Ohm-Stat™ RT-1000
CALIBRATION INSTRUCTIONS
1. Purchase 1%- 10
3
-10
12
ohm value resistors, high accuracy relative humidity
hygrometer, and a high accuracy thermometer. The resistors, hygrometer, and
thermometer must be NIST calibrated with a certificate of traceability.
2. Open meter being careful not to disturb or break the two wires connecting the
power button to the circuit board.
3 Observe on the right lower side of the meter printed circuit board three (3)
calibration pots.
4. ALLOW THE METER TO EQUILIBRATE AND NORMALIZE IN THE
ENVIRONMENT FOR 2 HOURS BEFORE TESTING.
5. Using the supplied coil cords attach the alligator clips to the banana plug ends of
the cords.
6. Insert the 3.5mm ends into the meter jacks.
7. Attach the ends of the resistors to the ends of the alligator clips.
8. The top one is for humidity. The middle one is for resistivity. The bottom one is
for temperature. Adjustment is done with a small screwdriver. Clockwise is to
increase the value, counter clockwise is to decrease the value.
9. Press the power button and compare the resistor value, humidity, and
temperature to the parameter to be calibrated.
10. Release the power button and slowly turn the correct adjustment pot.
11. Re-press the power button, and observe the LCD screen.
12. Re-press and adjust the pot if necessary.
13. Close case and tighten the 4 screws.
14. Press the power button to verify that the meter is working.
15. Record serial number and attach a NIST calibration certificate.
16. Record in data base for one year.
There is a conformal coating applied to the circuit board after calibration in order
to prevent inaccurate readings due to high humidity. Turning the adjustment screw
might be difficult. It will not hurt the meter.
***Should calibration traceable to the NIST be required, please call Static Solutions
Inc. directly to arrange for calibration.
For additional information please contact:
United Static Control Products
Email: techsupport@unitedscp.com
Prepared and written on: January 5, 2007 by Lenard Cohen
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