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TECPEL PH-708 Operation Manual

Ph meter
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PH METER
Model : PH-708
OPERATION MANUAL
Your purchase of this PH
METER
marks
forward for you into the
f i e l d
o f
measurement.
this
PH
METER
complex
and
instrument,
structure will allow many
years of use if proper
operating techniques are
developed.
Please
the following instructions
carefully and always keep
this manual within easy
reach.
a
step
p r e c i s i o n
Although
is
a
delicate
its
durable
read

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Summary of Contents for TECPEL PH-708

  • Page 1 PH METER Model : PH-708 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........6 4-1 Calibrating Consideration........6 4-2 Requiring Equipment for calibration....6 4-3 Two Points Calibration........6 4-4 Signal Point Calibration........8 4-5 Others............. 9 5. PH TEMPERATURE COMPENSATION......10 5-1 Manual temperature compensation....

  • Page 3: Features

    1. FEATURES * Professional PH/mV METER. PH range : 0 to 14 PH x 0.01 PH. mV range : -1999 mV to 1999 mV. * The instrument is with mV ( millivolt ) function for mV measurement ( cooperate with optional ORP probe to be a professional ORP meter) * Wide manual temperature compensation adjustment can be easily operated by push button on the front panel.

  • Page 4: Specifications

    2. SPECIFICATIONS 2-1 General Specifications Circuit Custom one-chip of microprocessor LSI circuit. Display 51 mm x 32 mm, dual function LCD display, 15 mm ( 0.6" ) digit size. Measurement 0 to 14 PH -1999 mV to 1999 mV Input 10^12 ohm Impedance Temperature...
  • Page 5 Operating Max. 80% RH. Humidity Sampling Time Approx. 0.8 second. Power Supply 006P DC 9V battery ( Alkaline or Heavy duty type ). Power Current Approx. DC 7 mA. Weight 250 g/0.55 LB ( battery included ). Size ( meter ) 195 x 68 x 30 mm ( 7.6 x 2.6 x 1.2 inch ).

  • Page 6: Front Panel Description

    3. FRONT PANEL DESCRIPTION Fig. 1...
  • Page 7 Fig. 2 Fig. 3 3-1 Display 3-2 Power Button 3-3 REC. Button 3-4 Hold Button Button/Up Button ℃ ℉ 3-6 PH/mV Button/Left Button 3-7 TEMP. C Button 3-8 CAL Button/Down Button 3-9 Battery Compartment/Cover 3-10 PH BNC Input Socket 3-11 ATC Probe Input Socket 3-12 RS-232 Out Terminal 3-13 Stand 3-14 PH 7 VR...

  • Page 8: Ph Calibrating Procedure

    4. PH CALIBRATION PROCEDURE 4-1 Calibration Consideration The most ideal PH ELECTRODE generates 0 mV at PH 7.00 ( 177.4 mV at PH 4 ) and PH-208 has been always calibrated with signals which simulate the most ideal PH ELECTRODE ( based on 25 ambient environment ).
  • Page 9 4) PH 7 calibration Connect the PH ELECTRODE with the " BNC socket " ( 3-10, Fig. 1 ) and immerse the electrode in the PH7 buffer solution. Press the " CAL Button " ( 3-8, Fig. 1 ) then the upper display shows texts of "...

  • Page 10: Signal Point Calibration

    4.00 The texts " CAL " will flash for around 5 seconds. After that, the meter calibrate itself automatically. The upper display will show the calibrated value, the lower display will show the temperature value. 4.00 25.0 6) Rinse the electrode with distilled water again. 7) Repeat above (4) to (5) procedures two times at least.

  • Page 11: Others

    4-5 Others Above calibration procedures effect only when reading value within 1 PH of the calibration point. However if the reading value beyond * 1 PH of PH 7 ( > PH8, < PH6 ) * 1 PH of PH 4 ( > PH5, < PH3 ) * 1 PH of PH 10 ( >...

  • Page 12: Ph Temperature Compensation

    5. PH TEMPERATURE COMPENSATION Enable the meter to gain high accuracy measuring results from different kinds of solution, the temperature compensation calibration procedures are necessary to be executed. Manual temperature compensation calibration procedures please refer to 5-1 ( See below). Automatic temperature compensation calibration procedures please refer to 5-2 ( Page 14 ).
  • Page 13 a. Adjust the temperature compensation value Press the " TEMP. C Button " ( 3-7, Fig. 1 ) first, The upper display will show the measured PH values. the lower display will show the manual temperature compensation value. 7.91 026.1 ℃...
  • Page 14 Use the " Up Button " ( 3-5, Fig. 1 ) and the " Down Button " ( 3-8, Fig. 1 ) to adjust the PH 4 default calibration value. The adjustment range of " PH4 default calibration value " is limited within 4.00.20 PH c.
  • Page 15 The upper display will show the values of " 10.00 " and the lower display will show the " PH 10 default calibration value ". 10.00 10.02 Use the " Up Button " ( 3-5, Fig. 1 ) and the " Down Button "...

  • Page 16: Automatic Temperature Compensation

    5-2 Automatic temperature compensation 1) Plug the " Optional ATC Temp. Probe, TP-07 " into the " ATC Probe Input Socket " ( 3-11, Fig. 1 ). 2) Power on the instrument by pressing the " Power Button " ( 3-2, Fig. 1 ). 3) Press the "...

  • Page 17: Mv Measurement

    If the operating is under the " Manual temperature compensation ", then please refer to the above 5-1 calibration procedures. If the operating is under the " Automatic temperature compensation ", then please refer to the above 5-2 calibration procedures. 5) Place the electrode into the solution, then the instrument will have the PH value on the display.
  • Page 18 6-4 Data Hold Press the " Hold Button " ( 3-4, Fig. 1 ) will hold the measured value & the LCD will indicate a " HOLD " symbol on the display during the measuring. * Press the " Hold Button " again to exit the data hold function.
  • Page 19 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.) & plug PH4 ( PH10, SLOPE) ATC probe PH measuring procedures Setting the Manual temp. compensation values on front panel Power...

  • Page 20: Auto Power Disable

    Power management AUTO POWER OFF MANUAL POWER OFF (Not available during Memory Record Function) 7. AUTO POWER OFF DISABLE The instrument has " Auto Power Off " function in order to prolong battery life. The meter will shut off automatically if none of the buttons are pressed in approx.
  • Page 21 Meter (3.5 mm jack plug) (9W 'D" Connector) Center Pin........Pin 4 Ground/shield........Pin 2 2.2 K resistor Pin 5 The 16 digits 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 indicates the following status : Start Word When send the upper display data = 1...

  • Page 22: Battery Replacement

    RS232 setting Baud rate 9600 Parity No parity Data bit no. 8 Data bits Stop bit 1 Stop bit 9. BATTERY REPLACEMENT 1) When the left corner of LCD display show " ", it is necessary to replace the battery. However, in-spec. measurement may still be made for several hours after low battery indicator appears.
  • Page 23 PH ELECTRODE General purpose, laboratory & Model : PE-03 field usage. 12.3 mm dia. x 160 mm. Epoxy body, 1 - 13 pH. PH ELECTRODE General purpose, laboratory & Model : PE-11 field usage. 10 mm dia. x 130 mm. Epoxy body, 1 - 13 pH.