Grant GR150 Manual De Operación página 13

Note: For the long term reliability of water baths it is important to use oxygenated water that is
free from ions and minerals that can cause corrosion. Grant recommend the use of distilled
water and de-ionised water from modern ion exchange systems with replaceable cartridges.
Do not use water from a system that incorporates a salt back flush system as this can leave
sodium ions that are corrosive to stainless steel.
70 to 150C
70 to 200C
3.3. Switching on and setting up
Connect the pump to your external circuit if required (see 2.2.6)
Connect the control unit to a grounded (earthed) electrical power supply with voltage and
frequency within the range specified on the serial number plate.
DO NOT SWITCH ON BEFORE FILLING THE TANK.
Before switching on for the first time, use a screwdriver to turn the set overtemperature
control fully clockwise. Press the set overtemperature reset to ensure that it is reset.
Switch the power on
Press the "S" button and rotate the "Navigation control" knob to set the required operating
temperature. Press "S" button again to fix this value. Wait until the liquid temperature has
stabilised at the operating temperature.
After the temperature has stabilised at the required set temperature, adjust the set
overtemperature control as follows:
Turn the control anticlockwise, using a screwdriver, until the alarm lamp comes on. Press
the reset and at the same time turn the control slowly clockwise until the alarm lamp goes out.
This gives an overtemperature trip point of approximately 30C above set temperature.
3.4. Function and Program Settings
Presets, Alarms, Timer, Programs, Pump speed, Liquid type, Iso Thermal Offset,
Internal or external probe, and Language selection can all be accessed by, when in
normal mode, pressing "F" and rotating the navigator control knob until the required
function appears in the LCD screen. Use the following flow diagrams as a guide to
access and change the parameters as and when required.
When required function is the LCD window, Press "S" to select. Pressing "F" will return display
back to normal mode.
Increasing the speed of rotation of the Navigator knob increases the step size of the
navigation control increment.
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and there may be a large loss of water due to evaporation. The control units
should not be used to boil water.
Silicone fluid with the following characteristics;

Viscosity 20 centistokes

Flash point ≥230°C

Fire Point ≥280°C
e.g. Dow Corning silicone fluid DC200/20. Follow manufacturer‟s instructions.
For safe disposal consult your Local Environmental Health Office.
Silicone fluid with the following characteristics;

Viscosity 50 centistokes

Flash point ≥285°C

Fire Point ≥340°C
e.g. Baysilone M 50 EL. Follow manufacture‟s instruction.
For safe disposal consult your Local Environmental Health Office.
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GR150, GP200
Operating Manual