Contrec 220 User manual

LEVEL MONITOR
MODEL 220
June 2017
220-M-V3.1

CONTENTS
1. Introduction 1
1.1 Model Number Designation 2
1.2 Intrinsic Safety Approvals 3
2. Specification 4
3. Operation 6
3.1 Display 6
3.1.1 Level Bar Graph 6
3.1.2 Contents 7
3.2 Front Panel Operation 8
3.2.1 Displaying Data 8
3.2.2 Changing Data 11
3.2.3 Timeout Condition 12
3.3 Test Mode 12
3.4 Alarms 13
3.4.1 Types of Alarms 14
3.4.2 Alarm Deadband 15
3.4.3 Alarm Action 15
3.4.4 Setting Alarms 17
3.5 Non-Linearity 18
3.6 Filtering 22
3.7 Density Correction 24
4. Programming 26
4.1 Program Steps 27
5. Signal Input 30
6. Alarm Outputs 31

7. Installation 33
7.1 Wall Mounting 33
7.2 Panel Mount Version 34
7.3 Removing the Front Panel 35
7.4 The Main Electronics 37
7.5 Wiring 38
7.6 Maintenance 38
7.7 Terminal Designations 39
8. Intrinsic Safety Connections 40
Index 42

Introduction 1
1. INTRODUCTION
The Model 220i Level Monitor is a microprocessor based instrument
which accepts a 4-20mA input and displays level and contents. It is
powered entirely from the 4-20mA loop and, therefore, does not require
an external power source.
Level is displayed in a bar graph as 0...100%. The contents are a 7 digit
numeric display which can be spanned in any engineering units.
The instrument is fully programmable; the user can program alarm settings,
span & zero levels and non-linear correction points. Calculation constants are
also set from the front panel and are stored in a non-volatile memory which
retains data indefinitely.
The Model 220i Rate Totaliser conforms to the EMC-Directive of the Council of
European Communities 2004/108/EC, the LVD directive 2006/95/EC and the
following standards:
EN61326:2013 Electrical equipment for measurement, control
and laboratory use – EMC requirements :
Residential, Commercial & Light Industry
Environment & Industrial Environment.
EN61010:2010 Safety requirements for electrical equipment
for measurement, control, and laboratory use.
In order to comply with these standards, the wiring instructions in Section 7.5
must be adhered to.

Introduction
2
1.1 MODEL NUMBER DESIGNATION
The Model Number of the 220i describes the input and output options installed
and the mounting options.
220 i . 2 M
Model Mounting
220i Intrinsically Safe 1Panel mount
version 2Wall mount
62" pipe bracket
Approvals
CCSA USA/Canada approval
MATEX/IECEx approval
Tank Conversion Software
220CSW

Introduction 3
1.2 INTRINSIC SAFETY APPROVALS
The Model 220i is certified for use in hazardous areas and has IECEx, ATEX
and CSA US/C approvals.
The Model 220i certification details are:
IECEx Approval IECEx BVS 15.0099X
Rating Ex ia IIB T4 Gb
ATEX Approval BVS 15 ATEX E 106 X
Rating II 2G EX ia IIB T4 Gb
Ambient Temperature: Maximum ambient temperature of 60°C.
CSA US/C Approval LR 104 840-5.
Type: Class 1, Groups C and D.
When installing in hazardous areas, the instrument will have to be
installed according to the guidelines given in Section 9 and in
accordance with standards for wiring and installation in hazardous
areas.
4-20mA Input
The input can be connected to IS circuits with the following maximum
values:
Ui = 28V
Ii = 93mA
Pi = 653mW
Relay Outputs
The outputs can be connected to IS circuits with the following
maximum
values:
Ui = 28V
Ii = 93mA
Pi = 653mW

Specification
4
2. SPECIFICATION
General
Display: Continuously powered LCD.
Level: 30mm bar graph.
Level Span: 0...100% per full scale.
Contents: 7 digit with 4½ digit resolution, 12mm (0.5") high.
Contents Span: The units of measure (eg. litres) at full scale
of input signal. The contents span is
programmable in the range of 0.000...9,999,999.
Volume: Either "Volume" or "Contents" can be
displayed.
This is user programmable.
Decimal Points: Decimal point positions for contents
is programmable in range of 0...3
decimal points.
Signal Type: 4-20mA.
4-20mA
Resolution and Linearity: 0.05% of span.
Accuracy: 0.05% of span @ 25°C.
0.1% (typically) of span full temperature range.
Update Time: 0.5 second.
Connection: 2 wire.
Voltage Drop: 2.5V maximum.
Outputs
Type: 4 open collector output alarms suitable for
driving dc solenoids or external relays. The
outputs
provide:
1. high-high.
2. high.
3. low.
4. low-low.
Switching Power: 200mA. 30Vdc maximum.
Saturation Voltage: 0.8Vdc across the output in the "on" state.
Isolation: All outputs are separately opto-isolated.

Specification 5
Physical
Operating Temperature: -20°C to 60°C.
Dimensions: 97mm (3.8") high x 150mm (5.9") wide x
41mm (1.6") deep (not including cable glands).
Protection: Nema 4X or IP67 standards.
Cable Entry: Cable glands.
Mounting: Universal mounting bracket is supplied as
standard.
Pipe Mounting: A galvanised metal bracket is available which
enables the instrument to be mounted on a
2"horizontal or vertical pipe.

Operation
6
3. OPERATION
The Model 220i Level Monitor accepts a 4-20mA input signal from a level
sensor such as a pressure transmitter, ultrasonic sensor or capacitance probe.
The instrument is powered entirely from the loop and, therefore, requires no
external power or internal batteries.
The instrument is fully programmable with all operating parameters
and calculation constants programmable from the front panel (see
Section 4.1). The setup parameters are stored in a non-volatile
memory and are retained for at least 10 years in the event of a
power loss.
3.1 DISPLAY
The display of the Model 220i comprises of:
Level Bar Graph
Contents
3.1.1 Level Bar Graph
The level bar graph displays the vertical level
of liquid as a percentage.
Inputs of 4mA and 20mA can be programmed
to correspond to 0% and 100% respectively, or
can be inverted so that 4mA will correspond to
100% and 20mA will correspond to 0%.
Note that the level is corrected for density
(if applicable) as described in Section 3.7.