TB 9-4920-467-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Engine Torquemeter Test Set (ETTS) Ultrax, PN 09-1009-02.
The
manufacturers' manuals were used as the prime data source in compiling these
instructions. The equipment being calibrated will be referred to as the TI (test instrument)
throughout this bulletin.
a.
Model Variations. None.
b. Time and Technique. The time required for this calibration is approximately 4
hours, using the dc and low frequency technique.
2. Forms, Records, and Reports. Forms, records, and reports required for calibration
personnel at all levels are prescribed by TB 750-25.
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description.
Test instrument parameters
Performance specifications
Vpri
Range:
37.5 to 57.5 V ac
6 kHz
Accuracy:
1.0 V ac
Ipri
Range:
0.440 to 0.480 A ac
6 kHz
Accuracy:
0.005 A ac
Vt and Vc
Range:
+15.0 to +19.0 V dc
Accuracy:
0.020 V dc
Vx
Range:
0.05 to +0.05 V dc
(Difference of Vt to Vc)
Accuracy:
0.0008 V dc
Vo1/Vo2/Vo3
Range:
+1.000 to +5.200 V dc
Accuracy:
(0.1% + 0.001) V dc
<0.002 V dc @ +1.0 V dc inputs
VoCmp
Accuracy:
0.0 0.002 V dc
(Calculated from Vo1/Vo2/Vo3)
Accuracy:
0.0 0.008 V dc
VoCal
(Calculated from Vx and Vc and max of Vo1/Vo2/Vo3)
Jrtc
Range:
900 to 1100 ohms
J-Box Signature Resistance
Accuracy:
1.0 ohms
Jrt and Jrc
Range:
800 to 900 ohms
J-Box Signature Resistance
Accuracy:
1.0 ohm
Vt_DC
Output Level: +17.336 V dc
Vt Sim
Accuracy
0.015 V dc