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OPTIMA RANGE GD120
Grant OPTIMA RANGE GD120 User Manual
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Grant Instruments
(Cambridge) Ltd
Shepreth
Cambridgeshire
SG8 6GB England
T
el: +44 (0)1763 260811
www.grant.co
.uk
Fax: +44 (0)1763 262410
Part No. 17592/Issue 1
July 2002
31
Table of Contents
Table of Contents
2
Introduction
4
General
4
Advice on Servicing
4
1.3 Cautions and Warnings
4
1.4 Electrical Safety
4
Connection to AC Power Supply
5
Specification Summary
6
Brief Mechanical Description
7
Description of Operation
7
AC Power Distribution and Component Interconnections
7
DC Power Supplies
7
Temperature Measurement and Control
7
Temperature Measurement
8
Temperature Control
8
Fault Finding
9
5.1 Test Equipment and Tools Required
9
Initial Tests
9
Fault Diagnosis
9
Removal and Access
12
Tools Required
12
Removal of Cover See Fig
12
Removal of Front Panel Assembly See Fig
12
Removal of Display PCB. See Figs 9
12
Removal of PSU PCB. See Figs 11
12
Removal of Heater. See Fig
12
Removal of Probe
12
Removal of Float Switch
13
Removal of Float and Float Shaft
13
6.10 Removal of GD120 Motor
13
See Figs 17 & 18
13
Removal of GD100 Motor See Figs 18
13
See Fig
14
Replacement of over Temperature
14
Cut-Out GD120 Only. See Fig
14
Setting up and Testing
14
Test Equipment Required
14
Functional Tests
14
Setting up DAC Output
14
See Fig
15
Heater Control
15
Calibration
15
Store Calibration Figures
15
7.7 Accuracy Check
15
See Fig
16
Electrical Safety Tests
16
Earth Bonding Test
16
Insulation Resistance Test
16
Final Inspection
16
List of Spare Parts
17
Drawings
18
Probe Resistance Values
18
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Grant OPTIMA RANGE GD120 Specifications
General
Brand
Grant
Model
OPTIMA RANGE GD120
Category
Temperature Controller
Language
English
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