AMALGAMATED INSTRUMENT RM4-RS User manual

Model RM4-RS
Serial Input
Arithmetic and Wind Speed/Direction
Addendum
AMALGAMATED INSTRUMENT CO ABN: 80 619 963 692
Unit 5, 28 Leighton Place Hornsby Telephone: [phone] e-mail: [email protected]
NSW 2077 Australia Facsimile: [phone] Internet: www.aicpl.com.au

Table of Contents
1 Introduction 3
2 Mechanical installation 4
3 Electrical installation 5
4 Function tables - Arithmetic mode 8
5 Function table - Wind Speed and Direction mode 14
6 Arithmetic and Wind Speed/Direction mode functions 17
7 Arithmetic function examples 49
8 Wind speed and direction NMEA mode 50
2 of 50 RM4RSADDMAN-1.3-0

1 Introduction
This addendum to the RM4-RS manual contains information for the installation and operation
using the arithmetic mode ARtH or the wind monitor mode NMEA. Refer to the main RM4-RS
and RM4-RSA manual for any details not covered in this addendum.
The RM4 will accept inputs from RS232, RS485, RS422 or serial current loop inputs (factory
configured). The two modes covered by this addendum are detailed below. If the mode is changed
it is necessary to remove power from the RM4 then reapply power in order to reset the mode.
Arithmetic mode. The instrument can be programmed to accept input from up to eight RS485
or RS422 sources and combine these arithmetically. The time between polling requests is pro-
grammable from 0.0 to 20.0 seconds. The instruments polled for arithmetic operation must be of
the same manufacture as the RM4 instrument. To operate in this mode the COdE function must
be set to ARth.
Wind speed and direction (NMEA). This mode is used only with instruments using NMEA
(National Marine Electronics Association) serial code such as a wind speed and direction sensor.
To operate in this mode the COdE function must be set to NMEA.
The display can be set to display wind speed, wind direction or to toggle (using ^or vbutton)
or automatically alternate the display between wind speed and direction. Analog retransmission
output options can be selected to transmit wind direction (Ch1) or wind speed (Ch2) at the REC
function (also at the REC2 function if dual analog output is used.) Similarly Ch1 or Ch2 can be
selected for the alarm relays at the A1,A2 etc. functions.
RM4RSADDMAN-1.3-0 3 of 50

2 Mechanical installation
The instrument is designed for DIN rail mounting. The instrument clips on to 35mm DIN standard
rails (EN50022). Cut the DIN rail to length and install where required. To install the instrument
simply clip onto the rail as shown below. To remove the instrument lever the lower arm downwards
using a broad bladed screwdriver to pull the clip away from the DIN rail.
44mm
91mm
141mm
4
3
2
I
Rail
4 of 50 RM4RSADDMAN-1.3-0

3 Electrical installation
The RM4 Meter is designed for continuous operation and no power switch is fitted to the unit. It
is recommended that an external switch and fuse be provided to allow the unit to be removed for
servicing. The terminal blocks allow for wires of up to 2.5mm2to be fitted for power supply and
relays 1 and 2 or 1.5mm2for input connections and optional outputs. Connect the wires to the
appropriate terminals as indicated below.
Refer to connection diagrams provided in this manual to confirm proper selection of voltage, polarity
and input type before applying power to the instrument. When power is applied the instrument
will cycle through a display sequence, indicating the software version and other status information,
this indicates that the instrument is functioning. Acknowledgement of correct operation may be
obtained by applying an appropriate input to the instrument and observing the resultant reading.
Note that the power supply type is factory configured. Check power supply type before connecting.
Relay outputs are voltage free contacts.
Electrical connections and data label (RS232 input 240VAC supply example)
RM4RSADDMAN-1.3-0 5 of 50

3.1 Power supply connections
AC supply connections use terminal G (Active), terminal F (Neutral) and terminal E (Case earth).
DC supply connections (12 to 48VDC) use terminal G (DC-), terminal F (DC+) and terminal E
(Case earth).
3.2 Serial input connections
Terminating resistors: If long cable runs are used in RS485 or RS422 installations reflections of
data signals along the line can in some situations cause corruption of the signal. Fitting a 150Ω
(nominal) resistor across the A and B terminals will help to absorb reflected signals and may fix
the problem.
6 of 50 RM4RSADDMAN-1.3-0

3.3 Remote input connections
The selected remote input function can be operated via an external contact closure via a switch,
relay or open collector transistor switch.
4
3
2
I
Remote
input
Choose momentary or
latching switch to
suit function selected.
3.4 Optional outputs
Refer to the separate “RM4 Din Rail Meter Optional Output Addendum” for connection details
of optional outputs fitted.
3.5 Configuring the input board
There are no user configurable links on the input circuit boards. Refer to the separate RM4 DIN
Rail Meter Optional Output Addendum booklet supplied if options are fitted.
RM4RSADDMAN-1.3-0 7 of 50

4 Function tables - Arithmetic mode
Note: the order in which the functions appear on the display may not be exactly as shown below.
The availability and order of functions is determined by choice of function settings and options
fitted.
Functions in this first table are available in FUNC or CAL mode.
Display Function Range Default Your
record
Ref/Page
AxLo Low setpoint value for
designated alarm relay x
Any display
value or OFF
OFF See
5.1
6.1 /19
AxHi High setpoint value for
designated alarm relay x
Any display
value or OFF
OFF See
5.1
6.2 /19
AxHY Hysteresis value for the
designated alarm relay x.
0to 9999 10 See
5.1
6.3 /20
Axtt Trip time delay for the
designated alarm relay x.
0to 9999 0 See
5.1
6.4 /20
Axrt Reset time delay for the
designated alarm relay x.
0to 9999 0 See
5.1
6.5 /21
Axn.o
or
Axn.c
Alarm relay xaction to
normally open (de-energised) or
normally closed (energised)
Axn.o or
Axn.c
Axn.o See
5.1
6.6 /21
AxSP
or
Axt1
etc.
Relay operation independent
setpoint or trailing setpoint
(∗Optional)
AxSP or
Axt1 etc.
AxSP See
5.1
6.7 /21
brGt Display brightness level 1to 15 15 6.8 /22
duLL Display remote brightness
switching
0to 15 1 6.9 /22
(∗Optional)—this function will only be accessible if the relevant option is fitted
Functions in this second table are available only in CAL mode or if ACCS is set to ALL
Display Function Range Default Your
record
Ref/Page
d.oFF
SECS
Auto display dimming timer 0to 9999 0 6.10 /23
REC_ Analog output option low
display value (∗Optional)
Any display
value
06.11 /23
REC~ Analog output option high
display value (∗Optional)
Any display
value
1000 6.12 /23
rEC Analog output 1 channel
(∗Optional)
ch0 to ch8 ch0 6.13 /24
REC_
Ch2
Second analog output option
low display value (∗Optional)
Any display
value
06.14 /24
(∗Optional)—this function will only be accessible if the relevant option is fitted
8 of 50 RM4RSADDMAN-1.3-0

REC~
Ch2
Second analog output option
high display value (∗Optional)
Any display
value
1000 6.15 /24
rEC2 Analog output 2 channel
(∗Optional)
ch0 to ch8 ch0 6.16 /24
drnd Display rounding 1to 5000 1 6.17 /24
dCPt Decimal point 0,0.1 etc. 06.18 /25
FLtr Digital filter 0to 8 2 6.19 /25
AthH
CH
Number of active channels for
Arth mode
1to 8 4 6.38 /33
Ch1
Addr
Channel 1 address P1 to P8 or
S1 to S8 or
t1 to t8
P1 6.39 /33
Ch2
Addr
Channel 2 address P1 to P8 or
S1 to S8 or
t1 to t8
P1 6.40 /33
Ch3
Addr
Channel 3 address P1 to P8 or
S1 to S8 or
t1 to t8
P1 6.41 /33
Ch4
Addr
Channel 4 address P1 to P8 or
S1 to S8 or
t1 to t8
P1 6.42 /34
Ch5
Addr
Channel 5 address P1 to P8 or
S1 to S8 or
t1 to t8
P1 6.43 /34
Ch6
Addr
Channel 6 address P1 to P8 or
S1 to S8 or
t1 to t8
P1 6.44 /34
Ch7
Addr
Channel 7 address P1 to P8 or
S1 to S8 or
t1 to t8
P1 6.45 /34
Ch8
Addr
Channel 8 address P1 to P8 or
S1 to S8 or
t1 to t8
P1 6.46 /34
Ch1
dCPt
Channel 1 decimal point 0,0.1 etc. 06.47 /35
Ch2
dCPt
Channel 2 decimal point 0,0.1 etc. 06.48 /35
Ch3
dCPt
Channel 3 decimal point 0,0.1 etc. 06.49 /35
Ch4
dCPt
Channel 4 decimal point 0,0.1 etc. 06.50 /35
Ch5
dCPt
Channel 5 decimal point 0,0.1 etc. 06.51 /35
(∗Optional)—this function will only be accessible if the relevant option is fitted
RM4RSADDMAN-1.3-0 9 of 50

Ch6
dCPt
Channel 6 decimal point 0,0.1 etc. 06.52 /36
Ch7
dCPt
Channel 7 decimal point 0,0.1 etc. 06.53 /36
Ch8
dCPt
Channel 8 decimal point 0,0.1 etc. 06.54 /36
EA1 EA1 value for arithmetic
formula
-19999 to
32767
16.55 /36
Eb1 Eb1 value for arithmetic
formula
-19999 to
32767
06.56 /37
EC2 EC2 value for arithmetic
formula
-19999 to
32767
16.60 /38
EA2 EA2 value for arithmetic
formula
-19999 to
32767
16.58 /37
Eb2 Eb2 value for arithmetic
formula
-19999 to
32767
06.59 /37
EC2 EC2 value for arithmetic
formula
-19999 to
32767
16.60 /38
EA3 EA3 value for arithmetic
formula
-19999 to
32767
16.61 /38
Eb3 Eb3 value for arithmetic
formula
-19999 to
32767
06.62 /38
EC3 EC3 value for arithmetic
formula
-19999 to
32767
16.63 /38
EA4 EA4 value for arithmetic
formula
-19999 to
32767
16.64 /38
Eb4 Eb4 value for arithmetic
formula
-19999 to
32767
06.65 /39
EC4 EC4 value for arithmetic
formula
-19999 to
32767
16.66 /39
EA5 EA5 value for arithmetic
formula
-19999 to
32767
16.67 /39
Eb5 Eb5 value for arithmetic
formula
-19999 to
32767
06.68 /39
EC5 EC5 value for arithmetic
formula
-19999 to
32767
16.69 /39
EA6 EA6 value for arithmetic
formula
-19999 to
32767
16.70 /40
Eb6 Eb6 value for arithmetic
formula
-19999 to
32767
06.71 /40
EC6 EC6 value for arithmetic
formula
-19999 to
32767
16.72 /40
(∗Optional)—this function will only be accessible if the relevant option is fitted
10 of 50 RM4RSADDMAN-1.3-0

EA7 EA7 value for arithmetic
formula
-19999 to
32767
16.73 /40
Eb7 Eb7 value for arithmetic
formula
-19999 to
32767
06.74 /40
EC7 EC7 value for arithmetic
formula
-19999 to
32767
16.75 /41
EA8 EA8 value for arithmetic
formula
-19999 to
32767
16.76 /41
Eb8 Eb8 value for arithmetic
formula
-19999 to
32767
06.77 /41
EC8 EC8 value for arithmetic
formula
-19999 to
32767
16.78 /41
OP1 Arithmetic operation between
channels 1 and 2
Add,Sub,
Prod,diU,
High,Lo,
SINE,COS
or C.SUb
Add 6.79 /41
OP2 Arithmetic operation between
channel 3 and previous
operation
Add,Sub,
Prod,diU,
High,Lo,
SINE or COS
Add 6.80 /42
OP3 Arithmetic operation between
channel 4 and previous
operation
Add,Sub,
Prod,diU,
High,Lo,
SINE or COS
Add 6.81 /42
OP4 Arithmetic operation between
channel 5 and previous
operation
Add,Sub,
Prod,diU,
High,Lo,
SINE or COS
Add 6.82 /43
OP5 Arithmetic operation between
channel 6 and previous
operation
Add,Sub,
Prod,diU,
High,Lo,
SINE or COS
Add 6.83 /43
OP6 Arithmetic operation between
channel 7 and previous
operation
Add,Sub,
Prod,diU,
High,Lo,
SINE or COS
Add 6.84 /44
OP7 Arithmetic operation between
channel 8 and previous
operation
Add,Sub,
Prod,diU,
High,Lo,
SINE or COS
Add 6.85 /45
Ch1 Channel 1 polarity both,POS
or NEG
both 6.86 /45
Ch2 Channel 2 polarity both,POS
or NEG
both 6.87 /45
(∗Optional)—this function will only be accessible if the relevant option is fitted
RM4RSADDMAN-1.3-0 11 of 50

Ch3 Channel 3 polarity both,POS
or NEG
both 6.88 /46
Ch4 Channel 4 polarity both,POS
or NEG
both 6.89 /46
Ch5 Channel 5 polarity both,POS
or NEG
both 6.90 /46
Ch6 Channel 6 polarity both,POS
or NEG
both 6.91 /46
Ch7 Channel 7 polarity both,POS
or NEG
both 6.92 /46
Ch8 Channel 8 polarity both,POS
or NEG
both 6.93 /47
bAUd
RAtE
Baud rate for serial
communications
300, 600,
1200, 2400,
4800, 9600,
19.2 or 38.4
9600 6.23 /26
PrtY Parity for serial input NONE, EUEN
or Odd
NONE 6.24 /26
dAtA Data type 8.bit or
7.bit
8.bit 6.25 /27
INPt Input type R232,R422,
R485 or I20
R232 6.26 /27
CodE Data type for display dISP,ASCI,
UAL,ARtH,
M.buS,
SCAN,NMEA
or CS
dISP 6.27 /27
A1
OPER
Alarm relay 1 operation mode INPt,t.out
or both
INPt 6.28 /29
A2
OPER
Alarm relay 2 operation mode INPt,t.out
or both
INPt 6.29 /29
dS.to Display timeout 0to 9999 10 6.30 /29
t.out Data string timeout 0.0 to 10.0 1.0 6.31 /30
P.but Pbutton function NONE, Hi,
Lo, HILo,
tARE or
ZERO
NONE 6.32 /30
R.INP Remote input (external input)
one function
NONE,
P.HLd,
d.HLd, Hi,
Lo , HiLo,
tARE, ZERO,
SP.Ac, No.Ac
or duLL
NONE 6.33 /30
(∗Optional)—this function will only be accessible if the relevant option is fitted
12 of 50 RM4RSADDMAN-1.3-0

ACCS Access mode OFF, EASY,
NONE or ALL
OFF 6.34 /32
SPAC Setpoint access mode
(∗Optional)
A1, A1-2 etc. A1 6.35 /32
A1 Alarm relay 1 operation channel ch0 to ch8 ch0 6.36 /32
A2 to
A4
Alarm relay 2 to 4 operation
channel
ch0 to ch8 ch0 6.37 /32
CLr
ZERO
Clear zero n/a n/a 6.94 /47
R.trn
bAUd
Baud rate for serial
retransmission (∗Optional)
300,600,
1200,2400,
4800,9600,
19.2 or 38.4
9600 6.95 /47
R.trn
PrtY
Parity for serial retransmission
(∗Optional)
NONE,EUEN
or Odd
NONE 6.96 /47
R.trn
O.Put
Output mode for serial
retransmission (∗Optional)
NONE,dISP,
Cont,POLL,
Cont,M.buS
or A.buS
NONE 6.97 /47
R.trn
Addr
Address for serial retransmission
(∗Optional)
0to 31 0 6.98 /48
(∗Optional)—this function will only be accessible if the relevant option is fitted
4.1 Relay table
Record your relay settings in the table below. Note: relays 3 and 4 are optionally fitted.
Display Relay 1 Relay 2 Relay 3 Relay 4
AxLo
AxHi
AxHY
Axtt
Axrt
Axn.o or Axn.c
AxSP or Axt1 etc. n/a
A1 OPER n/a n/a n/a
A2 OPER n/a n/a n/a
A1 n/a n/a n/a
A2 n/a n/a n/a
A3 n/a n/a n/a
A4 n/a n/a n/a
RM4RSADDMAN-1.3-0 13 of 50

5 Function table - Wind Speed and Direction mode
Note: the order in which the functions appear on the display may not be exactly as shown below.
The availability and order of functions is determined by choice of function settings and options
fitted.
Functions in this first table are available in FUNC or CAL mode
Display Function Range Default Your
record
Ref/Page
AxLo Low setpoint value for
designated alarm relay x
Any display
value or OFF
OFF See
5.1
6.1 /19
AxHi High setpoint value for
designated alarm relay x
Any display
value or OFF
OFF See
5.1
6.2 /19
AxHY Hysteresis value for the
designated alarm relay x.
0to 9999 10 See
5.1
6.3 /20
Axtt Trip time delay for the
designated alarm relay x.
0to 9999 0 See
5.1
6.4 /20
Axrt Reset time delay for the
designated alarm relay x.
0to 9999 0 See
5.1
6.5 /21
Axn.o
or
Axn.c
Alarm relay xaction to
normally open (de-energised) or
normally closed (energised)
Axn.o or
Axn.c
Axn.o See
5.1
6.6 /21
AxSP
or
Axt1
etc.
Relay operation independent
setpoint or trailing setpoint
(∗Optional)
AxSP or
Axt1 etc.
AxSP See
5.1
6.7 /21
brGt Display brightness level 1to 15 15 6.8 /22
duLL Display remote brightness
switching
0to 15 1 6.9 /22
(∗Optional)—this function will only be accessible if the relevant option is fitted
Functions in this second table are available only in CAL mode or if ACCS is set to ALL
Display Function Range Default Your
record
Ref/Page
d.oFF
SECS
Auto display dimming timer 0to 9999 0 6.10 /23
REC_ Analog output option low
display value (∗Optional)
Any display
value
06.11 /23
REC~ Analog output option high
display value (∗Optional)
Any display
value
1000 6.12 /23
rEC Analog output 1 channel
(∗Optional)
ch0 to ch8 ch0 6.13 /24
REC_
Ch2
Second analog output option
low display value (∗Optional)
Any display
value
06.14 /24
(∗Optional)—this function will only be accessible if the relevant option is fitted
14 of 50 RM4RSADDMAN-1.3-0

REC~
Ch2
Second analog output option
high display value (∗Optional)
Any display
value
1000 6.15 /24
rEC2 Analog output 2 channel
(∗Optional)
ch0 to ch8 ch0 6.16 /24
SPEd
Unit
Units to be used for NMEA
mode
MS,MPH,
hPH or hnot
MS 6.20 /25
dFLt
dISP
Default display for NMEA mode dir,SPEd
or SCAN
SCAN 6.21 /26
SCAN
SECS
Number of seconds between
scans
0to 255 0 6.22 /26
bAUd
RAtE
Baud rate for serial
communications
300, 600,
1200, 2400,
4800, 9600,
19.2 or 38.4
9600 6.23 /26
PrtY Parity for serial input NONE, EUEN
or Odd
NONE 6.24 /26
dAtA Data type 8.bit or
7.bit
8.bit 6.25 /27
INPt Input type R232,R422,
R485 or I20
R232 6.26 /27
CodE Data type for display dISP,ASCI,
UAL,ARtH,
M.buS,
SCAN,NMEA
or CS
dISP 6.27 /27
A1
OPER
Alarm relay 1 operation mode INPt,t.out
or both
INPt 6.28 /29
A2
OPER
Alarm relay 2 operation mode INPt,t.out
or both
INPt 6.29 /29
dS.to Display timeout 0to 9999 10 6.30 /29
t.out Data string timeout 0.0 to 10.0 1.0 6.31 /30
P.but Pbutton function NONE, Hi,
Lo, HILo,
tARE or
ZERO
NONE 6.32 /30
R.INP Remote input (external input)
one function
NONE,
P.HLd,
d.HLd, Hi,
Lo , HiLo,
tARE, ZERO,
SP.Ac, No.Ac
or duLL
NONE 6.33 /30
ACCS Access mode OFF, EASY,
NONE or ALL
OFF 6.34 /32
(∗Optional)—this function will only be accessible if the relevant option is fitted
RM4RSADDMAN-1.3-0 15 of 50

SPAC Setpoint access mode
(∗Optional)
A1, A1-2 etc. A1 6.35 /32
A1 Alarm relay 1 operation channel ch0 to ch8 ch0 6.36 /32
A2 to
A4
Alarm relay 2 to 4 operation
channel
ch0 to ch8 ch0 6.37 /32
R.trn
bAUd
Baud rate for serial
retransmission (∗Optional)
300,600,
1200,2400,
4800,9600,
19.2 or 38.4
9600 6.95 /47
R.trn
PrtY
Parity for serial retransmission
(∗Optional)
NONE,EUEN
or Odd
NONE 6.96 /47
R.trn
O.Put
Output mode for serial
retransmission (∗Optional)
NONE,dISP,
Cont,POLL,
Cont,M.buS
or A.buS
NONE 6.97 /47
R.trn
Addr
Address for serial retransmission
(∗Optional)
0to 31 0 6.98 /48 Z
(∗Optional)—this function will only be accessible if the relevant option is fitted
5.1 Relay table
Record your relay settings in the table below. Note: relays 3 and 4 are optionally fitted.
Display Relay 1 Relay 2 Relay 3 Relay 4
AxLo
AxHi
AxHY
Axtt
Axrt
Axn.o or Axn.c
AxSP or Axt1 etc. n/a
A1 OPER n/a n/a n/a
A2 OPER n/a n/a n/a
A1 n/a n/a n/a
A2 n/a n/a n/a
A3 n/a n/a n/a
A4 n/a n/a n/a
16 of 50 RM4RSADDMAN-1.3-0

6 Arithmetic and Wind Speed/Direction mode functions
Some of the functions described in this chapter are common to both ARtH and NMEA modes,
others will only appear in one mode, check the function tables for each mode to confirm which
functions apply. The RM4 setup and calibration functions are configured through a push button
sequence. The push buttons located at the front of the instrument are used to alter settings. Two
basic access modes are available:
FUNC mode (simple push button sequence) allows access to commonly set up functions such as
alarm setpoints.
CAL mode (power up sequence plus push button sequence) allows access to all functions including
calibration parameters.
Once CAL or FUNC mode has been entered you can step through the functions, by pressing and
releasing the Fpush button, until the required function is reached. Changes to functions are made
by pressing the or push button (in some cases both simultaneously) when the required function is
reached. See the flow chart example on the following page.
P
P
F
F
P F
P PF F
Entering ModeCAL Entering ModeFUNC
1. Remove power from
the instrument. Hold in the
button and reapply power.
The display will indicate
as part of the
"wake up messages" when
the message is seen
you can release the
button.
2. When the "wake up"
messages have finished
and the display has settled
down to its normal reading
press, then release the
button.
1. When the "wake up"
messages have finished
and the display has settled
down to its normal reading
press, then release the
button.
3. Within 2 seconds of
releasing the button
press, then release
the and buttons
together. The display will
now indicate followed
by the first function.
2. Within 2 seconds of
releasing the button
press, then release
the and buttons
together. The display will
now indicate followed
by the first function.
^
^
^^
FUNC
FUNC
F
F
F
FF
CAL
CAL
Note: If step 1 above has been completed then the
instrument will remain in this mode state until
power is removed. i.e. there is no need to repeat step 1
when accessing function unless power has been removed.
CAL
No special power up procedure
is required to enter mode.FUNC
RM4RSADDMAN-1.3-0 17 of 50

Example: Entering FUNC mode to change alarm 1 high function A1Hi from OFF to 100
F U N C
F U N C End
A1Hi OFF
100
Press & release
Press & release Press & release
Press & release
Press & release F
^until
FP For until
Funtil
then press ^v
Example: Entering CAL mode to change decimal point function dCPt from 0to 0.02
F U N C
F U N C End
dCPt
CAL
0
.0 0 2
Press & release
Press & release Press & release
Press & release
Press & hold Release
Hold
Press & release F
^until
FP For until
Funtil
FF
Funtil
then press ^v
Switch off
instrument
Switch on
instrument
Easy alarm relay adjustment access facility
The display has an easy alarm access facility which allows access to the alarm setpoints simply
by pressing the Fbutton at the front of the instrument. The first setpoint will then appear
and changes to this setpoint may be made to this setpoint via the ^or vbuttons. Press the
Fbutton to accept any changes or to move on to the next setpoint. Note: this easy access also
functions in the same manner for the PI control setpoint (relay and/or analog PI output) if PI
control is available. The instrument must be set in the manner described below to allow the easy
access facility to work:
1. The R.INP function must be set to SPAC or the ACCS function must be set to EASY.
2. At least one alarm must have a setpoint, nothing will happen if all the alarm setpoints are
set to OFF.
3. The SPAC function must be set to allow access to the relays required e.g. if set to A1-2
then the easy access will work only with alarm relays 1 and 2 even if more relays are fitted.
4. The instrument must be in normal measure mode i.e. if the instrument is powered up so that
it is in CAL mode then the easy access will not function. If in doubt remove power from the
instrument, wait for a few seconds then apply power again.
5. If the easy access facility is used then the only way to view or alter any other function
settings is to power up via CAL mode i.e. there is no entry to FUNC mode functions unless
the instrument is powered up in CAL mode.
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6.1 Alarm relay low setpoint
Display: AxLo
Range: Any display value or OFF
Default Value: OFF
Displays and sets the low setpoint value for the designated alarm relay x. Note xwill be replaced
by the relay number when displayed e.g. A1Lo for relay 1. Use this low setpoint function if a
relay operation is required when the display value becomes equal to or less than the low setpoint
value. To set a low alarm value go to the AxLo function and use the ^or vpush buttons to set
the value required then press Fto accept this value. The low alarm setpoint may be disabled by
pressing the ^and vpush buttons simultaneously. When the alarm is disabled the display will
indicate OFF. If the relay is allocated both a low and high setpoint then the relay will activate
when the value displayed moves outside the band set by the low and high setpoints. The value at
which the relay will reset is controlled by the AxHY function.
Example:
If A1Lo is set to 10 then relay 1 will activate when the display value is 10 or less.
Display Value
Time
A Lox
A HYxvalue
A Lo
A HY
x
x
plus
Relay
activates
at this value
or below
Relay
resets
above this
value
Alarm low operation with hysteresis
6.2 Alarm relay high setpoint
Display: AxHi
Range: Any display value or OFF
Default Value: OFF
Displays and sets the high setpoint value for the designated alarm relay x. Note xwill be replaced
by the relay number when displayed e.g. A1Hi for relay 1. Use this high setpoint function if a
relay operation is required when the display value becomes equal to or more than the low setpoint
value. To set a high alarm value go to the AxHi function and use the ^or vpush buttons to
set the value required then press Fto accept this value. The high alarm setpoint may be disabled
by pressing the ^and vpush buttons simultaneously. When the alarm is disabled the display
will indicate OFF. If the relay is allocated both a low and high setpoint then the relay will activate
when the value displayed moves outside the band set by the low and high setpoints. The value at
which the relay will reset is controlled by the AxHY function.
Example:
If A1Hi is set to 100 then relay 1 will activate when the display value is 100 or higher.
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Display Value
Time
A Hix
A Hi
A HY
x
x
minus Relay
activates
at this value
or above Relay
resets
below this
value
A HYxvalue
Alarm high operation with hysteresis
6.3 Alarm relay hysteresis (deadband)
Display: AxHY
Range: 0to 9999
Default Value: 10
Displays and sets the alarm relay hysteresis limit for the designated relay x. Note xwill be replaced
by the relay number when displayed e.g. A1HY for relay 1. To set a relay hysteresis value go to the
AxHY function and use the ^or vpush buttons to set the value required then press Fto accept
this value. The hysteresis value is common to both high and low setpoint values. The hysteresis
value may be used to prevent too frequent operation of the relay when the measured value is rising
and falling around setpoint value. e.g. if A1HY is set to zero the alarm will activate when the
display value reaches the alarm setpoint (for high alarm) and will reset when the display value falls
below the setpoint, this can result in repeated on/off switching of the relay at around the setpoint
value.
The hysteresis setting operates as follows: In the high alarm mode, once the alarm is activated
the input must fall below the setpoint value minus the hysteresis value to reset the alarm. e.g. if
A1Hi is set to 50.0 and A1Hy is set to 3.0 then the setpoint output relay will activate once the
display value goes to 50.0 or above and will reset when the display value goes below 47.0 i.e. at
46.9 or below. In the low alarm mode, once the alarm is activated the input must rise above the
setpoint value plus the hysteresis value to reset the alarm. e.g. if A1Lo is to 20.0 and A1Hy
is set to 10.0 then the alarm output relay will activate when the display value falls to 20.0 or
below and will reset when the display value goes above 30.0 i.e at 30.1 or above. The hysteresis
units are expressed in displayed engineering units.
Example: If A1Hi is set to 100 and A1HY is set to 10 then relay 1 will activate when the
display value is 100 or higher and will reset at a display value of 89 or lower.
6.4 Alarm relay trip time
Display: Axtt
Range: 0to 9999
Default Value: 0
Displays and sets the alarm trip time in seconds. The trip time is common for both alarm high and
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