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6.2 Maintenance
1. The screen fails to display or doesn’t display clearly after power on
Check the contrast dial--use the plain screwdriver to adjust the “CONTRAST” dial rear of the
instrument.
2. The instrument does not operate at all; noting appears on LCD screen.
Check the mains voltage according to the page five “check the mains voltage”.
Check the power cord connection and connect the power cord properly.
Check whether the fuse is blown. If it is, replace it.
3. The printer does not operate; printout failure
Check whether the types of printer are right. T60 only supports HP ink jet printer (HP 5652 is
recommended) and mini temperature sensing parallel printer (WH153PT01 is recommended).
Check whether the printer connection is loose
Check whether the printer selection is right. UP stands for mini temperature sensing parallel printer,
while HP stands for HP inkjet parallel printer or laser jet parallel printer.
4. “ Cell init ERR” of initialization fails
Check whether there is opaque object in the sample compartment block the motor movement.
5.
“Lamp motor”, “W lamp”, “D2 lamp” and “WL check” of initialization fail
Check whether there is opaque object or cell in the sample compartment. Remove the opaque object.
Take out the cell after each measurement to avoid unnecessary intervention and corrosion to the instrument.
Check whether the mains voltage is too low, which may cause abnormal startup.
Check whether the W lamp or the D2 lamp is lit; if not, replace it.
6. Unstable
measurement
Check whether the instrument performs initialization normally. If you press
Ǐ
RETURN
ǐ
soon after
you power on, the instrument will not perform initialization or operate normally.
Take out the cell at current measurement status, and then press
Ǐ
ZERO
ǐ
to check whether 0.000Abs
is fluctuate. If it fluctuates between –0.001 and +0.001, it is normal. If it fluctuates widely, please confirm
the outer power supply meets the power requirements. Then, restart the instrument to perform initialization,
and confirm the initialization is normal.
If the sample compartment is blank, press
Ǐ
ZERO
ǐ
to check whether the 0.000Abs fluctuates
normally. Check whether the following problems exist:
1)
Check whether the volatility of the measured sample is high. If it is, please use the cell cover.
If you use the highly volatile gas, such as benzene, please perform measurement after remove
the interference gas by opening the sample compartment.
2)
Check whether the reagent blank used to zero meets the requirements. It stipulates that the
Abs of the reagent blank should be no more than 0.4Abs. If it is out of range, please replace
the reagent blank or the reference blank.
7. Poor reproducibility of the measured sample
Check whether the sample is stable and whether there is sample photolysis.
Check whether you use the right way to wipe off the cell. The cell should be wipe and clean carefully.
8. The card program is inoperative
Check whether you insert the program card. Make sure you insert it correctly.
Please refer to the instruction manual of the program card for the right way of loading it.
9. The Abs is not correct
Perform “Dark current correction”, then perform reagent blank, and then remeasure.
Confirm that the cells match each other.
10. Solutions to the frequently asked questions:
How to perform 0%T correction?
T60 is an automatic instrument, which should not perform 0%T correction each time when measuring.
For the automatic instrument, 0%T correction is also called dark current correction, which should not
always be performed. When the environment changes (e.g. temperature, voltage, ambient brightness), 0%T
correction needs to be performed. Select “dark current correction” from system set, and then performs.
How to change the tungsten lamp from the deuterium lamp, and vice versa?
