ecocool 150R
Operating Manual
Page 18
www.grantinstruments.com
5.1.5 Using the switch over relay output
An internal relay provides switch over contacts that can be used to control external
equipment. The pin connections on the rear panel 3 pin circular connector are:
For the connecting cable use a mating XLR style connector such as the NC3FXX
manufactured by Neutrik AG
The switch over contacts is rated at 24Vac or dc 2A maximum.
The relay is rated 24Vac or dc at 2A; to prevent injury or equipment damage,
do not connect to greater voltages or attempt to switch greater currents.
Voltages as low as 22Vac can be hazardous in locations where wetting of the
skin can occur. When making up cable to connect your equipment to the relay
connector, on the heating circulator, make sure that the insulation system
used is adequate to provide protection against the voltages output by your
equipment for switching by the relay.
Always use the correct size cable with correct class of insulation for the
voltage being switched. If in doubt contact the technical support team at
Grant.
5.1.6 Emptying the liquid tank
The tank should be emptied to a safe level prior to moving. A drain tap is included to at
the front of the equipment to allow convenient emptying. See section 4.2.2 figure 3 for
full details.
Liquid to be drained should not be below 10°C or above 50°C.
3
2
1
Normally Closed
Normally Open
Common
Rear Panel
Connector
Relay
