Vaisala HUMICAP MMT310 Uživatelská příručka stáhnout pdf (Strana 15)

Chapter 3 _________________________________________________________________Mounting

VAISALA _______________________________________________________________________ 13

Mounting the MMT318

NOTE

Do not unsolder and then again resolder the sensor head cable from

and to the printed board during installation; this procedure may alter

the humidity calibration of the transmitter.

Mounting for Pressurized Pipelines/Oils

Due to the sliding fit, the MMT318 is easy to install into and remove from the

pressurized process. The probe is especially suitable for the measurements in

pipelines.

MMT318 pipe dimensions (in mm); standard 178 (adjustment range 120

mm) and optional 400 mm (adjustment range 340 mm).

Adjust the probe to a suitable depth according to the type of installation and

tighten the clasp nut first manually. Mark the fitting body and the clasp nut.

Tighten the nut a further 50 - 60° (ca.1/6" turn) with a fork spanner. If you have a

suitable torque spanner, tighten the nut to 45±5 Nm (33±4 ft-lbs). Be careful not

to over tighten' the nut.

When the probe is used in a pressurized processes the sensor head should

preferebly be installed through a ball valve assembly.

1. clasp nut, 24 mm hex nut

2. fitting body, 27 mm hex head

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Vaisala HUMICAP MMT310 Uživatelská příručka Strana 15