Related Manuals for JENCO 6250
Summary of Contents for JENCO 6250
- Page 1 OPERATION MANUAL MODEL 6250/6219 SERIES MICRO COMPUTER BASED PH/mV/ION/TEMP METER JENCO ELECTRONICS, LTD. MANUFACTURER OF PRECISION INSTRUMENTS...
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Page 2: General Description
(model 6219) applications. The instrument is powered by six AA-size (model 6219) / AAA-size (model 6250) alkaline batteries or AC adaptor. When the batteries are in need of replacement, the LCD will display a "LO BAT" message. Initial Inspection Carefully unpack the instrument and accessories. -
Page 3: Power Source
6.86pH and 9.18pH standard buffer. Make sure the model number is that you ordered. POWER SOURCE The Jenco model 6250 operate on either six AAA size alkaline batteries or AC adaptor. The model 6219 operate on either six AA size alkaline batteries or AC adaptor. Insert batteries as described below. - Page 4 Figure 1 Battery Compartment...
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Page 8: Specifications
9V AC adaptor Display pH/mV/ion 15mm high LCD 12.7mm high LCD TEMP. 8.7mm high LCD 12.7mm high LCD Battery life 25 Hours 50 HOurs Dimensions (W/D/H) 83mm/241mm/72mm 250mm/240mm/100mm WEight (w/batteries) 450gm 1070gm Touch Keys for Model 6219 and Model 6250... - Page 9 MEASUREMENT ERROR INDICATIONS Er1 1. pH electrode offset greater than +/- 1.5 pH range 2. Buffer 7.00pH (model 6250/6219), 6.86pH (model 6250C/6219C) not correct Er2 1. pH electrode slope off by more than +/- 30 % of ideal slope 2.
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Page 10: Operational Procedures
1.1 Connect the pH electrode and the ATC/Temp to the connectors of the instrument. Refer to the Figure 2. The ATC annicator (model 6250)/ green color ATC LED lamp (model 6219) will be on. Press the MODE key to... - Page 11 1.4 Remove the pH electrode and ATC/Temp probe from buffer 7.00pH or buffer 6.86pH, rinse with distilled water and immerse in buffer 4.01pH, 10.01pH (model 6250/model 6219) or buffer 4.00pH, 9.18pH (model 6250C/ model 6219C). The instrument will display the temperature of the second buffer.
- Page 12 CLEAR key and repeat from 2.2. Only buffer 4.01 and 10.01 (model 6250/ model 6219 only) or Buffer 4.00 and 9.18 (model 6250C/ model 6219C only) may be used to slope the instrument. Er2 may appear if the SLOPE key is pressed before the electrode and ATC/Temp probe settle to within +/- 30% of the buffer value.
- Page 13 +/- 1.5 pH of the buffer value. Allow sufficient time for the electrode to stabilize before taking any action. 2.5 Remove the pH electrode from buffer 7.00(model 6250/ model 6219) or 6.86(model 6250C/ 6219C), rinse with distilled water and immerse in buffer 4.01 or 10.01 (model 6250/ model 6219) or 4.00 or 9.18 (model 6250C/ model 6219C).
- Page 14 Removed the pH electrode and rinse with distilled water and immerse it in the sample to be measured and the ATC anniciator (model 6250) or green color LED lamp (model 6219) will be on (Per Figure 3). The pH unit , ATC, STAND and SLOPE indicators are on .
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Page 15: Temperature Measurements
TEMPERATURE MEASUREMENTS The two model 6250/6219 can be used to measure temperature independently with ATC/Temp probe with using the pH electrode. If the pH electrode is not connected to the instrument, the pH input must shorted to the reference input by the protect cap. - Page 16 Rinse the working and reference electrode with distilled water and immerse the two electrode in sample to be measured. Allow sufficient time for the display to stabilize. The instrument will display the millivolt value of the sample. If Er5 is displayed, the millivolt value measured is out of the +/-1999.9 mV range.
- Page 17 ION , anniciator 1 ( on the higher left cornor / model 6250) or red color STAND I LED (model 6219) lamp will flash and the conc. unit indicator will on. 1.5 Press the STAND/STAND I key, the LCD will display 1.00, anniciator 1...
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Page 18: Temperature Coefficient Of Ph Buffers
TEMPERATURE COEFFICIENT OF pH BUFFERS BUFFERS TEMP(C) 4.01 6.86 7.00 9.18 10.01 4.003 6.982 7.119 9.460 10.321 3.998 6.949 7.086 9.392 10.248 3.996 6.921 7.058 9.331 10.181 3.996 6.898 7.035 9.276 10.120 3.999 6.878 7.015 9.183 10.064 4.004 6.683 7.000 9.183 10.014 4.011... - Page 19 The Meter comes equipped with an RS232C (serial) interface. The meter communicates with a PC computer (100% IBM PC/AT compatibles) through a DB-9 interface connector (model 6250) or DB-25 interface connector (model 6219). using a standard RS232 cable for interconnecting two IBM PC/ATs can be use.
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Page 20: Warranty
If you purchased the item from our Jenco distributors and it is under warranty, please contact them to notify us of the situation. Jenco Service Department alone will determine if the product problem is due to deviations or customer misuse. -
Page 21: Return Of Items
For your protection, items must be carefully packed to prevent damage in shipment and insured against possible damage or loss. Jenco will not be responsible for damage resulting from careless or insufficient packing. A fee will be charged on all unauthorized returns.