TB 9-1430-201-50
Table 1. Calibration Description - Continued
Test instrument
Model
Parameters
Performance specifications
DV311
Input resistance
10 and 100 kΩ 0.05%
Ratio linearity
0.005%
DV411
Input resistance
10 and 100 kΩ 0.05%
Ratio linearity
0.005%
DV412
Input resistance
10 and 100 kΩ 0.05%
Ratio linearity
0.005%
1454A
Voltage ratio
0.0001 to 1.0000 0.04% of indicated ratio for
input below 120 V
SECTION II
EQUIPMENT REQUIREMENTS
4. Equipment Required.
Table 2 identifies the
specific equipment used in
this
calibration procedure. This equipment is issued with secondary transfer calibration
standards set 4931-621-7877 and is to be used in performing this procedure. Alternate
items may be used by the calibrating activity when the equipment listed in table 2 is not
available. 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 accuracy 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 parenthesis.
5. Accessories Required. The
accessories listeds in
table 3 are issued with
secondary
transfer calibration standards set 4931-621-7877 and are to be used in this calibration
procedure. When necessary, these items may be substituted by equivalent items unless
specifically prohibited.
Table 2. Minimum Specifications of Equipment Required
Minimum use
Manufacturer, model
Item
Common name
specifications
and part number
A1
NULL DETECTOR
ESI, Model 801 MOD (7912151-2)
Sensitivity: 0.2 V/div
A2
ESI, Model 230B (7912150-2)
Range: 99Ω to 101 kΩ
and ESI, Model 801 MOD
Accuracy: 0.0125%
(7912151-2)
A3
VOLTAGE DIVIDER
Models T-10-A Series and TA-1001:
Range: 0.099 to 0.991
DV4107C (MIS-10274)
Accuracy: 0.025%
Model DP211:
Range: 0.1110899 to 0.99991
Accuracy: 0.0025%
Model DP311:
Range: 0.1111045 to 0.9999950
Accuracy: 0.00125%
Models DV411 and DV412
Range: 0.00105 to 0.90005
Accuracy: -0.00125%
Model 1454A
Range: 0.1111 to 0.900
Accuracy: 0.01%
3