Tronair 5731, Operation & Service Instructions

Page: 64 / 119

Model: 5731
Hydraulic Power Unit
08/2016 | Rev. 08 Page | 59
12.0 CALIBRATION OF INSTRUMENTATION ( continued )
12.3 ANALOG PRESSURE GAUGE (Hand Pump Pressure- Option M Only )
12.3.1 Self Calibration
An accurate pressure calibration gauge is required for calibration of the Hand Pump Pressure gauge. Follow the necessary
steps below.
Shut off the HPU and disconnect it from the power source. Remove the
Hydraulic Panel from the front instrument panel (four
screws). Disconnect the hose from the Hand Pump Pressure gauge (remove gauge from panel if necessary). Attach
calibration test equipment to the gauge and record gauge values at the designated increments.
12.4 ANALOG TEMPERATURE GAUGE (Pyrometer)
12.4.1 Self Calibration
An accurate temperature calibration gauge is required for calibration of the Pyrometer. The pyrometer bulb is located in the
return manifold (rear of unit) and can be accessed by removal of the HPU top panel. See Section
9.7.2

Pyrometer for
location. Follow the necessary steps below.
1. Remove the pyrometer bulb from the return manifold by removing the slotted brass nut that retains the bulb in the well.
2. Connect the temperature calibration gauge to the bulb of the pyrometer.
The Temperature Value Must Be:
Pyrometer Temperature Display
(

F)
Minimum Acceptable
(

F)
Maximum Acceptable
(

F)
Temperature
Calibration gauge
(

F)
160 158 162
HAND PUMP PRESSURE GAUGE (HC-2146)
Applied Pressure
(Hand Pump
Pressure Gauge)
(psig)
Minimum
Acceptable
(psig)
Maximum
Acceptable
(psig)
Gauge Movement
(Direction)
Indicated Pressure
(Calibration Gauge)
(psig)
1000 700 1300 Increasing
2000 1700 2300 Increasing
5000 4800 5200 Increasing
8000 7700 8300 Increasing
10,000 9700 10,300 Increasing
8000 5940 8300 Decreasing
5000 4800 5200 Decreasing
2000 1700 2300 Decreasing
1000 700 1300 Decreasing
Allowable operating tolerance: +/- 3% of full scale (300 psig) at room temperature (70

F).
+/- 2% of full scale for middle third of scale (200 psig) at room temperature (70

F).