Dynisco 1290 Installation And Operation Manual

Model 1290 Strain Gage Input Indicator

Installation and Operation Manual

P/N 974066
02/03 Rev. G
ECO # 27622

CONTENTS

Quick Start Instructions ................................................................................................................... 3

1. Indicator Description ................................................................................................................ 5

2. Specifications ........................................................................................................................... 6

3. Installation ................................................................................................................................ 9

4. Setup ...................................................................................................................................... 11

5. Operating Mode ..................................................................................................................... 21

6. Default Data Loading Procedure ............................................................................................. 23

7. Error Messages ........................................................................................................................ 25

8. Repair ..................................................................................................................................... 27

9. Warranty ................................................................................................................................ 27

1290 Strain Gage Input Indicator 3

MODEL 1290 QUICK START INSTRUCTIONS

4 STEPS TO GET UP AND RUNNING.

1. MOUNTING

• Prepare panel cutout to dimensions shown here.

• Remove instrument from case with front panel screw.

• Slide rubber gasket over case.

• Slide case through cutout and slide mounting frame over case rear, engaging the detents in the
case. Use a screwdriver to snug the mounting frame to the panel.

2. WIRING

• Connect wires from cable to terminals as indicated in diagram

• Connect AC power as indicated in diagram.

• If applicable, connect alarm(s). Note that alarm defaults are High, Reverse Acting.

4

3. SCALING

• Insert instrument in case and tighten screw.

• Display will indicate 1290 then CONF.

• Push F key three times. Display will read F.S.U. (Full Scale Value).

• Using the Down arrow key, select the value that matches the full scale of the transducer. Enter
with F key. (If your transducer is 10,000 PSI, no adjustment is necessary.)

• Remove instrument from case and close mode selection switch as shown.

• Reinsert instrument into case and tighten screw.

4. CALIBRATION AND OPERATION

•When power is applied, display will read 1290 then a Pressure reading. At this point, be sure
that no pressure is applied and that the transducer is at operating temperature.

• Press the F key and the legend LO. OFF appears. Using the Up arrow key, advance the legend to
LO.ON.

• Press the F key to initiate zero calibration. After approximately 5 seconds, the legend F.U.S.C.
will appear and alternate with the full-scale value.

• Press the Up arrow key to advance to the legend FU ON. using the F key, initiate the full-scale

calibration. After 5 seconds, the indicator will read 0 ±10.

•The system is now ready for use.

1290 Strain Gage Input Indicator 5

1. INDICATOR DESCRIPTION

The Dynisco Model 1290 Strain Gauge Input Indicator is a flexible, programmable indicator
designed for 350 ohm strain gauge based sensors, such as pressure transducers and load cells. The
five digit, 0.52” LED display provides a precise, readable indication of the measured value.

You can program the 1290 to display in engineering units up to a full scale value (fsv) of 99,900

with an accuracy of ± 0.1%. The span value, alarm set points and other constants are stored

indefinitely in non-volatile memory. Easy-to-remember pushbutton sequences simplify transducer
calibration routines.

Two independent SPST alarm relays are another available feature of the 1290. The dual high or low
set points are easily programmed from the front keyboard and are displayed on the digital display.
The low alarms can be set up as low-alarm-masked to inhibit alarm action during startup. Relay
contacts are provided to activate an annunciator or to initiate automatic shutdown if operating
conditions exceed preset limits.

A programmable voltage or current retransmission output is available as an option. You can select a
voltage output of 0-10 VDC or current outputs of 4-20 mA or 0-20 mA to drive chart recorders or
data acquisition equipment

The Model 1290 can also be supplied with bidirectional and half duplex RS-485 serial
communications. All signals are optically isolated and the baud rate is adjustable between 150
19200 baud. The serial communications and analog retransmission output options are mutually
exclusive.

Other features of the 1290 are:

•A peak reading display (high and low) selected from the front panel

•A digital filter to reduce the effects of input variations on the display, analog output and alarms

• Input interruption sensing to detect when a transducer or any one of its leads has been
disconnected

•A program lockout feature that disables the front keyboard to prevent un authorized or
accidental changes

• An input signal that can be configured for either resetting the alarms or triggering hold-on-value

•A digital display that provides operator prompts with messages to show current status or errors

•A compact, 48mm by 96mm (1.89in. x 3.78 in.), 1/8 DIN enclosure that projects only 144mm
(5.67 in.) behind the panel

6

2. SPECIFICATIONS

2.1 GENERAL

Case PC/ABS, Black

Self-extinguishing, level V-0, per UL 94

Dimensions 48 mm high x 96 mm wide x 144 mm deep

(1.89 in. high x 3.78 in. wide x 5.67 in. deep)
1/8 DIN per DIN 43700

Installation Panel mounted, secured by mounting frame

Cut-out 45 mm high x 92 mm wide, +0.8 mm/-0 mm

(1.77 in. high x 3.62 in. wide, +0.03 in./-0 in.)

Front panel IP 65 protection per IEC 569/CEI 70-1

Rear terminal block 22 screw terminals with safety cover

Display 5 red LED digits, 13.2 mm high

7 segments plus decimal point

Indicators 2 red LEDs for alarm annunciator function

1 red LED for local/remote control

Keyboard Four pushbuttons

Sampling time 100 ms typical

Display update time 400 ms

Common mode rejection ratio 120 dB @ 50/60 Hz

Accuracy ± 0.1% fsv ±1 digit @ 25°C
Temperature drift Less than 200ppm/°C of fsv

Insulation resistance Greater than 100 Mohm, per IEC 348

Dielectric strength 1500 V rms, per IEC 348

Power supply Switching 85/264 VAC, 50/60 Hz

(24 VDC ± 10% factory order option)

1290 Strain Gage Input Indicator 7

Power consumption 100 mA @ 110 VAC maximum

Protection Internal thermistor

Normal mode 60 dB @ 50/60 Hz

Weight 600g

Operating temperature 0 to 50°C
Storage temperature -20 to +70°C

Humidity 85% relative humidity, non-condensing

2.2 STRAIN GAUGE INPUT

Input 350 ohm bridge

Bridge excitation 10 V +7%

Bridge sensitivity 2 to 4 mV/V

Input signal -25% + 125% of full scale (approx -10 + 50 mV)

Calibration With or without shunt resistor

Shunt value From 40.0% to 100.0%

Zero balance ± 25% of fsv
Tare ± 25% of fsv

Readout Keyboard programmable from 10 to 99900

Input resolution Adjustable by 1 up to 2010

Adjustable by 10 from 2010 to 20100
Adjustable by 100 from 20100 to 99900
Decimal point may be set in any position

Open input detection On any one of the 4 transducer leads, selectable up or down scale

fault mode.

8

2.3 SPECIAL FEATURES

Display filter First order digital filter on displayed value, with configurable time

constant of 0.4, 1, 2, 3, 4 or 5 seconds

Peak detection Automatic detection of maximum and minimum measured value

Input logic Driven by dry contacts for manual alarm reset or for hold-on value

Watch dog Hardware and software for automatic restart

Protection Internal jumper for calibration and configuration

Parameter protection
Keyboard lockout

2.4 ALARMS

Quantity Two independent alarms

Threshold 0% to 100% of readout span

Resolution and decimal point position as selected per readout
value

Hysteresis Programmable, 0.1% to 9.9% of readout span

Type of alarms High or low thresholds

Direct or reverse (failsafe) action
Automatic or manual reset
Optional low alarm startup masking

Alarm output Two contacts, SPST, NO or NC, jumper selectable

Update time 100 ms

Contact rating 0.6A at 110 Vac resistive load; 0.5A at 220 Vac resistive load; 0.3A

at 110 Vdc inductive load

Filter Optional digital filter with the same time constant chosen for

display filter

2.5 SERIAL COMMUNICATION INTERFACE (OPTION)

Type RS-485, opto-isolated from instrument input and output

Protocol Polling/Selecting, modbUS, jbUS

1290 Strain Gage Input Indicator 9

Baud rate From 150 to 19200 baud

Format 7 bits + parity

8 bits + parity
8 bits without parity

Parity Even/Odd

Stop bit One

2.6 ANALOG RETRANSMISSION (OPTION)

Output types 0-20 mA, 4-20 mA, maximum load, 500 ohms

0-10 V, minimum load 5000 ohms
Keyboard and jumper selectable
Opto-isolated

Scaling From 0 to 99900

Resolution and decimal point position are as selected per readout
value

Output resolution Better than 0.05% of output span (scaling can worsen output

resolution)

Filter It is possible to enable a digital filter on the output with the same

time constant selected for the display filter

Accuracy 0.2% of output span

Temperature drift Less than 100ppm/°C (plus input drift)

Output noise Less than 0.1% fsv RMS

Update time 100 ms

NOTE: The analog retransmission and serial communication interfaces are mutually exclusive.

3. INSTALLATION

3.1 UNPACKING

Inspect the package for shipping damage. If you notice any damage, notify the freight carrier
immediately.

10

3.2 MOUNTING

Fig. 1 Panel Cutout

•Make the instrument panel cut-out with the specified cut-out dimensions.

• Undo the screw (2).

• Remove the unit from the instrument case (3).

• Slide the gasket onto the instrument case (3).

• Slide the the instrument case (3) through the cut-out.

• Slide the mounting frame (4) from the rear over the instrument case (3) so that the snap-in
elements of the mounting frame (4) engage in the recesses at the side.

• Use a screwdriver to snug the mounting frame (4) and the instrument case (3).

• Slide the instrument from the front into the instrument case (3).

• Secure the instrument in the case with the screw (2).

Fig. 2 Side View, Mounting

1290 Strain Gage Input Indicator 11

4. SETUP

4.1 FRONT PANEL

The front of the Model 1290 is shown in Figure 3. Key items on the front panel are:

•A five digit LED display

• LED indicators AL1 (Alarm 1) and AL2 (Alarm 2)

• LED indicator RS (Remote Status)

•Four pushbuttons protected by silicone rubber, labeled R, ▼, ▲, F. The pushbutton functions are

listed in the table below.

Fig. 3 Front Panel

4.2 PUSHBUTTON FUNCTIONS

Button Sequence Resulting Operation

▼ Used to step between choices or to decrement a parameter value
▲ Used to step between choices, increment a parameter value or to

display peak high or peak low

F Used to store currently displayed parameter value,

as modified, and to display the next parameter

R Used to scroll back to the previous parameter without storing the

modified parameter value

R + ▼ or Alarm manual reset (either button sequence will
R + ▲ reset both alarms)

R + F Reset peak high and peak low values

▼ + ▲ Initiate default data loading procedure
▼ + R + F Used to lock or unlock keyboard for transducer calibration

and parameter modification

12

To perform operations requiring two or more pushbuttons, press and hold the first pushbutton then
press and hold the second pushbutton, and then press the third pushbutton, if required.

NOTE: You must follow the pushbutton sequences exactly as described.

4.3 REAR TERMINAL CONNECTIONS

The electrical connections for the Model 1290 are shown in the table below. The layout of the
terminals, as seen from the rear, is shown in Figure 4.

Terminal Connection Dynisco Wire Terminal Connection

1 Signal + Red 12 Alarm 2

(no terminal) 13 Alarm 2C
3 Signal — Black 14 Alarm 1
4+ Excitation White 15 Alarm 1C
5— Excitation/ CAL1 Green + Blue 16 N/C
6CAL 2 Orange 17 N/C
7 Logic Input 18 Remote Enable
8 Logic Input 19 Remote Enable
9 Line (Hot side) VAC, or +24 VDC 20 A/A’
10 Line (Neutral), or 0 VDC 21 Output V/mA+ B/B’
11 Ground 22 Output V/mA- C/C’

NOTE: Do not connect any wires to terminals 16 and 17.

Fig. 4 Rear Terminal Locations

4.4 INPUT WIRING

Connect the pressure transducer per the instructions detailed below. Do not run input wires in the

1290 Strain Gage Input Indicator 13

same bundle with power cables; instead, shielded cable should be used and grounded at the
transducer end only (Dynisco’s cable assembly provides this grounding).

Dynisco Standard Wire Code Transducer Pin-Out

Lead Color PT420 Series PT460 Series
Excitation + White A C
Signal + Red B A
Excitation - Green C D
Signal - Black D B
Calibration Blue E E
Calibration Orange F F

G (unused)
H (unused)

4.5 INTERNAL SETTINGS

The indicator consists of an upper and a lower printed circuit board and a front panel. These are
connected by ribbon cables which are soldered in place.

CAUTION: Be careful not to twist the ribbon cables during assembly and disassembly.

4.5.1 DISASSEMBLY

1. With a small slotted screwdriver, loosen the captive screw on the right side of the front panel.

2. Slide out the front panel and printed circuit board assembly, and place it on a flat, anti-static
work surface. Notice that the circuit boards are held in place by four plastic clips. See Figure 5.

14

Fig. 5 Front Panel and Circuit Board Assembly

4.5.2 OUTPUT JUMPER SETTINGS

Output options are selected by the placement of jumpers on the upper circuit board. The choices
available are:

•Voltage or current loop output for analog retransmission. Jumper setups are shown in Figure 6.
The default selection is a 4-20 mA current output, with alarm outputs normally closed.

•The alarm jumpers (normally open or normally closed) are shown in Figure 6 and described in
the table on the next page. Each alarm is configured independently.

CAUTION: Wear an anti-static wristband and work on an anti-static surface when setting jumpers.

Fig. 6 Upper Circuit Board and Jumper Settings

1290 Strain Gage Input Indicator 15

The table below describes the alarm contact status based on the alarm jumper settings as selected
from Figure 6 and the state of the Alarm Action settings as described in G1 and H on page 18.

Alarm Action Alarm Jumper Contact Status

Reverse (fail safe) 1-2 (NO) Contacts open in alarm or power loss
Direct 1-2 (NO) Contacts closed in alarm
Reverse (fail safe) 2-3 (NC) Contacts closed in alarm or power loss
Direct 2-3 (NC) Contacts open in alarm

4.5.3 MODE SELECTION

The Mode Selection Switch determines whether the indicator will be in configuration/calibration
mode or the normal operating mode.

NOTE: The Configuration/Calibration Mode is only used when the indicator is first installed, or

when reconfiguration of the indicator is required. At all other times, the operating mode is
used.

Fig. 7 Model 1290 Side View, Mode Selection Switch

To access the Mode Selection Switch slide out the front panel and printed circuit board assembly, as
instructed by steps 1 and 2 of Disassembly on page 13. Then, refer to Figure 7 to locate the switch
and change the setting. Once the switch is set, refer to the following Reassembly procedure.

4.5.4 REASSEMBLY

To reassemble the Model 1290, follow the steps below.

1. Slide the front panel and printed circuit board assembly into the instrument case and press it in
so that the printed circuit board contacts mate with th terminal block in the back of the case.
Tighten the front panel captive screw.

2. Perform configuration as outlined on the following page to ensure proper indicator setup and
operation.

16

4.6 CONFIGURATION/CALIBRATION MODE

The configuration/calibration mode is enabled by opening the Mode Selection Switch on the left
side of the lower board (see Figure 7). A list of all configurable parameters starts below.

When the unit is turned on in configuration/calibration mode, the display will show

1290

and then

COnF

.

Press F to initiate the configuration procedure, starting at the first parameter.
Press R to initiate the configuration procedure, starting at the last parameter.

Press ▲ to toggle the display from

COnF

to

CAL

, initiating output calibration mode, if required.

Pressing ▼ will display the software version number.

For each parameter you will either select one of several choices or enter a numerical value.

Press ▲ to modify or change the parameter or increase the number displayed.
Press ▼ to modify or change the parameter or decrease the number displayed.

Press F to save your changes and step to the next parameter.
Press R to step to the previous parameter without saving your changes.

For many parameter settings, the display initially alternates between a code and a numerical value.
Once you start to modify the value, however, only the numerical value will be shown.

When entering a numerical value, ▲ and ▼ are used to increase or decrease the number being

entered. The change in value for each step is either 1, 10, or 100, depending on the size of the
number. The increment is 1 for values up to 2010, 10 from 2010 to 20100, 100 from 20100 to

99900.

4.7 CONFIGURABLE PARAMETERS

The following is the complete sequence of configurable parameters. Default values are given on
page 24.

A. LINE FREQUENCY

The display shows

L.F.

(Line Frequency) followed by:

60

for 60 Hz, or

50

for 50 Hz

B. DECIMAL POINT POSITION

The display shows:

-----

for no digits after decimal point

----.-

for one digit after decimal point

---.--

for two digits after decimal point

--.---

for three digits after decimal point

-.----

for four digits after decimal point

1290 Strain Gage Input Indicator 17

B1. FULL SCALE READOUT

The display alternates between

F.S.U.

(Full Scale Value) and a numerical value from 10 to 99900.
Only the numerical value will be shown during modification., This value MUST be set equal to the
sensor full range, e.g. 10,000 PSI.

C. DISPLAY FILTER TIME CONSTANT

The display shows

F.T.C.

(Filter Time Constant) followed by:

.4

for 400 millisecond filter time constant

1

for 1 second filter time constant

2

for 2 second filter time constant

3

for 3 second filter time constant

4

for 4 second filter time constant

5

for 5 second filter time constant

D. INPUT INTERRUPT

The display shows

I.F.S.

(Input Fail Safe) followed by:

Hi

for up scale fail mode, or

Lo

for down scale fail mode.

E. SHUNT CALIBRATION

The display shows

S.C.

(Shunt Calibration) followed by:

On

for shunt calibration enabled, or

OFF

for shunt calibration disabled.

NOTE: Set Shunt Calibrations to On when using Dynisco transducers.

E1. SHUNT CALIBRATION VALUE

This step is skipped if the shunt calibration is

OFF

.

The display alternately shows

Shunt

and a numerical value from 40.0 to 100.0, but only the
numerical value will be shown during modification. This value corresponds to the percentage of the
Full Scale Value.

NOTE: When using Dynisco transducers, the Shunt Calibration value should be set to 80.0

F. EXTERNAL CONTACT function

The display shows

E.C.

(External Contact) followed by:

nr

to enable external contact for manual alarm reset, via rear terminals 7 and 8, or

Ho

to enable external contact for hold-on-value sampling.

F1. CONTACT STATUS

The display shows

C.S.

(Contact Status) followed by:

CL

if function selected above is performed with contact closed, or

OP

if function selected above is performed with contact open.

18

G. ALARM 1 OPERATIVE MODE

The display shows A1 (Alarm 1) followed by:

HA

High alarm with automatic reset

HL

High alarm with manual reset (High Latched Alarm)

LA

Low alarm with automatic reset

LL

Low alarm with manual reset (Low Latched Alarm)

OFF

for no Alarm 1

G1. ALARM 1 ACTION

This step is skipped if Alarm 1 is

OFF

.

The display shows A1 (Alarm 1) followed by:

rEU

for relay energized if no alarm condition (reverse action/fail safe), or

dir

for relay energized if alarm condition (direct action).

G2. ALARM 1 MASKING OPTION

This step is skipped if Alarm 1 is

OFF

or

HIGH

.

The display shows A1 (Alarm 1) followed by:

dIS

for masking option disabled, or

Enb

for masking option enabled.

This function masks low alarm conditions during startup until the measured value first becomes
greater than the alarm threshold plus hysteresis. The alarm must have been programmed as a low
alarm.

G3. ALARM 1 FILTER

This step is skipped if Alarm 1 is

OFF

.

The display shows F1 (Filter) followed by:

OFF

for no filter on alarm threshold, or

xxx

for filter with the time constant chosen in step C above.

G4. ALARM 1 HYSTERESIS

This step is skipped if Alarm 1 is

OFF

.
The display shows H1 (Hysteresis 1) followed by a value from 0.1 to 9.9.
This value corresponds to the percentage of the Full Scale Value.

H. ALARM 2

Follow the same procedure as in steps F-F4 above.

I. SERIAL COMMUNICATIONS PROTOCOL

NOTE: This step will default to:

OFF if unit does not have the Serial Communications Interface option.
ErO if unit has the Serial Communications Interface option.

The device will support the following protocols:

ErO

for polling/selecting protocol

nbUS

for Modbus protocol

1290 Strain Gage Input Indicator 19

JbUS

for Jbus protocol

OFF

to disable comms

NOTE: This indicator skips steps I1 and I2 if serial communication is not implemented (set to

OFF

).

I1. SERIAL COMMUNICATION DEVICE ADDRESS

The display shows

Adr

(address) followed by a number ranging from:
1-95 for polling/selecting protocol (1-31 being valid addresses)
1-255 for modbus/jbus protocol (up to 128 devices per multidrop link)

I2. SERIAL COMMUNICATION BAUD RATE

The display shows bd (baud rate) followed by:

150

for 150 baud

300

for 300 baud

600

for 600 baud

1.20

for 1200 baud

2.40

for 2400 baud

4.80

for 4800 baud

9.60

for 9600 baud

19.2

for 19200 baud

I3. SERIAL COMMUNICATION BYTE FORMAT

The display shows bF (byte format) followed by:

7E

for 7 bits with even parity

70

for 7 bits with odd parity

8E

for 8 bits with even parity

80

for 8 bits with odd parity

8

for bits with no parity

NOTE: The indicator skips steps L to L3 if analog retransmission is implemented.

L. ANALOG RETRANSMISSION (Option)

The display shows A0 (Analog Output) followed by:

0.20

for 0-20mA

4.20

for 4-20mA

0.10

for 0-10 V

OFF

for retransmission disabled

L1. ANALOG RETRANSMISSION SCALING: LOW SCALE VALUE

The display alternately shows

Ar. L.S.U.

(Analog Retransmission Low Scale Value) and a numerical
value. This parameter establishes the lower limit for the analog output; only the numerical value is
shown during modification. Resolution and decimal point position are as selected for the readout
value.

20

L2. ANALOG RETRANSMISSION SCALING: FULL SCALE VALUE

The display alternately shows

Ar. F.S.U.

(Analog Retransmission Full Scale Value) and a numerical
value. This parameter establishes the upper limit for the analog output; only the numerical value is
shown during modification. Resolution and decimal point position are as selected for the readout
value.

L3. ANALOG RETRANSMISSION FILTER

The display shows rF followed by:

OFF

for no filter on retransmitted value, or

xxx

for filter having the time constant chosen in step C.

Press F to lock in the parameter.

At this point the configuration procedure is complete and the display will return to showing

COnF

.

If necessary, you may now select the analog output calibration procedure by pressing ▲. Refer to

Analog Output Calibration, below.

When configuration/calibration is complete, remove the unit again, place the Mode Selection switch
in the “normal” (closed) position, and replace the unit. See Mode Selection, page 15.

Proceed to Operating Mode, page 21.

4.8 ANALOG OUTPUT CALIBRATION

Press ▲ to toggle the display from

COnF

to

CAL

, initiating output calibration mode.

Press ▼ to display the software version number.

Press F to initiate the calibration procedure, starting at the first parameter.
Press R to initiate the calibration procedure, starting at the last parameter.

Perform the calibration procedure in accordance with the jumper settings to select:

• Current Output, or

•Voltage output.

The jumper locations for these output selections are shown in Figure 6. When the display shows
CAL, you can also load the default parameters, shown on page 24.

To calibrate the analog retransmission output, connect a multimeter, set to the proper measurement
range, to terminals 21 and 22. Press the F key to reach desired parameter then make output

adjustments by pressing ▲ or ▼ until the signal output measured by the multimeter reaches the

proper value. The display only shows the number of counts for the digital to analog converter.

C6 - Retransmission current output minimum value - adjust to 50.0 mµ

C7 - Retransmission current output maximum value - adjust to 20.0 MA
C8 - Retransmission voltage output minimum value - adjust to 0.00 VDC
C9 - Retransmission voltage output maximum value - adjust to 10.00 VDC

1290 Strain Gage Input Indicator 21

After the last step , the calibration is complete. The display shows the measured input variable in bits
(approximately 1.6 microvolt/bit).

NOTE: The above procedure only applies to indicators ordered with the output option. Units are

precalibrated from the factory.

5. OPERATING MODE

In this mode the Model 1290 monitors the input signal, displays the measured value, and performs
alarm functions. You can display high and low peak values, lock and unlock the keyboard, reset
alarms, and perform transducer input calibration and alarm threshold settings. It is also possible to
load default parameters.

Parameter values listed below can always be viewed, but they can only be modified if the indicator
keyboard is unlocked. If anyone attempts to modify parameters when the indicator is locked, the
display will show

inh

.

5.1 KEYBOARD LOCK/UNLOCK

When the measured value is displayed (normal operating mode), you can lock or unlock the

keyboard by holding down the buttons in the following order; ▼ + R + F. The display will then

show the new desired mode:

Loc

or

UnLoc

.

5.2 TRANSDUCER INPUT CALIBRATION

You can modify the operating parameters and load default data only when the instrument is
unlocked and in local mode. Default values are shown on page 24.

NOTE:

1. Transducer/ Indicator calibration should be performed with the transducer at operating

temperature, and with no pressure applied.

2. The Zero and Full scale calibrations should be done concurrently.

1. ZERO TRANSDUCER CALIBRATION

Press F to enter the calibration mode.
The display will show

LO.OFF

.

Press the ▲ key once.

The display will show

LO.On

.
Press the F key to perform the zero calibration.
The display will blank except for 5 decimal points.
After a brief “time out” the unit will enter full scale calibration.

NOTE: In lieu of the ▲ key, pressing the F key will advance the indicator to the next parameter.

22

2. FULL SCALE TRANSDUCER CALIBRATION

The display alternates between

FU.S.C.

and the value of full scale in engineering units.

Press the ▲ key once.

The display shows

FU on

.
Press F to go to perform the full scale calibration.
The indicator automatically returns to operating mode after 6 seconds if no changes are made.

3. TARE CALIBRATION (weight applications only)

The display alternates shows

tArE

and the value of the tare in engineering units. The tare will be
forced to zero whenever zero or full scale calibration is performed. At this point there are two
options:

a. To perform calibration press ▲.

The display shows tA. followed by:

OFF

to disable calibration

ON

to enable calibration

b. If calibration is not needed, press F to go to the next parameter. The instrument

automatically returns to operating mode after 6 seconds if no changes are made.

5.3 ALARM SET POINTS

If the indicator has automatically returned to operating mode you can return to set the alarms by
following the procedure.

1. Alarm 1

Press F four times. The display will alternately show

1.xxxx

and the alarm set point where

xxxx

is a code for alarm operation mode. Only the alarm set point is shown during modification. Use

the ▲ and ▼ keys to modify this parameter. Resolution and decimal point position are as

selected for the readout value. Press F to store your change. The indicator automatically returns
to the normal operating mode after 6 seconds if no changes are made.

The codes for the remaining digits in the alarm operating mode are:

2nd digit 3rd digit 4th digit 5th digit

H

= High alarm

A

= Automatic reset

d

= Direct action

n

= Low alarm mask

L

= Low alarm

n

= Manual reset

r

= Reverse action

blank

= Not masked

for example, a display of

I.HAr

would indicate High alarm, auto reset, reverse action.

2. Alarm 2

The indicator will automatically enter this parameter after the F key is pressed to store the Alarm
1 set point. To enter Alarm 2 from the normal operating mode, press F five times. Programming
the Alarm 2 set point is the same as Alarm 1 above, except that the display alternately shows

2xxxx

and the alarm value.

1290 Strain Gage Input Indicator 23

5.4 ALARM RESET FUNCTION

This function can be performed when the indicator is locked; must be in local mode. If the alarm is
configured as a latched alarm (manual reset), alarm status is maintained even after the alarm
condition stops.

Press R + either arrow (▲ or ▼) to reset both Alarm 1 and Alarm 2. The external contact, if enabled,

resets both alarms. The rear terminal connections are 7 and 8. The external contact works even if the
indicator is in remote mode.

5.5 PEAK HOLD FUNCTION

The following actions can be performed when the indicator is locked, and in either local or remote
mode.

a. Monitoring Peak High and Peak Low.

By pressing ▲ while the measured value is displayed, it is possible to monitor the peak high

value. The decimal point at the right of the display will be lit steadily.

Press ▲ again to monitor the peak low value. The decimal point at the right of the display will

now blink on and off.

Press ▲ to redisplay the measured value (normal operating mode).

Press R + F to reset the peak high/peak low values and to restart for a new peak detection.

b. Hold-on value

The external contact can be used to freeze input signal sampling, holding the last measured
value for use on the display, alarms, retransmission, etc.
In this mode, the numerical value flashes on the display.

6. DEFAULT DATA LOADING PROCEDURE

In each one of the indicator’s three modes, configuration, calibration, and operation, you can load
default data to reset all of the parameters for that particular mode.

To load the default data:

Press ▼ + ▲, and once the display shows

dF OFF

, press ▲. When the display shows

dF On

press F.

Default data will now be loaded. During data loading time the display will show

L.dAtA

.

The default data for the three modes are shown on the following pages.

24

6.1 DEFAULT DATA FOR CONFIGURATION PARAMETERS

Parameter Description Setting

A Line frequency 60 Hz
B Decimal point position None
B1 Full scale readout 10000
C Display filter time constant 400 ms
D Input Interrupt High
E Shunt calibration Enable
E1 Shunt calibration value 80.0%
F External contact function Alarm manual reset
F1 Contact status Closure
G Alarm 1 operating mode High with automatic reset
G1 Alarm 1 action Reverse
G2 Alarm 1 masking option Disable
G3 Alarm 1 filter Off
G4 Alarm 1 hysteresis 1.0%
H Alarm 2 operating mode High with automatic reset
H1 Alarm 2 action Reverse
H2 Alarm 2 masking option Disable
H3 Alarm 2 filter Off
H4 Alarm 2 hysteresis 1.0%
I Serial communiction type OFF (w/o RS485) ERO (w/ RS485)
I1 Serial communication address 1
I2 Serial communication Baud rate 19200
I3 Serial communication byte format 7 bit, parity even
L Analog retransmission type 0.00 (Disable)
L1 Analog retrans. low scale value 0.00
L2 Analog retrans. full scale value 10000
L3 Analog retransmission filter Off

6.2 DEFAULT DATA FOR OPERATING PARAMETERS

Parameter Description Setting

1 Zero transducer calibration 0 mV
2 Full scale transducer calibration 33.3 mV
3Tare calibration 0 mV
4 Alarm 1 threshold setting 40% of fsv
5 Alarm 2 threshold setting 60% of fsv
6Keyboard status Unlocked

1290 Strain Gage Input Indicator 25

6.3 DEFAULT DATA FOR CALIBRATION PARAMETERS

Default calibration parameters are provided to allow the user to verify that the instrument is working
properly. They are not normally used as the final calibration values.

CAUTION: After default parameter loading, you should perform the proper indicator calibration
procedure.

7. ERROR MESSAGES

Diagnostics are performed at instrument startup and during normal mode operation. If a fault
condition is detected, the display will show the message Er followed by an error code. The following
is a list of possible errors in numerical order.

Er 1

The alarm threshold values or transducer calibration (tare or zero) are out of limits or their values in
memory are incorrect. The error may appear at instrument startup in operating mode.

After 3 seconds, the instrument will reset. Simultaneously press ▼ and ▲ to load default data. Then

load the desired threshold values and recalibrate the transducer.

Er 6

This error message appears during tare or zero transducer calibration if input value is greater than

±25% of full scale calibration. The same error message appears during full scale calibration if the
stored zero calibration value is greater than ±25% of the new full scale calibration. In both cases the

stored calibration value is not changed. This error message disappears automatically after 2 seconds.

Er 7

This error message appears during zero or full scale transducer calibration if a fault condition (hold­on-value/overrange/underrange/input open) is found on an input signal or if the span value is too
large (>55 mV) or too small (<2.8 mV). In both cases the stored calibration value is not changed.
This error message disappears automatically after 2 seconds.

Er 38

Error detected during EAROM read operation. This error may appear at instrument startup in
operating mode. This error message disappears automatically after 3 seconds, and the instrument
resets. If the error persists, return the instrument to your supplier.

If this error appears during configuration/calibration, press F or R to restart the procedure and then
repeat operations. If the error persists, return the instrument to your supplier.

26

Er 39

Error detected during EAROM write operation. This error may appear in operating mode when
storing a new value in EAROM (for example, alarm threshold or transducer calibration). the new
values will be enabled but they will be lost when the instrument is powered down. This error
message disappears automatically after 10 seconds.

If this error appears during configuration/calibration, press F or R to restart the procedure and then
repeat operations. If the error persists, return the instrument to your supplier.

Er 101

The configuration data stored in EAROM is wrong or inconsistent. The error may appear at
instrument startup in operating mode. This error message disappears automatically after 3 seconds,
and the instrument resets.

If the error persists, enable configuration/calibration mode with the internal switch, load the default
calibration data and then perform a new configuration.

Er 201

The calibration data stored in EAROM for analog retransmission is wrong. The error may appear at
instrument startup in operating mode. This error message disappears automatically after 3 seconds,
and the instrument resets.

If the error persists, enable configuration/calibration mode with the internal switch, load the default
calibration data and then perform a new analog retransmission calibration.

Er 312

Error during internal autozero measurement for temperature drift compensation. The instrument
repeats this check every 3 seconds. The analog retransmission and alarm go low scale or high scale
as a failsafe configuration. If the error persists, return the instrument to your supplier.

Er 402

The configuration/calibration data stored in EAROM is not protected. The error may appear at
instrument startup in operating mode. This error message disappears automatically after 3 seconds,
and the instrument resets.

If the error persists, enable configuration/calibration mode with the internal switch, power up the
unit and then return to operating mode. This action should be sufficient to enable data protection.

o o o o o

Over-range indication

1290 Strain Gage Input Indicator 27

This status is displayed when the A/D converter value is out of range, or the input signal is greater
than full scale value plus 27% of span, or the displayed value exceeds the display capability of

99900.

- o o o o

Under-range indication

This status is displayed when the A/D converter value is out of range, or the input signal is lower
than low scale value minus 27% of span, or the displayed value exceeds the display capability of -

1990.

OPEn

This message is displayed when the instrument detects an input on any one of the four transducer
leads.

8. REPAIR

Questions concerning warranty, repair cost, delivery, and requests for a RA# should be directed to
the Dynisco Repair Department, 508-541-9400 or email: [e-mail]. Please call for a
return authorization number (RA#) before returning any product. Damaged products should be
returned to:

DYNISCO LLC
Attn: RA # _______________
38 Forge Parkway
Franklin, MA 02038

For technical assistance please call 800-DYNISCO or 508-541-9400 or fax [phone].

9. WARRANTY

This Dynisco product is warranted under terms and conditions set forth in the Dynisco Web Pages.
Go to www.dynisco.com and click on “Warranty” at the bottom of any page for complete details.

NOTES:

WARRANTY REGISTRATION CARD

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