes made will be

cancelled and the previous calibration settings will be retained.

5. In this interface, the user can view the calibration value in the

secondary display. Once the value in the main display

stabilizes, press “Enter” key to save the new value and the

unit will automatically go into the salinity compensation

parameter. If “Mode” key is pressed instead of the “Enter” key,

any changes made will be cancelled and the previous

calibration settings will be retained.

6. The salinity default factor value is 0.0 ppt. To change the

salinity compensation factor, use the “Up” and “Down” keys

to adjust the value between 0.0 and 40.0 ppt. Press “Enter”

key to save the new value and the unit will automatically

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