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Chart -1 Keypad operations and descriptions 

Keypad 

Operations 

Descriptions 

 

Short press

"

#

  In the power-off mode, press this key to turn on the meter 

Long press 

#

  In the measurement mode, press and hold this key for 2 seconds to 

turn off the meter. 

 

Short/long press 

Select measurement parameters:

 

 

#

  PH850 pH meter:           

       

#

  In the measurement mode: long press to enter manual temperature 

compensation mode, then long press or momentary press this key 
to change the temperature value (only one direction).

"

#

  In the parameter setup mode, press this key to change the serial 

number of the main menu and the submenu (only one direction) 

#

  In  the  submenu  mode,  press  this  key  to  change  parameters  and 

setup (only one direction) 

 

Short press

"

#

  In the measurement mode, press this key to enter the calibration 

mode 

#

  In the calibration mode or the parameter setup and auto lock-up             

      (HOLD) mode, press this key to return to the measurement mode 

 

Short press 

#

  In the measurement mode, press this key to enter the parameter 

setup main menu

"

#

  In the calibration mode, press this key to make calibration 

#

  In the parameter setup mode, press this key to select programs

"

 

3.3  Meter Socket 

Chart-2 Sockets for Meters 

 

 

3.4  Reading Stability Display Mode 

When the measuring value is stable, smiley icon        stays on LCD, 

see Diagram – 4. If the smiley icon        does not appear or flash, please do   

not get the reading value or make calibration until the measuring value is 

stable. Per parameter P1.3, there are 3 criteria for stability standard:   

   

(Normal),   

 

(High), and 

       

(Low). The factory default is set “Normal”.   

Models 

Photos 

Description 

PH850 pH meter 

"

BNC socket (right) — connect   

  pH electrode or ORP electrode, 

RCA socket (middle) — connect       

    temperature probe 

Diagram- 4 

 

Summary of Contents for PH850

Page 1: ...Version2 0 PH850 Portable pH Meter User Manual...

Page 2: ...3 6 Automatic Power off 5 3 7 Manual Temperature Compensation MTC 5 4 pH Measurement 5 4 1 pH Electrode Information 5 4 2 pH Calibration Consideration 5 4 3 pH Meter Calibration with an example of 3 p...

Page 3: ...ssor based portable meter features automatic calibration automatic temperature compensation function setup self diagnostics automatic power off and low voltage display The meter s digital filter impro...

Page 4: ...manual or automatic mV Range 1 000 mV Resolution 1 mV Accuracy 0 2 F S 1 digit Temperature Range 0 100 C Resolution 0 1 C Accuracy 0 5 C 1 digit 2 2 Other Specifications Power AAA batteries 3 1 5V 3 I...

Page 5: ...al temperature compensation 10 Calibration guide icon 11 Stability icon of readings 12 Low battery icon when this icon appears please replace the battery 13 Automatic reading hold icon 3 2 Keypad Func...

Page 6: ...this key to enter the calibration mode In the calibration mode or the parameter setup and auto lock up HOLD mode press this key to return to the measurement mode Short press In the measurement mode pr...

Page 7: ...C 4 pH Measurement 4 1 pH Electrode Information The meter connects to 201T F plastic three in one combination pH electrode with built in temperature sensor with automatic temperature compensation func...

Page 8: ...ation Accuracy 0 1pH Two point calibration Range 7 00pH 0 Range 7 00pH Three point calibration 0 Large Range 4 2 3 Calibration frequency Calibration frequency depends on the sample the electrode perfo...

Page 9: ...on LCD press key to calibrate the meter LCD will display electrode slope of acidity range then 2nd point calibration is finished the meter enters measurement mode of two point calibration Calibration...

Page 10: ...r connects the electrode well 3 Check whether the electrode is damaged Pressing key too soon Press key after icon appears and stays During calibration the measuring value is not stable for 3min 1 Chec...

Page 11: ...d in distilled or deionized water protein solution or acid fluoride solution In addition do not soak the electrode in organic silicon lipids For best accuracy always keep the meter clean and dry espec...

Page 12: ...on stir the solution briefly and allow it to stay in the solution until icon stays and then record the reading which is ORP value ORP is in short for Oxidation Reduction Potential The unit is mV 5 2 N...

Page 13: ...r submenu P1 1 of pH parameter setting then press key to switch among submenu P1 1 P1 2 P1 3 P1 4 see Diagram 9 7 2 3 In P3 0 mode press key to enter submenu P3 1 of basic parameter setting then press...

Page 14: ...ia Normal High Low 1 Press key nor flashes Press key to select nor HI Lo press to confirm Nor Normal Hi High Lo Low 2 After confirming parameter press key to enter P1 4 mode or press key to return to...

Page 15: ...Automatic lock up setup Off On 1 Press key OFF flashes press key to select OFF On press to confirm Off not set On set the reading is automatically locked when stabilizes 10 seconds 2 When Parameter i...

Page 16: ...21 High Temperature solution LabSen 861 Low temperature solution LabSen 881 Meat LabSen 763 Micro volume solution LabSen 241 6 LabSen 241 3 Purified Water Low ion concentration samples LabSen 803 LabS...

Page 17: ...sibility of APERA INSTRUMENTS LLC for a period of THREE YEARS for the instrument and SIX MONTHS for the probe from the delivery This limited warranty does NOT cover any issues due to Accidental damage...

Page 18: ...iteria Normal High Low Normal P1 4 Restore to factory default setting No Yes No P2 0 Cond P2 1 Select electrode constant 1 0 10 0 0 1 1 0 P2 2 Select reference temperature 15 30 1 P2 3 Adjust temperat...

Page 19: ...t up reading stability criteria P1 4 Factory default setting Factory default setting P2 0 Conductivity P2 1 Cell Constant Cell P2 2 Reference temperature Reference temperature P2 3 Temperature compens...

Page 20: ...18...

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