ary
all the gages he intends using during a test. This he can do with a
standard gage-testing outfit. By this means only can he have full
confidence in the accuracy of his results.

In like manner it is his duty personally to supervise the connecting and
arrangement of the gages, and the preliminary testing for leakage which
can be carried out simultaneously with the vacuum test made upon the
turbine casing.

Where Thermometers are Required

Equally important with the foregoing is the necessity of calibrating and
testing of all thermometers used during a test. Where possible it is
advisable to place new thermometers which have been previously tested
at all points of high temperature. Briefly running them over, the points
at which it is necessary to place thermometers in the entire system of
the steam and condensing plant are as follows:

(1) A thermometer in the steam pipe on the boiler, where the pipe leaves
the superheater.

(2) In the steam pipe immediately in front of the main stop-valve, near
point E in Fig. 75.

(3) In the main governing valve body (see I, Fig. 75) on the inlet side.

(4) In the main governing valve body on the turbine side, which will
register temperatures of steam after it has passed through the valve.

(5) In the steam-turbine high-pressure chamber, giving the temperature
of the steam before it has passed through any blades.

(6) In the exhaust chamber, giving the temperature of steam on leaving
the last row of blades.

(7) In the exhaust pipe near the condenser.

(8) In the condenser body.

(9) In the circulating-water inlet pipe close to the condenser.

(10) In the circulating-water outlet pipe close to the condenser.

(11) In the air-pump suction pipe close to the condenser.

(12) In the air-pump suction pipe close to the air pump.

It is not advisable to place at those vital points, the readings at
which directly or indirectly affect the consumption, two thermometers,
say one ordinary chemical thermometer and one thermometer of the gage
type, thus eliminating the possibility of any doubt which might exist
were only one thermometer placed there.

There is no apparent reason why one should attempt to take a series of
temperature readings during a consumption test on varying load. The
temperatures registered under a steady load test can be obtained with
great reliability, but on a varying load, with constantly changing
temperatures at all points, this is impossible. This