TB 9-4920-469-24
Table 1. Calibration Description Continued.
Test instrument parameters
Performance specifications
Resistance
0.00 to 19.99 Ω (0 mΩ to 1999 mΩ with MOD D)
Model TT1000A
Range:
0.1% of reading 0.01 Ω (0.1% of reading 0.001Ω with MOD D)
Accuracy:
0.0 to 199.9 Ω (0 Ω to 1999 Ω with OPT B)
Range:
0.1% of reading 0.1 Ω (0.1% of reading 1 Ω with OPT B)
Accuracy:
20 Ω, 200 Ω, 2 kΩ, and 20 kΩ
Models TT1200
Range:
and TT1200A
Accuracy:
<0.05% of reading 2 counts
Insulation
0-1.999 MΩ in 1 kΩ increments
Model TT1000A
Range:
Accuracy: 3% of reading 0.003 MΩ.
200 kΩ, 2 MΩ, 20 MΩ
Models TT1200
Range:
200 MΩ
and TT1200A
Accuracy: 5% of reading 5 counts
10% of reading 5 counts (for 200 MΩ range)
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set, AN/GSM-286; AN/GSM-287; and AN/GSM-440. Alternate items may be
used by the calibrating activity. The items selected must be verified to perform
satisfactorily prior to use and must bear evidence of current calibration. The equipment
must meet or exceed the minimum use specifications listed in table 2. The accuracies listed
in table 2 provide a four-to-one ratio between the standard and TI. Where the four to one
ratio cannot be met, the actual accuracy of the equipment selected is shown in parentheses.
5. Accessories Required. The accessories required for the calibration are common usage
accessories, issued as indicated in paragraph 4 above and are not listed in this calibration
procedure. The following peculiar accessories are also required for this calibration:
Characterized type K thermocouple wire (IAW USATA 991) and DC Power Supply.
Table 2. Minimum Specifications of Equipment Required.
Manufacturer and model
Common name
Minimum use specifications
(part number)
CALIBRATOR
Range:
0.000 mV dc to 55.000 mV dc
Fluke, Model 5720A (5720A) (p/o
Accuracy: 10ppm
MIS-35947); w/ amplifier, Fluke
5725A/AR (5725A/AR)
COOL/HEAT SOURCE
Range:
19.4 to 26.1 C (67 to 79 F)
Fluke, Model 9011-A/B (9011-A/B)
Accuracy: 0.25 C (0.45 F)
Range:
0.95 to 48.85 mV dc
Hewlett Packard, Model 3458A
Accuracy: 56 ppm
(3458A)
1 Ω to 1 MΩ
RESISTANCE STANDARD
Range:
IET Labs, HARS-LX-9-0.001
Accuracy: 0.003 Ω
NO. 1
(HARS-LX-9-0.001)
1 MΩ to 200 MΩ
RESISTANCE STANDARD
Range:
IET Labs, HRRS-Q-4-1M-10KV-RM
NO. 2
Accuracy: 1.0%
(HRRS-Q-4-1M-10KV-RM)
