The Interface Solution Experts
17
THZ
2
&
TDZ
2
Programmable Smart HART
Temperature Transmitter and Display
Sensor Trimming–
Sensor Trimming increases the
measurement accuracy of your instrument by match-
ing the reading of its actual input, to either a calibrated
source or the device to which it is connected. This veri-
fies that the input to the transmitter is being interpreted
correctly.
You may trim any point between 0% and 100% along
the scale.
Note that one-point trimming applies an
offset to the sensor reading, while two-point trimming
applies both an offset and a gain.
Follow the steps below in order to perform sensor
trimming.
1. Select either
1 Point
(one-point trimming) or
2 Points
(two-point trimming) by clicking the
appropriate button. Each pair consists of
Set
Value
and
Trim
fields.
2. Enter the values that require trimming into
the
Set
Value field and click
Set
.
3. Apply the targeted signal to the input, wait
until it settles, and click
Trim
to capture the
measured value. If you chose
2 Points
,
repeat the step above for the second point.
Note:
Once you have configured all parameters, download
to the unit by selecting Download in the Transfer
dropdown menu located in the Menu Bar. Or, click
the button in the Tool Bar.
Broken Wire Detection–
During operation, the THZ
2
and TDZ
2
send random microamp pulses through input
wiring to check for broken wiring or a burned out sen-
sor.
To utilize
Broken Wire Detection
, check the
Enabled
box. If a failure is detected, a message will appear in
the
THZ2/TDZ2 Status
box.
Running Average Filter Settings–
This function is for
filtering the input signal. The THZ
2
and TDZ
2
provide
this filter with a user-selected range between 1 and 16.
Factory default is 1.
Note:
A higher Running Average Filter setting provides
smoother output transitions; however, reduces
response time. Conversely, a lower setting provides
a faster response time, but may seem more unstable.
PV Damping–
PV Damping allows you to introduce a
delay into the response of your unit in order to stop
short-lived spikes from initiating faults and generating
fault messages.
The configured damping period will determine the time
response that the analog output will take to achieve a
66% change in output in response to a stepped input.
To enable PV Damping, select the
Enabled
button.
Use the arrows to select a value between 1sec and
30sec.
Sensor Range–
Allows you to set your upper and
lower range values within the range chosen in the
Input Type
section.
The desired Upper and Lower Range settings can be
entered via your PC keyboard or captured. To capture
an input, follow the steps below.
1. Apply the desired Upper Range input and
press the corresponding
Capture
button.
2. Next, apply the desired Lower Range input
and press the corresponding
Capture
button.
