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18-5-10 

TCH-150 & 460 

ADJUSTING THE CALIBRATION OFFSET 

 

 
 
 
 
 
 
 

 

                                 

 

 
 
 

                             
 
 
 
 
 
 

 
 
 
 
 
 

 

First step is to press the 
scroll button. The screen will 
then change to the PV Offset 
screen. 

CAUTION:

 The Offset 

value with few exceptions is 

between –0.5 and +1.5. 

The need to use a value 

outside this range should 

be carefully considered. If 

in doubt, return the value to 

zero

 and recalculate the 

offset value. 

Press the scroll key again to 
return to the original screen. 
The offset value will have 
changed to the new value. 
The instrument will then 
increase or decrease the 
output to alter the operating 
value. 

 

The scroll key has been 
pressed. The display shows 
the calibration (

PV

.

OFS

value. This value may be 
adjusted, small increments 
only. 

Note: PV.Offset is to 2 

decimal places.

 

 

Содержание TCH-150

Страница 1: ...t Pty Ltd T A Thermoline Scientific ABN 80 000 859 129 10 12 Ross Place Wetherill Park N S W 2164 Australia P O Box 6862 Wetherill Park Delivery Centre N S W 1851 Australia Phone 02 9604 3911 Internat...

Страница 2: ...pment be aware of the ALERT BOXES that appear throughout these operating instructions INDEX IMPORTANT INFORMATION Page 1 INDEX Page 1 2 PRODUCT WARRANTY Page 3 INTRODUCTION Page 4 THE MANUAL Page 4 UN...

Страница 3: ...HANGING THE SET VALUE Pages 13 ADJUSTING THE VENTS Pages 14 15 SENSOR CORRECTION FOR CALIBRATION PURPOSES Page 16 MEASURING EQUIPMENT Page 16 ADJUSTING THE CALIBRATION OFFSET Page 17 MAINTENANCE CLEAN...

Страница 4: ...stralia This warranty does not apply to refrigeration compressor s that are not protected by Thermoline Scientific factory installed VFP Voltage Fluctuation Protection unit 4 Limitation of Liability E...

Страница 5: ...ese items could be included as part of the packing list if ordered Water supply bottle 25 litre bottle complete with hose connection fittings 1 x 4 pin plug for retransmission connection Circular char...

Страница 6: ...d 10 amp power point WARNING Ensure that the electrical outlet is earthed is the correct voltage and capable of carrying the stated current Model TCH 150 is suitable for bench top or floor use whereas...

Страница 7: ...HE CABINET DURING SERVICE ASSEMBLY INSTALLATION ASSEMBLY SHELVES Place the shelves at the required level The shelf runners are fixed at 100mm centres PERSPEX HOLDER This holder is provided so that the...

Страница 8: ...er to gain access to the drain valve see photo 3 below The drain valve is shown in the closed position Note Prior to leaving the factory the water pressure regulator has been left fully open as it sho...

Страница 9: ...of products within the range shown below in the control envelope NOTE Temperature and humidity inside the cabinet can only be controlled at temperatures above the ambient WARNING Do not use flammable...

Страница 10: ...justable vents on top of the cabinet an air inlet and an air exhaust The operator can adjust these vents to increase or decrease the amount of ambient air that is mixed with the air inside the cabinet...

Страница 11: ...P a g e 10 18 5 10 TCH 150 460 Figure 1 Section side view of cabinet showing air flow EXPLANATION OF CONTROLS Figure 2 Control Panel Layout...

Страница 12: ...and quick recovery times Maximum recommended temperature is 80 C Humidity control This is a Eurotherm 3216 microprocessor based instrument with digital indication of set humidity and operating humidi...

Страница 13: ...off the fan and heating elements when the door is open 4 Position the mains switch to the ON position reset and immediately both controllers will go through a short initiation period the two displays...

Страница 14: ...e alarm will switch off all forms of heating if the actual temperature exceeds the set temperature by 2 0 C This will be indicated by a red flashing indicator and a scrolling message of Over Temperatu...

Страница 15: ...gher humidity both vents will be closed for lower humidity the vents will be more open The ambient temperature and humidity will have a large bearing on the temperature and humidity attainable inside...

Страница 16: ...P a g e 15 18 5 10 TCH 150 460...

Страница 17: ...the operator access level so that it can be used to correct the displayed operating value If adjustments need to be made use the calibration procedure below MEASURING EQUIPMENT Ensure that the equipme...

Страница 18: ...e should be carefully considered If in doubt return the value to zero and recalculate the offset value Press the scroll key again to return to the original screen The offset value will have changed to...

Страница 19: ...rocess There are several chemicals which will attack the surface of stainless steel plus the lack of oxygen at the surface will cause rusting corrosion and pitting Note Deionised water is particularly...

Страница 20: ...lly there is still enough pressure reduction through the valve even when fully open to reduce bounce When mains water is connected to the cabinet As described previously when town water is connected a...

Страница 21: ...65 Fan motor Betts 50D503 86A 5 70 Centrifugal blower wheel 5 66 Cooling fan blade 4 30 MRA Bit 02 pressure regulator 4 32 Water solenoid valve L171B13 ZZ23A 1 8 TECHNICAL ASSISTANCE If you require ad...

Страница 22: ...the cabinet for connection to an outside monitoring system which is able to accept the 4 20mA signals representing 0 0 to 100 0 C and 0 to 100 RH Maximum load to be applied to the analogue output is 5...

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