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Accumet AP84, Operating Instructions Manual, Page: 6 / 68

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5

2. Display and Keypad Functions

Display

The LCD has a primary and secondary display. 

• The primary display shows the measured pH or dissolved oxygen reading. 
• The secondary display shows the temperature of the reading. 

The display also shows error messages, keypad functions and program functions.

2.1

Primary display

5. 

6.

Secondary display

3. 

2.

15. 

16. 

14. 

12.  11.

8. 

1. 

13.

4.

10.

7. 

1. 

SETUP mode indicator

2.

MEASurement mode
indicator

3.

CALibration mode
indicator

4.

pH indicator

5.

% saturation indicator

6.

Salinity input indicator

7.

Oxygen solubility 
indicators

8.

Temperature 
indicators

9.

Automatic Temperature

Compensation 
indicator

10.

ERRor indicator

11.

Low battery indicator

12.

Probe indicator

13. 

Calibration data 
indicator

14.

Function ON/OFF
indicator

15.

HOLD indicator

16.

READY indicator

9.

Summary of Contents for AP84

Page 1: ......

Page 2: ...OPERATING INSTRUCTIONS accumet 13636AP84A Portable Waterproof pH Dissolved Oxygen Meter Printed 1 02 IP 67...

Page 3: ...20 24 5 1 Taking DO readings 20 21 5 2 Taking pressure salinity compensated DO measurements 21 22 5 3 Taking pH readings 23 24 5 4 Manual temperature compensation 25 6 Hold function 26 7 Backlit LCD...

Page 4: ...gram P1 0 Dissolved oxygen parameters 47 48 P1 1 Pressure adjustment mode 47 P1 2 Salinity adjustment mode 48 8 14 mg l ppm mode Program P2 0 Previous calibration information 49 8 15 mg l ppm mode Pro...

Page 5: ...r based instrument that measures pH 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 membran...

Page 6: ...ns 2 1 Primary display 5 6 Secondary display 3 2 15 16 14 12 11 8 1 13 4 10 7 1 SETUP mode indicator 2 MEASurement mode indicator 3 CALibration mode indicator 4 pH indicator 5 saturation indicator 6 S...

Page 7: ...ibration and Measurement mode If you were in pH mode press CAL MEAS to enter pH calibration mode If you were in DO saturation mode press CAL MEAS to enter DO saturation calibration mode If you were in...

Page 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...

Page 9: ...ur solution at the same time You can use any standard pH electrode with a BNC connector with this meter If you do not have the DO probe connected you will need a separate temperature probe to provide...

Page 10: ...TION Do not pull on the probe cord or the probe wires might disconnect To connect the dissolved oxygen probe NOTE Do not substitute other DO probes 1 Line up the notch and 6 pins on the meter with the...

Page 11: ...7 00 the meter retains the old calibration data at pH 4 01 and pH 10 01 saturation and mg l ppm All new calibrations automatically override existing calibration data To view current calibration points...

Page 12: ...the electrode has been stored dry wet the probe in tap water for 10 minutes before calibrating or taking readings to saturate the pH electrode surface and minimize drift Wash your probe in deionized w...

Page 13: ...red reading while the smaller secondary display will indicate the pH standard buffer solution See figure 5 Wait for the measured pH value to stabilize See figure pH CAL pH READY C C B pH CAL pH B pH A...

Page 14: ...r additional calibration points 9 When calibration is complete press CAL MEAS to return to pH measurement mode Notes To exit from pH Calibration mode without confirming calibration DO NOT press ENTER...

Page 15: ...matically override existing DO calibration data Before Dissolved Oxygen calibration Before starting DO calibration make sure you are in the correct measurement mode When you switch on the meter the me...

Page 16: ...e probe in a damp cloth Do not touch the membrane 2 Press the MODE key to select the saturation mode See figure 3 Press the CAL key The CAL indicator will appear above the primary display The primary...

Page 17: ...nt 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 is stable s...

Page 18: ...o not touch the membrane 3 Dip the probe into a sample of known oxygen concentration Wait for the reading to stabilize If the Ready indicator feature is enabled it will appear when the reading is stab...

Page 19: ...ammed into the meter It also adjusts to the salinity value that is programmed into the meter You can change the barometric pressure value and salinity value in the mg l ppm SETUP mode see pages 47 48...

Page 20: ...the MODE key to enter temperature calibration mode The primary display shows the last set temperature reading and the secondary display shows you the factory default temperature value See figure 4 Co...

Page 21: ...stirrer to accomplish this To take measurements 1 Rinse the probe well with deionized rinse water or rinse solution 2 Select the appropriate measurement mode Press the MODE key to toggle between modes...

Page 22: ...an adjust the pressure and salinity values of your measurements in the SETUP mode The DO meter will automatically compensate for salinity and pressure based on the values entered in the setup function...

Page 23: ...o enter Set Up mode 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 solution in ppt The upper d...

Page 24: ...he sample When dipping the pH electrode into the sample the sensor or the glass bulb of the electrode must be completely immersed into the sample Stir the probe gently in the sam ple to create a homog...

Page 25: ...gram P3 1 see page 35 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...

Page 26: ...mperature setting and the secondary display shows the default value 25 C See figure 4 Check the temperature of your sample using an accurate thermometer 5 Press the or keys to offset the temperature t...

Page 27: ...his 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 NOTE This meter has an auto endpoint feature When thi...

Page 28: ...s conserve batteries This adjustment is only available in the saturation or mg l ppm SETUP modes From measurement mode 1 Press the MODE key to switch to saturation or mg l ppm mode 2 Press SETUP key t...

Page 29: ...h mode the meter is in CAL Calibration data ELE Probe data COF Configuration rSt Reset meter to factory default dPr Dissolved oxygen parameters saturation offset adjustment CAL Calibration data ELE Pr...

Page 30: ...electrode slope COF Unit configuration Ready indicator on or off auto endpoint on or off number of calibration points 2 3 4 or 5 Select F or C 8 1 rSt Reset to factory default Reset to factory default...

Page 31: ...ew probe slope View saturation offset View mV value equivalent to 100 saturation View mV value equivalent to 0 saturation COF Unit configuration Ready indicator on or off auto endpoint on or off Selec...

Page 32: ...View probe slope View mV value equivalent to 100 saturation View mV value equivalent to 0 saturation COF Unit configuration Ready indicator on or off auto endpoint on or off Select mg l or ppm units S...

Page 33: ...7 00 P1 4 pH 10 01 P1 5 pH 12 45 See figure 5 When you have scrolled through all calibration data you will automatically return to the subgroup menu Press the CAL MEAS key to return to measure ment m...

Page 34: ...ct parameter P2 1 5 The display shows the electrode offset value the display shows the mV offset at pH 7 00 If you have not calibrated at any buffer the primary display shows 0 00 mV See figure 6 Pres...

Page 35: ...y to enter SETUP mode 2 Press the and keys to scroll through subgroups until you view parameter P2 0 See figure 3 Press the ENTER key twice to select parameter P2 2 4 The display shows electrode slope...

Page 36: ...Y indicator and auto endpoint function This program lets you select READY indicator on to indicate when the reading is stable READY indicator off for faster meter response Auto endpoint function on Se...

Page 37: ...ress the and keys to select 2 3 4 or 5 point pH calibration 6 Press the ENTER key to confirm selection and to return to the subgroup menu Press the CAL MEAS key to return to measurement mode C C D D P...

Page 38: ...e 4 Press the ENTER key three times to select parameter P3 3 See figure 5 Press the and keys to toggle between C and F 6 Press the ENTER key to confirm selec tion and to return to the subgroup menu Pr...

Page 39: ...contrast setting 8 5 Notes To reset all saturation data see page 46 To reset all mg l ppm data see page 55 See page 65 for a table of factory default settings A B From measurement mode 1 Press the MOD...

Page 40: ...nter SETUP mode 3 Press the and keys to scroll through subgroups until you view parameter P1 0 in the lower display See figure 4 Press the ENTER key twice The upper display shows either Hg or PA and t...

Page 41: ...the SETUP key to enter SETUP mode 3 Press the and keys to scroll through subgroups until you view parameter P2 0 in the lower display See figure 4 Press the ENTER key The upper display shows the curr...

Page 42: ...s the MODE key to select saturation mode 2 Press the SETUP key to enter SETUP mode 3 Press the and keys to scroll through subgroups until you view parameter P3 0 in the lower display See figure 4 Pres...

Page 43: ...ss the ENTER key The upper display shows the 0 saturation mV value See figure 8 Press the ENTER key to move back to subgroup P4 0 If you want to return to measurement mode press CAL MEAS saturation mo...

Page 44: ...u can also change the Ready indicator and auto endpoint function in SETUP Program P3 1 on page 35 in pH mode or P4 1 on page 51 in mg l ppm mode Any changes you make to the Ready indicator auto endpoi...

Page 45: ...n the lower display See figure 4 Press the ENTER key until C or F appears in the upper display See figure 5 Press the and keys to toggle between C and F 6 Press the ENTER key to confirm selection and...

Page 46: ...P key to enter SETUP mode 3 Press the and keys to scroll through subgroups until you view parameter P6 0 in the lower display See figure 4 Press the ENTER key A number 0 8 appears in the upper display...

Page 47: ...ibration data and set parameters A B 8 12 From measurement mode 1 Press the MODE key to select the saturation measurement mode 2 Press SETUP key to enter SETUP mode 3 Press the and keys to scroll thro...

Page 48: ...ys to scroll through subgroups until you view parameter P1 0 in the lower display See figure 4 Press the ENTER key twice The upper display shows either Hg or PA and the lower display shows bAr 5 Press...

Page 49: ...nd keys to scroll through subgroups until you view parameter P1 0 in the lower display See figure 4 Press the ENTER key five times The upper display shows the salinity value and the lower shows SAL Se...

Page 50: ...the MODE key to select mg l ppm mode 2 Press the SETUP key to enter SETUP mode 3 Press the and keys to scroll through subgroups until you view parameter P2 0 in the lower display See figure 4 Press th...

Page 51: ...ENTER key The upper display shows the 0 saturation mV value See figure 8 Press the ENTER key to move back to subgroup P3 0 If you want to return to measurement mode press CAL MEAS mg l ppm mode P3 0...

Page 52: ...l ppm measurement mode 2 Press SETUP key to enter SETUP mode 3 Press the and keys to scroll through subgroups until you view parameter P4 0 in the lower display See figure 4 Press the ENTER key to sel...

Page 53: ...y See figure 4 Press the ENTER key until dO appears in the upper display P4 2 in the lower display See figure 5 Press the and keys to toggle between mg l or ppm units 6 Press the ENTER key to confirm...

Page 54: ...er display See figure 4 Press the ENTER key until C or F appears in the upper display See figure 5 Press the and keys to toggle between C and F 6 Press the ENTER key to confirm selection and to return...

Page 55: ...nter SETUP mode 3 Press the and keys to scroll through subgroups until you view parameter P5 0 in the lower display See figure 4 Press the ENTER key A number 0 8 appears in the upper display and LCd a...

Page 56: ...pH calibration data and set parameters A B 8 18 From measurement mode 1 Press the MODE key to select mg l ppm mode 2 Press SETUP key to enter SETUP mode 3 Press the and keys to scroll through subgrou...

Page 57: ...ext use rinse the liquid junction with de ionized water and tap dry never wipe electrode NOTE If this does not restore electrode to normal response see Reactivating the pH electrode section on page 57...

Page 58: ...ne must be cleaned at regular intervals to assure maximum reliability After using the probe rinse the probe in clean water and wipe it with a soft cloth or paper to avoid any hardening of deposits If...

Page 59: ...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 met...

Page 60: ...mference 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 for wri...

Page 61: ...bubbles c Dirty DO probe or c Clean the probe or electrode pH electrode and recalibrate d Probe not deep d Make sure sample entirely enough in sample covers the probe sensors e External noise pickup e...

Page 62: ...ibration sections or Probe Maintenance section Battery Low battery level Need new batteries Clean battery contacts indicator blinks or battery Replace batteries with fresh connection is bad ones notin...

Page 63: ...in manually and automatic correction Barometric pressure correction Range 500 to 1499 mm Hg 66 6 to 199 9 kPa Resolution 1 mm Hg 0 1 kPa Method Key in manually and automatic correction DO Probe type...

Page 64: ...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...

Page 65: ...ctory 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 ne...

Page 66: ...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 saturation offset up...

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