USER TRIM
Supply
User trim function allows manual adjustment of the analog output, this is useful for minor calibration adjustment or
trimming out any sensor error, ± 5 % of range adjustment is available at both offset and span. Raise and lower buttons
are provided on the front panel of the transmitter, accessed using a 3 mm flat blade screw driver. Insert the screw
driver into the appropriate slot to operate the button. The button has a click action.
The transmitter will automatically detect the correct trim point (offset or span) based on the output signal. Offset will be
trimmed when the current in the offset band, span when the current is in the span band. No trim action occurs at any
other current. Note this function needs to be selected by the software configuration tool before use. To lock settings
after adjustment the operator can again use the tool to turn this function off, (select the option to save trim when
downloading configuration).
METHOD
1.0 Connect transmitter to a suitable input simulator or sensor.
Connect supply, connecting a digital meter to monitor output.
Turn supply on, set input to offset/span calibration point.
IMPORTANT - IF PERFORMING TWO POINT CAL, ALWAYS CAL
OFFSET FIRST.
2.0 Enter trim menu by pressing "raise" button for two seconds.
When the trim menu is open the range LED will flash :-
+
-
Screw Driver
Ø 3 mm
20.000
Digital mA meter
Input Simulator
or sensor
Output
Signal
offset
span
Range
Offset
Span
(4 to 20) mA
(3.8 to 6) mA
(18 to 22) mA
(0 to 20) mA
(0 to 2) mA
(18 to 22) mA
User mA
User low ± 2 mA (Min 0 mA)
User High ± 2 mA (Max 24 mA)
(0 to 10) V
(0 to 1) V
(9 to 11) V
UserV
User low ± 1 V (Min 0 V)
User High ± 1 V (Max 12 V)
Enter
Green Ok LED will indicate Trim action
> 2 s
3.0 Trim output current by
pressing either the raise or
lower button, single click to
step advance, or press contin-
uously to auto advance.
4.0 Once trim is complete allow
30 seconds with no button
press, the transmitter will time
out
and
return
to
normal
operation.
Raise
Lower
Escape
> 30 s
USER RANGE CONFIGURATION
This function allows two point manual configuration of the re-transmission current (voltage) at low and high range against a live input
signal. This is useful for on-site configuration, example with a slide wire input the user manually position the slide at both low and high
position and configures the unit to operate over this range. Configuration is achieved using either the raise (span) or lower (offset)
buttons.
To operate this function it must first be selected using the software configuration tool. The operator may lock this function (once set) by
turning off the function.
METHOD
1.0 Connect transmitter to a suitable input simulator or sensor. Connect supply, turn supply on, set input to either offset or span calib-
ration point.
2.0 To enter configuration, set input to desired high or low
setting and wait 10 seconds. Press and hold raise(high) or
lower(low) button on for 2 seconds to enter.
The Ok LED will then start to flash at a slow rate (low) or fast
rate(high).
3.0 Once the menu has been entered, quickly (within 1 second)
apply a single press the the raise(high) lower(low) button to store
setting.
To abort configuration, allow configuration to time out by not
pressing buttons for 5 seconds.
Ø 3 mm
Screw Driver
Input Simulator
or sensor
+
-
Low- slow toggle
High fast toggle
Input out of range
> 2 s
Enter High scale
config
Enter Low scale
config
< 1 s
Single Press
Store High scale config
Store Low scale config
Green Ok LED will indicate Trim action
A
B
C
A
B
C
A
B
C
A
B
C
A
B
C
A
B
C
A
B
C
A
B
C
A
B
C
17
18
16
TRIP 1 (A)
A
B
C
14
15
13
TRIP 2 (B)
Action
Normal
Trip
Range Error
Power off
Hi_ Al
Lo_Al
Hi_ Con
Lo_Con
OUTPUT DAMPING
User adjustable damping of the analog output is provided for both rising and falling signal. The adjustable range is (0 to 250) second for a ( 0 to 20) mA or
(0 to 10) V swing. To calculate rate of change of output signal divide 20mA (10 V) by damping setting, example if damping is set to 100 seconds the mA
output will change at a rate of (20/100) = 0.2 mA /Second. Use USB_LINK software to configure damping setting.
TRIP OUTPUTS
Dual trip SPDT relays are available. The contacts are rated at 240 V ac 1 A (Non inductive) 30 V DC 1 A. An external snubber network is recommended when
switching inductive circuits. Please ensure the snubber network is rated for the application. Four actions are provided, as detailed in the diagram below.
The Alarm actions may also be used for inverted control applications, example the high alarm action can be used to control a cooling fan when used to
control the temperature of a heat source. Ajustable setpoint and deadband are provided together with adjustable on and off delays for each trip. The
delay range is ( 0 to 250 ) Seconds.
SP
DB
Hi_Alrm
Trip
Led
Lo_Alrm
SP
Trip
Led
DB
Hi_Ctrl
Trip
Led
SP
DB
Lo_Ctrl
SP
Trip
Led
DB
Offset slow toggle
Span fast toggle
Out of trim range
Input out of range
