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6-1
SECTION 6
SERVICE INFORMATION
CLEANING
UNPLUG THE POWER CABLE. AVOID THE USE OF CHEMICAL CLEANING AGENTS WHICH MIGHT
DAMAGE THE PLASTICS USED IN THIS UNIT. DO NOT APPLY ANY SOLVENT CONTAINING
KETONES, ESTERS OR HALOGENATED HYDROCARBONS. TO CLEAN, USE ONLY
WATER SOLUBLE DETERGENTS, ETHYL, METHYL, OR ISOPROPYL ALCOHOL.
Exterior. Loose dust may be removed with a soft cloth or a dry brush. Water and mild detergent may
be used; however, abrasive cleaners should not be used.
Interior. Use low-velocity compressed air to blow off the accumulated dust. Hardened dirt can be
removed with a cotton-tipped swab, soft, dry cloth, or a cloth dampened with a mild detergent and
water.
TO AVOID PERSONAL INJURY FROM ELECTRIC SHOCK DO NOT REMOVE INSTRUMENT COVERS
OR PERFORM ANY MAINTANCE OTHER THAN DESCRIBED IN THIS MANUAL.
CALIBRATION PROCEDURE
Scope: To achieve rated accuracy, the 1750 must be calibrated within 6 months of initial purchase or
after being repaired. After the initial 6 months, the calibration interval may be extended to once every
12 months. The 1750 is digitally calibrated from the front panel. No internal adjustment is required.
Use this procedure to verify and make necessary adjustments to qualify the Model 1750 for NIST
traceable calibration.
Equipment: Full Scale Calibration Standard; 17501 Kelvin Klip™ Leads
Preparation: Power up the model 1750 and allow the unit to stabilize for 24 hours in a temperature
and humidity controlled environment. The temperature and humidity must be 23 °C ±1.0 °C, (73.4 °F
±1.8 °F), and a 50% (±5%) relative humidity environment.
Procedure
1. Change the calibration jumper, P9 position from operate to calibration mode. See page 6-5, Internal
Jumpers, for instructions on changing the jumper.
2. Depress the [MENU/CLEAR] key and select the Delayed Continuous Trigger Mode from the Trigger
Menu. Set the Delay Time to 111 ms.
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