Construction of the Device
Cooling-heating thermostat consists of:
Control panel.
Thermostat attached to the device block.
On the control panel of the unit are:
Control keys and LCD display. (see Fig 1)
On the rear panel of the unit are:
Plug-in cable.
Power switch.
Getting Started
Unpacking
Remove packing materials carefully and retain for future shipment or storage of the unit.
3.2 The PCH-1 set includes:
Peltier heater/cooler PCH-1.................................1 piece
12 x 1.5ml + 20 x 0.5ml capacity block................1 piece
External power supply unit .................................1 piece
Mains lead ...........................................................1 piece
Operating Manual; CE Certificate.........................1 copy
3.3 The PCH-2 set includes:
Peltier heater/cooler PCH-2 ................................1 piece
20 x 1.5ml capacity block ....................................1 piece
External power supply unit .................................1 piece
Mains lead ...........................................................1 piece
Operating Manual; CE Certificate.........................1 copy
3.4Plug the external power supply unit into the 12 V socket at the rear side of the PCH-1/2.
4. Operation 
4.1Connect power supply unit to the mains power.
4.2 Switch ONthe power switch located on the rear panel of the PCH-1.
4.3 The backlit display on the PCH-1 shows the following:
Previously set time and temperature.
Operation mode indicator, current time and temperature.
4.4 Temperature setting, use the T(°C) up/down keys ( ) to set the necessary temperature, (When the key is pressed down for 1 second or more, the temperature display changes quickly). Temperature increment is 0.1 °C.
Note that it is possible to change the set temperature in the real time, i.e. it is not
necessary to stop heating/cooling process to make these changes.
Connect power supply unit to the mains power.
4.5 To start heating/cooling to the set temperature press T (°C)on the RUN/STOP key (8) once.
4.6 The PCH-1/2 starts heating/cooling and the corresponding operation mode is indicated on the display (H - heating, C - cooling) (3). Current temperature is displayed in the second line of the display (1).
4.7 To stop the heating/cooling process press T (°C) RUN/STOPkey once again. It may take a few moments before the process stops and the operation mode indicator shows S - stopped.
4.8 When the necessary temperature is reached, open the PCH-1/2 block lid, place tubes into the sockets and close the lid. Use standard tubes, since the block sockets are made precisely in compliance with their size and shape.
4.9 The PCH-1/2 is equipped with an independent reaction timer. This alerts time-up with an audible alert; it does not control the heating/cooling process.
4.10 Use the TIMEup/down keys (6) to set the necessary time, shown in the first line of the display (4). (When the key is pressed down for 1 second or more, the time display changes quickly). Time increment is 1 minute.
Note that it is possible to change the set time in the real time, i.e. it is not necessary to stop the timer to make these changes.
4.11 Press TIME RUN/STOPkey (9) once, to start the timer. When the set time is reached the timer will stop and a buzzer will sound.
ATTENTION!:
The timer does not switch off the heating/cooling.
4.12 If necessary, the timer can be stopped before the set time is reached by pressing TIME RUN/STOPkey.
4.13 When TIME RUN/STOPkey is pressed again, the timer starts counting up the time from zero.
4.15 Once the heating/cooling process has finished, turn OFFthe PCH-1/2 with power switch located on the rear panel and disconnect the external power supply unit from the mains.
Maintenance
Where applicable all Grant laboratory products are designed to comply with IEC61010-1 and can be flash tested. Some are fitted with radio frequency interference suppressers. Therefore it is recommended that only a D.C. test be performed. No other routine service is required.
Cleaning
The cases can be cleaned with a damp cloth after disconnection. Do not use solvents.
Before using any decontamination or cleaning method except that recommended, check with our Service Department, or in other countries with our distributor, that the proposed method will not damage the equipment.
Specifications
• Temperature regulation range......................................- 10°C to + 100°C
Range of possible temperature from 30 C below Room Temperature to + 100 C
• Setting resolution............................................................................±0.1°C
• Working room temperature range...................................+15°C to +27°C
• Independent timer with sound signal..................................0 to 96 hours
• Time setting unit............................................................................minutes
• Current time display unit..............................................................seconds
• Display.........................................................................................16x2 LCD
• Capacity
PCH-1 ................................0,5 ml tubes x 20 psc + 1,5 ml tubes x 12 pcs
PCH-2 .......................................................................1.5ml tubes x 20 pcs
• Thermoblock cover..................................................................transparent
• External power supply;
input.....................................................AC 100-240 V, ~ 50-60 Hz, 1.5 A
output............................................................................DC 12 V, 5.0 A
• Maximum power consumption.........................................................60 W
• Dimensions.....................................................................240x260x165 mm
• Weight................................................................................................3.6 kg
To improve the design manufacturer reserves the right to make changes in specification without prior notice.
Guarantee and Service
Guarantee
When used in laboratory conditions and according to these working instructions, this product is guaranteed for TWO YEARS against faulty materials or workmanship.
Service
For service, return for repair to our Service Department in the UK or, in other countries, to our distributor.
Grant Instruments
(Cambridge) Ltd
Shepreth,
Cambridgeshire
SG8 6GB
Tel: +44 (0)1763 260811
www.grant.co.uk
Fax: +44 (0)1763 262410
Cooler heater/PCH-1/2/29195/9