1 Introduction
1.1 General
Temperature Controllers GD100 and
GD120 are designed to be used with Grant P
series baths (plastic) for applications up to
99°C or Grant S series baths (stainless steel)
for applications to 120°C. They can also be
fitted to users own tank with a Grant
Instruments K clamp.
The GD100 and GD120 are identical except
that the GD120 has the following extra
features:-
D A temperature range up to 120°C
D A pump.
D An over-temperature cut out.
D A more powerful motor.
D Software with the ability to set a
countdown timer.
D Temperature range can be restricted
by programming in the liquid used
D A high level alarm can be set.
1.2 Advice on Servicing
Adjustment, maintenance and repair
of the unit described in this service manual
should only be carried out by qualified people
who are aware of the workshop practices
appropriate to the grade of servicing. In
particular, unit covers should only be
removed by people who have been trained to
avoid the risk of electric shocks.
In the U.K. units may be returned to Grant
Instruments Service Dept. at the following
address:-
29, Station Road,
Shepreth,
Cambridgeshire.
SG8 6GB
Customers outside the U.K. should contact
the agent for their country for help with
repairs.
After unpacking, retain packing case and
packing for transportation.
1.3 Cautions and Warnings
The safety statements in this service manual
comply with the requirements of the HEALTH
AND SAFETY AT WORK ACT 1974.
In particular, Caution and Warning
statements are given in the form shown:
CAUTION: Use to indicate a correct method
or procedure to be followed to avoid damage
to equipment and other property.
WARNINGS: Attention to the use of
materials, processes, methods, tools,
procedures or limits which must be followed
exactly to avoid personal injury.
1.4 Electrical Safety
This unit meets the requirements of
IEC61010 parts 1 and 2.
Some test and setting up procedures require
covers to be removed.
Take note of warnings given to prevent
electrical shock by contact with live
terminals.
Before any connection is made to an a.c.
power supply, ensure that the power outlet to
be used is provided with an effective earth
(ground) connection.
If the use of an extension cable cannot be
avoided, earth (ground) protection must not
be negated by the use of an extension cable
not having an earth (ground) conductor.
It is recommended that the a.c. power supply
is fitted with a residual current circuit breaker
WARNING: Any interruption of the earth
(ground) conductor or earth (ground)
connections within or outside the unit may
render the unit dangerous to use.
.
GD100/GD120
Part No. 17592/Issue 1 July 2002
Page 4
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