Calibrator
Calibration Verification of the Product
7
adequate to guarantee the performance of the Product for its functions and ranges.
Warmup Procedure for All Verification Tests
Notes
Consider these grounding and guarding suggestions:
• For capacitance and inductance, disconnect the Guard from the Ground strap.
• For all other functions, connect the Guard to ground strap.
• When possible, set to external guard to control the guard of measurement instruments that are
connected to the Product.
Before verification:
1. Verify that the Product has warmed up for at least 30 minutes.
Note
If the Product has been powered off in an environment outside of operating environment
specifications, particularly with humidity above 70 %, allow a minimum of 2 hours for warm-up.
Extended storage at high temperatures and humidity can require up to 4 days of power-on
stabilization.
2. Ensure that the specified warm-up period for all test equipment has been satisfied per operational
requirements.
3. Ensure that the Product is in Standby (STANDBY annunciator lit).
4. Zero the Product. Zeroing adjusts internal circuitry, most notably dc offsets in all ranges of
operation. To meet the specifications, zeroing is required every 7 days, or when the Product
ambient temperature changes by more than 5 °C. There are two Calibrator zero functions: total
instrument zero (ZERO) and ohms-only zero (OHMS ZERO). Before you do the verification tests,
do the total Product zero.
To zero the Product:
1. Turn on the Product and allow a warm-up period of at least 30 minutes.
2. Tap the Setup softkey to open the Setup Menu.
3. Under Zero Adjustment, tap Run to open the calibration activity menu.
4. Push Continue as needed to step through the Zero Adjustment process. Push Abort to exit this
function. When the zero procedure is done (20 minutes), push
R to reset the Product.
An abbreviated summary of required equipment for all the verification tests is given in Table 1.
Individual lists of required equipment are included at the beginning of each test. The equipment and
methods selected in this manual are simplified to make it possible to calibrate the Product without
advance metrological techniques and may result in low test uncertainty ratios. Use of guardbanding
techniques is recommended to minimize acceptance risks - see Applying Guardbands to Specification
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