DELTA OHM HD50CR-AS Low Pressure Transmitter Data Logger Instruction Manual

: June 4, 2024
: Delta OHM

Table of Contents

DELTA OHM HD50CR-AS Low-Pressure Transmitter Data Logger
INTRODUCTION
DESCRIPTION
INSTALLATION
ALARMS
STATISTICAL FUNCTIONS
CALIBRATION
MENU
MODBUS
TECHNICAL CHARACTERISTICS
INSTRUMENT STORAGE
SAFETY INSTRUCTIONS
PROBES AND ACCESSORIES ORDERING CODES
WARRANTY
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

DELTA OHM HD50CR-AS Low-Pressure Transmitter Data Logger

INTRODUCTION

HD50CR-AS is a relative or differential low pressure transmitter and data logger de-signed for wall flush-mounting. Measuring range ±100 Pa.
A silicon piezoresistive sensor with high accuracy and temperature compensation is used, which allows excellent linearity, repeatability and stability over the time. The auto-zeroing feature allows stable measurements over the time without the need to recalibrate.
An input for an optional relative humidity and temperature combined probe is provid-ed. The absolute humidity, the Dew Point and the wet bulb temperature can be calcu-lated.
Three 0…5/10 V and 0/4…20 mA analog outputs and a digital RS485 output with “Slave” Modbus-RTU protocol for connecting the instrument to a network of sensors are available.
The electroluminescent display has an inattinic red protection. The front keyboard al-lows scrolling the real time measurements and configuring the instrument.
Equipped with a USB port with mini-USB connector for the connection to a PC.
For each detected quantity, two alarm thresholds can be set by the user. Exceeding a threshold is signaled acoustically, by means of the internal buzzer, and visually, by lighting the alarm LEDs on
the front panel (only for the three measurements associat-ed with the analog outputs). An alarm hysteresis and a delay in the generation of the alarm can be configured for each detected quantity.
The PC software HD35AP-S allows configuring the instrument, viewing the real time measurements, downloading and viewing the data into a database. The HD35AP-CFR21 software option allows the protection of recorded data and configuration in re-sponse to FDA 21 CFR part 11 recommendations.
Brushed stainless steel front panel.
The instrument is supplied factory calibrated.

DESCRIPTION

DELTA-OHM-HD50CR-AS-Low-Pressure-Transmitter-Data-Logger-
FIG-1

Buttons:

Scrolls the real time measurement on the display.
In menu, increases the displayed value or move to the next parameter.
Displays the statistical functions (MIN, MAX, AVG).
In menu, decreases the displayed value or move to the previous parameter.
Enters the menu.
In menu, confirms the displayed value.
Cancel the operation or goes back to the previous level.

INSTALLATION

Make a 196 x 70 mm cut in the wall, at least 46 mm deep, and 4 holes according to the drilling pattern shown below, then wall mount the instrument by using the 4 holes on the front panel.
The connections on the upper part of the housing are as follows:
The three analog outputs are associated with the quantities of index CH1, CH2 and CH3 set in the F200 menu via the front keyboard of the instrument (see chapter 7) or via the HD35AP-S software.
The current analog output and the voltage analog output of the same channel (1, 2 or 3) are associated with the same quantity.
The RS485 connection is shown below.
Connect any combined temperature and relative humidity probe to the 8-pole M12 connector on the bottom of the housing.

CONFIGURATION

The operating parameters of the instrument can be configured in various way:

Via front keyboard (see chapter 7).
Via the HD35AP-S application software, connecting the instrument to the PC via USB.
Via the Modbus-RTU protocol and the RS485 connection (see chapter 8).

The HD35AP-S application software is downloadable from Delta OHM website For the use of the application software, see the corresponding instructions.

ALARMS

For each detected quantity, two alarm thresholds can be set by the user. The alarm is generated if the measured value falls below the lower threshold or rises above the up-per threshold.
Exceeding a threshold is signaled:

acoustically, by means of the internal buzzer (if enabled);
visually, by lighting the alarm LEDs on the front panel (only for the three meas-urements associated with the analog outputs);

An alarm hysteresis and a delay in the generation of the alarm can be configured for each detected quantity. The amplitude of the hysteresis is in percentage (0…100%) of the difference between the two alarm thresholds. For example, if the hysteresis is 2% (default value), the lower threshold is 10 °C and the upper threshold is 60 °C, the hysteresis in °C is equal to (60-10)x2/100= 1 °C. DELTA-OHM-HD50CR-AS-Low-Pressure-Transmitter-Data-
Logger-FIG-8

The alarm is generated after the set delay time or immediately if the “no delay” option is selected (default). If the alarm condition disappears before the delay time has elapsed, the alarm is not generated.
Enabling the Buzzer Latch option, the buzzer continues to sound even after the alarm condition has ceased.
In the event of an alarm in progress with the buzzer active, the buzzer can be silenced for a configurable time. Once the set time has elapsed, the buzzer will resume sounding or not depending on whether the alarm condition is still present or not.
The following example shows the silencing of the buzzer with Latch option disabled. DELTA-OHM-HD50CR-AS-Low-Pressure-Transmitter-Data-Logger-
FIG-10
The following example shows the silencing of the buzzer with Latch option enabled.

STATISTICAL FUNCTIONS

The instrument calculates and displays the maximum (MAX), minimum (MIN) and average (AVG) value of the detected measurements.
In order to display the statistical information, press FUNC/6: the instrument shows the maximum value of the displayed quantity. To scroll the maximum values of the various quantities use the 5 key.
By pressing FUNC/6 again, the instrument shows the minimum value of the dis- played quantity. By pressing FUNC/6 again, the instrument shows the average value of the displayed quantity.
By pressing FUNC/6 once more, the instrument asks if the calculation of the statisti-cal values is to be reset (FUNC CLR). Select YES or nO using 6/5 keys, then confirm with the MENU/↵ key.

CALIBRATION

The instrument calibrates automatically at regular intervals (default 60 minutes, the in-terval is configurable) the zero of the differential pressure, temporarily disconnecting the pressure inputs through an internal solenoid valve.
Via the Fb00 menu (see chapter 7) it is possible to perform a manual calibration in one or two points. In order to perform manual calibration, it is necessary to unscrew the two front caps that cover the calibration inputs. To perform zero calibration (Fb05 in the menu), leave both inputs open. To perform calibration at non-zero values (gain calibration, Fb08 in the menu), connect the front inputs to a low differential pressure generator.

The differential pressure zero calibration is also possible via the Modbus Coil register with address 72 (see chapter 8).
At the end of the calibration or verification, firmly screw the front caps so that the seal is tight and the inputs are not affected by the external pressure.
Via the Fb00 menu it is also possible to calibrate the relative humidity sensor of the combined temperature and relative humidity probe at points 33% RH and 75% RH.
Warning: the optional combined relative humidity and temperature probe must be calibrated in line with the instrument. If the probe is ordered with the instrument, the probe is already factory calibrated. If the probe is ordered later, the calibration must be performed by the user via the Fb00 menu.

The menu accessible via the front keyboard allows displaying the instrument infor-mation and changing operating parameters. The menu is structured in levels, with main categories and submenus.
To access the menu, you need to enter the user password (configurable through the appropriate menu item) or the administrator password (supplied with the instru-ment and not editable). Entering the user password makes some settings not change-able.
The instrument exits automatically the menu if no key is pressed for 3 minutes. After exiting the menu, the password remains active for a few minutes, during which you may enter the menu again without re-entering the password. It is possible to exit the menu by disabling immediately the password by performing a password level reset in the Password menu.

To access a menu parameter, proceed as follows:

Press MENU, the first digit of the password will blink.
Using 6/5 keys, set the first digit and confirm (MENU/↵ key), the second digit of the password will blink. Set the remaining digits in the same way.
Using 6/5 keys, select a main category in the menu and confirm (MENU/↵ key).
If the selected main category has a submenu, select the desired item using 6/5 keys and confirm (MENU/↵ key).
Using 6/5 keys, select the desired parameter: the parameter current setting is displayed.
To change the selected parameter, if allowed, press MENU/↵, the parameter set-ting blinks. Use 6/5 keys to change the setting, then confirm (MENU/↵ key). You can fast forward by keeping 6 or 5 key depressed.

To exit the main menu or a sub menu, press ESC key.
If it is not allowed to change a parameter, the notice N/A (Not Available) will appear when trying to change it.

Menu main category

F100 (DEV INFO): instrument general information
F200 (MEAS MENU): selection of the quantities to be detected
F300 (DISP LOOP VIEW): selection of the quantities to be displayed cyclically
F400 (ALRM MENU): setting of the alarms
F500 (UNIT MEAS MENU): units of measurement
F600 (LOG MENU): logging settings
F700 (AN OUT MENU): setting of the analog outputs
F800 (MODBUS MENU): Modbus settings
F900 (CLK MENU): clock settings
FA00 (PSW MENU): password settings
Fb00 (CAL MENU): calibration settings
F100 submenu (DEV INFO)
Instrument general information.
F101: model
F102: serial number
F103: user code
F104: group name
F105: firmware version
F106: firmware date
F107: factory calibration date
F108: user calibration date
F109: type of calibration in use (factory or user)
F110: external probe serial number
F200 submenu (MEAS MENU)
Selection and sorting of the quantities to be detected.
F201: temperature measurement index {CH1…CH6, default=CH2}
F202: relative humidity measurement index {CH1…CH6, default=CH3}
F203: Dew Point measurement index {CH1…CH6, default=CH4}
F204: Absolute humidity measurement index {CH1…CH6, default=CH5}
F205: Wet bulb temperature measurement index {CH1…CH6, default=CH6}
F206: differential pressure measurement index {CH1…CH6, default=CH1}
Set a measurement to OFF to exclude it.
F300 submenu (DISP LOOP VIEW)
Selection of the quantities to be displayed cyclically.
Note: in the F300 submenu, only the quantities to be detected appear, in the order set in the F200 submenu.
F301: quantity of index 1 {On/OFF, default=On}
F302: quantity of index 2 {On/OFF, default=On}
F303: quantity of index 3 {On/OFF, default=On}
F304: quantity of index 4 {On/OFF, default=OFF}
F305: quantity of index 5 {On/OFF, default=OFF}
F306: quantity of index 6 {On/OFF, default=OFF}
F400 submenu (ALRM MENU)
Setting of the alarms.
Note: in the F400 submenu, the quantities appear in the order set in the F200 sub-menu.
F408: period, in seconds, of the beep emitted by the buzzer {1…3600, default=2} F409: duration, in seconds, of the beep emitted by the buzzer {0.1…20, default=1.0} F410: alarm of the quantity
of index 1
F411: lower alarm threshold
F412: lower alarm threshold enabling {On/OFF, default=On}
F413: upper alarm threshold
F414: upper alarm threshold enabling {On/OFF, default=On}
F415: alarm hysteresis in % of the difference between the two alarm thresholds {0…100 %, default=2%}
F416: delay time in signaling the alarm {max. 960 min, default=0}
F417: buzzer enabling {On/OFF, default=OFF}
F418: buzzer “Latch” function enabling {On/OFF, default=OFF}
F419: buzzer silencing time, in minutes {0…1080, default=0}
F460: alarm of the quantity of index 6
F461: lower alarm threshold
F462: lower alarm threshold enabling {On/OFF, default=On}
F463: upper alarm threshold
F464: upper alarm threshold enabling {On/OFF, default=On}
F465: alarm hysteresis in % of the difference between the two alarm thresholds {0…100 %, default=2%}
F466: delay time in signaling the alarm {max. 960 min, default=0}
F467: buzzer enabling {On/OFF, default=OFF}
F468: buzzer “Latch” function enabling {On/OFF, default=OFF}
F469: buzzer silencing time, in minutes {0…1080, default=0}
F500 submenu (UNIT MEAS MENU)
Units of measurement.
F501: temperature unit of measurement {°C/°F, default=°C}
F502: differential pressure unit of measurement {hPa / kPa / atm / mmHg / mmH2O / inHg / inH2O / (kgf /cm2) / PSI / mbar / bar / Pa, default=Pa}
F600 submenu (LOG MENU)
Logging settings.
F601: logging enabling/disabling {On/OFF, default=On}
F602: choice between cyclical management (the new data overwrite the old ones when the memory is full) or non-cyclical management (logging stops when the memory is full) of the instrument
internal memory {YES=cyclical management / NO=non-cyclical management, default=YES}
F603: logging interval (if it is higher than the measuring interval, the average of the measurements acquired during the interval will be stored) {default=30 s}
F604: measurements acquisition interval {default=1 s}. If a value higher than the logging interval is set, the measurements will be detected with interval equal to the logging interval.
F605: deletion of all stored measurements from the instrument memory {YES/nO}
F700 submenu (AN OUT MENU) Setting of the analog outputs. F710: analog output 1
F711: 0-20 mA / 4-20 mA selection for the current output {default=4-20 mA} F712: 0-5 V / 0-10 V selection for the voltage output {default=0-10 V}
F713: value of the quantity associated with the analog output corresponding to 0/4 mA and 0 V {default=-100 Pa}
F714: value of the quantity associated with the analog output corresponding to 20 mA and 5/10 V {default=+100 Pa}
F715: analog output test mode. The current output goes to the value entered. Set OFF to exit the test mode.
F716: analog output test mode. The voltage output goes to the value entered. Set OFF to exit the test mode. F720: analog output 2
F721: 0-20 mA / 4-20 mA selection for the current output {default=4-20 mA} F722: 0-5 V / 0-10 V selection for the voltage output {default=0-10 V}
F723: value of the quantity associated with the analog output corresponding to 0/4 mA and 0 V {default=0.0 °C}
F724: value of the quantity associated with the analog output corresponding to 20 mA and 5/10 V {default=100.0 °C}
F725: analog output test mode. The current output goes to the value entered. Set OFF to exit the test mode.
F726: analog output test mode. The voltage output goes to the value entered. Set
F731: 0-20 mA / 4-20 mA selection for the current output {default=4-20 mA}
F732: 0-5 V / 0-10 V selection for the voltage output {default=0-10 V}
F733: value of the quantity associated with the analog output corresponding to 0/4
mA and 0 V {default=0.0 %RH}
F734: value of the quantity associated with the analog output corresponding to 20
mA and 5/10 V {default=100.0 %RH}
F735: analog output test mode. The current output goes to the value entered. Set
OFF to exit the test mode.
F736: analog output test mode. The voltage output goes to the value entered. Set OFF to exit the test mode. protocol and go in receiving mode right after transmission / YES=respect pro-tocol
and wait 3.5 characters after transmission, default=nO}
F805: enabling of the password for changing the configuration via Modbus {On/OFF,
F900 submenu (CLK MENU)
Clock settings.
F901: year
F902: month
F903: day
F904: hour
F905: minutes
F906: enabling of the automatic synchronization of the internal clock with a reference
server {On/OFF, default=OFF}
F907: time zone {default=0}
FA00 submenu (PSW MENU)
Password settings.
FA01: exits the menu and deactivates immediately the password {YES/nO}. The password will not remain active for some minutes as it normally happens when exiting the menu: you will need to
re-enter the password even if you re-access immediately the menu.
FA02: setting of the user-level password {default=0000}
FA03: locking of the instrument keyboard {YES/nO, default=nO}. If the keyboard is locked, keep the MENU/↵ key pressed for 7 seconds to unlock it.
Fb00 submenu (CAL MENU)
Calibration settings.
Fb03: relative humidity sensor calibration at 75%RH
Fb04: relative humidity sensor calibration at 33%RH
Fb05: differential pressure calibration at zero
Fb06: enabling of the differential pressure auto-calibration at zero {On/OFF, de- fault=On}
Fb07: interval, in minutes, of the differential pressure auto-calibration at zero {5…360, default=60}
Fb08: differential pressure second calibration point (in Pa)
Fb09: reset of the differential pressure second calibration point
Fb10: type of calibration used {FACT=factory / USEr=user, default=FACT}

MODBUS

The device general information can be read through the function code 0x2B/0x0E:

Manufacturer (Delta OHM)
Model
Firmware version

The complete list of MODBUS registers is shown below. If you try to read a register that is not present, the instrument returns the fixed value 32767. The list of the available registers can be downloaded in the PC using the function ” Download the list of MOD-BUS registers of the device ” included in the Settings sections of HD35AP-S software (see software instructions).
The following conventions have been used in the tables:

Type: b = bit, B = 8 bits (Byte), W = 16 bits without sign (Word), SW = 16 bits with sign
(x10) = decimal value expressed as an integer (e.g., if the content of the register is 184, the value is to be intended as 18,4).
(x100) = centesimal value expressed as an integer (e.g., if the content of the reg-ister is 500, the value is to be intended as 5,00).

The commands for requesting units of measurement return an index according to the correspondence indicated in the table below:

Indexes of the units of measurement

Index| Unit of meas.| Index| Unit of meas.| Index| Unit of meas.| Index| Unit of meas.| Index| Unit of meas.
---|---|---|---|---|---|---|---|---|---
0| °C| 13| inchHg| 26| J/m2| 39| inch| 52| l/min
1| °F| 14| inchH2O| 27| µJ/cm2| 40| counts| 53| gallon/min
2| %UR| 15| kgf/cm2| 28| V| 41| mm/h| 54| m3/min
3| g/m3| 16| PSI| 29| mV| 42| inch/h| 55| m3/h
4| g/kg| 17| m/s| 30| mA| 43| counts/h| 56| µmol/(m2s)
5| mbar| 18| km/h| 31| ppm| 44| mW/m2| 57| mm/day
6| bar| 19| ft/s| 32| Hz| 45| m| 58| kV
7| Pa| 20| mph| 33| %| 46| s| 59| A
8| hPa| 21| knot| 34| degrees| 47| µW/lumen| 60| kA
9| kPa| 22| W/m2| 35| lux| 48| dB| |
10| atm| 23| µW/cm2| 36| m2/s| 49| dBA| |
11| mmHg| 24| Wh/m2| 37| g (*)| 50| kWh| |
12| mmH2O| 25| kWh/m2| 38| mm| 51| l/s| 255| Not defined

The commands for requesting units of measurement return an index according to the correspondence indicated in the table below:
Indexes of the units of measurement

Address	Type	Discrete Input description
7	b	If 1, at least a quantity is in alarm.

Coils – Read/Write parameters

Address	Type	Coil description

| Receiving mode after transmission with Modbus protocol: 0=violate protocol and go in receiving mode right after transmission

1=respect protocol and wait 3.5 characters after transmission

1| b| Logging status: 0=active, 1=inactive
2| b| Logging mode: 0=non cyclic, 1=cyclic
3| b| Set 1 to delete the device logging memory. Bit zeroing is automatic.

| Protection of configuration with password: 0=no, 1=yes

Changing the parameter requires the Administrator password (see Holding Register 10036).

23| b| Enabling of the lower alarm threshold for the quantity #1: 0= disabled, 1= enabled
24| b| Enabling of the lower alarm threshold for the quantity #2: 0= disabled, 1= enabled
25| b| Enabling of the lower alarm threshold for the quantity #3: 0= disabled, 1= enabled
26| b| Enabling of the lower alarm threshold for the quantity #4: 0= disabled, 1= enabled
27| b| Enabling of the lower alarm threshold for the quantity #5: 0= disabled, 1= enabled
28| b| Enabling of the lower alarm threshold for the quantity #6: 0= disabled, 1= enabled
35| b| Enabling of the upper alarm threshold for the quantity #1: 0= disabled, 1= enabled
36| b| Enabling of the upper alarm threshold for the quantity #2: 0= disabled, 1= enabled
37| b| Enabling of the upper alarm threshold for the quantity #3: 0= disabled, 1= enabled
38| b| Enabling of the upper alarm threshold for the quantity #4: 0= disabled, 1= enabled
39| b| Enabling of the upper alarm threshold for the quantity #5: 0= disabled, 1= enabled
40| b| Enabling of the upper alarm threshold for the quantity #6: 0= disabled, 1= enabled
47| b| Enabling of the buzzer for the quantity #1: 0= disabled, 1=enabled
48| b| Enabling of the buzzer for the quantity #2: 0= disabled, 1=enabled
49| b| Enabling of the buzzer for the quantity #3: 0= disabled, 1=enabled
50| b| Enabling of the buzzer for the quantity #4: 0= disabled, 1=enabled
51| b| Enabling of the buzzer for the quantity #5: 0= disabled, 1=enabled
52| b| Enabling of the buzzer for the quantity #6: 0= disabled, 1=enabled
59| b| Enabling of the buzzer “Latch” function for the quantity #1: 0= disabled, 1=enabled
60| b| Enabling of the buzzer “Latch” function for the quantity #2: 0= disabled, 1=enabled
61| b| Enabling of the buzzer “Latch” function for the quantity #3: 0= disabled, 1=enabled
62| b| Enabling of the buzzer “Latch” function for the quantity #4: 0= disabled, 1=enabled
63| b| Enabling of the buzzer “Latch” function for the quantity #5: 0= disabled, 1=enabled

Input Registers – Read-only parameters

Address	Type	Input Register description

Measured values and status of measurement alarms
2| SW| R ELATIVE H UMIDITY in % (x10).
3| B| Relative humidity alarm: