LaMotte MULTI-RANGE CONDUCTIVITY METER DA-1 1929 - Manual (Page 3)

PRO CE DURE
1.
Follow steps 1-3 in General Operating Procedure.
2. Set the range selector at “X100" and switch the control knob to the
”ON" position. Measure the temperature of the 6,668 micromhos/cm
solution (Solution #1) and set the “TEMP” knob accordingly.
Sufficiently immerse the probe in the solution to at least cover the
vent holes. Adjust the “STD” knob until the meter reading
corresponds to the solution value.
3. Remove the 4 screws from the meter panel and lift unit from the base
thereby exposing the internal circuitry.
4. Switch the control knob to the “CAL” position and adjust to a full
scale reading of 100 micromhos/cm by using the internal trim pot
labeled “full scale” located on the PC board where the switches are
mounted.
5. Switch the control knob to the “ON” position and the range selector
to “X1000.” The “TEMP,” “STD,” and internal calibration pot should
not be changed for the X1000 range. Sufficiently immerse the probe
in the 58,640 micromhos/cm solution (Solution #2) to cover the vent
holes. Adjust the trim pot labeled “X1000" located on the meter PC
board until the meter reading corresponds to the solution value.
6. The instrument is now calibrated for all ranges.
The following prepared conductivity solutions are available from LaMotte
Company. Use the specified code number to order.
STAN DARD CON DUC TIV ITY SO LU TIONS
DESCRIPTION SIZE CODE
0.0005M KCl, 74 micromhos/cm 500 mL 6416-L
0.005M KCl, 718 micromhos/cm 500 mL 6417-L
0.01M KCl, 1413 micromhos/cm 500 mL 6354-L
0.05M KCl, 6668 micromhos 500 mL 6418-L
0.5M KCl, 58640 micromhos 500 mL 6419-L
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SPECIFICATIONS FOR CONDUCTIVITY METER
METER
Range: Multi-Range
Low: 0-100 in 2 micromhos/cm in cre ments
Me dium: 0-1000 in 20 micromhos/cm in cre ments
Stan dard: 0-10,000 in 200 micromhos/cm in cre ments
High: 0-100,000 in 2000 micromhos/cm in cre ments
Ac cu racy: ± 2% full scale read ing (all ranges)
Pre ci sion: ± 0.5% full scale read ing (all ranges)
Power: Bat tery - sin gle 9 volt tran sis tor
Di men sions: 3 ¾”W x 2 5/8”D x 6 ¼”H
Weight: 1.7 lbs.
FUNC TION CON TROLS
Op er a tion Switch:
ON - Turns in stru ment on for read ing
OFF - Cuts off en ergy sup ply
BAT. CK. - To check bat tery re serve
CAL. (Cal i bra tion) - To cal i brate in stru ment
Stan dard ize: Cal i brates in stru ment by reg u lat ing volt age po ten tial
Tem per a ture Com pen sa tor: 0° to 100°C in 5°C in cre ments - ad justs in stru ment
to tem per a ture of sam ple be ing tested
Range Se lec tor: X1 - con duc tiv ity read ing times 1
X10 - con duc tiv ity read ing times 10
X100 - con duc tiv ity read ing times 100
X1000 - con duc tiv ity read ing times 1000
CON DUC TIV ITY PROBE
Range:
0-100,000 micromhos/cm
Size: 6" x ½"
Weight: 2 oz.
Ca ble Length: 3 ft.
Probe Con stant: 5.0/cm
El e ments: Car bon
CARRYING CASE
Di men sions:
10”W x 6”D x 6 ¼”H
Weight: With me ter, 3.5 lbs.
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