ASHE VZ-70 User manual

OPERATION MANUAL
SINGLE CHANNEL DATA LOGGER
(WITH MICRO-SD CARD INTERFACE)

SINGLE CHANNEL DATA LOGGER
[WITH MICRO-SD CARD INTERFACE]
MODEL: VZ-70
DESCRIPTION
The VZ-70 is a micro-controller based Digital process Indicator with data logging feature,
offered in a highly compact, rugged and reliable execution. The instrument has three keys
on the front panel, with which the operator can set the parameters and configure the
instrument as desired. A four-digit red LED digital display is provided on the front panel
which indicates the process value in real time. The display can indicate any scale range
between –999 to +9999 units. A Micro-SD Card slot to insert or removed SD Card.
The instrument has non-volatile memory (i.e., in case of power failure, the set points and
other settings are retained in memory and the indication and control actions resume after
power is restored).
The instrument accepts a standard analog current loop signal of 4 to 20 mA DC and
displays the process value with Periodic data logging into Micro SD Card as well as in
Microcontroller memory(Limited 4000 logs) the set points of which may be configured
through the Membrane Keypad on the front panel. Data Logging will always start when
process value crosses this set point.
The process display is factory calibrated to the desired operating range of the input
through the instrument software and may be changed whenever desired.
The input signal is suitably isolated and conditioned by the micro-controller, which
displays the actual process value in real time on the digital display.
The micro-controller based process Indicating and data logger Model: VZ-70 is therefore
an ideal instrument for process measurement applications because of it’s versatility and
inherent accuracy in process measurement , besides other superior characteristics such
as total immunity to shocks, dust, ambient temperatures, and humidity. It is available in
standard DIN Rail enclosures. It operates on 24 V DC power supply.
Further, the instrument is manufactured using selected high-grade components which
guarantee it’s functionality and long operational life. The instrument carries a performance
guarantee against manufacturing defects and workmanship defects.
INSTALLATION
All interconnections to the instrument should be made with strong multi-strand wire of the
order of 2.5 sq.mm. The ends of the wires should be properly ferruled and suitable lugs
must be used for effective termination.
The cables carrying the input signal should be routed separately and properly isolated
from any power line cables in the vicinity, to prevent any electromagnetic interference in
the input signal readings from the mains power line. Use of shielded twisted pair cable is
recommended for input signals. The shield must be connected to Earth only at the
instrument end.

OPERATION & SETTINGS
The front panel of the Digital process Indicator Controller is as shown below:
The Digital Indicator Controller has a four-digit display window on the front panel for
indicating the process value. Further, MICRO-SD CARD socket to Insert and Remove
Micro-SD Card
CONTROL KEYS
The instrument has three keys on the front panel, functions of which are described below
The PROG or PROGRAM key is the central co-ordinating key to access the
settings of the instrument. Pressing this Key allows the operator to sequentially
view, change and save the parameters such as Zero and Span settings, Decimal
position, Set-points etc.
The INC or Incrementing key allows the operator to select the numeral in the
digit being set on an increasing scale. The digit will sequentially display 0, 1,
2….9 on each pressing of the INC key. This may be used to set the Zero/Span of
the display and Set-points of the Relays. The incrementing speed increases if
the key is kept pressed.
The DEC or Decrementing key allows the operator to select the numeral in the
digit being set on a decreasing scale or to select Cursor Position. The digit will
sequentially display 9, 8, 7….1 on each pressing of the DEC key. This may be
used to set the Zero/Span of the display and Set-points of the Relays. The
decrementing speed increases if the key is kept pressed.

SETTINGS & CALIBRATION
The following is the sequence of settings on the Digital Indicator / Controller. All settings
to be done using Increment (  ) and Decrement (  ) keys.
CONTROL SETTINGS
KEY
PRESSED
INITIAL
DISPLAY
ALTERNATING
DISPLAY
FUNCTION
(POWER
ON)
ASHE
(POWER
ON)
iPLO
CP-F
/CP-P
If Input Signal is below 3.8mA or is not connected.
-
iPHi
If Input Signal is above 20 mA.
CP-F Indicates Copy FAILED
CP-P indicates Copy PASS
000.0
If sensor is connected and input is between 4-20 mA,
then display will show corresponding process value
PROG
P
dP
100.0
Set the D ECIMAL P OSITION .
[Options are : 1000,100.0,10.00, 1.000]
These numbers indicate the position of the Decimal with
respect to the Least Significant Digit (right-most digit).
e.g., 1000 indicates No Decimal Point.
PROG
P
r nGL
000.0
R ANGE L OW setting: The desired Zero (lower) range for
the process being measured may be set using  and
 keys from -999 to 9999. Use  key to select decimal
positon and  key to change the number
PROG
P
r nGH
100.0
R ANGE H IGH setting: The desired Span (higher) range
setting for the process being measured may be set
using  and  keys from -999 to 9999. Use  key to
select decimal positon and  key to change the number
PROG
P
Zero
150
Using  and  keys adjust the counts for 4 mA Output.
PROG
P
SPAn
500
Using  and  keys adjust the counts for 20 mA
Output.
PROG
P
SEt
050.0
The S ET - POINT “Set” is displayed alternately with the
factory preset value.
PROG
P
L0G
10
The L OG INTERVAL “LOG” is displayed alternately with
the factory preset value.It can be adjusted using  and
 keys from 10 to 50 seconds
PROG
P
CP-L
nO
If “ No ” Selected and pressed PROG key. Display will
come to Main Window
YES
If “ YEs ” Selected and pressed PROG key. Instrument
will copy the content of Microcontroller latest Logs and
stored it in Micro SD CARD
PROG
P
COPy
Display will show ”COPY” message until data get copied
and then come to main window
PROG
P
(process
value)
CP-F
As per connected Input Signal. In case of copy failure
or absence of Micro SD Card. Display will toggle
between “ CP-F ” and Process Value
(process
value)
CP-P
If log is successfully Copied Display will toggle between
“ CP-P ” indicating Copy Pass and Process Value
This “CP-F” or CP-P Message will shown on regular
configured log interval (i.e; between 10 to 50 seconds)

CALIBRATION
All settings to be done using Increment (  ) and Decrement (  ) keys.
KEY
PRESSED
DISPLAY
ALTERNATING
DISPLAY
FUNCTION
Long
Press
Increment
(  )
4 mA
0750
This is Z ERO CALIBRATION setting.
Apply 4 mA and save the counts by using  key.
PROG
P
20mA
2560
This is S PAN CALIBRATION setting.
Apply 20 mA and save the counts by using  key.
PROG
P
(process
value)
As per connected Input Signal
RTC SETTINGS
All settings to be done using Increment (  ) and Decrement (  ) keys.
KEY
PRESSED
DISPLAY
ALTERNATING
DISPLAY
FUNCTION
Press
Increment
(  ) and
Decrement
(  ) keys
together
YEAr
0018
Here you can set Year. Here 18 Indicates 2018.Use
INC or DEC Key to Set the year
PROG
P
mon
0007
Here You can Set Month. Use INC or DEC Key to Set
the Month from 1to 12
PROG
P
dAtE
0017
Here You can Set Date. Use INC or DEC Key to Set
the Date from 1 to 31
PROG
P
mon
0007
Here You can Set Month. Use INC or DEC Key to Set
the Month from 1to 12
PROG
P
dAtE
0017
Here You can Set Date. Use INC or DEC Key to Set
the Date from 1 to 31
PROG
P
HoUr
0009
Here You can Set Date. Use INC Key to Set the Date
from 0 to 23
PROG
P
Min
0002
Here You can Set Minute. Use INC or DEC Key to Set
the Minute from 0 to 59
PROG
P
SEC
0017
Here You can Set Date. Use INC or DEC Key to Set
the Seconds from 0 to 59
PROG
P
(process
value)
As per connected Input Signal

KEY
PRESSED
DISPLAY
ALTERNATING
DISPLAY
FUNCTION
Press
Decrement
(  ) key
11.05
(process
value)
Momentarily shows current time and then process
value
Clearing Log Memory
All settings to be done using Increment (  ) and Decrement (  ) keys.
KEY
PRESSED
DISPLAY
ALTERNATING
DISPLAY
FUNCTION
Long
Press
Decrement
(  ) key
C-LG
nO
If “ No ” Selected and pressed PROG key. Display will
come to Main Window
YES
If “ YEs ” Selected and pressed PROG key. Instrument
will clear the content of Microcontroller latest Logs
PROG
P
(process
value)
As per connected Input Signal
This completes the entire settings of the Digital Process Indicator / Controller.
KEY NOTATIONS
ABBREVIATION
ON DISPLAY
EXPLANATION
iPLO
Input Low
iPHi
Temperature Sensor Fault
CP-P
Copy Pass
CP-F
Copy Fail

TECHNICAL SPECIFICATIONS
Model : VZ-70(Single Channel Data Logger)
Type : Microcontroller based Digital Process
Indicator with Data Logging
Input Signal : 4 to 20 mA DC.
Display : Seven-segment, Red LED display.
Indications : Four-digit display.
Scale Range : -999 to 9999 [Fully configurable].
Calibration Range : May be calibrated as required.
Decimal point : Selectable.
Response time : Typically 200 mS.
Output : 4 to 20 mA DC.
Memory : Non-Volatile (on EEPROM).
Logging Interval : 10 to 50 seconds(Configurable)
Settings : By Membrane Switchpad on front panel and
Modbus RTU commands
Features : Configurable for Scale Calibration, Decimal
point, Modbus RTU etc.
Accuracy :  0.1% FS.
Power Supply : 24V DC
Dimension : 75 x 55 x 110 mm [HxWxD].
Weight : Approximately 0.5 Kgs
Enclosure : Polycarbonate