Unit 2 — Equipment and Test Setup
TM-CAL-010 — Open Handout TM Chapter: Chapter 3 ELOs: Identify required equipment; understand test configuration Estimated time: 20 minutes
Step 1: Read the TM
Open TM-CAL-010. Read Chapter 3 — Materials and Construction completely.
Then come back here.
Chapter 3 Content
3-1. KELVIN PROBES AND FIXTURES
| Item | Description |
|---|---|
| DMM with 4-wire mode | Fluke 15B+ does NOT have 4-wire; requires Fluke 87V or bench meter |
| Kelvin clip probes | Paired force/sense clips per terminal (4 total) |
| Reference resistors | Certified 0.01% standard resistors: 0.1, 1, 10, 100, 1k Ω |
| 4-wire socket | DUT mounting with separated F+, F−, S+, S− connections |
NOTE: The Fluke 15B+ is a 2-wire meter and cannot perform true Kelvin measurements. For 4-wire work, use a bench DMM with Hi-Force, Lo-Force, Hi-Sense, Lo-Sense terminals, or construct a current-source circuit with separate voltmeter.
Equipment Readiness
Review the equipment list in Chapter 3 carefully.
Before beginning any calibration, verify every item on the equipment list is: - Present and in working order - Within its own calibration period (do not calibrate with an uncalibrated reference) - Set up per the configuration specified in Chapter 3
The reference quality is the ceiling on your calibration quality. A reference with unknown accuracy produces a calibration with unknown accuracy.
Self-Check Questions
SC2-1. List the three most important pieces of equipment specified in Chapter 3.
SC2-2. What reference standard(s) does the TM specify for this calibration?
SC2-3. Does Chapter 3 specify any warm-up time or settling requirement? If so, state it.
SC2-4. What is the test configuration? (How is the equipment connected or arranged?)
SC2-5. What would be the consequence of using a reference standard that is itself out of calibration?
Answer Key
SC2-1. See Chapter 3 equipment table or list. Identify the three items that appear first or are marked most critical.
SC2-2. See Chapter 3. The reference standard is the source of known-good values used to check the instrument under test.
SC2-3. See Chapter 3. Warm-up time is often specified for instruments that use oscillators or amplifiers — they need thermal stabilization before measurements are valid.
SC2-4. See Chapter 3. Describe the connection or arrangement in your own words, then verify against the TM.
SC2-5. The calibration error of the reference propagates directly into your calibration result. If the reference is 5% off and you do not know it, your calibration will also be 5% off — and you will not know that either.
Checkpoint
Before proceeding, you must be able to: - List the required equipment from memory - State the reference standard and its specified accuracy
→ Proceed to Unit 3