Model HF-15B High Frequency Spark Tester
HF-15B Instruction Manual – Page 46
Calibration
The Spark Tester may be reasonably expected to retain its accuracy for a period
of one year from the date of calibration under conditions of normal use.
CAUTION: The calibration procedures listed below are to be performed by
qualified service personnel experienced in high voltage safety procedures only.
Failure to follow these procedures may result in danger to personnel and
equipment.
The High Frequency Spark Tester Model HF-15B operates in the 3000Hz
frequency range and the equipment used to for the calibration should also be
rated for operation in this frequency range. The following is a list of
recommended equipment for use in calibrating the HF-15B.
• Electrostatic Voltmeter (EVM) – Manufactured by Sensitive Research
• HF-CAL – Manufactured by Clinton Instrument Company
• ST-CAL with HFVM – Manufactured by Clinton Instrument Company
ST-CAL Calibration
The HF-15B can be calibrated through an automated process using the STCAL
system with an HFVM.
To perform the calibration with the STCAL please follow the instructions for the
STCAL system.
HF-CAL Calibration Procedure
The HF-15B can be manually calibrated with the HF-CAL. Please follow the
instructions below.
Connecting the HF-CAL
1. Insert the banana plug on the green colored ground wire into the
“ground” terminal on the HF-CAL, and clip the other end to the ground
Stud on the rear of the HF-15B spark tester chassis.
2. With the power to the HF-15B Spark Tester turned off connect the
shortest possible white high voltage test lead to the “HIGH VOLTAGE
INPUT” terminal on the HF-CAL. For bead chain and brush electrodes
connect the alligator clip directly to the electrode. For roller type
electrodes you may need to wrap the high voltage roller with unin-
sulated wire and connect the alligator clip to the wire.
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