Thermo Technologies SMT 400 User Manual

Page 22

3.8

CALIBRATION TRIMMING SCREEN

Pressing and holding the

key for 10 seconds, reveals the calibration

trimming screen.

Use the

keys to select which sensor temperature value you want to

trim.

To alter the value of trimming, simply press the

key and the

temperature reading will change accordingly.

SECTION 4 - FAULT FINDING

Problem:

Nothing happens when the unit is powered-up.

Cause/Remedy:

One of the fuses could be blown - check and replace if
necessary (refer to specifications for values). If the fuses blow
again, contact the agency where the unit was purchased.

Problem:

The temperature display is fluctuating.

Cause/Remedy:

One of the sensor connectors may be loose, or a sensor may
be too close to a mains cable. Check sensor connectors and
re-route cables as necessary.

Problem:

The display screen is too dark or faint.

Cause/Remedy:

Adjust the display contrast to suit - see ‘Display Contrast’
(Section 3.2).

Problem:

The System Alarm light is flashing.

Cause/Remedy:

This indicates a system alarm warning, which may be caused
by a sensor fault or if the TM setting is exceeded (see Section
3.4 SET SCREEN 1). A sensor will show fault if it measures a
temperature above +99°C or below -15°C, this will not
damage the sensor and the fault condition will clear when the
sensor is operated within this range.