Section 4
TM9211B-A-00
6 November 2013
4-2
Each 9211B is manufacturered to provide some of the best (i.e. lowest) uncertainies when
compared to other commercially available Multi-tap DC Current Shunts. After recalibration the
user should determine the Resistance Calibration Uncertainties by applying a uncertainty
calculation that includes uncertainties for drift, standards and equipment used, the calibration and
laboratory enviroment, and other uncertainties appplicable to that calibration.
Guildline offers Resistance Calibration Services, both accredited and non-accredited, from its
Smiths Falls Location. We can provide very good turn-around times with some of the lowest
uncertainties available today. 9211B Users may find the use of Guildline Calibration Services an
excellent convenience as well as a great alternative to maintaining their own calibration facilities to
support these standards.
4.4
Equipment and Standards Required for Calibration
The following Resistance Standards and Test Equipment is required for calibration.
Standards and Equipment Required:
Complete 6625A Resistance Measurement System with 6623A-300A Range Extender Installed (See
Below for Alternative Acceptable Equipment Models).
Or (Alternative Standards)
(a)
Direct Current Comparator Resistance Bridge (Acceptable Models)
Guildline Instruments 6622A Series DCC Resistance Bridge
Guildline Instruments 6675 or 6675A Series DCC Resistance Bridge
Guildline Instruments Model 9975A
(b)
Laboratory Grade Primary Resistance Standard (Acceptable Models)
Guildline Instruments 6634A-X Temperature Stabilized Resistance Standards
Guildline Instruments 9334A Series Air Resistance Standards
Guildline Instruments 9330 Series Oil Resistance Standards
(c)
Low Thermal Lead Sets or Low Thermal Wire (Acceptable Models) (for Rs) and Appropriately rated
leads for Current Leads (150 mA to 300 A)
Guildine 6622A : Precision Lead Set For Resistance Bridge
SCW-30:18AWG : 18 Guage Low Thermal Wire
92303 Lead Set (300 A, 1.5 m)
92321 Lead Set (150 A, 1.5 m)
92301 Lead Set (20 A, 1.5 m)
Summary of Contents for 9211B Series
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