MRC PH-207 Operation Manual
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MRC PH-207 Operation Manual

Ph meter
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PH METER
Model : PH-207
OPERATION MANUAL
3, Hagavish st. Israel 58817 Tel: 972 3 5595252, Fax: 972 3 5594529
Your purchase of this pH
METER
forward for you into the
f i e l d
measurement.
this
complex
instrument,
structure will allow many
years of use if proper
operating techniques are
developed.
the following instructions
carefully and always keep
this manual within easy
reach.
mrc@mrclab.com
MRC. 7.18
marks
a
o f
p r e c i s i o n
Although
pH
METER
is
and
delicate
its
durable
Please
read
step
a

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Summary of Contents for MRC PH-207

  • Page 1 PH METER Model : PH-207 Your purchase of this pH METER marks step forward for you into the f i e l d p r e c i s i o n measurement. Although this METER complex delicate instrument, durable...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS FEATURES............1 2. SPECIFICATIONS........... 2 3. FRONT PANEL DESCRIPTION........4 4. PH CALIBRATING PROCEDURE........5 4-1 Calibrating Consideration 4-2 Requiring Equipment for calibration....5 4-3 Two Points Calibration........5 4-4 Single Point Calibration........6 5. PH TEMPERATURE COMPENSATION......6 5-1 Manual temperature compensation....

  • Page 3: Features

    1. FEATURES * Microprocessor circuit assures high accuracy and provides special functions and features. * Super large LCD display with contrast adjustment for best viewing angle. * Dual function meter's display. * Heavy duty & compact housing case. * Records Maximum, Minimum and Average readings with RECALL.

  • Page 4: Specifications

    * Wide applications: water conditioning, aquariums, beverage, fish hatcheries, food processing, photography, laboratory, paper industry, plating industry, quality control, school & college, water conditioning. 2. SPECIFICATIONS 2-1 General Specifications Circuit Custom one-chip of microprocessor LSI circuit. Display Dual function meter's display, 13 mm(0.5") Super large LCD display with contrast adjustment for best viewing angle.
  • Page 5 Over input Indication of "- - - -". indication Any combination PH electrode with Electrode BNC connector/ Operating 0 蚓 to 50 蚓(32 蚌 to 122 蚌). Temperature Operating Max. 80% RH. Humidity Sampling Time Approx. 0.8 second. Power Supply 006P DC 9V battery(Heavy duty type).

  • Page 6: Front Panel Description

    3. FRONT PANEL DESCRIPTION Fig. 1 3-1 Display 3-10 Manual Temp. Button 3-2 Power Off/On button 3-11 Function Select Switch 3-3 Data Hold Button 3-12 SLOP(PH 4) Calibration 3-4 蚓/ 蚌 button 3-5 LCD Contrast Adjust 3-13 >> Button (Manual Temp. adjust) 3-6 Memory "Record"...

  • Page 7: Ph Calibrating Procedure

    4. PH CALIBRATING PROCEDURE 4-1 Calibrating Consideration The PH meter already calibrated by mV signal that simulated from the mV output of the ideal PH ELECTRODE (base on 25 environment). For an ideal electrode will produce 0 mV at PH 7.00, but most electrodes are slight off.

  • Page 8: Single Point Calibration

    5) Rinse the electrode in the distilled water. Place the electrode into the PH-04 ( or PH-10 ) buffer solution. Use the screw to adjust the " PH 4 calibration VR " (3-12, Fig.1) until the display reading reach to 4.00 0.01 ( or 10.00 0.01 for PH-10 ).

  • Page 9: Manual Temperature Compensation

    5-1 Manual temperature compensation 1) Select the " Function Switch " (3-11, Fig.1) to the " PH MANUAL. TEMP. " position. 2) Push the " MANUAL Temp. Button " (3-10, Fig.1) first, then the display will show " 25.0 蚓 " for the initial manual setting temp.

  • Page 10: Mv Measurement

    If the operating is under the " Automatic temperature compensation ", then please according the above 5-2 measuring procedures. 4) Place the electrode into the measured solution, then the instrument will display the PH value. 5) After make the measurement, please rinse the electrode in distilled water.
  • Page 11 Consideration : When use the Temp. Probe, As to keep the temp. reading be stable, should plug in the PH electrode into the meter at the same time. If only plug in the temp. probe, then the temperature reading value may exist little deviation. 6-4 Data Hold 1) During the measurement, Push the "...
  • Page 12 6-6 Following are the block diagrams for quick measuring procedures Calibration Set the Single point calibration Power manual PH 7(CAL.) temp. values Two points calibration PH 7(CAL.) & PH4(SLOPE) PH measuring procedures Setting the Manual temp. compensation values on front panel Power Automatic temperature temperature compensation...

  • Page 13: Circuit Adjusting Procedures When Changing The Temp. Probe

    Power management AUTO POWER OFF MANUAL POWER OFF (Not activated during Memory Record Selection) 7. CIRCUIT ADJUSTING PROCEDURES WHEN CHANGING THE TEMP. PROBE 1) The instrument can connect the optional Temperature Probe be used as a THERMOMETER & making the automatic temperature compensation for PH function.

  • Page 14: Measuring Consideration

    8. MEASURING CONSIDERATION 1) The meter is built the " Auto power shut off " to save battery life. If not any function button be pushed within approx. 10 minutes, then the power will be off automatically. If the user is not intend to execute the " Auto Power off "...
  • Page 15 The 16 digit data stream will be displayed in the following format : D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Each digit indicate the following status : End Word D1 to D4 Upper Display reading, D1=LSD, D4=MSD D5 to D8 Lower Display reading, D5=LSD, D8=MSD...

  • Page 16: Battery Replacement

    10. BATTERY REPLACEMENT 1) When the left corner of LCD display show " LBT ", it is necessary to replace the battery. However, in-spec. measurement may still be made for several hours after low battery indicator appears before the instrument become inaccurate.

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