Partlow MRC 7800 Operating Manual

Form 2971 • Price $21.00

Edition 7 • © October 1997

ONE AND TWO PEN CIRCLE CHART FLOW RECORDER

MRC 7800

Installation, W iring, Operation Manual

The Partlow-West Company • Two Campion Road • New Hartford NY 13413 • 315.797.2222 • Fax: [phone]

QUALITY INSTRUMENTATION DESIGNED & MANUFACTURED IN THE U.S.A.

PAGE 2

nformation in this installation, wiring, and operation
manual is subject to change without notice. One
manual is provided with each instrument at the time of

I

shipment. Extra copies are available at the price published
on the front cover.

Copyright © October 1997, The Partlow-West Company, all
rights reserved. No part of this publication may be repro­duced, transmitted, transcribed or stored in a retrieval sys­tem, or translated into any language in any form by any
means without the written permission of the Partlow-West
Company.

This is the Seventh Edition of the MRC 7800 Flow Recorder
manual. It was written and produced entirely on a desk­top-publishing system. Disk versions are available by writ­ten request to the Partlow Advertising and Publications
Department.

We are glad you decided to open this manual. It is written
so that you can take full advantage of the features of your
new MRC 7800 Flow Recorder.

Table of Contents

SECTION 1 - GENERAL Page Number 1.1

Product Description 5

SECTION 2­INSTALLATION & WIRING

2.1 Installation & Wiring 7

2.2 Unpacking 7

2.3 Location 7

2.4 Mounting 7

2.5 Preparation for Wiring 8

2.6 Wiring Connections 9

SECTION 3 - GENERAL OPERATION

3.1 How the instrument operates 14

PAGE 3

SECTION 4 ­CONFIGURATION & OPERATION

4.1 Configuration Introduction 18

4.2 Shipped Configuration / Jumper Positioning 19

4.3 Operation Summary 19

4.4 Start Up Procedure 20

4.5 Configuration & Operation 21

4.6 Data Logger Display Mode 32

SECTION 5 - SERVICE

5.1 Service 34

5.2 Changing Charts 34

5.3 Changing Pens 34

5.4 Calibration 35

5.5 Test Mode 37

5.6 Troubleshooting and Diagnostics 40

APPENDICES

A - Board Layouts

A-1 Processor Board 46
A-2A Relay (SPST) Output Board 47
A-2B Relay (SPDT) Output Board 48

A-3 Current Output Board 49
B - Glossary 50
C - Model Number Hardware Matrix Details 52
D - Specifications 53
E - Software Record/Reference Sheet 55

Warranty Inside Back Page

PAGE 4

FIGURES & TABLES

Figure 1-1 Front View 5
Figure 1-2 Display Features 6
Figure 2-1, Panel Dimensions 8
Figure 2-2 Board & Terminal Locations 9
Figure 2-3 AC Power Input 10
Figure 2-4 Volt, millivolt, & milliamp Input 11
Figure 2-5 Transmitter Power Supply Input 11
Figure 2-6 Remote Reset Input 12
Figure 2-7A Relay Output (SPST) 12
Figure 2-7B Relay Output (SPDT) 13
Figure 2-8 SSR Driver Output 13
Figure 2-9 Current Output-Standard 13
Figure 4-1 Keypad Features 19
Figure 5-1 Changing Pens 34
Table 3-1 Variable exponents of Parshall flumes 16
Table 3-2 Totalizer Factor 17
Table 3-3 Totalizer Factor Example 17
Table 4-1 Enable Mode Configuration Procedure 25
Table 4-2 Program Mode Configuration Procedure 26
Table 4-3 Alarm Set Mode Configuraton Procedure 30
Table 4-4 Data logger Setup Mode Configuration 30
Table 4-5 Preset Adjust Mode Configuration 31
Table 4-6 Data logger Display Mode Configuration 33
Table 5-1 Calibration Procedure 35
Table 5-2 Test Procedure and Description 37

Product Description 1.1

1.1.1 GENERAL

The instrument is a microprocessor based circular chart recorder capable of measuring,
displaying, recording, and datalogging flow process variables. Three square root extraction
algorithms are available for use with a variety of transmitters and transducers, and four
algorithms are available for use with a variety of weirs and flumes.

Recording functions, alarm settings, and other parameters are easily entered via the front
keypad. All user data can be protected from unauthorized changes by the Enable mode
security system, and is protected against loss from AC power failure by battery back-up.

The process input for each pen is user configurable to directly connect to either mVDC, VDC,
or mADC inputs. Changes in input type are easily accomplished in the field. The unit's
process input is isolated from the rest of the unit. An isolated 24VDC regulated transmitter
power supply can be provided for use with two-wire mADC inputs.

The unit can be ordered for either 115VAC or 230VAC power at 50/60Hz. The 230VAC
option includes a switch for changing back and forth between 230VAC and 115VAC. The unit
is housed in a plastic enclosure suitable for panel or surface mounting.

1.1.2 RECORDING

The unit incorporates a 10 inch circular chart. One box of standard charts is provided with
each unit. Charts are available in a wide selection of ranges. Chart rotation speed is
programmable from 0.1 to 999.9 hours per revolution in 0.1 hour increments. The instrument
can be provided with one or two pens. Pen 1 is red and Pen 2 is green. Pens are of the
disposable fiber-tip type. Changes in pens, as well as charts, are quickly and easily accom­plished.

PAGE 5

A programmable chart/display filter is provided. This filter provides adjustable dampening of
the value displayed and recorded. The filter need not be used. (Configured in program mode
as "dFF," Display Filter Factor.)

FIGURE 1-1

Pen 1
Auto/Manual

Display

Key

Select Key

Pen 2
Auto/Manual
Key

PEN 1 DISPLAY

Keypad
Scroll Key
Up Key
Down Key

PEN 2 DISPLAY

PAGE 6

1.1.3 DISPLAYS

Each unit is provided with an eight character digital display and status indicators for each pen
provided. The display provided in the upper right corner is for Pen 1, and the display in the
lower right corner is for Pen 2. Status indication is provided for Alarm 1 and Alarm 2. The
display is programmable for none, one, two or three decimal places for process value and
total, with additional scaling ability for the total. The second display is also optional on one
pen units with totalization for simultaneous display of the process value and total.

1.1.4 ALARMS

Alarm indication is standard on all units. Alarm settings are fully programmable. Alarm type
may be set as Process high or low. Indication is via status LED's provided for each pen.
Alarm outputs can be provided by assigning any specified relays (SPST, SPDT or SSR driver)
to the respective alarm.

1.1.5 PROCESS VALUE OUTPUT

If a unit is specified with 4 to 20 mADC outputs, these outputs may be programmed to
operate as a Process Value Output. As such, the output is scaleable.

FIGURE 1-2

PV

ALRM1 ALRM2

TOT

Installation & Wiring 2.1

CAUTION: The Instrument AC power input is as specified in the model number; 115VAC or 230VAC. Verify the AC power
input provided with the instrument prior to proceeding with installation.

Read these instructions carefully before proceeding with installation and operation. Electrical
code requirements and safety standards should be observed. Installation should be per­formed by qualified personnel.

Unpacking 2.2

Remove the unit from the carton and inspect it for any damage due to shipment. If any
damage is noticed due to transit, report and file a claim with the carrier. Write the model
number and serial number of the unit on the inside of the front cover of this Operation Manual
for future reference when corresponding with the factory.

Location 2.3

Locate the instrument away from excessive moisture, oil, dust, and vibration. Do not subject
the instrument to operating temperatures outside of 0 to 55˚ C.

PAGE 7

Mounting 2.4

Figure 2-1 (page 8) shows installation view and physical dimensions for a panel mounted
unit.

The panel that the unit will be mounted in must provide rigid support for the approximately 20
pound unit . Adjacent units may be mounted within a minimum of 2 inches horizontally and 3
inches vertically, providing that proper panel support is supplied.

PANEL MOUNTING HARDWARE REQUIRED: (not provided with instrument)

(4) 9/32" x 2" bolts w/nuts
(4) appropriate lockwashers

PANEL MOUNTING:

1) Cut panel hole to dimensions shown in Figure 2-1 (page 8).

2) If the rear of the panel is accessible for wiring after mounting, place the unit in the

panel cutout and fasten it to the panel through mounting holes supplied in the case
flange.

3) If the rear of the panel is not accessible for wiring, proceed with wiring preparation and
wiring, then mount the unit.

SURFACE MOUNTING:

1) If surface mounting is required, use Kit # 64402001 (ordered separately) Install mounting

brackets on sides of case and mount on the mounting surface.

PAGE 8

FIGURE 2-1

EC1

15 1/8

WIDTH OF COVER

2 19/32
(65.9mm)

12 5/8

7 1/2

(320.7
mm)

(190.5
mm)

Preparation for Wiring 2.5

(384.2
mm).

9/32

13 1/2

(342.5 mm )

13 15/16

(354 mm)

EC3

EC4

EC2

DIA.(7.1mm)

(64 mm)

13 3/16

(335 mm)

7/32

(5.5 mm)

Mounting
Bracket

3 3/4
(92.3 mm)

4 11/16

(119.1 mm)

(2)

2.5.1 WIRING GUIDELINES

Electrical noise is a phenomenon of the typical industrial environment. The following are
guidelines that must be followed to minimize the effect of noise upon any instrumentation.

2.5.1.1 INSTALLATION

Listed below are some of the common sources of electrical noise in the industrial environ­ment:
* Ignition Transformers
* Arc Welders
* Mechanical contact relays
* Solenoids
* Motors
Before using any instrument with devices listed previously, the instructions below should be
followed:

1. If the unit is to be mounted in the same panel as any of the listed devices, separate them
by the largest distance possible. For maximum electrical noise reduction, the noise
generating devices should be mounted in a separate enclosure.

2. If possible, eliminate mechanical contact relays and replace them with solid state relays. If
a mechanical relay being powered by the unit's output device cannot be replaced, you may
wish to use a solid state relay to isolate the instrument from this source of noise.

3. A separate isolation transformer which feeds only instrumentation should be considered. If
available, it can isolate many noise sources from the AC power input of the unit.

4. If the unit is being installed in an existing installation, a review of the wiring in the existing
area should be done.

2.5.1.2 AC POWER WIRING

5

4

2

Earth Ground
Each unit includes noise suppression components attached to the chassis that require an
earth ground connection. To verify that it is earth ground being attached, make a resistance
check from instrument chassis to the nearest metal water pipe or proven earth ground. This
reading should not exceed 100 ohms.

Neutral (For 115 VAC)
It is good practice to assure that the AC neutral is at or near ground potential. To verify this, a
voltmeter check between neutral and ground should be done. On the AC range, the reading
should not be more than 50 millivolts. If it is greater than this amount, the secondary of this
AC transformer supplying the instrument should be checked by an electrician. A proper
neutral will help ensure maximum performance from the instrument.

2.5.1.3 WIRE ISOLATION

The instrument is designed to promote proper separation of the wiring groups that connect to
the instrument. The AC power wire terminals are located near the top of the instrument
boards. The analog signal terminals are located near the bottom of the intrument boards.
Maintain this separation of the wires to insure the best protection from electrical noise. If the
wires need to be run parallel with any of the other lines, maintain a minimum 6 inch space
between the wires. If wires must cross each other, do so at 90 degrees. This will minimize the
contact with each other and reduces "cross talk". "Cross talk" is due to the EMF (Electro
Magnetic Flux) emitted by a wire as current passes through it. This EMF can be picked up by
other wires running in the same bundle or conduit.

PAGE 9

2.5.1.4 USE OF SHIELDED CABLE

Shielded cable helps eliminate pickup of noise the wires may be exposed to. Shielded cable
is a single or multi-pair of insulated wires with each wire or pair of wires surrounded by a wire
mesh or conductive foil and then covered with plastic insulation.

It is recommended that all analog signals be run with shielded cable. Connection lead length
should be kept as short as possible, thus keeping wires protected by the shielding. The shield
should be grounded at one end only, at the transmitter or transducer and the shield should be
stripped back before going inside the unit case .

Wiring Connections 2.6

All wiring connections are typically made to the unit with it installed. Connections should be
made at the terminal blocks, two 12 gauge wires maximum, using copper conductors only.
Terminal blocks are designated TB1 thru TB13. See Figure 2-2 for the terminal block
locations.

FIGURE 2-2

Processor Board

12

TB1

1 2 3 4 1 2 3 4 1 2 3

TB6 TB7 TB8

RELAY/SSR Driver
Board

TB9

1 2 3 4

Current Output Board

TB 2

1 2

TB3 TB4

1 2 1 2 3 4 5 1 2 3 4

TB5

TB10 TB11 TB12 TB13

1 2

1 2 1 2 1

PAGE 10

2.6.1 ELECTRICAL CONDUIT OPENINGS

The instrument case will have 3 or 4 conduit openings, depending upon the number of outputs
specified. To help minimize electrical noise that may adversely affect the operation of the
instrument, the wires indicated below should be routed through the conduit opening specified.
See Figure 2-1 (page 8) for conduit opening locations.

EC1 - AC power
EC2 - Analog input and mAdc outputs
EC3 - SPST, SPDT relay or SSR driver outputs
EC4 - SPST, SPDT relay or SSR driver outputs

(provided when > 4 relays & SSR's are specified)

Unused conduit openings should be sealed if exposed to the environment.

2.6.2 AC POWER WIRING CONNECTIONS
WARNING: To avoid electrical shock AC power wiring must not be

connected at the source distribution panel until all wiring connections are completed.

FIGURE 2-3

AC Instrument Power Input
Connect the 115 VAC hot and neutral to terminals 1 and 2 respectively of TB1. See Figure 2­2 (page 9) for Terminal Board locations on the instrument. Connect the 230 VAC one leg to
each terminal, be sure to check the position of the Voltage Selector switch provided with 230
VAC instruments. The switch position must match the voltage input to the instrument.

Connect the AC
ground at the
green ground screw
on the left side of
the inside of the
case

Line 1

TB1

1

Line 2

2

FIGURE 2-4

-

-

-

-

-

-

Volt, Millivolt and milliamp Input
Make the volt, millivolt or milliamp conections as shown below. Use TB4 for Pen 1 and TB5
for Pen 2. Terminal 1 is positive and terminal 2 is negative. Be sure that input conditioning
jumpers are in the correct positions for the input being connected. See Appendix A-1 (page

46).

TB4 or TB5

PAGE 11

+

-

2345

1

SHIELDED

NOTE: Fault Detection
Not Functional for 0-5V
Input.

TWISTED
PAIR

MAY BE

+

SOURCE

GROUNDED
OR
UNGROUNDED

FIGURE 2-5

Transmitter Power Supply
If the isolated 24 VDC regulated transmitter power supply has been specified, the connections
should be made as shown. Connections are made using TB3, terminal 1 is positive and
terminal 2 is negative. The power supply is capable of providing the power needed by up to 2
transmitters.

TB3

TB4 or TB5

TB3

TB4

TB5

+
12

+

-

12345

SHIELDED

TWISTED

PAIRS

+

12

+

TWO WIRE

TRANSMITTERS

TWO WIRE

TRANSMITTERS

+

-

12345

+

TWO WIRE

TRANSMITTERS

+

-

12345

+

PAGE 12

5

FIGURE 2-6

Remote Reset Input
Make connections as shown. Use TB4 for Pen 1 and TB5 for Pen 2. Terminal 3 is ground
and terminal 4 is the input.

TB4 or TB5

+

-

1 2 3 4

SHIELDED
TWISTED
PAIR

REMOTE
DRY
CONTACT

2.6.3 OUTPUT CONNECTIONS

Relay outputs, if provided in the instrument, may be assigned to alarm, preset, or pulsed
output functions for Pen 1 and/or Pen 2 (if present). Current outputs may be assigned to
process value retransmission output for Pen 1 and/or Pen 2 (if present). The assignment of
the output function is accomplished in the Program mode, see Section 4.5.3 (page 22).
SPST relay and/or SSR driver output(s) is/are designated as Relay A through Relay H. SPST
relays begin with Relay A designation, then B, C, etc. SSR drivers begin with Relay H
designation, then G, F, etc.

FIGURE 2-7A

Relay Output (SPST)
Connections are made to relays A through F as shown. Terminal connections are made
using TB6 (Relay/SSR Driver A, B), TB7 (Relay/SSR Driver C,D), and TB8 (Relay/SSR Driver
E, F).

HOT
NEU

POWER

LOAD

5 AMPERES

1234

MAXIMUM
AT 115 VAC

TB6 OR TB7 OR TB8

FIGURE 2-7B

7

-

-

Relay Output (SPDT)

HOT
NEU

PAGE 13

POWER

LOAD

N.O C

TB6 OR TB

FIGURE 2-8

SSR Driver Output
Connections are made to relays H through A as shown. Terminal connections are made
using TB9, TB8, etc. depending on the number of SSR Driver outputs specified.

1 234

N.C

123

+

SSR

5 AMPERES
MAXIMUM
AT 115 VAC

SOLID STATE RELAY

TB6 THRU TB9

FIGURE 2-9

Current Output
Connections are made to standard current outputs A through D as shown. Each current
output is programmable as either 4 to 20mADC or 0 to 20mADC. Each output must be
assigned to the desired function (refer to Table 4-2, page 26, for details). Terminal connec­tions are made using TB10 through TB13 for current output A through D respectively. Con­nect positive lead (+) to terminal 1 and the negative lead (-) to terminal 2. Current outputs will
operate up to 650 ohms maximum load.

+

-

1 2

SHIELDED
TWISTED
PAIR

+

LOAD

650 OHMS
MAXIMUM

PAGE 14

How The Instrument Operates 3.1

3.1.1 OFF MODE

In the Off mode, the instrument alarm and preset function(s) is/are turned off, pulsed output(s)
are inactive and process retransmission signal(s) remain(s) active. The chart rotation can be
selected in the Program mode to stop or continue to rotate when the instrument is in the Off
mode. The pen remains active. The totalization function is inactive, but datalogging functions
continue.

The Off mode is entered by pressing and releasing the SCROLL key until the display reads
oFF, then pressing the DOWN key. If the instrument was displaying process value, the
display will read oFF, then the current process variable at two second intervals. If the
instrument was displaying total, the display will read oFF, then the total at two second
intervals. Entering the Off mode of a dual pen instrument will cause both pens to enter the Off
mode. The second pen display will be blank as the upper display reads oFF and displays the
value for the second pen at the same time as the upper display.

To exit the Off mode, depress the SCROLL key to proceed to any other mode, pressing the
DOWN key to enter that mode.

3.1.2 OPERATE MODE

In the Operate mode, the instrument alarm function(s), the preset function(s), the pulsed
output(s) and the process retransmission signal(s) are actively responding to the process
variable as selected in the Program, Alarm Set and Preset modes and the chart will be
rotating at the rate selected. The totalization function is active, as is the datalogging function.

3.1.2.1 TOTALIZATION

Totalization can be implemented on instruments provided with the totalization feature.
Totalization can be programmed on or off for each pen.

To initiate totalization, depress the SCROLL key until oPEr is displayed, then depress the
DOWN key.

To view the total, depress the DISPLAY SELECT key once with the PV value displayed. The
TOT light should be lit and the total for Pen 1 in the upper display and the total for Pen 2 in the
lower display.

Instruments with Totalization and second display will have the total displayed in the lower
display whenever the upper display is set to PV.

On two pen units only, a Combined Total is available. When activated in the Program mode
an additional step is added to the display choice sequence provided by the Display Select
Key.

If the totals are displayed and the DISPLAY SELECT key is depressed, the Combined Flow
Rate will appear in the top display with a C in the leftmost digit and the Combined Total will
appear in the bottom display. The PV and TOT indicators will be lit, respectively.

Note: When Combined Total is being used, it is required that the decimal position,
dPoS, and totalizer decimal position, tdP, in the Program mode, for both pens are the
same. When the totalizer for Pen 1 is reset, the combined total is also reset.

Upon sensor break, the Combined Total will increment at a indeterminate rate.

3.1.2.2 PULSED OUTPUTS

Pulsed output(s), one for each pen, can be implemented on instruments provided with the
totalization feature and a relay that is not assigned to any other function.

Pulsed output is selected in the Program mode. With a pulsed output select (PoS) equal to 1,
each time the Totalizer Display is incremented, the relay that is assigned, in the Program
mode, as a pulsed output will close for a duration of 50 milliseconds or 60 milliseconds based
on a 60 Hz or 50 Hz line frequency, respectively.

On two pen instruments, a Combined Pulse Output is available. This feature provides a
pulsed output as the Combined Total increases.

Note: Upon sensor break, the Combined Pulse Output will increment at a indetermi­nate rate.

3.1.2.3 PROCESS VALUE RETRANSMISSION

Process value retransmission can be implemented on instruments provided with at least one 4
to 20mA output.

Process value retransmission is selected in the Program mode. When selected, a current
output must be assigned and the process output must be scaled.

On two pen instruments, a Combined Flow Rate is available. When selected in the Program
mode, this feature provides a process value retransmission value equal to the combined flow
rate. The value is scaled using Pen 1 process output upper and lower parameters.

PAGE 15

3.1.2.4 DATA LOGGING

Data logging can be implemented on instruments provided with the data logging feature, and
it will store data for up to 28 days.

Each day, at the time specified by ttLd (time to log data), the following data will be logged:
date, minimum rate, its time, maximum rate, its time, daily total, and average rate. The daily
total is derived by substracting "yesterday's total" from the current total. The average rate is
derived from the daily total, taking into account the flow time base. After the data is logged,
"yesterday's total" will be set to the current total, and the minimum and maximum rates and
times are set to the current rate and time.

Logged data is accessed via a day number, with 1 through 7 corresponding to the current
week. At the beginning of each week (00:01 on day 1 - each Monday) the data is shifted
down one week, with the oldest weeks worth of data being discarded. All data for the current
week is zeroed, including the date for each day.

3.1.2.5 ENGINEERING UNITS PROCESSING ALGORITHM

In the Program mode, the parameter EuPA, Engineering Units Processing Algorithm specifies
how the engineering unit inputs are handled. This allows selection of the various algorithms
to convert the raw input in to the desired process value.

LINEAR CONVERSION - EuPA = 0
For those sensors/transmitters that provide an output directly proportional to flow, or other
applications where the instrument may be used with a linear input to output transformation.

SQUARE ROOT EXTRACTION - EuPA = 1
The square root extraction function applies to rate of flow measurments using differential
pressure sensors. Differential pressure transmitters typically generate a 4-20mADC signal
that represents differential pressure, not flow. The flow is a function of the square root of the
differential pressure.

2 STAGE SQUARE ROOT EXTRACTION - EuPA = 2
This approach is used to minimize the process value below a 4% input, since it is less
meaningful due to inaccuracy and repeatability problems. Below 4% a linear function is
applied.
(Continued on next page)

PAGE 16

3 STAGE SQUARE ROOT EXTRACTION - EuPA = 3
This approach is used to further minimize the process value below a 1% input, since it is even
less meaningful. Below 1% a low gain linear function is applied. Between 1% and 2.5% a
higher gain linear function is applied. Above 2.5% the square root function applies, as the
sensor begins to provide a reasonably accurate and repeatable output. Refer to the glossary
(page 53).

VARIABLE EXPONENT - EuPA = 4
Open channel flow is used in wastewater and other applications. For rectangular weirs, the
flow is proportional to the height/head to the 3/2 power. For triangular (or V notch) weirs, the
flow is proportional to the height/head to the 5/2 power. For Parshall flumes, the flow is
proportional to the height/head to approximately the 3/2 power. See Table 3-1. When
variable exponent is selected in the Program mode, Engineering Units Exponent, EuE, must
be set for the correct exponent value.

TABLE 3-1

The exponent for a number of common Parshall flumes are as follows:

1 - inch = 1.55
2 - inch = 1.55
3 - inch = 1.547
6 - inch = 1.58
9 - inch = 1.53
1 to 8 ft = 1.522w raised to the .023 power
10 to 50 ft = 1.6

w = throat width in feet

PIECEWISE LINEAR - EuPA = 5
For some applications, the relationship between the input and process value cannot be
specified by one of the available algorithms. For these instances, the relationship can be
approximated by a straight line relationship over portions of the span. Provided enough
pieces, this method will provide the required accuracy. When piecewise linear is selected, the
second set of Engineering Units parameters, Euu2 and EuL2 must be used to specify the

span of the input, and then iu1, iu2....iu20 and Pu1, Pu2.....Pu20 are the input and process

values for the respective points, in engineering units.
VARIABLE EXPONENT WITH CORRECTION - EuPA = 6

For some applications, the relationship between the input and process value can be basically
characterized as exponential, but not to within the accuracy desired. Use of the Piecewise
Linear algorithm may require a large number of points to provide the desired accuracy. By
using the piecewise linear method to provide a correction to the simple exponential, a high
degree of accuracy can be achieved. This is especially applicable to open channel flow using
Palmer-Bowlus flumes or H flumes. Consult factory for assitance, if needed, when using
variable exponent with correction.

SATURATED STEAM FLOW WITH PRESSURE CORRECTION - EuPA = 7
Only available with a 2 Pen unit. For saturated steam flow, accurate flow measurement is
dependent on pressure correction. By using the second pen to input and record pressure, the
pressure data is available to correct the flow value. The input is typically gauge pressure,
which is converted to absolute pressure by the instrument. Since the pressure may be in the
60 PSIG range, barometric pressure or elevation can induce an error. Therefore, the baro­metric pressure, bAro, needs to be set in the Alarm Set mode. If the input is absolute
pressure, bAro must be set ot zero.

3.1.2.6. TOTALIZER FACTOR

Scaling of the displayed total is possible, with the use of totalizer factor, tFAC. When used,
the displayed value is multiplied by a factor to obtain the actual total. See Table 3-2.

TABLE 3-2

tFAC = 0 Actual Total = Displayed Total Times 1
tFAC = -1 Actual Total = Displayed Total Times 10
tFAC = -2 Actual Total = Displayed Total Times 100
tFAC = -3 Actual Total = Displayed Total Times 1000
tFAC = -4 Actual Total = Displayed Total Times 10000
tFAC = 1 Actual Total = Displayed Total Times 0.1
tFAC = 2 Actual Total = Displayed Total Times 0.01
tFAC = 3 Actual Total = Displayed Total Times 0.001

Example
An application is measuring flow at a maximum rate of 6000 gallons per minute (6000 gpm).
The steady flow rate is 2000 gallons per minute (2000 pgm). Table 3-3 shows how, with
various settings in the Program mode, the process variable displayed and the total displayed
can be configured.

PAGE 17

TABLE 3-3

6000 gpm, flow rate 2000 gpm
dPoS Euu EuL PV tdP tFAC Ftb Total displayed at t = 1 min

0 6000 0 2000 0 0 2 XXXX2000
0 6000 0 2000 0 -1 2 XXXXX200
0 6000 0 2000 0 -3 2 XXXXXXX2

6000 gpm, flow rate 2000 pgm, PV in gps
dPoS Euu EuL PV tdP tFAC Ftb Total displayed at t = 1 min

0 100 0 33 0 0 1 XXXX1980
0 100 0 33 0 -1 1 XXXXX198
0 100 0 33 0 -3 1 XXXXXXX1

6000 gpm, flow rate 2000 gpm, PV in gpm
dPoS Euu EuL PV tdP tFAC Ftb Total displayed at t = 1 min

0 6000 0 2000 1 0 2 XXX2000.0
0 6000 0 2000 1 -3 2 XXXXXX2.0

6000 gpm, flow rate 2000 gpm, PV in gps
dPoS Euu EuL PV tdP tFAC Ftb Total displayed at t = 1 min

0 100 0 33 1 1 1 XXX1980.0
0 100 0 33 1 -3 1 XXXXXX1.9

6000 gpm, flow rate 2000 gpm, PV in mgd
dPoS Euu EuL PV tdP tFAC Ftb Total displayed at t = 1 min

3 8.640 0.000 0.002 0 0 4 XXXXXXX0
3 8.640 0.000 0.002 0 3 4 XXXXXXX2
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PAGE 18

Configuration Introduction 4.1

After completing installation of the unit, the configuration procedures contained within this
section must be performed to prepare the unit for operation on the intended application. The
procedures include selecting specific parameters, entering data and possible jumper position­ing.

Parameter selections and data entry are made via the front keypad. To ease configuration
and operation, user entered data has been divided up into several modes. Each mode
contains a different type of data or may be used for specific operating functions. For two pen
instruments, each mode is common to both pens. These modes are as follows:

Mode Display Code Function Description

Off oFF Operation Alarm Outputs off, Totalization off
Operation oPEr Operation Operation
Program Prog Configuration Configure operating parameters
Alarm Set ASEt Configuration Set alarm settings
Data logger dLS Configuration Adjust/set real time and log time

Setup
Data logger dLd Operation View logged data

Display
Preset PSA Operation Adjusts, sets preset values

Adjust
Test tESt Service Perform unit tests
Calibration CAL Service Perform unit calibration
Enable Enab Configuration Lockout or enable access to any

mode

Associated with each mode is a series of unique displays which are accessed via the front
keypad.

Prior to first time operation of the unit, the configuration procedures for the Program, Preset
Adjust, Data logger Setup, and Alarm Set modes must be performed as applicable.

Calibration and Test modes are not used as part of the unit configuration or operation. These
are used for service and maintenance functions and are discussed in detail in Section 5.6 of
this manual (page 40).