Ashcroft T400 DIRECT MOUNT Petunjuk Pemasangan dan Pemeliharaan - Halaman 3

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Installation and Maintenance Instructions for

T400 & T700 ASHCROFT

Switches for Temperature Control

As received, the temperature switch will normally be set to

approximately 90% of the indicated range. After stabilization,

turn the adjustment nut until switch changes mode. Direction of

turning is indicated on a label affixed to the inside of the control

enclosure. When setpoint has been achieved raise and lower

temperature to insure that the setpoint is correct.

After installation of the control replace cover to insure electrical

safety and to protect internal parts from the environment.

Deadband is varied by rotating the wheel on the precision switch.

T450 and T750 VARIABLE DEADBAND SWITCHES

When viewed from the front of the enclosure, rotation

to the left increases deadband – rotation to the right decreased

deadband. Letters on the wheel may be used as a reference.

Deadbands obtainable will vary from 0.5% to 9% of pressure

range depending on range segment.

As received, the temperature switch will normally be set to

ADJUSTMENT OF SETPOINT

approximately 90% of range. Rotate the wheel on the MICRO

SWITCH all the way to the right; this will provide smallest dead-

band. Increase bath temperature to the required setpoint and

turn the adjustment nut until the switch changes mode. Lower

the bath temperature to reset the switch. Rotate the wheel on the

MICRO SWITCH until the desired deadband is obtained. The

upper setpoint will be changing upward with this adjustment.

Lower the bath temperature to reset the switch. Raise the bath

temperature to the desired setpoint and turn the adjusting nut

until the switch changes mode. Lower the bath temperature and

check reset point and deadband.

Route wire leads from switch terminals so as not to interfere with

T428 & T429 MANUAL RESET SWITCHES

or touch reset button.

Note – As indicated above, adjustment of setpoint is made by

use of

⁄

˝ nut. Precision switch element mounting screws and

bracket adjusting screw are factory sealed and should not be

tampered with.

All sales subject to standard terms and conditions of sale. I&M009-10006-10/00 (250-2230G) 12/17

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