Setting Reference; Using Input Filter; Setting Input Filter; Diagnostic Modes - id LAB FOTOMETER 2008 COOL User Manual

Setting reference

To set reference press SET button bellow the reference you want to set. Current intensity
value is stored as reference value.

Using input filter

Light detector has two input filters. Fast filter is intended for measurement of values
changeable in time. It provides fast response with slightly increased noise level. Slow filter
suppress noise but has rather slow response time. Thus it is suitable for measurement of in
stable conditions when light intensity does not change fast.

Setting input filter

To adjust input filter press the FILTER button. The filter will toggle from slow to fast and
vice versa with every pres of the button.

Diagnostic modes

The device provides four diagnostic modes which are useful for troubleshooting. The
diagnostic modes are: zero offset, full scale, negative full scale, common mode rejection.
Mode
Zero offset
Full scale
Negative full scale
Common mode rejection

Switching to diagnostic mode

To switch to diagnostic mode press DIAG button. First diagnostic mode is selected. With
every consecutive press of DIAG button device will switch to next diagnostic mode. After
last diagnostic mode the device switch back to normal measurement mode.
While in diagnostic mode you can switch to normal measurement mode anytime by pressing
RANGE+, RANGE- or AUTO/MANUAL buttons.

Basic maintenance tasks

Replacing bulb in the light source

To replace the bulb in the light source follow the steps described bellow.
• Switch off the device.
• Disconnect cable between control unit and the light source.
• Remove six screws on the back cover of the light source using allen key number 3.
• Loosen the cable gland so the cable can move freely through the gland.
• Remove the metal sheet cover and slide it away on the cable.
• Carefully remove the teflon back cover and slide it away on the cable.
• Remove internal light source assembly off the cooling jacket.
• Remove two screws which hold the bulb at position. Remove old bulb.
Description
Both differential inputs of A/D converter are switched to ground.
Negative input of A/D converter is grounded. Positive is switched
to the voltage reference.
Positive input of A/D converter is grounded. Negative is switched
to the voltage reference.
Both differential inputs of A/D converter are switched to voltage
reference.