High Accuracy Differential
Pressure Transmitter
**HADP Series – Installation Instructions
**
INTRODUCTION
The high accuracy differential pressure transmitter is designed with dual
remote sensors that enable it to accept high pressure in ranges up to 5 PSI to
500 PSI. All models can handle overload pressure 2X the maximum fully scale
range and burst pressure is 5X the maximum full scale range.
Features include field selectable pressure ranges and output signal types,
output reversal and slow damping, port swapping and bidirectional measurements
for the most flexible applications. The output signal is factory calibrated
and temperature compensated for the highest start-up accuracy.
WARNING : Ensure that the maximum individual port pressure does not exceed the
highest pressure range of the unit. For example, the highest individual port
pressure on a 102 Range Code is 100 PSI. Exceeding this may damage the sensors
and give erroneous readings. See Figure 12 for ratings.
BEFORE INSTALLATION
Read these instructions carefully before installing and commissioning the
dewpoint transmitter. Failure to follow these instructions may result in
product damage. Do not use
in an explosive or hazardous environment, with combustible or flammable gases,
as a safety or emergency stop device or in any other application where failure
of the product could result in personal injury. Take electrostatic discharge
precautions during installation and do not exceed the device ratings.
MOUNTING
The transmitter mounts on a vertical surface using the two integrated mounting
holes. The remote sensor cable connection should be located on the bottom of
the enclosure. The two mounting holes will facilitate a #10 size screw (not
supplied). See Figure 1. Ensure there is enough space around the unit to make
the electrical connections and that it is within an acceptable distance for
the length of remote sensor cables. Avoid locations with severe vibrations or
excessive moisture. The enclosure has a standard opening for a conduit
connector or cable gland type fitting. In this position the High port is on
the left and the Low port is on the right as shown on the PCB.
The enclosure has a hinged cover with a latch. Open the cover by pulling
slightly on the latch on the bottom side of the enclosure and at the same time
pulling on the cover, s
illustrated in Figure 2.
A 1/2″ NPT threaded connection hole is provided in the left side of the
enclosure as shown in Figure 3. Screw the EMT connector or cable gland
connector in until tight. See Figure 4.
It is recommended that weatherproof conduit or cable gland fittings be used.
The F style enclosure includes 1/2″ NPT to M16 thread adapter and cable gland
fitting.
Two security screws are provided which can be installed to help secure the
cover once settings and wiring connections are complete. See Figure
4.
PLUMBING
The two stainless steel pressure sensors are labeled High and Low. The output
signal will indicate a positive value when the pressure applied to the High
sensor is greater than the pressure applied to the Low sensor, so ensure the
sensors are connected correctly as shown in a typical application in Figure 6.
Both sensors incorporate 1/4” NPT male threads for connection to the pipe
being monitored.
Do not allow material to fall into the pressure ports as contamination could
damage the sensors. It is recommended to use Teflon tape to prevent leaks.
Remove the High pressure sensor from the remote cable by unscrewing from the
remote cable boot as shown in Figure 7. Wrap 1/4” NPT male sensor threads with
Teflon tape. Screw into the sensor port on the pipe being monitored until
finger tight. Use an appropriate size wrench to tighten the sensor until snug
as shown in Figure 8. Reconnect the remote sensor cable you aligning the
remote sensor cable boot and screwing onto sensor. See Figure 9.
Repeat for the Low pressure sensor.
CONFIGURATION
Most configuration is done using User Menu setting with LCD and push buttons
on PCB. See User Menu section for details.
Warning : The transmitter must not have power applied during set up or
when making changes to the output signal.
Output Selection:
The transmitter features user-selectable output signals of 4-20 mA, 0-5 Vdc
and 0-10 Vdc. It is factory configured to operate in the Current (4-20 mA
output) mode, but can be changed to Voltage mode by sliding the output
selection switch from the position marked mA to the position marked VOLT as
shown in Figure 10.
In Voltage mode the output scale may be changed to either 0-5 or 0-10 Vdc by
accessing under User Menu.
WIRING
- Deactivate the 24 Vac/dc power supply until all connections are made to the device to prevent electrical shock or equipment damage.
- Use 14-22 AWG shielded wiring for all connections and do not locate the device wires in the same conduit with wiring used to supply inductive loads such as motors. Make all connections in accordance with national and local codes.
- Pull at least six inches of wire into the enclosure, then complete the wiring connection according to the wiring diagram for the applicable power supply and output signal type.
- Connect the plus DC or the AC voltage hot side to the PWR terminal. For voltage output or AC power, the supply Common is connected to the COM terminal. DO NOT connect power to the OUT terminals as the device will be damaged. It has half-wave power supply so the supply Common is the same as the signal Common. See Figure 11.
- The analog output is available on the OUT terminal. Check the controller Analog Input to determine the proper connection before applying power.
- If using the Zero function, connect the Remote Zero Switch between the ZERO and COM terminals.
START-UP
Upon applying power to the device, it will enter the start-up mode. The LCD
will display the current operating settings for 2 seconds each.
- SOFTWARE VERSION NUMBER
- MODEL PRESSURE RANGE
- THE OUTPUT TYPE At the end of start-up mode the device will enter normal mode displaying pressure read from sensors.
The User Menu can be accessed by pressing the
