Contrec 103D User manual

MAN103D-V1.3
FIELD MOUNTED
RATE TOTALISER
MODEL 103D
APRIL 2019

MAN103D-V1.3

MAN103D-V1.3
CONTENTS
1. Introduction 1
2. Specification 2
3. Operation 4
3.1 Display 4
3.2 Test Mode 5
3.3 Filtering 6
3.4 Calculation of Rate and Total 8
3.5 Total Conversion 9
3.6 Frequency Cutoff 10
4. Programming 11
4.1 Program Steps 12
5. Example 17
6. Power 18
7. Flowmeter Input 20
8. Installation 25
8.1 Wall Mounting 25
8.2 Removing the Front Panel 26
8.3 The Main Electronics 28
8.4 Wiring 29
8.5 Maintenance 29
8.6 Terminal Designations 29
9. Disposal
9.1 Instrument Disposal 30
9.2 Battery Disposal 30
Index 31

MAN103D-V1.3

Introduction 1
MAN103D-V1.3
1. INTRODUCTION
The Model 103D Rate Totaliser is a microprocessor based instrument which
accepts a frequency or pulse input from a wide range of flowmeters. The
instrument displays flow Rate, a Resettable Total and an Accumulated Total
directly in engineering units.
The instrument is compatible with a wide range of flowmeters including turbine,
paddlewheel and positive displacement flowmeters.
The instrument is fully programmable from the front panel; the user can program
scaling factors, decimal point positions, filter constants and timebase.
The Model 103D Rate Totaliser conforms to the EMC-Directive of the Council of
European Communities 2014/30/EU, the LVD directive 2014/35/EU 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 8.4 must be adhered to.

2Specification
MAN103D-V1.3
2. SPECIFICATION
General
Display: LCD which is continuously powered.
Resettable Total: 7 digits with 10mm (0.4") high digits. Resettable
from front panel.
Accumulated Total: Displayed when the ACCUM TOTAL button is
pressed.
Rate: 4½ digits with 8.5mm (0.33") high digits.
K-factor: The pulses per unit of measure (eg. pulses/gallon)
is programmable in the range 0.000001 to
999,999.
Decimal Points: Decimal point positions are fully programmable
for both rate and total.
Timebase: Rate can be displayed in units per second, minute,
hour or day.
Frequency Range: 0.01Hz to 10kHz.
Signal Type: Link settable for sinewave (15mV P-P minimum),
open collector, reed switch, pulse or Namur
proximity switch (DC Power/Alarm Version).
Outputs: Two open collector outputs suitable for driving DC
solenoids or external relays. The outputs can be
programmed to provide high and low flow alarms
or pulse output and low flow alarm.
Switching Power: 200mA. 30VDC maximum.
DC Power Input: 9-28 Volt at 4mA maximum.
Supply Backup: 2 x User replaceable Lithium battery.
Pulse Duration: 1ms if CAL0 = 2 (unscaled pulse output).
If CAL0 = 1 (scaled pulse output) the duration of
the pulse automatically adjusts to the output
frequency:
a. 1ms if output > 50Hz.
b. 10ms if output = 5...50Hz.
c. 100ms if output < 5Hz.

Specification 3
MAN103D-V1.3
Physical
Temperature: Operating temperature: -20°C to 60°C.
Dimensions: 97mm (3.8") high x 150mm (5.9") wide x 41mm
(1.6") deep (cable glands not included).
Protection: Sealed to Nema 4X or IP67 standards.
Cable Entry: By cable glands.
Wall Mounting: Universal mounting bracket supplied as standard.
Pipe Mounting: A galvanised metal bracket is available which
enables the Model 103D to be attached to a 2"
vertical or horizontal pipe.
Cutout: 141mm (5.6") wide x 87mm (3.4" high).

4Operation
MAN103D-V1.3
3. OPERATION
The Model 103D Rate Totaliser accepts a frequency or pulse input from a wide
range of flowmeters. The instrument is fully programmable with all operating
parameters and calculation constants programmable from the front panel. 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 Model 103D displays:
Rate
Resettable Total
Accumulated Total
Both the Rate and Resettable Total are displayed continuously. The Accumulated
Total is displayed only when the ACCUM TOTAL key is pressed.
The keys on the front of the 103D have the following functions:
Pressing this key will display the
Accumulated Total.
This key resets the Resettable Total
at any time.
This key is used during the Program
Mode.

Operation 5
MAN103D-V1.3
3.2 TEST MODE
The 103D has a Test Mode which can be entered by simultaneously pressing all 3
front panel keys. The tests are as follows:
Low Test By pressing the ACCUM TOTAL key, the low alarm
output (if installed) will go low.
High Test By pressing the RESET key, and depending on the
programmed pulse output mode, the high alarm
output (if installed):
a. will go low if CAL0 = 0 (high alarm output).
b. will output 100ms pulses every 0.5 sec if CAL0
= 1 (scaled pulse output).
c. will output 1ms pulses every 0.5 sec if CAL0 = 2
(unscaled pulse output).
Display Test By pressing the PROGRAM key, all segments of the
display will flash.
To exit Test Mode, all three front panel keys are pressed simultaneously.

6Operation
MAN103D-V1.3
3.3 FILTERING
Frequency fluctuations caused by pulsating flow through a flowmeter can
interfere with the precision of the rate. For this reason, the Model 103D has a
digital filter which will average out these fluctuations and enable accurate
readings.
The degree of filtering of the input signal can be adjusted depending on the
amount of fluctuation and the particular application. Values from 1 to 99 can be
programmed where 1 corresponds to no filtering and 99 corresponds to heavy
filtering. Such flexibility in filtering means that highly accurate and stable
readings can be obtained.
When programming the degree of filtering, it is advisable to start with no filtering
(the factor equals 1) and gradually increase until a steady reading is obtained. It is
important that the filtering is not too heavy because this will cause an
overdamped response.
The following graph shows the time to reach 90% and 99% of a new reading for a
step change in input signal.

Operation 7
MAN103D-V1.3
Filter Factor vs Time to Reach New Reading
(for a step change in input signal)
0
20
40
60
80
100
120
010 20 30 40 50 60 70 80 90 100
Filter Factor
Time to Reach % of
New Reading (seconds)
90% of New Reading 99% of New Reading

8Operation
MAN103D-V1.3
3.4 CALCULATION OF RATE AND TOTAL
The flow rate, R, is calculated as follows:
where fis the input frequency in Hz (pulses/second).
His the timebase of rate and is 1 for seconds, 60 for minutes, 3600 for
hours and 86,400 for days.
Sis the scaling factor (pulses/unit volume).
The scaling factor, S, is equal to the K-factor of the flowmeter expressed in pulses
per unit volume. The K-factor is flowmeter dependant and is supplied with the
flowmeter. It will be either on a calibration certificate or stamped on the body of
the meter.
The user programs the scaling factor and selects the timebase during the
programming procedure.
Rf x H
S
=

Operation 9
MAN103D-V1.3
3.5 TOTAL CONVERSION
The Total Conversion Factor is programmed to enable the rate to be displayed in
one engineering unit and the totals to be displayed in another. For example, the
rate can be displayed in gallons/minute and the totals in barrels.
The Total Conversion Factor is a division factor which is used to convert the totals
to a different unit. Therefore, it only affects the totals (both resettable and
accumulated).
Example.
If the Rate is required in gallons/minute:
1. The Scaling Factor would be programmed as pulses per gallon.
2. The Timebase would be programmed as minutes.
If the Totals are required in barrels:
1. The Total Conversion Factor is programmed as 42 because there are 42
gallons in a barrel. All totals will now totalise in barrels.
Below is a table containing common units and their corresponding Total
Conversion constants:
Rate/Unit Time
Totals
Total Conversion Factor
Gallons (US)/Unit Time
Barrels (oil)
42.000
Litres/Unit Time
Kilolitres
1000
Litres/Unit Time
m3
1000
ml/Unit Time
Litres
1000
Mgallons/Unit Time
Acre-feet
0.32587

10 Operation
MAN103D-V1.3
3.6 FREQUENCY CUTOFF
A frequency cutoff can be programmed below which flow rate is not registered.
Input frequencies at or below the cutoff are totalised, however, the rate is
displayed as zero.
The frequency cutoff has a default value of 0.25Hz. The cutoff should be left as
0.25Hz unless the flowmeter in use has a lower frequency.
Note that a low cutoff frequency will result in a correspondingly low response of
flow rate update. For example, if the cutoff is set to 0.01Hz the 103D will
continue to display the flow rate for 100 seconds even if the signal stops. This is
because a cutoff frequency of 0.01Hz means that the time interval between
signals is 100 seconds (period = 1/frequency). Therefore, the Model 103D must
wait 100 seconds before it can determine that the flow has actually stopped.

Programing 11
MAN103D-V1.3
4. PROGRAMMING
The Model 103D is fully programmable with all parameters being stored in non-
volatile memory.
The Program Mode can be entered in one of two ways:
1. By removing the lower cover strip (ie. the dark grey strip along the bottom
of the enclosure) and replacing it the wrong side up. This brings a small
magnet on the inside of the cover strip in contact with a reed switch inside
the instrument.
2. By removing the front section of the enclosure which contains the main
processor board and batteries.
The PROGRAM switch is used to step through the program (CAL sequences) and
the (ACCUM TOTAL) and (RESET) keys on the front panel are used to change
and increment the flashing digits. Note that only flashing digits can be changed.
Up to nineteen CAL steps are accessible depending on which options are installed.
The CAL number is displayed on the lower display and the parameter is displayed
above it.
Parameters in Program Mode that consist of the two parts, whole numbers and
digits after the decimal point, are restricted to having a maximum of 6 significant
digits. Therefore the number of significant digits entered in the whole numbers
determines the number of digits that are able to be entered in the digits after the
decimal point.
For Example
000001 in the whole numbers makes 00000 available after the decimal place.
000100 in the whole numbers makes 000 available after the decimal place.
010000 in the whole numbers makes 0 available after the decimal place.

12 Programming
MAN103D-V1.3
4.1 PROGRAM STEPS
Step
Comment
CAL 0
Pulse Output
0 = No pulse output, low and high alarms.
1 = Scaled pulse output and low alarm.
2 = Unscaled pulse output and low alarm.
CAL 1
Scaling Factor - whole numbers.
CAL 2
Scaling Factor - digits after the decimal point.
The scaling factor is the pulses per unit of measure (eg.
pulses/litre, pulses/gallon, etc). The scaling factor can be
programmed in the range of 0.000001 - 999,999.
See Section 3.4.
CAL 3
Cutoff Frequency.
This determines the cutoff frequency in the range of 0.01 -
0.99Hz. The default setting is 0.25HZ.
Note that care must be taken when programming this value
because a low value may cause a slow update time.
CAL 4
Decimal Point for Rate Display.
The flow rate can be displayed with 0, 1, 2 or 3 decimal point
places.

Programing 13
MAN103D-V1.3
Step
Comment
CAL 5
Timebase for Rate.
The rate can be displayed in units per second, minute, hour
or day.
0 = second
1 = minute
2 = hour
3 = day
CAL 6
Filter.
The filter constant for filtering the input signal.
1 No filtering.
to
99 Very heavy filtering.
CAL 7
Decimal Point for Total Display.
The totals can be displayed with 0, 1, 2 or 3 decimal points.
CAL 8
Total Conversion Factor - whole numbers.

14 Programming
MAN103D-V1.3
Step
Comment
CAL 9
Total Conversion Factor - digits after the decimal point.
The total conversion factor enables the rate to be displayed in
one engineering unit and the totals to be displayed in another
engineering unit. The total conversion factor can be
programmed in the range of 0.000001 - 999,999.
Set to 1.000 if totals and rate are in the same unit, eg. litres.
See Section 3.5.
CAL 10
Low Alarm - whole numbers.
CAL 11
Low Alarm - digits after the decimal point.
CAL 10 to CAL 13 are displayed regardless of whether the
high and low alarms are installed. If the high and low alarms
are not installed, these parameters can be ignored.
CAL 10 & 11 program the flow rate below which the low
alarm relay will close. The value can be programmed in the
range 0.000000 to 999,999.
CAL 12
High Alarm or Pulse Output Factor - whole numbers.

Programing 15
MAN103D-V1.3
Step
Comment
CAL 13
High Alarm or Pulse Output Factor - digits after the decimal
point.
CAL 12 & 13 program the flow rate above which the high
alarm relay will close. The value can be programmed in the
range 0.000000 to 999,999.
If the scaled pulse output is selected (see CAL0 = 1), then the
value will represent the total per pulse, eg. 5 litres per pulse.
CAL 14
4mA Retransmission - whole numbers. N/A
CAL 15
4mA Retransmission - digits after the decimal point. N/A
CAL 14 to CAL 15 represent the flow rate at which 4mA will be
output. If the 4-20mA retransmission is not installed, these
parameters can be ignored.
CAL 16
20mA Retransmission - whole numbers. N/A
CAL 17
4mA Retransmission - digits after the decimal point N/A
CAL 16 & 17 are the flow rates at which the output will reach
20mA

16 Programming
MAN103D-V1.3
CAL 18
Enabling and number of points for linearisation
’00’ = Linearity Disabled; ‘02’ – ‘10’ number of points
If linearity is enabled by entering a number 02-10, then the
programming will request data as per the table below.
Input points are entered in ascending order.
INP 01 Input Frequency ‘01’ whole number
INP ...00 Input Frequency ‘01’ digits after decimal point
OUT 01 Scaling Factor ‘01’ whole number
OUT . 00…Scaling Factor ‘01’ digits after decimal point
Repeat the above for the remaining scaling factors.
Any frequency greater than that of the last linearity point will be
scaled at the last scaling factor.
SOFT
Software Version.