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Accumet AP74, Руководство по эксплуатации

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40

Temperature

sensor

Anode

Membrane

lock

Membrane

O-ring

Membrane 

cap

Probe 
guard

Cathode

Membrane replacement

Replacement of the membrane is required only
when you cannot calibrate the probe, or if the
membrane is damaged.

Typical membrane damages are punctures 
or wrinkles caused during measurements or
cleaning.

To replace the probe membrane:

1.

Pull off the probe guard.

2.

Unscrew the membrane cap from the probe.

3.

Hold the probe under a water tap and brush
away the white oxide on the cylindrical anode
with a stiff plastic brush—do not use metal
cleaning material.

4. 

It the cathode has any deposits, remove them
with a light scouring powder. Do not polish 
the cathode. 

NOTE: 

If you have purchased a replacement 
membrane module with preinstalled
membrane, skip to step 12.

CONTINUED ON NEXT PAGE

9.2

A

Содержание AP74

Страница 1: ......

Страница 2: ...OPERATING INSTRUCTIONS accumet 13636AP74A Portable Waterproof Dissolved Oxygen Meter Printed 1 02 IP 67...

Страница 3: ...surement 15 18 5 1 Taking DO readings 15 16 5 2 Taking pressure salinity compensated DO measurements 17 18 6 Hold function 19 7 Memory functions 20 21 7 1 Memory input 20 7 2 Memory recall 21 8 Advanc...

Страница 4: ...g C or F temperature readout 34 8 7 Program LCd Adjusting LCD brightness 35 8 8 Program CLO Setting the real time clock 36 37 8 9 Program rST Resetting to factory default settings 38 9 Probe care and...

Страница 5: ...at measures dissolved oxygen and temperature It s completely waterproof and it floats Your meter has many user friendly features all of which are accessible through the membrane keypad Your meter incl...

Страница 6: ...y display 3 2 17 18 16 10 14 13 12 8 1 15 4 11 7 1 SETup mode indicator 2 MEASurement mode indicator 3 CALibration indicator 4 MEMory recall mode indicator 5 saturation indicator 6 Salinity input indi...

Страница 7: ...e If you were in DO saturation mode press CAL MEAS to enter DO saturation calibration mode If you were in DO mg l ppm mode press CAL MEAS to enter DO mg l ppm calibration mode NOTE Temperature calibra...

Страница 8: ...are included with your meter 1 Use a Phillips screwdriver to remove the two screws holding the battery cover See figure below 2 Lift off battery cover to expose batteries 3 Insert batteries Follow the...

Страница 9: ...t touch connector with soiled hands To connect the probe 1 Line up the notch and 6 pins on the top of the meter with the holes in the probe connector Push down and turn the locking ring to lock into p...

Страница 10: ...w calibrations automatically override existing calibration data Before calibration Before starting calibration make sure you are in the correct measurement mode When you switch on the meter the meter...

Страница 11: ...e See figure 10 4 2 A A B C B C Dissolved Oxygen calibration in percent saturation You can calibrate this meter quickly and easily in air The exact calibration value depends on barometric pressure The...

Страница 12: ...the current value of the measurement and the secondary display will show 0 0 See figure 4 Wait for the reading to stabilize If the Ready indicator feature is enabled it will appear when the reading i...

Страница 13: ...e See figure 5 Press the CAL key The CAL indicator will appear above the primary display The primary display shows the current value of the measurement and the sec ondary display shows the temperature...

Страница 14: ...mmed into the meter It also adjusts to the salinity value that is pro grammed into the meter You can change the barometric pressure value and salinity value in the mg l ppm Set Up mode see pages 27 28...

Страница 15: ...e primary display shows the last set temperature reading and the secondary display shows you the factory default temperature value See figure 4 Compare the primary display reading to a NIST traceable...

Страница 16: ...se solution 2 Select the appropriate measurement mode Press the MODE key to toggle between modes saturation mg l ppm date time clock 3 Dip the probe into the sample Stir the probe gently to homogenize...

Страница 17: ...p program see page 32 for directions Taking measurements with the auto endpoint feature selected on When a reading is stable for more than 5 seconds the auto endpoint feature will automatically hold t...

Страница 18: ...Appendix 2 on page 46 for a Pressure vs Altitude table Pressure adjustment 1 Press the SETUP key to enter Set Up mode 2 Press the key once The upper display shows dPr See figure 3 Press the ENTER key...

Страница 19: ...ss the key until the upper display shows dPr See figure 4 Press the ENTER key until the upper display shows a number and the lower display shows SAL 5 Use the and keys to enter the salinity of your so...

Страница 20: ...ts NOTE This meter shuts off automatically after 20 minutes of nonuse If the meter is shut off either automatically or manually the HOLD value will be lost For longer storage use the memory functions...

Страница 21: ...ore up to 50 sets of data in any combination of mg l or ppm readings 7 1 A To store a reading 1 During any measurement function MEAS press the MI key to input any data into the memory 2 MEM Sto and me...

Страница 22: ...to the next memory location screen See figure 5 If necessary press the key to select the next memory location screen press the key to select the previous memory location screen 6 Repeat steps 2 5 to r...

Страница 23: ...22...

Страница 24: ...parameters 3 OFS saturation offset adjustment saturation mode only 4 CAL Calibration data 5 ELE Probe data 6 COF Configuration 7 LCd Backlit display 8 CLO Setting clock 9 rSt Reset meter to factory d...

Страница 25: ...quivalent to 0 saturation Instructions on page 26 8 1 COF Unit configuration Ready indicator on or off auto endpoint on or off Select mg l or ppm units Select F or C LCd Backlit display Adjust brightn...

Страница 26: ...mV value equivalent to 100 saturation View mV value equivalent to 0 saturation Instructions on page 26 COF Unit configuration Ready indicator on or off auto endpoint on or off Select F or C LCd Backl...

Страница 27: ...om measurement mode 1 Press the Set up key to enter Set Up mode 2 Press the and keys to scroll through subgroups until you view parameter Clr in the upper display See figure 3 Press the ENTER key to e...

Страница 28: ...til you view parameter dPr in the upper display See figure 3 Press the ENTER key twice The upper display shows either Hg or PA and the lower display shows bAr 4 Press the and keys to toggle between mm...

Страница 29: ...er Set Up mode 3 Press the and keys to scroll through subgroups until you view parameter dPr in the upper display See figure 4 Press the ENTER key five times The upper display shows the salinity value...

Страница 30: ...o select saturation mode 2 Press the Set up key to enter Set Up mode 3 Press the and keys to scroll through subgroups until you view parameter OFS in the upper display See figure 4 Press the ENTER key...

Страница 31: ...a you want to view or mg l ppm 2 Press the Set up key to enter Set Up mode 3 Press the and keys to scroll through subgroups until you view parameter CAL in the upper display See figure 4 Press the ENT...

Страница 32: ...y shows the 100 saturation mV value See figure 7 Press the ENTER key The upper display shows the 0 saturation mV value See figure 8 Press the ENTER key to move back to subgroup ELE If you want to retu...

Страница 33: ...to measurement mode Notes Meter default is set for Ready indicator on and auto endpoint function off 32 COF Unit configuration Unit configuration mode lets you select the following parameters A Ready...

Страница 34: ...ode 2 Press Setup key to enter Set Up mode 3 Press the and keys to scroll through subgroups until you view parameter COF in the upper display See figure 4 Press the ENTER key until dO appears in the u...

Страница 35: ...e 2 Press the and keys to scroll through subgroups until you view parameter COF in the upper display See figure 3 Press the ENTER key until C or F appears in the upper display See figure 4 Press the a...

Страница 36: ...nd keys to scroll through subgroups until you view parameter LCd in the upper display See figure 3 Press the ENTER key A number 0 8 appears in the upper display and LCd appears in the lower display Se...

Страница 37: ...The century digits will flash See figure 4 Press the and keys to toggle to the correct century 5 Press the ENTER key to confirm the century and move to year selection The year digits will flash See fi...

Страница 38: ...minute digits will flash See figure 14 Press the and keys to toggle to the correct minutes 15 Press the ENTER key to confirm the minutes and move to second selec tion The second digits will flash See...

Страница 39: ...t calibration value the LCD contrast setting the clock setting A B 8 8 From measurement mode 1 Press Setup key to enter Set Up mode 2 Press the and keys to scroll through subgroups until you view para...

Страница 40: ...and maintenance will help you receive the maximum probe life and ensure more accurate readings Since any deposits on the membrane surface act as a barrier to oxygen diffusing through the mem brane th...

Страница 41: ...nts or cleaning To replace the probe membrane 1 Pull off the probe guard 2 Unscrew the membrane cap from the probe 3 Hold the probe under a water tap and brush away the white oxide on the cylindrical...

Страница 42: ...circumference See figure 10 Using the installation tool screw the membrane lock back into the cap Tighten the lock firmly over the membrane and O ring but do not overtighten 11 Inspect the membrane f...

Страница 43: ...Fill probe with reference readings in probe electrolyte b Dirty probe b Clean the probe and recalibrate c External noise pickup c Move or switch off or induction caused by interfering motor nearby ele...

Страница 44: ...el Need new batteries Clean battery contacts indicator blinks or battery Replace batteries with fresh connection is bad ones noting polarity Err 1 Memory write Hardware failure Turn meter on and off i...

Страница 45: ...Hg 66 6 to 199 9 kPa Resolution 1 mm Hg 0 1 kPa Method Key in manually and automatic correction Probe galvanic probe Memory stores and recalls up to 50 points with date time Real time clock stamps cal...

Страница 46: ...gen passed through the membrane and produces an electric current in the probe This current is proportional to the partial pressure of oxygen in the sample Since the cathode consumes the oxygen in the...

Страница 47: ...factory setting 760 mm Hg the saturation calibration value in air will automatically adjust to a value other than 100 see corrected saturation value column below The adjusted value is correct for the...

Страница 48: ...tion Options settings Default Clr Memory clear yes no no dPr Pressure units Hg or Pa Hg Barometric pressure adjust from 500 1499 mm Hg 760 mm Hg Salinity adjustment adjust from 0 50 ppt 0 ppt OFS Set...

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